Duplex pickaxe type cutting tooth holder of drum shearer

Abstract

The invention relates to the field of coal-cutting machinery, and particularly relates to a duplex pickaxe type cutting tooth holder of a drum shearer. The lump coal rate, the powdered coal quantity, the cutting tooth specific energy consumption and the like are influenced by a geometric construction and a spatial arrangement of an existing pickaxe type cutting tooth holder. The invention provides a novel tooth holder, which is capable of being simultaneously provided with two pickaxe type cutting teeth and can be arranged in a parallel, outwards inclining or inwards inclining manner along a spiral blade, and is directly welded on a spiral drum through a tail handle according to a certain principle. Under the condition that structure parameters and cutting tooth quantities are same, the quantity of cutting teeth distributed on the blade of the spiral drum can be reduced so that the unit area of the cutting teeth acting on the coal petrography is large. The duplex pickaxe type cutting tooth holder has the beneficial effects that the coal petrography is crushed by adopting the pickaxe type cutting teeth of the duplex pickaxe type cutting tooth holder, a gap between every two adjacent cutting teeth can be increased to ensure that the coal cutting capacity is enhanced and the unit area of the cutting teeth acting on the coal petrography can be increased, the grinding force on the contact surface is reduced, the lump coal rate is increased, the powdered coal quantity is reduced, and the unit cutting energy consumption is lowered.

Description

technical field [0001] The patent of the present invention relates to the key parts of cutting or crushing mineral equipment in the coal mining machine, in particular to a part for fixing the cutter for cutting or crushing coal rocks. Background technique [0002] The single pick tooth seat has been widely used in the drum shearer equipment produced in coal mines to fix the pick pick. The single pick tooth seat is directly welded on the outer surface of the drum with a helical distribution according to a certain rule. Driven by the power mechanism, the pick pick can cut coal and rock. Therefore, the geometric structure and spatial layout of the pick seat directly affect its rock breaking ability, cutting efficiency, lump coal rate and service life of other parts. The pick-shaped pick holder is mainly forged from bar stock, and the conventional pick-shaped pick holder is a single-joint pick holder; the pick-shaped pick is assembled on the pick holder and passed through the r...

AI Technical Summary

Problems solved by technology

The most basic requirements for the performance of the tooth seat: the tooth seat used to install the pick pick is directly welded on the outer surface of the drum with a helical distribution according to a certain rule. Whether the structure is reasonable or not and the quality is good or bad will directly affect the Considering the specific energy consumption of the pick, the lump coal rate, the amount of pulverized coal, and the cutting efficiency, the tooth holders of the pick-shaped picks are all in the form of single-joint tooth holders, which are distributed between the two adjacent sections of the helical blade. The unit area of ​​tooth action coal rock is small, resulting in enhanced rolling and friction on the contact surface, resulting in large unit energy consumption and large amount of pulverized coal

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