Multi-channel anti-impact intelligent constant deceleration hydraulic braking system

Abstract

The invention discloses a multi-channel anti-impact intelligent constant deceleration hydraulic braking system. The invention relates to the field of mine hoisting system safety brake control. Technical key points are that: the system comprises a brake loop formed by a constant deceleration hydraulic system, a constant deceleration electric closed-loop control system and a detection feedback device, the constant deceleration hydraulic system is provided with N + 1 groups of independent and complete oil return channels, N is a positive integer greater than or equal to 3, and each group of oil return channels are arranged in parallel to form a parallel independent brake loop. Each oil return channel comprises a standby oil source, an electro-hydraulic signal conversion and amplification element, a working condition switching device and an execution element which are connected in sequence. Each oil return channel comprises a group of standby channels and N groups of working channels, andthe system can safely and reliably complete the functions of constant deceleration braking, impact vibration limitation, rope slipping prevention, car sliding prevention, overwinding prevention and the like when a mine hoisting system normally stops, works and safely brakes, and has the advantage of greatly avoiding the accident rate.

Description

technical field [0001] The invention relates to the field of safety braking control of a mine hoisting system, more specifically, it relates to a multi-channel anti-impact intelligent constant deceleration hydraulic braking system. Background technique [0002] 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. Once the brake fails during operation, 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 . Safety braking refers to the braking behavior of the hoist or hoisting winch to stop quickly in order to avoid safety accidents during ope...

AI Technical Summary

Problems solved by technology

It can be seen that the pressure loop in the "pressure-speed" double closed-loop control method cannot well guarantee the effect of constant deceleration braking, and adding one more closed loop to the closed-loop control system will inevitably increase the complexity of the system and reduce the reliability

On the other hand, the invention adopts the parallel connection of the backup circuit and the working circuit (that is, the common output point). When the common output point fails, it will cause the failure of the entire hydraulic braking system, and finally cause the braking failure of the mine hoist, A security incident occurred

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