旋转轴唇形密封圈的建模与仿真研究

发布时间：2018-06-10 17:07

本文选题：唇形密封 + 泵汲效应　；参考：《润滑与密封》2017年06期

【摘要】：为了进一步研究唇形密封圈的密封机制,建立唇形密封的理论模型。基于流量因子分析轴向泵汲效应,建立泵汲流量方程;运用圆周平均雷诺方程描述密封界面流场,采用G-W模型近似描述唇轴粗糙峰互相接触下的接触力与径向变形;定量分析密封界面的周向摩擦力,并给出流体摩擦表达式;对以上各因素进行强耦合分析。结合船舶桨轴密封圈的实际应用工况及结构参数进行仿真计算,得出其方向角、膜厚、压力分布,并得到净流量随转速和粗糙度的变化关系。研究结果表明:净流量随转速增加而增加,但增速逐渐变缓;净流量随粗糙度近似呈线性增加,但高粗糙度会使泄漏量增大和导致表面更容易被磨损,因此实际唇口粗糙度的选取应综合考量多种因素。
[Abstract]:In order to further study the sealing mechanism of lip seal ring, the theoretical model of lip seal was established. Based on the flow factor analysis of axial pump swabbing effect, the pump swabbing flow equation is established, the circular average Reynolds equation is used to describe the sealing interface flow field, and the G-W model is used to approximate describe the contact force and radial deformation of lip shaft rough peak when they are in contact with each other. The circumferential friction of the sealing interface is quantitatively analyzed, and the fluid friction expression is given, and the strong coupling analysis of the above factors is carried out. Combined with the practical application conditions and structural parameters of the marine propeller shaft seal ring, the direction angle, film thickness, pressure distribution and the relationship between the net flow rate and the rotational speed and roughness are obtained. The results show that the net flow rate increases with the increase of rotational speed, but the growth rate gradually slows down, and the net flow rate increases linearly with roughness, but high roughness increases leakage and makes the surface wear more easily. Therefore, the selection of actual lip roughness should consider a variety of factors.
【作者单位】：上海理工大学机械工程学院;上海海宫液压技术有限公司;
【分类号】：TH136

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