In order to solve the problem of reciprocating seal for hydraulic cylinder, a new structure of Magnetorheological fluid (MRF) reciprocating seal with increasing width of pole teeth and pole piece was designed. The theoretical analysis of MRF reciprocating seal is carried out. The magnetic field intensity distribution in the sealing gap of MRF reciprocating seal was analyzed by finite element method. According to the pressure capability formula of MRF, the theoretical pressure capability is calculated. The influences of structure parameters such as the number of magnetic sources, sealing gap height, pole teeth length, the ratio of permanent magnet height to its length, the ratio of pole piece height to shaft radius on the sealing capabilities were studied. The results showed that the pressure capability of MRF reciprocating seal increases with the increase of the number of magnetic sources and with the decrease of the sealing gap height. With the increase of the pole tooth length, the pressure capability of the reciprocating seal increases. With the increase of the ratio of permanent magnet height to its length, the pressure capability of the reciprocating seal increases first and then decreases. With the increase of the ratio of the pole piece height to shaft radius, the pressure capability of the MRF reciprocating seal increases first and then decreases.

中文翻译：

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磁极流体和磁极往复运动密封件关键参数的数值研究，其宽度随极齿和极靴宽度的增加而增加

为了解决液压缸往复运动密封的问题，设计了一种新的磁流变流体往复运动密封结构，其极齿和极靴的宽度增大。对MRF往复式密封件进行了理论分析。利用有限元方法分析了MRF往复式密封件密封间隙中的磁场强度分布。根据MRF的抗压能力公式，计算出理论抗压能力。研究了磁源数量，密封间隙高度，极齿长度，永磁体高度与其长度之比，极靴高度与轴半径之比等结构参数对密封性能的影响。结果表明，MRF往复式密封件的耐压性能随着磁源数量的增加和密封间隙高度的减小而增加。随着极齿长度的增加，往复式密封件的耐压能力也增加。随着永磁体高度与其长度之比的增加，往复式密封件的耐压能力首先增加，然后降低。随着极靴高度与轴半径之比的增大，MRF往复式密封件的耐压能力先增大后减小。随着永磁体高度与其长度之比的增加，往复式密封件的耐压能力首先增加，然后降低。随着极靴高度与轴半径之比的增大，MRF往复式密封件的耐压能力先增大后减小。随着永磁体高度与其长度之比的增加，往复式密封件的耐压能力首先增加，然后降低。随着极靴高度与轴半径之比的增大，MRF往复式密封件的耐压能力先增大后减小。