关节轴承摩擦温度场计算方法

摘要/Abstract

摘要：

以推力型关节轴承为研究对象，分析了轴向载荷下的接触应力，并根据试验所得摩擦力矩反推出了动态摩擦因数。结合接触应力及摩擦因数求出了摩擦热流率，并将其作为第二类边界条件进行了轴承非定常温度场有限元分析，最后利用红外热像仪拍摄了摩擦过程中轴承侧表面温度分布，检验仿真结果的可靠性。仿真与试验结果表明：该计算方法解决了球面摩擦副摩擦因数的精确计算和热流率的空间分配问题，建模时忽略球面间隙会直接影响接触应力分布并造成温度场分布出现较大误差，考虑球面间隙可以更精确地计算轴承摩擦温度场。

关键词: 关节轴承, 球面间隙, 接触应力, 温度场, 红外测量, 有限元

Abstract:

Taking thrust spherical plain bearing as the research object,the contact stress under axial load was analyzed and based on the experimental friction torque the dynamic friction coefficient was solved.Then combined with contact stress and friction coefficient,heat flow rate was calculated and served as the second boundary condition for the unsteady temperature field finite element analysis of the bearing.Finally,using infrared camera to shoot the outer surface of two-dimensional temperature distribution of the bearing friction process,then reliability of simulation results was tested.Simulation and experimental results show that: the calculation method has solved the problems of accurate calculation of spherical friction coefficient and spatial distribution of the heat flow rate.Ignoring the spherical gap when modeling will affect the contact stress distribution directly and cause a larger error in temperature distribution.Considering a spherical gap a more accurate bearing friction temperature field can be obtained.

Key words: spherical , plain bearing;spherical gap;contact stress;temperature field;infrared measurement;finite element

中图分类号:

TH117.1

俞建卫, 王礼飞, 魏巍. 关节轴承摩擦温度场计算方法[J]. 中国机械工程, 2015, 26(10): 1284-1288.

Yu Jianwei, Wang Lifei, Wei Wei. Calculation Method of Spherical Plain Bearing Friction Temperature Field[J]. China Mechanical Engineering, 2015, 26(10): 1284-1288.

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