Reverse thrust opening actuator of aero-engine

Abstract

The utility model discloses a reverse thrust opening actuator of an aero-engine, and relates to the technical field of ground inspection and maintenance of aero-engines. The hydraulic cylinder comprises a cylinder barrel assembly, a one-way throttle valve, a quick-release self-sealing valve, a large piston rod and a small piston rod, the left end of the cylinder barrel assembly is connected with the one-way throttle valve, a large piston rod sleeve is arranged at the right end of the cylinder barrel assembly, and the quick-release self-sealing valve is connected with the one-way throttle valve; the piston end of the large piston rod faces the bottom of the center hole of the cylinder barrel assembly, and the piston rod end of the large piston rod faces the outside of the center hole of the cylinder barrel assembly and is provided with a small piston rod sleeve; the small piston rod is located in the large piston rod center hole, the piston end of the small piston rod faces the bottom of the large piston rod center hole, and the piston rod end of the small piston rod faces the outside of the large piston rod center hole and is provided with a rod end nut. And the rod end nut is connected with the adjusting rod end. The device can be conveniently mounted and dismounted in the engine nacelle.

Description

Technical Field

[0001] The utility model relates to the technical field of ground inspection and maintenance of aircraft engines, and more specifically to an aircraft engine reverse thrust opening actuator. Background Art

[0002] When inspecting and maintaining the reverse thrust and the engine on the ground, the reverse thrust needs to be opened to work. The reverse thrust opening actuator is used for ground inspection and maintenance of the reverse thrust and the engine, and the reverse thrust is opened and closed laterally by extending and shortening.

[0003] At present, the thrust reverser opening actuator is developing towards high pressure, large load capacity, wide range of motion, high sealing requirements, strong safety and reliability, miniaturization and lightweight; most aircraft engine thrust reverser suppliers are involved in the relevant business of thrust reverser opening actuator, such as France's SAFRAN, the United States' Goodrich and United Technologies Corporation (UTC).

[0004] my country's civil aviation engine research and development started late, and the production technology and equipment owned by local enterprises are relatively backward, resulting in a high degree of dependence on imports for the domestic thrust reverser market.

[0005] Therefore, it is necessary to develop an aircraft engine reverse thrust opening actuator that can be easily installed and disassembled in the engine nacelle, has a large stroke, is lightweight, and is miniaturized. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to provide an aircraft engine reverse thrust opening actuator.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: an aircraft engine reverse thrust opening actuator, characterized in that it includes a cylinder assembly, a one-way throttle valve, a quick-release self-sealing valve, a large piston rod, and a small piston rod, wherein the left end of the cylinder assembly is connected to the one-way throttle valve, and the right end is provided with a large piston rod sleeve, and the quick-release self-sealing valve is connected to the one-way throttle valve;

[0008] The large piston rod is located in the center hole of the cylinder assembly, the piston end of the large piston rod faces the bottom of the center hole of the cylinder assembly, the piston rod end of the large piston rod faces outside the center hole of the cylinder assembly and a small piston rod sleeve is provided;

[0009] The small piston rod is located in the center hole of the large piston rod, the piston end of the small piston rod faces the bottom of the center hole of the large piston rod, the piston rod end of the small piston rod faces the outside of the center hole of the large piston rod and is provided with a rod end nut;

[0010] The rod end nut is connected to the adjustment rod end.

[0011] In the above technical solution, the left end of the cylinder assembly and the end of the adjustment rod are both provided with radial spherical bearings.

[0012] In the above technical solution, an electric jumper wire and an energy storage device are arranged on the upper side of the left end of the cylinder assembly, and the electric jumper wire is connected to the engine; the energy storage device includes an upper end cover, a clamping half ring located at the bottom of the upper end cover, a spring seat with one end passing through the upper end cover and the other end connected to the lower end cover, an energy storage device sealing assembly located at the bottom of the lower end cover, and an energy storage spring mounted on the spring seat, with one end connected to the upper end cover and the other end connected to the lower end cover.

[0013] In the above technical solution, a pressure relief valve is arranged on the upper side of the right end of the cylinder assembly, and the pressure relief valve includes a pressure relief valve plug, a pressure relief valve seat with the top located in the pressure relief valve plug and the bottom located in the pressure relief valve support, a pressure relief valve spring seat located in the pressure relief valve support, a steel ball guide sleeve located at the bottom of the pressure relief valve support, a steel ball located in the steel ball guide sleeve, a pressure relief valve core with one end slidably connected to the bottom of the pressure relief valve seat and the other end connected to the pressure relief valve spring seat, and a pressure relief valve spring sleeved on the pressure relief valve spring seat;

[0014] The upper surface of the steel ball contacts the bottom of the pressure relief valve spring seat.

[0015] In the above technical solution, it also includes a buffer assembly, which includes a buffer spring seat connected to the piston end of the small piston rod, a buffer spring with one end connected to the buffer spring seat and the other end connected to the buffer rod sealing assembly of the buffer rod; the buffer rod matches the center hole of the large piston rod.

[0016] In the above technical solution, the quick-release self-sealing valve includes a valve body, a nozzle located in the valve body, and a quick-release self-sealing valve core located in the nozzle. The quick-release self-sealing valve core is sequentially provided with a seal, a retaining ring, a spring, and a quick-release self-sealing valve seat from left to right.

[0017] In the above technical scheme, the one-way throttle valve includes a one-way throttle valve seat, a wire filter and a tightening spring mounted on the one-way throttle valve seat, a one-way throttle valve core located in the one-way throttle valve seat, a clamping ring and a small one-way throttle valve spring arranged in the one-way throttle valve core from left to right, a large one-way throttle valve spring located in the one-way throttle valve seat and connected to the left end of the one-way throttle valve core, and a damping hole located in the one-way throttle valve seat and connected to the right end of the one-way throttle valve core.

[0018] In the above technical solution, a dust cover is detachably provided at the left end of the quick-release self-sealing valve, and the dust cover is connected to the cylinder assembly.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1) The utility model can be conveniently installed and disassembled in the engine nacelle.

[0021] 2) The utility model is provided with a two-stage piston rod, which is lightweight and miniaturized, ensuring that the reverse thrust in the deployed state can achieve a larger opening angle while satisfying a smaller installation space in the retracted state.

[0022] 3) The utility model is provided with an electrical connection wire, the two ends of which are connected to the actuator and the engine respectively, to avoid or slow down the electrochemical corrosion between the components of different materials in contact with each other.

[0023] 4) The utility model is provided with a quick-release self-sealing valve and a one-way throttle valve to ensure that the one-way hydraulic oil injection drive can be deployed while meeting the functional requirements of slow oil return and retraction.

[0024] 5) The utility model has a large design bearing capacity, and at the same time, by setting a two-stage pressure relief valve, pressure relief is guaranteed when overloaded, which is safe and reliable.

[0025] 6) The utility model is provided with an energy storage device to eliminate the influence of thermal expansion and is applicable to a wide range of working environment temperatures; the buffer device is provided to reduce the impact and damage of the relatively moving parts during the actuation process.

[0026] 7) The utility model meets the airworthiness requirements, has a reliable structure, strong practicality, complete functions, and is easy to use and promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model.

[0028] Figure 2 It is an exploded view of the utility model.

[0029] Figure 3 This is an exploded view of the quick-release self-sealing valve.

[0030] Figure 4 This is an exploded view of a one-way throttle valve.

[0031] Figure 5 It is a structural schematic diagram of the energy storage device.

[0032] Figure 6 It is a structural diagram of the pressure relief valve.

[0033] Figure 7 A schematic diagram of the structure of the buffer device.

[0034] Among them, 1-cylinder assembly, 11-large piston rod sleeve, 12-electric lap wire, 2-one-way throttle valve, 21-one-way throttle valve seat, 22-wire filter, 23-tightening spring, 24-one-way throttle valve core, 25-clamp ring, 26-one-way throttle valve small spring, 27-one-way throttle valve large spring, 28-damping hole, 3-quick release self-sealing valve, 31-valve body, 32-nozzle, 33-quick release self-sealing valve core, 34-seal, 35-blocking ring, 36-spring, 37-quick release self-sealing valve seat, 38-dust cover, 4-large piston rod, 41-small piston rod sleeve, 5-small piston rod, 51 -rod end nut, 52-adjusting rod end, 53-rod end sleeve, 6-radial spherical bearing, 7-energy storage device, 71-upper end cover, 72-clamping half ring, 73-spring seat, 74-lower end cover, 75-energy storage device sealing assembly, 76-energy storage spring, 8-pressure relief valve, 81-pressure relief valve screw plug, 82-pressure relief valve seat, 83-pressure relief valve support, 84-pressure relief valve spring seat, 85-steel ball guide sleeve, 86-steel ball, 87-pressure relief valve core, 88-pressure relief valve spring, 9-buffer assembly, 91-buffer spring seat, 92-buffer spring, 93-buffer rod, 931-buffer rod sealing assembly. DETAILED DESCRIPTION

[0035] The following is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but they do not constitute a limitation of the utility model and are only used as examples. At the same time, the advantages of the utility model will become clearer and easier to understand through the description.

[0036] Referring to the attached drawings, it can be seen that: an aircraft engine reverse thrust opening actuator, characterized in that it includes a cylinder assembly 1, a one-way throttle valve 2, a quick-release self-sealing valve 3, a large piston rod 4, and a small piston rod 5. The oil inlet and outlet ends of the cylinder assembly 1 are connected to the one-way throttle valve 2, and the right end is provided with a large piston rod sleeve 11 through threaded matching, and the quick-release self-sealing valve 3 is threadedly connected to the one-way throttle valve 2;

[0037] The large piston rod 4 is located in the center hole of the cylinder assembly 1, the piston end of the large piston rod 4 faces the bottom of the center hole of the cylinder assembly 1, and the piston rod end of the large piston rod 4 faces the outside of the center hole of the cylinder assembly 1 and is provided with a small piston rod sleeve 41;

[0038] The small piston rod 5 is located in the center hole of the large piston rod 4, the piston end of the small piston rod 5 faces the bottom of the center hole of the large piston rod 4, the piston rod end of the small piston rod 5 faces the outside of the center hole of the large piston rod 4 and is provided with a rod end sleeve 53, and the rod end sleeve 53 is connected to the rod end nut 51;

[0039] The rod end nut 51 is connected to the adjustment rod end 52, and the adjustment rod end 52 is fixed to the small piston rod 5 through the rod end nut 51;

[0040] The utility model is unidirectionally hydraulically driven (externally connected to a hydraulic oil source); a two-stage piston rod is arranged, a large piston rod 4 is installed in a cylinder assembly 1, and a small piston rod 5 is installed in the large piston rod 1; a quick-release self-sealing valve 3 is unidirectionally opened when working, and has a sealing and pressure-maintaining function in a non-working state; a one-way throttle valve 2 controls the reverse thrust retraction time within 20s-30s.

[0041] The left end of the cylinder assembly 1 and the adjustment rod end 52 are both provided with radial spherical bearings 6 as external interfaces.

[0042] An electrical jumper 12 and an energy storage device 7 are provided on the upper side of the left end of the cylinder assembly 1; the electrical jumper 12 is connected to the engine to prevent electrochemical corrosion between the connecting parts; the energy storage device 7 includes an upper end cover 71, a clamping half ring 72 located at the bottom of the upper end cover 71, a spring seat 73 with one end penetrating the upper end cover 71 and the other end connected to the lower end cover 74, an energy storage device sealing assembly 75 located at the bottom of the lower end cover 74, and an energy storage spring 76 sleeved on the spring seat 73, one end connected to the upper end cover 71 and the other end connected to the lower end cover 74; the lower end cover 74 moves up and down in the energy storage chamber under the action of hydraulic pressure and the energy storage spring 76 pressure to balance the internal structure pressure; the energy storage spring 76 supports the lower end cover 74 to control the volume of the energy storage chamber to eliminate the thermal expansion effect of the internal residual oil when the ambient temperature changes from -55°C to +135°C.

[0043] A pressure relief valve 8 is provided on the upper side of the right end of the cylinder assembly 1, and the pressure relief valve 8 includes a pressure relief valve plug 81, a pressure relief valve seat 82 with the top located in the pressure relief valve plug 81 and the bottom located in the pressure relief valve support 83, a pressure relief valve spring seat 84 located in the pressure relief valve support 83, a steel ball guide sleeve 85 located at the bottom of the pressure relief valve support 83, a steel ball 86 located in the steel ball guide sleeve 85, a pressure relief valve core 87 with one end slidably connected to the bottom of the pressure relief valve seat 82 and the other end connected to the pressure relief valve spring seat 84, and a pressure relief valve spring 88 sleeved on the pressure relief valve spring seat 84;

[0044] The upper surface of the steel ball 86 contacts the bottom of the pressure relief valve spring seat 84;

[0045] The pressure relief valve 8 sets a secondary pressure relief point through the position of the steel ball 86. When the internal pressure exceeds the pressure relief pressure of the pressure relief valve, the pressure relief valve core 87 will be activated to relieve pressure, thereby protecting the main structure or the external structure from overload.

[0046] It also includes a buffer component 9, which includes a buffer spring seat 91 connected to the piston end of the small piston rod 5, and a buffer spring 92 whose one end is connected to the buffer spring seat 91 and the other end is connected to the buffer rod sealing assembly 931 of the buffer rod 93; the buffer rod 93 matches the center hole of the large piston rod 4; the buffer component 9 is provided with a buffer spring 92 to buffer the deceleration when the load is retracted and reduce the contact impact; when the piston rod is retracted, the buffer rod 93 first contacts the bottom of the cylinder assembly, and the piston is decelerated and bottomed out through the compression of the buffer spring 92.

[0047] The quick-release self-sealing valve 3 comprises a valve body 31, a nozzle 32 located in the valve body 31, and a quick-release self-sealing valve core 33 located in the nozzle 32. The quick-release self-sealing valve core 33 is provided with a seal 34, a retaining ring 35, a spring 36, and a quick-release self-sealing valve seat 37 in sequence from left to right.

[0048] The seal 34 is embedded in the inner diameter groove of the retaining ring 35 and penetrates the guide rod of the quick-release self-sealing valve core 33. The seal 34 is sleeved on the conical surface of the quick-release self-sealing valve core 33 and installed on the conical surface of the quick-release self-sealing valve core 33. The valve body 31 is connected with the nozzle 32 by interference fit.

[0049] The quick-release self-sealing valve 3 is a hydraulic input interface, which can achieve a sealing and pressure-maintaining effect by cutting off the input hydraulic pressure.

[0050] The one-way throttle valve 2 includes a one-way throttle valve seat 21, a wire filter 22 and a tightening spring 23 mounted on the one-way throttle valve seat 21, a one-way throttle valve core 24 located in the one-way throttle valve seat 21, a clamping ring 25 and a small one-way throttle valve spring 26 located in the one-way throttle valve core 24 and arranged from left to right, a large one-way throttle valve spring 27 located in the one-way throttle valve seat 21 and connected to the left end of the one-way throttle valve core 24, and a damping hole 28 located in the one-way throttle valve seat 21 and connected to the right end of the one-way throttle valve core 24; the one-way throttle valve 2 controls the piston rod retraction rate under load through the damping hole 28.

[0051] The oil inlet and outlet nozzles 32 of the quick-release self-sealing valve 3 are detachably provided with dust covers 38 , which are connected to the cylinder assembly 1 by screws and can be easily installed and removed.

[0052] In actual use, when the quick-release self-sealing valve 3 is working, the input hydraulic pressure pushes and opens the quick-release self-sealing valve core 33, and the pressure oil enters the internal structure of the actuator to drive the piston rod; when the work is stopped, the hydraulic oil source connector is cut off, and the spring 36 rebounds and compresses the quick-release self-sealing valve core 33. The seal 34 installed on the conical surface of the quick-release self-sealing valve core 33 contacts the valve body 31 under the action of the spring force to maintain the seal.

[0053] The upper end cover 71 of the energy storage device 7 remains stationary under the elastic force of the clamping half ring 72 and the energy storage spring 76. When hydraulically driven, the lower end cover 74 and the spring seat 73 are hydraulically lifted, and the guide rod of the spring seat 73 extends out from the center hole of the upper end cover 71. The surface of the spring seat 73 is anodized red with sulfuric acid. The extension of the red guide rod shows that the internal pressure of the actuator is maintained.

[0054] When the buffer rod 93 contacts the bottom of the center hole of the cylinder assembly 1, the buffer spring 92 is compressed and the piston rod is decelerated and retracted.

[0055] Other parts not described belong to the prior art.

Claims

1. An aircraft engine reverse thrust opening actuator, characterized in that: It comprises a cylinder assembly (1), a one-way throttle valve (2), a quick-release self-sealing valve (3), a large piston rod (4), and a small piston rod (5); the left end of the cylinder assembly (1) is connected to the one-way throttle valve (2), and the right end is provided with a large piston rod sleeve (11); the quick-release self-sealing valve (3) is connected to the one-way throttle valve (2); The large piston rod (4) is located in the center hole of the cylinder assembly (1), the piston end of the large piston rod (4) faces the bottom of the center hole of the cylinder assembly (1), the piston rod end of the large piston rod (4) faces outside the center hole of the cylinder assembly (1) and a small piston rod sleeve (41) is provided; The small piston rod (5) is located in the center hole of the large piston rod (4), the piston end of the small piston rod (5) faces the bottom of the center hole of the large piston rod (4), the piston rod end of the small piston rod (5) faces the outside of the center hole of the large piston rod (4) and is provided with a rod end nut (51); The rod end nut (51) is connected to the adjustment rod end (52).

2. The aircraft engine reverse thrust opening actuator according to claim 1, characterized in that: The left end of the cylinder assembly (1) and the adjustment rod end (52) are both provided with radial spherical bearings (6).

3. An aircraft engine reverse thrust opening actuator according to claim 1 or 2, characterized in that: An electrical jumper (12) and an energy storage device (7) are arranged on the upper side of the left end of the cylinder assembly (1), and the electrical jumper (12) is connected to the engine; the energy storage device (7) comprises an upper end cover (71), a clamping half ring (72) located at the bottom of the upper end cover (71), a spring seat (73) with one end penetrating the upper end cover (71) and the other end connected to the lower end cover (74), an energy storage device sealing assembly (75) located at the bottom of the lower end cover (74), and an energy storage spring (76) sleeved on the spring seat (73), with one end connected to the upper end cover (71) and the other end connected to the lower end cover (74).

4. The aircraft engine reverse thrust opening actuator according to claim 3, characterized in that: A pressure relief valve (8) is arranged on the upper right side of the cylinder assembly (1), and the pressure relief valve (8) comprises a pressure relief valve screw plug (81), a pressure relief valve seat (82) with the top located in the pressure relief valve screw plug (81) and the bottom located in the pressure relief valve support (83), a pressure relief valve spring seat (84) located in the pressure relief valve support (83), a steel ball guide sleeve (85) located at the bottom of the pressure relief valve support (83), a steel ball (86) located in the steel ball guide sleeve (85), a pressure relief valve core (87) with one end slidably connected to the bottom of the pressure relief valve seat (82) and the other end connected to the pressure relief valve spring seat (84), and a pressure relief valve spring (88) sleeved on the pressure relief valve spring seat (84); The upper surface of the steel ball (86) contacts the bottom of the pressure relief valve spring seat (84).

5. The aircraft engine reverse thrust opening actuator according to claim 1, characterized in that: It also includes a buffer assembly (9), which includes a buffer spring seat (91) connected to the piston end of the small piston rod (5), and a buffer spring (92) having one end connected to the buffer spring seat (91) and the other end connected to the buffer rod sealing assembly (931) of the buffer rod (93); the buffer rod (93) matches the center hole of the large piston rod (4).

6. The aircraft engine reverse thrust opening actuator according to claim 1, characterized in that: The quick-release self-sealing valve (3) comprises a valve body (31), a nozzle (32) located in the valve body (31), and a quick-release self-sealing valve core (33) located in the nozzle (32). The quick-release self-sealing valve core (33) is provided with a seal (34), a retaining ring (35), a spring (36), and a quick-release self-sealing valve seat (37) in sequence from left to right.

7. The aircraft engine reverse thrust opening actuator according to claim 6, characterized in that: The one-way throttle valve (2) comprises a one-way throttle valve seat (21), a steel wire filter (22) and a clamping spring (23) mounted on the one-way throttle valve seat (21), a one-way throttle valve core (24) located in the one-way throttle valve seat (21), a clamping ring (25) and a one-way throttle valve small spring (26) arranged in sequence from left to right in the one-way throttle valve core (24), a one-way throttle valve large spring (27) located in the one-way throttle valve seat (21) and connected to the left end of the one-way throttle valve core (24), and a damping hole (28) located in the one-way throttle valve seat (21) and connected to the right end of the one-way throttle valve core (24).

8. The aircraft engine reverse thrust opening actuator according to claim 1, characterized in that: The left end of the quick-release self-sealing valve (3) is detachably provided with a dust cover (38), and the dust cover (38) is connected to the cylinder assembly (1).

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