The magnetic fluid seal is widely used in the high-speed mechanical devices. Also, the temperature of the seal increases with the viscous heating under the high shearing rate in the magnetic fluid. However, the influence of the temperature on the sealing performance has not been studied quantitatively in the available research. In this article, the change rule of magnetic fluid temperature and the influence on the sealing performance are researched through the simulation and experiment methods. The thermal field simulation is conducted with the heat generation in the fluid. To calculate the decrease of the magnetic properties quantitatively, the magnetization curves under different temperatures are measured to carry out the relationship between the saturation magnetization and temperature. Based on the magnetization curve result, the two-phase flow between air and magnetic fluid is solved under different shaft rotation speeds with the influence of temperature change. Besides, the sealing experiment is conducted with the highest rotation speed of 8000 rpm. The results of the simulation and experiment show good consistency, and the sealing capacity decreases with the rise of rotation speed.

中文翻译：

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温升对旋转磁流体密封密封性能的影响

磁流体密封广泛应用于高速机械设备中。此外，密封件的温度随着磁性流体中高剪切速率下的粘性加热而升高。然而，在现有的研究中，温度对密封性能的影响尚未进行定量研究。本文通过仿真和实验方法研究了磁流体温度的变化规律及其对密封性能的影响。热场模拟是通过流体中产生的热量进行的。为了定量计算磁性能的下降，测量不同温度下的磁化曲线，以得出饱和磁化强度与温度的关系。根据磁化曲线结果，求解不同轴转速下受温度变化影响的空气与磁流体两相流动。此外，密封实验以最高转速8000 rpm进行。仿真与实验结果一致性好，密封能力随转速升高而降低。