磁力驱动搅拌器的径向刚度特性分析

Analysis of radial stiffness characteristics of magnetic driven agitator

磁力搅拌器搅拌时存在搅拌桨叶径向跳动较大的情况,影响物料的搅拌效果,也会减少搅拌器的寿命。建立了磁力驱动搅拌器的三维模型,并通过Optistruct及Romax有限元分析软件对磁力驱动搅拌器的径向刚度性能进行仿真分析,研究了轴承配置方式对搅拌器径向刚度的影响,在隔离环与外永磁体基座之间采用2种轴承配置方式:(1)采用一对6005深沟球轴承;(2)采用一个6005深沟球轴承和一个3204双列角接触球轴承,得到了较为优化的轴承配置组合(2),与轴承配置组合(1)相比,搅拌轴末端的径向位移下降了26.9%。并分析了隔离环厚度对搅拌轴最大位移、应力和模态的影响,并得到了较为合理的隔离环壁厚参数。

When the magnetic agitator is stirring,the radial runout of the stirring blade tends to be larger,which affects the stirring effect of the material and reduces the service life of the agitator.Therefore,based on the existing equipment,a three-dimensional model of magnetic drive agitator was established,and the radial stiffness properties of the magnetic drive agitator was simulated and analyzed by the Optistruct and Romax finite element analysis software.The influence of the bearing configuration on the radial stiffness of the agitator was studied.It was found that two types of bearing configuration were used between the spacer ring and the outer permanent magnet base.The second configuration is a pair of 6005 deep groove ball bearings,and the first one is a combination of a 6005 deep groove ball bearings with a 3204 double row angular contact ball bearings.The optimized bearing configuration was the first configuration.Compared with the second configuration,the radial displacement at the end of the stirring shaft was reduced by 26.9%.The influence of the thickness of the isolation ring on the maximum displacement,stress and modal of the mixing shaft was analyzed,and the reasonable parameters of the isolation ring wall thickness were obtained.