Electric braking system of railway vehicle

Abstract

The invention discloses an electric brake system of a railway vehicle. The electric brake system comprises a motor controller, a brake motor, an oil pump, a brake cylinder and brake calipers, the motor controller is in signal control connection with the brake motor, the brake motor is in drive connection with the oil pump, the oil pump is in oil supply connection with the brake cylinder through the one-way valve, the brake cylinder is in drive connection with the brake calipers, and the brake calipers are in brake connection with a wheel axle of the railway vehicle. The wheel shafts of the railway vehicle are braked through the brake calipers, so that additional abrasion caused by wheel braking is avoided, and the maintenance cost of the railway vehicle is reduced; when it is judged that the wheels are in the locked state under the action of the brake calipers, the output pressure of the brake cylinder to the brake calipers is cut off or reduced, the wheel shafts and the wheels are separated from the locked state, sliding friction of the wheels to a rail can be changed into static friction, the brake efficiency is improved, and the brake distance is shortened; meanwhile, the abrasion effect on the wheels is further reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of rail vehicle braking, in particular to an electric braking system for rail vehicles. Background technique [0002] At present, there are many types of brakes for rail vehicles. Some brakes are braked on the wheel rim, and some use caliper brakes similar to automobile disc brakes on both sides of the wheels of the bogie wheel set; but these structures have a The same feature, regardless of the structure of the brake of the rail vehicle, the braking power comes from compressed air; the compressed air is usually stored in the air storage tank of each car, and the release of the parking brake requires compressed air as power. If the compressed air leaks or the compressed air pressure is insufficient, there will be a problem that the parking brake cannot be released; at the same time, because the wheels are locked by the brakes during emergency braking, sliding friction will occur between the wheels and the tr...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many types of brakes for rail vehicles. Some brakes are braked on the wheel rim, and some use caliper brakes similar to automobile disc brakes on both sides of the wheels of the bogie wheel set; but these structures have a The same feature, regardless of the structure of the brake of the rail vehicle, the braking power comes from compressed air; the compressed air is usually stored in the air storage tank of each car, and the release of the parking brake requires compressed air as power. If the compressed air leaks or the compressed air pressure is insufficient, there will be a problem that the parking brake cannot be released; at the same time, because the wheels are locked by the brakes during emergency braking, sliding friction will occur between the wheels and the track. The friction force is reduced and the braking effect is poor. On the other hand, frequent sliding friction will aggravate the wear of the wheels, resulting in increased maintenance costs and reduced vehicle driving safety.

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