基于摩擦学二项式定理的超声振动减摩机理分析  

Mechanism for Friction Reduction of Ultrasonic Vibration Based on Binomial Theorem of Tribology

作　　者：秦法涛[1] 顾菊平[1,2] 张焱[2] 华亮[1] 易龙芳[1] 

机构地区：[1]南通大学电气工程学院,南通226019 [2]东南大学电气工程学院,南京210096

出　　处：《微电机》2010年第6期39-42,共4页Micromotors

基　　金：国家自然科学基金(60605024);江苏省"青蓝工程";"六大人才"项目(08KJB510017);南通市基金项目(226.k2008003.10);南通大学创新人才基金(03040315)

摘　　要：通过环型超声波电机定转子接触机理分析得到接触表面应力分布,利用摩擦学二项式定理,借助等效预压力分析了接触表面等效摩擦系数的变化,给出了计算定转子接触表面实际摩擦系数的理论模型。对单个波长接触区域内的应力及等效摩擦系数分布进行了计算,得到固定预压力变振幅以及固定振幅变预压力情况摩擦系数的变化。结果表明定子表面质点超声振动的垂直方向位移是摩擦系数降低的根本原因,这为超声波电机摩擦材料的选择和使用提供了理论依据。Through the study of the contact mechanism of stator and rotor,the normal stress varies in contact region of one wavelength was considered in this paper.Based on binomial theorem of tribology,a mathematical model was deduced to calculate the effective frictional coefficient of USM contact surface and the effective frictional coefficient within one wavelength by some different condition.The results reveal that the vertical displacement of the particle on the stator is the causes of friction reduction and that will be proposed for the choice of frictional materials.

关 键 词：摩擦学二项式定理 超声波电机 接触模型 超声振动减摩 

分 类 号：TM351[电气工程—电机] TM361