A kind of oil cylinder walking type thin coal seam shearer

Abstract

The invention discloses a cylinder stepping type thin seam coal mining machine. The thin seam coal mining machine is applied to an extremely thin seam of which the thickness is less than 0.8m, and the inclination angle is 0 to 35 degrees. The thin seam coal mining machine mainly comprises a left roller, a left rocker, a pumping station, a gap bridge, a middle box, a right rocker, a running mechanism and a right roller, wherein the hydraulic pumping station comprises an anti-explosive motor, a speed increaser, a gear pump, a constant power variable pump, a cooler, a coarse filter, a fine filter and explosion-suppression electromagnetic directional valves; the running mechanism comprises thrust cylinders, a pin shaft, a check ring, a guide sliding shoe, a wedge-shaped block I, a wedge-shaped block II, locking cylinders, angle steel and a spring; the anti-explosive motor drives a dosing pump and a variable pump; and the hydraulic pump drives the running mechanism through the explosion-suppression electromagnetic directional valves to make the coal mining machine run. The thin seam coal mining machine is braked by inserting the three locking cylinders into a pin rail simultaneously, so that the thin seam coal mining machine has the advantages that the braking effect is relatively direct and effective compared with the conventional coal mining machine which is braked by a hydraulic brake on a two-section shaft; the height of a machine body can be effectively reduced, the thin seam coal mining machine stably runs and well accords with thin seam coal mining conditions; and the thin seam coal mining machine is simple in structure and easy to maintain, and the interchangeability is high.

Description

technical field [0001] The invention relates to coal mine excavation equipment, in particular to an oil cylinder walking type thin coal seam shearer with a thickness less than 0.8m and an inclination angle of 0-35°. Background technique [0002] my country's thin and extremely thin coal seams are widely distributed and have large reserves. The proven reserves account for as much as 20% of the total coal reserves, while the output only accounts for about 8% of the total output, which is far lower than the proportion of its reserves. All major mining bureaus across the country are facing the problem of thin and extremely thin coal seam mining, especially with the depletion of thick and medium thick coal seam reserves in old mining areas, the problem of thin and extremely thin coal seam mining has become more prominent. Throughout the current situation of coal mining in the country, the mining of thin and extremely thin coal seams is an overall problem that needs to be solved u...

AI Technical Summary

Problems solved by technology

However, at present, the traveling wheels on the traveling part of the coal mining machine carry all the walking resistance and cutting resistance, and because of the use of shifting gears, the number of teeth is generally 6-8, resulting in insufficient tooth root strength and prone to broken teeth; traveling wheels It is very inconvenient to maintain and replace gears when it is fixed on the walking part; the size of the traveling wheel is relatively large, generally between 300~400mm, which makes the body of the shearer high and cannot adapt to the extremely thin coal seam less than 0.8m

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