金属往复滑动摩擦噪声与摩擦表面形貌特征关系的研究

PROFILE ANALYSIS RELATED TO FRICTION-INDUCED NOISE UNDER RECIPROCATING SLIDING CONDITIONS

采用声学和动力学测量技术准确地跟踪金属往复滑动摩擦噪声发生的位置。通过对摩擦件上发生摩擦噪声的地方进行SEM观察及三维表面形貌分析,可以清楚地看出平面-平面接触发出摩擦噪声时的表面形貌以麻坑状犁沟的不均匀断裂、表面粗糙度比较大为主要特征。一并对这种摩擦材料的片状不均匀断裂引起摩擦噪声的机理进行了讨论。

Acoustic and dynamic measuring techniques are applied to locate the area where squeal is present on a wear scar under reciprocating sliding. SEM observations and 3 Dimension topography measurements of wear scars are conducted. A comparative investigation on characteristics of scar surfaces is carried out under both silent and squealing conditions. The result shows that the area of a wear scar with squeal is characterized by uneven and serious pit-like detachment of the specimen material. Mechanism of generation of squeal is also discussed based on the detachment of the material.