Steel rail and train wheel rolling contact fatigue test sample and fixing device

Abstract

The utility model discloses a steel rail and train wheel rolling contact fatigue test sample and a fixing device, which comprises a train test ring key pin bolt fixing structure and a steel rail test ring key pin bolt fixing structure, the train test ring key pin bolt fixing structure comprises an upper wheel mechanism A, and a key pin A is arranged on the right side of the upper wheel mechanism A. Sampling positions and sizes are designed on a steel rail and a wheel, a large number of tests and arguments are carried out, a rolling friction wear test can simulate a wheel-rail contact scene as much as possible, a key pin type fixing method is adopted according to the sample size design of the steel rail and the wheel, reasonable key pins are designed on a driving wheel and a driven wheel, and the test accuracy is improved. A steel rail and a wheel sample are slotted, a wheel, a steel rail test ring and a key pin are tightly fixed on a driving shaft and a driven shaft of a rolling contact fatigue testing machine, the test can be started, and after the test, the abrasion loss, abrasion morphology, hardness and the like of the steel rail sample can be detected so as to reflect the rolling contact fatigue performance of the steel rail and the wheel.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail and train technical field, concretely is a kind of rail and train wheel rolling contact fatigue test sample and fixing device. BACKGROUND

[0002] Rail and train wheel rolling contact fatigue has become a big problem to affect the efficiency and economic efficiency of railway transportation.Rail-Train wheel rolling contact fatigue has various failure forms, therefore, strengthening the research on the formation mechanism of rail rolling contact fatigue, effectively preventing or slowing down the damage of rail rolling contact fatigue, has very important social significance and economic significance.

[0003] At present, rail rolling contact fatigue test is mainly carried out through rolling friction and wear testing machine, and the rolling contact fatigue wear characteristics of rails and wheels of different materials in wheel-rail contact process are studied by setting test parameters such as load and vehicle speed.Application No.CN201822115901.1 discloses a double-drive wheel-rail physical rolling contact fatigue testing machine, which can simulate the actual stress state in the application of rail, so as to obtain real data of rail base material fatigue performance, but the above design still has deficiencies, the device has the problem of single function, and the size of rail and the experimental process are not accurately described, and the rail cannot be dusted during the work of the fatigue testing machine.

[0004] Although the research on rail rolling contact fatigue has achieved certain results, there are still many challenges, for example, how to select suitable rail and train materials for experiment according to line, which requires a lot of authenticity of experimental results, whether the sampling method of rail and wheel and the size of test sample can truly simulate the wheel-rail contact scene, and there is less research on designing stable fixing method to improve the stability of experiment, therefore, the utility provides a rail and train wheel rolling contact fatigue test sample and fixing device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a rail and train wheel rolling contact fatigue test sample and fixing device to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a rail and train wheel rolling contact fatigue test sample and fixing device, which comprises train test ring key pin bolt fixing structure and rail test ring key pin bolt fixing structure, the train test ring key pin bolt fixing structure comprises upper wheel mechanism A, the right side of upper wheel mechanism A is provided with key pin A, rail test ring A is installed on upper wheel mechanism A, and key pin slot A is formed in rail test ring A, the key pin slot A is connected with key pin A, and the gasket A installed on upper wheel mechanism A is located at the right end of rail test ring A.

[0007] The rail test ring key pin bolt fixing structure comprises an upper wheel mechanism B, a key pin B is arranged at the left end of the upper wheel mechanism B, a rail test ring B is arranged on the upper wheel mechanism B, the key pin B arranged in the inner side of the rail test ring B is connected with a key pin groove B, and the bolt B arranged on the upper wheel mechanism B is located at the left end of the rail test ring B.

[0008] Preferably, as one preferred embodiment of the utility model, the gasket A sleeved on the right side of the upper wheel mechanism A is located between the rail test ring A and the bolt A.

[0009] Preferably, as one preferred embodiment of the utility model, the gasket B sleeved on the left side of the upper wheel mechanism B is located between the rail test ring B and the bolt B.

[0010] Preferably, as one preferred embodiment of the utility model, the rail test ring A is provided with a connecting edge of integral structure, and the rail test ring A is connected to the rail test ring B through the connecting edge.

[0011] Preferably, as one preferred embodiment of the utility model, the rail test ring A and the rail test ring B have equal width.

[0012] Compared with the prior art, the utility model has the beneficial effects that: the sampling position and size are designed on the rail and the wheel, a large number of tests and demonstrations are made in the patent, so that the rolling friction and wear test can simulate the wheel-rail contact scene as much as possible, the key pin type fixing method is adopted according to the sample size of the rail and the wheel, the reasonable key pin is designed on the driving wheel and the driven wheel, the groove is opened on the rail and the wheel sample, the wheel, the rail test ring and the key pin are tightly fixed on the driving shaft and the driven shaft of the rolling contact fatigue testing machine, and then the test can be started, and after the test, the abrasion amount, the abrasion appearance and the hardness of the rail sample can be detected to reflect the rolling contact fatigue performance of the rail and the wheel. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is an exploded structural schematic view of the train test ring key pin bolt fixing device and the rail test ring key pin bolt fixing device.

[0014] Fig. 2 It is a connection structural schematic view of the train test ring key pin bolt fixing device and the rail test ring key pin bolt fixing device.

[0015] In the figure: 1, train test ring key pin bolt fixing structure; 101, upper wheel mechanism A; 102, key pin A; 103, key pin groove A; 104, rail test ring A; 105, gasket A; 106, bolt A; 2, rail test ring key pin bolt fixing structure; 201, upper wheel mechanism B; 202, key pin B; 203, key pin groove B; 204, rail test ring B; 205, gasket B; 206, bolt B. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0017] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, in the description of the utility model, in addition, "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0018] In the description of the utility model, it should be further pointed out that, unless otherwise explicitly specified and limited, the terms "provision", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The meaning of "multiple" is two or more than two, unless otherwise specifically limited, all belong to the scope of protection of the utility model.

[0019] Example: as Figs. 1-2The utility model provides a technical scheme: including train test ring key pin bolt fixed structure 1 and rail test ring key pin bolt fixed structure 2, train test ring key pin bolt fixed structure 1 includes the upper wheel mechanism A101, is equipped with the key pin A102 on the right side of upper wheel mechanism A101, is installed with rail test ring A104 on upper wheel mechanism A101, and the key pin slot A103 is seted up on rail test ring A104, and the key pin slot A103 is connected with key pin A102, and the gasket A105 of installation on upper wheel mechanism A101 is at the right end of rail test ring A104,

[0020] Rail test ring key pin bolt fixed structure 2 includes upper wheel mechanism B201, and the left end of upper wheel mechanism B201 is equipped with key pin B202, and upper wheel mechanism B201 is installed with rail test ring B204, and the key pin B202 of inside of rail test ring B204 is connected with key pin slot B203, and the gasket B205 of installation on upper wheel mechanism B201 is at the left end of rail test ring B204, and the bolt B206 of installation on upper wheel mechanism B201 is at the left end of rail test ring B204.

[0021] The gasket A105 of sleeveing on the right side of upper wheel mechanism A101 is between rail test ring A104 and bolt A106.

[0022] The gasket B205 of sleeveing on the left side of upper wheel mechanism B201 is between rail test ring B204 and bolt B206.

[0023] Rail test ring A104 is equipped with the connecting edge of integral structure, and rail test ring A104 is connected to rail test ring B204 through the connecting edge.

[0024] Rail test ring A104 and rail test ring B204 are equal in width.

[0025] Design sampling position and size on rail and wheel, the patent has made a lot of tests and demonstration, so that the rolling friction and wear test can simulate the scene of wheel-rail contact as far as possible, according to the sample size of rail and wheel, adopt the key pin type fixing method, design reasonable key pin on driving wheel and driven wheel, and groove on rail and wheel sample, tightly fix wheel, rail test ring and key pin on driving and driven shaft of rolling contact fatigue testing machine, then start test, after test, can detect the abrasion amount, abrasion appearance, hardness of rail sample, to reflect the rolling contact fatigue performance of rail and wheel.

[0026] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A rolling contact fatigue test specimen and fixing device for rails and train wheels, comprising a train test ring key bolt fixing structure (1) and a rail test ring key bolt fixing structure (2), characterized in that, The train test ring key bolt fixing structure (1) includes an upper wheel mechanism A (101), a key pin A (102) is provided on the right side of the upper wheel mechanism A (101), a rail test ring A (104) is installed on the upper wheel mechanism A (101), and a key pin groove A (103) is opened on the rail test ring A (104), the key pin groove A (103) is connected to the key pin A (102), and a shim A (105) installed on the upper wheel mechanism A (101) is located at the right end of the rail test ring A (104); The rail test ring key bolt fixing structure (2) includes an upper wheel mechanism B (201), a key pin B (202) is provided at the left end of the upper wheel mechanism B (201), a rail test ring B (204) is installed on the upper wheel mechanism B (201), the key pin B (202) opened on the inner side of the rail test ring B (204) is connected to the key pin groove B (203), the shim B (205) installed on the upper wheel mechanism B (201) is located at the left end of the rail test ring B (204), and the bolt B (206) installed on the upper wheel mechanism B (201) is located at the left end of the rail test ring B (204).

2. The rolling contact fatigue test specimen and fixing device for rails and train wheels according to claim 1, characterized in that: The shim A (105) fitted on the right side of the upper wheel mechanism A (101) is located between the rail test ring A (104) and the bolt A (106).

3. The rolling contact fatigue test specimen and fixing device for rails and train wheels according to claim 1, characterized in that: The shim B (205) fitted on the left side of the upper wheel mechanism B (201) is located between the rail test ring B (204) and the bolt B (206).

4. The rolling contact fatigue test specimen and fixing device for rails and train wheels according to claim 1, characterized in that: The rail test ring A (104) is provided with an integral connecting edge, and the rail test ring A (104) is connected to the rail test ring B (204) through the connecting edge.

5. The rolling contact fatigue test specimen and fixing device for rails and train wheels according to claim 1, characterized in that: The widths of the rail test ring A (104) and the rail test ring B (204) are equal.

Images