Hydraulic-mechanical combined baking system for articulated explosion-proof vehicle in coal mine

Abstract

The invention belongs to the technical field of underground auxiliary transport equipment in coal mines, and particularly relates to a hydraulic-mechanical combined baking system for an articulated explosion-proof vehicle in a coal mine. The hydraulic-mechanical combined baking system comprises a hydraulic torque converter connected with the rear part of an engine, the hydraulic torque converter is connected with a gear box through an upper transmission shaft, front output of the gear box is connected with a front axle through a front axle transmission shaft, the two ends of the front axle areconnected with two wet service brakes correspondingly, rear output of the gear box is connected with a connecting flange of a hydraulic retarder braking device through an articulated transmission shaft, the connecting flange of the hydraulic retarder braking device is connected with a rear axle through a rear axle transmission shaft, the two ends of the rear axle are connected with two service brakes correspondingly, a wet parking controller is arranged on a second shaft of the gear box, the four wet service brakes on the front axle and the rear axle are connected with a mechanical braking service braking control valve and a switching valve through hydraulic controlling pipelines correspondingly, the switching valve is connected with a hydraulic braking control system, and the hydraulic retarder braking device is connected with a gas 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 coal mine articulated explosion-proof vehicles. 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. Generally, the slope is less than 10°, and the transportation distance does not exceed 500m. Howe...

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Problems solved by technology

[0004] In order to solve the problem that the existing coal mine articulated explosion-proof vehicles only rely on single mechanical friction braking, 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 friction heat of the brake cannot be taken away in time. As a result, the brakes frequently have problems such as overheating, seal failure, oil leakage, excessive wear of friction plates, and reduced braking performance. A hydraulic-mechanical combined braking system for coal mine articulated explosion-proof vehicles is provided.

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