Hydraulic-mechanical combined braking system for integral explosion-proof vehicle of coal mine

Abstract

The invention belongs to the technical field of coal mine underground subsidiary transportation equipment, and particularly relates to a hydraulic-mechanical combined braking system for an integral explosion-proof vehicle of a coal mine. The rear part of an engine is connected with an explosion-proof clutch, the rear part of the explosion-proof clutch is connected with a gearbox, the gearbox is connected with a hydraulic retarding braking device through a front transmission shaft, the hydraulic retarding braking device is connected with a rear axle through a rear transmission shaft, the two ends of a front axle and the two ends of the rear axle are connected with two wet-type traveling and parking integrated brakes respectively, a heat exchanger of the hydraulic retarding braking device isconnected with a radiator through a cooling liquid pipe, and water is supplemented for the radiator through an expansion water tank; and the wet-type traveling and parking integrated brake is connected with a mechanical braking parking braking control valve and a mechanical braking traveling braking control valve through hydraulic control pipelines, the wet-type traveling and parking integrated brake is further connected with a switching valve through a hydraulic control pipeline, the switching valve is connected with a hydraulic braking control system, and the hydraulic retarding braking device is connected with an air source through a pneumatic control valve and a pneumatic control pipeline.

Description

technical field [0001] The invention belongs to the technical field of underground auxiliary transportation equipment in coal mines, and in particular relates to a hydraulic-mechanical combined braking system for integral 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 ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing integrated explosion-proof vehicles in coal mines only rely on a single mechanical friction brake, under the condition of long-distance and large-slope operation, continuous braking causes the temperature of the brake oil to rise too fast, and the brake friction heat cannot be taken away in time. As a result, the brakes frequently have problems such as overheating, seal failure and oil leakage, excessive wear of friction plates, and reduced braking performance. A hydraulic-mechanical combined braking system for coal mine integral explosion-proof vehicles is provided.

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