Abstract
Since lateral stiffness of existing wire ropes used as guide cables is difficult to achieve reliable guidance for conveyances in deep shaft wall, deflection-suppressed system is designed to reduce lateral displacement and enhance stiffness of guide cables. Theoretical method about cable stiffness is offered with multi-boundary constraints and validated by finite element method. With application analysis, the results show the lateral displacement and stiffness regulation under different boundary conditions. When guide cable tensions increase, the minimum lateral stiffness increases rapidly and later tends to vary linearly with two boundaries constrained, and its situation gradually moves to the middle. Besides, the increased boundaries lead to an increase in the minimum lateral stiffness by a certain linear ratio and the move of its position to the middle on the cable. The required minimum tensions at different boundaries are accordingly obtained. When the guide cables are arranged in different directions of the conveyance, their stiffness characteristics are revealed. Therefore, the arrangement of the two guide cables is proposed under multi-boundary constraints. The above study can be useful for reducing the conveyance deflection in cable-guided system and provide reference when selecting guide cable with multi-boundary constraints.
Highlights
Cables are used in many areas, such as elevator hoist, heavy transportation, and mine hoist
Many of them are utilized for hoisting cables, while cables in mine shaft are used for the guidance of hoisting conveyances, such as ultra-deep mine shaft construction and established deep shaft towers, because rope guides have remarkable advantages than steel guides in economic benefits for long distance transport.[1]
Deflection suppression system consists of two symmetrical four-bar mechanisms and one electromagnet system. They are connected by three cables, and the four-bar mechanisms can realize the synchronous motion through the operation of electromagnet system controlled by control system
Summary
Cables are used in many areas, such as elevator hoist, heavy transportation, and mine hoist. Jian et al.[4] calculate rope stiffness according to force balance principle and made comparative analysis with the stiffness equation in the work by Greenway.[2] Wang et al.[5] regarded the middle of guide cable as the point of minimum stiffness and tested the stiffness at this point through a testing device. This approximate method is not accurate to obtain the minimum stiffness. Guide cables and boundaries can be arranged or designed reasonably according to the conclusions
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