Control system for hydraulic-mechanical combined braking of explosion-proof vehicle in coal mine

Abstract

The invention belongs to the technical field of combined braking control technologies for explosion-proof vehicles in coal mines, and particularly relates to a control system for hydraulic-mechanicalcombined braking of an explosion-proof vehicle in a coal mine. The control system comprises a mechanical braking control system and a hydraulic braking control system. The mechanical braking control system comprises a series double-loop braking valve, an energy accumulator I, an energy accumulator II, a prefill valve, a hydraulic pump, a one-way valve I, a parking braking valve, a manual pump anda safety valve. The hydraulic braking system comprises a gas storage tank, a safety valve, a knob switch valve, a gear control valve, a liquid-air proportional pressure reducing valve, a one-way valveII, a one-way valve III, a pressure regulating valve I, a pressure regulating valve II, a shuttle valve I, a shuttle valve II, a control valve, an oil-gas separating device, an exhaust pipe, an exhaust valve, a retarder and an oil pool. According to the control system, hydraulic braking and mechanical-hydraulic combined braking control can be switched, the reliability of vehicle braking and vehicle operation safety are improved, and safety accidents of the vehicle are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of combined braking control of explosion-proof vehicles in coal mines, in particular to a hydraulic-mechanical combined braking control system for explosion-proof vehicles in coal mines. Background technique [0002] With the rapid development of mining technology in my country, the mining area of ​​near-horizontal coal seams is gradually decreasing, and the inclined coal seams are gradually increasing, which makes the driving slope and ramp distance of trackless auxiliary transport vehicles gradually increase. At present, the explosion-proof vehicles used for auxiliary transportation in coal mines are divided into articulated explosion-proof vehicles and integral explosion-proof vehicles according to the frame type. The power transmission mode and braking system of the two types of vehicles are different, and the integral explosion-proof vehicles use an integrated frame. Generally, the slope is less than 10...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of relying on a single mechanical friction brake, under the above-mentioned long-distance and large-slope conditions, the oil temperature will rise too fast during braking, and the friction heat of the brake cannot be taken away in time, so that the brake frequently overheats and seals. In order to solve the problems of oil leakage due to failure, excessive wear of friction plates, and decreased braking performance, a hydraulic-mechanical combined braking control system for underground explosion-proof vehicles in coal mines is provided.

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