球面螺旋槽轴承特性的数值仿真分析

Numerical Simulation Analysis of Spherical Spiral Groove Bearing Characteristic

  • 摘要: 以球面螺旋槽轴承为研究对象,采用有限体积法对螺旋槽轴承油膜流场进行数值计算方法验证和数值模拟分析。数值结果与近似解析解的相对偏差较小,约为1%~2%,计算方法的准确性得到了保证。研究结果表明,在静态特性方面,轴承在同心稳定运转情况下,油膜对球轴承的轴向承载力随轴承转速和润滑油黏性系数的增加呈线性增加;摩擦功耗随黏性系数和转速平方的增加呈线性增加。动态特性方面,螺旋槽轴承的阻尼系数与转速无关,仅与介质黏性系数有关,且阻尼系数随黏性系数的增加呈线性增加。

     

    Abstract: Taking spherical spiral groove bearing as the research object, the calculation method of oil film flow field of spiral groove bearing was verified and the flow field was analyzed numerically by using the finite volume method. The relative deviations between the numerical results and the approximate analytical solutions are between 1% and 2%. The accuracy of the calculation method is guaranteed. In terms of static characteristics, the axial bearing capacity increases linearly with bearing speed and viscous coefficient, and the friction power increases linearly with viscous coefficient and rotational speed square. In terms of dynamic characteristics, the damping coefficient of spiral groove bearing is independent of rotational speed and only related to viscous coefficient of the medium, and the damping coefficient increases linearly with viscous coefficient.

     

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