High and low temperature test bearing test bench

Abstract

The invention relates to a high and low temperature test bearing test bench, which comprises a test bench, and is characterized in that the test bench is provided with a high and low temperature environment box and a measurement and control system; a main machine frame is arranged in the test bench, an axial force value loading mechanism is arranged on one side of the main machine frame, a radial force value loading mechanism is arranged below the main machine frame, and a supporting bearing seat, an axial swing mechanism and an angle measuring mechanism are sequentially arranged above the main machine frame. The test bed mainly meets the requirement for durability test of the miniature knuckle bearing under the condition that the miniature knuckle bearing is subjected to complex loads in high and low temperature environments, and can meet the test requirement of the miniature knuckle bearing in the high and low temperature environments and a multi-axis loading environment.

Description

Technical Field

[0001] The invention relates to the technical field of test benches, and mainly to a high and low temperature testing bearing test bench. Background Art

[0002] Miniature spherical bearings are widely used in aerospace, engineering machinery, and automation equipment. Due to the complex use environment and working conditions, the use of bearings has relatively stringent requirements. Excessive temperature rise will change the rheological properties of the bearing lubricant, thereby affecting the service performance of the bearing under high temperature conditions, resulting in bearing bonding, fracture and other failure phenomena; the bearing performance in low temperature environments will also change significantly, and it may also become stuck due to inconsistent shrinkage properties of the bearing material.

[0003] In order to test the service life of miniature spherical bearings in high and low temperature complex mechanical environments, a high and low temperature multi-axis small force bearing test bench was designed to test the mechanical properties of miniature spherical bearings under multiple loads in high and low temperature environments. Summary of the invention

[0004] In view of the above problems, the present invention proposes a high and low temperature test bearing test bench.

[0005] The specific technical solutions are as follows:

[0006] A high and low temperature test bearing test bench comprises a test bench, on which a high and low temperature environment box and a measurement and control system are provided; a main frame is provided inside the test bench, an axial force value loading mechanism is provided on one side of the main frame, a radial force value loading mechanism is provided below the main frame, a supporting bearing seat, an axial swing mechanism and an angle measuring mechanism are provided above the main frame in sequence, and the supporting bearing seat and the axial force value loading mechanism are used in conjunction with each other.

[0007] The axial force value loading mechanism comprises an axial force value sensor, a pulley mechanism, a force value display, and a manual loading mechanism.

[0008] The radial force value loading mechanism comprises a spherical bearing, a buffer spring group mechanism, a wear measuring plate, a radial loading sensor, a LVDT and an electric cylinder.

[0009] The supporting bearing seat comprises a thermocouple, a bearing seat, a T-type stage, a sample clamping tool, a sample, a swing loading mechanism and a coupling.

[0010] The axial swing mechanism comprises a dynamic torque sensor, a coupling, a reducer, a motor and a rotation speed measuring mechanism.

[0011] The angle measuring mechanism comprises a synchronous transmission mechanism, a supporting bearing seat, an angle measuring coupling and an angle encoder.

[0012] The beneficial effects of the present invention are:

[0013] The invention discloses a high-low temperature multi-axis micro-force bearing test bench, which is mainly composed of a high-low temperature environment box, a measurement and control system, a main frame, an axial force loading mechanism, a radial force loading mechanism, a supporting bearing seat, an axial swing structure and an angle measuring mechanism. The test bench mainly meets the high-low temperature multi-axis loading test requirements of micro joint bearings, wherein the axial force loading mechanism adopts manual loading, is equipped with a force sensor and a digital display device, and is used to control the loading of the axial force value, the radial loading adopts electric cylinder loading, is equipped with an LVDT for electric cylinder displacement control, and is further configured with a wear measuring plate, and a laser rangefinder is used to measure and calculate the wear amount during the bearing sample test process, the axial swing mechanism adopts a servo motor to drive a reducer to provide a swing torque, is equipped with an imported torque sensor, and is configured with a speed measuring mechanism for speed measurement during the speed test; the angle measuring mechanism is mainly composed of a synchronous transmission mechanism, a supporting bearing seat, a coupling, and a swing angle encoder, and when testing the swing performance, the synchronous transmission mechanism and the swing angle encoder are connected in series with a coupling to control the reciprocating swing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the present invention.

[0015] Figure 2 This is a structural diagram of the host framework of the present invention.

[0016] Figure 3 It is a cross-sectional view of the radial force loading mechanism of the present invention.

[0017] Figure 4 It is a front view of the supporting bearing seat of the present invention.

[0018] Figure 5 This is a top view of the supporting bearing seat of the present invention.

[0019] Figure 6 It is a structural diagram of the axial swing mechanism and the angle measuring mechanism of the present invention.

[0020] In the figure: test bench 1, high and low temperature environment box 2, measurement and control system 3, main frame 4, main frame 4, axial force loading mechanism 5, radial force loading mechanism 6, support bearing seat 7, axial swing mechanism 8, angle measuring mechanism 9, axial force sensor 51, pulley mechanism 52, force display 53, manual loading mechanism 54, spherical bearing 61, buffer spring group mechanism 62, wear measuring plate 63, radial loading sensor 64, LVDT65, electric cylinder 66, thermocouple 71, bearing seat 72, T-type stage 73, sample clamping fixture 74, sample 75, swing loading mechanism 76, coupling 77, dynamic torque sensor 81, coupling 82, reducer 83, motor 84, speed measuring mechanism 85, synchronous transmission mechanism 91, support bearing seat 92, angle measurement coupling 93, angle encoder 94. DETAILED DESCRIPTION

[0021] In order to make the technical solution of the present invention clearer and more explicit, the present invention is further described below in conjunction with the accompanying drawings. Any equivalent replacement of the technical features of the technical solution of the present invention and any solution derived by conventional reasoning shall fall within the protection scope of the present invention.

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] A high and low temperature test bearing test bench comprises a test bench 1, on which a high and low temperature environment box 2 and a measurement and control system 3 are provided; a main frame 4 is provided inside the test bench 1, an axial force value loading mechanism 5 is provided on one side of the main frame 4, a radial force value loading mechanism 6 is provided below the main frame 4, and a supporting bearing seat 7, an axial swing mechanism 8 and an angle measuring mechanism 9 are provided above the main frame 4 in sequence, and the supporting bearing seat 7 is used in conjunction with the axial force value loading mechanism 5.

[0024] The axial force value loading mechanism 5 includes an axial force value sensor 51, a pulley mechanism 52, a force value display 53 and a manual loading mechanism 54, wherein the manual loading mechanism 54 applies force value to the axial force value sensor 51 and the sample by shaking the loading handle, and the force value will be displayed on the force value display 53; the pulley mechanism 52 mainly realizes the transmission of the force value, and when the force value on the force value display 53 reaches the set target value, the manual loading mechanism 54 is locked to ensure the stability of the force value;

[0025] The radial force loading mechanism 6 includes a joint bearing 61, a buffer spring group mechanism 62, a wear measuring plate 63, a radial loading sensor 64, an LVDT65 and an electric cylinder 66; wherein the electric cylinder 66 moves to provide a radial loading force value, the radial loading sensor 64 displays the measurement and displays the force value in the measurement and control system, and controls the magnitude of the loading force value; wherein the LVDT65 is used to measure the displacement of the electric cylinder, and the buffer spring group mechanism 52 is mainly used to provide buffering to prevent the system from generating an overshoot force value when starting, thereby causing damage to the radial loading sensor; the wear measurement plate 63 is used to measure the wear of the miniature joint bearing under long-term use; the joint bearing 61 is used to ensure that both the radial loading force value and the axial loading force value can act on the sample.

[0026] The supporting bearing seat 7 includes a thermocouple 71, a bearing seat 72, a T-type stage 73, a sample clamping tool 74, a sample 75, a swing loading mechanism 76 and a coupling 77, wherein the thermocouple 71 is mainly used to measure the surface size of the bearing outer ring; the bearing seat 72 mainly supports the loading and transmits the swing torque; the T-type stage 73 ensures that the bearing seat can move freely on the table, which is convenient for the installation and disassembly of the sample; the sample clamping tool 74 mainly ensures that the sample 75 is installed reliably and the force value is transmitted reliably; the coupling 77 is mainly used to ensure the stability of the torque loading, and at the same time ensures that the overall tooling is easy and quick to disassemble and install in the environmental chamber.

[0027] The axial swing mechanism 8 includes a dynamic torque sensor 81, a coupling 82, a reducer 83, a motor 84 and a speed measuring mechanism 85, wherein the motor 84 and the reducer 83 combine to provide sufficient torque, and the motor 84 adopts a servo motor to ensure the high efficiency of the reciprocating motion rotation frequency; the speed measuring mechanism 85 is used to measure the test speed; the coupling 82 adopts a large torque coupling to ensure that the influence of the deformation of the coupling 82 on the measurement result is minimized.

[0028] The angle measuring mechanism 9 includes a synchronous transmission mechanism 91, a supporting bearing seat 92, an angle measuring coupling 93 and an angle encoder 94, wherein the synchronous transmission mechanism 91 is composed of a synchronous belt and a synchronous pulley, and cooperates with the supporting bearing seat 92 to ensure the reliability of the swing angle transmission; the high-precision angle encoder 94 is mainly used for measuring the swing angle of the bearing rotational motion, and the angle measuring coupling 93 ensures that the connection between the high-precision angle encoder and the main frame can be disconnected when performing a speed loading test, thereby protecting the safety of the use of the high-precision angle encoder.

[0029] Among them, the high and low temperature environmental chamber is mainly responsible for providing the overall test environment to ensure that the overall test is carried out in a stable and reliable environment; the measurement and control system ensures the long-term operation stability of the main engine; the axial force loading mechanism mainly provides axial loading force for the specimen; the main engine frame ensures that the connections of various mechanisms are firm and the equipment runs stably; the radial force loading mechanism mainly provides a radial loading force for the specimen, and at the same time, the ball head mechanism is used in the design to ensure that the radial loading mechanism does not affect the loading of the specimen by the axial loading mechanism; the supporting bearing seat is mainly used to ensure that the specimen is installed reliably, the test runs stably, and each action can effectively act on the specimen; the axial swing mechanism is mainly to ensure that the specimen can rotate in a single direction or reciprocate, and apply a torque to the specimen; the angle measurement mechanism is mainly used to control the reciprocating angle of the specimen. The high and low temperature multi-axis small force bearing test bench can meet the complex testing of miniature joint bearings under high and low temperature and multiple loading methods.

[0030] It mainly meets the durability performance test requirements of miniature spherical bearings under complex loads in high and low temperature environments. The high and low temperature environmental chamber mainly provides a reliable high and low temperature environment for the test. The measurement and control system meets the stable operation of the test control process. The axial force loading mechanism is used to apply axial tensile load to the miniature spherical bearing specimen. The main frame is used to provide reliable support for the test mechanism. The radial force loading mechanism applies radial load to the miniature spherical bearing specimen. The supporting bearing seat mainly ensures the reliable installation of the specimen and the loaded force and torque can reliably act on the miniature spherical bearing specimen. The axial swing mechanism mainly provides the axial swing torque of the miniature spherical bearing specimen. The angle measurement mechanism is used to measure the swing angle of the miniature spherical bearing. The high and low temperature multi-axis small force bearing test bench can meet the test requirements of miniature spherical bearings in high and low temperature environments and multi-axis loading environments.

[0031] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", "all around" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0032] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A high and low temperature bearing test bench, comprising a test bench (1), characterized in that: The test bench (1) is provided with a high and low temperature environment box (2) and a measurement and control system (3); a main frame (4) is provided inside the test bench (1); an axial force value loading mechanism (5) is provided on one side of the main frame (4); a radial force value loading mechanism (6) is provided below the main frame (4); a support bearing seat (7), an axial swing mechanism (8) and an angle measuring mechanism (9) are provided above the main frame (4); the support bearing seat (7) and the axial force value loading mechanism (5) are used in conjunction with each other.

2. A high and low temperature test bearing test bench as claimed in claim 1, characterized in that: The axial force value loading mechanism (5) is composed of an axial force value sensor (51), a pulley mechanism (52), a force value display (53) and a manual loading mechanism (54), wherein the manual loading mechanism (54) applies a force value to the axial force value sensor (51) by shaking a loading handle, and the force value is displayed on the force value display (53); the pulley mechanism (52) realizes the transmission of the force value, and after the force value on the force value display (53) reaches a set target value, the manual loading mechanism (54) is locked to ensure the stability of the force value.

3. A high and low temperature test bearing test bench as claimed in claim 1, characterized in that: The radial force value loading mechanism (6) is composed of a joint bearing (61), a buffer spring group mechanism (62), a wear measurement plate (63), a radial loading sensor (64), an LVDT (65) and an electric cylinder (66).

4. A high and low temperature test bearing test bench as claimed in claim 1, characterized in that: The support bearing seat (7) is composed of a thermocouple (71), a bearing seat (72), a T-shaped stage (73), a sample clamping tool (74), a sample (75), a swing loading mechanism (76) and a coupling (77).

5. A high and low temperature test bearing test bench as claimed in claim 1, characterized in that: The axial swing mechanism (8) is composed of a dynamic torque sensor (81), a coupling (82), a reducer (83), a motor (84) and a rotation speed measuring mechanism (85), wherein the motor (84) and the reducer (83) are combined to provide sufficient torque, and the motor (84) is a servo motor to ensure the high efficiency of the reciprocating rotation frequency.

6. A high and low temperature test bearing test bench as claimed in claim 1, characterized in that: The angle measurement (9) mechanism is composed of a synchronous transmission mechanism (91), a support bearing seat (92), an angle measurement coupling (93) and an angle encoder (94), wherein the synchronous transmission mechanism (91) adopts a synchronous belt and a synchronous pulley combination, and cooperates with the support bearing seat (92) to ensure the reliability of the swing angle transmission; the angle measurement coupling (93) ensures that the connection between the angle encoder (94) and the main frame (4) can be disconnected when performing a speed loading test, thereby protecting the safety of the use of the high-precision angle encoder (94).

Images