Roller for mixed row cutting tooth coal winning machine

Abstract

The invention relates to a roller for a mixed row cutting tooth coal winning machine. The roller comprises a roller hub, an end disk, pickaxe-shaped cutting teeth and a square connecting sleeve, wherein the roller hub is trapezoidal; the roller hub is provided with a diameter-variable helical blade; the front part of the diameter-variable helical blade is provided with 1 to 2 rows of pickaxe-shaped cutting teeth arranged in a checkerboard way, while the rear part is provided with a plurality of disk cutter devices arranged in the checkerboard way; and the disk cutter devices comprise an upperconnecting block, a lower connecting block and disk cutter cutting teeth; the upper connecting block and the lower connecting block are welded on the diameter-variable helical blade; and the disk cutter cutting teeth, the upper connecting block and the lower connecting block are integrated into a whole through bolts. According to the characteristics of compression resistance and low tensile resistance of coal beds, different axial coal dropping amounts along the roller, the gradual diameter change of the blade and the trapezoidal appearance, the coaling effect of the roller is improved by about 15 percent compared with that of the conventional cylindrical roller, and the lump coal cutting rate is improved by 7 percent; and the roller is suitable for mining low coal beds with the coal bed thickness of below 1.3m and the dip angle of between 0 and 25 degrees. The roller has the advantages of simple and compact structure, convenient operation, good cutting effect, good coaling effect andhigh rock breaking ability.

Description

technical field [0001] The invention relates to a pick mixed row type shearer drum, which is especially suitable for the mining of thin and extremely thin coal seams with a thickness of less than 1.3m and an inclination angle of 0-25°. Background technique [0002] With the changes in the form of coal mining in our country, the requirements for the working mechanism of the shearer have also undergone great changes. my country's coal mining is gradually shifting from thick and medium-thick coal seams to thin coal seams and gangue coal seams and other difficult-to-mining coal seams. At the same time, higher requirements are put forward for the reliability, coal cutting efficiency, rock breaking capacity and structural layout of the shearer drum. . The shearer drum undertakes the functions of cutting and transporting coal rocks and spraying dust, and its power consumption accounts for 80-90% of the installed power of the entire coal mining machine. The productivity, energy con...

AI Technical Summary

Problems solved by technology

The coal loading effect of this kind of drum is poor, and the rock-breaking ability is insufficient, so it is not suitable for use in gangue and hard inclusion coal seams.

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