磁性液体密封与机械密封组合密封技术研究

Study on the technology of combined seal of magnetic fluid seal and mechanical seal

以提高磁性液体饱和磁化强度和外加磁场强度的方式来提升磁性液体密封技术应用于密封液体的性能总是有一定的局限性。设计了磁性液体密封与机械密封组合密封的结构,并研究了组合密封的耐压能力。通过实验验证了组合密封分别应用于静密封液体和动密封液体时,密封耐压能力均高于磁性液体密封单独作用时的密封耐压能力,具有一定的实际价值。在流体动压密封原理的基础上,提出了流体动压型组合密封结构,为组合密封结构优化提供了一定的依据。

In order to improve the capacity in the magnetic fluid seal for sealing liquid, a kind of combined seal of magnetic fluid seal and mechanical seal was designed. But the performance of increasing saturation magnetization and magnetic field strength was not good. It mainly introduced the pressure-resistant capacity of combined seal of magnetic fluid seal and mechanical seal in this paper and verifies the pressure-resistant capacity of cornbined seal is better than the independent magnetic fluid seal both in the static seal and rotary seal for sealing liquid. The test indicated that this kind of combined seal structure had certain practical value. It presented a new type of fluid hydrodynamic combined seal according to the fluid hydrodynamic sealing principle in this paper, which would provide the basis for the structure optimization on combined seal.