Hydraulically-driven thin coal seam coal mining machine

Abstract

The invention discloses a hydraulically-driven thin coal seam coal mining machine. The hydraulically-driven thin coal seam coal mining machine comprises cutting parts, coal mining machine rocking armsand an outer traction walking part, wherein the cutting parts comprise coal mining drums and hydraulic motors; the hydraulic motors are used for supplying power to the coal mining drums; the hydraulic motors are connected with an external variable pump station through hydraulic oil pipes; supercharging devices are arranged on the hydraulic oil pipes; and the cutting parts are rigidly connected with the coal mining machine rocking arms. The large-torque hydraulic motors are connected with the external variable pump station to drive the cutting parts of the coal mining machine, so that the hydraulically-driven thin coal seam mining machine is simple in structure, reasonable in design, free from gear pair transmission, high in reliability, high in startup rate, low in fault rate, and convenient to maintain and repair. According to the hydraulically-driven thin coal seam mining machine, the coal mining drums are hydraulically driven, and the diameters of cutting drums can be miniaturizedin order to adapt to mining under an extremely-thin coal seam geological condition with a mining height range of 0.6m to 1.3m. Variable-speed cutting can be realized through adoption of the hydraulicmotors, and the cutting speed can be automatically reduced while the torque can be increased when the cutting resistance increases, so that stepless speed regulation is realized.

Description

technical field [0001] The invention relates to the technical field of mineral excavation, in particular to a hydraulically driven thin coal seam shearer. Background technique [0002] my country is rich in coal resources, and the storage forms are diversified, especially the thin coal seam resources are mostly distributed widely, accounting for about 20% of the country's coal, with a total reserve of 6 billion tons. However, thin coal seams often have complex geological structures such as faults, folds, large undulations, and many gangue inclusions, and most of them are coal seams below 1.3m. They face difficulties such as narrow mining space, harsh working conditions, and low recovery rate of coal resources. As the core equipment of the fully mechanized mining face, the shearer is difficult to install, operate and maintain due to the limitation of the mining space, and the labor intensity of the workers is high. Therefore, the thin coal seam shearer must have the characte...

AI Technical Summary

Problems solved by technology

At present, the existing thin coal seam shearer mainly has the following problems: the rotating speed of the cutting drum is constant, the mining efficiency is poor, and the lump coal rate is low

There are often mechanical and electrical failures and shutdowns, and the start-up rate is low

The main components of the shearer, such as the cutting part, traction part, and electric control box, have complex structures, high failure rates, and difficult maintenance

Aiming at the problems of low mining efficiency and waste of resources in the complex working face of thin coal seams, it is urgent to develop a thin coal seam shearer with simple structure, convenient operation, high reliability and strong adaptability

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