Hob cutter type coal cutter drum

Abstract

The present invention relates to a hob type shearer roller which is particularly fit for the exploration of a gangue coal bed and a harder coal bed. The hob type shearer roller comprises a cylinder hub, spiral vanes and an end plate which are arranged on the cylinder hub, cutting picks on the spiral vane, a pick holder and end plate cutting picks. The diameter of the spiral vane is increased gradually from the end plate. The diameter of the spiral vane is maximal at the middle position of the cylinder hub and then is reduced gradually. The diameter of the spiral vane at the two ends of a cylinder body is equal to the diameter of the end plate. The cutting pick elevation angle at the position of the maximal diameter of the spiral vane is zero, and the rest cutting picks incline for certain degrees towards the two sides on the boundary; the cutting picks at the side of the end plate incline towards the end plate; the cutting picks at a goaf side incline towards the goaf side; the whole structure of the roller is the hob type. The roller uses the characteristic that coal rock can resist pressure but can not resist pull, except the cutting picks at the position of the maximal diameter of the spiral vane, the rest cutting picks are all arranged slantways; the cutting picks at the position of the maximal diameter of the spiral vane of the roller are that the cutting picks at the two sides cut a free surface, thereby not only improving the cutting efficiency but also improving the efficiency of cutting range coal.

Description

technical field [0001] The invention relates to a coal shearer drum, in particular to a hob-type coal shearer drum suitable for mining gangue coal seams and relatively hard coal seams. 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 consumption and service life of the coal machine, so i...

AI Technical Summary

Problems solved by technology

The shearer drum currently used in our country has the same diameter at the tips of all the picks. Although the picks are in relatively good stress condition, their rock-breaking ability is not strong, the cutting energy consumption is large, and they are not very good. Utilize the characteristics of coal and rock in compression but not in tension

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