Test method for anti-rhombus rigidity of different parameters of bogie wedge

Abstract

The application provides a test method for different parameters of a bogie inclined wedge and resistance to diamond stiffness, comprising the following steps: S1, setting a simulation side frame square one and a simulation side frame square two at both ends of a bearing beam, fixing the lower end of the simulation side frame square one on a test bench base, and movably setting the lower end of the simulation frame square two on the test bench base; S2, setting simulation elastic elements between the bearing beam and the simulation side frame square one and between the bearing beam and the simulation side frame square two, one end of the simulation elastic elements falling on the simulation side frame square one and the simulation side frame square two, the other end of the simulation elastic elements being in contact with the bearing beam, and the bearing beam being internally provided with a parameter simulation device for adjusting parameters of the bogie inclined wedge. The application can test the influence of different parameters of the bogie inclined wedge on the resistance to diamond stiffness of the railway vehicle bogie, and can also perform comparative tests, which is very convenient and fast and improves the test efficiency.

Description

Technical Field

[0001] This invention relates to the field of anti-diamond stiffness testing of railway vehicle bogies, and specifically to a method for testing the anti-diamond stiffness of bogie wedges with different parameters. Background Technology

[0002] The anti-diamond stiffness test of railway vehicle bogies is conducted through physical bogies. Only the anti-diamond stiffness of a bogie can be tested, that is, the anti-diamond stiffness of a bogie with a specific wedge structure is only tested.

[0003] Currently, the anti-diamond stiffness test of railway vehicle bogies is conducted using a physical bogie. A vertical load (simulating empty and loaded cars) is applied to the center plate of the bogie bolster, and a horizontal load is applied to one side of the side frame. Displacement is used for control, and the lateral force corresponding to different displacements is measured and recorded. Then, the anti-diamond stiffness is calculated and the average value is taken.

[0004] The aforementioned device for testing the anti-diamond stiffness of railway vehicle bogies cannot be used to compare the effects of different parameters of the bogie wedge on the anti-diamond stiffness. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a test method for the anti-diamond stiffness of bogie wedges with different parameters. This invention can test the influence of bogie wedges with different parameters on the anti-diamond stiffness of railway vehicle bogies, and can also perform comparative tests, which is very convenient and quick, improving testing efficiency.

[0006] The specific technical solution is as follows:

[0007] A test method for the anti-diamond stiffness of bogie wedges with different parameters, comprising the following steps:

[0008] S1. Simulated side frame one and simulated side frame two are respectively set at both ends of the load-bearing beam. The lower end of simulated side frame one is fixed on the test bench base, and the lower end of simulated frame two is movably set on the test bench base.

[0009] S2. Simulated elastic elements are provided between the load-bearing beam and the simulated side frame one and between the load-bearing beam and the simulated side frame two. One end of each simulated elastic element rests on the simulated side frame one and the simulated side frame two, and the other end of each simulated elastic element contacts the load-bearing beam. A parameter simulation device for adjusting the bogie wedge parameters is installed inside the load-bearing beam.

[0010] S3. Apply a vertical load (simulating empty and loaded vehicles) to the center of the load-bearing beam, apply a horizontal load to one side of the simulated side frame box two, measure and record the corresponding lateral forces under different displacements, and calculate the anti-diamond stiffness.

[0011] S4. Change to different parameter simulation devices, repeat step S3, measure and record the corresponding lateral forces under different displacements, and calculate the anti-diamond stiffness.

[0012] S5. Repeat step S4 multiple times to calculate the average value of the anti-diamond stiffness.

[0013] Optionally, the parameter simulation device includes a wedge and a figure-eight pad. The two wedges are symmetrically arranged on the bearing beam along the center line of the bearing beam. The bearing beam has a figure-eight pad groove, and the figure-eight pad is suspended in the figure-eight pad groove of the bearing beam by bolts. One inclined surface of the figure-eight pad abuts against the inclined surface of the wedge, and the other inclined surface of the figure-eight pad abuts against the inclined surface of the inner wall of the groove of the bearing beam.

[0014] Optionally, the parameter simulation device further includes a secondary friction plate, which is installed on the inclined surface of the wedge near the side of the figure-eight pad, and the inclined surface of the figure-eight pad near the wedge abuts against the secondary friction plate.

[0015] Optionally, in step S4, when changing different parameter simulation devices, the anti-diamond stiffness of different parameters can be tested and compared by replacing the wedges with different apex angles and the corresponding figure-eight pads (while keeping other parameters related to the anti-diamond stiffness of the bogie unchanged).

[0016] Optionally, in step S4, when changing different parameter simulation devices, the test and comparison of anti-diamond stiffness of different parameters can be achieved by replacing the auxiliary friction plates with different friction coefficients (while keeping other parameters related to the anti-diamond stiffness of the bogie unchanged).

[0017] Optionally, in step S4, when changing different parameter simulation devices, wedges with different apex angles and auxiliary friction plates with different friction coefficients are combined (other parameters related to the anti-diamond stiffness of the bogie remain unchanged) to achieve testing and comparison of anti-diamond stiffness with different parameters.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The present invention features a wedge, a figure-eight pad, and a secondary friction plate. Different wedges correspond to different figure-eight pads. When the parameters of the wedge (such as angle) change, the parameters of the figure-eight pad (such as angle) can be adapted and adjusted accordingly. Under the condition that other conditions remain unchanged, the anti-diamond stiffness of the wedge with different parameters of the railway vehicle bogie can be tested. The combination of structural parameters that provides the maximum anti-diamond stiffness of the wedge can be analyzed, which plays a significant role in optimizing the overall structure of the bogie. Attached Figure Description

[0020] Figure 1A top view schematic diagram of the test method for the anti-diamond stiffness of bogie wedges with different parameters provided in an embodiment of the present invention;

[0021] Figure 2 This is a front view schematic diagram of the test method for the anti-diamond stiffness of bogie wedges with different parameters provided in an embodiment of the present invention;

[0022] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure along the middle AA.

[0023] In the diagram: 1. Bearing beam; 2. Simulated side frame one; 3. Simulated side frame two; 4. Simulated elastic element; 5. Parameter simulation device; 51. Wedge; 52. Herringbone pad; 53. Secondary friction plate. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0027] Reference Figures 1-3 The method for testing the anti-diamond stiffness of bogie wedges with different parameters provided in this invention includes the following steps:

[0028] S1. Simulated side frame 1 2 and simulated side frame 2 3 are set at both ends of the load-bearing beam 1 respectively. The lower end of simulated side frame 1 2 is fixed on the test bench base, and the lower end of simulated side frame 2 3 is movably set on the test bench base.

[0029] S2. Simulated elastic elements 4 (including positioning navels and springs) are provided between the load-bearing beam 1 and the simulated side frame 1 2 and between the load-bearing beam 1 and the simulated side frame 2 3. Positioning navels are installed on the simulated side frame 1 2 and the load-bearing beam 1 and the simulated side frame 2 3, and springs are sleeved around the positioning navels. One end of the simulated elastic element 4 rests on the simulated side frame 1 2 and the simulated side frame 2 3, and the other end of the simulated elastic element 4 contacts the load-bearing beam 1. The load-bearing beam 1 is equipped with a parameter simulation device 5 for adjusting the bogie wedge parameters.

[0030] S3. Apply a vertical load (simulating empty and loaded vehicles) to the center of the load-bearing beam 1, and apply a horizontal load to one side of the simulated side frame 3. Measure and record the corresponding lateral forces under different displacements, and calculate the anti-diamond stiffness.

[0031] S4. Replace the simulation device 5 with different parameters, repeat step S3, measure and record the corresponding lateral force under different displacements, and calculate the anti-diamond stiffness.

[0032] S5. Repeat step S4 multiple times to calculate the average value of the anti-diamond stiffness.

[0033] Specifically, the parameter simulation device 5 in this invention includes a wedge 51 and a figure-eight pad 52; the wedge 51 is symmetrically arranged on the lower base plate of the bearing beam 1 along the axial center line of the bearing beam 1; a figure-eight pad groove is formed on the bearing beam 1, the outer width of the figure-eight pad 52 corresponds to the figure-eight pad groove on the bearing beam 1, the inner width is adapted to the width of the wedge 51, the outer angle of the figure-eight pad 52 corresponds to the oblique angle of the figure-eight pad groove on the bearing beam 1, and the inner angle is adapted to the angle of the wedge 51; the figure-eight pad 52 is connected by screws. The bolt is suspended in the groove of the V-shaped pad 52 of the bearing beam 1. The bolt suspending the V-shaped pad 52 is loosely connected to the bearing beam 1 with a large gap. One inclined surface of the V-shaped pad 52 abuts against the inclined surface of the wedge 51, and the other inclined surface of the V-shaped pad 52 abuts against the inclined surface of the inner wall of the groove of the bearing beam 1. After bearing the load, the V-shaped pad 52 is closely attached to the bearing beam 1 and the wedge 51, so that the V-shaped pad 52 fits well with the groove of the V-shaped pad on the bearing beam 1. It is also convenient and quick to replace the V-shaped pad 52.

[0034] Reference Figure 3 The parameter simulation device 5 also includes a secondary friction plate 53, which is disposed on the inclined surface of the wedge 51 near the figure-eight pad 52, and the secondary friction plate 53 abuts against the figure-eight pad 52.

[0035] In step S4, when replacing different parameter simulation devices 5, the anti-diamond stiffness of different parameters is tested and compared by replacing the wedges 51 with different apex angles and the corresponding figure-eight pads 52 (while keeping other parameters related to the anti-diamond stiffness of the bogie unchanged).

[0036] In step S4, when replacing the simulation device 5 with different parameters, the test and comparison of anti-diamond stiffness with different parameters are achieved by replacing the auxiliary friction plate 53 with a different friction coefficient (while keeping other parameters related to the anti-diamond stiffness of the bogie unchanged).

[0037] In step S4, when replacing the simulation device 5 with different parameters, the wedges 51 with different apex angles and the auxiliary friction plates 53 with different friction coefficients are combined with each other (other parameters related to the anti-diamond stiffness of the bogie remain unchanged) to achieve the testing and comparison of anti-diamond stiffness with different parameters.

[0038] Different wedges 51 correspond to different figure-eight pads 52. When the parameters (such as angle) of the wedges 51 change, the parameters (such as angle) of the figure-eight pads 52 can be adapted and adjusted accordingly. The above method can test the anti-diamond stiffness of different parameters of the wedges 51 of railway vehicle bogies under the condition that other conditions remain unchanged. It can analyze the combination of structural parameters that provide the maximum anti-diamond stiffness of the wedges 51, which plays a significant role in optimizing the overall structure of the bogie.

[0039] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for testing the anti-diamond stiffness of bogie wedges with different parameters, characterized in that, Includes the following steps: S1. Simulated side frame one and simulated side frame two are respectively set at both ends of the load-bearing beam. The lower end of simulated side frame one is fixed on the test bench base, and the lower end of simulated side frame two is movably set on the test bench base. S2. Simulated elastic elements are provided between the load-bearing beam and simulated side frame one, and between the load-bearing beam and simulated side frame two. One end of each simulated elastic element rests on simulated side frame one and simulated side frame two, while the other end contacts the load-bearing beam. A parameter simulation device for adjusting the bogie wedge parameters is installed inside the load-bearing beam. The parameter simulation device includes a wedge and a V-shaped pad. The wedge is symmetrically arranged on the load-bearing beam along its axial centerline. The supporting beam has a groove for a V-shaped pad, and the V-shaped pad is suspended in the groove of the supporting beam by bolts. One inclined surface of the V-shaped pad abuts against the inclined surface of the wedge, and the other inclined surface of the V-shaped pad abuts against the inclined surface of the inner wall of the groove of the supporting beam. The parameter simulation device also includes a secondary friction plate, which is installed on the inclined surface of the wedge near the V-shaped pad, and the inclined surface of the V-shaped pad near the wedge abuts against the secondary friction plate. S3. Apply a vertical load to the center of the load-bearing beam to simulate empty and loaded vehicles. Apply a horizontal load to one side of the simulated side frame box two. Measure and record the corresponding lateral forces under different displacements and calculate the anti-diamond stiffness. S4. Change to different parameter simulation devices, repeat step S3, measure and record the corresponding lateral forces under different displacements, and calculate the anti-diamond stiffness. S5. Repeat step S4 multiple times to calculate the average value of the anti-diamond stiffness.

2. The test method for the anti-diamond stiffness of bogie wedges with different parameters according to claim 1, characterized in that, In step S4, when changing different parameter simulation devices, the anti-diamond stiffness of different parameters is tested and compared by replacing the wedges with different apex angles and the corresponding figure-eight surface pads.

3. The test method for the anti-diamond stiffness of bogie wedges with different parameters according to claim 1, characterized in that, In step S4, when changing the simulation device with different parameters, the anti-diamond stiffness of different parameters is tested and compared by replacing the auxiliary friction plates with different friction coefficients.

4. The test method for the anti-diamond stiffness of bogie wedges with different parameters according to claim 1, characterized in that, In step S4, when changing to different parameter simulation devices, wedges with different apex angles and auxiliary friction plates with different friction coefficients are combined to achieve testing and comparison of anti-diamond stiffness with different parameters.

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