摘要
针对几何误差对多孔质气静压轴承性能的影响,采用基于有限体积法的Fluent软件对流场进行三维建模仿真。研究了几何误差对多孔质气静压轴承承载力和刚度的影响,得到以下结论:几何误差形成的气膜间隙变化造成的压力分布不均,当中凸-直线、中凸-圆弧和圆锥度误差在3μm以内时,对气静压轴承的性能有明显的提高;沿径向方向上倾斜3μm以内时,对气静压轴承的性能影响不大;中凹和椭圆度误差对气静压轴承的性能有负作用。
The effect of geometric error on the performance of porous aerostatic bearing is studied in this paper. The three- dimensional models of porous aerostatic bearing are built and the simulations are carried out with the Fluent software based on the finite volume method. The influence of the capacity and stiffness of porous aerostatic bearing are obtained; the distribution of uneven pressure caused by gas film clearance changes,error within 3μm of conicity and bulge in the middle can improvement the performance of porous aerostatic bearing; within 3μm of slope on the radial direction has a little influence; error of ovality and concave have a negative effect on the performance of porous aerostatic bearing.
出处
《制造技术与机床》
北大核心
2016年第7期35-40,共6页
Manufacturing Technology & Machine Tool
基金
国家自然科学基金资助项目(51475485)
国家自然科学基金资助项目(51405523)
郑州市科技攻关项目(121PPTGG363-6)
关键词
气静压轴承
几何误差
承载力
刚度
aerostatic bearing
geometric error
loading capacity
stiffness
