柴油机配气机构滚轮强度分析
Strength Analysis of Roller of Diesel Engine Gas Distribution Mechanism
本文以某型柴油机配气机构为研究对象，利用UG软件建立配气机构的三维模型并搭建刚体运动学计算模型，得到排气滚轮接触力曲线；利用ANSYS软件建立柔性体有限元仿真模型，计算得到不同宽度滚轮的最大接触应力，并将有限元计算结果与赫兹公式计算结果进行对比。结果显示，两种方法计算得到的接触应力相对误差在2%以内，并且21mm至16mm宽度下的滚轮最大接触应力为689.27MPa至797.27MPa,均小于许用接触应力，滚轮不会发生破坏。
This paper took a certain type of diesel engine gas distribution mechanism as the research object, used UG software to establish the three-dimensional model of the gas distribution mechanism, and built the rigid body kinematics calculation model to get the contact force curve of the exhaust roller. ANSYS software was used to establish the finite element simulation model of the flexible body, calculated the maximum contact stress of the roller with different widths, and compared the finite element results with the results of the Hertz formula cal-culation. The results show that the relative error of the contact stresses calculated by the two methods is within 2%, and the maximum contact stresses of the rollers with widths from 21mm to 16mm are ranging from 689.27MPa to 797.27MPa, which are smaller than the permissible contact stresses, indicating that the rollers are not being damaged.
王贵新;俞谦;赵嘉琪;刘帅凝;赵鹏宇;
哈尔滨工程大学 能源与动力工程学院,哈尔滨 150001;哈尔滨工程大学 能源与动力工程学院,哈尔滨 150001;哈尔滨工程大学 能源与动力工程学院,哈尔滨 150001;哈尔滨工程大学 能源与动力工程学院,哈尔滨 150001;哈尔滨工程大学 能源与动力工程学院,哈尔滨 150001;
TK422
gas distribution mechanism roller finite element analysis hertzian equation contact stress
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