A Consistency Control Method for Multiple Brakes of Mine Hoist

Abstract

The invention discloses a mine hoist multi-brake contacting brake action consistency control method. The method comprises the steps of making an improvement on a high-speed and heavy-load mine hoist disk brake control mode, and controlling each disk brake through an independent electro-hydraulic proportional directional valve; ensuring the consistency of contacting brake actions of multiple disk brakes by artificially presetting the same contacting brake time in a disk brake position closed-loop control mode; and detecting the wear extent of brake shoes in real time, correcting contacting brake fuel supply pressure control values of the disk brakes through the wear extent, making pressing force of all the disk brakes finally acting on the contact surfaces of the disk brakes the same in a pressure closed-loop control mode, and ensuring the consistency of the contacting brake pressure of the multiple disk brakes. The mine hoist multi-brake contacting brake action consistency control method provided by the invention is simple, reliable, convenient to operate, high in adaptability, high in control performance and good in using effect and has the wide practicality.

Description

technical field [0001] The invention belongs to the technical field of mine hoists, and in particular relates to a method for controlling the consistency of brake affixing actions of multiple sets of brakes of a mine hoist. Background technique [0002] The mine hoist is responsible for the transportation of mine materials, underground equipment and operators. It is the throat of mine production. As the last and most critical safety equipment of the hoist, the braking system is an indispensable and important part of the hoist. Whether the braking system can work safely and effectively is directly related to the safe operation of the hoist, which has an important impact on the production of the entire mine and even the safety of personnel. [0003] With the continuous increase of the operating speed and hoisting load of the mine hoist, multiple sets of disc brakes are required to brake simultaneously to ensure the safety of the braking process. During the working process of ...

AI Technical Summary

Problems solved by technology

This control method has the following problems: ①Although the parameters of each disc brake are the same in theory, due to factors such as the length of the hydraulic pipeline, the wear of the brake shoe, and the difference in the response characteristics of the disc brake, only the oil pressure of the brake oil supply chamber is guaranteed. Same, it will lead to inconsistencies in the time when the brake shoes of each brake reach the contact surface of the brake disc, and it is impossible to guarantee the consistency of the braking movement of multiple brakes; , under the same oil supply pressure, the pressing force acting on the contact surface of the brake disc will be different, and the consistency of the pressing force acting on the brake disc by multiple brakes cannot be guaranteed

The existence of the above problems will further increase the difference in the wear of each brake shoe, leading to premature failure of some disc brakes, which in turn reduces the effective braking torque and greatly increases the hidden danger of braking safety.

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