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动力回油是提高旋转轴唇密封性能的有效手段。为了研究轴表面微观形貌对反向泵送效应的影响,对轴表面加工微螺旋槽进行数学建模,结合一种典型的油封结构,基于有限元静力分析,建立2维Reynolds方程,通过内外两层循环迭代进行数值求解。结果表明:轴表面微螺旋槽具有反向泵送效应,泵送率随转速的升高而增大。在轴表面加工微螺旋槽结构是实现零泄漏的一个可行思路。该算法可以用于其他油封结构的密封特性研究和轴表面微观形貌对密封性能的影响分析。
Power oil return is to improve the performance of the rotary shaft lip seal an effective means. In order to study the effect of the micro-morphology of the shaft surface on the reverse pumping effect, the micro-spiral groove machining on the shaft surface is mathematically modeled. Combined with a typical oil seal structure, a 2-D Reynolds equation is established based on the finite element static analysis Both inner and outer loop iteration for numerical solution. The results show that the micro-spiral groove on the shaft surface has the reverse pumping effect, and the pumping rate increases with the increase of the rotating speed. Machining a micro-spiral groove structure on the shaft surface is a feasible idea to achieve zero leakage. The algorithm can be used to study the sealing characteristics of other oil seal structures and analyze the influence of shaft surface microstructure on the sealing performance.