Effect of drum structure of double rope multi layer winding hoist on wire ropes’ tension difference

The guarantee of the winding synchronization of the wire ropes in the ultradeep mine winding hoist plays an indispensable role in the safe and reliable operation of its system.Aiming at the wire ropes’ tension difference caused by the unsynchronized winding deformation between the two rope areas of the drum,the interaction between the length and tension of the two ropes was considered,the beam on elastic foundation theory was used to derive the radial deformation equations of the thickshell with elastic supporting wheel drum under different stress conditions,and then the coupling calculation model of the wire ropes dynamic tension,the wire ropes’ tension difference and the drum deformation were established.By calculating the wire ropes’ maximum tension differences of different drum structures during winding,the influence law of the different wire ropes’ fixation modes and the positions of the supporting wheels on the wire ropes’ tension differences were summarized.The correctness of the theoretical calculation model was also verified by finite element analysis software.The results show that the drum structure has a great influence on the synchronization of doublerope multilayer winding wire ropes.The unreasonable combinations of wire ropes’ fixation modes and the positions of the supporting wheels will cause the wire ropes’ tension difference to exceed 10%,which will endanger the operation safety of the lifting system.The winding synchronization of the wire ropes in the leftright and rightleft wire ropes’ fixation modes is the same when the distances of the left supporting wheel to the left wire rope fixing hole and the right supporting wheel to the right wire rope fixing hole are correspondingly equal.The winding synchronization of the wire ropes in the leftleft and rightright wire ropes’ fixation modes is the same when two supporting wheels symmetrically arranged.The drum structures with the smallest wire ropes’ tension difference is leftright or rightleft wire ropes’ fixation mode with two supporting wheels symmetrically arranged.