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首页> 外文会议>International Conference on Fluid Power Transmission and Control(ICFP' 2005); 20050405-08; Hangzhou(CN) >Numerical Analysis of the Flow Field around a Ribbed Helix Lip Seal
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Numerical Analysis of the Flow Field around a Ribbed Helix Lip Seal

机译：带肋螺旋唇形密封件周围流场的数值分析

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摘要

In this study, a direct numerical simulation model has been developed to aid in the understanding of the pumping mechanism of a ribbed helix lip seal. A SIMPLEC numerical algorithm with the staggered-grid arrangement is employed to simulate the flow field around the contact region between the lip and the shaft in the environment of a pumping-rate test rig, where both air and oil sides are filled with oil initially. The streamline pattern and pressure field are examined. Complicate three-dimensional streamline topology is analyzed. The vortex generated next to the lip on the oil side rotates such to create an inward pumping effect. On the air side, pressure built up on the windward faces of ribbed helices next to the lip also help pumping oil back to the sump. The pumping rates are calculated at shaft speeds, ranging from 1000 to 6000 rpm, and compared to the measured values from the test rig. Good agreement is observed. Both calculated and measured pumping rates increase as shaft speed and sump temperature increase and as the sealed fluid viscosity decreases. The current results demonstrate the promising application of CFD in the design of radial lip seals.
机译：在这项研究中，已经开发了直接数值模拟模型，以帮助理解带肋螺旋唇形密封件的泵送机理。采用交错网格布置的SIMPLEC数值算法来模拟抽速试验台环境中唇和轴之间的接触区域周围的流场，在该试验环境中，空气和油侧首先都充满了油。检查流线型式和压力场。分析了复杂的三维流线拓扑。油侧唇边附近产生的涡旋旋转，从而产生向内的泵吸效果。在空气方面，靠近唇的肋状螺旋形的迎风面上形成的压力也有助于将油抽回油底壳。抽速是在轴转速为1000到6000 rpm的情况下计算的，并与测试设备的测量值进行比较。观察到良好的一致性。随着轴速度和油底壳温度的升高以及密封液粘度的降低，计算出的和测量出的抽速均增加。目前的结果证明了CFD在径向唇形密封设计中的应用前景。

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