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Device and method for testing fatigue of wheel axle

A fatigue test and wheel axle technology, applied in the field of material performance testing and research, can solve the problems of high experimental cost, difficulty in accurately predicting the fatigue performance of wheels and axle products from material fatigue data, and difficulty in application

Inactive Publication Date: 2017-08-04
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the complex structure and shape of wheels and axles, it is difficult to accurately predict the fatigue performance of wheels and axles using material fatigue data. However, using full-scale wheels and axles to conduct research on the fatigue performance of wheels or axles on large test benches, the experimental data obtained are even more accurate. Accurate and closer to reality, but at the same time, its high experimental cost and long experimental period make it difficult to apply to the fatigue test of wheels and axles, life prediction and the guidance and development of new wheels. At present, this method is mainly used for the certification and assessment of wheel and axle products

Method used

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  • Device and method for testing fatigue of wheel axle
  • Device and method for testing fatigue of wheel axle

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0040] Example 1: Scaled wheel rolling contact fatigue test

[0041] This example illustrates the composition and application method of the device in conjunction with the rolling contact fatigue test of the scaled wheel. like figure 1 As shown, the device of this embodiment includes: a scale wheel 5, a track wheel 3, a rotary drive mechanism, a vertical loading system, a damping and braking mechanism 4 and a controller.

[0042] Scale wheel 5 and track wheel 3, in wheel-rail contact fatigue and friction-wear test, scale wheel 5 is used for simulating actual wheel, and track wheel 3 is used for simulating the actual track that actual wheel runs; Scale wheel 5 samples It is based on the actual wheel to be tested, and is made in proportion to the actual wheel. Generally, the scaled wheel 5 is required to maintain geometric similarity with the actual wheel except for its size; the track wheel is sampled from the actual track on which the actual wheel runs. , that is, the track w...

example 2

[0060] Example 2: Scaled axle cantilever rotational bending fatigue test

[0061] This example also provides a wheel axle fatigue test device, the test device except the parts described in Example 1, such as figure 2 As shown, it can further include: a scaled axle 14 and a simulated wheel 15 used in the axle fatigue test, the scaled axle 14 is sampled from the actual axle to be tested, and is made in proportion to the actual axle, and the simulated wheel 15 is used In simulating the effect of the wheel on the actual axle during actual operation; during the axle fatigue test, one end of the scaled axle 14 is connected with the rotary drive mechanism, and the other end is the loading end, which is connected with a loading end bearing 16; the vertical loading system is also used for A load is applied to the loading end of the scaled axle 14 through the loading bearing 16; the simulated wheel 15 is press-fitted and connected to the scaled axle 14, and the simulated wheel 15 press...

example 3

[0069] Example 3: Scaled wheel web fatigue test

[0070] This example also provides a wheel axle fatigue test device, which, in addition to the components described in examples 1 and 2, further includes: a scaled wheel and a simulated axle used in the wheel web fatigue test, the scaled wheel The spoke plate is sampled from the actual full-size wheel spoke plate and scaled with the actual wheel’s spoke plate. The simulated axle is used to simulate the effect of the axle on the actual wheel during actual operation; in the wheel spoke plate fatigue test , the structure of the device is roughly similar to that of Example 2, which can be referred to figure 2 As shown, one end of the simulated axle is connected to the rotary drive mechanism, and the other end is the loading end, which is connected to a bearing of the loading end; the vertical loading system is also used to apply load to the loading end of the simulated axle through the loading bearing; the scaled wheel pressure In...

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Abstract

The invention discloses a wheel axle fatigue test device and method. The wheel axle fatigue test device includes: a scaled wheel and a track wheel, respectively simulating the actual wheel and the actual track; Scaled and scaled, the track wheel is made of materials with the same composition, microstructure and mechanical properties as the actual track; the rotary drive mechanism drives one of the scale wheel and the track wheel; the vertical loading system applies force to the driven wheel The vertical load makes the tread of the scaled wheel contact the track wheel; the damping and braking mechanism applies torque to the driven wheel to simulate the friction and braking force between the actual running of the wheel and the actual track; the controller controls the rotation drive mechanism, vertical Loading mechanism and damping and braking mechanism.

Description

technical field [0001] The invention relates to the field of material performance testing and research, in particular to an axle fatigue testing device and method. Background technique [0002] With the development of high-speed railway transportation technology and heavy-duty technology, the requirements for the transportation safety and operation performance of railway trains are getting higher and higher, and wheels and axles are one of the important parts of railway locomotives, and their operation safety is directly related to the entire railway system. quality of operation and development. [0003] The axle system plays the role of power transmission, bearing and braking during the operation of the train, and is the most severe component of the train in high-speed operation. Due to severe service conditions such as alternating loads, friction, and wear, it is easy to cause fatigue cracking of wheels and axles during service. In order to evaluate the performance of whe...

Claims

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Application Information

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IPC IPC(8): G01M17/10G01M13/00G01N3/38
CPCG01M17/10G01M13/00G01N3/38G01N2203/0005G01N2203/005G01N2203/0073G01N2203/0258G01N2203/0266G01N2203/0282G01N2203/0676G01N2203/0682G01N2203/0688
Inventor 任学冲陈新高建雨
Owner UNIV OF SCI & TECH BEIJING
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