高速机车防滑阀检测系统设计

Design of Detecting System for Anti-skid Valve of High Speed Locomotive

基于高速数据采集、PWM控制、差压测密封技术,研制了一套防滑阀性能检测系统,实现了对防滑阀的动作响应时间、阶段充排气性能和密封性检测。在模拟实车制动工况条件下,检测系统通过输出快速响应的PWM信号控制进气电磁阀、排气电磁阀高速通断,以此实现对防滑阀性能的高精确检测。测试系统经重复性实验结果表明,阶段充排气性能的最大测量不确定度为0.834 k Pa,密封性检测的最大不确定度为0.011 k Pa。

Based on the high-speed data acquisition technology, the PWM control technology and the sealing detec-tion method of differential p res su re,an anti-skid valve detecting system is designed. The detecting system can detect the action response t im e, the stage charging and exhausting air performance and the sealing performance of the anti-skid valve. Under the condition of the simulation of the actual braking condition, the system controls the solenoid valve on-off by outputting the PWM with fast response performance. It realizes a high accuracy detection of the per-formance of the anti-skid valve. The repetitive experiments are performed on detecting system. The test data show that the maximum uncertainty of the stage charging and exhausting air performance is 0. 834 k P a, and the sealing test is 0. Oil kPa.