Aircraft engine reverse thrust device inspection apparatus

Abstract

The application discloses an aero-engine reverse thrust device inspection equipment, which comprises a mounting shell, an oil supply system, an air charging system and a control system. The oil supply system, the air charging system and the control system are integrated and arranged on the mounting shell, and the control system is used for scheduling control of the oil supply system and the air charging system. Therefore, the three inspection items can be completed on the same station, the interface pipeline does not need to be repeatedly disassembled and assembled, the equipment is prevented from being frequently transferred between different stations, the connection between the inspections is smooth, the inspection efficiency is greatly improved, the inspection period is shortened, and the inspection cost is reduced. Three inspections are completed by using a single equipment, and maintenance personnel can complete the three inspections by issuing an instruction through the control system, so that the equipment types are reduced, and the operation complexity is reduced. Moreover, the air charging system is used for fully utilizing the residual air in an external air source (for example, a nitrogen cylinder), so that the residual air is not wasted.

Description

Technical Field

[0001] This invention relates to the field of aircraft engine inspection technology, and in particular, to an inspection device for aircraft engine thrust reversers. Background Technology

[0002] Thrust reversers are crucial components of aircraft engines, enabling rapid deceleration of the aircraft during landing and shortening the landing distance. Therefore, the reliability of the thrust reverser directly impacts flight safety, and a comprehensive inspection of the thrust reverser is essential before installation on a new aircraft or after engine overhaul. Three key inspection items include checking the thrust reverser activation response time, the hydraulic actuator sealing, and the accumulator charging.

[0003] The thrust reverser activation response time check verifies whether the thrust reverser can complete the deployment or retraction action within the specified time. If the response time exceeds the standard, it may indicate air in the oil supply system, hydraulic actuator failure or asynchrony, damage to the synchronization shaft, or incorrect installation, directly affecting the thrust reverser's timely response capability. The hydraulic actuator sealing check aims to prevent hydraulic oil leakage from causing thrust reverser failure or even serious safety issues such as fire. The accumulator charging check verifies whether the current pressure of the pre-charged nitrogen in the accumulator meets the standards specified in the manual, and replenishes the nitrogen if the pressure is insufficient, ensuring that the accumulator can serve as an emergency power source to drive the thrust reverser to complete critical actions in the event of a main oil supply system failure.

[0004] Currently, the above three inspection items are typically completed using decentralized, independent equipment and manual operation. For the thrust reverser activation response time check, a dedicated hydraulic testing system is used to observe whether the opening and closing actions are normal and whether the opening and closing times are up to standard. For the hydraulic actuator sealing check, a manual pump is used to pressurize and observe for leaks. For the accumulator charging check, a high-pressure nitrogen cylinder and dedicated charging and testing tools are required, and the gas replenishment operation and pressure measurement are completed according to strict procedures.

[0005] However, existing technologies have the following shortcomings in practical applications: 1) The three inspection items rely on different equipment and tools. The inspection locations are scattered and the equipment is not centralized, which requires maintenance personnel to frequently move and switch equipment between multiple workstations, resulting in low inspection efficiency. In addition, the connection between the various inspections is not smooth, and there is a lack of unified scheduling and control, which increases the inspection cycle and labor costs.

[0006] 2) The accumulator charging test requires a separate high-pressure nitrogen cylinder and charging tools, which are separate from the hydraulic testing system, further increasing the types of equipment and operational complexity. In addition, since the accumulator requires a nitrogen pressure of 10MPa, while the full pressure of the nitrogen cylinder may be 16MPa, after providing the accumulator with a charging pressure of 10MPa, the remaining gas in the nitrogen cylinder cannot meet the charging requirements, resulting in waste of the remaining gas. Summary of the Invention

[0007] This invention provides an inspection device for aero-engine thrust reversers to solve the technical problems of existing technologies where thrust reverser activation response time inspection, hydraulic actuator sealing inspection, and accumulator charging inspection all require different equipment and tools, resulting in low inspection efficiency, long inspection cycles, and high labor costs. Accumulator charging inspection also increases the variety of equipment and operational complexity, and may waste residual nitrogen in nitrogen cylinders.

[0008] According to one aspect of the present invention, an inspection device for an aircraft engine thrust reverser is provided, comprising: a mounting housing, movably disposed and used to fix a hydraulic actuator cylinder; an oil supply system disposed within the mounting housing, used to supply high-pressure oil at a first preset pressure to the thrust reverser or low-pressure oil at a second preset pressure to the hydraulic actuator cylinder, wherein the first preset pressure is greater than the second preset pressure; an air charging system disposed within the mounting housing, used to connect to an external air source to pressurize and charge an accumulator in the thrust reverser; and a control system disposed on the mounting housing, electrically connected to the oil supply system and the air charging system respectively, used to control the operation of the oil supply system and the air charging system, and electrically connected to the thrust reverser to record the activation response time of the thrust reverser.

[0009] As a further improvement to the above technical solution: Furthermore, the oil supply system includes an oil tank, an oil outlet pipeline connected to the oil tank, a switch valve one installed on the oil outlet pipeline, a main oil supply line connected to the oil outlet pipeline, an oil supply pump installed on the main oil supply line, a first oil delivery branch line connected to the main oil supply line for connecting the oil inlet end of the thrust reverser, a switch valve two installed on the first oil delivery branch line, a first return oil pipeline connected to the oil tank for connecting the return oil end of the thrust reverser, a second oil delivery branch line connected to the main oil supply line for connecting the oil inlet end of the hydraulic actuator, a switch valve three installed on the second oil delivery branch line, a second return oil pipeline connected to the oil tank for connecting the return oil end of the hydraulic actuator, oil pressure regulating valves connected to the oil outlet end of the oil supply pump and the oil tank respectively, and a pressure gauge one installed on the main oil supply line.

[0010] Furthermore, the oil supply system also includes an oil supply branch connected to the oil tank and the first oil supply branch, a pressure gauge 2 installed on the oil supply branch, and a hand-cranked pump and a switch valve 4 arranged sequentially along the oil supply direction on the oil supply branch.

[0011] Furthermore, the oil supply system also includes filter one installed at the oil inlet end of the oil outlet pipeline, and filters two and three installed sequentially at the oil outlet end of the oil supply pump along the oil supply direction, with the filtration accuracy of filters one, two and three increasing sequentially.

[0012] Furthermore, the oil supply system also includes a sampling pipeline connected to the oil outlet end of the oil outlet pipeline, a sampling container connected to the oil outlet end of the sampling pipeline, and a switch valve installed on the sampling pipeline.

[0013] Furthermore, the oil supply system also includes overflow valves connected to the oil outlet of the oil supply pump and the oil tank, respectively.

[0014] Furthermore, the inflation system includes an inflation pipeline, pressure gauge three, a pneumatic booster pump, a switch valve six, pressure gauge four, an air supply pipeline, an air pressure regulating valve, a switch valve seven, an air discharge pipeline, a switch valve eight, a silencer, and pressure gauge five. The inflation pipeline is used to connect the nitrogen cylinder and the accumulator respectively. The boosting end of the pneumatic booster pump is connected to the inflation pipeline. Pressure gauge three, the boosting end of the pneumatic booster pump, switch valve six, and pressure gauge four are arranged sequentially on the inflation pipeline along the inflation direction. The air supply pipeline is connected to the drive end of the pneumatic booster pump and is used to connect to the compressed air source. The air pressure regulating valve and switch valve seven are arranged sequentially on the air supply pipeline along the air supply direction. Switch valve eight and the silencer are arranged sequentially on the air discharge pipeline along the air discharge direction. Pressure gauge five is used to detect the pressure of the accumulator.

[0015] Furthermore, the inflation system also includes filters four and five arranged sequentially on the air inlet end of the inflation pipeline along the inflation direction, and filter six arranged on the air inlet end of the air supply pipeline. The filtration accuracy of filter four is less than that of filter five.

[0016] Furthermore, the first preset pressure is 19.89 MPa to 22.05 MPa, and the second preset pressure is 1.96 MPa to 5.88 MPa.

[0017] Furthermore, the housing includes a housing body, a flip cover rotatably mounted on the housing body, an actuating cylinder clamp mounted inside the housing body, and a quick-connect coupling mounted inside the housing body.

[0018] The present invention has the following beneficial effects: The aircraft engine thrust reverser inspection equipment of the present invention involves moving the mounting housing to the inspection station to fix the hydraulic actuator, and connecting the oil supply system, air charging system, and control system to the corresponding interfaces of the thrust reverser. Under the unified scheduling of the control system, the oil supply system supplies high-pressure oil at a first preset pressure to the thrust reverser, and the control system records the thrust reverser's opening response time to complete the thrust reverser opening response time check. The oil supply system also supplies low-pressure oil at a second preset pressure to the hydraulic actuator to complete the hydraulic actuator's sealing check. Furthermore, the air supply system connects to an external air source to pressurize and charge the accumulator in the thrust reverser to complete the accumulator charging check. The air supply system can operate synchronously with the oil supply system for inspection. High efficiency; In the above inspection process, this solution integrates the oil supply system, air filling system, and control system onto the mounting housing, and uses the control system to schedule and control the oil supply system and air filling system, so that the above three inspection items can be completed at the same workstation without repeatedly disassembling and assembling interface pipelines, avoiding frequent transfer of equipment between different workstations, and ensuring smooth connection between various inspections, which greatly improves inspection efficiency, shortens inspection cycle, and reduces inspection costs; by completing the three inspections with a single device, maintenance personnel only need to issue commands through the control system to complete the three inspections, reducing the types of equipment and reducing operational complexity; and by pressurizing and filling, the residual gas in the external gas source (such as nitrogen cylinder) is fully utilized, which will not cause waste of residual gas.

[0019] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a physical schematic diagram of the inspection equipment for the aero-engine thrust reverser according to a preferred embodiment of the present invention; Figure 2 This is a first-view structural schematic diagram of the inspection equipment for the aero-engine thrust reverser according to a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the aircraft engine thrust reverser inspection device from a second perspective, according to a preferred embodiment of the present invention. Figure 4 This is a third-view structural schematic diagram of the inspection equipment for the aero-engine thrust reverser according to a preferred embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the working principle of the fuel supply system and the air supply system in the inspection equipment for the aero-engine thrust reverser according to a preferred embodiment of the present invention.

[0021] Legend: 100. Housing; 110. Housing body; 120. Flip cover; 130. Actuating cylinder clamp; 140. Quick connector; 200. Oil supply system; 201. Oil tank; 202. Switch valve one; 203. Oil supply pump; 204. Switch valve two; 205. Switch valve three; 206. Oil pressure regulating valve; 207. Pressure gauge one; 208. Pressure gauge two; 209. Hand pump; 210. Switch valve four; 211. Filter one; 212. Filter two; 213. Filter 3; 214. Sampling container; 215. Switch valve five; 216. Overflow valve; 217. Switch valve nine; 300. Inflation system; 301. Pressure gauge three; 302. Pneumatic booster pump; 303. Switch valve six; 304. Pressure gauge four; 305. Air pressure regulating valve; 306. Switch valve seven; 307. Switch valve eight; 308. Silencer; 309. Pressure gauge five; 310. Filter four; 311. Filter five; 312. Filter six; 400. Control system. Detailed Implementation

[0022] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification.

[0023] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not restrictive. For example, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” as used herein may also include the plural forms. When used in this specification, the terms “comprising,” “including,” and / or “containing” mean that the associated integers, steps, operations, elements, and / or components are present, but do not preclude the presence of one or more other features, integers, steps, operations, elements, components, and / or groups, or that other features, integers, steps, operations, elements, components, and / or groups may be added to the system / method.

[0024] like Figures 1-4As shown, the aircraft engine thrust reverser inspection equipment of this embodiment includes: a mounting housing 100, movably arranged and used to fix the hydraulic actuator cylinder; an oil supply system 200, arranged inside the mounting housing 100, used to supply high-pressure oil at a first preset pressure to the thrust reverser or low-pressure oil at a second preset pressure to the hydraulic actuator cylinder, wherein the first preset pressure is greater than the second preset pressure; an air charging system 300, arranged inside the mounting housing 100, used to connect to an external air source to pressurize and charge the accumulator in the thrust reverser; and a control system 400, arranged on the mounting housing 100, electrically connected to the oil supply system 200 and the air charging system 300 respectively, used to control the operation of the oil supply system 200 and the air charging system 300, and electrically connected to the thrust reverser to record the start-up response time of the thrust reverser.

[0025] like Figures 1-4 As shown, specifically, the aircraft engine thrust reverser inspection equipment of this embodiment moves the mounting housing 100 to the inspection station to fix the hydraulic actuator, and connects the oil supply system 200, the air charging system 300, and the control system 400 to the corresponding interfaces of the thrust reverser. Under the unified scheduling of the control system 400, the oil supply system 200 is controlled to provide high-pressure oil at a first preset pressure to the thrust reverser, and the control system 400 records the opening response time of the thrust reverser to complete the thrust reverser opening response time check. The oil supply system 200 is controlled to provide low-pressure oil at a second preset pressure to the hydraulic actuator to complete the hydraulic actuator sealing check, and the air supply system is controlled to connect to an external air source to pressurize and charge the accumulator in the thrust reverser to complete the accumulator charging check. When the oil supply system 200 is working, the air supply system can be synchronized. The system boasts high efficiency in operation and inspection. During the aforementioned inspection process, this solution integrates the oil supply system 200, the air filling system 300, and the control system 400 onto the mounting housing 100. The control system 400 schedules and controls the oil supply system 200 and the air filling system 300, allowing all three inspection items to be completed at the same workstation. This eliminates the need for repeated disassembly and reassembly of interface pipelines, avoiding frequent equipment transfers between different workstations. The seamless connection between various inspections significantly improves inspection efficiency, shortens the inspection cycle, and reduces inspection costs. By completing all three inspections with a single device, maintenance personnel only need to issue commands through the control system 400 to complete the three inspections, reducing the types of equipment and operational complexity. Furthermore, the pressurized air filling fully utilizes the residual gas in external gas sources (such as nitrogen cylinders), preventing waste of residual gas.

[0026] like Figures 1-4As shown, in this embodiment, the mounting housing 100 includes a housing body 110, a flip cover 120 rotatably disposed on the housing body 110, an actuating cylinder clamp 130 disposed within the housing body 110, and a quick-connect connector 140 disposed within the housing body 110. Specifically, after the mounting housing 100 is moved to the inspection station, the flip cover 120 on the housing body 110 is opened, the hydraulic actuating cylinder is fixed by the actuating cylinder clamp 130, and then connected to the corresponding interface of the reverse thrust device through the quick-connect connector 140 to prepare for subsequent inspection. Optionally, multiple casters are arranged circumferentially at intervals at the lower end of the mounting housing 100 to move the mounting housing 100 by means of the casters. Optionally, the mounting housing 100 is arranged in a cubic shape, and a push-pull rod is provided on one side wall to facilitate the application of force to move the mounting housing 100 by means of the push-pull rod.

[0027] like Figures 1-4 As shown, in this embodiment, the control system 400 is located on the front of the housing body 110 for easy operation by maintenance personnel. The oil supply system 200 and the air supply system are located inside the rear of the housing body 110 and can be opened through the flip cover 120 to facilitate the refueling and cleaning of the oil tank 201 and to facilitate the fixing and inspection of the hydraulic actuator.

[0028] like Figure 5As shown, in this embodiment, the oil supply system 200 includes an oil tank 201, an oil outlet pipeline connected to the oil tank 201, a switch valve 202 installed on the oil outlet pipeline, a main oil supply line connected to the oil outlet pipeline, an oil supply pump 203 installed on the main oil supply line, a first oil supply branch line connected to the main oil supply line for connecting the oil inlet end of the thrust reverser, a switch valve 204 installed on the first oil supply branch line, a first return oil pipeline connected to the oil tank 201 for connecting the return oil end of the thrust reverser, a second oil supply branch line connected to the main oil supply line for connecting the oil inlet end of the hydraulic actuator, a switch valve 205 installed on the second oil supply branch line, a second return oil pipeline connected to the oil tank 201 for connecting the return oil end of the hydraulic actuator, an oil pressure regulating valve 206 connected to the oil outlet end of the oil supply pump 203 and the oil tank 201 respectively, and a pressure gauge 207 installed on the main oil supply line. Specifically, when inspecting the thrust reverser, switch valve 1 202 and switch valve 204 are opened, switch valve 3 205 is closed, and oil pump 203 operates. This pump delivers hydraulic oil from tank 201 to the thrust reverser via the outlet pipeline, main supply pipeline, and first branch pipeline. The hydraulic oil in the thrust reverser returns to tank 201 via the first return pipeline. During the oil supply process, the hydraulic oil is adjusted to a first preset high-pressure level using oil pressure regulating valve 206 and pressure gauge 207. This checks whether the opening and closing actions of the thrust reverser are normal. The time elapsed between opening and closing is also recorded during the inspection to verify the timeliness of the opening and closing, thus achieving the desired effect. The opening response time of the push device is checked. When the hydraulic actuator is checked, switch valve 1 202 and switch valve 3 205 are opened, switch valve 2 204 is closed, and oil pump 203 is working so that the hydraulic oil in oil tank 201 is pumped to the hydraulic actuator through the oil outlet line, the main oil supply line and the second oil supply branch line to supply hydraulic oil to the hydraulic actuator. The hydraulic oil in the hydraulic actuator returns to oil tank 201 through the second oil return line. During the oil supply process to the hydraulic actuator, the hydraulic oil is adjusted to the second preset pressure low pressure oil through the oil pressure regulating valve 206 and pressure gauge 1 207. This checks whether the opening and retraction action of the hydraulic actuator is normal and whether the sealing is qualified, thus realizing the sealing check of the hydraulic actuator.

[0029] like Figure 5 As shown, in this embodiment, the first preset pressure is 19.89 MPa to 22.05 MPa, and the second preset pressure is 1.96 MPa to 5.88 MPa. Specifically, by controlling the first preset pressure within the range of 19.89 MPa to 22.05 MPa, a realistic simulation of the working conditions of the thrust reverser is achieved, ensuring the authenticity and reliability of the inspection results; by controlling the second preset pressure within the range of 1.96 MPa to 5.88 MPa, a realistic simulation of the static working conditions of the hydraulic actuator is achieved, ensuring the authenticity and reliability of the inspection results.

[0030] like Figure 5 As shown, in this embodiment, the oil supply system 200 also includes an oil supply branch that is connected to the oil tank 201 and the first oil supply branch, a pressure gauge 208 installed on the oil supply branch, and a hand-cranked pump 209 and a switch valve 210 arranged sequentially along the oil supply direction on the oil supply branch. Specifically, during the process of supplying high-pressure oil to the thrust reverser for inspection, if the high-pressure oil pressure displayed on pressure gauge 207 is found to be insufficient or has dropped, switch valve 210 opens and hand pump 209 operates, so that the hydraulic oil in tank 201 is pumped to the first delivery branch via the oil supply branch for manual compensation. When oil supply pump 203 fails and a sealing check of the hydraulic actuator is required, switch valves 204, 205, and 210 open, switch valve 202 closes, and hand pump 209 operates, so that the hydraulic oil in tank 201 is pumped to the hydraulic actuator via the oil supply branch, the first delivery branch, the main oil supply line, and the second delivery branch. Pressure gauge 208 is used to check whether the hydraulic oil pressure is at the second preset pressure, thus achieving a sealing check of the hydraulic actuator.

[0031] like Figure 5 As shown, in this embodiment, the oil supply system 200 also includes a filter 211 installed at the oil inlet end of the oil outlet pipeline, and filters 212 and 213 installed sequentially at the oil outlet end of the oil supply pump 203 along the oil supply direction. The filtration accuracy of filters 211, 212 and 213 increases sequentially. Specifically, filter 211 intercepts large particles of impurities that may enter the oil tank 201 from entering the oil outlet pipeline and flowing into the oil supply pump 203, ensuring the smooth operation of the oil supply pump 203. The oil supply pump 203 itself also generates wear particles during operation, and the hydraulic oil's scouring of the oil supply pump 203 will generate debris. Filter 212 filters out these impurity particles generated by the oil supply pump 203 itself, as well as particles that may have been missed by filter 211, to effectively protect filter 313. Filter 313 filters out tiny particles to effectively protect the precision components in the hydraulic actuator and thrust reverser. Through staged filtration, the reliable operation of the oil supply system 200 is ensured.

[0032] Optionally, filter 212 has an accuracy of 20 μm, and filter 3213 has an accuracy of 5 μm.

[0033] like Figure 5As shown, in this embodiment, the oil supply system 200 also includes a sampling pipeline connected to the oil outlet end of the oil outlet pipeline, a sampling container 214 connected to the oil outlet end of the sampling pipeline, and a switch valve 215 installed on the sampling pipeline. Specifically, when it is necessary to sample and test the oil, the switch valve 202 and the switch valve 215 are opened, and the hydraulic oil in the oil tank 201 flows into the sampling container 214 through the oil outlet pipeline and the sampling pipeline.

[0034] like Figure 5 As shown, in this embodiment, the oil supply system 200 also includes an overflow valve 216 connected to the oil outlet of the oil supply pump 203 and the oil tank 201. Specifically, the overflow valve 216 ensures that after the pressure regulating valve sets the pressure, the internal pipeline of the oil supply system 200 does not experience overpressure, ensuring stable and safe oil supply. Optionally, the overpressure threshold of the overflow valve 216 is 23 MPa.

[0035] like Figure 5 As shown, in this embodiment, the oil supply system 200 also includes an oil drain pipe connected to the oil tank 201 and a switch valve 217 installed on the oil drain pipe. After the inspection is completed, the switch valve 217 is opened to drain the oil in the oil tank 201 so as to clean the oil tank 201.

[0036] like Figure 5As shown, in this embodiment, the inflation system 300 includes an inflation pipeline, pressure gauge 301, pneumatic booster pump 302, switch valve 6 303, pressure gauge 4 304, air supply pipeline, air pressure regulating valve 305, switch valve 7 306, air discharge pipeline, switch valve 8 307, silencer 308, and pressure gauge 5 309. The inflation pipeline is used to connect the nitrogen cylinder and the accumulator respectively. The booster end of the pneumatic booster pump 302 is connected to the inflation pipeline. Pressure gauge 301, air supply pipeline, air pressure regulating valve 305, switch valve 7 306, air discharge pipeline, switch valve 8 307, silencer 308, and pressure gauge 5 309. The booster pump 302's boosting end, switch valve six 303, and pressure gauge four 304 are arranged sequentially along the inflation direction on the inflation pipeline. The air supply pipeline is connected to the drive end of the pneumatic booster pump 302 and is used to connect to the compressed air source. The air pressure regulating valve 305 and switch valve seven 306 are arranged sequentially along the air supply direction on the air supply pipeline. The switch valve eight 307 and silencer 308 are arranged sequentially along the air discharge direction on the air discharge pipeline. Pressure gauge five 309 is used to detect the accumulator pressure. Specifically, when the accumulator in the thrust reverser is checked for inflation, switch valve six 303 is opened, and nitrogen from the nitrogen cylinder is injected into the accumulator through the inflation pipeline and the gas supply pipeline. During inflation, switch valve seven 306 is opened, and compressed air is delivered to the drive end of the pneumatic booster pump 302 through the gas supply pipeline. During the gas supply process, the pressure of the compressed air is adjusted by the air pressure regulating valve 305. The pneumatic booster pump 302 works under the action of compressed air to boost the nitrogen flowing into the booster end, ensuring that the nitrogen inflation pressure is not lower than the preset value, maximizing the use of the gas in the nitrogen cylinder, avoiding waste of residual gas and extending the gas cylinder replacement cycle. During inflation, pressure gauges three 301 and four 304 are used to check whether the pressure meets the requirements, and pressure gauge five 309 is used to check the accumulator pressure to determine whether it is qualified. After inflation is completed, switch valve eight 307 is opened to cooperate with the silencer 308 to release and silence the gas in the inflation pipeline.

[0037] It should be understood that the compressed air source is usually an in-plant air source, and its pressure is usually 0.8 MPa. In this embodiment, the compressed air pressure is reduced to 0.4 MPa to 0.6 MPa by the air pressure regulating valve 305 to meet the working requirements of the pneumatic booster pump 302.

[0038] like Figure 5As shown, in this embodiment, the inflation system 300 further includes filters 310 and 311 arranged sequentially at the air inlet end of the inflation pipeline along the inflation direction, and filter 312 arranged at the air inlet end of the air supply pipeline. The filtration accuracy of filter 310 is lower than that of filter 311. Specifically, filter 310 prevents large particulate impurities mixed in with the nitrogen tank from entering the pneumatic booster pump 302 through the inflation pipeline; filter 311 prevents particulate impurities generated by the wear of the pneumatic booster pump 302 from entering the accumulator; and filter 312 prevents particulate impurities mixed in with the compressed air from entering the pneumatic booster pump 302 through the air supply pipeline. This staged filtration ensures the reliable operation of the inflation system 300.

[0039] Optionally, filter four 310 has an accuracy of 20 μm, and filter five 311 has an accuracy of 3 μm.

[0040] In this embodiment, the control system 400 includes a controller, a control panel, a reverse push handle indicator light, a reverse push position indicator light, a switch indicator light, and a digital stopwatch. When the operating cam on the reverse push device is moved to the reverse push position, the reverse handle indicator light illuminates first, and then the reverse push position indicator light illuminates when the reverse push door reaches the reverse push position. When the operating cam on the reverse push device is moved to the forward push position, the reverse handle indicator light and the reverse push position indicator light go out, and the switch indicator light illuminates. The digital stopwatch measures and records the movement time of the reverse push door from the forward push position to the reverse push position. Optionally, a time measured by the digital stopwatch between 1.40s and 1.80s is considered acceptable.

[0041] Optionally, the controller is a PLC controller.

[0042] In summary, after reading the detailed disclosure of this specification, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that this specification requires various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this specification and are within the spirit and scope of the exemplary embodiments described herein.

Claims

1. An inspection device for an aircraft engine thrust reverser, characterized in that, include: Mounting housing (100), movably arranged and used to fix the hydraulic actuator cylinder; The oil supply system (200) is installed in the mounting housing (100) and is used to provide high-pressure oil at a first preset pressure to the thrust reverser or low-pressure oil at a second preset pressure to the hydraulic actuator, wherein the first preset pressure is greater than the second preset pressure. An inflation system (300) is installed inside the mounting housing (100) and is used to connect to an external air source to pressurize and inflate the accumulator in the thrust reverser. The control system (400) is installed on the mounting housing (100) and is electrically connected to the oil supply system (200) and the air supply system (300) respectively. It is used to control the operation of the oil supply system (200) and the air supply system (300) and is electrically connected to the thrust reverser to record the start-up response time of the thrust reverser.

2. The aircraft engine thrust reverser inspection equipment according to claim 1, characterized in that, The fuel supply system (200) includes a fuel tank (201), an oil outlet pipeline connected to the fuel tank (201), a switch valve one (202) installed on the oil outlet pipeline, a main fuel supply line connected to the oil outlet pipeline, a fuel supply pump (203) installed on the main fuel supply line, a first fuel delivery branch line connected to the main fuel supply line for connecting the inlet end of the thrust reverser, a switch valve two (204) installed on the first fuel delivery branch line, and a fuel tank (201) connected to the thrust reverser for connecting the fuel tank (201). The system includes a first return oil pipeline at the return oil end, a second oil supply branch connected to the main oil supply line for connecting the oil inlet end of the hydraulic actuator, a switch valve three (205) installed on the second oil supply branch, a second return oil pipeline connected to the oil tank (201) for connecting the return oil end of the hydraulic actuator, an oil pressure regulating valve (206) connected to the oil outlet end of the oil supply pump (203) and the oil tank (201) respectively, and a pressure gauge one (207) installed on the main oil supply line.

3. The aircraft engine thrust reverser inspection equipment according to claim 2, characterized in that, The oil supply system (200) also includes an oil supply branch connected to the oil tank (201) and the first oil supply branch, a pressure gauge two (208) installed on the oil supply branch, and a hand-cranked pump (209) and a switch valve four (210) arranged sequentially along the oil supply direction on the oil supply branch.

4. The aircraft engine thrust reverser inspection equipment according to claim 2, characterized in that, The oil supply system (200) also includes a filter one (211) installed at the oil inlet end of the oil outlet pipeline, and a filter two (212) and a filter three (213) installed sequentially at the oil outlet end of the oil supply pump (203) along the oil supply direction, with the filtration accuracy of the filter one (211), filter two (212) and filter three (213) increasing sequentially.

5. The aircraft engine thrust reverser inspection equipment according to claim 2, characterized in that, The oil supply system (200) also includes a sampling pipeline connected to the oil outlet end of the oil outlet pipeline, a sampling container (214) connected to the oil outlet end of the sampling pipeline, and a switch valve (215) installed on the sampling pipeline.

6. The aircraft engine thrust reverser inspection equipment according to claim 2, characterized in that, The oil supply system (200) also includes an overflow valve (216) that is connected to the oil outlet of the oil supply pump (203) and the oil tank (201).

7. The aircraft engine thrust reverser inspection equipment according to any one of claims 1-6, characterized in that, The inflation system (300) includes an inflation pipeline, pressure gauge three (301), a pneumatic booster pump (302), a switch valve six (303), a pressure gauge four (304), an air supply pipeline, an air pressure regulating valve (305), a switch valve seven (306), an air discharge pipeline, a switch valve eight (307), a silencer (308), and a pressure gauge five (309). The inflation pipeline is used to connect the nitrogen cylinder and the accumulator respectively. The booster end of the pneumatic booster pump (302) is connected to the inflation pipeline. Pressure gauge three (301), the pneumatic booster pump (302), the air supply pipeline, the air pressure regulating valve (305), the air pressure regulating valve seven (306), the air discharge pipeline, the air pressure regulating valve eight (307), the silencer (308), and the pressure gauge five (309). The booster pump (302), the switch valve six (303), and the pressure gauge four (304) are arranged sequentially on the inflation pipeline along the inflation direction. The air supply pipeline is connected to the drive end of the pneumatic booster pump (302) and is used to connect to the compressed air source. The air pressure regulating valve (305) and the switch valve seven (306) are arranged sequentially on the air supply pipeline along the air supply direction. The switch valve eight (307) and the silencer (308) are arranged sequentially on the air discharge pipeline along the air discharge direction. The pressure gauge five (309) is used to detect the accumulator pressure.

8. The aircraft engine thrust reverser inspection equipment according to claim 6, characterized in that, The inflation system (300) also includes filters four (310) and five (311) arranged sequentially on the air inlet end of the inflation pipeline along the inflation direction, and filters six (312) arranged on the air inlet end of the air supply pipeline. The filtration accuracy of filters four (310) is less than that of filters five (311).

9. The aircraft engine thrust reverser inspection equipment according to any one of claims 1-6, characterized in that, The first preset pressure is 19.89 MPa to 22.05 MPa, and the second preset pressure is 1.96 MPa to 5.88 MPa.

10. The aircraft engine thrust reverser inspection equipment according to any one of claims 1-6, characterized in that, The mounting housing (100) includes a housing body (110), a flip cover (120) rotatably disposed on the housing body (110), an actuating cylinder clamp (130) disposed within the housing body (110), and a quick connector (140) disposed within the housing body (110).

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