磁流体润滑螺旋槽机械密封中的热流固耦合分析

为了研究磁流体润滑螺旋槽机械密封中的热流固耦合效应，利用ANSYS Workbench软件计算了磁流体膜的压力分布、温度分布和动环的变形量，分析了电流强度、转速和磁性颗粒体积分数对磁流体膜压力、温度和动环变形的影响。结果表明：随着电流强度、转速和磁性颗粒体积分数的升高，磁流体膜的动压、温度和密封环的热变形都增大；内径处的磁流体温度最高但压力最低，磁流体基液易汽化；动环的压力变形远小于热变形；磁流体膜的压力、磁流体膜温度的数值解大于试验值和解析值，其主要原因在于数值解考虑了密封堰和离心力对磁流体膜的影响。

Coupling Analysis of Heat-fluid-solid in a Spiral Groove Mechanical Seal Lubricated by Magnetic Fluid

To study coupling effect of heat-fluid-solid in a spiral groove mechanical seal lubricated by magnetic fluid,the pressure distribution,temperature distribution of magnetic fluid film and deformation of rotating ring were calculated by ANSYS Workbench,and the effects of current intensity,rotating speed,and magnetic particle volume fraction on pressure,temperature of magnetic fluid film and deformation of rotating ring were analyzed.Results indicate that the pressure,temperature of magnetic fluid film and deformation of rotating ring increase with the increase of current intensity,rotating speed,and magnetic particle volume fraction.Near the inner radius,the temperature of magnetic fluid at the inner diameter is higher but the hydrodynamic pressure is lower,and the base fluid of magnetic fluid is prone to vaporization.The pressure deformation is far less than thermal deformation of rotating ring.The pressure and temperature obtained by numerical solution are larger than those obtained by analytical solution and experimental values,mainly because the effects of seal weir and centrifugal force on magnetic fluid film are considered in the numerical solution.