双层滚珠轴承力学特性分析

基于拟动力学原理，在考虑轴承所承受的径向载荷、轴向载荷、滚珠自身离心力以及陀螺力矩联合载荷作用的影响下，建立双层滚珠轴承在高速及载荷作用下的力学模型，通过MATLAB编程仿真，分析不同载荷参数和结构参数对轴承力学特性的影响，并对计算方法进行了实验验证．研究结果表明：内外两节径关系直接影响到内圈和中圈之间的转速分配关系；径向载荷和轴向载荷对接触角的变化影响较大，直接关系到滚珠轴承的失效情况；工作转速、滚珠的材料、轴向预紧力以及滚珠初始接触角等对轴承的刚度影响较大．研究结果为双层滚珠轴承的设计和应用提供一定的理论依据．

Mechanical research of double-decker ball bearing

The mechanical model of the double-decker ball bearing was established and the relative calculation program compiled in MATLAB was developed based on the quasi-dynamic method by considering the radial load,axial load,centrifugal force as well as the gyroscopic moment acted on the bearing simultaneously.And the method was verified experimentally.The simulation results show that,the relationship between the inner and outer pitch diameters of the bearing determines the inner and intermediate races' rotate speed distribution.The radial and axial loads affect the ball contact angles relating to the bearing failure.Rotate speed,ball materials,axial preload as well as the initial contact angles greatly impact the bearing stiffness.The results provide a theoretical basis for the design and use of this bearing in high-speed rotor-bearing system.