• 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 present invention relates to an accessory relay capable of driving the accessory equipment of a gas turbine engine, such as an aircraft engine, comprising a housing and a plurality of gear wheels with axes parallel to each other. inside the housing, the housing comprising means for fixing the accessory equipment on the wall of the housing and for driving it by the gear wheels through openings in the wall of the housing, the wheels being supported in the housing; housing by rolling bearings each bearing comprising a first ring fixed relative to the housing and a movable ring secured to the wheel, characterized in that at least one (110) of said gear wheels is supported by a single bearing ( 120).
    公开号:FR3018860A1
    申请号:FR1452405
    申请日:2014-03-21
    公开日:2015-09-25
    发明作者:Boris Morelli；Stephane Prunera-Usach；Julien Viel
    申请人:Hispano Suiza SA；
    IPC主号:
    专利说明:

    [0001] Field of the Invention The field of the present invention is that of turbomachines, in particular that of gas turbine engines intended for the propulsion of aircraft. The invention relates to drive units of accessory equipment associated with these turbomachines, generally known as accessory relays or under the English name "accessory gear box" and its acronym AGB.
    [0002] STATE OF THE ART Part of the energy generated by the motor is used to drive various equipment of the latter. The required power is drawn off mechanically, typically from the high pressure shaft of the gas turbine engine, by a power take-off shaft that is connected to the input gear shaft in the accessory relay. The relay is mounted on the motor housing and includes a number of equipment or accessories that it supports; these are for example an electric generator, an alternator, hydraulic pumps for fuel and oil, a starter, etc. The relay comprises an elongated housing within which are mounted gear wheels forming a gear train driving the equipment. These wheels have a shaft adapted to be connected to the drive shaft of an equipment. One of the wheels is also connected to the relay input shaft. The different devices driven by the relay are mounted directly on the housing, and the associated drives pass through the wall of the housing through appropriate openings. The wheels constituting the gear train inside the housing are generally axes parallel to each other. According to the known prior art of the present applicant, the sprockets of the sprockets are supported on one side, by the wall of the housing which is opposite to that which comprises the opening through which the equipment is driven, and the other by the wall comprising the opening or a cover attached to the wall. As a rule, the shaft of the pinions of the gear wheel is carried on the one hand by the outer ring of a roller or ball bearing fixed on the uncut bottom wall of the housing and on the other hand by the outer ring of a ball bearing or roller attached to the cover associated with said accessory. The gear wheel is located between the two bearings.
    [0003] The present applicant has already proposed improvements, concerning this type of relay accessories, described for example in the applications W02012 / 175884 or EP 1.898.072.
    [0004] Such an arrangement has a certain size in the direction of the axes of the gears. As part of the continuous improvement of its products, the present applicant wishes to reduce the space requirement along said direction. It should be noted that the roller bearings have a misalignment capacity that imposes a minimum distance, this distance limits the possibility of reducing the thickness of the relays. Unless you increase the misalignment of the rollers and thus reduce their load capacity, a different solution to the assembly must be found. This is the objective set by the present applicant. DESCRIPTION OF THE INVENTION In accordance with the invention, this objective is achieved with an accessory relay capable of driving the accessory equipment of a gas turbine engine, comprising a housing and a plurality of gear wheels mainly for axes parallel to each other inside the housing, the housing comprising means for fixing the accessory equipment on the wall of the housing and for driving it by the gear wheels through openings in the wall of the housing, the wheels being supported in the housing by rolling bearings each bearing comprising a first ring fixed relative to the housing and a movable ring integral with the wheel, characterized in that at least one of said gear wheels is supported by a single bearing. , said bearing being able to take up the moments perpendicular to the axis of rotation of the gear wheel as well as the axial and radial loads.
    [0005] Thanks to the use of a rolling bearing having this property, it ensures the proper functioning of the relay while reducing its thickness because the mounting of the wheels is more compact and is no longer imposed by a minimum distance.
    [0006] According to a preferred embodiment, the rolling bearing is double row of angular contact or double row angular contact rollers. Such a bearing is known per se and allows good resistance of the accessory shaft to bending moments and axial forces for optimal space. In addition, the use of this type of bearing makes it possible to reduce the axial clearances and thus to improve the behavior of the meshing. Advantageously, the bearing is radially internal and is mounted on an axis integral with the wall of the housing. The inner ring of the bearing may be fixed or rotating, the outer ring being then rotating, respectively fixed. For at least one embodiment, the gear wheel comprises a veil provided with gear teeth at its periphery, the veil being arranged mainly in the median plane of the bearing.
    [0007] According to another characteristic, the wheel is secured to a connection axis adapted to drive a device mounted on the housing, the connection shaft being provided with a rotational drive system such as internal splines or splines external.
    [0008] The solution of the invention is preferably the majority of gear wheels which are each supported by a single bearing. BRIEF DESCRIPTION OF THE FIGURES Other features and advantages will become apparent from the following description of a non-limiting embodiment of the invention with reference to the accompanying drawings in which FIG. 1 represents in axial section a partial view of a relay of FIG. accessories of the prior art; Figure 2 shows an axial sectional view and three quarter rear part of the accessory relay according to the invention; Figure 3 shows the relay of Figure 2 seen from three quarters forward; Figure 4 shows the relay of Figure 2 seen from the side. DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION FIG. 1 shows in section an end of an accessory relay of a turbomachine according to the prior art. It consists of a housing, generally foundry and then resumed in machining, in which are mounted gears for receiving the gears used to drive one of the accessories attached to the relay accessories. In the figure are shown two gears, the first 10 is attached to the input shaft 11 in the AGB the second pinion 20 has internal grooves 12 for driving an accessory .. Once the wheels are closed. gearboxes are in place in the housing 1, the openings through which the driveways of the accessories pass are closed by covers so as to seal the assembly and to ensure the carrying of one of the bearings of the 'gear wheel shaft. In the case of the first gear 10, a cover 13 closes the opening located on the side of the input shaft 11. For the gear 20, a cover 14 closes the opening through which the first drive shaft 12 passes. note on the gears that they are carried by bearings: a ball bearing held in place by the cover closing the opening allowing the passage of the corresponding drive shaft and a roller bearing which is fixed on the wall of corresponding bottom of the housing 1, that is to say the wall opposite to that in which is made the opening passage of the corresponding shaft. The outer ring 15 of the ball bearing of the first gear 10 is thus fixed on the input shaft cover 13 by bolt-nut means while the outer ring 16 of the roller bearing of the same first gear is fixed. directly on the bottom of the housing 1, again by means of assembly 17 of the bolt-nut type. It is the same for the second gear, whose outer ring 25 of its ball bearing is fixed on the first accessory drive cover 14 while the 26 of its roller bearing is fixed on the corresponding bottom of the housing. 1.
    [0009] According to this prior art the gear wheels are thus placed between the two bearings through which the shaft is supported. This arrangement makes it possible to distribute the load between the bearings but imposes a minimum spacing between the two bearings and is sensitive to misalignment between the centering diameters of the bearings of the casing and the cover. In other cases of application the lines may use a roller bearing / roller bearing assembly. However, it is found that this arrangement requires to provide a minimum spacing between the housing walls to accommodate the wheel and the two rolling bearings on either side of the wheel.
    [0010] Figures 2 to 4 show from three different angles and in half axial section a gear wheel mounted according to the invention; The housing 101 of the accessory relay 100 according to the invention and of which only a part is visible at the level of a gear wheel 110, comprises two parallel walls 101a and 101b spaced from one another for housing the wheel 110. A wall 101a is provided with an opening through which it is possible to access the wheel. A tubular support 105 is integral with the bottom wall 101b opposite the opening of the other wall 101a and vis-à-vis thereof. The gear wheel 110 is rotatably mounted on the support 105. The wheel comprises a web 110a with peripherally geared teeth. The wheel is mounted on the tubular support by means of a rolling bearing with double row of angular contact balls. This bearing 120 comprises a double row of balls 121, angularly contact between an outer ring 122 and an inner ring 123. For example, the outer ring is in one piece and the inner ring consists of two inner half-rings arranged side-to-side. coast and axially pre-loaded against each other in service. The outer ring 122, according to this embodiment, comprises a central portion and two side portions forming two inner raceways. These tracks are made in the form of rolling grooves, of revolution around the axis of the bearing and oriented substantially back-to-back. The grooves are of arcuate radial section having their concavity radially towards the axis of the bearing and axially each laterally outwardly of the bearing on the side of the corresponding lateral part.The outer ring 122 and integral with the hub 111 of the wheel 110. Each of the inner half-rings has an outer raceway. The half-rings are symmetrical with respect to a median transverse plane. The two half-rings are pre-loaded axially against each other, to mount the bearing in the configuration of use. The outer races have the shape of rolling grooves also of revolution around the axis of the bearing, are of arcuate radial section and the concavity of each is rotated radially outwardly of the bearing and axially towards the outer raceway of the other inner half-ring. The outer races of the inner ring 123 are thus substantially disposed face-to-face.
    [0011] The balls 121 of a row are mounted in rolling contact between the outer race groove of a first inner half-ring and the inner race groove facing the outer ring 122, while the balls 121 of the other row. are mounted in rolling contact between the outer race groove of the second inner half-ring and the inner race groove facing the outer ring 122. The balls 121 are thus mounted to angular contact with respect to the median plane of the bearing and which corresponds to the plane of axial contact of the inner half-rings, when the bearing is axially pre-loaded during assembly, in the configuration of use. Where appropriate ball cages are provided between the two rings to retain the balls between the raceways.
    [0012] In this example the median plane of symmetry of the double row ball bearing and also the plane of the sail of the wheel. This arrangement has the advantage of reducing the bending moments seen by the bearing.
    [0013] The bearing is mounted on the tubular support by the inner ring 123, a nut 125 for example holds the bearing in place the inner ring being pre-loaded. According to this embodiment, the gear wheel also comprises a connection extension formed here by a tubular element 113 which can be fluted. The tubular connecting element is connected to the gear wheel 110 by a perforated transverse plate 115 with a central orifice making it possible to give access to the nut 125 for clamping the bearing. In the example shown in the figures, the opening is closed by a cover that no longer supports a bearing.
    [0014] The arrangement presented above makes it possible to significantly reduce the width of the casing of the power transmission by using a set of pinions supported by single bearings. These bearings make it possible to absorb at the same time the axial, radial forces and the moments of tilting around axes perpendicular to the axis of rotation of the wheel. The rolling bearing shown in the figures is double row of angular contact balls. According to another embodiment not shown the bearing is double row of rollers oblique contacts.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. An accessory relay for driving accessory equipment of a gas turbine engine, such as an aircraft engine, comprising a housing and a plurality of gear wheels within the housing, the housing comprising means for fixing the accessory equipment on the wall of the housing and for driving it by the gear wheels through openings in the wall of the housing, the wheels being supported in the housing by rolling bearings, each bearing comprising a first ring fixed relative to the housing and a movable ring secured to the wheel, characterized in that at least one (110) of said gear wheels is supported by a single bearing (120).
    [0002]
    2. Accessory relay according to claim 1, wherein the rolling bearing (120) is double row of balls (121) to angular contact.
    [0003]
    3. Accessory relay according to claim 1 wherein the rolling bearing is double row of rollers angular contact.
    [0004]
    4. Accessory relay according to claim 1, 2 or 3, the fixed ring (123) of the rolling bearing (120) is radially inner and mounted on an axis (105) integral with the wall (101b) of the housing.
    [0005]
    5. Accessory relay according to the preceding claim, the wall supporting the axis (105) is on the opposite side to the wall having the opening.
    [0006]
    6. Accessory relay according to one of the preceding claims wherein the gear wheel (110) comprises a web provided with gear teeth at its periphery, the sail being arranged mainly in the median plane of the bearing.
    [0007]
    7. Accessory relay according to one of the preceding claims wherein the wheel is secured to a connection axis (113) adapted to drive a device mounted on the housing.
    [0008]
    8. Accessory relay according to the preceding claim wherein the connection axis (113) is provided with internal or external splines.
    [0009]
    9. Accessory relay according to one of the preceding claims wherein the majority of the gear wheels is supported by a single bearing.
    [0010]
    10.Turbomachine equipped with an accessory relay according to one of the preceding claims.
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP3119995B1|2018-05-02|
    CN106460551A|2017-02-22|
    RU2016137322A3|2018-10-11|
    US20170122214A1|2017-05-04|
    CN106460551B|2017-12-29|
    EP3119995A1|2017-01-25|
    US10247107B2|2019-04-02|
    RU2684865C2|2019-04-15|
    WO2015140476A1|2015-09-24|
    RU2016137322A|2018-04-23|
    FR3018860B1|2021-10-15|
    CA2941804A1|2015-09-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2002053403A2|2001-01-02|2002-07-11|Beasley Leslie R|Motor assembly with independent motor units|
    JP2006009929A|2004-06-25|2006-01-12|Koyo Seiko Co Ltd|Bearing device for supporting pinion shaft|
    EP1898072A1|2006-08-29|2008-03-12|Snecma|Drive device for the rotor of an auxiliary equipment of a turbine engine|
    DE102011101197A1|2011-05-11|2012-11-15|Rolls-Royce Deutschland Ltd & Co Kg|Aircraft gas turbine engine for use with auxiliary accessory drive, has engine shaft that is operatively connected to fluid pump, where fluid pump is connected with component through supply line and return line|FR3064306A1|2017-03-27|2018-09-28|Safran Transmission Systems|RELAY ACCESSORIES FOR GAS TURBINE ENGINE|US3517574A|1968-07-12|1970-06-30|Edward William Glatfelter|Two-speed drive for power tool|
    US3889780A|1974-09-09|1975-06-17|Gen Motors Corp|Grease retainer for engaged splines|
    US4082139A|1977-02-24|1978-04-04|General Motors Corporation|Regenerator drive assembly|
    US4743776A|1986-09-02|1988-05-10|Sundstrand Corporation|Starter-generator for engines|
    EP0945624B1|1998-03-26|2002-07-31|TCG UNITECH Aktiengesellschaft|Coolant pump|
    RU2162158C1|1999-12-24|2001-01-20|ГОСУДАРСТВЕННОЕ УНИТАРНОЕ ПРЕДПРИЯТИЕ ТУШИНСКОЕ МАШИНОСТРОИТЕЛЬНОЕ КОНСТРУКТОРСКОЕ БЮРО "СОЮЗ" Военно-промышленный комплекс "МАПО"|Aircraft gas turbine engine accessory drive box|
    WO2003004907A1|2001-07-06|2003-01-16|The Gates Corporation|Fan idler pulley|
    US20060107787A1|2004-11-22|2006-05-25|Honeywell International Inc.|Adjustable gear position arrangement for synchronization of multiple generators|
    BRPI0621383B1|2006-02-27|2019-12-03|Hispano Suiza Sa|an assembly comprising a gas turbine gearbox and at least one starter / generator, gas turbine, aero-engine, gas turbine auxiliary power group, and starter / generator module|
    FR2960612B1|2010-05-25|2012-06-22|Snecma|GEARBOX IN A TURBOMACHINE|
    FR2976976B1|2011-06-24|2013-06-28|Snecma|RELAY ACCESSORIES WITH ENHANCED LIFETIME|
    CN102269059B|2011-07-27|2013-12-25|中国航空动力机械研究所|Accessory case transmission device and aircraft engine comprising same|
    DE102012018603A1|2012-09-20|2014-03-20|Rolls-Royce Deutschland Ltd & Co Kg|Accessory gearbox device|
    FR3007462B1|2013-06-21|2017-11-24|Hispano-Suiza|TURBOMACHINE ACCESSORY BOX EQUIPPED WITH CENTRIFUGAL PUMP|
    FR3008462B1|2013-07-10|2016-12-23|Hispano Suiza Sa|INTEGRATION OF A GEAR TRAIN IN A DRIVE GEAR FOR DRIVE HOUSING FOR TURBOMACHINE|
    FR3031786B1|2015-01-19|2018-11-02|Safran Transmission Systems|INTEGRATION OF A PUMP IN FUT OF PINION|FR3007462B1|2013-06-21|2017-11-24|Hispano-Suiza|TURBOMACHINE ACCESSORY BOX EQUIPPED WITH CENTRIFUGAL PUMP|
    FR3035446B1|2015-04-27|2019-08-02|Safran Helicopter Engines|TURBOMOTEUR ENCASTRABLE IN A REDUCING HOUSING|
    US10508727B2|2016-08-31|2019-12-17|Spx Flow, Inc.|Drive system and drive sub-assembly for driving a shaft|
    CN109861450B|2017-11-30|2021-08-27|日本电产株式会社|Gear box, gear motor and electric product comprising gear motor|
    CN109630276B|2018-12-10|2020-02-04|中国航发南方工业有限公司|Transmission box body|
    法律状态:
    2015-03-16| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-02| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-15| PLFP| Fee payment|Year of fee payment: 4 |
    2017-08-25| CD| Change of name or company name|Owner name: HISPANO-SUIZA, FR Effective date: 20170725 |
    2018-02-20| PLFP| Fee payment|Year of fee payment: 5 |
    2019-02-20| PLFP| Fee payment|Year of fee payment: 6 |
    2020-02-20| PLFP| Fee payment|Year of fee payment: 7 |
    2021-02-19| PLFP| Fee payment|Year of fee payment: 8 |
    2022-02-18| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1452405A|FR3018860B1|2014-03-21|2014-03-21|ACCESSORY RELAYS FOR GAS TURBINE ENGINES|FR1452405A| FR3018860B1|2014-03-21|2014-03-21|ACCESSORY RELAYS FOR GAS TURBINE ENGINES|
    CN201580014930.5A| CN106460551B|2014-03-21|2015-03-19|Accessory Gear Box for gas-turbine unit|
    US15/127,169| US10247107B2|2014-03-21|2015-03-19|Accessory gearbox for gas turbine engine|
    PCT/FR2015/050686| WO2015140476A1|2014-03-21|2015-03-19|Accessory gearbox for gas turbine engine|
    CA2941804A| CA2941804A1|2014-03-21|2015-03-19|Accessory gearbox for gas turbine engine|
    RU2016137322A| RU2684865C2|2014-03-21|2015-03-19|Accessory gearbox for gas turbine engine and gas turbine engine|
    EP15725701.5A| EP3119995B1|2014-03-21|2015-03-19|Accessory gearbox for gas turbine engine|
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