新型三叉式万向联轴器等温弹流润滑特性分析  

Analysis of Isothermal Elastohydrodynamic Lubrication Characteristics of a New Type of Trigeminal Universal Coupling

作　　者：徐雨田 李松梅[1] XU Yutian;LI Songmei(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061

出　　处：《青岛科技大学学报（自然科学版）》2020年第2期81-87,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：山东省重点研发科技计划项目(2018JMRH0508);青岛市科技计划项目(18-2-2-21-jch).

摘　　要：针对原先的三叉式万向联轴器在使用中产生的摩擦、磨损、润滑问题,提出一种将原有的面接触滑动摩擦改成点接触滚动摩擦的新型三叉式万向联轴器结构;为保证新结构在传动轴上应用时的稳定性、可靠性及耐久性,对其进行等温弹流润滑特性分析.建立改进后新结构的接触模型,对其进行点接触等温弹流润滑特性分析;研究了润滑特性随输入轴频率、载荷、偏转角的变化情况.研究结果表明:其他条件恒定,使输入轴频率提高,膜厚数值将增大,压力提升,且二次压力峰的峰值跟着提高;使载荷变大,膜厚将变薄,压力减弱,且压力起初增大的位置更靠后,二次压力峰更不突出;使偏转角变大,膜厚将变厚,压力增强,且接触中心区域更加突出,压力起初增大的位置更靠前,二次压力峰的位置更提前.In order to solve the friction,wear and lubrication problems of the original three-fork universal joint in practical applications,This thesis designed a new type of trigeminal universal coupling structure that changes the original surface contact sliding friction into point contact rolling friction.We analyzed the characteristics of isothermal elastohydrodynamic lubrication to ensure new construction on the drive shaft stability,reliability and durability.First,we established a contact model of the improved new structure and analyzed the isothermal elastohydrodynamic characteristics of the point contact.Then we studied the input shaft frequency,load,deflection angle and its lubrication characteristics.Research indicated,other being equal,the faster the input shaft frequency could lead to the thicker the oil film thickness,the higher oil film pressure and the higher the secondary pressure peak.The higher load could cause the thinner the oil film thickness,the lower oil film pressure,the later position where the pressure begins to increase and the less obvious second pressure peak.The greater the deflection angle could bring about the thicker the oil film thickness,the higher oil film pressure,the earlier position where the pressure began to increase and the earlier position which the secondary pressure peak was located.This phenomenon was more pronounced in the contact center area.

关 键 词：三叉式万向联轴器 等温弹流润滑 油膜厚度 二次压力峰 

分 类 号：TH131.9[机械工程—机械制造及自动化]