• 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 an annular cover for recovering lubricating oil for a turbomachine equipment (1), said cover (5) being configured to extend around said equipment (1) and to be secured to at least one rotating part. (3a) of said equipment, and having orifices (8) radial through oil passage by centrifugation, characterized in that it comprises means (10) for guiding radially outwardly, oil leaving said orifices (8). The invention also relates to a turbomachine equipment comprising this hood and a turbomachine module comprising this equipment and a housing with an annular oil recovery gutter.
    公开号:FR3020658A1
    申请号:FR1453919
    申请日:2014-04-30
    公开日:2015-11-06
    发明作者:Catherine Pikovsky；Benoit Guillaume Farvacque
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION AND PRIOR ART The present invention relates to the field of lubricating aircraft engines. It relates more particularly to an oil recovery device which has been used by equipment comprising a rotating part. For example, a turboprop propeller with contra-rotating propellers can incorporate a gearbox in a bearing lubrication chamber. This enclosure is arranged to guide the oil leaving the equipment it contains to storage means. In addition, it is generally in communication with an air de-oiler present in the oil circuit.
    [0002] The reduction gearbox (hereinafter referred to as the Power Gear Box) requires a very large amount of oil, ie more than half the total flow of oil passing through the engine enclosure. lubrication. In addition, the PGB has a rotating gear system. According to the state of the art, an annular cover extends around the PGB and is rotatably connected to a rotating part of the PGB, so that the cover rotates itself at a high speed. The oil that has lubricated the PGB comes out at the periphery, through holes in the outer cover of the PGB. The oil passes through these orifices by centrifugation and forms a highly dispersed jet in rotation which will splash in large quantities all the walls of the recovery chamber around the PGB. Due to the large amount of oil and the dispersion of splash, the oil leaving the BMP can cause recovery problems to the oil evacuation means of the enclosure. It may, for example, fail to evacuate, which may fill the enclosure and leak through the joints and thus to send oil in fire zones or drown the PGB.
    [0003] The object of the present invention is to propose a simple solution for efficiently recovering the oil flow coming out of equipment, in particular rotating equipment in a lubrication chamber.
    [0004] DESCRIPTION OF THE INVENTION For this purpose, the invention relates to an annular lubricating oil recovery cowl for a turbomachine equipment, said cowl being configured to extend around said equipment and to be integral with at least a part rotating said equipment, and having radial through holes for passing oil by centrifugation, characterized in that it comprises radially outwardly guiding means, oil exiting said orifices. The oil coming out of the orifices is thus efficiently guided towards a restricted zone, which allows a better recovery of the oil and avoids spraying of any other elements present around the equipment with the oil having lubricated the equipment. . Especially when the equipment is confined in an enclosure, it prevents the oil from spraying an extended area of the inner walls of the enclosure and splashes or trickles on other elements such as bearings, seals or tubes de-oiler.
    [0005] Advantageously, the means for guiding the oil leaving each orifice comprise a tube. The presence of the tubes makes it possible, among other things, to increase the coefficient of entrainment of the oil and thus to reduce the flaring of the projected jet towards the wall of the enclosure. This decreases the size of the area where this oil is to be recovered. Preferably, the tubes extend radially outwardly from the hood and are inclined in the same transverse plane and in the same direction about an axis of revolution of the hood. Advantageously, in this case, the hood is configured so that the direction in which the tubes are oriented corresponds to the direction of rotation of the cover on the equipment in operation. In this way, the orientation of the tubes increases the tangential component of the oil projected on an oil recovery wall. It can thus form a rotating oil ring that will be more easily guided to an exhaust port. The invention therefore also relates to an assembly comprising a turbomachine equipment and a hood thus configured.
    [0006] The invention also relates to a turbomachine module, comprising an assembly formed of the equipment and the cover and an annular casing extending around at least a portion of said cover and comprising on its radially inner face at least one gutter annular oil recovery.
    [0007] By definition, the gutter has sidewalls surrounding a cylindrical surface forming the bottom wall. This bottom wall is placed in front of the oil jets exiting the bonnet openings to intercept them. The side walls allow to recover the splash of the oil jet hitting the bottom wall to confine the oil in the gutter.
    [0008] Preferably, the channel comprises two lateral annular walls which advantageously deviate from one another radially outwards. In this way, the inlet section of the gutter for the oil ejected from the bonnet openings is smaller than the surface of the bottom wall intercepting the jet of oil. This limits the possibility that splashing oil out of the gutter and this allows better guidance of the rotating oil ring in the gutter to be able to then evacuate.
    [0009] The invention also relates to such a module in which the housing defines at least a portion of a lubrication chamber of an element of the turbomachine.
    [0010] Advantageously, the gutter comprises an annular bottom wall having at least one discharge orifice, preferably located at the lowest point of the gutter. The location of the exhaust port can be worked to break the oil ring and to recover the fluid more easily. Preferably, the transverse plane in which the tubes extend corresponds to a maximum radius of the annular housing.
    [0011] The housing may comprise at least one other orifice located outside the gutter, said at least one other orifice and said at least one discharge orifice being connected to common or separate discharge means, directly at the crankcase. or in another housing with a higher radius. This makes it possible to communalize the pumps for driving the oil recovered in the enclosure from the rotating equipment and the other equipment contained in the enclosure. The invention also relates to a turbomachine comprising such a module, equipment or hood.
    [0012] BRIEF DESCRIPTION OF THE FIGURES: The present invention will be better understood and other details, characteristics and advantages of the present invention will emerge more clearly on reading the description of a nonlimiting example which follows, with reference to the appended drawings in which: FIG. 1 schematically shows a turbomachine module according to the invention, this module comprising a rotating equipment, an annular cover and an annular housing, here in section along a half-plane passing through the axis of rotation of the equipment. FIG. 2 is a diagrammatic front view of the cover and the annular housing of FIG. 1. FIGS. 3a, 3b and 3c show schematically a first variant embodiment of an annular housing according to the invention, seen from the front, in section axial and from above for the lower part of the housing. Figures 4a, 4b and 4c show schematically a second embodiment of an annular housing according to the invention, seen from the front, in axial section and from above for the lower part of the housing. Description of an Embodiment: FIG. 1 represents a turbomachine equipment 1, which is mounted in an enclosure and rotatable about an axis A. As can be seen in the figure, the radial space requirement of the 1 is generally substantially less than the space defined by the internal walls of the enclosure, which are formed by at least one annular casing 2 extending around the equipment 1. In the example presented, this equipment 1 is a BMP. An oil inlet, not shown in the figure, brings oil into the central region of the PGB to lubricate it. This oil centrifugally traverses various active parts of the PGB containing gears. These parts are diagrammatically represented in the figure by internal active parts 3a and 3b rotating in one direction, surrounded by an external active part 4, contrarotative.
    [0013] In this example, in the case of a PGB with an epicyclic gear train, the innermost part 3b represents a planetary input shaft in the form of a gear wheel, which is mounted by a spline connection on the turbine shaft rotating in a direction of rotation driving the PGB. Part 3a shows a satellite carrier supporting satellites, for example three in number, which mesh around the input shaft 3b. The outer portion 4 represents an outer ring which meshes with the satellites. The dimension ratios between the different elements are arranged here so that the outer ring 4 rotates in the opposite direction of the input shaft 3b, the satellites rotating relative to the planet carrier 3a and driving it, in this case, rotation in the same direction as the input shaft 3b but with a different speed. This brief description illustrates the fact that, in such a device, many parts are in contact with relative movements and significant forces, which requires a large amount of oil for lubrication. The entire PGB is confined in a rotating external annular hood. This cover 5 is secured to the internal active part 3a and therefore rotates in the opposite direction to the external active part 4 of the PGB. The cover 5 extends around and away from the active part 4 to form an internal cavity 6 which serves, among other things, to receive the lubricating oil coming out of the PGB. The oil having lubricated the active parts 3a, 3b and 4 of the PGB 1 can exit through different paths 7a, 7b, 7c. The outer cover 5 is shaped to guide the oil from these different paths to the outlet ports 8. These orifices 8 are preferably located in a zone of maximum radius of the cover 5 to promote the discharge of the oil by centrifugation. In addition, they are in general several, their number varying for example from eight to seventy-five. They are preferably uniformly distributed circumferentially in a plane P perpendicular to the axis of rotation A. As shown in FIG. 1, the oil leaving the PGB 1 is ejected essentially radially through the orifices 8. However, various phenomena cause the dispersion of the output stream. First, the different paths 7a, 7b, 7c of the oil in the cavity 6 do not reach the orifice 8 with the same incidence. In addition, the interaction effects of the oil flow with the edges of the orifice 8 can deflect the outflow. According to the invention, a tube 10 is installed at the outlet of each orifice 8 on the face external of the cover 5 of the PGB 1. The section of this tube 10 corresponds here to that of the orifice 8 and we take advantage of the space between the cover 5 and the casing 2 of the enclosure to give a radial extension to the tube 10, bringing its outlet of the inner face of the casing 2 without touching it. Finally, as shown in the axial section of Figure 1, these tubes 10 are substantially oriented in the plane P transverse to the axis of rotation A. Their cross section is substantially constant along their radial extension. The tubes 10 may have been reported on the outer wall of the cover 5, being fixed by welding or brazing. They can also come from material with the cover 5, forming with it a one-piece assembly. Furthermore, it takes advantage of the remaining space between the inner face of the housing 2 and the outlet of the tubes 10 to provide, on the inner face of the housing 2, a gutter 13 annular located in the same plane P. The annular gutter 13 s extends around the axis of rotation A. The annular groove 13 comprises two lateral annular walls 11, symmetrical with respect to the plane P and an annular bottom wall 12. Advantageously, the shape of the housing 2 in the vicinity the plane P and that of the bottom wall 12 are substantially circular in cross section. This ensures that the ends of the tubes 10 of the cover 5 are at a constant distance from the gutter 13 during their rotation. Advantageously, the plane P is at the maximum radius, so that the recovery of the oil is done more easily. In axial section, in FIG. 1, the inner peripheral edges of the lateral annular walls 11 define between them an annular opening of the trough 13, which is radially aligned with the outlets (radially outer ends) of the tubes 10. The opening has a width or axial dimension substantially equal to or slightly greater than the diameter of the tubes 10, which are preferably substantially equal. As in the example shown, the side walls 11 deviate or diverge from one another radially outwards. They delimit between them the bottom wall 12, their internal faces being oriented towards this bottom wall 12. This bottom wall 12 is formed on the example by a portion of the inner wall of the casing 5 to which the annular walls are fixed. In this case, the side annular walls 11 may have been attached to the inner wall of the casing 2, being fixed by welding or soldering. They can also be made of material with the casing 2, forming with it a one-piece assembly. As is illustrated in FIG. 1, the oil leaving in different directions around the transverse plane P at the outlet of the orifices 8 first encounters the internal walls of the tubes 10. Depending on the paths taken, the reflection may reflect the oil directly to the bottom wall 12 of the gutter 13. The direction of the oil flow can be all the more parallel to the plane P after reflection that the edges of the tubes 10 give a strong radial pulse, driven by the rotation of the outer cover 5. As can be seen for certain paths 7a, 7b, the reflection of the oil on the walls of the tubes 10 may not be sufficient to direct it towards the bottom wall 12 of the gutter 13. In this case, it is the walls side 11 which intercept the oil and the return to the bottom wall 12. The inclined shape of the walls 11 may also have an additional function, not shown in the figure, to capture the splash of oil jets directly impacting the wall of In this way, with the tangential pulse printed by the rotation of the cover 5, a rotating ring of oil can be formed against the bottom wall 12 of the channel 13. The oil is thus channeled. and pressed against the bottom wall 12 of the gutter 13 by the centrifugal force. With reference to FIGS. 3a and 4a, this makes it possible to recover the oil by placing a discharge orifice 14 in the lowest point of the bottom wall 12. With reference to FIG. 2, this rotation effect can be improved. of the oil ring by tilting the tubes 10 in the direction of rotation w of the cover 5 when the PGB operates with respect to the radius in the transverse plane P. With reference to FIGS. 3a and 4a, an orifice 14 is placed in the bottom wall 12 of the gutter and communicates with a recovery line 15, itself communicating with a pump, not shown, to drive the recovered oil. This pipe 15 forms with the pump a means for discharging the oil recovered in the gutter 13. Using the example of the PGB 1 in a contra-rotating turboprop, the rotation axis A of the PGB 1, corresponding to that turboprop, is generally substantially horizontal. The recovery orifice 14 is then located in the lower part of the channel 13 so that the oil can flow there by gravity, in particular when the turboprop is stopped. By analogy with the dial of a clock, it can be said that the orifice 14 is located at 6 o'clock (6 o'clock) about the axis A. The location of the discharge orifice 14 makes it possible to have a shape general to force the evacuation of the oil and so that there is accumulation of oil forming a ring. Moreover, with reference to FIGS. 3b and 4b, the enclosure generally contains other equipment, not shown, such as shaft guide bearings. The low point of the gutter 13 is generally also the low point of the enclosure, orifices 16 are formed in the walls of the housing 2 to evacuate the oil from these equipment and flowing on the inner walls of the enclosure . The drainage holes 16 and 14 are advantageously placed at the largest radius of the annular casing 2, so that the oil is entrained by gravity. In a first variant, illustrated in FIGS. 3a to 3c, the orifices 16 are made. in the walls of the housing 2 outside the side annular walls 11 of the channel 13 which stop the oil from other equipment. These orifices 16 correspond to lines 17 opening into the lubrication chamber. These pipes 17, with advantageously dedicated pumps, not shown on which they are connected, form means for removing oil from other equipment than the PGB. In this first variant, the orifice 14 of the channel does not communicate with the or openings 16 of the casing 2, outside the channel 13. The pipes 15, 17 respectively connected to these orifices 14, 16, advantageously correspond to therefore to independent or separate evacuation means. It would be possible to combine the pipes 15 and 17 before connecting the recovery pump.
    [0014] In a second variant, illustrated in FIGS. 4a to 4c, the orifices 16 of the casing 2 outside the gutter are placed in communication with the pipe 15 through which the oil coming from the gutter 13 passes. This can be achieved by means of a small collecting cavity 18, opening into the low point of the housing 2 and whose axial extension is greater than the width of the bottom wall 12 of the gutter.
    [0015] The orifices 14, 16 in the bottom wall 12 of the gutter and in the casing 2 outside the gutter 13 are formed by the opening of this collecting cavity 18 in the casing 2 and are separated by the side walls 11 of the gutter 13. The pipe 15 opens into the bottom of this collecting cavity 18.
    [0016] It would also be possible for the evacuation holes 16 to be on a casing different from that where the evacuation holes 14 are located. Thus, the oil leaving the PGB would be evacuated through the evacuation hole 14 which would fall into an area 18, on another housing. In this zone 18, the oil of the PGB and the other elements would mix and evacuate via the pipe 15.30 This arrangement allows a communalisation of the pumps driving the oil recovery. The implementation of the invention was detailed in the case of the installation of a PGB in a turboprop, but it goes without saying that it can be implemented for the recovery of lubricating oil in a rotating equipment any inside an enclosure.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Annular cover for recovering lubricating oil for a turbomachine equipment (1), said cover (5) being configured to extend around said equipment (1) and to be secured to at least one rotating part (3a) of said equipment , and having orifices (8) radial through oil passage by centrifugation, characterized in that it comprises means (10) for guiding radially outwardly, oil exiting said orifices (8).
    [0002]
    2. Hood according to the preceding claim, characterized in that the means (10) for guiding the oil out of each orifice (8) comprise a tube.
    [0003]
    3. Cover according to the preceding claim, characterized in that the tubes (10) extend radially outwardly from the cover (5) and are inclined in the same transverse plane (P) and in the same direction around an axis (A) of revolution of the hood.
    [0004]
    4. An assembly comprising a turbomachine equipment (1) and a cover (5) according to one of the preceding claims.
    [0005]
    5. Turbomachine module, comprising an assembly according to the preceding claim and an annular housing (2) extending around at least a portion of said cover (5) and comprising on its radially inner face at least one annular gutter (13). oil recovery.
    [0006]
    6. Module according to the preceding claim, wherein the channel (13) comprises two lateral annular walls (11) which advantageously differ from each other radially outwardly.
    [0007]
    7. Module according to claim 6, wherein the housing (2) defines at least a portion of a lubrication chamber of an element of the turbomachine.
    [0008]
    8. Module according to the preceding claim, wherein the channel (13) comprises an annular bottom wall (12) having at least one orifice (14) for evacuation, preferably located at the lowest point of the gutter (13). .
    [0009]
    9. Module according to the preceding claim, wherein the housing (2) comprises at least one other orifice (16) located outside the channel (13), said at least one other orifice (16) and said at least one exhaust port (14) being connected to common or separate discharge means (15) directly at the housing (2) or in another housing with a higher radius.
    [0010]
    10. Turbomachine comprising a cover (5) according to one of claims 1 to 3, an assembly (5, 1) according to claim 4 or a module (5, 1, 2, 13) according to one of claims 5 to 9.
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    BR112016025018B1|2022-02-01|
    CN106460667B|2018-08-31|
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    US20170051823A1|2017-02-23|
    WO2015166189A1|2015-11-05|
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    法律状态:
    2015-04-14| PLFP| Fee payment|Year of fee payment: 2 |
    2015-11-06| PLSC| Publication of the preliminary search report|Effective date: 20151106 |
    2016-04-12| PLFP| Fee payment|Year of fee payment: 3 |
    2016-05-06| RM| Correction of a material error|Effective date: 20160404 |
    2017-04-06| PLFP| Fee payment|Year of fee payment: 4 |
    2017-11-10| CD| Change of name or company name|Owner name: SNECMA, FR Effective date: 20170713 |
    2018-03-22| PLFP| Fee payment|Year of fee payment: 5 |
    2019-03-25| PLFP| Fee payment|Year of fee payment: 6 |
    2020-03-19| PLFP| Fee payment|Year of fee payment: 7 |
    2022-01-07| ST| Notification of lapse|Effective date: 20211205 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1453919A|FR3020658B1|2014-04-30|2014-04-30|LUBRICATION OIL RECOVERY HOOD FOR TURBOMACHINE EQUIPMENT|
    FR1453919|2014-04-30|FR1453919A| FR3020658B1|2014-04-30|2014-04-30|LUBRICATION OIL RECOVERY HOOD FOR TURBOMACHINE EQUIPMENT|
    US15/306,969| US10364881B2|2014-04-30|2015-04-29|Turbine engine module comprising a casing around a device with a cover for recovering lubricating oil|
    RU2016144478A| RU2688048C2|2014-04-30|2015-04-29|Gas turbine engine module comprising crankcase around unit with casing for lubing oil recuperation|
    BR112016025018-4A| BR112016025018B1|2014-04-30|2015-04-29|Turbomachine module comprising a crankcase around equipment with a lubricating oil recovery hood|
    EP15723276.0A| EP3137755B1|2014-04-30|2015-04-29|Turbine engine module comprising a casing around a device with a cover for recovering lubricating oil|
    CN201580023426.1A| CN106460667B|2014-04-30|2015-04-29|It include the turbogenerator module around the shell of the equipment with the lid for recycling lubricating oil|
    CA2946958A| CA2946958A1|2014-04-30|2015-04-29|Turbine engine module comprising a casing around a device with a cover for recovering lubricating oil|
    PCT/FR2015/051162| WO2015166189A1|2014-04-30|2015-04-29|Turbine engine module comprising a casing around a device with a cover for recovering lubricating oil|
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