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-  2018 

微菱形织构表面旋转轴密封性能研究

DOI: 10.13543/j.bhxbzr.2018.01.015

Keywords: 微菱形孔,密封性能,轴面,泵汲率,唇形密封,
micro-diamonds
,sealing performance,shaft surface,pump suction rate,lip seal

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Abstract:

综合考虑液膜空化及质量守恒边界条件,构建了轴面微菱形织构油封模型,通过数值计算获得膜压分布和微菱形孔结构参数对密封性能的影响关系。结果表明:微菱形孔所引起的动压效应可使膜压场产生变化,从而影响密封可靠性、润滑特性和泵汲效应;通过改变结构可控制泵吸方向、稳定液膜和减小摩擦。为提高稳定性和泵汲效应,并降低泄漏和磨损,选用半轴比γ=0.4~0.6、孔深h1=1.5~4.5μm和微孔旋转角α=40°~50°轴面微菱形孔织构更为合理。
Abstract:By comprehensive consideration of liquid film cavitation and mass conservation boundary conditions, a model of an oil seal with micro-diamonds textured on the axial surface has been established, and the film pressure distribution and the influence of the micro-diamond structure parameters on the sealing performance have been obtained through numerical calculation. The results showed that the dynamic pressure effect caused by the diamond pores causes the oil film pressure field to change, which results in changes in the reliability of the seal liquid membrane, lubricating properties and pump suction effects. The pump suction direction, stability of liquid membrane and friction reduction can be controlled by changing the structure. In order to both improve the stability of the liquid film and the pump suction effect, and reduce the leakage rate and wear, the axial surface micro-diamond pores should have an optimum texture in the range γ=0.4-0.6, h1=1.5-4.5μm and α=40°-50°.

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