Experimental research on pressure characteristics of magnetic liquid sealing device with dual magnetic sources
The optimal design of the sealing structure has always been a research hotspot of magnetic liquid sealing.In this paper,a new type of magnetic liquid sealing device with dual magnetic sources is designed,and then the magnetic circuit model of the sealing device is constructed using the principle of electromagnetics.The magnetic circuit and pressure-withstanding equation of the gap,pole tooth width,pole tooth height,pole tooth groove width of the structure and the axial width of the permanent magnet are obtained,and then verified by experiments.The research results show that as the gap increases,the sealing pressure decreases exponentially.With the increase of the pole tooth width and the pole tooth groove width,the sealing pressure changes in a parabolic curve with the opening downward,and the maximum value is obtained at 1.5、4.5 mm,respectively.As the height of the pole tooth increases,the sealing pressure decreases linearly,but when the pole tooth height is small,the theoretical sealing pressure is large,there is magnetic leakage at the pole tooth,the actual sealing effect may not be good,so it is recommended that the pole tooth height should not be too small.Finally,the total pressure of the device is increased by about 50％compared with the device with only axial pole teeth,and the sealing capacity is significantly improved.
magnetic liquid sealdual magnetic source structurepressure characteristicsoptimization design
NETL
NSTL
万方数据
维普
