Abstract: In order to suppress the longitudinal vibration of the mine hoisting system,a longitudinal vibration-damping suspension device based on magnetorheological damper was designed. Firstly,a magnetorheological damper mechanical model was established,and the structural design and magnetic circuit design of the vibration-damping suspension damper were carried out; secondly,a multi-physical field coupling model of the magnetorheological damper was established based on the multi-physical field simulation software COMSOL,and the internal magnetic field,the flow field and the pressure distribution conditions were analyzed in the flow-solid coupling environment of the electromagnetic field and the flow field to validate the reasonableness of the design of the mechanical structure and the distribution of the magnetic circuit; and then,through the dynamic simulation of coupled electromagnetic field,flow field and force field,the relationship between the damping force F and displacement x,frequency f,amplitude A,current I and damping adjustable coefficient β under sinusoidal excitation of the magnetorheological damper was obtained; the simulation results show that,in the range of operating current from 0~1.4 A,the maximum damping force of the designed magnetorheological damper was 4 993 N,and the maximum damping adjustable coefficient was 9.97. Finally,the trial prototype verifies that the designed magnetorheological damper can provide the required damping force for the vibration-damping suspension device to achieve the suppression of longitudinal vibration of the mine hoisting system.

Key words: mine hoisting, longitudinal vibration, magnetorheological damper, multiphysics field coupling, dynamics simulation