Dual-setting value constant torque secondary braking control system of mine hoister

Abstract

The invention discloses a dual-setting value constant torque secondary braking control system of a mine hoister, which is designed to solve the situation that the existing constant torque secondary braking mode cannot cope with the variation of loading directions of the hoister. The system comprises a hydraulic pressure source, a directional control valve and a dual setting valve constant torque secondary braking hydraulic circuit, wherein the hydraulic pressure source comprises a pump and is used for supplying pressure oil to a hydraulic cylinder of a disc brake (3) during the period of the normal working mode; the directional control valve is arranged between the hydraulic pressure source and the hydraulic cylinder of the disc brake so as to realize the switching between the normal working mode and the safe braking mode of the hydraulic circuit; the dual setting valve constant torque secondary braking hydraulic circuit switches to a corresponding safe braking hydraulic circuit according to operational state signals of hoisting or lowering for a hoisting system, provided by an electronic control system, and selects an appropriate braking oil pressure value corresponding to the operational state of the hoisting system so as to brake the roller. The dual-setting value constant torque secondary braking control system of the mine hoister can preferably meet the safe braking requirements of the mine hoisting system under various conditions, thereby improving the braking performance and safety performance of the mine hoisting system.

Description

[0001] technical field [0002] The invention relates to the technical field of mine hoist safety braking control, in particular to a mine hoist double-set value constant torque secondary braking control system. Background technique [0003] The mine hoist is the throat equipment of mine mining, which undertakes the important task of transporting minerals, equipment, materials and personnel between the mine and the underground. Its performance is very important for mine safety production; and the mine hoist braking system is related to the Key components for safety performance. [0004] Safety braking refers to the braking behavior of stopping quickly in order to avoid safety accidents during the operation of the hoist or hoisting winch; the safety braking process is mainly completed by the braking system. [0005] At present, most mine hoists and hoisting winches still adopt a single set value constant torque secondary safety braking control mode, and the first level bra...

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the above-mentioned single set value constant torque braking method cannot fully satisfy the safety braking of the mine hoist and hoisting winch under all working conditions, especially the two extreme conditions of heavy load lowering and heavy load lifting need

That is to say, the existing constant torque two-stage braking method can only brake with the set braking torque under different working conditions, and cannot cope with the change of the load direction of the hoist; for large multi-rope hoisting equipment, the safety mechanism It is easy to break through the sliding limit during the moving process, causing the wire rope to slip; for inclined shaft hoisting, it is easy to cause wire rope overload safety accidents caused by loose ropes, which reduces the safety performance and service life of the equipment, and even causes major safety accidents

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