【摘要】 为了改善液压伺服阀的性能,在伺服阀力矩马达的工作气隙中添加磁流体(M F).基于磁流体具有较大的磁导率以及在外加磁场作用下具有较大磁化强度的特点,提出利用磁流体来改善伺服阀力矩马达的磁路效率以及提高伺服阀动态性能,分别采用二维磁场有限元分析方法及经验公式,研究了添加和不添加磁流体时力矩马达工作气隙中磁场强度特性及力矩马达输出力矩特性,仿真分析结果表明添加磁流体后力矩马达的磁场强度及衔铁输出力矩值有明显改进.更多还原

【Abstract】 Magnetic fluid(MF) was added into the working air clearances of hydraulic servo-valve torque motor to improve the performance of the servo-valve.As magnetic fluid have larger magnetic permeability and bigger magnetization intensity under an external magnetic field,the magnetic circuit efficiency of the torque motor and the dynamic performance of the servo-valve can be improved using the magnetic fluid.Using two-dimensional magnetic finite element and analytical methods,the magnetic field distribution and the torque characteristics of the torque motor were studied with or without magnetic fluid.The simulation results show that the torque characteristics of the torque motor with magnetic fluid improved markedly compared with that without magnetic fluid different.更多还原