Aircraft rotary joint endurance test bench

Abstract

The application relates to a kind of aircraft rotary joint endurance test benches, and belongs to the test device of testing rotary joint endurance performance.A kind of aircraft rotary joint endurance test bench, the test bench includes rack main body, power mechanism, rotary limiting mechanism and signal feedback mechanism;The fixed end of rotary joint is installed on rack main body, and rotary end is connected with rotary limiting mechanism;Power mechanism is arranged on rack main body, and is used to provide power for the rotation of rotary limiting mechanism;Rotary limiting mechanism cooperates with signal feedback mechanism to limit its rotation angle;When rotary limiting mechanism rotates to set angle, signal feedback mechanism feeds back signal to PLC, and then PLC controls power mechanism to stop and reverse.This application has the following advantages: 1, can test aircraft rotary joint endurance performance;2, different rotary joints can be installed for testing;3, limiting mechanism prevents rotation overrun through proximity switch, and can be freely adjusted;4, easy to move, can be applied to different places.

Description

Technical Field

[0001] This invention relates to an aircraft rotary joint durability testing bench, which belongs to the category of testing devices for testing the durability performance of rotary joints. Background Technology

[0002] Rotary joints are pipe connection devices where the connected pipes can rotate relative to each other. Their durability directly determines the safety and stability of the entire hydraulic system. Current durability testing presents challenges: how to prevent rotary joint overtravel during testing and issues with automatic control. Aircraft rotary joints, in particular, directly impact the safety and stability of the hydraulic system and even the entire aircraft system; therefore, aircraft rotary joints must undergo rotational durability testing before installation. Summary of the Invention

[0003] The purpose of this invention is to provide an aircraft rotary joint durability test bench that can effectively prevent rotary joint overtravel, for testing the durability performance of rotary joints.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an aircraft rotary joint durability test bench, the test bench comprising a main frame, a power mechanism, a rotation limiting mechanism, and a signal feedback mechanism; the fixed end of the rotary joint is mounted on the main frame, and the rotating end is connected to the rotation limiting mechanism; the power mechanism is disposed on the main frame and is used to provide power for the rotation of the rotation limiting mechanism; the rotation limiting mechanism, in conjunction with the signal feedback mechanism, limits its rotation angle; when the rotation limiting mechanism rotates to a set angle, the signal feedback mechanism feeds a signal to the PLC, and the PLC then controls the power mechanism to stop and reverse.

[0005] Preferably, the power mechanism includes a drive motor and a gearbox, with the drive motor and gearbox connected by bolts.

[0006] Preferably, the rotary limiting mechanism includes a drive disc and a limiting baffle, the drive disc and the limiting baffle are fixed together by bolts; the drive disc is connected to the gearbox by a flat key and fixed to the main body of the frame by a drive mounting bracket; the rotating end of the rotary joint is connected to the drive disc.

[0007] Preferably, the limiting baffle remains vertical in the initial state.

[0008] Preferably, the signal feedback mechanism is a proximity switch, which is mounted on the main body of the platform via a proximity switch bracket. When the rotation limit mechanism approaches, the proximity switch is activated, sending a signal to the PLC, which then controls the power mechanism to stop and reverse.

[0009] Preferably, the height of the proximity switch bracket is adjustable, and its installation position relative to the main body of the stand is also adjustable.

[0010] Preferably, the fixed end of the rotary joint is mounted on the rotary joint bracket, and the rotary joint bracket is fixed to the main body of the platform.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. Can test the durability of aircraft rotary joints;

[0013] 2. By replacing different rotary joint brackets, different rotary joints can be installed for testing;

[0014] 3. The limit mechanism prevents rotation from exceeding the limit through a proximity switch and is freely adjustable;

[0015] 4. Easy to move and suitable for different locations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 A to the left view;

[0018] Figure 3 This is a PLC control flowchart in an embodiment of the present invention;

[0019] Figure 1-2 In the middle, 1. Main frame; 2. Drive motor; 3. Gearbox; 4. Drive mounting bracket; 5. Drive disc; 6. Limit baffle; 7. Proximity switch; 8. Proximity switch bracket; 9. Rotary joint bracket; 10. Rotary joint. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-3 The present invention is further described in detail as follows: A durability test bench for an aircraft rotary joint, the test bench comprising a main body 1, a power mechanism, a rotation limiting mechanism, and a signal feedback mechanism; the fixed end of the rotary joint 10 is mounted on the main body 1, and the rotating end is connected to the rotation limiting mechanism; the power mechanism is disposed on the main body 1 and is used to provide power for the rotation of the rotation limiting mechanism; the rotation limiting mechanism, in conjunction with the signal feedback mechanism, limits its rotation angle; when the rotation limiting mechanism rotates to a set angle, the signal feedback mechanism feeds a signal to the PLC, and the PLC then controls the power mechanism to stop and reverse.

[0021] The specific structure is as follows:

[0022] The power mechanism includes a drive motor 2 and a gearbox 3, with the drive motor 2 and the gearbox 3 connected together by bolts;

[0023] The rotary limiting mechanism includes a drive disc 5, a limiting baffle 6, and a drive mounting bracket 4. The drive disc 5 and the limiting baffle 6 are fixed together by bolts. The drive disc 5 is connected to the reduction gearbox 3 by a key (integrated with the reduction gearbox) and fixed to the main body 1 of the frame by the drive mounting bracket 4. The limiting baffle remains vertical in the initial state.

[0024] The fixed end of the rotary joint 10 is mounted on the rotary joint bracket 9, which is fixed on the main body of the platform 1. Its rotating end is connected to the drive disk 5 and rotates with the drive disk 5.

[0025] The signal feedback mechanism includes a proximity switch 7 and a proximity switch bracket 8. The proximity switch 7 is mounted on the main body 1 of the test bench via the proximity switch bracket 8. There are two of them, which are set on both sides of the drive disc 5. When the limit baffle 6 approaches, the proximity switch 7 will be turned on, and vice versa. When the limit baffle 6 rotates with the drive disc 5 to a set angle, it will trigger the proximity switch 7 to turn on. The proximity switch 7 sends a signal to the PLC. After receiving the signal, the PLC controls the drive motor 2 to stop and then reverse, thereby realizing the cyclic test.

[0026] As a preferred embodiment of this invention, the height of the proximity switch bracket 8 is adjustable, and its installation position relative to the main body 1 is also adjustable. By adjusting the proximity switch bracket 8, the rotation angle θ can be changed, and the proximity switch 7 can be prevented from being impacted by the limiting baffle 6.

[0027] The durability performance test logic is implemented through PLC control, such as... Figure 3 As shown,

[0028] During the durability test, drive motor 2 drives drive disc 5 to rotate via reduction gearbox 3. When it rotates to one side, positioning baffle 6 approaches proximity switch 7, which activates and sends a signal to PLC. PLC then controls drive motor 2 to stop running for a short period (which can be set manually, for example...). Figure 3 After 3 seconds, the PLC controls the drive motor 2 to rotate to the other side, repeating the above steps while counting. This cycle is repeated until the test is completed or the rotary joint fails.

Claims

1. A durability testing bench for aircraft rotary joints, characterized in that: The test bench includes a main frame, a power mechanism, a rotation limiting mechanism, and a signal feedback mechanism. The fixed end of the rotary joint is mounted on a rotary joint bracket, which is fixed to the main frame. The rotating end is connected to the rotation limiting mechanism. The power mechanism is located on the main frame and provides power for the rotation of the rotation limiting mechanism. The rotation limiting mechanism, in conjunction with the signal feedback mechanism, limits the rotation angle. When the rotation limiting mechanism rotates to the set angle, the signal feedback mechanism sends a signal to the PLC, which then controls the power mechanism to stop and reverse. The power mechanism includes a drive motor and a gearbox, with the drive motor and gearbox connected by bolts.

2. The aircraft rotary joint durability testing bench according to claim 1, characterized in that: The rotary limiting mechanism includes a drive disc and a limiting baffle. The drive disc and the limiting baffle are fixed together by bolts. The drive disc is connected to the gearbox by a flat key and fixed to the main body of the frame by a drive mounting bracket. The rotating end of the rotary joint is connected to the drive disc.

3. The aircraft rotary joint durability testing bench according to claim 2, characterized in that: The limit baffle remains vertical in the initial state.

4. The aircraft rotary joint durability testing bench according to claim 1, characterized in that: The signal feedback mechanism is a proximity switch, which is mounted on the main body of the platform via a proximity switch bracket. When the rotation limit mechanism approaches, the proximity switch is activated, sending a signal to the PLC, which then controls the power mechanism to stop and reverse.

5. The aircraft rotary joint durability testing bench according to claim 4, characterized in that: The height of the proximity switch bracket is adjustable, and its installation position relative to the main body of the stand is also adjustable.

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