【作者】 周宁宁； 曲建俊； 王彦利；

【Author】 ZHOU Ningning,QU Jianjun,WANG Yanli (School of Mechatronics Engineering,Harbin Institute of Technology,Harbin,150001,China)

【机构】 哈尔滨工业大学机电工程学院；

【摘要】 利用自制的带超声波振动的摩擦实验装置,在常态和真空下,测试了PTFE基复合材料与磷青铜之间普通滑动和带有法向超声波振动情况下的滑动摩擦系数以及磨损情况,研究了环境压强和超声波振动幅值对滑动摩擦特性的影响。结果表明:环境压强对带有超声波振动的滑动摩擦系数有显著影响,随着真空度的增加,超声波振动减小摩擦的作用明显减弱。随着超声波振动幅值的增加,带有超声波振动的滑动摩擦系数减小。大气下,普通滑动时,磨损形式主要是犁削磨损;向带有超声波振动时,摩擦副之间的磨损较轻,主要以微动磨损为主。高真空下,普通滑动时,磨损以犁削磨损和粘着磨损为主,向带有超声波振动时,磨损主要以微动磨损和粘着磨损为主。更多还原

【Abstract】 The sliding friction coefficient and wear between PTFE based composites and bronze with or without normal ultrasonic vibration in atmosphere and vacuum were tested using a developed novel tribometer.The effect of environmental pressure,vibration amplitude and normal force on sliding friction coefficient and wear was studied.The results show that the effect of environmental pressure on friction reduction by normal ultrasonic vibrations was outstanding.The friction reduction by ultrasonic vibrations decreased as vacuum degree increased.The sliding friction coefficient with normal ultrasonic vibrations slowed down as the vibration amplitude increased.In atmosphere,plough wear is dominant in normal sliding condition.When the sliding was superimposed ultrasonic vibration,wear of friction couple became slight and fretting is the main wear.In vacuum,plough and adhesive were significant in normal sliding and fretting and adhesive were the main wear when the sliding was superimposed ultrasonic vibration.更多还原