液力变矩器端盖扭转疲劳强度测试系统开发  

Test system development for the torsion fatigue strength of torque converter end cap

作　　者：邹喜红[1] 程凯华[1] 向辉 王瑞东[1] 田横 ZOU Xihong;CHENG Kaihua;XIANG Hui;WANG Ruidong;TIAN Heng(Key Laboratory of Manufacture and Test Techniques for Automobile Parts,Ministry of Education,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学汽车零部件制造与检测技术教育部重点实验室,重庆400054

出　　处：《中国科技论文》2018年第16期1896-1901,共6页China Sciencepaper

基　　金：国家自然科学基金资助项目(51205432);西华大学汽车工程四川省高校重点实验室开放课题资助项目(szjj2014-071)

摘　　要：针对目前在液力变矩器端盖扭转疲劳强度测试方法方面,采用电机加载存在响应特性差等不足,且没有关注应力分布的影响等问题,以液力变矩器端盖为研究对象,利用力学测试系统(mechanical testing simulation,MTS)液压传动伺服系统设计并组建具有高动态响应特性的液力变矩器端盖扭转疲劳强度测试系统。通过受力分析在液力变矩器端盖合理选取并布置了应变测点,以斜坡信号和正弦信号2种加载方式来模拟稳态加减速载荷和交变载荷,分别改变加载速度和幅值进行了多工况测试,并对测试结果进行了分析。结果表明:各测点应力均与加载幅值成正比,但由于正弦加载比斜坡加载快得多,因此相同扭矩的正弦和斜坡加载时,正弦加载引起的各点应力均偏大;采用斜坡加载时,加载速度对各测点应力大小影响不大,但采用正弦加载时,加载频率对各测点应力大小影响较大,基本上随着频率的增加,各测点应力大小正比例增大。Aiming at the problems such as the poor response characteristics of motor loading and insufficient consideration on the stress distribution effects in current test methods for the torsional fatigue strength of torque converter end caps, the mechanical testing simulation （MTS） hydraulic servo system was used to design and set up the torsional fatigue strength test system of the torque converter end cap with high dynamic response. Through the force analysis, the strain measuring points were reasonably selected and arranged on the end cap of the torque converter, and the steady-state acceleration and deceleration loads and the alternating loads were simulated by the two loading methods of the ramp signal and the sinusoidal signal. Multi-condition tests were conducted by changing the loading speed and the amplitude, and the test results were analyzed. The results show that the stress at each measuring point is proportional to the loading amplitude, but the stress induced by the sinusoidal loading is larger than that by the ramp loading when the torque is the same due to the larger loading speed for the former case. When the ramp loading is adopted, the loading speed has little effect on the stress of each measuring point. However, when the sinusoidal loading is utilized, the loading frequency has a greater impact on the stress magnitude at each measuring point. In general, the stress magnitude at each measuring point increases proportionally with the increase of the frequency.

关 键 词：液压传动 液力变矩器端盖 测试方法 加载 扭转疲劳 

分 类 号：TH137.9[机械工程—机械制造及自动化]