Performance test method and test bench for train air brake anti-skid device

Abstract

The invention discloses a train air brake antiskid device performance test method. Firstly, a driving device drags and accelerates rail wheels, and a wheel set is driven to rotate until the axle speedof the wheel set rises to an initial braking speed and is kept constant; then, after the speed of the wheel set is stabilized, a braking device applies braking force to the wheel set until the wheelset stops rotating, and a data acquisition device acquires the circumferential speed of the rail wheels and the circumferential speed of the wheel set in real time in the braking process; then, the braking distance and speed difference are calculated by utilizing the acquired circumferential speed of the rail wheels and the acquired circumferential speed of the wheel set; and finally, the performance of the antiskid device is evaluated according to the braking distance and the speed difference. An electric inertia simulation function is developed for a rail wheel driving motor control system of a single-wheel set test bed, and a braking effect that the circular motion speed and deceleration of the rail wheels are consistent with the translational motion of a vehicle is achieved, and therefore, the test bed can be used for testing the performance of the braking antiskid device.

Description

technical field [0001] The application relates to the technical field of rail transit testing, in particular to a performance testing method and a test bench of a train air brake anti-skid device. Background technique [0002] As the running speed of the train continues to increase, the wheel-rail adhesion coefficient decreases. Especially in the wet and slippery state of the rail surface, the extremely low wheel-rail adhesion makes it easy for the wheels to slide when the train brakes, which will directly The braking distance will be extended, and in severe cases, the wheel tread may be scratched, thereby reducing the running quality of the vehicle and even endangering driving safety. [0003] In order to reduce sliding as much as possible, brake anti-skid devices are usually installed on trains at present, and the adhesion characteristics should be fully utilized to reduce the braking distance while preventing slipping. Because it is directly related to the running safety...

AI Technical Summary

Problems solved by technology

If the simulation test method is used, due to the complexity of the wheel-rail adhesion characteristics, as well as the uncertainty of the wheel-rail surface state and the distribution of the medium on the contact surface, the wheel-rail adhesion force during the braking process cannot be accurately calculated through simulation. The wheel peripheral speed, braking distance and other parameters calculated on the basis also have the problem of low reliability; Risk of damaging the wheel and therefore less economical

[0005] Based on the above defects, the existing methods are difficult to accurately and comprehensively evaluate the performance of anti-skid devices

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