Underground maintenance-free walking mechanism for thin seam coal winning machine and wellhead maintenance method thereof

Abstract

The invention discloses an underground maintenance-free walking mechanism for a thin seam coal winning machine and a wellhead maintenance method thereof. The walking mechanism comprises a shell body,a big end plate, a guiding sliding shoe, a spline shaft and a rack rail wheel. The method includes the steps that firstly, data collecting is carried out; secondly, whether the coal mining amount of the coal winning machine reaches the rated coal passing amount of the coal winning machine or whether the service time of the walking mechanism reaches the service time threshold of the walking mechanism are determined; thirdly, a standby walking mechanism is transported downward; fourthly, the whole walking mechanism is demolished and transported upward; fifthly, old elements in the walking mechanism are demolished; sixthly, precision measurement and error repair of an installing hole which is formed in a bearing base on the shell body are carried out; seventhly, precision measurement and error repair of an installing hole which is formed in a bearing on the big end plate are carried out; eighthly, the abrasion loss of a guiding face of the guiding sliding shoe is measured and repaired; and ninthly, the walking mechanism is assembled. According to the underground maintenance-free walking mechanism for the thin seam coal winning machine and the wellhead maintenance method thereof, the abrasion of the shell body and the spline shaft in the using process is reduced, the maintenance time is effectively saved, and the underground maintenance is furthest reduced before the underground maintenance-free state is achieved.

Description

technical field [0001] The invention belongs to the technical field of coal shearers, and in particular relates to an underground maintenance-free traveling mechanism of a thin coal seam coal shearer and an above-ground maintenance method thereof. Background technique [0002] With the comprehensive mechanization of coal mine production in my country and the acceleration of the construction of high-yield and high-efficiency mines, the design of highly reliable and easy-to-maintain shearers has become the key technology in the research of the shearer manufacturing industry in recent years. As the legs of the shearer, the traveling mechanism is an important part of the shearer. Among them, the wearing parts account for a large proportion, and the underground maintenance takes a long time and is labor-intensive. Especially in the thin coal seam working face, it is difficult to carry out underground maintenance work due to the small space. , which seriously restricts the improve...

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Problems solved by technology

[0004] 1. The bearings of the traveling wheels are directly installed on the shell, so it is difficult to disassemble and assemble underground, and when the bearing mounting hole on the shell is deformed, it needs to be repaired or even the whole shell needs to be replaced;

[0005] 2. The bearing needs to be injected with lubricating grease regularly, but the underground space is small, the operation is inconvenient, and the oil passage is easy to be blocked;

[0006] 3. The rack wheel and the spline shaft are only connected by splines. The radial positioning accuracy of the spline to the rack wheel is low, and the spline is susceptible to radial impact during use, which affects the service life of the spline

[0007] At the same time, at present, the maintenance of the running mechanism of the coal mining machine generally adopts timely replacement of damaged parts in the traveling mechanism of the coal mining machine from time to time underground. Due to the difficulty of underground maintenance, the labor intensity of the miners is relatively high, and safety accidents are prone to occur. ACCIDENT

In addition, the design life of key components does not match the service life of the overall traveling mechanism, and the maintenance standards are inconsistent. In terms of design and maintenance methods, only focus on improving the strength of a single piece, and lack of consideration for overall reliability, resulting in constant small and medium failures in underground use and frequent maintenance

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