汽车发动机用窄型链的多冲磨损特性研究

为了提高国产机油泵链条的性能,满足发动机轻量化的个性需求,通过发动机总成试验,研究了一种窄型的汽车发动机机油泵链06BN-1的磨损机制,并对套筒和销轴的磨损表面进行微观分析.结果表明,汽车发动机机油泵链的主要磨损形式为疲劳磨损,销轴?套筒零件表面的裂纹生成?扩展与剥落是其主要磨损失效机制.销轴和套筒零件均发生循环软化,滚子零件发生循环硬化.微动磨损是汽车链＂散架＂失效的重要原因之一.保证滚子零件具有足够的强度与塑性,并采取合理的成形工艺,是提高滚子零件多冲抗力的有效方法

Multicycle Impact Wear Property of Automotive Engine Oil-Pump Narrow -Width Chain

The failure mechanism of the automotive engine Oil -pump chain and the worn surface morphology of the rubbing pair of bush and pin were studied .Results showed that the main wear mechanism of automotive engine Oil -pump chain was fatigue wear , and its failure mechanism was the initiation , propagation of cracks and flaking on top layer of pin and bush .Cyclic softening occurred on pin and bush while cyclic hardening occurred on roller .Fretting wear was one of the contributions for failure of automotive chain .The effective ways to increase the resistance to multi -impact were ensuring sufficient strength and plasticity of roller as well as adopting suitable shaping technique.