含永磁体电磁式在线主动平衡装置自锁磁场有限元分析

转子不平衡是旋转机械的常见故障,严重影响机器的安全稳定运行。为了通过在线无人干预方式治理转子不平衡,需要设计高品质的在线主动平衡装置。能否简单又可靠地保持平衡状态是在线主动平衡装置设计的关键问题之一,为此提出一种含永磁体的电磁平衡装置,通过永磁力来实现平衡状态的保持。设计中,磁场分布和磁通密度的合理设计是基础问题。在结构设计和永磁体选型分析的基础上,采用有限元分析方法建立了电磁平衡装置的自锁磁场分析模型,依次对永磁体性能、尺寸和气隙对磁场分布和磁密大小的影响进行研究,获得了基于自锁性能的电磁参数初步设计范围。研究工作为含永磁体电磁平衡装置的自锁性能设计、评价和优化提供了必要基础。

Self locking Magnetic Field Finite Element Analysis of Online Active Electromagnetic Balancing Device with Permanent Magnet

Rotor unbalance is the common fault of rotating machinery,it affects the safe and stable operation of machine.In order to reduce rotor unbalance online and without human intervention,the high-quality online active balancing device is important.The balanced condition should be kept by simple and reliable means.An electromagnetic balancer with permanent magnet was proposed,the permanent magnets were used to accomplish the balancing condition maintaince.In balancer design,magneitc field distribution and flux density were main invaluation indicators.Based on structural design and magnet choice,the self-locking magnetic field FE model was built,and then the influences of magnet performance,size and air gap on magnetic field were studied,based on the results the reasonable parameters were chosen.This work provides the base for new electromagnetic balancer design,assessment and optimization.