Railway train axle box bearing test torque test device

Abstract

The invention discloses a test torque test device for axle box bearing of a railway train, comprising a test bench and a base, a mandrel is rotatably arranged on the test bench, a test station for installing a bearing to be tested is formed between the test bench and the mandrel, an axial force loading platform for applying an axial force is arranged on both sides of the mandrel, at least two loading cylinders for applying an axial load are arranged between the base and the test bench, the tail of the loading cylinder is rotatably connected to the base, a swing rod is arranged at the output end of the loading cylinder, connecting rods are rotatably arranged at both ends of the swing rod, the other end of the connecting rod is rotatably connected to both sides of the test bench, and a load sensor is connected to the connecting rod. It has a simple structure, can perform torque test more accurately, reduce the influence of holding back force, and has a good use effect.

Description

Technical Field

[0001] The invention relates to a railway train axle box bearing test torque testing device. Background Art

[0002] Railway axle box bearings are important supporting bearings during train operation. Their torque performance is an important factor affecting the power of traction motors, and torque is closely related to heat generation. During the current torque detection device, due to the axial load test, the structure will deviate and swing, and there will be a sense of tension, which affects the detection reliability of the structure. In addition, during the test, it will be found that there is a difference in the test load when the core shaft is running and when it is stationary, which is not conducive to accurately obtaining the torque value and affects the use effect of the equipment. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a railway train axle box bearing test torque testing device, which has a simple structure, can perform torque testing more accurately, reduces the influence of holding force, and has a good use effect.

[0004] To achieve the above-mentioned purpose, the present invention provides a railway train axle box bearing test torque test device, including a test bench and a base, a core shaft is rotatably arranged on the test bench, a test station for installing a bearing to be tested is formed between the test bench and the core shaft, and the test bench is provided with axial force loading platforms for applying axial force on both sides of the core shaft, and two loading cylinders for applying radial loads are arranged between the base and the test bench, the tail of the loading cylinder is rotatably connected to the base, a swing rod is arranged at the output end of the loading cylinder, connecting rods are swingably arranged at both ends of the swing rod, and the other end of the connecting rod is rotatably connected to both sides of the test bench, and a load sensor is connected to the connecting rod.

[0005] The beneficial effect of such an arrangement is as follows: with such an arrangement, an axial load can be applied through the axial force loading platform to perform an axial load test, and a radial load can be further applied through the loading cylinder. Through this structure, the radial force pulls the test structure vertically downward so that the swing rod is in a horizontal state. Through the swing connection of the connecting rod and the rotation connection between the loading cylinder and the base, the test axle box bearing can be adaptively prevented from generating a tensile force under the action of load. Furthermore, when the core shaft does not rotate, the loads of the two high-precision load sensors are consistent. When the core shaft rotates, the torque generated by the test bearing will act on the high-precision load sensor to generate a difference between the two test torque sensors. The product of the difference and the lever arm is the test bearing torque. Since the axle box bearing test is divided into forward and reverse rotation conditions, the forward and reverse torque conditions can be recorded during the test, and the average value of the forward and reverse rotation or the average value of a certain period of forward transmission test can be used as the average value of the bearing, thereby reducing the test error. This detection is reliable, and the torque test can be performed more accurately, reducing the influence of tensile force, and has a good use effect.

[0006] As a further configuration of the present invention, a swing groove is provided on the base, and the tail of the loading cylinder is swingably connected in the swing groove through a first swing pin, and the first swing pin is provided through the base and the loading cylinder.

[0007] The beneficial effect of such arrangement is that such arrangement can effectively prevent the slight swing deformation caused by axial loading, can better adapt, and has good reliability in use.

[0008] As a further configuration of the present invention, a connecting platform is provided in the middle position of the swing rod, a connecting groove is provided on the output end of the loading cylinder, and the connecting platform is fixedly connected to the connecting groove via a plurality of screw rods.

[0009] The beneficial effect of such arrangement is that, when a radial load is applied, the swing arm is in a horizontal state, thus ensuring the accuracy of the structural test. Meanwhile, the structure is simple, easy to implement, and has a good use effect.

[0010] As a further configuration of the present invention, the screw rods are arranged along the circumference of the connecting platform.

[0011] The beneficial effect of such arrangement is that such arrangement further improves the reliability of the connection, has a good use effect, and at the same time has a simple structure and is easy to implement.

[0012] As a further configuration of the present invention, a displacement sensor is provided on the outer wall of the loading cylinder, and a test end of the displacement sensor is connected to an output end of the loading cylinder.

[0013] The beneficial effect of such arrangement is that such arrangement can monitor the loading condition of radial load, avoid overloading, ensure the stability of structure use, and at the same time, the structure is simple, ensure the safety of structure use, and have good use effect.

[0014] As a further configuration of the present invention, a fixed bearing seat is further provided on the test bench at a position corresponding to the core shaft, and a companion bearing is provided between the fixed bearing seat and the core shaft.

[0015] The beneficial effect of such arrangement is that such arrangement ensures the stable operation of the mandrel, and at the same time, the structure is simple, easy to implement, and has good stability in use.

[0016] As a further configuration of the present invention, a driving platform for connecting the multi-V belt is provided at the middle of the core shaft, and two sides of the driving platform are smoothly connected to two sides of the core shaft.

[0017] The beneficial effects of such arrangement are: such arrangement facilitates the connection of the multi-V belt, ensures the driving effect, has a good use effect, and at the same time has a simple structure and ensures the reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the embodiment of the present invention is schematically shown;

[0019] Figure 2 is a schematic diagram of a cross-sectional structure along the axial direction of an embodiment of the present invention;

[0020] Figure 3 It is a side view structural schematic diagram of an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure along the radial direction of an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention provides an embodiment of a railway train axle box bearing test torque test device, such as Figures 1 to 4 As shown, it includes a test bench 1 and a base 3, a core shaft 2 is rotatably arranged on the test bench 1, a test station for installing a bearing to be tested is formed between the test bench 1 and the core shaft 2, the test bench 1 is provided with axial force loading platforms 11 for applying axial force on both sides of the core shaft 2, two loading cylinders 4 for applying radial loads are arranged between the base 3 and the test bench 1, the tail of the loading cylinder 4 is rotatably connected to the base 3, a swing rod 5 is arranged at the output end of the loading cylinder 4, connecting rods 51 are swingably arranged at both ends of the swing rod 5, the other end of the connecting rod 51 is rotatably connected to both sides of the test bench 1, and a load sensor is connected to the connecting rod 51. The beneficial effect of such arrangement is as follows: with such arrangement, an axial load can be applied through the axial force loading platform 11, thereby performing an axial load test, and a radial load can be further applied through the loading cylinder 4. Through this structure, the radial force pulls the test structure vertically downward so that the swing rod 5 is in a horizontal state. Through the swing connection of the connecting rod 51 and the rotational connection between the loading cylinder 4 and the base 3, the test axle box bearing can be adaptively prevented from generating a stiffness under the action of load. Furthermore, when the core shaft 2 does not rotate, the loads of the two high-precision load sensors are consistent. When the core shaft 2 rotates, the torque generated by the test bearing will act on the high-precision load sensor so that the two test torque sensors produce a difference. The product of the difference and the lever arm is the test bearing torque. Since the axle box bearing test is divided into forward and reverse rotation conditions, the forward and reverse torque conditions can be recorded during the test, and the average value of the forward and reverse rotation or the average value of a certain period of forward transmission test can also be used as the average value of the bearing, thereby reducing the test error. This detection is reliable, and the torque test can be performed more accurately, reducing the influence of stiffness, and has a good use effect.

[0023] As a further configuration of this embodiment, a swing groove is provided on the base 3, and the tail of the loading cylinder 4 is swingably connected in the swing groove through a first swing pin 31, and the first swing pin 31 is provided through the base 3 and the loading cylinder 4. The beneficial effect of this configuration is that it can effectively prevent the micro-swing deformation caused by axial loading, can better adapt, and has good reliability in use.

[0024] As a further configuration of this embodiment, a connecting platform 52 is provided in the middle of the swing rod 5, a connecting groove is provided on the output end of the loading cylinder 4, and the connecting platform 52 is fixedly connected to the connecting groove through a plurality of screws. The beneficial effect of this configuration is that when a radial load is applied, the swing rod 5 is in a horizontal state, ensuring the accuracy of the structural test, and at the same time, the structure is simple, easy to implement, and has a good use effect.

[0025] As a further configuration of this embodiment, the screw rods are arranged along the circumference of the connection platform 52. The beneficial effect of this configuration is that the reliability of the connection is further improved, and the use effect is good. At the same time, the structure is simple and easy to implement.

[0026] As a further configuration of this embodiment, a displacement sensor 41 is provided on the outer wall of the loading cylinder 4, and a test end of the displacement sensor 41 is connected to the output end of the loading cylinder 4. The beneficial effect of this configuration is that the radial load loading can be monitored, overloading can be avoided, and the stability of the structure can be ensured. At the same time, the structure is simple, the safety of the structure can be ensured, and good use effect can be achieved.

[0027] As a further configuration of this embodiment, a fixed bearing seat 12 is further provided on the test bench 1 at a position corresponding to the mandrel 2, and a companion bearing is provided between the fixed bearing seat 12 and the mandrel 2. The beneficial effect of such configuration is that such configuration ensures stable operation of the mandrel 2, and at the same time, the structure is simple, easy to implement, and has good stability in use.

[0028] As a further configuration of this embodiment, a driving platform 21 for connecting a multi-V belt is provided in the middle of the mandrel 2, and both sides of the driving platform 21 are smoothly connected to both sides of the mandrel 2. The beneficial effects of this configuration are: this configuration facilitates the connection of the multi-V belt, ensures the driving effect, has a good use effect, and has a simple structure, ensuring the reliability of use.

[0029] The above example is only one of the preferred specific examples of the present invention. The common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A test torque test device for a railway train axle box bearing, comprising a test bench and a base, wherein a core shaft is rotatably arranged on the test bench, a test station for mounting a bearing to be tested is formed between the test bench and the core shaft, and an axial force loading platform for applying an axial force is arranged on both sides of the core shaft of the test bench, characterized in that: Two loading cylinders for applying radial loads are arranged between the base and the test bench. The tail of the loading cylinder is rotatably connected to the base. A swing rod is arranged at the output end of the loading cylinder. Connecting rods are swingably arranged at both ends of the swing rod. The other end of the connecting rod is rotatably connected to both sides of the test bench. A load sensor is connected to the connecting rod. When the core shaft does not rotate, the loads of the two high-precision load sensors are consistent. When the core shaft rotates, the torque generated by the test bearing will act on the high-precision load sensor, causing a difference between the two test torque sensors. The product of the difference and the lever arm is the test bearing torque.

2. The railway train axle box bearing test torque test device according to claim 1, characterized in that: The base is provided with a swing groove, and the tail of the loading cylinder is swingably connected in the swing groove through a first swing pin, and the first swing pin is arranged through the base and the loading cylinder.

3. The railway train axle box bearing test torque test device according to claim 1, characterized in that: A connecting platform is arranged in the middle of the swing rod, a connecting groove is arranged on the output end of the loading cylinder, and the connecting platform is fixedly connected to the connecting groove through a plurality of screw rods.

4. The railway train axle box bearing test torque test device according to claim 3, characterized in that: The screw rods are arranged along the circumference of the connecting platform.

5. The railway train axle box bearing test torque test device according to claim 1, characterized in that: A displacement sensor is provided on the outer wall of the loading cylinder, and a testing end of the displacement sensor is connected to an output end of the loading cylinder.

6. The railway train axle box bearing test torque test device according to claim 1, characterized in that: A fixed bearing seat is also arranged on the test bench at a position corresponding to the core shaft, and a companion bearing is arranged between the fixed bearing seat and the core shaft.

7. The railway train axle box bearing test torque test device according to claim 1, characterized in that: A driving platform for connecting a multi-V belt is arranged at the middle of the core shaft, and two sides of the driving platform are smoothly connected to two sides of the core shaft.

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