Rail transit vehicle brake shoe remaining life evaluation method
A technology for rail transit vehicles and life assessment, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of inability to dynamically grasp the thickness of the brake shoe, high cost, and achieve the effect of improving the ability to ensure operational safety.
Pending Publication Date: 2022-02-11
ZHUZHOU ELECTRIC LOCOMOTIVE CO
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Problems solved by technology
[0007] The purpose of the present invention is to reasonably and efficiently evaluate the remaining life of the brake shoe of rail transit vehicles, instead of judging the remaining life of the brake shoe based on the designed service life, and to solve the cost of the existing regular manual method of measuring the thickness of the brake shoe High and the disadvantages of being unable to dynamically grasp the thickness of the brake shoe, realize the health management and fault prediction of the basic air brake device of the rail transit vehicle, and improve the operation safety guarantee capability of the braking system of the rail transit vehicle
Method used
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Embodiment Construction
[0048] Such as figure 1 As shown, a method for evaluating the remaining life of a rail vehicle brake shoe includes the following steps:
[0049] A1: Calculate the total force exerted by the brake cylinder of the bogie on the brake shoe group within a unit period. The brake shoe group is composed of 4 brake shoes, and the total force of the 4 brake shoes is formed by the pressure of the brake cylinder of the bogie. The first-order functional relationship, the specific functional relationship is as follows:
[0050] f i =k×X i -b(X i >X t )
[0051] Among them, F i is the total force of the brake shoe group, X i is the brake cylinder pressure of the bogie, k is the conversion coefficient of the brake cylinder pressure, b is the conversion coefficient of the braking force, X t In order to be able to push the brake shoe group to the threshold value of the tread, the threshold value, the brake cylinder pressure conversion coefficient and the braking force conversion coeffic...
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The invention discloses a rail transit vehicle brake shoe remaining life evaluation method and device. The method comprises the following steps: calculating the total acting force applied to a brake shoe group by a bogie brake cylinder in a unit period, and calculating the friction power applied to the brake shoe group of the bogie in the unit period according to the total acting force, calculating the energy acting on the brake shoe group in a unit period, accumulating the energy in a historical period, calculating the total brake energy acting on the brake shoe group by a bogie brake cylinder, calculating the current wear loss evaluation value of each brake shoe according to the wear loss of the brake shoe in unit energy and the total brake energy, and calculating the residual life of the brake shoe; a device corresponding to the method comprises a processor and a rail transit vehicle brake shoe remaining life evaluation program, and the processor executes the rail transit vehicle brake shoe remaining life evaluation program to achieve the rail transit vehicle brake shoe remaining life evaluation method. Therefore, the residual life of the brake shoe of the rail transit vehicle is reasonably and efficiently evaluated.
Description
technical field [0001] The invention relates to a rail transit vehicle, in particular to a method for evaluating the remaining life of a brake shoe of a rail transit vehicle. Background technique [0002] Friction braking of rail transit vehicles is also called air braking. According to the braking method, it can be divided into tread braking and disc braking. The former is generally used for vehicles with lower speed grades, and the latter is generally used for vehicles with higher speeds. The tread brake is also called brake shoe brake. The air brake system mainly includes several parts such as air supply system, brake control device and foundation brake device. Brake shoes are part of the basic brake system. Friction braking uses brake cylinder pressure to push the brake shoes against the tread, creating braking force. Brake shoes are usually made of synthetic materials with a high friction coefficient, such as cast iron brake shoes, synthetic brake shoes, powder metal...
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IPC IPC(8): G06F30/15G06F119/04G06F119/14
CPCG06F30/15G06F2119/04G06F2119/14
Inventor 李翀蒋子阳喻乐平彭冬良张杨段旭良李伟
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO
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