磁力泵导轴承及平衡用永磁环的研究

Magnetic-force pump sliding bearing and permanent equilibrium magnet ring

磁力泵在运行时经常发生导轴承失效问题,如果将导轴承承受的正压力降低,可以提高磁力泵运行的可靠性。该文首先介绍了设计磁力泵导轴承的基本方法,并以一种卧式磁力泵为模型,通过分析退磁曲线法获得的磁钢能量公式,给出了磁力泵转子在有轴向偏移时,磁力联轴器回复力的计算方法;在转子两端各加装一对异性磁化磁环,将外环预先偏置,产生对转子的托力,理论上托力可以完全平衡转子重量,并使得转子所承受的合力偶为零。研究说明,利用永磁磁环的作用力可以用来平衡转子重量,提高磁力泵导轴承寿命,方案可行。

Sliding bearings often lose efficacy when a magnetic-force pump runs, if positive pressure acting on sliding bearings is reduced, magnetic-force pump reliability can be added a lot. Basic ways of designing sliding bearing are introduced first. A kind of permanent magnet equilibrium horizontal magnetic-force pump model is introduced in this article, the ways of calculating rotor reverting force when the rotor has the axis displacement are analyzed through demagnetization curve. A couple of isomerism magnet rings are equipped on both ends of axial, outer rings are placed biased, the force acts on rotor and balances the gravity of rotor, moment must be zero. The common problem of magnetic-force pump sliding bearings lapse can be solved according to the theories introduced in this article.