A device for testing the performance of an elastic element

Abstract

The application belongs to the technical field of fatigue test, and discloses a performance testing device of elastic element, which comprises a clamping loading device, the clamping loading device is of a structure with a rigid frame at one end and a long shaft at the other end, the bearing end of an elastic element test piece vertically extends into the rigid frame of the clamping loading device, a pin shaft passes through the centers of two frame edges of the rigid frame of the clamping loading device and the bearing hole of the elastic element test piece to fix the elastic element test piece and the clamping loading device, the other end of the elastic element test piece is connected with a radial loading device, and the long shaft end of the clamping loading device is rotatably connected with a torsional force applying device. The application relates to a performance testing device of a new type of elastic element, successfully solves the problem of testing axial direction bending stiffness under the condition of applying radial force, avoids the possibility of additional force along the radial direction when applying torsion, and realizes no mutual interference along the radial force and the axial direction, and the loading load completely meets the loading requirements of the test piece in flight.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fatigue test, and relates to a fatigue test device for an elastic element, in particular to a performance test device for an elastic element. BACKGROUND

[0002] The elastic element is a commonly used component in a helicopter rotor system, and is widely used in a rotor blade damper. In the design of the rotor system, the elastic rod end bearing is a kind of bearing-like device combined by an elastic element and a metal sheet, and the performance index test of the device requires the application of a radial pre-tightening force and a bending moment in the axial direction.

[0003] The conventional force applying device is difficult to directly apply force to the elastic rod end bearing, and generally adopts a mode of providing force to the elastic rod from the side when the elastic rod end bearing is fixed on the elastic rod, so as to test the bending stiffness of the fixed elastic rod end bearing. However, the design is difficult to accurately measure the bending angle of the fixed elastic rod end bearing, and the deformation of the elastic rod itself also affects the accuracy of the measurement.

[0004] Therefore, how to better simulate the actual boundary condition and accurately obtain accurate performance data is a technical problem to be solved in the industry. SUMMARY

[0005] The application provides a performance test device for an elastic element, which solves the simulation and loading problems of the elastic rod end bearing, and can test the axial direction bending stiffness under the application of the radial force.

[0006] The technical scheme of the application is as follows:

[0007] A performance test device for an elastic element, which comprises a clamping and loading device, the clamping and loading device is a structure with a rigid frame at one end and a long shaft at the other end, the bearing end of the elastic element test piece is vertically inserted into the rigid frame of the clamping and loading device, a pin shaft passes through the centers of two frame edges of the rigid frame of the clamping and loading device and the bearing hole of the elastic element test piece to fix the elastic element test piece and the clamping and loading device, and the other end of the elastic element test piece is connected to a radial loading device, and the long shaft end of the clamping and loading device is rotatably connected to a torsional force applying device.

[0008] Further, the other end of the fixed radial loading device is connected to a radial force loading connector, and the radial force loading connector is connected to a first force loading device.

[0009] Further, the fixed radial loading device is supported by a sliding support pair, and the fixed radial loading device can slide along the radial force.

[0010] Further, the rigid frame of the clamping loading device is provided with a short shaft on the opposite side of the long shaft, and the at least two rotating support devices support the short shaft and the long shaft of the clamping loading device respectively, so that the clamping loading device can rotate relative to the rotating support devices.

[0011] Further, the connecting part of the rotating support device and the clamping loading device is provided with a bearing.

[0012] Further, the torque loading joint is fixedly connected with the end of the long shaft of the clamping loading device, and the top rotating shaft of the torque loading joint is connected with the second force loading device.

[0013] Further, the angle sensor is arranged between the rotating support device and the short shaft of the clamping loading device to monitor the rotation angle of the short shaft relative to the rotating support device.

[0014] Further, the torque sheet is attached to the long shaft of the clamping loading device.

[0015] The beneficial effects of the present application are as follows:

[0016] 1. The present application relates to a performance testing device of a new type of elastic element, which successfully solves the problem of testing the axial direction bending stiffness under the condition of applying radial force, avoids the possibility of generating additional force in the radial direction when applying torque, and realizes the application of force in the radial direction and the axial direction without mutual interference.

[0017] 2. The present application can adjust the corresponding force and torque according to the application requirements, so that the loading load fully meets the loading load requirements of the test piece in flight. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure diagram of the performance testing device of the elastic element of the present application is shown in the figure.

[0019] Figure 2 The structure diagram of the performance testing device of the elastic element of the present application is shown in the figure.

[0020] In the figure, 1 is an elastic element test piece, 2 is a clamping loading device, 3 is a pin shaft, 4 is a fixed radial loading device, 5 is a radial force loading joint, 6 is a pin shaft, 7 is a first force loading device, 8 is a sliding support pair, 9 is a rotating support device, 10 is a torque loading joint, 11 is a fixing device, 12 is a second force loading device, 13 is a pin, 14 is an angle sensor, and 15 is a bearing. DETAILED DESCRIPTION

[0021] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0022] The performance testing device of the elastic element comprises a clamping loading device 2, which is in a structure with a rigid frame at one end and a long shaft at the other end, the bearing end of an elastic element test piece 1 vertically extends into the rigid frame of the clamping loading device 2, a pin shaft 3 passes through the centers of two frame edges of the rigid frame of the clamping loading device 2 and the bearing hole of the elastic element test piece 1 to fix the elastic element test piece 1 and the clamping loading device 2, and the other end of the elastic element test piece 1 is connected to a fixed radial loading device 4, and the long shaft end of the clamping loading device 2 is rotatably connected to a torsional force applying device.

[0023] The other end of the fixed radial loading device 4 is connected to a radial force loading joint 5, and the radial force loading joint 5 is connected to a first force loading device 7.

[0024] The fixed radial loading device 4 is supported by a sliding support pair 8 in the middle, and the fixed radial loading device 4 can slide along the radial force.

[0025] The rigid frame of the clamping loading device 2 is also provided with a short shaft on the opposite side of the long shaft, at least two rotating support devices 9 support the short shaft and the long shaft of the clamping loading device 2 respectively, and the clamping loading device 2 can rotate relative to the rotating support devices 9.

[0026] A bearing is arranged at the connection between the rotating support device 9 and the clamping loading device 2.

[0027] A torsional loading joint 10 is further included, the side surface of the torsional loading joint 10 is fixedly connected to the long shaft end of the clamping loading device 2, and the top end rotating shaft of the torsional loading joint 10 is connected to a second force loading device 12.

[0028] An angle sensor 14 is further included, which is arranged between the rotating support device 9 and the short shaft of the clamping loading device 2 to monitor the rotation angle of the short shaft relative to the rotating support device 9.

[0029] A torque sheet is further included, which is pasted on the long shaft of the clamping loading device 2.

[0030] Another embodiment of the present application will be described below with reference to the accompanying drawings.

[0031] The performance testing device of the elastic element solves the problem of testing the axial direction bending stiffness under the condition of applying a radial force, so as to meet the test requirements of testing the axial direction bending stiffness under the condition of the real elastic element being subjected to a radial force.

[0032] The technical scheme of the present application is: a performance testing device of elastic element, comprising:

[0033] The loading object of the performance testing device is an elastic element test piece 1 or other shaped elastic element test piece (hereinafter referred to as test piece 1), one end of the test piece 1 is connected by a pin shaft 3 or other fixing mode; the other end of the test piece 1 is fixed by a fixed radial loading device 4, the fixed radial loading device 4 is connected with a radial force (Z direction) loading joint 5 through a pin shaft 6, the radial force (Z direction) loading joint 5 is connected with a first force loading device 7, which can be an actuator or other force loading execution mechanism, to implement loading of the test piece 1 along the radial direction (Z direction). The fixed radial loading device 4 is supported by a sliding support pair 8 in the middle, allowing the fixed radial loading device 4 to slide along the radial force (Z direction). The clamping loading device 2 is supported by a fixed support device 9 in the Y direction, and is distributed as Figure 1 The fixed support device 9 is distributed as Figure 1 The other end (loading end) of the test piece 1, the fixed support device 9 is fixed to the ground. The clamping loading device 2 can rotate perpendicular to the Y direction. The top end of the fixed radial loading device 4 is connected with a torsion loading joint 10 through a fixing device 11, the torsion loading joint 10 is connected with a second force loading device 12 (which can be an actuator or other force loading execution mechanism) through a pin 13, to implement torsion load of the test piece along the Y direction. The angle and torque during loading can be monitored by installing an angle sensor and pasting a torque measuring sheet on the clamping loading device 2, and the bending stiffness measurement data along the Z direction can be obtained through general data processing method.

[0034] The key points of the present application are:

[0035] 1. The performance testing device of the new type elastic element relates to the present application, which successfully solves the problem of testing the axial direction bending stiffness under the condition of applying radial force, and avoids the possibility of generating additional force along the radial direction when applying torsion;

[0036] 2. In the device, the force applied along the radial direction (Z direction) and the force applied along the axial direction (Y direction) have no mutual interference, and can be adjusted according to the application requirements, so that the loading load fully meets the load requirements of the test piece in flight;

[0037] 3. In the device, the sliding support pair 8 not only limits the degrees of freedom of the fixed radial loading device 4 along the X direction and the Y direction, but also bears the reaction bending moment of the test piece 1 during loading.

[0038] Specific reference is made to the accompanying drawings Figure 2 The purpose of the present application is achieved.

[0039] The above merely describes specific embodiments of the present application, and the detailed description of the present application is not exhaustive of conventional technology. However, the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. The protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A performance testing device for an elastic element, characterized in that, The device includes a clamping loading device (2), which has a rigid frame at one end and a long shaft at the other end. The bearing end of the elastic element test piece (1) extends vertically into the rigid frame of the clamping loading device (2). The pin (3) passes through the center of the two side frames of the rigid frame of the clamping loading device (2) and the bearing hole of the elastic element test piece (1) to fix the elastic element test piece (1) to the clamping loading device (2). The other end of the elastic element test piece (1) is connected to a fixed radial loading device (4). The end of the long shaft of the clamping loading device (2) is rotatably connected to a torsional force application device. The fixed radial loading device (4) is supported in the middle by a sliding support pair (8), and the fixed radial loading device (4) can slide along the radial force; The rigid frame of the clamping loading device (2) is provided with a short shaft on the outer side opposite to the long shaft. At least two rotating support devices (9) support the short shaft and the long shaft of the clamping loading device (2) respectively, and the clamping loading device (2) can rotate relative to the rotating support device (9).

2. The performance testing device for an elastic element according to claim 1, characterized in that, The other end of the fixed radial loading device (4) is connected to the radial force loading joint (5), and the radial force loading joint (5) is connected to the first force loading device (7).

3. The performance testing device for an elastic element according to claim 1, characterized in that, A bearing is provided at the connection between the rotating support device (9) and the clamping loading device (2).

4. The performance testing device for an elastic element according to claim 1, characterized in that, It also includes a torsion loading joint (10), the side of which is fixedly connected to the long shaft end of the clamping loading device (2), and the top shaft of the torsion loading joint (10) is connected to the second force loading device (12).

5. The performance testing device for an elastic element according to claim 1, characterized in that, It also includes an angle sensor (14), which is located between the rotating support device (9) and the short shaft of the clamping loading device (2) to monitor the rotation angle of the short shaft relative to the rotating support device (9).

6. The performance testing device for an elastic element according to claim 1, characterized in that, It also includes torque plates, which are attached to the long shaft of the clamping loading device (2).

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