Counter-rotating device locking mechanism and aeroengine comprising same

Abstract

The application discloses a reverse thrust device locking mechanism and an aero-engine comprising the same, the reverse thrust device locking mechanism comprising a shell, a liquid supply part and a locking rod, the shell comprising an internal cavity, a liquid inlet and a liquid outlet which are in communication with each other, the first end of the locking rod being arranged in the internal cavity, the second end of the locking rod extending to the outside of the shell and being capable of engaging with a moving cover, the locking rod being arranged to switch between a locking position and an unlocking position according to the pressure on the side of the liquid inlet; in the locking position, the locking rod engages with the moving cover, and the reverse thrust device locking mechanism is in a locked state; in the unlocking position, the locking rod moves along the axial direction thereof to the side away from the moving cover, and the reverse thrust device locking mechanism is in an unlocked state. The application drives the movement of the locking rod through hydraulic pressure, and has the advantages of simple working principle, high stability, simple structure of hydraulic transmission, no need to arrange electrical control equipment such as electromagnetic valves, no need to design a complex circuit layout, and effective reduction of production and assembly costs.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automatic control of aviation, in particular to a reverse thrust device locking mechanism and an aero-engine comprising the same. BACKGROUND

[0002] The reverse thrust device is used to generate reverse thrust when the aircraft lands and interrupts take-off. When the reverse thrust is deployed, the moving cowl moves backward and the bypass airflow is ejected against the direction of flight, generating reverse thrust to slow down the aircraft. The reverse thrust device is not allowed to be deployed in the air. In order to prevent the moving cowl of the reverse thrust from moving non-instructively in the air, a locking device is needed to lock the moving cowl.

[0003] The locking device of the reverse thrust device generally includes an actuator lock, a synchronous shaft lock and a third line of defense lock. The third line of defense lock is used as a supplement to the actuator lock, the synchronous shaft lock and the like. The establishment of the third line of defense lock is generally achieved by locking the moving cowl. The accidental deployment of the reverse thrust device is further prevented by locking the moving cowl, thereby improving safety. A third line of defense lock in the prior art controls the locking state of the moving cowl through an electromagnetic valve and other electrical equipment. The overall structure is relatively complex, and the production and maintenance costs are relatively high. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defect that the structure of the third line of defense lock of the reverse thrust device in the prior art is relatively complex, and to provide a reverse thrust device locking mechanism and an aero-engine comprising the same.

[0005] The present application solves the above technical problems by the following technical solutions:

[0006] A reverse thrust device locking mechanism for locking a moving cowl of an aero-engine, the reverse thrust device locking mechanism comprising:

[0007] A housing comprising an internal chamber, a liquid inlet and a liquid outlet, the internal chamber, the liquid inlet and the liquid outlet being in communication;

[0008] A liquid supply part connected to the liquid inlet and configured to supply liquid to the internal chamber;

[0009] A locking rod having a first end arranged in the internal chamber and a second end extending to the outside of the housing and capable of engaging with the moving cowl, the locking rod being configured to switch between a locking position and an unlocking position according to the pressure on the side of the liquid inlet;

[0010] In the locking position, the locking rod engages with the moving cowl, and the reverse thrust device locking mechanism is in a locked state;

[0011] In the unlocked position, the locking rod moves along its axial direction towards the side away from the mobile cover, and the reverse thrust device locking mechanism is in the unlocked state.

[0012] In the present scheme, the liquid supply part is connected with the shell and supplies liquid to the internal chamber of the shell, so that a pressure difference can occur in the internal chamber, and the locking rod moves under the action of the pressure difference. When the reverse thrust device does not need to be deployed, the locking rod engages with the mobile cover to prevent the mobile cover from being deployed, thereby preventing the reverse thrust device from being accidentally deployed, improving safety. When the reverse thrust device needs to be deployed, the locking rod is moved to the unlocked position, and the locking rod does not interfere with the deployment of the mobile cover, thereby ensuring the smooth deployment of the reverse thrust device and ensuring the normal use of the reverse thrust device. The present scheme drives the movement of the locking rod by hydraulic pressure, and the working principle is simple and stable. Moreover, the structure of hydraulic transmission is simple, and there is no need to set up electromagnetic valves and other electrical control equipment, nor to design a complex circuit layout. The overall structure of the reverse thrust device locking mechanism is simple and easy to assemble, effectively reducing production and assembly costs.

[0013] Preferably, the reverse thrust device locking mechanism further comprises a first limiting part, which is arranged in the internal chamber and is arranged to switch between a first position and a second position according to the pressure on the liquid inlet side;

[0014] In the first position, the first limiting part limits the movement of the locking rod, and the locking rod is in the locked position;

[0015] In the second position, the first limiting part does not interfere with the movement of the locking rod, and the locking rod is in the unlocked position.

[0016] In the present scheme, the first limiting part limits the locking rod in the locked position, ensuring that the locking rod always engages with the mobile cover when the reverse thrust device does not need to be deployed, and will not be affected by external forces to move, improving safety. In the case where the reverse thrust device needs to be deployed, the first limiting part switches to the second position to ensure the normal movement of the locking rod.

[0017] Preferably, the first limiting part comprises a limiting block, and the locking rod has a cooperating part;

[0018] In the first position, the limiting block engages with the cooperating part to limit the movement of the locking rod;

[0019] In the second position, the limiting block does not cooperate with the cooperating part.

[0020] In the present scheme, the locking effect of the limiting block on the locking rod is realized by the cooperation of the limiting block and the cooperating part, effectively preventing the easy movement of the locking rod. The above arrangement is also conducive to the positioning of the limiting block relative to the locking rod during the assembly process, improving the assembly efficiency.

[0021] Preferably, the matching part comprises a limiting groove.

[0022] In the first position, the first end of the limiting block is accommodated in the limiting groove, and the limiting block limits the movement of the locking rod in the axial direction thereof.

[0023] In the second position, the first end of the limiting block is moved out of the limiting groove, and the limiting block does not interfere with the movement of the locking rod in the axial direction thereof.

[0024] In this scheme, the matching part with the limiting groove structure is simple in structure, easy to process and form, and low in cost.

[0025] Preferably, along the movement direction of the locking rod, the limiting block and the limiting groove are respectively provided with first and second matching surfaces which are close to one side of the second end of the locking rod, and the first and second matching surfaces are both inclined surfaces; and the first and second matching surfaces are inclined upward from the first end of the locking rod toward the second end of the locking rod.

[0026] In this scheme, the above-mentioned arrangement is conducive to the relative movement between the limiting block and the locking rod, and the locking rod can drive the limiting block to move during the movement in the direction away from the moving cover, so that a driving mechanism for driving the limiting block to move is not additionally arranged, the structure of the locking mechanism of the reverse thrust device is simplified, and the production and assembly costs are reduced.

[0027] Preferably, the axis of the locking rod is parallel to the horizontal direction, the matching part is arranged at the upper end of the locking rod, the limiting block is located above the locking rod, and the limiting block can move up and down.

[0028] In this scheme, the limiting block can fall to the second position by gravity, so that a driving mechanism for driving the limiting block to switch from the second position to the first position is not additionally arranged, the structure of the locking mechanism of the reverse thrust device is simplified, and the production and assembly costs are reduced.

[0029] Preferably, the locking mechanism of the reverse thrust device further comprises a second limiting part, the second limiting part is arranged in the internal chamber, the second limiting part and the inner wall of the shell form a movement channel, and the limiting block moves in the movement channel.

[0030] In this scheme, the second limiting part is used to limit the movement direction of the limiting block, prevent the position deviation of the limiting block during the movement, and improve the reliability of the movement of the limiting block.

[0031] Preferably, the second limiting portion extends along the moving direction of the locking rod, and the second limiting portion and the inner wall of the shell form a first space for accommodating the locking rod, and the two ends of the locking rod in the radial direction are in abutment with the second limiting portion and the inner wall of the shell, respectively.

[0032] In the scheme, the above arrangement enables the second limiting portion to limit the moving direction of the locking rod in addition to limiting the moving direction of the limiting block, prevents the position offset of the locking rod during movement, and improves the reliability of the movement of the locking rod. The limiting block and the locking rod share one limiting mechanism, which further simplifies the structure of the whole locking mechanism of the reverse thrust device and reduces the production and assembly costs.

[0033] Preferably, the locking mechanism of the reverse thrust device further comprises a third limiting portion, the third limiting portion is arranged in the internal chamber, and the third limiting portion is arranged to switch between a third position and a fourth position according to the pressure on the liquid inlet side.

[0034] In the third position, the third limiting portion limits the movement of the first limiting portion, and the first limiting portion is in the first position.

[0035] In the fourth position, the third limiting portion does not interfere with the movement of the first limiting portion, and the first limiting portion is in the second position.

[0036] In the scheme, the movement of the first limiting portion is limited by the third limiting portion, which prevents the easy movement of the first limiting portion, and further prevents the movement of the locking rod limited by the first limiting portion, thereby improving the reliability of the locking mechanism of the reverse thrust device.

[0037] Preferably, the first limiting portion comprises a limiting block, and the third limiting portion comprises a limiting rod.

[0038] In the third position, the first end of the limiting rod is in abutment with the second end of the limiting block, and the first end of the limiting block is in abutment with the locking rod.

[0039] In the fourth position, the limiting rod moves along its axial direction towards the direction away from the limiting block, and the locking rod pushes the limiting block to move towards the direction close to the limiting rod.

[0040] In the scheme, the limiting of the first limiting portion by the third limiting portion is realized by the cooperation of the limiting block and the limiting rod, which is simple in structure and working principle and convenient to assemble.

[0041] Preferably, the locking mechanism of the reverse thrust device further comprises a first elastic member, the first elastic member is arranged in the internal chamber and in abutment with the second end of the limiting rod, and the first elastic member is used to bias the limiting rod so that the first end of the limiting rod is in abutment with the second end of the limiting block.

[0042] In the present scheme, the first elastic member is used for resetting the limiting rod, so that the limiting rod can automatically switch from the fourth position to the third position when the reverse thrust device locking mechanism is not working. The first elastic member has a simple structure, and no additional resetting device for the limiting rod is needed, which simplifies the structure of the reverse thrust device locking mechanism as a whole and reduces the production and assembly costs.

[0043] Preferably, the reverse thrust device locking mechanism further comprises a second elastic member arranged in the internal chamber and abutting against the first end of the locking rod, and the second elastic member is used for biasing the locking rod so that the second end of the locking rod engages with the moving cover.

[0044] In the present scheme, the second elastic member is used for resetting the locking rod, so that the locking rod can automatically switch from the unlocking position to the locking position when the reverse thrust device locking mechanism is not working. The second elastic member has a simple structure, and no additional resetting device for the locking rod is needed, which simplifies the structure of the reverse thrust device locking mechanism as a whole and reduces the production and assembly costs.

[0045] Preferably, the reverse thrust device locking mechanism further comprises a flow limiting portion arranged in the internal chamber, and along the liquid flow direction in the internal chamber, the flow limiting portion is arranged close to the liquid outlet relative to the locking rod; the flow limiting portion forms a flow limiting channel, the flow limiting channel is located between the second elastic member and the liquid outlet, and the position of the flow limiting channel corresponds to the positions of the second elastic member and the liquid outlet.

[0046] In the present scheme, the flow limiting portion is used for reducing the liquid flow on one side of the second elastic member, preventing the position of the second elastic member from deviating due to excessive liquid flow, and ensuring that the second elastic member can normally bias the locking rod.

[0047] Preferably, along the moving direction of the locking rod, the liquid inlet is arranged close to the second end of the locking rod relative to the liquid outlet.

[0048] In the present scheme, the liquid inlet is used for delivering liquid to the internal chamber, and the liquid outlet is used for outputting the liquid in the internal chamber. Therefore, during the use of the reverse thrust device locking mechanism, the liquid pressure on the side of the liquid inlet is greater than that on the side of the liquid outlet. The above arrangement enables the locking rod to move in the correct direction according to the liquid pressure.

[0049] Preferably, the liquid inlet and the liquid outlet are both arranged on the upper end face of the housing, and the liquid inlet and the liquid outlet are arranged along the moving direction of the locking rod.

[0050] In the present scheme, a preferred position layout of the liquid inlet and liquid outlet is provided, which can prevent the liquid inlet and liquid outlet from interfering with the locking beam of the aero-engine, affect the normal entry of the liquid into the internal cavity of the shell, and improve the feasibility of the locking mechanism of the reverse thrust device. In addition, the layout can also ensure the moving direction of the locking rod and ensure that the locking rod can normally lock or unlock the moving cover, thereby improving the reliability of the locking mechanism of the reverse thrust device.

[0051] An aero-engine comprises a locking beam and a reverse thrust device locking mechanism as described above, and the shell is fixed on the locking beam.

[0052] In the present scheme, the application field of the reverse thrust device locking mechanism is provided, the shell is fixed on the locking beam and can remain relatively static relative to the locking beam, and the reverse thrust device locking mechanism is used to realize the locking and unlocking of the moving cover, thereby ensuring that the reverse thrust device cannot be accidentally deployed and improving the safety.

[0053] On the basis of common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, thereby obtaining each preferred example of the present application.

[0054] The positive progress effect of the present application is that the liquid supply part is connected with the shell and supplies liquid to the internal cavity of the shell, so that a pressure difference can occur in the internal cavity, and the locking rod moves under the action of the pressure difference. When the reverse thrust device does not need to be deployed, the locking rod engages with the moving cover to prevent the moving cover from being deployed, thereby preventing the reverse thrust device from being accidentally deployed and improving the safety. When the reverse thrust device needs to be deployed, the locking rod is moved to the unlocking position, the locking rod does not interfere with the deployment of the moving cover, thereby ensuring that the reverse thrust device can be smoothly deployed and ensuring the normal use of the reverse thrust device. The present application drives the movement of the locking rod through hydraulic pressure, and the working principle is simple and stable. In addition, the structure of the hydraulic transmission is simple, and no electrical control equipment such as electromagnetic valves or complex circuit layout needs to be designed. The overall structure of the locking mechanism of the reverse thrust device is simple and convenient to assemble, thereby effectively reducing the production and assembly costs. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 FIG. 1 is a perspective view of the reverse thrust device locking mechanism according to an embodiment of the present application.

[0056] Figure 2 FIG. 2 is a cross-sectional view of the reverse thrust device locking mechanism according to an embodiment of the present application in a locked state.

[0057] Figure 3 FIG. 3 is a cross-sectional view of the reverse thrust device locking mechanism according to an embodiment of the present application in an unlocked state.

[0058] BRIEF DESCRIPTION OF DRAWINGS

[0059] Mobile cover 11

[0060] Lock hole 111

[0061] Locking beam 12

[0062] Shell 2

[0063] Internal chamber 21

[0064] Liquid inlet 22

[0065] Liquid outlet 23

[0066] Through hole 24

[0067] Locking rod 3

[0068] First end 31 of the locking rod

[0069] Second end 32 of the locking rod

[0070] Limiting groove 4

[0071] Second matching surface 41

[0072] Limiting block 5

[0073] First matching surface 51

[0074] First end 52 of the limiting block

[0075] Second end 53 of the limiting block

[0076] Second limiting part 6

[0077] Mobile channel 61

[0078] First space 62

[0079] Second space 63

[0080] Limiting rod 7

[0081] First end 71 of the limiting rod

[0082] Second end 72 of the limiting rod

[0083] First elastic member 82

[0084] Second elastic member 81

[0085] Flow limiting part 9

[0086] Flow limiting channel 91

[0087] Fourth limiting part 100

[0088] Liquid inlet connector 101

[0089] Liquid outlet connector 102

[0090] mounting ear 103

[0091] mounting hole 104 DETAILED DESCRIPTION

[0092] The application will be further described by way of example but without limitation.

[0093] As Figures 1-3 shown, the embodiment provides an aero-engine, comprising a reverse thrust device and a movable casing 11, the reverse thrust device is used to generate a reverse thrust when the airplane lands and interrupts take-off, when the reverse thrust device is deployed, the movable casing 11 moves backward and ejects the bypass airflow against the flight direction, generating a reverse thrust to slow down the airplane. In order to avoid the accidental deployment of the reverse thrust device, the aero-engine further comprises a locking beam 12 and a reverse thrust device locking mechanism, the locking beam 12 is used to fix the reverse thrust device locking mechanism, and the reverse thrust device locking mechanism is used to lock the reverse thrust device. The reverse thrust device locking mechanism in the embodiment is a third line of defense lock, which locks the reverse thrust device by locking the movable casing 11, preventing the accidental deployment of the reverse thrust device and improving safety.

[0094] As Figures 1-3 shown, the reverse thrust device locking mechanism comprises a shell 2, a liquid supply part and a locking rod 3.

[0095] As Figure 1 shown, the shell 2 comprises an internal chamber 21, a liquid inlet 22 and a liquid outlet 23, the internal chamber 21, the liquid inlet 22 and the liquid outlet 23 are in communication, liquid can flow from the liquid inlet 22 into the internal chamber 21, then flow from the internal chamber 21 to the liquid outlet 23, and further flow out of the internal chamber 21 from the liquid outlet 23. The shell 2 is fixed on the locking beam 12, and the locking beam 12 plays a role in supporting the reverse thrust device locking mechanism and ensuring the stable operation of the reverse thrust device locking mechanism.

[0096] The liquid supply part (not shown in the figure) is connected and communicated with the liquid inlet 22, and is used to supply liquid to the internal chamber 21, ensuring the stability of the amount of liquid in the internal chamber 21, and being able to form a pressure difference to drive the movement of the locking rod 3. In the embodiment, the liquid supplied by the liquid supply part is high-pressure oil, and in other alternative embodiments, the liquid supply part can also supply other types of liquid. The liquid supply part in the embodiment is arranged outside the shell 2, which can not occupy the space of the internal chamber 21, simplify the structure inside the internal chamber 21, and facilitate the layout of the components inside the internal chamber 21. In other alternative embodiments, the liquid supply part can also be arranged inside the internal chamber 21, in which case, the liquid inlet 22 and the liquid outlet 23 can not be arranged on the shell 2.

[0097] The locking rod 3 is a long rod structure, and has opposite first and second ends along its axial direction. The first end 31 of the locking rod is arranged in the internal chamber 21, and the second end 32 of the locking rod extends to the outside of the shell 2 and can engage with the mobile cover 11. As shown in Figure 2 The mobile cover 11 is provided with a lock hole 111 for the second end 32 of the locking rod to extend into, and the engagement between the second end 32 of the locking rod and the lock hole 111 of the mobile cover 11 realizes the engagement between the locking rod 3 and the mobile cover 11, thereby limiting the movement of the mobile cover 11 and further limiting the unfolding of the reverse thrust device.

[0098] The shell 2 is provided with a through hole 24 for the locking rod 3 to pass through, and the gap between the through hole 24 and the locking rod 3 needs to be sealed to prevent the high-pressure oil in the internal chamber 21 from flowing to the outside of the shell 2 through the gap between the through hole 24 and the locking rod 3, thereby preventing the leakage of high-pressure oil.

[0099] The locking rod 3 is arranged to switch between the locked position and the unlocked position according to the pressure on the liquid inlet side. Specifically, when the liquid supply part does not deliver high-pressure oil into the internal chamber 21, the pressure in the internal chamber 21 is stable, the locking rod 3 does not move, the locking rod 3 is in the locked position, the locking rod 3 engages with the mobile cover 11, and the reverse thrust device locking mechanism is in the locked state.

[0100] When the liquid supply part delivers high-pressure oil into the internal chamber 21, a pressure difference is formed in the internal chamber 21, the pressure on the liquid inlet side is greater than the pressure on the liquid outlet side, the locking rod 3 moves along its axial direction towards the side away from the mobile cover 11, the locking rod 3 switches from the locked position to the unlocked position, the locking rod 3 does not engage with the mobile cover 11, and the reverse thrust device locking mechanism is in the unlocked state.

[0101] When the liquid supply part stops delivering high-pressure oil into the internal chamber 21, the pressure in the internal chamber 21 becomes stable, the locking rod 3 moves along its axial direction towards the side of the mobile cover 11, the locking rod 3 switches from the unlocked position to the locked position, the locking rod 3 engages with the mobile cover 11, and the reverse thrust device locking mechanism becomes the locked state.

[0102] When the reverse thrust device does not need to be unfolded, the locking rod 3 engages with the mobile cover 11 to prevent the mobile cover 11 from unfolding, thereby preventing the reverse thrust device from unfolding accidentally and improving safety. When the reverse thrust device needs to be unfolded, the locking rod 3 is moved to the unlocked position, the locking rod 3 does not interfere with the unfolding of the mobile cover 11, thereby ensuring the smooth unfolding of the reverse thrust device and ensuring the normal use of the reverse thrust device. In this embodiment, the movement of the locking rod 3 is driven by hydraulic pressure, the working principle is simple and stable, the structure of hydraulic transmission is simple, no electrical control equipment such as electromagnetic valve needs to be arranged, no complex circuit layout needs to be designed, and the weight is relatively light. The overall structure of the reverse thrust device locking mechanism is simple and easy to assemble, thereby effectively reducing the production and assembly costs.

[0103] As Figures 1-3 shown, the reverse thrust device locking mechanism further comprises a first limiting portion, which is arranged in the inner chamber 21 and is configured to switch between a first position and a second position according to the pressure at the liquid inlet side;

[0104] In the first position, the first limiting portion restricts the movement of the locking rod 3, and the locking rod 3 is in the locked position;

[0105] In the second position, the first limiting portion does not interfere with the movement of the locking rod 3, and the locking rod 3 is in the unlocked position.

[0106] That is, when the first limiting portion is in the first position, the first limiting portion restricts the movement of the locking rod 3 from the locked position to the unlocked position, and the first limiting portion limits the locking rod 3 in the locked position, ensuring that the locking rod 3 is always engaged with the moving cover 11 without being affected by external forces to move, thereby improving safety. When the first limiting portion is in the second position, the first limiting portion does not restrict the movement of the locking rod 3, and the locking rod 3 can switch from the locked position to the unlocked position, so that in the case where the reverse thrust device needs to be deployed, the first limiting portion can be switched to the second position to ensure the normal movement of the locking rod 3.

[0107] The first limiting portion comprises a limiting block 5, and the locking rod 3 has a cooperating portion;

[0108] In the first position, the limiting block 5 engages with the cooperating portion to restrict the movement of the locking rod 3;

[0109] In the second position, the limiting block 5 does not cooperate with the cooperating portion.

[0110] In the first position, the limiting block 5 engages with the cooperating portion to restrict the movement of the locking rod 3;

[0111] The cooperating portion in the present embodiment comprises a limiting groove 4, and the cooperating portion with the limiting groove 4 structure is simple in structure, easy to process and form, and low in cost.

[0112] In the first position, the first end 52 of the limiting block is accommodated in the limiting groove 4, and the limiting block 5 restricts the movement of the locking rod 3 in the axial direction thereof;

[0113] In the second position, the first end 52 of the limiting block moves out of the limiting groove 4, and the limiting block 5 does not interfere with the movement of the locking rod 3 in the axial direction thereof.

[0114] As shown in Figures 1-3 the moving direction of the locking rod 3, the limiting block 5 and the limiting groove 4 are respectively provided with the first matching surface 51 and the second matching surface 41 which are matched with each other on the side close to the second end 32 of the locking rod, and the first matching surface 51 and the second matching surface 41 are both inclined surfaces; from the first end 31 of the locking rod to the second end 32 of the locking rod, the first matching surface 51 and the second matching surface 41 are inclined upward. The design of the inclined surfaces is beneficial to the relative movement between the limiting block 5 and the locking rod 3, and the locking rod 3 can drive the limiting block 5 to move together in the process of moving in the direction away from the moving cover 11, so that a driving mechanism for driving the limiting block 5 to move does not need to be additionally arranged, the overall structure of the locking mechanism of the reverse thrust device is simplified, and the production and assembly costs are reduced. Moreover, the design of the inclined surfaces makes the movement of the limiting block 5 more smooth, reduces the collision of the limiting block 5 in the movement process, and reduces the damage of the limiting block 5.

[0115] As shown in Figure 2 the axis of the locking rod 3 is parallel to the horizontal direction, the matching part is arranged at the upper end of the locking rod 3, the limiting block 5 is located above the locking rod 3, and the limiting block 5 can move up and down. The limiting block 5 can fall to the second position by gravity, so that a driving mechanism for driving the limiting block 5 to switch from the second position to the first position does not need to be additionally arranged, the overall structure of the locking mechanism of the reverse thrust device is simplified, and the production and assembly costs are reduced.

[0116] As shown in Figures 1-3 the locking mechanism of the reverse thrust device further comprises a second limiting part 6, the second limiting part 6 is arranged in the internal cavity 21 and fixed on the inner wall of the shell 2, the second limiting part 6 forms a moving channel 61 with the inner wall of the shell 2, and the limiting block 5 moves in the moving channel 61. The second limiting part 6 is used for limiting the moving direction of the limiting block 5, and the second limiting part 6 in the embodiment cooperates with the inner wall of the shell 2 to limit the movement of the limiting block 5 in the horizontal direction, so that the limiting block 5 basically only moves up and down, the position deviation of the limiting block 5 formed in the movement process is prevented, and the reliability of the movement of the limiting block 5 is improved.

[0117] As shown in Figure 2 the second limiting part 6 extends along the moving direction of the locking rod 3, the second limiting part 6 forms a first space 62 for accommodating the locking rod 3 with the inner wall of the shell 2, and the two ends of the locking rod 3 in the radial direction respectively abut against the second limiting part 6 and the inner wall of the shell 2, so that the second limiting part 6 can limit the moving direction of the locking rod 3 in addition to limiting the moving direction of the limiting block 5, the position deviation of the locking rod 3 formed in the movement process is prevented, and the reliability of the movement of the locking rod 3 is improved. The limiting block 5 and the locking rod 3 share one limiting mechanism, which further simplifies the overall structure of the locking mechanism of the reverse thrust device, and reduces the production and assembly costs.

[0118] wherein, asFigure 2 As shown, in this embodiment, the locking rod 3 extends in the horizontal direction, and the second limiting part 6 is located above the locking rod 3. The second limiting part 6 and the lower end face of the inner wall of the housing 2 respectively abut against the radial ends of the locking rod 3 in the vertical direction, thus jointly restricting the movement of the locking rod 3 in the vertical direction.

[0119] like Figures 1-3 As shown, the reverse thrust device locking mechanism also includes a third limiting part, which is disposed in the internal chamber 21. The third limiting part is configured to switch between a third position and a fourth position according to the pressure on the inlet side.

[0120] In the third position, the third limiting part restricts the movement of the first limiting part, and the first limiting part is in the first position;

[0121] In the fourth position, the third limiting part does not interfere with the movement of the first limiting part, and the first limiting part is in the second position.

[0122] When the third limiting part is in the third position, it restricts the first limiting part from switching from the first position to the second position. The first limiting part is locked in the first position, preventing easy movement of the first limiting part and thus preventing the movement of the locking rod 3, which is limited by the first limiting part, thereby improving the reliability of the thrust reverser locking mechanism. When the third limiting part is in the fourth position, it does not restrict the movement of the first limiting part, allowing the first limiting part to switch from the first position to the second position. This enables the locking rod 3 to switch from the locked position to the unlocked position, ensuring the normal unlocking of the thrust reverser locking mechanism.

[0123] The first limiting part includes a limiting block 5, and the third limiting part includes a limiting rod 7;

[0124] In the third position, the first end 71 of the limiting rod abuts against the second end 53 of the limiting block, and the first end 52 of the limiting block abuts against the locking rod 3.

[0125] In the fourth position, the limiting rod 7 moves away from the limiting block 5 along its axis, and the locking rod 3 pushes the limiting block 5 to move closer to the limiting rod 7.

[0126] The third limiting portion limits the first limiting portion through the cooperation of the limiting block 5 and the limiting rod 7, and the structure and working principle are simple, and the assembly is convenient. The third position and the fourth position of the third limiting portion in the embodiment also correspond to the third position and the fourth position of the limiting rod 7. When the limiting rod 7 is in the third position, the first end 71 of the limiting rod abuts against the second end 53 of the limiting block, and the limiting rod 7 limits the upward movement of the limiting block 5. Since the first end 52 of the limiting block abuts against the locking rod 3, the locking rod 3 cannot move when the limiting block 5 cannot move upward, and the locking rod 3 is always in the locked position. When the limiting rod 7 is switched to the fourth position, the limiting rod 7 is away from the limiting block 5, and the limiting block 5 can move upward without being blocked by the limiting rod 7, so that the locking rod 3 can also move, and is switched from the locked position to the unlocked position.

[0127] As shown in Figure 2 , the second limiting portion 6 and the inner wall of the shell 2 further form a second space 63 for accommodating the limiting rod 7, and the second space 63 is located above the first space 62. The axes of the limiting rod 7 and the locking rod 3 are parallel, the limiting rod 7 is located above the locking rod 3, and the radially opposite ends of the limiting rod 7 in the upward and downward directions abut against the upper end surface of the inner wall of the shell 2 and the second limiting portion 6, respectively. The second limiting portion 6 can further limit the movement direction of the limiting rod 7, prevent the position deviation of the limiting rod 7 during movement, and improve the reliability of the movement of the limiting rod 7.

[0128] As shown in Figure 2 , the reverse thrust device locking mechanism further comprises a first elastic member 82 arranged in the internal cavity 21 and abutting against the second end 72 of the limiting rod, and the first elastic member 82 is used for biasing the limiting rod 7 so that the first end 71 of the limiting rod abuts against the second end 53 of the limiting block. The first elastic member 82 is used for resetting the limiting rod 7, so that the limiting rod 7 can be automatically switched from the fourth position to the third position when the reverse thrust device locking mechanism is not working. The structure of the first elastic member 82 is simple, and no additional resetting device for the limiting rod 7 is needed, which simplifies the overall structure of the reverse thrust device locking mechanism and reduces the production and assembly costs.

[0129] As shown in Figure 2 , the reverse thrust device locking mechanism further comprises a second elastic member 81 arranged in the internal cavity 21 and abutting against the first end 31 of the locking rod, and the second elastic member 81 is used for biasing the locking rod 3 so that the second end 32 of the locking rod engages with the moving cover 11. The second elastic member 81 is used for resetting the locking rod 3, so that the locking rod 3 can be automatically switched from the unlocked position to the locked position when the reverse thrust device locking mechanism is not working. The structure of the second elastic member 81 is simple, and no additional resetting device for the locking rod 3 is needed, which simplifies the overall structure of the reverse thrust device locking mechanism and reduces the production and assembly costs.

[0130] The locking rod 3 and the limiting block 5 in the embodiment are both moved by the pressure difference between the liquid inlet side and the liquid outlet side in the internal chamber 21, and are reset under the action force of the second elastic member 81 and the first elastic member 82 respectively, without the need to additionally design a complex driving mechanism and a reversing mechanism, greatly simplifying the structure of the locking mechanism of the reverse thrust device, and reducing the production and assembly costs.

[0131] The first elastic member 82 and the second elastic member 81 in the embodiment are both helical springs, which have simple structure and low cost. In other alternative embodiments, the first elastic member 82 and the second elastic member 81 can also be selected from other elastic members capable of achieving the above functions.

[0132] The first elastic member 82 and the second elastic member 81 are arranged close to the liquid outlet 23. Since the first elastic member 82 and the second elastic member 81 are both helical springs, they are more susceptible to the flow direction of high-pressure oil, and are offset in the radial direction of the helical spring. The greater the flow of high-pressure oil, the more serious the offset. Therefore, the locking mechanism of the reverse thrust device further comprises a flow limiting portion 9. The flow limiting portion 9 is arranged in the internal chamber 21, and is arranged close to the liquid outlet 23 relative to the locking rod 3 along the liquid flow direction in the internal chamber 21. The flow limiting portion 9 cooperates with the second limiting portion 6 to form a flow limiting channel 91, which is located between the second elastic member 81 and the liquid outlet 23, and the position of the flow limiting channel 91 corresponds to the positions of the second elastic member 81 and the liquid outlet 23. The flow limiting portion 9 is used to reduce the flow of liquid on one side of the first elastic member 82 and the second elastic member 81, prevent the position of the first elastic member 82 and the second elastic member 81 from being offset due to excessive liquid flow, and ensure that the first elastic member 82 can normally bias the limiting rod 7 and the second elastic member 81 can normally bias the locking rod 3. In the embodiment, the position of the flow limiting channel 91 corresponding to the positions of the second elastic member 81 and the liquid outlet 23 means that the position of the flow limiting channel 91 is directly above the second elastic member 81 and close to the lower side of the liquid outlet 23.

[0133] As shown in Figures 1-3 the moving direction of the locking rod 3, the liquid inlet 22 is arranged close to the second end 32 of the locking rod relative to the liquid outlet 23. The liquid inlet 22 is used to deliver liquid to the internal chamber 21, and the liquid outlet 23 is used to output the liquid in the internal chamber 21. Therefore, during the use of the locking mechanism of the reverse thrust device, the liquid pressure on the side of the liquid inlet 22 is greater than the liquid pressure on the side of the liquid outlet 23. The above arrangement enables the locking rod 3 to move in the correct direction according to the liquid pressure.

[0134] The liquid inlet 22 and the liquid outlet 23 are arranged on the upper end surface of the shell 2, and are arranged along the moving direction of the locking rod 3, so as to prevent the liquid inlet 22 and the liquid outlet 23 from interfering with the locking beam 12 of the aero-engine, affecting the normal entry and exit of the liquid into the internal cavity 21 of the shell 2, and improving the feasibility of the reverse thrust device locking mechanism. In addition, the moving direction of the locking rod 3 can be ensured, and the locking rod 3 can normally lock or unlock the moving cover 11, thereby improving the reliability of the reverse thrust device locking mechanism.

[0135] As shown in Figure 1 , the reverse thrust device locking mechanism further comprises a fourth limiting portion 100 arranged on the lower end surface of the inner wall of the shell 2. The fourth limiting portion 100 cooperates with the side surface of the inner wall of the shell 2 to limit the movement of the locking rod 3 in the front-rear direction, further limit the moving direction of the locking rod 3, and prevent the locking rod 3 from deviating during movement. Further, the reverse thrust device locking mechanism can further comprise a fifth limiting portion for limiting the front-rear movement of the limiting rod 7.

[0136] As shown in Figure 1 , the reverse thrust device locking mechanism further comprises a liquid inlet connector 101 connected to the liquid inlet 22 and connected to the liquid supply portion, and a liquid outlet connector 102 connected to the liquid outlet 23 and connected to the outside. The high-pressure oil flowing out of the liquid outlet 23 can be directly recycled or discarded, or can directly flow back to the liquid supply portion for recycling, thereby reducing the cost.

[0137] As shown in Figure 1 , the reverse thrust device locking mechanism further comprises a mounting lug 103 fixed on the outer surface of the shell 2 and located on the side of the shell 2 close to the locking beam 12 of the aero-engine. The mounting lug 103 is provided with a mounting hole 104, and the locking beam 12 is provided with a connecting hole corresponding to the mounting lug 103. A connecting member passes through the mounting hole 104 on the mounting lug 103 and the connecting hole on the locking beam 12 to fix the shell 2 on the locking beam 12. The fixing mode of the connecting member is simple in structure and firm in fixation, so as to ensure that the shell 2 can remain stationary relative to the locking beam 12, and ensure the stability of the reverse thrust device locking mechanism during use. In other alternative embodiments, the shell 2 can also be fixed relative to the locking beam 12 by other fixing modes, such as welding.

[0138] The working principle of the reverse thrust device locking mechanism will be briefly described below according to the specific structure of the reverse thrust device locking mechanism in the above embodiment.

[0139] As shown in Figure 3As shown, during the process of switching the locking mechanism of the reverse thrust device from the locked state to the unlocked state, the liquid supply unit inputs high-pressure oil into the internal chamber 21 of the housing 2 through the liquid inlet 22 of the housing 2, and the liquid outlet 23 of the housing 2 transports the excess high-pressure oil out of the internal chamber 21, ensuring a stable amount of high-pressure oil in the internal chamber 21. The liquid pressure on the liquid inlet side of the internal chamber 21 is greater than the liquid pressure on the liquid outlet side. Under the action of the pressure difference, the limiting rod 7 moves towards the liquid outlet side and compresses the first elastic element 82. The first end 71 of the limiting rod gradually separates from the second end 53 of the limiting block until they are completely separated. There is no obstruction above the limiting block 5, and the limiting block 5 can move upward. At this time, the limiting block 5 does not play the role of restricting the movement of the locking rod 3 in its axial direction. The locking rod 3 can also move towards the outlet side under the pressure difference between the inlet side and the outlet side and compress the second elastic element 81. The second end 32 of the locking rod is pulled out from the locking hole 111 on the movable outer cover 11. The locking rod 3 is separated from the movable outer cover 11. During the process of moving towards the outlet side, the locking rod 3 pushes the limiting block 5 to move upward.

[0140] like Figure 2 As shown, during the process of switching the locking mechanism of the reverse thrust device from the unlocked state to the locked state, the liquid supply unit stops supplying liquid to the internal chamber 21, and the liquid outlet 23 also stops discharging liquid, resulting in the same pressure on the inlet and outlet sides of the internal chamber 21. The second elastic element 81 applies a force toward the movable outer cover 11 to the locking rod 3, and the second end 32 of the locking rod extends into the locking hole 111 on the movable outer cover 11 to engage with the movable outer cover 11. When the limiting groove 4 on the locking rod 3 moves directly below the limiting block 5, the limiting block 5 moves downward under the influence of gravity until the first end 52 of the limiting block is accommodated in the limiting groove 4. The first elastic element 82 applies a force toward the inlet side to the limiting rod 7, and the first end 71 of the limiting rod gradually abuts against the second end 53 of the limiting block, thereby restricting the upward movement of the limiting block 5.

[0141] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0142] Although the specific embodiments of the present application have been described above, it is understood by those skilled in the art that the present application is only illustrated by way of example, and the scope of protection of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to the embodiments without departing from the principles and essence of the present application, and such changes and modifications fall within the scope of protection of the present application.

Claims

1. A reverse thrust device locking mechanism for locking a moving outer cover of an aeroengine, characterized in that, The reverse thrust device locking mechanism comprises: a housing comprising an internal chamber, a liquid inlet and a liquid outlet, the internal chamber, the liquid inlet and the liquid outlet being in communication; a liquid supply part connected to the liquid inlet for supplying liquid to the internal chamber; a locking rod, a first end of the locking rod being arranged in the internal chamber, a second end of the locking rod extending to the outside of the housing and being capable of engaging with the mobile cover, the locking rod being arranged to switch between a locking position and an unlocking position according to the pressure on the side of the liquid inlet; in the locking position, the locking rod engages with the mobile cover, and the reverse thrust device locking mechanism is in a locked state; in the unlocking position, the locking rod moves along its axial direction towards the side away from the mobile cover, and the reverse thrust device locking mechanism is in an unlocked state; the reverse thrust device locking mechanism further comprises a first limiting part arranged in the internal chamber, the first limiting part being arranged to switch between a first position and a second position according to the pressure on the side of the liquid inlet; in the first position, the first limiting part limits the movement of the locking rod, and the locking rod is in the locking position; in the second position, the first limiting part does not interfere with the movement of the locking rod, and the locking rod is in the unlocking position; the reverse thrust device locking mechanism further comprises a third limiting part arranged in the internal chamber, the third limiting part being arranged to switch between a third position and a fourth position according to the pressure on the side of the liquid inlet; in the third position, the third limiting part limits the movement of the first limiting part, and the first limiting part is in the first position; in the fourth position, the third limiting part does not interfere with the movement of the first limiting part, and the first limiting part is in the second position.

2. The reverse thrust device locking mechanism of claim 1, wherein, The first limiting part comprises a limiting block, and the locking rod has a matching part; in the first position, the limiting block engages with the matching part to limit the movement of the locking rod; in the second position, the limiting block does not match with the matching part.

3. The reverse thrust device locking mechanism of claim 2, wherein, The matching part comprises a limiting groove; in the first position, a first end of the limiting block is contained in the limiting groove, and the limiting block limits the movement of the locking rod in its axial direction; in the second position, the first end of the limiting block moves out of the limiting groove, and the limiting block does not interfere with the movement of the locking rod in its axial direction.

4. The reverse thrust device locking mechanism of claim 3, wherein, In the direction of the movement of the locking rod, the limiting block and the limiting groove respectively have a first matching surface and a second matching surface close to one side of the second end of the locking rod, and the first matching surface and the second matching surface are both inclined surfaces; In the direction from the first end of the locking rod towards the second end of the locking rod, the first matching surface and the second matching surface are upwardly inclined.

5. The reverse thrust device locking mechanism of claim 2, wherein, The axis of the locking rod is parallel to the horizontal direction, the matching part is arranged at the upper end of the locking rod, the limiting block is located above the locking rod, and the limiting block is capable of moving up and down.

6. The reverse thrust device locking mechanism of claim 2, wherein, The reverse thrust device locking mechanism further comprises a second limiting portion arranged in the inner chamber, the second limiting portion and the inner wall of the shell form a moving channel for the limiting block.

7. The reverse thrust device locking mechanism of claim 6, wherein, The second limiting portion extends along the moving direction of the locking rod, and the second limiting portion and the inner wall of the shell form a first space for accommodating the locking rod, and the two ends of the locking rod in the radial direction abut against the second limiting portion and the inner wall of the shell, respectively.

8. The reverse thrust device locking mechanism of claim 1, wherein, The first limiting portion comprises a limiting block, and the third limiting portion comprises a limiting rod; In the third position, the first end of the limiting rod abuts against the second end of the limiting block, and the first end of the limiting block abuts against the locking rod; In the fourth position, the limiting rod moves along its axial direction towards a direction away from the limiting block, and the locking rod pushes the limiting block to move towards a direction close to the limiting rod.

9. The reverse thrust device locking mechanism of claim 8, wherein, The reverse thrust device locking mechanism further comprises a first elastic member arranged in the inner chamber and abutting against the second end of the limiting rod, the first elastic member is used to bias the limiting rod so that the first end of the limiting rod abuts against the second end of the limiting block.

10. The reverse thrust device locking mechanism of claim 1, wherein, The reverse thrust device locking mechanism further comprises a second elastic member arranged in the inner chamber and abutting against the first end of the locking rod, the second elastic member is used to bias the locking rod so that the second end of the locking rod engages with the moving cover.

11. The reverse thrust device locking mechanism of claim 10, wherein, The reverse thrust device locking mechanism further comprises a flow limiting portion arranged in the inner chamber, along the liquid flow direction in the inner chamber, the flow limiting portion is arranged close to the liquid outlet with respect to the locking rod; the flow limiting portion forms a flow limiting channel, the flow limiting channel is located between the second elastic member and the liquid outlet, and the position of the flow limiting channel corresponds to the positions of the second elastic member and the liquid outlet.

12. The reverse thrust device locking mechanism of claim 1, wherein, Along the moving direction of the locking rod, the liquid inlet is arranged close to the second end of the locking rod with respect to the liquid outlet.

13. The reverse thrust device locking mechanism of claim 12, wherein, The liquid inlet and the liquid outlet are both arranged on the upper end surface of the shell, and the liquid inlet and the liquid outlet are arranged along the moving direction of the locking rod.

14. An aeroengine characterised in that, The aero-engine comprises a locking beam and the reverse thrust device locking mechanism according to any one of claims 1-13, and the shell is fixed on the locking beam.

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