Synchronous concurrent multi-channel constant deceleration safety braking system and method for mine hoist

Abstract

The invention discloses a synchronous concurrent multi-channel constant deceleration safety braking system for a mine hoist. The synchronous concurrent multi-channel constant deceleration safety braking system comprises braking loops consisting of hydraulic systems, constant deceleration closed-loop electrical control devices and detection feedback devices; the braking system comprises at least two parallel independent braking loops; the same constant deceleration set point command signal is input to the constant deceleration closed-loop electrical control device of each independent braking loop, the constant deceleration closed-loop electrical control device of each independent braking loop receives the same speed feedback signal, and a difference value obtained after the speed feedback signal is compared with the constant deceleration set point command signal serves as an input command of each independent braking loop to control the braking loop; each independent braking loop outputs a hydraulic medium to the same executive component; when any one or a plurality of independent braking loops work, the braking system works. The invention also discloses a safety braking control method for the mine hoist based on the system, so that any one or a plurality of braking loops in the effective working conditions output the hydraulic medium to the executive component to execute hoist drum braking work, and the safety braking reliability is improved.

Description

technical field [0001] The invention relates to the technical field of safety braking control of a mine hoist. [0002] Background technique [0003] Mine hoist is the throat equipment of underground mine mining. It undertakes the important task of transporting minerals, equipment, materials and personnel between the mine and the mine. Its performance is very important for mine safety production. The mine hoisting system has a large load (moving mass can reach hundreds of tons), fast speed (more than 10 meters per second), and a large number of personnel (up to tens to hundreds of people when lifting personnel), once the brake fails, the consequences will be disastrous; Therefore, the braking performance and reliability of the braking system is an important guarantee for the safe production of the mine hoisting system, and the electro-hydraulic braking system is a key part related to the safe braking performance of the hoist. [0004] Safety braking refers to the braking b...

AI Technical Summary

Problems solved by technology

In this way, as long as any one of the circuits fails, the part of the brake controlled by this circuit will fail, and a fraction of the maximum braking force of the entire braking system will be lost, and braking may occur when the maximum braking force is required. failure, resulting in major safety accidents

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