氮化铁磁性流体密封研究

Research on Static Sealing by Ferric Nitride Magnetic Fluid

利用磁性流体被磁场吸附的原理 ,探讨了氮化铁磁性流体密封装置的设计原理和动作过程 ,分析并通过试验验证了磁性流体密封承压能力 ,进而成功地研制了氮化铁磁性流体密封安全阀 .基于磁性流体密封安全阀开启压力稳定性、可控性和密封性能测试结果 ,所研制的样机已正常运行 10 0 0 0 h.

Based on the principle of the absorption of magnetic fluid by magnetic field, the design principle of ferric nitride magnetic fluid sealing device and its working process were discussed. The pressure bearing capacity of the designed static magnetic fluid seal was theoretically analyzed and experimentally verified by conducting a series of sealing tests. Accordingly, a safety valve was successfully constructed by making use of the ferric nitride magnetic fluid sealing. A pilot safety valve device was found to pass a series of tests including the opening pressure stability test, controllability test of the opening pressure, and sealing performance test. It was also found to operate smoothly for a duration above 10000 h.