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    • 专利摘要:
    The filter element arrangement (100) for a gas purification device from an internal combustion engine casing comprises: - a filter element (15) rotatably mounted about an axis and having a filter medium (20); ) annular, - a rotor element (18) adapted to be part of a rotating drive system, for rotating the filter element with notches formed on the outer face (F) of a sleeve (19). The flanges (31, 32) of the filter element (15) are fixed to one another in an interior space bounded by the media (20), typically snap-fastening, using at least one retaining member (44). ) and an anchoring portion cooperating with each other with an anti-rotation effect. The anchoring portion is provided with internal projections (38) forming contact surfaces (SC), preferably angular, which engage with the notches of the sleeve (19) when the rotor element (18) is inserted into the interior space.
    公开号:FR3035336A1
    申请号:FR1553707
    申请日:2015-04-24
    公开日:2016-10-28
    发明作者:Samuel Bonne；Christophe Petipas；Jean-Jacques Falchon
    申请人:Filtrauto SA；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The present invention relates to devices for separating elements suspended in a gas from a crankcase. of internal combustion engine. The field of application of the invention relates in particular to the separation of oil from the crankcase gases in the combustion engines of road vehicles (eg automobiles, trucks, motorcycles), boats or industrial engines (for example a generator) . BACKGROUND OF THE INVENTION In a manner known per se, the casing is connected to the air intake of the internal combustion engine via a separating device in order to continuously evacuate the crankcase gases and to extract the same. oil in suspension. This is known as a crankcase recirculation circuit or blow-by gas by one skilled in the art.
    [0002] Various means of separating the oil from the crankcase gases are employed in the prior art, among which are cyclones, baffles, centrifugal separators, static coalescers and dynamic coalescers.
    [0003] In the category of dynamic coalescers, the media used is typically the same as in the static coalescers, the filter element comprising this media being further rotated. These devices combine the advantages of static coalescer and centrifugal separators: the efficiency is high thanks to the filter media and the pressure drop is reduced thanks to the centrifugal effect which contributes to the evacuation of the oil out of the media. This rotation makes it possible to use a more closed and therefore more efficient media while keeping an acceptable pressure drop. Reference is made in particular to document FR 2 933 626 which describes such a device. The rotor element engaged in the interior space of the filter element typically cooperates with one of the two flanges of the filter element. However, the other flange may then present a greater risk of rupture due to torsional forces (these efforts tend to take off the flange relative to the filter media).
    [0004] Another disadvantage of this kind of separation device is that its construction is more complex because of the mobility of the parts and the sealing requirements between the zone upstream of the filter element where the crankcase gases circulate and the zone downstream where the purified gases flow. Assembly on the drive shaft can also be tricky. This results in an additional cost that limits the use of dynamic coalesceurs. OBJECTS OF THE INVENTION The object of the present invention is to overcome one or more of the aforementioned drawbacks by proposing a filter element arrangement for a de-oiling device for the gases coming from a crankcase, which is simpler to design.
    [0005] To this end, the invention relates to a filter element arrangement for a device for purifying a gas coming from an internal combustion engine casing, which comprises: a filter element mounted to rotate about an axis and 30 having an annular filter medium, and - a rotor element adapted to be part of a rotating drive system, for rotating the filter element with notches formed on the outer face of a sleeve , In that the flanges of the filter element are fixed to one another in an interior space delimited by the filter medium (typically by snapping), using at least one retaining member and one anchoring part 5 cooperating with each other with an anti-rotation effect, the anchoring portion being provided with engagement means or internal projections forming contact surfaces (preferably angular), which engage in the notches of the sleeve when the element of rotor is in stored in the interior space. The annular filter medium, in particular of the type provided with a coalescer media, extends longitudinally between a first axial face and a second axial face around a central axis, the filter medium having an internal face delimiting the internal space. . The rotor member, for rotating the filter element, is engaged in the inner space against a plurality of contact surfaces of the filter element in a state assembled between the rotor element and the filter element. The one-piece sleeve, which is part of the rotor element, extends longitudinally about the central axis and the N notches formed on the outer face are delimited each between two longitudinal edges (N being a whole number greater than or equal to to two). In practice, the filtering element comprises a first flange covering the first axial face and provided with a first central opening allowing the insertion of the sleeve into the interior space, this first flange comprising the anchoring part which extends in the inner space longitudinally around the sleeve towards the second flange of the filter element. First spaced apart contact surfaces (of the plurality of contact surfaces) are defined by the anchoring portion which has N radially inwardly projecting engaging means for snugly engaging in the N notches (thus being able to cooperate with one and the other of said two longitudinal edges and to block any relative rotation between the two flanges.) The retaining member or members, which form part of the second flange, are engaged with the part of anchoring to make the first and second flanges integral in rotation With such an arrangement, it is permissible to index the two flanges relative to one another while achieving rotational locking on the drive sleeve. The engaging means which form projections of the anchoring portion play a role quite similar to that of keys, but unlike a key, each projection can be integrally formed with the key. flange, which limits the risk of breakage. According to a feature, the second flange comprises two spaced apart retaining members engaged with the anchoring portion and to make the first and second flanges integral in rotation. Each of these two retaining members cooperates abutting with the anchoring part, forming an axial abutment opposing the separation in opposite directions of the two flanges. The fact of using two retaining members makes the connection between the flanges particularly robust (which also makes it possible, if necessary, to reduce the thickness in deformable parts of these retaining members). It will be understood that the filter element arrangement is particularly simple and three functions are combined at the level of connecting elements defined by the anchoring portion of the first flange: indexing with the second flange (no relative rotation possible), maintaining the height of the filter element (no axial spacing possible), and mechanical connection with the rotor element.
    [0006] In the foregoing and in all that follows, it is understood that the term "flange" must be interpreted extensively and can not be reduced to the single radial portion of the covering of the filter media. On the contrary, it is absolutely not excluded that the flange comprises axial extensions (see anchor part in particular) and / or radial, if necessary with an assembly of several parts. According to one feature, the sleeve comprises a conduit portion adapted to circulate a flow of gas in the interior space to or from the inner face of the filter media, the pipe portion projecting axially outwardly from the first flange . This allows the gases to be channeled without adding a specific part, the end of the pipe portion being surrounded by a dynamic seal. In particular, when the flow direction of the gases is of the centripetal type, a purified gas outlet can be provided in a cover of the purification device that integrates the dynamic seal.
    [0007] The filter element arrangement with such a pipe portion in a rotor element presents a good compromise between the pressure drop on the one hand and the efficiency of the separation on the other hand. In another feature, the two retainers extend away from the conduit portion and define second contact surfaces of the plurality of contact surfaces. In this case, the filter element is then also in mechanical connection with the rotor element via the second flange.
    [0008] In particular, it is advantageous to define an annular zone of the sleeve-second flange sealing contact, which makes it possible to avoid the use of an additional separate seal. In various embodiments of the crankcase cleaning device according to the invention, one or more of the following arrangements may also be used: the two retaining members are in contact with the portion of the crankcase gas purification device 3035336; respectively anchoring in two overlapping areas, the two retaining members each having a rigid rotational indexing portion adapted to fill one end of the N notches in the assembled state (this allows indexing surfaces to rotation which belong to the two flanges to engage with the longitudinal edges of the same notch, so that a very good distribution of torsional / shear forces between the two flanges) is obtained; each of the two retaining members has an elastically deformable lug, which extends longitudinally from the rigid indexing portion in rotation to a free end forming a stop engaged with the anchoring portion (this makes the assembly of the filter element particularly easy, and can allow to increase the rate of production). the anchoring part comprises two retaining recesses each opening radially outwards and placed respectively adjacent to two predetermined projections which define two of the engagement means, the free end of the tab having a pin which makes protruding radially inwardly from an inner face of the tab and adapted to be received in a corresponding recess of the two retaining recesses. The recess may be in the form of an opening, which is advantageous for the circulation of gases (the pressure drop is limited if the sleeve and the anchoring part which surrounds it have numerous radial openings). the two retaining members are diametrically opposed with respect to a central opening of the second flange, one or two rotational indexing portions, distinct from the two retaining members, being furthermore formed in the second flange. Thus when the number N of notches is equal to four, the mechanical connection can be made with the rotor element more robust, without complicating the assembly between the two flanges (knowing that the notches are typically indeformable, the resistance is increased the mechanical connection by increasing the contact surfaces engaged in the notches). The sleeve comprises collar portions formed in a first annular zone (which is preferably remote from the pipe portion), the collar portions making it possible to raise the longitudinal edges locally, each of the two retaining members being received, adjacent position (in particular axially adjacent) to one of the N engagement means, in one of the N notches and extending laterally from one to the other of two adjacent neck portions in the state assembled. With this type of configuration, the mechanical connection is improved and the risk of using the plastic (especially when the sleeve is metallic) is reduced. - The sleeve has an axially projecting end outwardly relative to the first flange and radial openings in a second annular zone 25 intermediate the projecting end and a transverse wall, the radial openings forming part of the pipe portion. the anchoring part comprises a pair of fingers which extend longitudinally in the interior space from a tubular portion of the first flange surrounding the central opening, whereas in the pair in question, the fingers are spaced apart by a longitudinal slot; , proximal to the central opening, one of the two retaining members extending at least in part in the longitudinal slot and being sandwiched between two adjacent neck portions (this arrangement makes it possible to limit the possibilities of displacement side of the flexible part of the retainers). The N engagement means are defined by N projections and the fingers of the pair are connected by a common end, distal to the central opening, which defines one of the N projections (the spacing between the fingers makes it possible to forming radial passage openings for the gas, without embrittlement of the sleeve due to the common termination which can be sandwiched between a retaining member and the bottom of a notch). the sleeve is metallic and further comprises a connection portion to a drive shaft, as well as a transverse wall extending between the pipe portion and the connecting portion, at least one axial orifice in the transverse wall; allowing the passage of an elongate fastener such as a screw (this allows to install in a simple manner the filter element arrangement 20 in situ, at the end of a rotating shaft). - Each of the N notches of the sleeve has a substantially flat bottom surface, N being preferably equal to four. the sleeve is metallic and has a first annular sealing surface, preferably formed by a first bead, and a second annular sealing surface, preferably formed by a second bead, each of the first and second annular surfaces of sealing being formed on said outer face on either side of N notches. the second flange, molded of plastic material, has a radial portion which covers the second axial face of the filtering medium and an inner skirt spaced from the radial portion delimiting an annular groove, knowing that in the assembled state the first annular surface is in radial contact sealing against a tubular portion of the first flange (also molded of plastic material), and the second annular surface is in radial contact sealing against an annular inner face of the inner skirt (these two zones). metal-plastic sealing limit the number of parts and thus facilitate the assembly of the filter element arrangement). the N notches open axially on the side of the second face in said assembled state, the rotor element having a shoulder coming into axial abutment against the first flange outside the interior space (with this arrangement, it is easy to on the one hand to mount the filter element on the rotor element by inserting the sleeve on the side of a first face, and on the other hand to install the filter element arrangement on a drive shaft of which the end is inserted on the side of a second face of the arrangement, furthermore a simple collar of the drive shaft makes it possible to limit the depth of insertion 20 of the drive shaft while supporting the second flask). There is also provided a device for purifying gas from an internal combustion engine casing, comprising the filter element arrangement according to the invention, this device further comprising: - a rotating drive shaft which defines an axis of rotation and has an anchoring end for fixing the rotor element with the same alignment along the axis of rotation (which coincides substantially with the central axis of the filter media); a housing which has an inlet for the untreated gas inlet, an outlet for discharging the treated gases, and a passage for the drive shaft aligned with the axis of rotation, the end of the shaft driving 3035336 10 extending into the inner space being surrounded by a connecting portion of the rotor member; and two opposed abutment means respectively formed on the drive shaft and the rotor member, preferably on the outside of the inner space, allowing the filter element to be axially locked relative to the drive shaft when the rotor member is attached to the anchor end. Another object of the invention is to provide a method of simple assembly of a filter element arrangement, making it possible to limit the risks of rupture at the level of the filtrate insert. It is proposed for this purpose a method of assembling a filter element arrangement, comprising the steps consisting essentially in: - fixing a first flange to a second flange in an interior space delimited by an inner face of a media coalescer filtering annular format, by engaging at least one retaining member belonging to the second flange with an anchoring portion of the first flange and to make integral in rotation the first and second flanges, thanks to which a filter element is obtained; - Insert into the inner space a one-piece sleeve 25 for driving in rotation of the filter element, inserting the sleeve through a central opening defined by the first flange; - Rotating the sleeve and the filter element, by engaging in N notches of an outer surface 30 of the sleeve, N spaced projections formed in the anchoring portion of the first flange which project radially inwardly from a inner face of the filter element, where N is an integer greater than or equal to two, the engagement being made upon insertion of the sleeve in a linear motion, knowing that when inserted into the interior space , the sleeve is arranged so that the N notches open axially in the direction of the second flange.
    [0009] Advantageously, there is no need for complex interconnection parts and the mechanical connections can all be made in the interior space (leaving the external face of the filter media available), without significantly reducing the cross-sectional area. gas. The contacts between the parts can be made at a distance from the pipe portion defined by the sleeve, which allows the axial section of passage defined by the sleeve to be little different from the section of the interior space (typically without reducing by two the through diameter), and preferably wider or month as wide as the section at the end of the drive shaft. BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will become apparent from the following description of several embodiments, given by way of nonlimiting examples, with reference to the accompanying drawings, in which: FIG. an exploded perspective view of a filter element arrangement according to a first embodiment according to the invention; FIG. 2 is a sectional view of the filter element arrangement of FIG. 1, with an inserted state of the rotating drive sleeve; Figure 3A is a perspective view illustrating the interconnection between the second flange and the anchoring portion of the first flange of the filter element, according to the first embodiment of the invention; Fig. 3B is a side view illustrating the interconnection of Fig. 3A, with further the rotor member inserted internally; Figure 4 is a vertical sectional view of a crankcase cleaning device which incorporates the filter element arrangement according to the first embodiment of the invention; - Figure 5 is a perspective view illustrating the first flange with two projections adapted to slide in the corresponding notches of the sleeve, according to a second embodiment of the invention; FIG. 6 is a view from below of a sleeve used in the second embodiment to cooperate with the first embodiment of the invention and adapted for the flange of FIG. 5; - Figure 7 is a schematic vertical sectional view of a crankcase purification device according to an alternative embodiment according to the invention.
    [0010] DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION In the various figures, identical references indicate identical or similar elements. With reference to FIGS. 1, 4 and 7, the separation device 10 makes it possible to separate the liquid (and possibly solid) parts from the gases coming from the internal combustion engine casing and which are directly coming from the casing. The separation device 10 is typically part of a motor subassembly with a connecting line joining the air intake. As can be seen in each of FIGS. 4 and 7, the separation device 10 is mounted at the end 11a of a shaft 11 which is directly or indirectly rotated (pinion) by any drive member 3035336 13. rotation of the timing case, such as crankshaft, camshaft or chain tensioner. The rotational drive can also be obtained by one of the members related to the distribution, such as a pulley, the high-pressure diesel pump, the alternator, the air conditioning compressor, the water pump. The drive can still be performed by an electric motor (not shown) independent of the internal combustion engine or by a hydraulic motor linked to the oil pressure. The filter element 15 has a static type separation capability, thus operating even in the absence of rotation or similar movement. This filter element 15 here consists of a filter media cartridge 20, typically having an ability to coalesce oil particles. It is mounted on the shaft 11, preferably removably, via a rotor element 18. The filter medium 20 extends longitudinally about a central axis A between a first axial face 20a and a second axial face 20b. This filter medium 20 is provided with a coalescer media. The filtering medium has an internal face 20c (on the central axis A side) which delimits an interior space 9 in which gases can circulate. A first flange 31 covers the first axial face 20a, typically being bonded thereto, and a second flange 32 covers the second axial face 20a in a similar manner. The flanges 31 and 32 may have the same diameter D which corresponds to the apparent diameter of the filter element arrangement 100. In no way limiting, the preferred form of the media 20 is annular. Other shapes, in particular forms that are partially annular and / or symmetrical with respect to the central axis A may also be used. The shape must in all cases have at least one input surface proximal to the central axis A, defined by the inner face 20c and at least one distal exit surface. The axis of rotation Y defined by the shaft 11 is typically a vertical axis in the case of Figure 4 but can also be horizontal as in the case of Figure 7; it is understood that it may have any other orientation. The rotor element 18 comprises a sleeve 19, here monobloc, which is intended to extend the shaft 11 in the longitudinal direction defined by the axis of rotation Y. The rotor element 18 may also optionally comprise elements of the rotor. sealing, assembled at one end of the sleeve and / or surrounding an outer surface portion of the sleeve 19.
    [0011] The sleeve 19 is rigid, preferably metal or based on a non-flexible plastic or composite material, and includes a connecting portion PR to the drive shaft 11. The portion PR comprises a transverse wall 19a which forms, on the opposite side to the shaft 11, the bottom of a pipe portion PC for circulating gases. The transverse wall 19a also forms the bottom of the connecting portion PR, on the side of the shaft 11. The connecting portion PR here defines a housing L delimited by a tubular end portion 21. At least 25 an axial orifice 19b is provided in the transverse wall 19a for the passage of an elongated fastener such as a screw V. Although Figures 4 and 7 show the case of a screw V separable from a threaded housing formed at the 11a end of the shaft 11, one can also provide a threaded rod at the end 11a, which cooperates with a nut. The screw head or the nut extend into the recess defined by the pipe portion PC and the sleeve 19 can thus be secured to the shaft 11 (integral in rotation and without the possibility of axial displacement). In alternatives, another method of attachment between the sleeve 19 and the end 11a can be used, using attachment members known per se (if necessary using pins or radial lugs, for example with a connection of bayonet type, which can remove the transverse wall 19a). The end 11a fills the housing L and is in radial contact with the internal face of the tubular end portion 21. The sleeve 19 has an outer face F provided with reliefs for connecting to the filter element 15 with a rotation lock. These reliefs preferably extend at least on the outside of the connecting portion PR. When the rotor element 18 is engaged in the interior space 9 against a plurality of contact surfaces SC, SC ', by the reliefs of the outer face F of the sleeve 19, the filter element 15 can rotate without relative clearance. relative to the rotor element 18. The connecting portion PR may also optionally, on its own, prevent the flow of gas towards the end 11a, for example by defining with the filter element 15 an annular sealing zone in the interior space 9. The sleeve 19 may comprise, in its portion of PC pipe, a projecting end 19c which protrudes axially outwards with respect to the first flange 31 and radial openings O Such radial openings 0 are positioned in an intermediate annular zone which extends between the end 19c and the transverse wall 19. A wide opening for the gases is defined at the end 19c, so that the The end 19c communicates in this case with an untreated gas inlet G or a flow of gas in the interior space 9 to or from the inner face 20c of the filter media 20. The end 19c communicates in this case with an untreated gas inlet G or with a GP treated gas outlet. In the nonlimiting example of Figures 1-2 and 3A-3B, the sleeve 19 has a first bead 25 forming a first annular sealing surface in radial annular contact with the first flange 31, near a central opening 33 In addition or alternatively, the sleeve 19 may define an annular sealing surface with the second flange 32. Here, the sleeve 19 has a second bead 26 forming a second annular sealing surface in radial annular contact with the second flange 32, near a central opening 34 defined by the second flange 32.
    [0012] Referring now to FIGS. 1, 3A-3B and 6, it can be seen that the outer face F has a number N of notches 22 (with N greater than or equal to two). Each of these notches 22 of the sleeve 19 has a bottom surface 23, which is preferably substantially planar. The notches 22 delimited each between two longitudinal edges B1, B2, which extend here parallel to the central axis A (in an assembled state of the sleeve 19 with the filter element 15). Although four notches 22 are provided in the example of FIGS. 1 and 3A-3B, a smaller number of notches, for example two, may be sufficient as illustrated in the cases of FIG. 6. A higher number N may also be suitable Preferably, without exceeding eight notches 22. A U-shaped section of the inner face of the notches 22, typically with two right angles, corresponds to a good compromise between the need for robustness of the sleeve 19 and the gripping effect between the surfaces. SC and SC '(here angular) and the sleeve 19. Other surface shapes with complementary profile (for example convex shape fitting into a complementary concave shape of the crank 22) are also suitable in variants of FIG. production. As clearly visible in FIGS. 1-2, the first and second annular sealing surfaces are formed on the outer face F on either side of the notches 22, to avoid any interference with the mechanical connection zone (with effect anti rotation). The interconnection between the outer face F of the sleeve 19 and at least one of the flanges 31, 32 will now be described with reference to FIGS. 1-2 and 3A-3B. Apart from a radial portion 31a or 32a covering the respective axial faces 20a, 20b of the filter media 20, each of the flanges 31 and 32 has a portion extending into the interior space 9 to structure the filter element 15 (connection inter-flanges) on the one hand, and to ensure a robust mechanical connection with the sleeve 19 on the other. To allow this mechanical connection, the filtering element 15 has a plurality of contact surfaces SC, SC '(with reliefs and typically distributed discontinuously around the central axis A) formed in the interior space 9. In reference In FIGS. 1 and 3A-3B, the first flange 31 has first contact surfaces SC (of said plurality of contact surfaces) defined by an anchoring portion 35 extending longitudinally towards the second flange 32 from the portion radial 31a (which is here substantially planar) of the first flange 31. Notches 36 are formed in the anchoring portion 35 to allow a flow of gas in a radial direction. Between two adjacent indentations 36, a radially inwardly projecting projection 38 is formed on the internal face F1 of the anchoring portion 35. The anchoring portion 35 reduces the passage section delimited by the radial portion 31a first flange 31 3035336 18 (at the opening 33 provided for the insertion of the sleeve 19 in the inner space 9). The anchoring portion can thus extend into the interior space 9 longitudinally around the sleeve 19 in an assembled state, from the radial portion 31a to an end zone that is closer to the radial portion 32a of the second flange. 32 and also contained in the interior space 9. In variants, the projections 38 are not positioned in the same circumferential zone as the indentations 36. Here, a number N of projections 38 is provided which is the same as the number of projections. Notches 22. Each projection 38 is configured to fit snugly in one of the notches 22, with the same circumferential spacing from one projection 38 to the other as for the notches 22. In the example illustrated on FIG. Figures 1 and 3A, it is understood that the projections 38 extend laterally from one to the other of the longitudinal edges B1, B2. Alternatively, one or more slots or a similar recess defined intermediately in the projection 38 may be provided. In other words, a projection 38 which cooperates with a notch 22 defined may of course be broken down into variants into at least two members. projections, one of which is engaged against a first of the longitudinal edges B1 and the other is engaged against a second of the longitudinal edges B2. In other words, the definition of the term "projection" is not restrictive and includes the case of separate members which are part of the same radially inwardly projecting engagement means. As can be clearly seen in FIGS. 1 and 3B, the sleeve 19 may optionally comprise collar portions 40 formed in an annular zone (locally enlarged zone), here remote from the PC pipe portion 3035336 19 optionally extended axially by a Narrower tubular extension 41 on which is formed the second bead 26. The tubular extension 41 defines the access opening 42 of the housing L. The neck portions 40 can locally enhance the longitudinal edges B1 and B2 relative to the bottom surface 23, which makes the mechanical connection anti-rotation effect more robust. The anchoring portion 35 may comprise one or more pairs of fingers 37a, 37b which extend longitudinally in the interior space 9, in the assembled state, from a tubular portion 31b of the first flange 31 which surrounds the opening For each pair, the fingers 37a, 37b are spaced apart by a longitudinal slot 37c, proximal to the central opening 33. The second flange 32 comprises one or more retaining members 44, 45 engaged with the part These retaining members 44, 45 which extend into the interior space 9 in the assembled state, in the direction of the central opening 33 of the first flange 31, can engage in the longitudinal slots 37c. or similar recesses which open axially towards the opening 34 of the second flange 32. The retaining member or members 44, 45 make it possible to rotate the first and second flanges 31, 32 as shown in FIGS. 3A-3B . In the nonlimiting example of FIGS. 1-2 and 3A-3B, four retaining members 44, 45 which here extend away from the portion of the pipe PC by surrounding the connecting portion PC, define second surfaces of FIG. contact SC 'for the mechanical connection with the sleeve 19. More particularly, each of the retaining members 44, 45 may comprise a rigid portion 46 of rotational indexing adapted to fill one end 22a of the notches 22 in said assembled state. The rigid portion 46 typically has two sharp edges (here by connecting adjacent faces disposed at an angle θ of 90 ° to each other, more generally and in a nonlimiting manner, two surface connections. with an angle θ not greater than 90 or 100 ° can be used to define the angular contact surfaces SC and SC '). Thus, each of the retaining members 44, 45 may be, here adjacent to one of the projections 38 (or 10 comparable engagement means), fittedly received in one of the notches 22. The retaining members 44 45 extend laterally (at least at their rigid portion 46) from one another to two adjacent flange portions 40 in the assembled state with the sleeve (see FIG. 3B). Of course, the rigid portion 46 may, where appropriate, be broken down into several sub-parts and / or engage only against one of the longitudinal edges of the associated notch 22, in particular when the number N of notches is greater than or equal to at four. In addition or alternatively, the adjustment of a projection 38 in a notch 22 can be obtained by means of one of the retaining members 44, 45, for example with a complementarity of shape between the anchoring part 35 and the retaining members 44, 45, which makes it possible to fill a notch 22 by extending from one to the other of the longitudinal edges B1 and B2. At least a portion of the retaining members 44 may further comprise a longitudinal extension in the form of an elastically deformable lug 47 clip-type. The elastically deformable tab 47 extends longitudinally 30 from the rigid indexing portion 46 in rotation to a free end 47a (typically provided with a lug 44a) forming a stop 44b engaged with a flange 49 of the part d Anchoring 35. When assembling the two flanges 31 and 32, this tab 47 allows, by spacing 3035336 21 radial outwards, a temporary overlap between the free end 47a and a 37d termination which interconnects the fingers 37a, 37b of a pair of fingers 37a, 37b, the opposite side to the central opening 33 of the first flange 31. The two flanges 31 and 32 are snapped together when the tab 47 extends between the 37d termination and the portion tubular 31b and protrudes radially inward in the longitudinal slot 37c.
    [0013] Although the figures illustrate slots 37c forming openings for gas passage in the example of the figures, with alignment between the radial openings 0 and the slots 37c and notches 36, it is more generally understood that retaining recesses (Which open radially outwardly) may allow to receive a lug 44a formed at the free end 47a of the lug 47. When the sleeve 19 is inserted into the interior space 9 through the central opening 33, This sleeve 19 is linearly displaced in the central zone delimited by the anchoring portion 35 (central zone clearly visible in FIG. 3A). During this insertion, the notches 22 are engaged by the first and second contact surfaces SC and SC '. The N notches 22 open axially on the side of the second face 20b (ie 25 towards the second flange 32 when the notches 22 have already been inserted into the interior space 9) to allow the insertion of the projection 38 first, then, for at least a portion of the notches 22, the rigid portion 46 of the retaining members 44. In other words, the rigid portion 46 30 occupy the notch 22 following the projection 38 which is defined here in the 37d termination. According to a non-limiting embodiment, the two retaining members 44 which have the elastically deformable tab 47 are typically diametrically opposed to the central opening 34 of the second flange 32. Two other retaining members 45 formed in the second flange 32 may each have substantially a rigid portion 46 rotational indexing. More generally, it is provided that one or more of the retaining members 44, 45 engages an anti-rotation relief, for example defined by a longitudinal slot 37c, of the anchoring portion 35 and optionally in one of the notches 22 alternatively, an anti-rotation slot may be formed in the second flange 32. It is also understood that the first and second contact surfaces SC and SC 'respectively used in the first flange 32. flange 31 and the second flange 32 may be reversed for all or part. Thus, in a variant of the example illustrated in FIGS. 1-4, while retaining in the second flange 32 the inner skirt 320 which is used for the sealing contact with the second bead 26 or similar sealing surface of the rotor element 18, it may be provided to use projections 38 or similar engagement means in the second flange 32 and to form retaining members 44, 45 in the first flange 31.
    [0014] Optionally, when an inner skirt 320 is provided in the second flange 32, it is spaced from the radial portion 32a by delimiting an annular groove 39. Spacers can be used to partition the annular groove 39, in order to limit the radial deformations of the inner skirt around the opening 34. This thus stiffens the inner skirt 320, which can also serve as an axial stop for a shoulder 48 provided on the shaft 11. With reference to FIGS. It will be seen that two opposed abutment means, typically in the form of radially protruding reliefs to form a shoulder or at least one axial abutment, can be respectively formed on the drive shaft 11 and the rotor element 18. These abutment means here extend outside the interior space 9, without this option being limiting. Thus in the assembled state as illustrated in FIG. 2, the rotor element 18 comprises a shoulder 18a, here integrally formed with the sleeve 19 (in a collar 19d), coming into axial abutment against the radial portion 31a. the first flange 31 outside the interior space 9. This arrangement allows the filter element 15 to be locked axially by the drive shaft 11 15 when the rotor element 18 is itself fixed to the end 11a anchor. This is advantageous since it is not necessary to provide particularly robust tabs 47 for inter-flange axial retention and / or the number of tabs 47 can be reduced (a single tab 47 can suffice). Referring to Figures 5 and 6, it can be seen that the number N of notches can be reduced to two. The anchoring portion 35 remains substantially unchanged, except for the disappearance of two longitudinal slots 37c with respect to the example of FIG. 3B, so as to form guide lugs 50 without projection 38. The forked end 50a, 50b of the guide lugs 50 may allow form complementarity with a retaining member 45 which engages axially in the passage defined by the fork 50a, 50b. In a variant with four grooves or notches 22 in the sleeve 19, the fork 50a, 50b forms a pair of lugs which protrude radially inwardly relative to the inner face F1 and the space between these lugs 3035336 24 is filled by the complementary end of a retaining member 45. The double anti-rotation inter-flange effect, and between the filter element and the sleeve 19 can then also be obtained (with a filter element structure 5 which can minimize the number of pieces). A first example of separation will now be described with reference to FIG. 4. In this case, it provides a centripetal-type filtration, for which the filter media 20 has at least one external inlet surface 53, through which the untreated gases G arrive in the upstream zone Z1, and at least one exit surface defined by the internal face 20c, through which the treated gases GP emerge. The media 20 extends between these two surfaces 53, 20c, with a thickness and a composition adapted to the desired efficiency and the tolerable pressure drop. The media 20 is of the coalescer type with, for example, a pleat arrangement of pleated straight, curved, chevron or rolled type. The filter element arrangement 100 extends into a filter chamber of a housing 60 which has an inlet for the untreated gas inlet G and an outlet S for exhausting the treated gases GP. The housing 60 has a passage for the drive shaft 11 aligned with the Y axis of rotation, the end 11a of the drive shaft 11 extending into the interior space 9 being surrounded by the connecting portion PR of the rotor element 18. To pass a fluid from the upstream zone Z1 which communicates with the crankcase to the downstream zone Z2, it is necessary to pass through the media 20 of the filter element 30 15. In the example of FIG. 4, a dynamic seal 16 in contact with the pipe portion PC forms an interface (with rotating seal) between the stator part and the rotor part, making it possible to separate the upstream zone Z1 from the zone downstream Z2. In the downstream zone Z2, the treated gas GP flows in the pipe portion PC and is deflected at least once to an outlet S which communicates with the air intake. The output S is here defined in a removable part.
    [0015] The outlet S may be defined by a conduit of a cover 61 forming part of the housing 60. The cavity or filter chamber may be opened by removing the cover 61. The dynamic seal 16 may be part of this cover 61. At least an O-ring ensures, for example, the sealing of the fastener between this cover 61 and the rest of the housing 60, in addition to the dynamic seal 16. Another dynamic seal J, placed opposite the dynamic seal 16, encloses the shaft 11 which passes through a wall P of the housing 60.
    [0016] At the inlet of the filter media 20, HG oil drops emerge whose size is large enough to withstand the centrifugal force associated with the rotation of the rotor part around the Y axis (here confused with the central axis AT). Fibers from the media 20 allow coalescence of the oil microdroplets arriving on the upstream side Z1 by interception, sedimentation, inertial impact, or brownian diffusion on the fibers, so that the oil particles must regroup to form moreover. big drops HG.
    [0017] The drops of HG oil separated from the gases are advantageously permanently rejected on the side of the unpurified gases. The drops of HG oil are evacuated simply by gravity to a drainage pipe (not shown in Figure 4).
    [0018] The rotor portion of the device 10 may include a drive link with a programmable rotational speed electric motor. The speed of rotation is thus adjustable according to the relevant parameters. The method of separating oil from crankcase gases previously described for illustrative purposes is not limiting when within the scope of the invention. Thus, those skilled in the art can also make and apply the invention to a crankcase cleaning device which uses a reverse direction of circulation, with the upstream zone Z1 (communicating with the crankcase) delimited by the space inside 9 of the filter element 15 and the zone adjacent to an inlet duct. A second example of separation with a reverse direction of circulation will now be described with reference to FIG. 7. The axis of rotation Y may be horizontal, and the downstream zone Z2 of treated gases GP which communicates with the output S may then be defined by the peripheral space around the filter element 15. In this case, it can be provided in the filtration chamber an upper zone which is adjacent to the outlet duct S (laterally offset from the filter element 15) and a low oil recovery zone.
    [0019] Here, the casing gases G enter the upstream zone Z1 through the cover 61 via the pipe portion PC. A rotary seal is provided via the dynamic seal 16 between an inlet duct of the cover 61 and the end 19c of the sleeve 19 or similar cylindrical end of the rotor element 18. In the example shown, this seal 16 and at least a portion of the pipe portion PC can separate the gas inlet passage G in the upstream zone Z1 of the discharge passage of the downstream zone Z2. In contrast to the output S, an additional dynamic seal 30 J is provided between the rotational drive end 11a and a wall P of the stator part. This wall P is typically perpendicular to the Y axis of rotation. It will be understood that the untreated gases G will follow inside the media 20 a path that moves away from the central axis A (here coinciding with the axis y of rotation) and therefore undergoes the effect of the centrifugal force inside this medium 12 when the separating member 100 is rotated. Because of the gas flow in the centrifugal direction, the oil drops HG can be pushed by the gas flow combined with the centrifugal force towards the outer surface of the filter media 20. At the outlet of this media 20, spring the treated gases GP, as well as drops of HG oil whose size is large enough to undergo the centrifugal force associated with the rotation of the rotor part about the axis A. Thanks to the centrifugal effect, the drops of HG oil of large mass are expelled radially towards the peripheral wall PP of the housing 60. The treated gases GP are guided towards a passage which diverges with respect to the path of the oil drops HG. At the distal exit surface (outer perimeter), the section of the coalescer filter medium is large, so that the treated gases GP are slowed down and can therefore more easily flow without turbulence into the downstream zone Z2. The guiding of the treated gases GP is allowed thanks to the presence of guide walls. The drops of HG oil flow essentially by gravity along the peripheral wall. The heavy phase formed by the oil drops HG effectively separates from the light phase formed by the treated gases GP and it is understood that there is no oil retraining to the outlet S. As in the case in the direction of centripetal circulation of the crankcase gases, a return to the crankcase of the drained oil 30 can be done in two ways in particular. The oil can go down via a flexible pipe or any drainage pipe 24 opening below the oil level, as illustrated in FIG. 7. Alternatively, the oil is stored in a tank forming a buffer tank which is emptied 3035336 28 stop via a flap. Moreover, optional blades can be formed on the shaft 11 and / or on a flange 31 or 32 of the filter element 15. Such aerodynamic elements 5 to create a suction effect can be placed, depending the orientation of the blades and the direction of rotation of the shaft 11, either close to the outlet S, or opposite to the outlet S. The suction thus created allows a reduction in the pressure drop of the filter element 10 at low rotational speed and high gas flow rates. Such blades may be formed integrally with the second flange 32, for example by molding. It is thus possible to provide a filter element assembly 100 of removable type with or without blades 50.
    [0020] One of the advantages of the filter element arrangement 100 is to allow a very efficient separation of the crankcase gases by reducing the pressure losses associated with the presence of oil with respect to a static coalescer, without the complexity of the design of the crankcase. rotor part which can be removable. The simplification of the device makes it possible to increase its reliability. Another of the advantages of a device according to the invention is that it can be placed outside the distribution casing, so that it is no longer subject to splashing and massive oil inflow. This results in fewer peaks of pressure loss and better evacuation of the oil. It should be obvious to those skilled in the art that the present invention permits embodiments in many other specific forms without departing from the scope of the invention as claimed. Thus, the flanges 31 and 32 can be assembled together using any suitable method of attachment, the latching corresponding to a preferred (but not limiting) option to make the assembly of the filter element 15 particularly simple.
    权利要求:
    Claims (17)
    [0001]
    REVENDICATIONS1. Filter element arrangement (100) for a device (10) for purifying a gas from an internal combustion engine casing, the arrangement comprising: - a filter element (15) having a filter media (20); ), in particular provided with a coalescer medium, extending longitudinally between a first axial face (20a) and a second axial face (20b) about a central axis (A), the filter medium having an internal face ( 20c) which delimits an interior space (9); - a rotor element (18) for the rotational drive of the filter element (15), engaged in the interior space (9) against a plurality of contact surfaces (SC, SC ') of the element filtering in an assembled state between the rotor member (18) and the filter element (15); characterized in that the rotor element (18) comprises a one-piece sleeve which extends longitudinally about the central axis (A) in the assembled state and has an outer face on which are formed N notches (22) delimited each between two longitudinal edges (B1, B2); and in that the filter element (15) comprises a first flange (31) covering said first axial face (20a) and which has a first central opening (33) allowing insertion of the sleeve (19) in the space 25 interior (9), the first flange (31) comprising an anchoring portion (35) extending in the interior space longitudinally around the sleeve (19) to a second flange (32) of the filter element, first contact surfaces (SC) spaced from said plurality of contact surfaces being defined by the anchoring portion (35) having N radially inwardly projecting engaging means for snugly engaging in the N notches (22), N being an integer greater than or equal to two, the second flange (32) comprising at least one retaining member (44, 45) engaged with the anchoring portion (35) and allowing to rotate the first and second flanges (31, 32) in rotation. 5
    [0002]
    2. Arrangement according to claim 1, wherein the second flange (32) comprises two retaining members (44, 45) spaced in engagement with the anchoring portion (35) and for making integral in rotation the first and second flanges (31, 32). 10
    [0003]
    An arrangement according to claim 2, wherein the sleeve (19) comprises a pipe portion (PC) adapted to circulate a flow of gas in the interior space (9) to or from the inner face (20c) of the media filter (20), the pipe portion (PC) protruding axially outwardly from the first flange (31), said two retaining members extending in the assembled state away from the pipe portion (PC ) and defining second contact surfaces (SC ') of said plurality of contact surfaces (SC, SC'). 20
    [0004]
    4. An arrangement according to claim 2 or 3, wherein the two retaining members (44) are in respective contact with the anchoring portion (35) respectively in two overlapping areas between the first flange (31). and the second flange (32), the two retaining members (44) each comprising: a rigid rotational indexing portion (46) adapted to fill one end (22a) of the N notches (22) in said assembled state ; and a resiliently deformable lug (47) extending longitudinally from the rigid indexing portion (46) in rotation to a free end (47a) forming an abutment engaged with the anchoring portion (35). ).
    [0005]
    5. Arrangement according to claim 4, wherein the anchoring portion (35) has two retaining recesses (37c) each opening radially outwardly and placed respectively adjacent to two projections (38) determined which define two of the engagement means, the free end (47a) of the lug (47) having a lug (44a) projecting radially inwardly from an inner face of the lug and adapted to be received in a recess corresponding of the two holding recesses (37c).
    [0006]
    6. Arrangement according to any one of claims 2 to 5, wherein the two retaining members (44) are diametrically opposed with respect to a central opening (34) of the second flange (32), one or two portions (46). ) rotational indexing, separate from the two retaining members (44), being further formed in the second flange (32).
    [0007]
    Arrangement according to any one of claims 2 to 6, wherein the sleeve (19) comprises collar portions (40) formed in a first annular zone, the collar portions for locally enhancing the longitudinal edges (B1). , B2), each of the two retaining members (44, 45) being received, adjacent to one of the N engagement means, in one of the N notches (22) and extending laterally from the to one another two adjacent flange portions (40) in said assembled state.
    [0008]
    8. An arrangement according to claim 7, wherein the sleeve (19) comprises: - an end (19c) protruding axially outwardly relative to the first flange (31); and radial openings (0) in a second intermediate annular zone between the projecting end and a transverse wall (19a), the radial openings (0) forming part of a pipe portion (PC) designed to circulate a gas flow in the interior space (9) 3035336 33 to or from the inner face (20c) of the filter medium (20).
    [0009]
    Arrangement according to claim 7 or 8, wherein the anchoring portion (35) has a pair of fingers (37a, 37b) which extend longitudinally in the interior space (9) from a tubular portion (31b). ) of the first flange (31) surrounding the central opening (33), knowing that in said pair, the fingers are spaced apart by a longitudinal slot (37c), proximal to the central opening (33), one two retaining members (44, 45) extending at least partially in the longitudinal slot (37c) and being sandwiched between two adjacent flange portions (40).
    [0010]
    An arrangement according to claim 9, wherein the N engaging means are defined by N projections (38), the fingers (37a, 37b) of the pair being connected by a common termination (37d), distal to the the central opening (33), which defines one of the N projections (38). 20
    [0011]
    An arrangement according to any one of the preceding claims, wherein the sleeve (19) is metallic and further comprises: - a portion (PR) for connection to a drive shaft (11); A transverse wall (19a) extending between a pipe portion (PC) for circulating gas and the connecting portion (PR); and - at least one axial orifice (19b) in the transverse wall (19a) allowing the passage of an elongated fastening member such as a screw (V).
    [0012]
    12. An arrangement according to any one of the preceding claims, wherein each of the N notches (22) of the sleeve (19) comprises a bottom surface (23) substantially flat, N being preferably equal to four.
    [0013]
    An arrangement according to any one of the preceding claims, wherein the sleeve (19) is metallic and has a first annular sealing surface, preferably formed by a first bead (25), and a second annular surface of sealing, preferably formed by a second bead (26), each of the first and second annular sealing surfaces being formed on said outer face (F) on either side of the N notches (22).
    [0014]
    Arrangement according to claim 13, wherein the second flange (32) has a radial portion (32a) which covers the second axial face (20b) of the filter media (20) and an inner skirt (320) spaced from the radial portion (32a) delimiting an annular groove (39), and wherein, in the assembled state: - the first annular surface is in radial sealing contact against a tubular portion (31b) of the first flange (31); and - the second annular surface is in radial contact sealing against an annular face of the inner skirt (320).
    [0015]
    15. Arrangement according to any one of the preceding claims, wherein the N notches (22) 25 open axially on the side of the second face (20b) in said assembled state, the rotor element (18) having a shoulder (18a). ) coming into axial abutment against the first flange (31) outside the inner space (9). 30
    [0016]
    16. A device (10) for cleaning a gas from an internal combustion engine casing, comprising the filter element arrangement (100) defined in any one of the preceding claims, the device further comprising : 3035336 - a rotational drive shaft (11) which defines an axis (Y) of rotation and has an anchoring end (11a) for fixing the rotor element (18) with the same alignment along the axis (Y) rotation substantially coincident with the central axis (A) of the filter medium (20); a housing (60) which has an inlet for the untreated gas inlet (G), an outlet (S) for evacuating the treated gases (GP), and a passage for the drive shaft 10 aligned with the rotation axis (Y), the anchoring end (11a) extending into the interior space (9) being surrounded by a connecting portion (PR) of the rotor element (18); and - two opposed abutment means (48, 18a) formed respectively on the drive shaft (11) and the rotor element (18), preferably outside the interior space (9), allowing the filter element (15) to be locked axially with respect to the drive shaft (11) when the rotor element (18) is attached to the anchoring end (11a).
    [0017]
    17. A method of assembling a filter element arrangement (100) according to one of claims 1 to 15, comprising the steps of essentially: - fixing a first flange (31) to a second flange (32) 25 in an interior space (9) delimited by an inner face (20c) of an annular-shaped coalescer filter medium (20), by engaging at least one retaining member (44) belonging to the second flange (32) with a anchoring portion (35) belonging to the first flange (31) 30 and making it possible to rotate the first and second flanges together, whereby a filter element (15) is obtained; - inserting into the interior space (9) a one-piece sleeve (19) for rotating the filter element (15) by inserting the sleeve through a central opening (33) defined by the first flange (31); - Rotating the sleeve (19) and the filter element (15) in rotation by engaging in N notches (22) an outer surface (F) of the sleeve (19), N spaced projections (38) formed in the anchoring portion (35) protruding radially inwardly from an inner face (F1) of the filter element (15), N being an integer greater than or equal to two, the engagement being effected during the insertion of the sleeve (19) in a linear motion, knowing that when it is inserted into the interior space (9), the sleeve (19) is arranged so that the N notches (22) open axially towards the second flange (32).
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    同族专利:
    公开号 | 公开日
    WO2016170248A2|2016-10-27|
    CN108290098B|2020-07-21|
    WO2016170248A3|2018-06-28|
    US20180104633A1|2018-04-19|
    CN108290098A|2018-07-17|
    US10478764B2|2019-11-19|
    FR3035336B1|2017-05-19|
    EP3285908A2|2018-02-28|
    EP3285908B1|2018-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2933626A1|2008-07-10|2010-01-15|Filtrauto|Gas separating device for case of internal combustion engine of road vehicle e.g. car, has liquid e.g. oil, draining channel arranged at side of treated gas downstream zone for flow of liquid passed through medium|
    EP2383029A1|2010-04-30|2011-11-02|Filtrauto|Device for oil-gas separation in a crankcase|
    WO2013067245A1|2011-11-04|2013-05-10|Cummins Filtration Ip, Inc.|Rotating separator with housing preventing separated liquid carryover|
    US5716423A|1995-12-21|1998-02-10|United Technologies Corporation|Multi-stage deoiler with porous media|
    SE527934C2|2004-06-03|2006-07-11|Alfa Laval Corp Ab|An apparatus and method for purifying a gas|
    DE102005021278B4|2005-05-09|2010-04-15|Alfa Laval Tumba Ab|Device for cleaning gas when venting a crankcase|DE102016008299B4|2016-07-06|2020-12-31|Neander Motors Ag|Oil separator for an internal combustion engine|
    CN112292193A|2018-05-24|2021-01-29|康明斯过滤Ip公司|Anti-rotation feature for crankcase ventilation filter|
    IT201800011121A1|2018-12-14|2020-06-14|Ufi Filters Spa|BLOW-BY GAS FILTRATION ASSEMBLY WITH ALIGNMENT GROUP|
    WO2020240456A1|2019-05-29|2020-12-03|Ufi Filters S.P.A.|Blow-by gas filtration assembly with support and control shaft|
    IT201900014259A1|2019-08-07|2021-02-07|Ufi Filters Spa|BLOW-BY GAS FILTRATION ASSEMBLY WITH SHAFT WITH THREADED PORTIONS|
    法律状态:
    2016-03-22| PLFP| Fee payment|Year of fee payment: 2 |
    2016-10-28| PLSC| Search report ready|Effective date: 20161028 |
    2017-03-22| PLFP| Fee payment|Year of fee payment: 3 |
    2018-03-22| PLFP| Fee payment|Year of fee payment: 4 |
    2019-03-25| PLFP| Fee payment|Year of fee payment: 5 |
    2020-03-19| PLFP| Fee payment|Year of fee payment: 6 |
    2021-03-23| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1553707A|FR3035336B1|2015-04-24|2015-04-24|DEVICE AND ARRANGEMENT WITH FILTER ELEMENT FOR SEPARATING CARTER GAS OIL FROM AN INTERNAL COMBUSTION ENGINE|FR1553707A| FR3035336B1|2015-04-24|2015-04-24|DEVICE AND ARRANGEMENT WITH FILTER ELEMENT FOR SEPARATING CARTER GAS OIL FROM AN INTERNAL COMBUSTION ENGINE|
    US15/568,640| US10478764B2|2015-04-24|2016-04-11|Device and arrangement having a filtering element for separating oil from the crankcase emissions of an internal combustion engine|
    PCT/FR2016/050826| WO2016170248A2|2015-04-24|2016-04-11|Device and arrangement having a filtering element for separating oil from the crankcase emissions of an internal combustion engine|
    EP16733127.1A| EP3285908B1|2015-04-24|2016-04-11|Device and arrangement having a filtering element for separating oil from the crankcase emissions of an internal combustion engine|
    CN201680023623.8A| CN108290098B|2015-04-24|2016-04-11|Device and arrangement with a filter element for separating oil from crankcase emissions of an internal combustion engine|
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