【摘要】 针对轴承轴向加载试验中当试验轴承外圈与滚子发生高温胶合时,现有的轴承试验机中所使用的轴向加载装置不能及时与试验轴承分离进而损坏试验装置的问题,设计了一种磁性离合机构。基于永磁体的等效磁荷模型,分别建立了磁性离合机构中永磁体在三种布置方式下的三维静态及瞬态磁场解析式;应用MATLAB以及Ansoft Maxwell电磁分析软件分别计算了在这三种布置方式下试验轴承处的磁感应强度;并对这三种布置方式下永磁体所产生的磁力进行了仿真计算及测量。结果表明永磁体在成对垂直布置时所产生的磁力提高了150%左右,试验轴承处的磁感应强度降低了67%左右;即该布置方式在提供可靠轴向力的同时,有效地减小了试验轴承被磁化的影响。更多还原

【Abstract】 In the bearing axial load test, when the outer ring of the test bearing is glued to the roller at high temperature, the axial load device used in the existing bearing test machine cannot be separated from the test bearing in time, resulting in the damage of the test device, a magnetic clutch mechanism was designed.Based on the equivalent magnetic charge model of the permanent magnet, the three-dimensional static and transient magnetic field analytical formulas of the permanent magnets in the magnetic clutch mechanism under three arrangements were established.Used MATLAB and Ansoft Maxwell electromagnetic analysis software to calculate the magnetic induction intensity at the test bearing under the three arrangements, and the magnetic force generated by the permanent magnet under these three arrangements were simulated and measured.The results show that when the permanent magnets was arranged vertically in pairs, the magnetic force generated was increased by about 150%,and the magnetic induction intensity at the test bearing was reduced by about 67%;and this arrangement can effectively reduce the influence of magnetization of the test bearing while providing reliable axial force.更多还原