Fretting fatigue test bench for axle of high-speed motor train unit

Abstract

The utility model discloses a high-speed motor train unit axle fretting fatigue test bench, which comprises an installation platform and a fixed box body, the fixed box body is arranged at one end of the installation platform, a main shaft support is arranged on the corresponding side of the fixed box body, a coaxial motor is arranged on the main shaft support, and the coaxial motor is arranged on the fixed box body. An actuator support is arranged at the other end of the mounting platform, and an actuator body is arranged on the actuator support. The utility model relates to the technical field of axle fatigue test, in particular to an axle fretting fatigue test bench for a high-speed motor train unit, which aims at solving the problem that axle fatigue test equipment for the high-speed motor train unit at the present stage is not provided with a temperature and humidity control device. The temperature and humidity of the space close to the test axle can be adjusted through the closed sleeve shell, the temperature and humidity control assembly is movably installed, the structure is simple, disassembly and assembly are convenient, and corresponding test operation can be carried out closer to the test axle.

Description

Technical Field

[0001] This utility model relates to the field of wheel and axle fatigue testing technology, specifically a high-speed train wheel and axle micro-motion fatigue testing bench. Background Technology

[0002] The wheel and axle fretting fatigue test bench is a device specifically designed to test the fatigue and fretting fatigue experienced by wheel and axle of high-speed trains during operation. It determines the fatigue performance of wheel and axle by simulating wheel and axle fatigue and fretting fatigue conditions under different load conditions.

[0003] Current wheel and axle fretting fatigue testing benches, whether cantilever beam or simply supported beam type, primarily focus on the fretting fatigue caused by the operating load and cyclic motion of high-speed train wheel and axles. However, ambient temperature and humidity are also common influencing factors on the fretting fatigue of high-speed train wheel and axles. Unfortunately, current fretting fatigue testing benches lack ambient temperature and humidity control devices, necessitating the use of external equipment for this purpose. This increases management costs, as well as the space and equipment costs associated with the equipment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model aims to provide a high-speed train wheel axle micro-motion fatigue test bench, which adds environmental temperature and humidity control functions, and has a simple structure that is easy to disassemble and assemble.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a high-speed train wheel axle micro-motion fatigue test bench, including an installation platform and a fixed box, the fixed box is set on one end of the installation platform, a main shaft support is set on the corresponding side of the fixed box, a coaxial motor is set on the main shaft support, an actuator support is set on the other end of the installation platform, and an actuator body is set on the actuator support;

[0006] The installation platform is equipped with a temperature and humidity control component.

[0007] The temperature and humidity control component includes a rotating groove on one side of the installation platform, a rotating rod mounted on the rotating groove, a closed sleeve fitted on the rotating rod, and at least one locking device at one end of the closed sleeve that is connected and locked to the other side of the installation platform.

[0008] The temperature and humidity control component also includes a control channel located on the upper part of the enclosed housing, a control fan located on the control channel, and a humidity regulator located on one side of the control fan.

[0009] The temperature and humidity control component also includes a pair of control slots symmetrically opened inside the closed housing, a pair of mounting plates are provided on the pair of control slots, and a pair of electric heaters composed of resistance wires are installed on the pair of mounting plates.

[0010] Preferably, the pair of control slots are rectangular grooves, and the pair of mounting plates are mounted on the pair of control slots by bolts.

[0011] Preferably, the enclosed shell is a rectangular shell with an air groove in the middle, and the bottom of the air groove penetrates the bottom surface of the enclosed shell.

[0012] Preferably, the locker consists of a locking sleeve installed at one end of the closed housing, a locking tube installed on one side of the installation platform, and a locking shaft axially connecting the locking sleeve and the locking tube.

[0013] Preferably, the humidity regulator includes at least one pair of adjustment slots disposed on one side of the control channel, wherein a humidity control board is inserted into the adjustment slots and the humidity control board corresponds to the air outlet of the control fan.

[0014] The present invention has the following advantages: The high-speed train wheel axle micro-motion fatigue test bench has a rotating closed shell on the installation platform. The temperature and humidity of the space near the test axle can be adjusted through the closed shell. The temperature and humidity control components are installed in a movable manner, which not only makes the structure simple and easy to disassemble and assemble, but also allows for closer testing operations to the test axle. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a partial perspective view of the present invention.

[0017] Figure 3 This is a partial sectional view of the present invention.

[0018] In the diagram: 1. Mounting platform; 2. Fixed housing; 3. Spindle support; 4. Coaxial motor; 5. Actuator support; 6. Actuator body; 7. Temperature and humidity control components; 71. Enclosed housing; 72. Electric heater; 73. Mounting plate; 74. Locking device; 75. Control channel; 76. Control fan; 77. Humidity regulator; 771. Adjustment slot; 772. Humidity control board. Detailed Implementation

[0019] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1-3 A high-speed train wheel axle micro-motion fatigue test bench includes an installation platform 1 and a fixed housing 2. The fixed housing 2 is set on one end of the installation platform 1, and a main shaft support 3 is set on the corresponding side of the fixed housing 2. A coaxial motor 4 is set on the main shaft support 3. An actuator support 5 is set on the other end of the installation platform 1, and an actuator body 6 is set on the actuator support 5.

[0021] Specifically, referring to the working principle disclosed in CN105806617B, a coaxial motor 4 is fixedly connected to a rectangular mounting platform 1 in the high-speed train wheel axle fatigue test bench. The control system controls the coaxial motor 4 to rotate and drive the test axle to rotate at the test speed. At the same time, the actuator body 6 is fixedly connected to the actuator support 5 and drives the intermediate transition piston to move through its back and forth movement. The hydraulic oil following the hydraulic cylinder moves with the movement of the intermediate transition piston, and repeats the cycle to simulate the centrifugal force experienced by the wheel axle during operation.

[0022] In order to conduct fretting fatigue tests on wheel axles under different temperature and humidity environments, a temperature and humidity control component 7 is installed on the mounting platform 1 to control the space where the wheel axle is located to be under different temperature and humidity conditions.

[0023] Specifically, the temperature and humidity control component 7 includes a rotating groove, which is located on one side of the mounting platform 1. A rotating rod is mounted on the rotating groove, and a closed sleeve 71 is fitted on the rotating rod. At least one locking device 74 is provided at one end of the closed sleeve 71 and is connected and locked to the other side of the mounting platform 1.

[0024] The temperature and humidity control component 7 also includes a control channel 75, which is located on the upper part of the enclosed housing 71. A control fan 76 is installed on the control channel 75, and a humidity regulator 77 is installed on one side of the control fan 76.

[0025] The temperature and humidity control component 7 also includes a pair of control slots, which are symmetrically arranged on both sides inside the enclosed housing 71. A pair of mounting plates 73 are provided on the pair of control slots, and a pair of electric heaters 72 composed of resistance wires are installed on the pair of mounting plates 73.

[0026] In the specific implementation process, the rotating rod on the rotating groove serves as the installation position of the closed casing 71. The closed casing 71 can rotate on the rotating rod, and the upper space of the installation platform 1 can be opened by rotating the closed casing 71, thereby completing the disassembly and assembly of the test vehicle axle. A pair of mounting plates 73 can be installed through a pair of control grooves on both sides of the closed casing 71. At the same time, a pair of electric heaters 72 on the pair of mounting plates 73 are used to regulate the temperature inside the closed casing 71. When humidity regulation is required, the control channel 75 on the closed casing 71 serves as an air flow channel, and the control fan 76 blows air into the closed casing 71. The humidity is controlled by the humidity regulator 77 at the tail end of the closed casing 71.

[0027] Furthermore, the pair of control slots are rectangular grooves, and the pair of mounting plates 73 are bolted to the pair of control slots, which facilitates disassembly and maintenance of the electric heater 72.

[0028] Furthermore, the enclosed shell is a rectangular structure with an air vent in the middle, the bottom of which extends through the bottom surface of the enclosed shell.

[0029] Furthermore, the locking device 74 consists of a locking sleeve installed at one end of the closed housing 71, a locking tube installed on one side of the mounting platform 1, and a locking shaft axially connecting the locking sleeve and the locking tube. When the closed housing 71 is kept horizontal, the locking sleeve and the locking tube are axially aligned, and the locking shaft is inserted into the locking sleeve and the locking tube to limit the movement of the closed housing 71.

[0030] Furthermore, the humidity regulator 77 includes at least one pair of adjustment slots 771, which are located on one side of the control channel 75. A humidity control board 772 is inserted into the adjustment slot 771, and the humidity control board 772 corresponds to the air outlet of the control fan 76.

[0031] In the specific implementation process, the adjustment slot 771 is a rectangular groove. The adjustment slot 771 is connected to the control channel 75. The depth of the humidity control plate 772 inserted into the adjustment slot 771 changes the amount of contact between the humidity-affecting substance on the humidity control plate 772 and the air. At least one pair of adjustment slots 771 are provided at the end of the control channel 75. A pair of humidity control plates 772 are provided using the pair of adjustment slots 771. Water-absorbing cotton with sufficient moisture and desiccant are placed on the pair of humidity control plates 772 respectively. When the air generated by the fan 76 passes through the humidity control plate 772 with water-absorbing cotton, the air humidity will increase. When it is necessary to reduce the humidity, the humidity control plate 772 with water-absorbing cotton is pulled out and the humidity control plate 772 with desiccant is inserted into the adjustment slot 771.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed train wheel axle micro-motion fatigue test bench, comprising an installation platform (1) and a fixed housing (2), wherein the fixed housing (2) is disposed on one end of the installation platform (1), and a main shaft support (3) is disposed on the corresponding side of the fixed housing (2), and a coaxial motor (4) is disposed on the main shaft support (3), characterized in that, An actuator support (5) is provided at the other end of the installation platform (1), and an actuator body (6) is provided on the actuator support (5). The installation platform (1) is equipped with a temperature and humidity control component (7); The temperature and humidity control component (7) includes a rotating groove on one side of the installation platform (1), a rotating rod is mounted on the rotating groove, a closed sleeve (71) is fitted on the rotating rod, and at least one locking device (74) is provided at one end of the closed sleeve (71) to be connected and locked to the other side of the installation platform (1). The temperature and humidity control component (7) also includes a control channel (75) disposed on the upper part of the enclosed housing (71), a control fan (76) is disposed on the control channel (75), and a humidity regulator (77) is disposed on one side of the control fan (76). The temperature and humidity control component (7) also includes a pair of control slots symmetrically opened inside the closed housing (71), a pair of mounting plates (73) are provided on the pair of control slots, and a pair of electric heaters (72) composed of resistance wires are installed on the pair of mounting plates (73).

2. The high-speed train wheel and axle fretting fatigue test bench according to claim 1, characterized in that, The pair of control slots are rectangular grooves, and the pair of mounting plates (73) are mounted on the pair of control slots by bolts.

3. The high-speed train wheel axle fretting fatigue test bench according to claim 1, characterized in that, The enclosed shell is a rectangular shell with an air groove in the middle, and the bottom of the air groove extends through the bottom surface of the enclosed shell.

4. The high-speed train wheel axle fretting fatigue test bench according to claim 1, characterized in that, The locker (74) consists of a locking sleeve installed at one end of the closed housing (71), a locking tube installed on one side of the mounting platform (1), and a locking shaft that axially connects the locking sleeve and the locking tube.

5. The high-speed train wheel axle fretting fatigue test bench according to claim 1, characterized in that, The humidity regulator (77) includes at least one pair of adjustment slots (771) disposed on one side of the control channel (75), wherein a humidity control board (772) is inserted into the adjustment slot (771), and the humidity control board (772) corresponds to the air outlet of the control fan (76).

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