Thin coal seam coal mining machine drum

Abstract

The invention discloses a thin coal seam coal mining machine drum composed of an end plate, a spiral blade, a drum hub, cutting teeth, tooth holders and the like; the diameter of the drum hub is increased from the drum bottom to the end plate in a hyperbolic sine mode, an included angle of the section of the spiral blade with an inner cylindrical surface of the drum hub is not a right angle, a coal facing face of the spiral blade is cambered in shape, the tooth holder of each cutting tooth is mounted on the coal facing face of the spiral blade by a bolt fixing manner, and only an alloy head part of each cutting tooth exposes outside the spiral blade enveloping scope. According to the drum, according to motion and distribution rules of coal bodies in the loading and transportation process, main reasons of wear failure of the current drum are combined, and a special drum hub contour line, the cambered surface deflection spiral blade and the detachable cutting teeth and tooth holders are combined, so that the drum coal loading rate is increased by more than or equal to 20%, the drum life is increased by more than or equal to 6%, and the drum is suitable for mining of thin coal seams with the coal seam thickness of less than 1.3 m and the strike pitch of less than 20 DEG. The drum has the advantages of compact structure, convenient use, good coal loading effect and long service life.

Description

technical field [0001] The invention relates to a thin coal seam shearer drum, which belongs to the technical field of underground mining equipment and is suitable for thin coal seam mining of 0-1.3m. Background technique [0002] my country's thin coal seams are widely distributed and have large reserves, and the proven reserves account for as much as 20% of the total coal reserves. With the consumption of coal resources in my country and the reduction of medium-thick coal seams, the mining of thin coal seams has caused major domestic mining groups. highly valued. The thickness of the thin coal seam in my country is small, and the diameter of the shearer drum that can be used is small. If the previous shearer drum style is used, the blade depth is greatly limited, the coal storage space in the drum is small, and the coal loading rate of the drum is far away. It is far lower than the drum of the medium-thick coal seam shearer, and the unloaded coal becomes floating coal in th...

AI Technical Summary

Problems solved by technology

This type of thin coal seam drum has poor coal loading performance and cannot be repaired underground after the tooth seat is worn, so it is not suitable for coal mining in thin coal seams

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