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Analysis of rotor eddy current loss and thermal deformation of magnetic liquid double suspension bearing

High Technology Letters 2024年第3期30卷 322-332页

作者： LIU Hongmei YANG Guang SUN Yanan SUN Jian WANG Zhe ZHAO Jianhua Shijiazhuang Rail Transit Group Co.Ltd Shijiazhuang 050011P.R.China Shijiazhuang Haishan Industrial Development Co.Ltd Shijiazhuang 050200P.R.China Fluid Power Transmission and Control Laboratory Yanshan UniversityQinhuangdao 066004P.R.China

Magnetic-liquid double suspension bearing(MLDSB)is a new type of suspension bearing based on electromagnetic suspension and supplemented by hydrostatic *** affecting the electromagnetic suspension force,the hydrostatic supporting effect is increased,and the real-time coupling of magnetic and liquid supporting can be ***,due to the high rotation speed,the rotor part produces eddy current loss,resulting in a large temperature rise and large ther-mal deformation,which makes the oil film thickness deviate from the initial *** support and bearing characteristics are seriously ***,this paper intends to explore the internal effects of eddy current loss of the rotor on the temperature rise and thermal deformation of ***,the 2D magnetic flow coupling mathematical model of MLDSB is established,and the eddy current loss distribution characteristics of the rotor are numerically simulated by Maxwell ***,the internal influence of mapping relationship of structural operating parameters such as input current,coil turns and rotor speed on rotor eddy current loss is revealed,and the changing trend of rotor eddy current loss under different design parameters is ***,the eddy cur-rent loss is loaded into the heat transfer finite element calculation model as a heat source,and the temperature rise of the rotor and its thermal deformation are simulated and analyzed,and the influ-ence of eddy current loss on rotor temperature rise and thermal deformation is ***,the pressure-flow curve and the distribution law of the internal flow field are tested by the particle image velocimetry(PIV)*** results show that eddy current loss increases linearly with the in-crease of coil current,coil turns and rotor *** effect of rotational speed on eddy current loss is much higher than that of coil current and coil *** maximum temperature rise,minimum temperature rise and maximum thermal defo

关键词： magnetic-liquid double suspension bearing(MLDSB) oil film thickness cur-rent loss thermal deformation particle image velocimetry(PIV)test

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