Finite Element Analysis of Sealing Performances of the Rotary Lip Seal
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摘要: 利用有限元分析软件建立了旋转唇形油封的二维轴对称模型,分析了过盈量、弹簧劲度系数、空气侧唇角3种重要参数对油封接触宽度和唇口接触压力分布的影响,并用理论分析的方法估算出泵汲率和生热量。结果表明:随过盈量的增大,生热量几乎呈直线增加,泵汲率也不断增加,但其增速逐渐变缓;随弹簧劲度系数的增加,生热量不断增加,泵汲率变化不大;随空气侧唇角的增加,油封的泵汲率不断减少;随轴转速增加,油封的泵汲率和生热量均快速增加。Abstract: A 2-D axisymmetric finite element model is established for the rotary lip seal. The influences of the difference between lip and shaft diameters, spring stiffness coefficient and the contact surface angle of the air on the contact width and the contact pressure distribution are gotten. Moreover, based on results of the finite element analysis, the pumping rate and the amount of heat generation are estimated with theoretical analysis method. The results show that the amount of heat generation increases linearly and the increasing rate of pumping rate becomes slow as the interference between the shaft and seal increases; with the increase of spring stiffness coefficient, the amount of heat generation increases quickly, whereas, the pumping rate changes little; the pumping rate decreases with the increase of contact surface angel of the air of the oil seal; as the shaft speed increases, the amount of heat generation and pumping rate increase rapidly.
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Key words:
- angular velocity /
- estimation /
- film thickness /
- finite element analysis /
- finite element method
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