电动汽车差速器扭转冲击疲劳试验方法

针对电动汽车传动系的关键零部件差速器的实际受载情况,设计了基于液压伺服的电动汽车差速器扭转冲击疲劳试验系统.在此基础上,依照目前的试验技术条件,分析了差速器关键部件的应力集中部位,对加载波形、加载频率、加载幅值和加载频次进行了理论和载荷特征研究,构建了电动汽车差速器扭转冲击疲劳应变测试系统和测试方法,并对其进行了大量应...

Torsional Impact Fatigue Test Method for Electric Vehicle Differentials

According to the actual load situation of the differential which were the key component of the electric vehicle transmission systems, a torsional impact fatigue test system for the differentials of the electric vehicles was designed based on hydraulic servo. The stress concentration parts of the key components of the differentials were analyzed under the current test technical conditions, and the loading waveform, loading frequency, loading amplitude and loading frequency were researched in theory and load characteristics. The torsional impact fatigue strain test system and test method of electric vehicle differentials were constructed, and a large number of strain tests were carried out. The test data of different frequencies and amplitudes were statistically analyzed. Combined with the analysis results and the material stress-life (S-N) curve, a complete torsional impact fatigue test method of electric vehicle differentials was established. The results indicate that the fatigue failure site and form of differentials are consistent with those of real vehicles and stress concentration measuring points.