机械密封橡胶静环端面比压与变形量关系

Relationship of Face Specific Pressure and Deformation of Rubber Float Ring in Mechanical Seal

为了将端面比压值准确地应用到机械密封的安装或维修过程中,研究机械密封端面比压与变形量的关系。利用ANSYS建立某机械密封橡胶静环的有限元模型,对静环接触面施加不同的面力,分析其接触面不同节点处的变形情况和沿半径方向的变形情况。结果表明,Mooney-Rivlin模型中材料常数C2和C1的比值对橡胶静环位移变形量的影响很小。橡胶静环接触面变形量的增量随径向半径的增大而减少。利用最小二乘法拟合出端面比压和静环变形量的关系表达式,通过该表达式可将机械密封设计阶段的端面比压值转化为直观的位移,利用位移来确定动环的位置,为后续的安装、维护提供理论依据。

In order to apply the face specific pressure accurately in the install or repair process of mechanical seal, the relationship of face specific pressure and deformation of the mechanical seal was studied. ANSYS was used to establish the finite element model of the rubber float ring of a mechanical seal. By applying different contact press on the contact surface of the float ring, the deformation at different nodes of the contact surface and along the radial direction of the contact sur- face was analyzed. The results show that, in the Mooney-Rivlin model, the ratio of material constants CJC~ has little effect on displacement deformation of rubber ring. With the increasing of rubber ring radius, the increment of deformation of the contact surface is reduced. The relationship expression of face specific pressure and deformation was fitted by using the least square method, which can be used to transform the face specific pressure into intuitive displacement during the de- sign phase of mechanical seal. The location of floating ring was determined by the displacement, and theoretical guidance was provided for the subsequent installation and maintenance.