Cutting part of a bottom-clearing drum shearer

Abstract

The invention discloses a cutting part of a bottom-clearing roller shearer, each cutting part includes two cutting drums, a first cutting drum (14) and a first cutting drum transmission chamber casing (6) The transition section housing (3) extends to the coal wall (20), and the rear part of the first cutting drum transmission chamber housing (6) extends beyond the middle groove of the scraper conveyor and the groove side (18) of the transition groove, and at the same time The casing (6) of the first cutting drum transmission chamber is bent downward. The first cutting drum of the present invention has enough undercover to avoid the formation of "triangular coal" at the head and tail of the scraper conveyor, and the second cutting drum has a smaller production distance to improve the coal loading effect and ensure sufficient load bearing Strength: Under the same coal mining height, two cutting drums with smaller diameters are selected to be used in pairs to ensure the full height of one-time mining, prolong the service life of the cutting drum, optimize the overall performance of the cutting part, and have good adaptability to changes in coal seam thickness , Reduce costs and process requirements.

Description

technical field [0001] The invention relates to a cutting part of a coal shearer, in particular to a cutting part of a bottom-clearing drum shearer. Background technique [0002] The common coal mining process generally requires a full height at one time. In order to adapt to the mining height range of the shearer, it is usually necessary to increase the diameter of the cutting drum accordingly. However, the larger the diameter of the cutting drum, the greater the cutting force required. Correspondingly, the power of the cutting part and the whole machine needs to be increased. The performance requirements of the shearer are higher, and the mechanical manufacturing cost and process requirements should also be corresponding At the same time, the larger the diameter of the cutting drum, the worse the adaptability of the shearer to the change of coal seam thickness. [0003] In order to make the cutting part adapt to the change of coal seam thickness and ensure flexible mining...

AI Technical Summary

Problems solved by technology

However, the problem of forming "triangular coal" has not been effectively solved. After "triangular coal" is formed, manual or other auxiliary equipment is required to clean it up. The working efficiency of the shearer is reduced, and additional costs will be added.

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