• 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 a power transmission (5) provided with at least one lubrication system (20), comprising a lubrication pump (25). The lubrication pump (25) is in fluid communication with a fluid circuit (30) opening on at least one projection means (40). Said power transmission (5) comprises an emergency reservoir (50) adapted to contain a lubricating fluid (200), said emergency reservoir (50) being in fluid communication with said fluid circuit (30), said reservoir pump (50) being connected by at least one line (60) to the fluid circuit (30) upstream of each spraying means (40), said lubricating fluid (200) being moved in the fluid circuit (30) to each means projecting (40) by a gas (300) which is set in motion by said lubricating pump (25) in case of leakage of said lubricating liquid (100).
    公开号:FR3037355A1
    申请号:FR1501213
    申请日:2015-06-11
    公开日:2016-12-16
    发明作者:Charles Louis
    申请人:Airbus Helicopters SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a power transmission gearbox, as well as to an aircraft equipped with such a power transmission gearbox.
    [0002] In particular, a rotorcraft-type aircraft comprises a rotor participating at least partially in the lift of this aircraft. A helicopter-type rotorcraft can thus include a rotor called "main rotor" to ensure its lift and propulsion. To rotate such a rotor, a rotorcraft is provided with a power plant having at least one motor. In addition, a power transmission can be interposed between the motors and a rotor to transmit the power developed by the motors to the rotor. The power transmission gearbox has the particular function of driving the rotor at a low speed of rotation compared to the high speed of rotation of the motors. By way of illustration, a turbine engine has a working shaft rotating at a speed of the order of several tens of thousands of revolutions per minute, the rotor rotating at a speed of the order of 300 revolutions. only per minute. Thus, a helicopter is provided with at least one engine setting in motion at least one main rotor by a main power transmission gearbox. A known power transmission box has a motor input mechanical drive system. Each mechanical input drive system is set in motion by a motor. In addition, the mechanical input drive systems jointly drive a wheel sometimes called "ferris wheel". The large wheel sets at least one speed reduction stage to drive a rotor through gears. Gear assemblies in the main power transmissions boxes of helicopters require permanent lubrication, possibly degraded due to certain failures. Therefore, a power transmission box includes a main lubrication system. Such a main lubrication system includes a lubrication pump. For example, the large wheel can be secured in rotation with a wheel setting the lubrication pump in motion. The lubrication pump then transfers a lubricating liquid from a bottom of the power transmission box to main projection means. The main projection means may comprise nozzles for example.
    [0003] Lubricating fluid taken from the bottom of the power transmission is usually hot. As a result, a lubrication system may comprise a heat exchanger arranged downstream of the main projection means for cooling the lubricating liquid.
    [0004] A backup lubrication pump is sometimes arranged in the bottom of the power transmission box to feed the main projection means, possibly without stressing the heat exchanger. This emergency lubrication pump operates continuously or is automatically put into service following a failure of the main lubrication system pump, for example. In the event of a leakage of the coolant, the regulations in force also require that the power transmission be mechanically held for a minimum period of time in order to enable a crew to attempt to put down the aircraft as quickly as possible. . Some current technical solutions then consist in providing an additional lubrication system to meet this requirement. Such an additional system may comprise an additional reservoir of lubricating liquid and an additional pump for circulating the lubricating liquid in pipes provided with projection means dedicated to this additional system.
    [0005] Such an additional system is effective but has multiple additional equipment, namely including a pump and a reservoir and projection means. This additional system can prove to be heavy and difficult to arrange in an environment encumbered by multiple organs.
    [0006] In this context, EP 0.540.406 discloses an additional cooling system of this type. This additional system includes an inlet port and an outlet port which are provided in a casing of a power transmission box. The inlet port and the outlet port 25 are opened under the action of a control device to a predetermined value of a parameter representative of the loss of lubricating oil. An air line opens on the inlet to deliver air. This air line may result in an air intake of the aircraft or may result in a compressor of an engine. In addition, a supply of lubricant external to the power transmission gearbox is arranged to terminate in the air line. The lubricant supply is thus connected to a feed tube which is disposed substantially in the center of the air duct. The lubricant supply is arranged under the air line. EP 0.448.690 discloses an emergency lubricating device 10 to be used in the event of failures of a primary lubricating device. This emergency greasing device comprises an oil reservoir which is filled from the primary greasing device. In addition, the emergency lubrication device includes a dedicated oil spray and an air source external to the power transmission. This air source may include air purged from a motor or an auxiliary air compressor. US 4,717,000 discloses an emergency lubrication system. This emergency lubrication system comprises an emergency tank normally supplied by a primary lubrication system. The emergency lubrication system includes a source of compressed air in the form of a compressor of an outboard motor to a power transmission, a valve responsive to oil pressure, and dedicated foggers. to this emergency lubrication system.
    [0007] The present invention therefore aims to provide an alternative system possibly tending to present a bulk and / or a limited mass. According to the invention, a power transmission box is provided with at least one lubrication system, the lubrication system comprising a lubrication pump which is arranged in a tank containing a lubricating liquid, the lubrication pump being in position. fluidic communication with a fluidic circuit leading to at least one projection means 10 directed towards an internal space of a casing of said power transmission box, the lubricating liquid being drawn into the tank by the lubrication pump to circulate in the fluidic circuit and be projected into the internal space by each projection means.
    [0008] For example, the tank is represented by a bottom of the casing of the power transmission gearbox. A projection means may take the form of a nozzle or even an orifice. In addition, the power transmission comprises an emergency reservoir capable of containing a lubricating fluid, the reservoir being in fluid communication with the fluid circuit, the emergency reservoir being connected by at least one line to the upstream fluid circuit. each projection means, said lubricating fluid being moved in the fluid circuit to each throwing means by a gas which is set in motion by said lubrication pump in the event of leakage of said lubricating liquid. The invention therefore proposes to add to an existing lubrication system an emergency reservoir connected by at least one line to a fluid circuit. Such a spare tank may be independent of the tank containing the lubricating liquid and arranged outside the casing of the power transmission gearbox. The lubrication pump of a power transmission box continues to operate in the absence of lubricating liquid. The Applicant has found that this lubrication pump can then turn into an air compressor in this configuration. Therefore, the lubrication pump moves a gas such as air in the fluid circuit, and no longer the lubricating liquid. The relief tank also carries a lubricating fluid in the fluid circuit. A mixture of this gas and the lubricating fluid is then directed to the projection means. These projection means then project the lubricating fluid, for example in the form of fog.
    [0009] The invention goes against prejudices by operating the vacuum lubrication pump, ie in the absence of the lubricating liquid for which the lubricating pump is initially arranged. The lubrication pump is then transformed into an air compressor.
    [0010] In addition, the transfer of the lubricating fluid into the fluid circuit can be done with a low flow rate. The pressurized gas set in motion by the lubrication pump is then present in the fluid circuit in greater quantity than the lubricating fluid. As a result, standard spray-type spraying means can be turned into foggers. This operation is not obvious. In the absence of the lubricating liquid, the lubrication pump tends to heat up. Nevertheless, the lubrication pump can operate for a minimal time. In fact, the oily mist caused by the lubrication system from the lubricating fluid makes it possible to cool the moving parts in the power transmission box, and possibly the lubrication pump. In addition, a lubrication pump for circulating a fluid has a limited influence on a gas. Nevertheless, the Applicant notes that a low pressurization of the gas present in the power transmission box is sufficient to project the lubricating fluid. Therefore, and contrary to certain prior art, the invention does not require the use of a new source of pressure, for example a compressor of a motor. The own lubrication pump of a power transmission lubrication system is used in a back-up mode of operation to project a back-up lubricating fluid. The invention can then adapt relatively easily to an existing lubrication system. The power transmission can also include one or more of the following features.
    [0011] Thus, the power transmission can include two lubrication systems. Each lubrication system then comprises for safety a spare tank according to the invention. In addition, the relief tank can overhang the fluidic circuit. In this configuration, the lubricating fluid can in particular escape the emergency tank to the fluid circuit by gravity.
    [0012] This configuration may tend to optimize the formation of a lubricant mist with the lubricating fluid. Indeed, the lubricating fluid can fall in the form of drops that "explode" against a wall of the fluid circuit which may tend to promote the mixing of the lubricating fluid with the gas set in motion by the lubrication pump. In addition, the emergency reservoir may comprise a mobile divider that shares the reservoir in a pressurized volume that does not receive a lubricating fluid and a volume that receives the lubricating fluid. The relief tank then has a pressurized volume that maintains the lubricating means at a predetermined pressure. Moreover, in the absence of leakage of the lubricating liquid, the lubricating pump can pressurize the lubricating liquid at a pressure greater than or equal to 1.5 bar, this lubrication pump driving said gas in the fluid circuit to a pressure of pressure of 1.05 bar due to leakage of the lubricating liquid. Such a lubrication pump can thus allow the circulation of the lubricating liquid under normal operating conditions, and a gas in case of leakage of the lubricating liquid. In addition, the emergency reservoir can be connected to the fluid circuit by at least one so-called "outlet line" which opens onto a pipe of the fluid circuit. This outlet conduit directs the lubricating fluid to the fluid circuit, where appropriate under the effect of gravity.
    [0013] The outlet pipe may be dimensioned to generate a flow of lubricating fluid in the form of drops. For example, the outlet conduit includes a restriction for including allowing the flow of lubricating fluid in a drip form. Optionally, at least one outlet pipe has an end provided with a convergent which is arranged within a pipe of the fluid circuit. This lubricating fluid then escapes from the outlet pipe by a venturi effect. To promote this escape, the convergent may be arranged in the middle of the fluidic circuit pipe. According to a first embodiment, the emergency reservoir is filled by the fluid circuit in the absence of leakage of the lubricating liquid, the part of the lubricating liquid which fills the emergency reservoir representing the lubricating fluid. The relief tank represents a retention zone retaining only a portion of the lubricating liquid. The lubrication system is simple. When starting the power transmission, the lubricating liquid fills the emergency tank. The lubricating liquid is then evacuated from the emergency tank in case of leakage of the lubrication system, or even when the gravity transmission gearbox stops.
    [0014] Optionally, the lubricating liquid escapes continuously from the emergency tank, although it is useful only in case of leakage.
    [0015] According to one option, a single line makes it possible to fill the emergency tank in the absence of a leak, and to empty the emergency tank in the presence of a leak. Alternatively, the emergency tank is connected to the fluid circuit by at least one so-called "inlet line", said inlet line being a unidirectional connection allowing only the circulation of a fluid from the fluid circuit to the reservoir. rescue. The inlet line may include a check valve to allow only the flow of fluid from the fluid circuit to the relief tank. An inlet pipe is used to fill the emergency tank, and an outlet pipe allows it to be emptied. In addition and according to a variant, the emergency tank being connected to the fluidic circuit by a pipe called "inlet pipe" to be filled by the fluid circuit in the absence of leakage of the lubricating liquid, said emergency tank being connected to the fluidic circuit by an outlet pipe for transferring a lubricating fluid to the fluid circuit, said outlet pipe 20 has a minimum diameter smaller than a minimum diameter of the inlet pipe. The term "minimum diameter" refers to the smallest diameter of a pipe. This configuration aims at obtaining a small diameter outlet pipe for generating a flow of the lubricating fluid in a drip form and / or for promoting the filling of the relief tank. According to a second embodiment, the emergency tank is only connected to the fluid circuit via an outlet line, the lubricating fluid being distinct from the lubricating liquid. According to this second embodiment, the emergency tank is dedicated to emergency lubrication for use only in case of leakage. This emergency tank is filled by an operator. This second embodiment has the advantage of offering the possibility of using a lubricating fluid different from the lubricating liquid. For example, the lubricating fluid and the lubricating liquid respectively comprise oils having different characteristics. Thus, the lubricating fluid may be an oil more suitable for misting and / or more effective at high temperature than the lubricating liquid. In addition, the emergency tank can be connected to the fluid circuit via a pipe provided with a valve. The valve makes it possible to put in fluid communication the emergency tank and the fluidic circuit only in case of leakage. Such a valve can be controlled by a driver operable control. Alternatively or additionally, the valve is connected to at least one pressure sensor measuring a pressure in said fluid circuit. The valve then opens when the movable members to be lubricated of the power transmission gear are in motion and when the pressure becomes lower than a pressure threshold. For example, the valve is for this purpose also connected to a device measuring the speed of rotation of one of these movable members, or the speed of rotation of a rotor driven by the power transmission gearbox. Alternatively or additionally, the valve is connected to at least one temperature sensor measuring a temperature in the internal space of a casing of the power transmission box, said valve opening when said temperature becomes greater than one. temperature threshold. In addition to a power transmission box, the invention is directed to an aircraft comprising such a power transmission gearbox. . The invention and its advantages will appear in more detail in the following description with examples of embodiments given by way of illustration with reference to the appended figures which represent: FIG. 1, a diagram illustrating an aircraft according to FIG. invention, this aircraft comprising a power transmission gearbox; - FIG. 2, a diagram showing an output pipe comprising a convergent, FIGS. 3 to 5, diagrams explaining the operation of a lubrication system comprising a reservoir fluid supplied by the fluidic circuit of the lubrication system, and - Figure 6, a diagram explaining the operation of a lubrication system comprising a reservoir comprising its own reserve of fluid. The elements present in several separate figures are assigned a single reference.
    [0016] FIG. 1 shows an aircraft 1 according to the invention. This aircraft 1 comprises a rotor 3. Such a rotor 3 may be a rotor participating at least partially in the lift and / or propulsion of the aircraft 1.
    [0017] To set the rotor 3 in motion, the aircraft comprises at least one engine 2 and one power transmission gearbox 5. Therefore, the power transmission gearbox 5 comprises rotating transmission members within a housing 10 Thus, the power transmission gearbox 5 includes in the housing 10 a drive wheel 11 which drives at least one speed reduction stage 15. For example, the speed reduction stage 15 comprises a planetary gear 16 secured in rotation to the drive wheel 11 by a power transmission shaft. This planet wheel 16 meshes with at least one satellite wheel 17 sliding along a peripheral ring 18. Each satellite wheel 17 is also carried by a planet carrier 19. This planet carrier 19 can be mechanically connected to the rotor 3 train according to Figure 1, or can still be connected to another speed reduction stage.
    [0018] The drive wheel 11 can moreover be driven indirectly in rotation about an axis of rotation by each motor. Thus, the power transmission box is provided with a mechanical input member 12 by motor. Each mechanical input member 12 is provided with at least one wheel 12 'which meshes with the drive wheel 11. Furthermore, the power transmission gearbox 5 comprises at least one lubrication system 20 for lubricating the moving parts. of this power transmission gearbox 5.
    [0019] Optionally, two identical or different lubrication systems 20 are fitted to the power transmission box 5. Each lubrication system 20 comprises a lubrication pump 25. The lubrication pump 25 can be set in motion by a wheel 13; wheel 13 being optionally integral in rotation with the drive wheel 11. Therefore, this lubrication pump 25 draws a lubricating liquid 100 in a tray 26 of the power transmission box. Conventionally, the lubricating liquid may comprise oil. Reference will be made to the literature for information relating to lubricating liquids. The tank 26 may comprise the bottom of the casing 10 of the power transmission box 5. Thus, a lubricating liquid injected into an internal space INT of the casing 10 falls into the tank 26 by gravity. In addition, each lubrication system 20 comprises a fluid circuit 30 in fluid communication with the lubrication pump 25. The lubrication pump is thus sized to circulate the lubricating liquid in the fluid circuit 30. The fluid circuit opens at minus a projection means 40 directed towards an inner space INT of a housing. Each projection means 40 may comprise a conventional means, such as an orifice 41 or a nozzle, not shown, for example.
    [0020] The fluidic circuit comprises at least one pipe 31, 32, 33. The term "pipe" is to be interpreted in the broad sense, a pipe may comprise a plurality of individual abutment pipes.
    [0021] The fluidic circuit can be virtually decomposed into an upstream pipe 31 connected to the lubrication pump 25, a central pipe 32 connected to the upstream pipe 31, and a downstream pipe 33 by projection means 40. Optionally, the upstream pipe 31 cooperates with the pipe 31. With a heat exchanger 35 in the absence of leakage of the lubricating liquid such as leakage from the tank 26, the lubricating liquid 100 is drawn into the tank 26 by the lubricating pump 25. The lubricating liquid then circulates. in the fluid circuit 30 to be finally projected into the internal space INT by each projection means 40. To lubricate this internal space following a leakage of the lubricating liquid 100, at least one or even each lubrication system 20 comprises additionally a backup tank 50. The emergency tank 50 of a lubrication system 20 is arranged in parallel with the fluid circuit of this lubrication system 20. The The emergency reservoir comprises a casing 51 containing a lubricating fluid 200. The lubricating fluid 200 may comprise oil. The spare tank 50 is independent of the tray 26. As a result, the spare tank represents a separate container of the tray 26.
    [0022] In addition, the emergency tank may be arranged outside the casing 10 which includes the rotating members of the power transmission gearbox.
    [0023] This emergency reservoir 50 is then in fluid communication with the fluid circuit 30 upstream of the projection means 40, ie for example upstream of the downstream pipes 33. As a result, the emergency tank may be in fluid communication with the pump 30. the central pipe 32. For this purpose, the emergency reservoir 50 comprises at least one pipe 60 extending from the casing 51 to the fluid circuit 30. FIG. 1 shows two emergency tanks 50 made respectively according to a first embodiment embodiment and a second embodiment. Whatever the embodiment, the emergency tank is thus connected by at least one pipe called the outlet pipe 61 to the fluid circuit.
    [0024] This outlet duct makes it possible in particular for the lubricating fluid 200 to join the fluidic circuit 30. To facilitate this movement, an emergency reservoir 50 can overhang the corresponding fluid circuit 30 to allow gravity flow of the lubricating fluid 200.
    [0025] The outlet pipe 61 then opens onto a pipe of the fluidic circuit, in particular the central pipe according to FIG. 1. According to the variant of FIG. 1, an outlet pipe 61 comprises an orifice 61 'opening on the fluidic circuit. In addition, the outlet pipe may include a restriction 64 to particularly promote a drip-like flow. According to the variant of Figure 2, an outlet pipe has an end provided with a convergent 65 which is arranged in the fluid circuit. For example, the convergent 65 is arranged in the middle of a pipe of the fluidic circuit. Moreover, and with reference to FIG. 1, a line of an emergency reservoir may be provided with a valve 70.
    [0026] In particular, an outlet conduit 61 may include such a valve 70 to permit the flow of the lubricating fluid only under predetermined conditions. A valve 70 can be controlled by a control 72 operable by a pilot.
    [0027] In addition, a valve 70 may be controlled depending on a pressure in the fluid circuit. The valve 70 is then connected to at least one pressure sensor 71 measuring a pressure in this fluid circuit 30. Said valve 70 can optionally open when the measured pressure becomes less than a pressure threshold. A valve 70 can also be controlled by a temperature in the internal space INT of a power transmission box. The valve 70 is then connected to at least one temperature sensor 73 measuring a temperature in this internal space INT, said valve opening when said temperature becomes greater than a temperature threshold. Furthermore, an emergency reservoir may comprise a divider 55. Such a divider 55 has, for example, a piston or a membrane sharing the emergency reservoir 50 in a pressurized volume 56 not receiving a lubricating fluid 200 and a volume of lubricant 57 accommodating the lubricating fluid 200. The pressurized volume 56 may for example comprise a gas injected by an operator at a predetermined pressure.
    [0028] The pressure in the volume of lubricant 57 is less than the pressure of the lubricating liquid in the fluid circuit. According to a first embodiment illustrated on the lubrication system 20 to the left of FIG. 1, the emergency reservoir is filled by the fluid circuit 30. In the absence of leakage of the lubricating liquid, part of this liquid lubricant fills the emergency tank. The lubricating fluid 200 thus represents a portion of the lubricating liquid 100. The outlet pipe may allow the delivery of the lubricating liquid to the emergency reservoir according to a first alternative not shown. Nevertheless, according to the second alternative illustrated in FIG. 1, the emergency reservoir comprises a pipe called inlet pipe 62 to be filled by the fluid circuit. The inlet pipe 62 is situated upstream of the outlet pipe 61. The inlet pipe further extends from the fluid circuit, and in particular from the central pipe 32, towards the envelope 51 of the emergency tank 50. This inlet duct 62 may be a unidirectional connection allowing only the circulation of the lubricating liquid of the fluidic circuit 30 towards the emergency tank 50.
    [0029] As a result, the inlet pipe may have a check valve 63. In addition, the inlet pipe 62 and the outlet pipe 61 may have different dimensions. The outlet pipe 61 thus has a minimum diameter D1 which is smaller than a minimum diameter D2 of the inlet pipe 62. The emergency tank according to the first embodiment shown in FIG. 1 has a valve 70. However, such a valve is optional and in particular is not shown in FIGS. 3 to 5. According to a second embodiment illustrated on the lubrication system 20 to the right of FIG. 1, the emergency reservoir is not not filled by the fluid circuit 30.
    [0030] The emergency reservoir 50 is only connected to the fluid circuit 30 through an outlet line 61. In addition, the lubricating fluid 200 is distinct from the lubricating liquid 100. The expression "is distinct from the lubricating liquid 100" means that the lubricating fluid is not a part of the lubricating liquid. The lubricating fluid is introduced into the emergency tank 50 by an operator. Nevertheless, the lubricating fluid and the lubricating liquid may be different or identical fluids. The outlet pipe may be provided with a valve of the type described above. Regardless of the completion of the emergency tank, the lubrication system lacks a compressor external to the power transmission gearbox. Indeed, in case of leakage of the lubricating liquid, the lubricating fluid 200 contained in an emergency tank is moved in the fluid circuit 30 to each throwing means 40 by a gas. In case of leakage of the lubricating liquid, the tank 26 is indeed filled with a gas, such as air. This gas is then set in motion by the lubrication pump 25 in the fluid circuit and mixes with the lubricating fluid, to allow the distribution of the lubricating fluid in the internal space INT by the projection means 40.
    [0031] The invention therefore does not require an additional air compressor. Figures 3 to 5 illustrate the operation of the invention with an emergency reservoir made according to the first embodiment.
    [0032] Referring to FIG. 3, the emergency reservoir is empty before the power transmission gearbox is started. With reference to FIG. 4, when the power transmission gear is set in motion by at least one motor, the lubrication pump operates.
    [0033] This lubrication pump induces the circulation of the lubricating liquid 100 in the fluid circuit 30. The lubrication pump can then pressurize the lubricating liquid 100 in the fluid circuit at a pressure greater than or equal to 1.5 bar, a bar being equal to 101300 Pascals.
    [0034] When the lubricating liquid 100 reaches the central pipe 32, a part of this lubricating liquid 100 passes through the inlet pipe 62 to reach the emergency tank 50. The outlet pipe 61 having a minimum diameter smaller than the minimum diameter of In the inlet line 62, a portion of the lubricating liquid remains in the standby reservoir to provide a supply of lubricating fluid 200. Optionally, a valve may be arranged on the outlet pipe to allow the emergency reservoir to be filled. .
    [0035] The level of the lubricating fluid therefore rises in the emergency tank. Thus, the emergency tank fills passively. If desired, a divider 55 is operative to define a pressurized volume of gas 56 in the relief tank to maintain the lubricating fluid at a predetermined pressure. For example, the lubricating fluid is maintained at a pressure of between 1.1 and 1.5 bar. Optionally, a part of the lubricating fluid flows into the fluid circuit, without influencing the operation of this fluid circuit. When the power transmission is stopped, the lubricating fluid flows by gravity into the fluid circuit, the emergency reservoir returning to the state shown in FIG. 3. In case of leakage of the liquid and with reference to Figure 3, the lubricating pump circulates a gas 300 in the fluid circuit. This gas has a pressure lower than 1.5 bar. In particular, the pressure of the gas is lower than the pressure prevailing in the pressurized volume, reaching for example a pressure of the order of 1.05 bar. According to the variant of Figure 5, the lubricating fluid flows by gravity into the outlet pipe 61, then flows in the form of a drop in the fluid circuit.
    [0036] According to the variant of FIG. 2, the lubricating fluid escapes from the convergent 65 by the venturi effect. The mixture of gas and lubricating fluid is then directed to the spraying means which causes the lubricating fluid to be misted inside the casing of the power transmission gearbox. According to the second embodiment of FIG. 6, in the presence of leakage of the lubricating liquid, the lubrication pump circulates a gas 300 in the fluid circuit. In addition, the valve 70 opens. The lubricating fluid then flows by gravity into the outlet line 61 to be mixed with the gas 300. Naturally, the present invention is subject to many variations in its operation. Although several embodiments have been described, it is well understood that it is not conceivable to exhaustively identify all the possible modes. It is of course conceivable to replace a means described by equivalent means without departing from the scope of the present invention.
    权利要求:
    Claims (17)
    [0001]
    REVENDICATIONS1. Power transmission gearbox (5) provided with at least one lubrication system (20), said lubrication system (20) comprising a lubrication pump (25) which is arranged in a tank (26) containing a lubricating liquid (100), said lubrication pump (25) being in fluid communication with a fluid circuit (30) opening on at least one projection means (40) directed towards an internal space (INT) of a housing (10) of said a power transmission box (5), said lubricating liquid (100) being drawn into said trough (26) by said lubrication pump (25) to circulate in said fluid circuit (30) and be projected into said internal space (INT ) by each projection means (40), characterized in that said power transmission box (5) comprises an emergency reservoir (50) adapted to contain a lubricating fluid (200), said emergency reservoir (50) being in fluid communication with said circui fluidic fluid (30), said emergency reservoir (50) being connected by at least one line (60) to the fluid circuit (30) upstream of each projection means (40), said lubricating fluid (200) being displaced in the fluidic circuit (30) to each throwing means (40) by a gas (300) which is set in motion by said lubrication pump (25) in the event of leakage of said lubricating liquid (100).
    [0002]
    2. Transmission box power according to claim 1, characterized in that said power transmission box (5) comprises two lubrication systems (20).
    [0003]
    3. power transmission box according to any one of claims 1 to 2, characterized in that said reserve tank (50) overhangs said fluidic circuit (30).
    [0004]
    4. Power transmission box according to any one of claims 1 to 3, characterized in that said emergency tank (50) comprises a divider (55) mobile sharing said emergency tank (50) in a pressurized volume ( 56) not receiving a lubricating fluid (200) and a volume accommodating said lubricating fluid (200). 10
    [0005]
    Power transmission gearbox according to one of Claims 1 to 4, characterized in that in the absence of leakage of the lubricating liquid (100), said lubrication pump (25) pressurizes the lubricating liquid to a pressure greater than or equal to 1.5 bar, said lubrication pump (25) driving said gas in said fluid circuit (30) at a pressure of 1.05 bar following leakage of the lubricating liquid (100).
    [0006]
    6. Transmission box according to any one of claims 1 to 5, characterized in that said emergency reservoir (50) is connected to the fluid circuit (30) by at least one pipe called "outlet pipe (61 ) "Which opens onto a pipe (32) of the fluid circuit (30).
    [0007]
    Power transmission gearbox according to one of Claims 1 to 6, characterized in that the said emergency reservoir (50) is connected to the fluidic circuit (30) by at least one so-called "outlet duct" (61). ), Said outlet pipe (61) having a convergent end (65) which is arranged within a pipe (32) of the fluid circuit (30).
    [0008]
    8. Power transmission box according to any one of claims 1 to 7, characterized in that said emergency reservoir (50) is filled by said fluid circuit (30) in the absence of leakage of said lubricating liquid, the portion of the lubricating liquid which fills said emergency reservoir (50) representing said lubricating fluid (200). 10
    [0009]
    9. Power transmission box according to claim 8, characterized in that said emergency tank (50) is connected to the fluidic circuit (30) by at least one pipe called "inlet line (62)", said pipe the inlet (62) being a unidirectional connection allowing only the circulation of a fluid from the fluidic circuit (30) to the emergency tank (50).
    [0010]
    10. Transmission box according to any one of claims 1 to 9, characterized in that said emergency tank (50) being connected to the fluidic circuit (30) by a pipe called "conduit input (62) To be filled by the fluid circuit (30) in the absence of leakage of the lubricating liquid (100), said emergency reservoir (50) being connected to the fluid circuit (30) via an outlet pipe (61) for transferring a lubricating fluid (200) to the fluid circuit (30), said outlet pipe (61) has a minimum diameter (D1) smaller than a minimum diameter (D2) of the inlet pipe (62). 3037355 26
    [0011]
    Power transmission box according to claim 7, characterized in that said emergency reservoir (50) is connected solely to the fluid circuit (30) via an outlet line (61), the lubricating fluid (200) being separate lubricating liquid (100).
    [0012]
    Power transmission gearbox according to one of Claims 1 to 11, characterized in that the said emergency reservoir (50) is connected to the fluid circuit (30) via a pipe provided with a valve (70).
    [0013]
    13. Power transmission box according to claim 11, characterized in that said valve (70) is controlled by a control (72) operable by a pilot. 15
    [0014]
    14. Power transmission box according to any one of claims 12 to 13, characterized in that said valve (70) is connected to at least one pressure sensor (71) measuring a pressure in said fluid circuit (30). 20
    [0015]
    Power transmission box according to any one of claims 12 to 14, characterized in that said valve (70) is connected to at least one temperature sensor (73) measuring a temperature in said internal space (INT), said valve opening when said temperature becomes greater than a temperature threshold. 3037355 27
    [0016]
    16. Power transmission box according to any one of claims 1 to 15, characterized in that said reserve tank (50) is independent of said tray (26) and arranged outside said housing (10). 5
    [0017]
    17. Aircraft (1), characterized in that said aircraft (1) comprises a power transmission box (5) according to any one of claims 1 to 16.
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    同族专利:
    公开号 | 公开日
    FR3037355B1|2017-05-19|
    EP3104044A1|2016-12-14|
    CN106246886A|2016-12-21|
    CN106246886B|2018-07-27|
    KR20160146578A|2016-12-21|
    US10012305B2|2018-07-03|
    EP3104044B1|2019-08-28|
    KR101869856B1|2018-06-21|
    US20160363208A1|2016-12-15|
    引用文献:
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    US4976335A|1989-02-14|1990-12-11|Fiat Aviazione S.P.A.|System for lubricating mechanical members, in particular aircraft components, featuring a minimum emergency oil supply device|
    EP0443901A1|1990-02-20|1991-08-28|AEROSPATIALE Société Nationale Industrielle|Rotorcraft main gearbox having an emergency lubrication device|
    US5046306A|1990-07-23|1991-09-10|General Motors Corporation|Secondary oil system|
    FR2826094A1|2001-06-15|2002-12-20|Eurocopter France|Lubricating and cooling system for transmission box comprises principal and auxiliary safety devices, and lubricating and cooling liquid reservoir and pressurized gas source supplying spray nozzles|
    US20070261922A1|2006-01-05|2007-11-15|Sikorsky Aircraft Corporation|Secondary lubrication system with injectable additive|
    WO2011059450A1|2009-11-16|2011-05-19|Bell Helicopter Textron Inc.|Emergency subsystem for a fluid system|
    US20140090930A1|2012-09-28|2014-04-03|United Technologies Corporation|Multiple reservoir lubrication system|
    US4717000A|1986-08-05|1988-01-05|Avco Corporation|Integrated emergency lubrication system|
    US5097926A|1989-10-13|1992-03-24|Bell Helicopter Textron Inc.|Emergency lubrication mist system|
    FR2683204B1|1991-10-30|1997-04-25|Aerospatiale|SYSTEM FOR BACKING UP A MULTIPLIER / REDUCER MECHANICAL ASSEMBLY, PARTICULARLY OF THE HELICOPTER "TRANSMISSION" TYPE, IN CASE OF LOSS OF LUBRICATING OIL.|
    EP2297461B1|2008-06-02|2012-10-03|Vestas Wind Systems A/S|A lubrication system for a gear system for a wind turbine|
    CA2779199C|2009-11-16|2015-08-04|Bell Helicopter Textron Inc.|Dual-path fluid injection jet|
    ES2496417T3|2011-11-30|2014-09-19|Siemens Aktiengesellschaft|Gear for industrial applications or wind power installations|
    FR3045764B1|2015-12-17|2017-12-22|Airbus Helicopters|SIMPLIFIED ARCHITECTURE BACKUP LUBRICATION DEVICE FOR A MAIN POWER TRANSMISSION BOX OF AN AIRCRAFT|US20170138461A1|2015-08-12|2017-05-18|Sikorsky Aircraft Corporation|Lubrication systems|
    US10190672B2|2016-04-04|2019-01-29|Bell Helicopter Textron Inc.|Gearbox lubrication system|
    JP6846301B2|2017-06-27|2021-03-24|川崎重工業株式会社|Power transmission device for helicopters|
    CN107366820B|2017-07-18|2019-04-19|中国石油大学|A kind of adaptive sliding bearing circulating oil system|
    US11077936B2|2018-01-19|2021-08-03|Textron Innovations Inc.|Fluid delivery device|
    CN108443475B|2018-02-11|2020-06-05|厦门联帮匠心机械设备有限公司|Directional spraying lubrication method for power takeoff|
    JP2020045042A|2018-09-21|2020-03-26|川崎重工業株式会社|Transmission lubrication structure for helicopter|
    DE102019126914A1|2019-10-08|2021-04-08|Audi Ag|Lubricant supply system for a drive device of an electrically operated vehicle|
    法律状态:
    2016-06-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-16| PLSC| Search report ready|Effective date: 20161216 |
    2017-06-21| PLFP| Fee payment|Year of fee payment: 3 |
    2018-06-26| PLFP| Fee payment|Year of fee payment: 4 |
    2020-06-19| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1501213A|FR3037355B1|2015-06-11|2015-06-11|TRANSMISSION BOX OF POWER AND AIRCRAFT|FR1501213A| FR3037355B1|2015-06-11|2015-06-11|TRANSMISSION BOX OF POWER AND AIRCRAFT|
    EP16171130.4A| EP3104044B1|2015-06-11|2016-05-24|A power transmission gearbox and an aircraft|
    US15/173,879| US10012305B2|2015-06-11|2016-06-06|Power transmission gearbox and an aircraft|
    CN201610403235.4A| CN106246886B|2015-06-11|2016-06-08|Power transmission tooth roller box and aircraft|
    KR1020160072625A| KR101869856B1|2015-06-11|2016-06-10|A power transmission gearbox and an aircraft|
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