Rail transit vehicle wheel fatigue testing device and method

Abstract

The present application belongs to the field of rail transit vehicle testing technology, and particularly relates to a rail transit vehicle wheel fatigue testing device and method. The device comprises a mounting seat, two actuating cylinders arranged side by side on the upper surface of the mounting seat, a force sensor installed on the upper end of the actuating cylinder, a first bearing seat connected to the upper end of the force sensor, a wheel shaft rotatably arranged between the two first bearing seats, a wheel installed on the wheel shaft, a universal coupling connecting the output shaft of a first motor to one end of the wheel shaft, a base arranged between the two actuating cylinders, two second bearing seats symmetrically installed on the base, a synchronous wheel installed on the rotating shaft between the two second bearing seats, the synchronous wheel being in contact with the wheel, a second motor installed on one side of one of the second bearing seats, and the output shaft of the second motor being connected to the rotating shaft. The present application can perform different standard tests on the wheel, such as EN standard fatigue test and GOST standard fatigue test.

Description

Technical Field

[0001] This invention belongs to the field of rail transit vehicle testing technology, specifically relating to a rail transit vehicle wheel fatigue testing device and method. Background Technology

[0002] With the development of technology, high-speed trains have become the preferred mode of transportation for people. As one of the most important core components of high-speed trains, the working stability of the wheels is directly related to the safety of vehicle operation; therefore, before being put into use, fatigue operation tests need to be conducted on the wheels to comprehensively verify their design, processing and manufacturing.

[0003] In publicly available reports of existing technologies, the rotational bending fatigue testing of wheels is still limited to cantilever beam type rotational bending fatigue test benches, which rely on resonance with the eccentric vibration of the motor to complete the test. Under the premise of ensuring that the bending moment meets the standard, the natural frequency of its test system is generally low, resulting in a long test cycle. Summary of the Invention

[0004] This invention provides a fatigue testing device and method for rail transit vehicle wheels to address the above-mentioned problems.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A fatigue testing device for rail transit vehicle wheels includes a mounting base. Two actuating cylinders are arranged side-by-side on the upper surface of the mounting base. A force sensor is installed at the upper end of each actuating cylinder. A first bearing seat is connected to the upper end of the force sensor. An axle is rotatably arranged between the two first bearing seats. A wheel is mounted on the axle. One end of the axle is connected to the output shaft of a first motor via a universal coupling. A base is provided between the two actuating cylinders. Two second bearing seats, symmetrically arranged, are installed on the base. A synchronous pulley is installed between the two second bearing seats via a rotating shaft. The synchronous pulley is in contact with the wheel. A second motor is installed on one side of one of the second bearing seats. The output shaft of the second motor is connected to the rotating shaft to drive the synchronous pulley to rotate, ensuring that the linear speed of the synchronous pulley and the wheel are consistent.

[0007] Furthermore, the mounting base is provided with a support seat corresponding to each actuating cylinder, the support seat being used to support and protect the actuating cylinder.

[0008] Furthermore, the upper end of the actuating cylinder passes through the support base and is located above the support base. Guide columns are provided on both the front and rear sides of the actuating cylinder, and the guide columns are installed between the first bearing seat and the support base.

[0009] Further, a connecting block is fixedly arranged at the upper end of the force sensor, the guide column is arranged between the support base and the connecting block, and connecting rods are hingedly connected to the front and rear sides of the first bearing seat.

[0010] Further, a guide seat is mounted on the upper surface of the support base, a guide block is arranged on the side of the connecting rod close to the guide seat, and a guide groove corresponding to the guide block is arranged on the guide seat.

[0011] A rail transit vehicle wheel fatigue test method comprises EN standard fatigue test and GOST standard fatigue test.

[0012] When the EN standard fatigue test is performed, two actuators apply constant load to the wheel through the wheel shaft, and a first motor drives the wheel to rotate through a universal coupling.

[0013] When the GOST standard fatigue test is performed, two actuators apply sinusoidal load to the wheel through the wheel shaft, and a first motor does not work, and the wheel does not rotate.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] The present application can test the wheel under different standards, when two actuators apply constant load to the wheel, and a first motor drives the wheel to rotate through a universal coupling, the EN standard fatigue test is performed, when the first motor does not work, and the wheel does not rotate, two actuators apply sinusoidal load to the wheel, the GOST standard fatigue test is performed, and when two actuators apply road spectrum load to the wheel, the dynamics, wear and fatigue characteristics of the wheel under given line conditions can be verified.

[0016] The present application directly drives the wheel to rotate through a first motor, compared with the original resonance method, the present application is not limited by the inherent frequency of the test system, and the test speed is greatly improved.

[0017] The present application drives a synchronous wheel to rotate through a second motor, and controls the rotation speed of the synchronous wheel, when the linear speed of the synchronous wheel and the wheel is consistent, the relative motion trend between the two can be eliminated, so that the rolling contact fatigue of the wheel rim part is eliminated, and the wheel rim rupture is avoided to affect the test; when there is a certain linear speed difference between the synchronous wheel and the wheel, the wheel can be tested under different slip rates.

[0018] The present application sets a guide column to ensure that the actuator will not be bent under large load, and the force output by the actuator is always kept on a vertical straight line, so as to meet the requirement of large load output of the present application.

[0019] The application can also simulate the dynamic characteristics of the axle under acceleration and deceleration conditions and test the heat distribution caused by braking by increasing the brake disc. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a structural schematic diagram of the application;

[0021] Figure 2 The figure is a structural schematic diagram of the application Figure 1 The figure is a partial enlarged view of circle A in the application;

[0022] Figure 3 The figure is a partial enlarged view of circle B in the application; Figure 1 The figure is a partial enlarged view of circle B in the application;

[0023] In the figure, the mounting seat is 1, the actuating cylinder is 2, the force sensor is 3, the first bearing seat is 4, the axle is 5, the wheel is 6, the universal coupling is 7, the first motor is 8, the base is 10, the second bearing seat is 11, the synchronous wheel is 12, the support seat is 13, the guide column is 14, the connecting block is 15, the connecting rod is 16, the guide seat is 17, the guide block is 18, and the guide groove is 19. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical solutions of the application, the application is further described below through examples.

[0025] As Figures 1 to 3The rail transit vehicle wheel fatigue test device shown, a mounting seat 1, two actuating cylinders 2 are arranged side by side on the upper surface of the mounting seat 1, a support seat 13 corresponding to the actuating cylinder 2 is arranged on the mounting seat 1, the support seat 13 is used for supporting and protecting the actuating cylinder 2, the upper end of the actuating cylinder 2 penetrates through the support seat 13 and is located above the support seat 13, a force sensor 3 is installed on the upper end of the actuating cylinder 2, a connecting block 15 is fixedly arranged on the upper end of the force sensor 3, a guide column 14 is arranged between the connecting block 15 and the support seat 13, a first bearing seat 4 is arranged above the connecting block 15, a connecting rod 16 is hinged on the front and rear sides of the first bearing seat 4, the lower ends of the two connecting rods 16 are respectively hinged to the front and rear sides of the corresponding connecting block 15, a guide seat 17 is installed on the upper surface of the support seat 13, a guide block 18 is arranged on the side of the connecting rod 16 close to the guide seat 17, a guide groove 19 corresponding to the guide block 18 is arranged on the guide seat 17, a wheel shaft 5 is rotatably arranged between the two first bearing seats 4, a wheel 6 is installed on the wheel shaft 5, a universal joint 7 is connected between one end of the wheel shaft 5 and the output shaft of a first motor 8, a base 10 is arranged between the two actuating cylinders 2, two second bearing seats 11 symmetrical to each other are installed on the base 10, a synchronous wheel 12 is installed between the two second bearing seats 11 through a rotating shaft, the synchronous wheel 12 is in contact with the wheel 6, a second motor is installed on one side of one of the second bearing seats 11, the output shaft of the second motor is connected with the rotating shaft, used for driving the synchronous wheel 12 to rotate, ensuring that the linear speed of the synchronous wheel 12 and the wheel 6 is consistent.

[0026] A rail transit vehicle wheel fatigue test method, comprising EN standard fatigue test and GOST standard fatigue test;

[0027] When the EN standard fatigue test is carried out, the two actuating cylinders 2 apply constant load to the wheel 6 through the wheel shaft 5, and the first motor 8 drives the wheel 6 to rotate through the universal joint 7.

[0028] When the GOST standard fatigue test is carried out, the two actuating cylinders 2 apply sinusoidal load to the wheel 6 through the wheel shaft 5, and the first motor 8 does not work, and the wheel 6 does not rotate.

[0029] The foregoing merely illustrates the principles of the application and applies only to the particular cases described and illustrated herein. It will be apparent to those skilled in the art that the application can be practiced with modifications and alterations numerous and numerous combinations of the above-described elements and components and in many different embodiments. Accordingly, the application seeks and employs to incorporate all such variations and alterations and combinations thereof as come within the scope of the following claims and equivalents thereof.

[0030] Furthermore, it should be understood that although the present specification has been described in language specific to structural features, methodological acts, or computer structural features, it is to be understood that the application defined in the appended claims can be embodied in other specific forms without the use of structural or methodological acts, or a computer structural features.

Claims

1. A rail vehicle wheel fatigue testing apparatus, characterized by: The utility model provides a kind of test device for wheel fatigue test, including mounting seat (1), two actuating cylinders (2) are provided with on the upper surface of the mounting seat (1) side by side, force sensor (3) is installed on the upper end of the actuating cylinder (2), connecting block (15) is fixedly provided on the upper end of the force sensor (3), a bearing seat (4) is provided above the force sensor (3), connecting rod (16) is hinged on the front and rear sides of the a bearing seat (4), the lower end of two connecting rods (16) is respectively hinged with the front and rear sides of corresponding connecting block (15), wheel shaft (5) is rotatably arranged between two a bearing seat (4), wheel (6) is installed on the wheel shaft (5), one end of the wheel shaft (5) is connected with the output shaft of a motor (8) by universal coupling (7), base (10) is provided between two actuating cylinders (2), two bearing seats (11) that are left-right symmetrical are installed on the base (10), synchronous wheel (12) is installed by rotating shaft between two bearing seats (11), the synchronous wheel (12) is in contact with wheel (6), a motor is installed on the side of one bearing seat (11), the output shaft of the motor is connected with rotating shaft, for driving synchronous wheel (12) rotation, ensure that the linear velocity of synchronous wheel (12) and wheel (6) rotation is consistent.

2. The rail transit vehicle wheel fatigue testing device according to claim 1, characterized in that: Support seat (13) corresponding to actuating cylinder (2) is provided on the mounting seat (1), and the support seat (13) is used for supporting and protecting the actuating cylinder (2).

3. The rail transit vehicle wheel fatigue testing device of claim 2, wherein: The upper end of the actuating cylinder (2) passes through the support seat (13) and is located above the support seat (13), and guide columns (14) are provided on the front and rear sides of the actuating cylinder (2), and the guide columns (14) are installed between the a bearing seat (4) and the support seat (13).

4. The rail transit vehicle wheel fatigue testing device of claim 3, wherein: The guide columns (14) are arranged between the support seat (13) and the connecting block (15).

5. The rail transit vehicle wheel fatigue testing device of claim 4, wherein: A guide seat (17) is installed on the upper surface of the support seat (13), a guide block (18) is arranged on the side of the connecting rod (16) close to the guide seat (17), and a guide groove (19) corresponding to the guide block (18) is arranged on the guide seat (17).

6. The method for testing the fatigue of the wheel of the rail transit vehicle based on the testing device according to claim 5, characterized in that: It includes EN standard fatigue test and GOST standard fatigue test; When the EN standard fatigue test is carried out, two actuating cylinders (2) apply constant load to wheel (6) through wheel shaft (5), and a motor (8) drives wheel (6) to rotate through universal coupling (7); When the GOST standard fatigue test is carried out, two actuating cylinders (2) apply sinusoidal load to wheel (6) through wheel shaft (5), and a motor (8) does not work, and wheel (6) does not rotate.

Images