CAJ | 학술논문

基于数据采集技术研制一套四回路保护阀性能检测系统,实现四回路保护阀密封性及压力特性的检测。引入差压检测法,整体密封检测精度提高到0．015 kPa；通过节流孔缓慢充气、排气,实现进气口和出气口的压力平衡,稳定测量开启压力,测量开启压力标准差不超过0．169 kPa；系统通过模拟汽车制动回路实际工况下进、出气管路泄漏或爆裂等失效状态,完成关闭压力、保护压力及动态关闭压力的测量。对四回路保护阀进行了20次性能测试实验,根据测试数据的重复性分析、系统元件的不确定度,对测试系统进行不确定度评定,整体密封性合成标准不确定度为0．008kPa,压力特性最大合成标准不确定度为0．856 kPa。测试结果表明,该系统能稳定测量四回路保护阀的性能,满足测试需求。
기우수거채집기술연제일투사회로보호벌성능검측계통,실현사회로보호벌밀봉성급압력특성적검측。인입차압검측법,정체밀봉검측정도제고도0．015 kPa；통과절류공완만충기、배기,실현진기구화출기구적압력평형,은정측량개계압력,측량개계압력표준차불초과0．169 kPa；계통통과모의기차제동회로실제공황하진、출기관로설루혹폭렬등실효상태,완성관폐압력、보호압력급동태관폐압력적측량。대사회로보호벌진행료20차성능측시실험,근거측시수거적중복성분석、계통원건적불학정도,대측시계통진행불학정도평정,정체밀봉성합성표준불학정도위0．008kPa,압력특성최대합성표준불학정도위0．856 kPa。측시결과표명,해계통능은정측량사회로보호벌적성능,만족측시수구。
The test system of four-circuit protection valve based on data acquisition technology is designed to achieve the sealing and pressure characteristic test of four-circuit protection valve. Detection method of dif-ferential pressure is introduced, detection precision of entirely sealing is raised to 0. 015kPa;inleting air and exhausting air slowly realize balance of inlet with outlet pressure through orifices, stable measurement of o-pening pressure is completed, test standard deviation is less than 0. 169kPa; measurement of closing pres-sure, protection pressure and dynamic closing pressure are completed by simulating leakage and burst failure state of inlet and outlet pipeline of vehicle brake circuit under actual working conditions. The performance test is carried out for four-circuit protection valve 20 times, uncertainty evaluation is taking for test system based on repeatability evaluation of test data, combined uncertainty of differential pressure is 0. 008kPa, maximum combined uncertainty of direct pressure is 0. 856kPa. The test results indicate the system can de-tect the performance of four-circuit protection valve steadily, and satisfies the design requirements.