• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a support device (100A) for a motor provided with a housing (90), the device (100) comprising at least one support arm (20) connected to a frame, characterized in that it comprises in addition at least one mounting interface (30) adapted to be attached to the housing (90) and comprising a useful part (40) delimiting a receiving cavity (42) for the support arm (20), and means for assembly (36) of the mounting interface (30) on the housing (90).
    公开号:FR3018773A1
    申请号:FR1452383
    申请日:2014-03-21
    公开日:2015-09-25
    发明作者:Margaux Justine Dubois；Alexandre Christophe Demoulin；Arnaud Guy Laporte；Cecile Thiriet
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    [0001] Technical Field The present invention relates to a support device. More particularly, the invention relates to a support device for an engine, in particular a turbojet, adapted to be used during the manufacture or handling of the engine. The invention also relates to an assembly comprising an engine, in particular an aeronautical engine such as a turbojet, and such a support device supporting said engine. BACKGROUND OF THE INVENTION It is known to form in the outer casing of a turbomachine engine at least two diametrically opposite receiving recesses for receiving each end of a support arm integral with a frame. In the manufacture or handling of the motor, a support arm is thus introduced into each cavity and fixed to the housing, keeping the motor in a desired position. With such a configuration, to ensure a good maintenance of each arm, it is necessary that each cavity has a sufficient useful depth. To obtain such a depth, the casing is generally provided with local extra thicknesses, also called bosses, in which the reception cavities for the arms are machined. These extra thicknesses lead to a considerable increase in the weight of the engine. However, for obvious reasons of efficiency, it is desirable that the weight of the engine is minimized and, in particular, that it is not impacted by parts having no utility in operation. OBJECT AND SUMMARY OF THE INVENTION The main object of the present invention is therefore to provide a support device for an engine that allows the engine to be properly handled before use, while limiting its weight during use. According to the invention, this object is achieved with a support device for an engine provided with a housing, the device comprising at least one support arm connected to a frame, characterized in that it further comprises at least a mounting interface adapted to be attached to the housing and comprising a useful portion defining a receiving cavity for the support arm, and means for temporarily assembling the mounting interface on the housing. The mounting interface of the device according to the invention fulfills the function of the bosses of the prior art, formed directly on the housing. According to the invention, however, the mounting interface is removable. The assembly means of the interface on the housing are intended to perform a temporary assembly of these two elements. In other words, this assembly can be undone without damaging the crankcase. It is therefore possible to easily remove the mounting interface after assembly and handling operations and once the engine is in place. The material thicknesses related to the bosses can be avoided, the weight of the housing and therefore the total weight of the engine in use can be reduced. Furthermore, the machining bosses in the housing skin is no longer necessary, the manufacture of the housing is greatly simplified. Finally, the mounting interface can be made in a different material from the housing, it is possible to choose a material having a better mechanical strength. In one example, the mounting interface comprises a plate and the usable portion extends from said plate, and the assembly interface means of the mounting interface on the housing comprise at least one receiving hole for a formed screw. in said plate, preferably several receiving holes for screws regularly distributed around the useful part. Since the useful part protrudes from at least one face of the plate, the useful depth of the receiving cavity for the arm may be sufficient to ensure a good hold of the arm. The thinner thickness of the plate allows in particular the attachment of the mounting interface to the housing by means of screws. The receiving holes for the screws may be arranged to attach the screws directly to the housing skin. In another example, the mounting interface may be attached to at least one flange of the housing. In this case, for example, the plate is bent at one of its ends to form a tongue and the receiving hole 35 for a screw is formed on said tongue.
    [0002] In one example, the means for assembling the arm on the mounting interface comprise screws. For example, at least one receiving hole for a screw is formed in the mounting interface, in particular in its useful part, and at least one receiving hole for a screw is formed on the arm and adapted to be positioned next to it. the receiving hole of the mounting interface when the arm cooperates with the receiving cavity of the useful part. Preferably, a plurality of receiving holes are angularly distributed around the opening of the receiving cavity for the arm. Preferably, the support device according to the invention comprises a frame to which are connected two support arms arranged substantially face to face so as to be able to receive between them the motor housing, and two mounting interfaces adapted to cooperate respectively with a support arm. Preferably, the two arms extend in horizontal directions. Even more preferably, the two arms are substantially coaxial. The present invention also relates to an assembly comprising a motor provided with a housing and a support device as defined above, in which the arm is engaged in the receiving cavity of the mounting interface, and the interface of assembly is assembled on the motor housing removably, and the assembly comprises means for immobilizing the housing relative to the translation mounting interface at least in a direction substantially orthogonal to the axis of the support arm, to prevent the casing from falling. Thanks to the support device according to the invention, the housing can be held in position away from the ground. By leaning directly or indirectly on the support interface, itself in direct or indirect support on the arm, integral with a frame, the housing is immobilized in translation in a direction substantially orthogonal to the axis of the arm, in other words substantially vertical, preventing its fall. As indicated above, the mounting interface may for example be fixed on the housing by means of at least one fixing screw.
    [0003] In this case, the screw prevents the mounting interface is torn from the housing by a movement of the arm in the direction of its axis, away from the housing. The shear forces between the mounting interface and the housing can be taken directly by the fixing screw or screws, which are in this case shear screws forming immobilizing means. In another example, the shear forces are taken up by the mounting interface itself. In this case, the housing and the mounting interface are assembled such that an active surface of the housing rests on a complementary support surface of the mounting interface, the active surface and the support surface forming means immobilization. The screws, if any, are then mounted with a game, so that the loads are taken first by the direct support of the housing on the mounting interface.
    [0004] In one example, the housing comprises at least one rib on its outer surface and the active surface belongs to said rib. In another example, a through mounting hole is formed in the housing and the mounting interface includes a complementary shaped projection which is inserted into the mounting hole, the active surface of the housing being formed by the wall of the housing hole. mounting. According to a preferred arrangement, the mounting interface cooperates with the casing by complementarity of form. This configuration allows a better maintenance of the mounting interface when attached to the housing. In the same way, preferentially, the arm cooperates with the receiving cavity 25 of the form-fitting interface. Shear forces between the support arm and the mounting interface can be taken directly by the arm, the inner wall of the receiving cavity of the arm then being supported on the arm. In a case where the mounting interface is assembled to the arm by means of fixing screws, these screws can be mounted with a clearance so that the loads are taken up first by the direct support of the mounting interface on the arm. According to another example, these forces can be taken up by the screws fixing the arm to the mounting interface, which then form shear screws.
    [0005] Several modes or examples of embodiments are described in this presentation. However, unless otherwise specified, the features described in connection with any one embodiment or embodiment may be applied to another embodiment or embodiment.
    [0006] BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will emerge on reading the following description of exemplary embodiments of the invention given for illustrative and not limiting. This description refers to the attached drawing sheets in which: FIG. 1 is an overall view of an engine, supported by a support device according to a first embodiment of the invention; FIG. 2A shows in more detail the support device of FIG. 1, before it is fixed to the motor casing; FIG. 2B shows the cooperation between a support arm and the mounting interface of FIG. 2A once this is fixed to the motor casing; FIGS. 3A and 3B illustrate a mounting interface according to a second embodiment of the present invention, respectively exploded and in mounted position; - Figures 4A and 4B illustrate a mounting interface according to a third embodiment of the present invention, respectively exploded view and in position mounted on the housing; Figure 4C is a rear view of the mounting interface of Figures 4A and 4B. - Figure 5A shows a mounting interface according to a fourth embodiment of the invention, before mounting on the motor housing; Figure 5B is a perspective view of the rear of the mounting interface of Figure 5A; Figure 5C shows the mounting interface of Figure 5A in the mounted position on the housing; - Figure 5D is a view of the engine crankcase interior, once the mounting interface mounted on the housing; - Figure 5E is a sectional view along V-V of Figure 5C. DETAILED DESCRIPTION OF EMBODIMENTS FIGS. 1, 2A and 2B show a support device 100A according to an exemplary embodiment of the invention in cooperation with an annular casing 90 of a turbojet engine M. Such a support device 100A however applies identically to any other type of engine comprising a housing. In the example, the support device 100A comprises a frame 28, two support arms 20a, 20b connected to the frame and extending along respective longitudinal axes Xa, Xb horizontal, two interfaces or removable mounting parts 30a, 30b provided with each of a receiving cavity 42 for one of the support arms 20a, 20b, and means of temporary assembly of each interface 30 on the housing 90, here in the form of screw fixing means 34, 36. Each mounting interface 30a, 30b is intended to be disposed between the housing 90 and a support arm 20a, 20b. In the mounted position on the support device 100A, and as will be described in more detail in the following, the housing 90 is supported by the arms 20a, 20b, through the two mounting interfaces 30a, 30b. Displacement means (not shown) allow the displacement of each arm 20a, 20b, in particular along its longitudinal axis Xa, Xb. As illustrated in FIG. 1, the support arms 20a, 20b are positioned substantially face to face and so as to provide a sufficient reception space between them for the engine casing 90. In the example, more particularly, the two support arms 20a, 20b are coaxial. Each arm 20a, 20b comprises, in the example, a distal portion 22 of cylindrical constant section, here circular profile, extending from its end (see Figure 2B in particular). Each arm 20a, 20b further comprises, at a distance from its distal end, an outer collar 24 provided with fixing holes 26, the function of which will be better apparent from the remainder of this description. A mounting interface 30 according to a first exemplary embodiment of the invention is illustrated in detail in FIG. 2A. The mounting interface 30 is here a machined part, made for example of titanium or steel.
    [0007] It comprises a plate 32, here substantially rectangular, and a useful part 40, here centered on the plate 32 and protruding from the front face 32c of said plate 32. In the following, a rear face of an element is defined as a face 5 intended to be oriented, after assembly, towards the housing, and a front face as a face intended to be oriented, conversely, away from the housing. In the example, the rear face of the mounting interface 30 (in particular the rear face of the plate 32) advantageously comprises at least one shaped contact portion with a radius of curvature substantially identical to that of the skin 92 of the housing 90, so that said contact portion can come into stable support on the skin of the housing. Preferably, the contact portion constitutes the entire rear surface of the mounting interface 30. As illustrated in FIG. 2A, the plate 32 has through-receiving holes 34 adapted to receive screws 36, forming assembly means. to the casing. These receiving holes 34 are preferably evenly distributed around the useful part 40, as illustrated. As previously indicated and also illustrated in FIG. 2A, a receiving cavity 42 for a support arm 20 is formed in the useful part 40. This cavity 42 is cylindrical, of axis A substantially orthogonal to the plate 32 (ie forming an angle generally between 80 ° and 100 ° with a tangent to said plate), and of circular section, to cooperate in complementary form with the tubular distal end of the support arm 20. It opens on the front surface 40c of the useful part 40. The depth of the cavity 42, measured along its axis A, is here less than the thickness of the mounting interface 30 measured in the same direction, so that the cavity 42 forms a blind hole. According to a variant however, the cavity 42 can also be open. In the vicinity of the inlet of the receiving cavity 42, the useful part 40 is provided with a plurality of tapped holes 44 distributed angularly about the axis A. These tappings 44 and the fixing holes 26 of the corresponding arm 20 are arranged so as to be positioned facing each other when the arm 20 cooperates with the receiving cavity 42 of the useful part 40. The arm 20 and the mounting interface 30 can thus be fixed to one another by screwing, as will be described later. Figures 2A and 2B illustrate the mounting of the support device on the housing 90 of the turbojet engine.
    [0008] The housing 90 has a skin 92 of annular shape, axis B, and which project a plurality of flanges 94 extending radially outwardly. Throughout the present application, and unless otherwise indicated, is called engine axis (here the turbojet engine), the radial axis of symmetry B of the engine. The axial direction corresponds to the direction of the axis B of the engine, and a radial direction is a direction perpendicular to this axis B. When mounting the support device 100A, and as shown in Figure 2A, the mounting interface 30 is brought into abutment against the skin 92 of the casing 90 of the turbojet engine and fixed by means of fixing screws 36 introduced into the receiving holes 34 of the plate 32 and into corresponding threaded holes 96 of the skin of the casing 92. in Figure 1, the mounting interfaces 30a, 30b are attached to the housing 90 so that the axes A of their respective receiving recesses 42 are substantially horizontal. The fixing arms 20a, 20b are then introduced into the receiving recesses 42 of the mounting interfaces (FIG. 2B), and then fixed to said mounting interfaces 30a, 30b by means of screws 28 passing through their outer collar 24 and cooperating with the internal threads. of the useful part 40 (Figure 2B). In the example, the fastening screws 36 screwed directly onto the skin 92 of the casing take up the shearing forces between the casing 90 and the mounting interface 30. They therefore form means for immobilizing the casing 90 with respect to the casing 90. mounting interface 30, in a direction orthogonal to the longitudinal axis X of the arm 20 and oriented towards the ground, and thus prevent the casing 90 from falling.
    [0009] The shear forces between the mounting interface 30 and the arm 20 are taken directly by the arm 20. The screws 28 are mounted with a clearance, and serve only as security to prevent tearing in the direction of the X axis of the arm 20. The mounting interface 30 is, against against direct support on the arm 20, and is thus immobilized in a direction orthogonal to the axis X of the arm, facing the ground.
    [0010] Once the engine is fully equipped, the support device 100A is no longer necessary, and the mounting interface 30, removable, is separated from the housing 90. This step is anticipated from the development of the engine, to ensure the accessibility of interfaces and their easy disassembly, even after all the equipment has been assembled. FIGS. 3A and 3B illustrate a mounting interface of a support device 100B according to a second embodiment of the invention. The mounting interface 130 is here intended to be fixed on flanges 94 of the housing and no longer on the skin 92.
    [0011] The differences with the interface 30 of FIGS. 2A and 2B are detailed below, all the other features described in connection with these figures remaining applicable in the same manner to this second embodiment. In FIGS. 3A and 3B, the reference numerals corresponding to elements that are identical or similar to those previously described remain the same, possibly incremented by a multiple of 100, the same principle applying to all the figures of the present request. According to this second exemplary embodiment, the plate 132 of the mounting interface 130 is bent at two opposite ends, forming two tabs 151, 152 parallel and oriented in the same direction (here towards the rear of the mounting interface 130). A plurality of receiving holes 134 for screws is formed on each tab 151, 152. As shown in FIGS. 3A and 3B, the width Li of the mounting interface 130, measured between the two tabs 151, 152, is substantially equal to the spacing E1 between two successive flanges 94e, 94f of the housing 90, between which the mounting interface 130 is intended to be housed. As illustrated in FIGS. 3A and 3B, the flanges 94e, 94f of the housing 90 are provided, at the places intended to receive the mounting interfaces, with 30 receiving holes 99 for screws. The mounting interface 130 is thus attached to the housing 90 and then fixed to the housing 90 by means of fixing screws 136 introduced through the holes 99 of the flanges 94e, 94f on the one hand and through the tongues 151, 152 of the mounting interface on the other hand, and held for example by nuts 35 137.
    [0012] In this position, the central part of the plate 132 is spaced from the skin 92 of the housing 90. This allows the useful part 140 to protrude here from the rear face and from the front face of the plate 132.
    [0013] In the example, the receiving cavity 142 for the arm therefore extends on either side of the plate 132, and opens at both ends. According to alternative embodiments, however, the cavity 142 could also be plugged at the bottom and / or the useful part 140 could only protrude from one side of the plate 132.
    [0014] As in the previous embodiment, the fastening screws 136 screwed onto the flanges 94e, 94f of the casing 90 form means for immobilizing the casing 90 with respect to the mounting interfaces 130, thus preventing the casing 90 from falling. FIGS. 4A and 4B illustrate a support device 100C according to a third exemplary embodiment of the invention, in which the skin 92 of the casing 90 is provided with ribs 91e, 91f, and the mounting interface 230 is shaped to cooperate with said ribs. In the example, the housing 90 is provided with two U-shaped ribs 91e, 91f arranged so that the respective concave portions 93 of said ribs 91e, 91f are opposite one another. A receiving hole for a screw 95 is formed in each side branch of each rib 91. The mounting interface 230 of the support device 100C includes a plate 232 and a useful portion 240 projecting from the rear face of the plate. In the example, the useful portion 240 comprises a central core 260, L2 slightly smaller than the minimum spacing E2 measured axially between the two ribs 91e, 91f of the housing 90, to be positioned between the two ribs. Two tabs 262, 264 extend laterally from the central core 260.
    [0015] They are dimensioned to cooperate respectively with the concave portion 93 of a rib 91. The useful part 240 thus has a cross shape cooperating with the ribs of the housing 91e, 91f by form complementarity. The plate 232 is provided with receiving holes 234 for screws 236, on either side of each tab 262, 264. These holes 234 are arranged to face the holes 95 formed in the ribs 91e, 91f, when The mounting interface 230 is mounted on the housing 90. FIG. 4B illustrates the interface 230 in the mounted position. When the support arm is assembled on the mounting interface 230, and the housing 90 is supported by the support device 100C, the shear forces are resumed by the support of a surface 98 said active surface ribs 91e , 91f of the housing 90 on the legs 262, 264 of the mounting interface 230. In this case, the fixing screws 236 are mounted with a game, so that the loads are taken first by the direct support of the housing 90 to 10 the mounting interface 230. Figures 5A to 5E illustrate a support device 100D according to a fourth embodiment of the invention. The skin of the casing here is pierced with a mounting hole 97, and the mounting interface 330 is shaped to cooperate with said hole 97.
    [0016] The mounting interface 330 includes a plate 332, in which a plurality of receiving holes 334 are formed for attachment screws 336 of the skin mounting interface 92 of the housing 90. The interface 330 further includes protruding from the plate 332, in the center thereof, a useful portion 340 defining a receiving cavity 342 for a support arm.
    [0017] In the example, the useful part 340 has a rear projection portion 346 protruding from the rear face of the plate. This rear projection portion 346 has a shape complementary to the mounting hole 97 formed in the housing 90, here a tubular shape. In the example, the useful part 340 also has a protrusion portion before 348, in which threads 344 are formed for attachment to the support arm. Still in the example, the receiving cavity 342 for the arm, which opens on the front face 340c of the useful part 340, is plugged in the bottom. Alternatively, however, the bottom of the receiving cavity could also be open. When the support device 100D is in position, the inner wall of the mounting hole 97 is in direct abutment with the rear projection portion 346 of the mounting interface 330, which is inserted into the hole 97. The shear forces are therefore resumed by direct support of the housing 90 (through the inner wall of the mounting hole 97, forming active surface of the housing) on the mounting interface 330 (more particularly its useful part 340). As in the embodiment described above, the fixing screws 336 are mounted with a clearance, and therefore have only an anti-tearing function. In this embodiment, the opening 97 made in the housing 90 obviously requires being closed by means of a shutter, once the interface 330 dismounted and the turbojet engine fully equipped, in order to guarantee the watertightness of the housing. use. 10
    权利要求:
    Claims (9)
    [0001]
    REVENDICATIONS1. Support device (100A, 100B, 100C, 100D) for a motor with a housing (90), the device comprising at least one support arm (20, 20a, 20b) connected to a frame (28), characterized in that it further comprises: - at least one mounting interface (30, 130, 230, 330) adapted to be attached to the housing (90) and comprising a useful part (40, 140, 240, 340) delimiting a receiving cavity (42, 142, 242, 342) for the support arm (20, 20a, 20b), and - temporary assembly means (34, 36, 134, 136, 137, 234, 236, 334, 336) of the mounting interface (30, 130, 230, 330) on the housing (90).
    [0002]
    A support device according to claim 1, wherein the mounting interface (30, 130, 230, 330) comprises a plate (32, 132, 232, 332) and the useful part (40, 140, 240, 340 ) extends from said plate, and the mounting interface mounting means on the housing (90) comprises at least one receiving hole (34, 134, 234, 334) for a screw (36, 136, 236, 336) formed in said plate.
    [0003]
    A support device according to claim 1 or 2, wherein at least one receiving hole (44, 144, 244, 344) for a screw is formed in the mounting interface (30, 130, 230, 330) and at least one receiving hole (26) for a screw (28) is formed on the arm (20, 20a, 20b) and adapted to be positioned facing the receiving hole of the mounting interface when the arm cooperates with the receiving cavity (42, 142, 242, 342) of the useful part (40, 140, 240, 340).
    [0004]
    4. Support device according to any one of claims 1 to 3, comprising two support arms (20a, 20b) arranged substantially face to face so as to receive between them the motor housing (90), and two interfaces of mounting (30a, 30b) adapted to cooperate respectively with a support arm (20a, 20b).
    [0005]
    5. An assembly comprising a motor provided with a housing (90) and a support device (100A, 100B, 100C, 100D) according to any one of claims 1 to 4, wherein the arm (20, 20a, 20b) is engaged in the receiving cavity (42, 142, 242, 342) of the mounting interface (30, 130, 230, 330) and the mounting interface is removably assembled on the motor housing (90) , the assembly comprising immobilizing means (36, 96, 136, 137, 99, 262, 98, 97, 346) of the housing (90) with respect to the translation mounting interface at least in a direction substantially orthogonal to the axis of the support arm (20, 20a, 20b), to prevent the casing (90) from falling.
    [0006]
    6. An assembly according to claim 5, wherein the housing (90) and the mounting interface (230, 330) are assembled such that an active surface (98, 97) of the housing (90) is supported on a support surface complementary to the mounting interface (230, 330), the active surface and the support surface forming immobilizing means.
    [0007]
    An assembly according to claim 6, wherein the active surface (98) belongs to a rib (91) formed on the housing (90).
    [0008]
    An assembly according to claim 6, wherein a through mounting hole (97) is formed in the housing (90) and the mounting interface (330) includes a complementary shaped projection (346) which is inserted into the hole mounting (97), the inner surface of the mounting hole (97) forming an active surface.
    [0009]
    9. An assembly according to any one of claims 5 to 8, wherein the immobilizing means comprise at least one fixing screw (36, 136) of the mounting interface (30, 130) on the housing (90). .
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    引用文献:
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    法律状态:
    2016-02-24| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-14| PLFP| Fee payment|Year of fee payment: 4 |
    2018-02-02| CD| Change of name or company name|Owner name: SAFRAN AIRCRAFT ENGINES, FR Effective date: 20170719 |
    2018-02-20| PLFP| Fee payment|Year of fee payment: 5 |
    2020-02-20| PLFP| Fee payment|Year of fee payment: 7 |
    2021-02-19| PLFP| Fee payment|Year of fee payment: 8 |
    2022-02-21| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1452383A|FR3018773B1|2014-03-21|2014-03-21|SUPPORT DEVICE|FR1452383A| FR3018773B1|2014-03-21|2014-03-21|SUPPORT DEVICE|
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