Pure electric control tread type electromagnetic brake for railway vehicle braking system

Abstract

A pure electric control tread type electromagnetic brake for a railway vehicle braking system comprises a connecting rod and a brake head connected with one end of the connecting rod, and the other end of the connecting rod is connected with an electromagnetic driving mechanism. The electronic brake control unit receives an instruction of the train control unit and calculates exciting current required by each basic brake device so as to output a control signal of an electromagnet; an electromagnet in the electromagnetic brake acts according to a control signal to push a brake head to move, positive pressure is generated on a wheel pair tread and converted into wheel rail friction force, and the purpose of speed reduction or parking is achieved. Braking force transmission does not need a propagation medium, and the consistency and synchronization performance of braking force application of all vehicles are better. The system process is simple, pipeline connection does not need to be considered, the process requirement is lower, sealing performance does not need to be considered, and therefore the maintenance cost is low. And the novel electromagnetic brake is simple in connection, can implement the braking function only through hard wire connection, and has important significance for shortening the design, production and manufacturing periods of the vehicle.

Description

technical field [0001] The invention relates to rail transit brake system technology, in particular to a novel purely electronically controlled tread type electromagnetic brake for rail transit vehicles. Background technique [0002] The friction braking of traditional rail transit vehicles generally uses compressed air or hydraulic devices as the power source, and adopts pad brakes, disc brakes or track electromagnetic brakes to convert the kinetic energy of the train into heat energy to achieve deceleration or deceleration of the train. Purpose of parking. [0003] The train adopts compressed air (or hydraulic device) as the power source scheme of the braking system, which needs to be equipped with an air compressor module (or hydraulic pump), air cylinder (or hydraulic energy storage tank), air processing module, and air circuit (hydraulic) control conversion Components, piping, etc. This scheme has the following disadvantages [0004] 1. Low control precision and slow...

AI Technical Summary

Problems solved by technology

Therefore, the control accuracy is poor and the control hysteresis

[0006] 2. High requirements on medium quality

If the cleanliness and humidity are not properly controlled, it may also lead to system failure, which may lead to serious consequences

At the same time, the processing accuracy of pneumatic components, production environment and other factors have strict requirements, which increase production and maintenance costs

[0008] 2) Hydraulic components have high requirements on the hydraulic medium (hydraulic oil). If there are air bubbles, moisture or other impurities in the hydraulic medium, it will seriously affect the system performance and even lead to serious consequences.

[0009] 3. There are many devices and complex systems

[0011] 4. Increase the weight of the train and affect the axle load of the vehicle

[0012] Due to the large number of equipment (or components), the mass and volume of the equipment are large, increasing the sprung mass and intersprung mass of the train is not conducive to improving the dynamic performance of the train

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