车辆传动装置密封环摩擦状态辨识的试验研究

摘要

For exploring the cause of the premature failure of seal ring in vehicle transmission device and understanding the rule of transform in sealing friction states and its effects on sealing performance, the friction coefficient versus operating parameter curves, i. e. f-G curves are obtained by a measurement on a sealing performance test rig for transmission device, the changing rule of sealing friction states at different oil temperature conditions is studied, and the effects of friction state transform on sealing performance are analyzed. The results indicate that under the set test conditions, the transforming rule of friction states of seal ring and its identification features can be revealed by f-G curves; But the change of friction states of seal ring only has limited effects on seal leakage while the influences of the temperature rise of seal ring are more apparent.%为探讨车辆传动装置的密封环早期失效的原因,掌握密封摩擦状态转变规律及其对密封性能的影响,利用传动装置密封性能试验台,测得摩擦因数-工况参数曲线(即f-G曲线),研究了不同油温条件下密封摩擦状态的变化规律,分析了密封环摩擦状态转变对密封性能的影响.结果表明,在设定的试验条件下,通过f-G曲线可揭示密封环在高速重载工况下摩擦状态转变规律及其辨识特征；密封环摩擦状态的转变对泄漏量的影响有限,而对密封环温升的影响较为显著.