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润滑油膜对轴承的胶合、擦伤和接触疲劳有重要影响.而以往对轴承的仿真均忽略了润滑油膜的存在,误差较大.首先在刚性套圈假设的前提下,基于Hertz接触理论,运用拟动力学法建立球轴承在径向、轴向载荷作用下的力学模型,以Newton-Raphson法为主要计算工具对模型进行求解,获得轴承在联合载荷作用下的接触载荷和变形,并求取了各个滚珠与内、外圈之间的接触刚度.基于弹性流体动力润滑(EHL)理论考虑润滑油膜对轴承动态特性的影响,求取滚动轴承油膜刚度.提出等效综合刚度的概念并求其值,在此基础上运用ADAMS软件对轴承进行准确的动力学仿真.
Lubrication film has important influence on the gluing, abrasion and contact fatigue of the bearing, while in the past, the simulation of the bearing neglects the existence of the lubricant film, and the error is larger.Firstly, based on the Hertz contact theory and the rigid ring hypothesis, The quasi-dynamic method is used to establish the mechanical model of ball bearings under radial and axial loads. The Newton-Raphson method is used as the main calculation tool to solve the model, and the contact load and deformation of the bearing under the combined loads are obtained. The contact stiffness between each ball and the inner and outer rings is obtained.According to EHL theory, the influence of lubricating oil film on dynamic characteristics of bearing is taken into account and the oil film rigidity of rolling bearing is obtained.The concept of equivalent integrated stiffness , On this basis, the use of ADAMS software bearing accurate dynamic simulation.