Mine-hoist constant deceleration safety braking system and braking method thereof

Abstract

The invention discloses a mine-hoist constant deceleration safety braking system and a braking method thereof, and relates to the technical field of mine-hoist safety braking control. The system comprises a disk brake, a hydraulic station, an electric control device and a detection feedback device which are arranged on a drum brake disk, wherein a speed sensor arranged on the drum acquires a hoist deceleration signal and inputs the hoist deceleration signal into the electric control device; the electric control device receives the signal and compares the signal with the given speed value to send out a control command; after the control command is processed into an electric signal and compared with an oil pressure signal which is fed back by a pressure sensor on the hydraulic pipeline arranged between the outlet end of an electrohydraulic proportion reversing valve and the disk brake cylinder, an electric signal control command is sent out; and the electrohydraulic proportion reversingvalve of the hydraulic station outputs a hydraulic pressure signal, which varies as the input control command varies, so as to control the motion state of the hoist by the disk brake, thereby realizing constant deceleration safety braking of the mine hoist.

Description

[0001] technical field [0002] The invention relates to the technical field of safety braking control of a mine hoist, in particular to a constant deceleration safety braking system of a mine hoist and a braking method thereof. [0003] Background technique [0004] 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 mine. Its performance is very important for mine safety production. The braking system of the mine hoist is a key component related to the safety performance of the hoist. [0005] Safety braking refers to the braking behavior of the hoist or hoisting winch to stop quickly in order to avoid safety accidents during operation. The safety braking process of the hoist is mainly completed by the electro-hydraulic braking system, wherein the electro-hydraulic braking system is composed of a disc brake, a hydraulic station, an electric control...

AI Technical Summary

Problems solved by technology

For the sake of safety, P 一级 value, that is, the maximum braking torque requirement, so that the maximum braking torque can only be used to brake under the heavy load lifting condition; since the gravity load direction is to help the lifting system brake at this time, it is different from the heavy load Compared with the lowering condition, the brake deceleration changes greatly under the heavy load lifting condition, the braking impact is large, and the braking process is not stable. The same phenomenon also exists under the load change of the lifting system

Especially for large multi-rope lifting equipment, it is easy to break through the sliding limit during the safety braking process, causing the wire rope to slip, reducing the safety performance and service life of the equipment, and even causing major safety accidents

[0007] At present, some imported mine hoists use constant deceleration electro-hydraulic braking control system, and electro-hydraulic servo valves are used to adjust the system oil pressure during the safety braking process of the hoist, but the anti-pollution ability is poor, the cost is high, and the maintenance workload is heavy. , low reliability

If there is a slight negligence in equipment maintenance, major safety accidents may occur during safe braking

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