永磁悬浮带式输送机侧向力与跑偏问题

针对永磁悬浮带式输送机侧向稳定性问题,对平型、V型及槽型三种悬浮支撑结构进行研究。建立了三种悬浮系统的三维简化模型。基于FEM(finite element method)对悬浮力和侧向力进行有限元解析。结果表明,槽型结构承载能力和侧向防跑偏综合性能最好。将不同气隙情况下槽型结构侧向受力等效为磁力弹簧,拟合得到磁力弹簧动态载荷和刚度表达式,完成非线性弹簧一阻尼振动系统仿真。槽型结构悬浮系统在非平衡位置开始运动,在平衡位置附近振动,振幅逐渐减小,最终达到侧向平衡。结果表明,槽型永磁悬浮装置具有侧向自动回正调整功能。为永磁悬浮带式输送机结构设计及参数选择提供了参考。

Study on Lateral Force and Deviation of Permanent Magnet Suspension Belt Conveyor

Aiming at the lateral stability of the permanent magnet suspension belt conveyor, three suspension support structures of flat type, V type and trough type were studied. Three simplified models of three suspension systems were established, and FEM was used to analyze the levitation and lateral forces. The results show that the synthetical performance of the groove structure is the best. The lateral force of groove structure under different air gap was equivalent to magnetic spring. The expression of dynamic load and stiffness of magnetic spring was obtained by fitting and a nonlinear spring-damping vibration was simulated. The suspension system of groove structure started to move at the non-equilibrium position, oscillated near the equilibrium position, decreasing amplitude and ended up with a lateral equilibrium. The results show that the fluted permanent magnetic levitation device has the function of lateral automatic correction. Reference is provided for structural design and parameter selection of permanent magnet suspension belt conveyor.