Test bed for brake noise of high-speed train brake disc

Abstract

The invention relates to a test bed for brake noise of a high-speed train brake disc. According to constitution of the test bed, an output shaft of a variable frequency motor on the left side of a base is connected with a brake shaft sequentially through an electromagnetic clutch, a fly wheel shaft and a torque sensor, the brake disc is connected with the right end of the brake shaft, and a fly wheel set is fixed to the fly wheel shaft; a sliding table capable of moving front and back is arranged on the right side of the base, an air cylinder is installed on the right side of the sliding table, an output shaft at the left end of the air cylinder is connected with a clamp for clamping a brake pad sequentially through a spring, a piezoelectric type one-way force sensor and a guide rod, and the middle of the guide rod is supported on the sliding table through a linear bearing; a three-dimensional acceleration sensor is installed on the side face of the clamp, the left face of the brake pad is opposite to the right face of the brake disc, the induction end of a sound sensor is located nearby the brake disc, and the variable frequency motor, the electromagnetic clutch and the air cylinder are electrically connected with a control system. The test bed can simulate the brake working condition of the high-speed train brake disc to carry out brake noise tests, find out the relationship among the brake working condition, brake materials and the brake noise and provide a test basis for reducing the brake noise of the high-speed train brake disc.

Description

technical field [0001] The invention belongs to the technical field of brake noise testing of high-speed train brake discs. Background technique [0002] When a high-speed train is braking, the relative rotation of the brake disc and the brake pad produces braking noise, which affects the comfort of passengers and generates noise pollution along the line. At present, noise pollution is mainly reduced by installing sound barriers along the line, and there are few ways to reduce noise by reducing noise sources. In order to reduce brake noise from the source, it is necessary to use special test equipment to test and analyze the relationship between the material, structure, interface characteristics, train speed, load and other factors of the brake disc and brake pad and the noise. Special test equipment for brake noise of train brake discs. Contents of the invention [0003] The purpose of the present invention is to provide a brake noise test bench for brake discs of high-...

AI Technical Summary

Problems solved by technology

[0002] When a high-speed train is braking, the relative rotation of the brake disc and the brake pad produces braking noise, which affects the comfort of passengers and generates noise pollution along the line.

At present, noise pollution is mainly reduced by installing sound barriers along the line, and there are few ways to reduce noise by reducing noise sources.

In order to reduce brake noise from the source, it is necessary to use special test equipment to test and analyze the relationship between the material, structure, interface characteristics, train speed, load and other factors of the brake disc and brake pad and the noise, but so far there is no high-speed brake noise. Special test equipment for brake noise of train brake discs

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