材料物理参数对摩擦副热变形影响的研究  

Effect of Physical Properties of Material on Thermal Deformation of Friction Pairs

作　　者：崔建中[1] 王存堂[1] 谢方伟[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《盐城工学院学报（自然科学版）》2015年第2期1-8,共8页Journal of Yancheng Institute of Technology:Natural Science Edition

基　　金：江苏省普通高校研究生科研创新计划项目(CXLX13_643);国家自然科学基金青年科学基金项目(51205170);江苏省自然科学基金青年基金项目(BK2012292);中国博士后科学基金第6批特别资助(2013T60502)

摘　　要：为了深入研究材料物理参数对液粘调速离合器摩擦副的热变形影响,建立了摩擦副的热机耦合数学模型,采用有限元法对液粘调速离合器应用于软启动工况时摩擦副的热机耦合过程进行求解,详细分析了热传导系数、弹性模量和热膨胀系数对摩擦副应力场分布的影响。研究结果表明:摩擦副内、外径产生反向轴向位移,位移场中可见碟形翘曲变形;增大对偶片和摩擦衬片的热传导系数均有助于减小摩擦副的热应力;减小对偶片的弹性模量或热膨胀系数能有效减小摩擦副各表面的应力。The thermal- mechanical coupling model of friction pairs in hydro- viscous drive was established in order to deeply research the effect of physical properties of material on thermal deformation of friction pairs. A finite element technology was employed for analysis and calculation about the thermal- mechanical coupling process when it was used in the soft- start. A detail analysis of the effect of thermal conductivity,elasticity modulus and coefficient of thermal expansion on stress distribution was conducted. The results show that the inner side and outer side move in the opposite axial direction respectively and saucer-shaped warping deformation can be seen from the displacement field. Increase of thermal conductivities of separator disk and friction lining can help to decrease the thermal stress of friction pairs. Decrease of elasticity modulus or coefficient of thermal expansion can have a great effect on the decline of the stress of friction pairs.

关 键 词：液粘调速离合器 热机耦合 应力场 热变形 

分 类 号：TB131[理学—物理]