Fatigue test equipment for aviation flexible joint

Abstract

The utility model discloses fatigue testing equipment for an aviation flexible joint, and belongs to the technical field of aviation flexible joint testing. Comprising a linear sliding table module, a servo motor, a first fixed support, a flexible joint, a first connecting rod, a tension sensor, a second connecting rod and a third connecting rod; the linear sliding table module comprises a base, a sliding rail located on the base, a lead screw located in the base and connected with the servo motor, and a sliding table located on the lead screw and slidably connected with the sliding rail. The first fixed support is fixedly connected with the base, and the flexible joint is vertically and fixedly arranged at the top of the first fixed support; the third connecting rod is vertically and fixedly arranged at the top of the sliding table; the top of the flexible connector is fixedly connected with the top of the third connecting rod through the first connecting rod, the tension sensor and the second connecting rod in sequence. According to the fatigue test equipment disclosed by the utility model, the fatigue test of the aviation flexible joint can be quickly and efficiently carried out, the manpower and the time are saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation flexible joint testing, in particular to fatigue testing equipment for aviation flexible joints. Background Art

[0002] During the aerospace production process, piping systems must withstand harsh operating environments such as high temperature, high pressure, and vibration. Flexible joints provide cushioning, shock absorption, compensation, and vibration absorption to ensure the proper functioning of the aerospace. During the development process, flexible joints require fatigue life testing. Typically, fatigue testing of flexible joints requires repeated manual manipulation based on experience. This not only makes it difficult to achieve consistent operating force, but also presents technical challenges such as laborious and inefficient testing. Summary of the Invention

[0003] The purpose of the utility model is to provide a testing device capable of efficiently and accurately testing the fatigue life of aviation flexible joints.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A fatigue testing device for aviation flexible joints, comprising a linear slide module, a servo motor, a first fixed support, a flexible joint, a first connecting rod, a tension sensor, a second connecting rod, and a third connecting rod; the linear slide module comprises a base, a slide rail on the base, a screw rod located in the base and connected to the servo motor, and a slide located on the screw rod and slidably connected to the slide rail; the first fixed support is fixedly connected to the base, and the flexible joint is vertically fixed on the top of the first fixed support; the third connecting rod is vertically fixed on the top of the slide; the top of the flexible joint is fixedly connected to the top of the third connecting rod through the first connecting rod, the tension sensor, the second connecting rod, and the third connecting rod in sequence.

[0006] Preferably, a center line connecting the third connecting rod and the flexible joint is parallel to the axis of the linear slide module.

[0007] Preferably, the first fixing support is composed of a first half body and a second half body connected together, and a mounting hole for mounting the flexible joint is formed in the middle of the first half body and the second half body after the connection.

[0008] Preferably, it also includes a second fixed support for fixing the linear slide module.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] 1. The linear slide module and servo motor control device are used to solve the problem of flexible joint fatigue test, which can replace manual repeated testing and is labor-intensive and time-consuming.

[0011] 2. By using tension and compression sensors for detection, the sample connecting rod can be used to monitor in real time whether the test tooling is loose under preset constraint conditions. This is more accurate than manual visual observation and improves test accuracy.

[0012] 3. By controlling the operation of the servo motor, the swing range of the flexible joint fatigue test can be precisely controlled, and the swing amplitude control in the range of 10-40mm can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the overall structure diagram;

[0014] Figure 2 This is the structural diagram of the linear slide module;

[0015] Figure 3 This is a structural diagram of the first fixed support;

[0016] Figure 4 This is a structural diagram of the flexible joint.

[0017] In the figure: 1. Linear slide module; 1-1. Base; 1-2. Slide rail; 1-3. Screw rod; 1-4. Slide; 2. First fixed support; 2-1. First half; 2-2. Second half; 2-3. Mounting hole; 3. Second fixed support; 4. Flexible joint; 5. First connecting rod; 6. Tension sensor; 7. Second connecting rod; 8. Third connecting rod; 9. Servo motor. DETAILED DESCRIPTION

[0018] The structure and principle of the present invention are now fully explained in conjunction with specific embodiments so that those skilled in the art can fully understand and implement them.

[0019] like Figure 1 As shown, the utility model discloses a fatigue testing device for aviation flexible joints, including a linear slide module 1, a servo motor 9, a first fixed support 2, a flexible joint 4, a first connecting rod 5, a tension sensor 6, a second connecting rod 7, and a third connecting rod 8.

[0020] like Figure 2 As shown, the linear slide module 1 includes a base 1-1, a slide rail 1-2 located on the base 1-1, a screw rod 1-3 located in the base 1-1 and connected to the servo motor 9, and a slide 1-4 located on the screw rod 1-3 and slidably connected to the slide rail 1-2.

[0021] like Figure 3 The structure diagram of the first fixed support 2 is shown; Figure 4 Shown is a structural diagram of the flexible joint 4.

[0022] Among them: the first fixed support 2 is fixedly connected to the base 1-1, the flexible joint 4 is vertically fixed on the top of the first fixed support 2; the third connecting rod 8 is vertically fixed on the top of the slide 1-4; the top of the flexible joint 4 is fixedly connected to the top of the third connecting rod 8 through the first connecting rod 5, the tension sensor 6, the second connecting rod 7 in sequence.

[0023] The linear slide module 1 and the flexible joint 4 are fixed by the first fixed support 2; by controlling the servo motor 9, the slide 1-4 is driven by the screw 1-3, and the reciprocating motion of the flexible joint 4 (i.e., the sample to be tested) is controlled by the third connecting rod 8, the second connecting rod 7, the tension sensor 6, and the first connecting rod 5 connected to the slide 1-4 in sequence. At the same time, the numerical display of the tension sensor 6 is monitored to ensure that the entire test is carried out under predetermined constraints. Fatigue tests are repeated in this way to finally observe whether the product (i.e., the flexible joint 4) is cracked or damaged.

[0024] Figure 4 This is a common flexible joint design. To facilitate installation, the first fixing support 2 consists of a first half 2-1 and a second half 2-2 joined together. The center of these two halves forms a mounting hole 2-3 for the flexible joint 4. To facilitate quick installation, the end connecting the first connecting rod 5 to the flexible joint 4 is equipped with a plug that docks with the through hole of the flexible joint 4. The second and third connecting rods 7 and 8 are each equipped with a quick-connect post and a through hole.

[0025] Preferably, a center line connecting the third connecting rod 8 and the flexible joint 4 is parallel to the axis of the linear slide module 1 .

[0026] Preferably, the apparatus further comprises a second fixing support 3 for fixing the linear slide module 1. The linear slide module 1 is fixed to the workbench by the second fixing support 3, thereby reducing equipment vibration that may be caused by the operation of the servo motor 9 and improving the accuracy of the test.

[0027] The device of this embodiment eliminates the need for manual operation when performing fatigue testing on flexible joints, significantly reducing test time and labor costs. The servo motor controls the swing range of the flexible joint, achieving a more precise swing range of 10-40mm (allowing for accurate test results and high efficiency).

[0028] The above embodiments are merely preferred embodiments of the present invention and are not intended to constitute any formal limitation on the present invention. Any person skilled in the art can, without departing from the technical principles and scope of the present invention, utilize the methods disclosed above to make many possible changes and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments with equivalent variations. Therefore, any combination, modification, or replacement of the technical features disclosed in the present invention based on the technical essence of the present invention, without departing from the principles or scope of the present invention, shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fatigue testing device for aviation flexible joints, characterized in that: The invention comprises a linear slide module (1), a servo motor (9), a first fixed support (2), a flexible joint (4), a first connecting rod (5), a tension sensor (6), a second connecting rod (7), and a third connecting rod (8); the linear slide module (1) comprises a base (1-1), a slide rail (1-2) located on the base (1-1), a screw rod (1-3) located in the base (1-1) and connected to the servo motor (9), and a slide (1-4) located on the screw rod (1-3) and slidably connected to the slide rail (1-2); the first fixed support (2) is fixedly connected to the base (1-1), the flexible joint (4) is vertically fixed on the top of the first fixed support (2); the third connecting rod (8) is vertically fixed on the top of the slide (1-4); the top of the flexible joint (4) is fixedly connected to the top of the third connecting rod (8) through the first connecting rod (5), the tension sensor (6), the second connecting rod (7), and the top of the third connecting rod (8) in sequence.

2. A fatigue testing device for aviation flexible joints according to claim 1, characterized in that: The center line connecting the third connecting rod (8) and the flexible joint (4) is parallel to the axis of the linear slide module (1).

3. A fatigue testing device for aviation flexible joints according to claim 2, characterized in that: The first fixed support (2) is composed of a first half body (2-1) and a second half body (2-2) connected together, and a mounting hole (2-3) for mounting the flexible joint (4) is formed in the middle of the first half body (2-1) and the second half body (2-2) after being connected together.

4. A fatigue testing device for aviation flexible joints according to any one of claims 1 to 3, characterized in that: It also includes a second fixed support (3) for fixing the linear slide module (1).

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