摘要
采用气体加压方式,基于PLC系统设计制动钳拖滞力矩的快速检测系统,实现制动钳拖滞力矩的在线检测。使用伺服电机加精密减速机实现制动盘匀速转动,高压调压阀加电磁阀实现压力的高精密控制和充、排气的自动控制;PLC数据采集模块实时采集气压和扭矩值,并在触摸屏显示测试曲线和测试结果。试验结果表明,检测系统的制动盘系统端面跳动为0.04 mm,空转力矩为0.3 N·m,满足制动钳拖滞力矩测试需求;相对于传统的液压检测系统,气体加压检测第1圈拖滞力矩平均值比液体加压方式大0.020 5 N·m,第10圈拖滞力矩平均值为比液体加压方式大0.020 2 N·m。综合检测数据与系统硬件参数,对检测系统进行不确定度分析,拖滞力矩检测系统的不确定度为0.028 N·m,满足检测要求。
Based on the PLC system, the paper designs a fast detecting system of the brake caliper drag torque under air pressurization, which realized the online detection of brake caliper drag torque. The servo motor is used with a precision reducer to achieve the brake disc rotating at a constant speed, the high pressure control valve is used with a solenoid valve to achieve high precision pressure control and automatic control of pressure increase and decrease, data acquisition module of PLC is used to collect the pressure and torque value in real time and display the test curve and results on the touch screen. The test results show that the brake disc’ s end face runout is 0.04 mm and idle torque is 0.3 N ＊m, satisfying the brake caliper drag torque detecting requirements. Compared with the traditional hydraulic detecting system, the first loop＇s average drag torque under air pressurization is 0.0205N＊m greater than that under liquid pressurization and the tenth loop’s average drag torque under air pressurization is 0.020 2 N ＊m greater than that under liquid pressurization. According to the testing data and system parameters of hardware and uncertainty analysis of the detecting system, the uncertainty of drag torque detecting system is 0.028N＊m, meeting the test requirements.
出处
《中国测试》
北大核心
2017年第9期100-105,共6页
China Measurement & Test
基金
国家质量监督检验检疫总局科技计划项目(2015QK288)
浙江省公益技术研究项目(2016C31048)
杭州市汽车零部件智能检测科技创新服务平台(20151433S01)
关键词
制动钳
气体加压
检测系统
拖滞力矩
brake caliper
air pressurization
detection system
drag torque
