A supporting cutting section for cross-connecting shaft-type fully mechanized mining in extremely thin coal seams

Abstract

The present invention proposes a cutting part of a fully mechanized shearer for ultra-thin coal seams. The idler gear 3 and the first stage bull gear 4 are arranged at the left end of the main traction part 24 , and the power is transmitted from the traction part 24 to the cutting part 25 through the first spline shaft 5 . The layout of the transmission system of the present invention greatly reduces the external dimensions, and improves the possibility of the cutting part being lifted and lowered when it is matched with fully mechanized mining in the ultra-thin coal seam working face. The second spline shaft 7 of the clutch is stretched by the clutch handle 8, so that the second spline shaft 7 of the clutch can be disengaged from the first spline shaft 5, and the clutch is completed, so that the maintenance of the cutting part is more convenient. Through the external cooling plate 18 in the transfer station, the cooling of the forced lubricating oil can be realized, and the oil temperature in the gear chamber can also be reduced, so as to improve the service life of the shaft and the gear. The entire cutting section has a compact structure and relatively small dimensions, which greatly facilitates its matching in the fully mechanized mining face of extremely thin coal seams.

Description

technical field [0001] The invention relates to a supporting cutting part for cross-connecting shaft type fully mechanized mining of extremely thin coal seams. Background technique [0002] We generally call the coal seam thickness below 1.3m thin coal seam, and the coal seam thickness below 0.8m is more called extremely thin coal seam. my country's thin coal seams are widely distributed, and the coal quality is good, mostly coking coal, with high calorific value. Restricted by geographical conditions, the design of thin coal seam mechanization equipment has always been a difficult problem in the field of coal technology, resulting in the slow development of thin coal seam fully mechanized mining equipment and a very low degree of mechanization. According to statistics, although the reserves of thin coal seams in my country account for more than 20% of the total reserves, the output only accounts for about 3% of the total coal output, and many of the very thin coal seams ar...

AI Technical Summary

Problems solved by technology

Although the cutting part of the traditional coal shearer can realize the lifting of the cutting part, due to the limitation of the structure, the outer dimension of the cutting part is too long and too large, and the space-to-head distance is too large when the traditional cutting part is applied to the working face of extremely thin coal seam. Large, not conducive to protection, making it unable to adapt to the mining of extremely thin coal seams

In addition, the extremely thin coal seam cutting part is limited by space and structure, and the cooling inside the gear cavity is also a big problem. Because the extremely thin coal seam cutting part, especially the ultra thin coal seam cutting part that needs to be fully mechanized, has a small external dimension However, gears and shafts cannot be reduced due to the influence of strength, so the cooling device cannot be used in the gear cavity, and the cooling water channel on the cutting part shell will affect the overall strength of the shell

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