Hydraulic Lock Loading Test Device

Abstract

The present invention discloses a hydraulic lock loading test device, which has adjustable loading force, controllable loading speed and loading force. The present invention is implemented through the following technical scheme: the loading cylinder connecting plate is connected to the hydraulic loading cylinder through the loading cylinder connecting hole on the arched connecting plate, and is connected to the spring seat plate through the circumferential loading connecting rod, and the transmission connecting rod pre-installed with the spring guide sleeve, the opposite end spring guide sleeve and the loading spring passes through the central hole of the spring seat plate, and the spring guide sleeves and the opposite end spring guide sleeves at both ends of the loading spring are tightened by the limit nut and the adjusting nut to form a spring reversing mechanism, and the loading spring assembled on the transmission connecting rod 1 is axially guided to form a rapid reversing loading mechanism simulating the movement of the cabin door, and the rapid reversing loading mechanism divides the loading process into two parts: simulating the detection of normal locking and unlocking with load, detecting the displacement and loading force index of the movement process, and effectively assessing the tested hydraulic lock.

Description

Technical Field

[0001] The present invention relates to a hydraulic lock loading test mechanism that can achieve instantaneous commutation during the movement test of a hydraulic lock when performing a loading test during the movement test of the hydraulic lock. Background Art

[0002] A hydraulic lock is a hydraulic actuator that converts hydraulic energy into mechanical energy. In an aircraft hydraulic system, after the aircraft cabin door is closed, it is locked, and before the cabin door is opened, the hydraulic lock release mechanism is activated to achieve the normal closing and release of the cabin door. During the flight of the aircraft, after other actuators drive the cabin door to move to the closed state, a stable hydraulic lock mechanism is required to lock and hold it to ensure the state of the cabin door during flight. After receiving the command signal to open the cabin door, the hydraulic lock can be released in time through the hydraulic system to ensure the normal opening of the cabin door. The performance and stability of the hydraulic lock are crucial for the reliability and even flight safety during the flight process.

[0003] The movement process of the hydraulic lock is mainly divided into the locking process and the unlocking process. Among them, in the locking process, the lock ring of the cabin door touches the lock hook of the hydraulic lock, driving the lock hook to rotate a certain angle and cross a designed unlocking movement critical point position, and then the lock hook automatically drives the cabin door to the locking position and locks it to hold. In the unlocking process, after the hydraulic pressure is reversed, the hydraulic lock drives the cabin door load to be released, and there are problems of mutual control and mutual influence among various control actions. During the assembly and debugging stage, since the components of the hydraulic lock with the cabin door load and the hydraulic lock control system cannot be installed on the cabin door to simulate the actual working conditions for testing, the quality of the hydraulic lock cannot be inspected and guaranteed, and the probability of repair reaches 40%. The existing power source has large pressure and flow rate. The pressure of the hydraulic lock system fluctuates with the resistance of the loading test. The working conditions are complex, the pressure of the loading system is abnormal, and after the fluid medium is repeatedly recycled, indicators such as viscosity and pH value will deteriorate. If there is a liquid leakage phenomenon during the test, the pressure of the hydraulic lock system will be insufficient, which is very different from the actual working conditions. Traditional hydraulic loading equipment uses multiple sets of throttle nozzles to switch to control the flow rate. During the debugging stage, it is necessary to obtain the flow characteristics of different-diameter throttle nozzles under the working pressure through experiments. The adjustable range of the loading flow rate of the testing technology is small, it takes a lot of time, and the workload of manual test preparation is large. It cannot effectively detect the actual performance and comprehensive characteristics of the components of the hydraulic lock system with the cabin door load after overhaul, affecting the final use safety of the hydraulic lock control system. By dynamically detecting the positive pressure, continuous dynamic measurement of the friction coefficient can be achieved, which can improve the test accuracy and evaluate the stability of the locking and unlocking processes of the hydraulic lock, and is crucial for improving the performance of the hydraulic lock and optimizing the structural design. Summary of the Invention

[0004] The object of the present invention is to address the deficiencies existing in the prior art. It aims to simulate the process of the hatch door touching the hydraulic lock hook through a mechanical structure, detect the influence of various load indicators on the performance of the hydraulic lock, and optimize the structural design. A hydraulic lock loading test mechanism with a simple structure, easy installation and debugging, adjustable loading force, and controllable loading speed and force is provided. By means of a simple mechanical structure, various working conditions of the hatch door are simulated, and the simulation of the hatch door load and the instantaneous commutation for reverse linear loading are realized through the loading cylinder and the spring mechanism.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a hydraulic lock loading test device, comprising: a transmission connecting rod 1 coupled to the hydraulic lock 12 to be measured at one end, and a loading cylinder connecting plate 8 connected to the hydraulic loading cylinder. It is characterized in that: the loading cylinder connecting plate 8 adopts an arcuate connecting plate, communicates with the hydraulic loading cylinder through the loading cylinder connection holes on the arcuate connecting plate, and is connected to the spring seat plate 4 through the circumferential loading connecting rod 5. The loading connecting rod 5 is fixedly assembled through the back-tightening nut 3. The transmission connecting rod 1 pre-installed with the spring guide sleeve 11, the opposite-end spring guide sleeve 7 and the loading spring 6 passes through the central hole of the spring seat plate 4. After the spring guide sleeve 11 and the opposite-end spring guide sleeve 7 at both ends of the loading spring 6 are tightened by the limit nut 2 and the adjusting nut 10 to form a spring commutation mechanism, the loading spring 6 assembled on the transmission connecting rod 1 is axially guided to form a rapid commutation loading mechanism for simulating the movement of the hatch door. The rapid commutation loading mechanism divides the loading process into two parts: simulating and detecting normal locking and unlocking with load, detects the displacement and loading force indicators during the movement process, and effectively assesses the hydraulic lock 12 to be measured.

[0006] The present invention has the following beneficial effects compared with the prior art:

[0007] Easy installation and debugging. According to the actual situation, the present invention axially guides the loading spring 6 assembled on the transmission connecting rod 1 after the spring guide sleeve 11 and the opposite-end spring guide sleeve 7 at both ends of the loading spring 6 are tightened by the limit nut 2 and the adjusting nut 10 to form a rapid commutation loading mechanism for simulating the movement of the hatch door. Through the mechanical structure, the fixed frame combination of the loading connecting rod, the spring seat plate, and the loading cylinder connecting plate and a series of limiting mechanisms are combined to form a rapid commutation loading mechanism that can simulate the movement of the hatch door. The structure is simple, the installation and debugging are convenient, and the volume is much smaller than the actual volume of the hatch door. Through the loading cylinder connecting plate 8 connected to the hydraulic loading cylinder, a system for comprehensively loading and testing the hydraulic lock 12 to be measured is formed. By the pre-pressure of the loading spring, the actual working conditions of the hydraulic lock 12 to be measured are simulated, and the components of the hydraulic lock 12 to be measured are comprehensively loaded and tested, realizing the loading and testing of the hydraulic lock 12 to be measured, improving the qualification rate of the components of the hydraulic lock 12 to be measured, and effectively reducing the repair rate.

[0008] The general performance is good. The quick-reversing loading mechanism of the present invention divides the loading process into two parts: simulating the detection of normal locking and unlocking under load, detecting the displacement and loading force index during the movement process, and effectively evaluating the tested hydraulic lock 12. It can meet the loading force requirements of different tested hydraulic locks 12 and is compatible with the loading tests of different hydraulic locks. Since the loading process applies the tensile load through the pre-compression amount of the loading spring 6, the tightening and loosening adjustment can be carried out through the adjusting nut 10 connected to the right end of the loading spring 6, so as to increase and decrease the pre-pressure of the spring and realize the loading test of different products.

[0009] The structure is flexible and ingenious. In view of the special structural characteristics of the aviation hydraulic lock, the present invention uses a spring reversing mechanism for loading. After the locking movement stroke exceeds the mechanical structure critical point, a rapid active locking movement will occur, and the loading performance is excellent. Even the relatively advanced servo control mechanism cannot achieve the rapid reversing response speed. This simple-structured quick-reversing loading mechanism has a faster reversing response speed than the servo control mechanism and meets the loading requirements of the tested hydraulic lock 12 test. Brief Description of the Drawings

[0010] Figure 1 It is a semi-sectional schematic diagram of the hydraulic lock loading test device of the present invention;

[0011] Figure 2 It is a schematic diagram of the loading test principle of the hydraulic lock loading test device of the invention.

[0012] In the figure: 1 transmission connecting rod, 2 limit nut, 3 back-tightening nut, 4 spring seat plate, 5 loading connecting rod, 6 loading spring, 7 opposed-end spring guide sleeve, 8 loading cylinder connecting plate, 9 loading cylinder connection hole, 10 adjusting nut, 11 spring guide sleeve, 12 tested hydraulic lock, 13 hydraulic lock loading test device, 14 hydraulic loading cylinder. Detailed Embodiment

[0013] Refer to Figure 1 、 Figure 2。In the preferred example described below, a hydraulic lock loading test device includes: a transmission connecting rod 1 coupled to the hydraulic lock 12 to be tested at one end, and a loading cylinder connecting plate 8 connected to the hydraulic loading cylinder. Among them: the loading cylinder connecting plate 8 adopts an arcuate connecting plate, and the hydraulic loading cylinder is connected through the loading cylinder connection hole on the arcuate connecting plate. The loading cylinder connecting plate 8 is connected to the spring seat plate 4 through the circumferential loading connecting rod 5. The loading connecting rod 5 is fixedly assembled through the back-tightening nut 3. The transmission connecting rod 1 pre-installed with the spring guide sleeve 11, the opposite-end spring guide sleeve 7 and the loading spring 6 passes through the central hole of the spring seat plate 4. After the spring guide sleeve 11 and the opposite-end spring guide sleeve 7 at both ends of the loading spring 6 are tightened by the limit nut 2 and the adjusting nut 10 to form a spring commutation mechanism, the loading spring 6 assembled on the transmission connecting rod 1 is axially guided to form a quick commutation loading mechanism simulating the movement of the hatch. The quick commutation loading mechanism divides the loading process into two parts: simulating the detection of normal locking and unlocking with load, detecting the displacement and loading force index during the movement process, and effectively assessing the hydraulic lock 12 to be tested.

[0014] The spring guide sleeve 11 and the opposite-end spring guide sleeve 7 are installed on the transmission connecting rod 1 to guide both ends of the loading spring 6, ensuring that the movement direction of the transmission connecting rod 1 and the loading force are axial. One end of the transmission connecting rod 1 is coupled to the hydraulic lock 12 to be tested, and the loading cylinder connection hole 9 on the loading cylinder connecting plate 8 is used to connect the loading cylinder.

[0015] The loading process is divided into two parts. The first part simulates the detection of normal locking. The hydraulic pressure generated by the loading cylinder connected to the loading cylinder connection hole 9 pushes Figure 1 the spring commutation mechanism shown moves to the left. Under the limiting action of the limit nut 2, the loading force of the entire spring commutation mechanism is rigidly conducted through the loading connecting rod 5 to push the transmission connecting rod 1 and the limit nut 2 to generate movement. And after the loading spring 6 is installed, there is an initial pre-pressure. The size of the linear loading force is adjusted by adjusting the spring pre-pressure through the adjusting nut 10 to realize the passive movement of the hydraulic lock 12 to be tested. The second part of the loading process is to simulate the detection of unlocking with load. In the state where the lock is maintained during the simulation of the real flight condition, when the hydraulic lock 12 to be tested is hydraulically commutated, the loading spring 6 is compressed, and the lock hook bears the tensile load compressed by the loading spring 6. When the transmission connecting rod 1 moves past the mechanical dead point of the hydraulic lock 12 to be tested, the lock hook of the hydraulic lock 12 to be tested quickly changes from passive movement to active movement, the lock hook is released, and the locking movement is accelerated in the same direction. The displacement and loading force index of the simulation detection movement process of the hydraulic lock are completed.

[0016] Refer to Figure 2。In the loading test, the locking hook of the hydraulic lock 12 under test is movably connected to the transmission connecting rod 1 of the hydraulic lock loading test device 13, and the other end is connected to the hydraulic loading cylinder 14 through the hydraulic loading cylinder connection hole 9. The extension, retraction, and commutation of the hydraulic loading cylinder 14 are realized through the oil supply interfaces of the rodless chamber B and the rod chamber A. During the locking process of the hydraulic lock 12 under test, the rodless chamber B is supplied with oil, the piston rod extends, and the frame of the hydraulic lock loading test device 13 is pushed to move leftward. When the locking hook of the hydraulic lock 12 under test is pushed past the dead point, the locking hook continues to move leftward, and the movement mode becomes an active movement. The spring is stretched to the maximum distance. At this time, the movement speed of the locking hook is greater than the extension speed of the piston rod of the hydraulic loading cylinder 14 and the leftward movement speed of the frame of the hydraulic lock loading test device 13, compressing the loading spring 6 to achieve reverse loading.

[0017] Without creative efforts, the present invention can also obtain other technical solutions according to the above embodiments, and equivalent changes made within the protection scope of the present invention should all fall within the protection scope of the present invention, and all belong to the protection scope of the present invention.

Claims

1. A hydraulic lock loading test device, comprising: a transmission connecting rod (1) coupled to the hydraulic lock (12) to be measured at one end, and a loading cylinder connecting plate (8) connecting the hydraulic loading cylinder, characterized in that: the loading cylinder connecting plate (8) is a bow-shaped connecting plate, the hydraulic loading cylinder is communicated through the loading cylinder connection hole on the bow-shaped connecting plate, and the spring seat plate (4) is connected through the circumferential loading connecting rod (5). The loading connecting rod (5) is fixedly assembled through the back-tightening nut (3). The transmission connecting rod (1) pre-installed with the spring guide sleeve (11), the opposite-end spring guide sleeve (7) and the loading spring (6) passes through the central hole of the spring seat plate (4). After the spring guide sleeve (11) and the opposite-end spring guide sleeve (7) at both ends of the loading spring (6) are tightened by the limit nut (2) and the adjusting nut (10) to form a spring commutation mechanism, the loading spring (6) assembled on the transmission connecting rod (1) is axially guided to form a rapid commutation loading mechanism for simulating the movement of the hatch. The rapid commutation loading mechanism divides the loading process into two parts: simulating the normal locking during detection and unlocking with load, detecting the displacement and loading force index during the movement process, and effectively assessing the hydraulic lock (12) to be measured; The loading process is divided into two parts. The first part simulates the normal locking during detection. The hydraulic pressure generated by the hydraulic loading cylinder connected to the loading cylinder connection hole (9) pushes the spring commutation mechanism to move to the left. Under the restriction of the limit nut (2), the loading force of the entire spring commutation mechanism is rigidly conducted through the loading connecting rod (5) to push the transmission connecting rod (1) and the limit nut (2) to generate movement. And after the loading spring (6) is installed, there is an initial pre-pressure. The linear loading force is adjusted by adjusting the spring pre-pressure through the adjusting nut (10) to realize the passive movement of the hydraulic lock (12) to be measured; The second part of the loading process is to simulate the detection of unlocking with load. In the state where the lock is maintained during the simulated real flight condition, when the hydraulic lock (12) to be measured is hydraulically reversed, the loading spring (6) is compressed, and the lock hook bears the tensile load of the compression of the loading spring (6). When the transmission connecting rod (1) moves past the mechanical dead point of the hydraulic lock (12) to be measured, the lock hook of the hydraulic lock (12) to be measured quickly changes from passive movement to active movement, the lock hook is released, and the locking movement is accelerated in the same direction to complete the displacement and loading force index of the simulated detection movement process of the hydraulic lock; During the locking process of the hydraulic lock (12) to be measured, the oil is supplied to the B end of the rodless cavity, the piston rod extends, and the frame of the hydraulic lock loading test device (13) is pushed to move to the left. When the lock hook of the hydraulic lock (12) to be measured is pushed past the dead point, the lock hook continues to move to the left, and the movement mode becomes active movement. The spring is stretched to the longest distance. At this time, the movement speed of the lock hook is greater than the extension speed of the piston rod of the hydraulic loading cylinder (14) and the movement speed of the frame of the hydraulic lock loading test device (13) moving to the left, compressing the loading spring (6) to realize reverse loading.

2. The hydraulic lock loading test device according to claim 1, characterized in that: The spring guide sleeve (11) and the opposite-end spring guide sleeve (7) are installed on the transmission connecting rod (1) to guide both ends of the loading spring (6), ensuring that the movement of the transmission connecting rod (1) and the direction of the loading force are axial.

3. The hydraulic lock loading test device according to claim 1, characterized in that: One end of the transmission connecting rod (1) is coupled to the hydraulic lock (12) to be measured, and the loading cylinder connection hole (9) on the loading cylinder connection plate (8) is used to connect the hydraulic loading cylinder.

4. The hydraulic lock loading test device according to claim 1, characterized in that: In the loading test, one end of the locking hook of the hydraulic lock (12) to be measured is movably connected to the transmission connecting rod (1) of the hydraulic lock loading test device (13), and the other end of the hydraulic lock loading test device (13) is connected to the hydraulic loading cylinder (14) through the loading cylinder connection hole (9). The extension, retraction, and commutation of the hydraulic loading cylinder (14) are realized through the oil supply interfaces of the rod chamber A and the rodless chamber B.

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