专用汽车举升机构支撑轴承滚道的载荷波动特性研究  

RESEARCH ON LOAD FLUCTUATION CHARACTERISTICS OF SUPPORT BEARING RACEWAY FOR SPECIAL VEHICLE LIFT MECHANISM

作　　者：王中磊[1] 孙海波[1] WANG ZhongLei;SUN HaiBo(Changzhou,Vocational Institute of Engineering,Changzhou 213164,China)

机构地区：[1]常州工程职业技术学院,常州213164

出　　处：《机械强度》2020年第3期747-752,共6页Journal of Mechanical Strength

基　　金：常州工程职业技术学院教育研究重点专项项目(2017YZX002);江苏高等教育质量保障与评价研究资助。

摘　　要：传动系统的载荷波动是引发设备疲劳的重要因素,而疲劳失效是设备失效或损坏最为常见的失效模式;以某专用汽车举升机构传动系统为研究对象,建立传动系统主要零部件三维模型,运用有限元及振动频率检测的方法,系统分析了传动系统螺栓设计对传动系统支撑轴承滚道载荷波动特性的影响。研究结果表明:传动系统中的螺栓预紧力会改变支撑轴承滚道的接触变形,影响支撑轴承的接触载荷;在螺栓预紧力和外载荷共同作用下,支撑轴承接触载荷循环波动大,降低传动系统支持轴承疲劳寿命。增加支撑轴承套圈的壁厚、减小螺栓的预紧力、增加螺栓孔与支撑轴承之间距离等方面的优化,可以有效减小传动系统支撑轴承循环波动载荷,从而提升传动系统疲劳寿命;优化后的传动系统振动小于优化前。该研究为传动系统综合传动性能的提升、支撑轴承疲劳寿命的提高提供理论依据。The load fluctuation of the transmission system are important factors that cause equipment fatigue,and the fatigue failure has been the most common failure mode of the transmission system.Therefore,a special vehicle lift mechanism transmission system has been regarded as the research object,the three-dimensional model of the main components of the transmission system has been established,and the influences of the bolt design on the load fluctuation characteristics of support bearing raceway of transmission system have been analyzed by the finite element and vibration frequency detection methods.The research results show that the bolt pre-tightening force in the transmission system change the contact deformation of the raceway of the supporting bearing and then affect the contact load of the supporting bearing.Under the combination influence of the bolt pretightening force and the external load,the supporting bearing contact load fluctuate greatly,which reduce the fatigue life of the supports bearing of transmission system obviously.The optimization of the wall thickness of the supports bearing,reducing the pre-tightening force of the bolt,and increasing the distance between the bolt hole and the supports bearing can effectively reduce the cyclic fluctuation load for the supports bearing of transmission system,thereby improving the fatigue life of the transmission system;the vibration of the transmission system was reduced after optimization.The research provides a theoretical basis for the comprehensive transmission improvement of the performance of transmission system,and the improvement of the fatigue life of the support bearing.

关 键 词：专用汽车 举升机构 支撑轴承 接触载荷 波动特性 

分 类 号：TH133.36[机械工程—机械制造及自动化]