| Mineral resources are the important parts for national strategic resources. With the increasing requirement of exploring, exploiting, and mining for deep mineral resources, mining in our country approaches to the deep constantly. Mine hoist equipment is the main device to convey the mineral resources from the deep mines to ground, it not only require favorable hoisting capacity, but also demand enough safety. Nowadays, our country has much experience in designing and manufacturing mine hoist device which used in mines with depth less than 1,000 meters. But if the mines' depth is more than 1,500 meters, the traditional winding hoist will need ropes with huge diameter and drum with huge diameter also, and the rope's stress amplitude will be so large that cause premature fatigue for the mine friction winder. So, both of them could not satisfy the challenge of high-spend, heavy-load, efficiency, and safety for the ultra-deep mine hoist. This paper aim at the structure of main spindle device of the ultra-deep mine hoist. Fixed modes for ropes on the drum were analyzed contrastively, and the layout form for rope race was optimized by changing the race location. Effect of drum structure on multipoint lifting and multilayer winding ropes' lifting synchronization was analyzed, and solutions to decrease the discordant value were given. The discrete finite element method was improved to calculate internal force of ropes under extrusion and impacting.This paper consists of the following five parts:(1) It has several different fixed modes for ropes on the race, having great influence on the mechanics behavior of main shaft during lifting process. Utilizing the finite element method to analyze strengths and stiffness of the shaft, the correctness of right fixation on the both drums for hoists which have double drums was proved. Then the shaft, using on the ultra-deep hoist with double ropes and multilayer winding, was analyzed using the same method. The results show that ultra-deep hoist should form right fixation.(2) It has several different designing widths and locations for race on the drum. Utilizing the finite element method to analyze the deformation extreme value of the shaft under symmetrical and non-symmetrical race forms, it show that non-symmetry, more rope race at inside between the end plates and sternum are the optimal forms.(3) Aiming at the characteristics of multipoint lifting and multilayer winding on the ultra-deep mine hoist, the ropes' tension coefficient by cycles and layers was deduced, and the coupling deformation model of ropes and drum during lifting was built. The results show that winding by layers has more affection on ropes' tension coefficient than cycles.(4) The deformation of the drum of ultra-deep mine hoist causes the ropes' discordance. The cause of ropes' discordance was studied, combining the theory with simulation, the variation curve of ropes' discordant value was obtained. To ensure ropes' synchronization, the effective scheme to decrees discordant value was proposes perspective from the drum's structure.(5) For analyzing the ropes extrusion behavior in the race and impacting behavior during high-spend winding, the discrete finite element method was built to calculate the internal stress of ropes. The explicit dynamics finite element method was used to simulation the simplified rope model. |
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