A Method for Optimizing the Parameters of Auger Drill Pipe

Abstract

The invention discloses an L800*76 efficient transmission spiral drill rod and a parameter optimizing method. On the basis of a single-particle motion algorithm, the stress situation of a loose and soft coal seam in the spiral drill rod advancing process is analyzed, and accordingly a factor of rotation speed of the spiral drill rod is derived; further, a structural parameter influencing the conveying rate is obtained through computation and analysis on the coal particle quality conveying rate of the spiral drill rod during vertical drilling, and an optimum structural parameter of the spiral drill rod is obtained. The influence of secondary coal particle breakage on the parameterized computation is avoided through the single-particle motion analysis of the coal seam in the conveying process, an optimum drill rod parameter method is obtained, the filling rate, a drill rod blade helix angle and the mandrel diameter of the L800*76 spiral drill rod are design variables, meanwhile the influence of float coal quantity and lump coal rate on the coal seam density and friction factors is considered, a corresponding parameterized model is established, accordingly the coal conveying rate is improved, and the structural parameter of the spiral drill rod meets the working requirement.

Description

technical field [0001] The invention relates to a method for optimizing parameters of an auger drill rod, which belongs to the technical field of mechanical drill equipment. Background technique [0002] With the in-depth development of coal seam resources in my country, the mining of protruding soft coal seams is also gradually expanding, and the design of the auger drill pipe is of great significance to solve the mining of soft coal seams in my country and improve the mining rate of coal seams. It is the main link of power transmission, and plays the role of conveying the coal powder cut by the drill bit. Due to the mutual extrusion between the blade and the coal powder of the drill pipe during the coal particle transportation process, it causes secondary crushing, which makes the coal particle The overall force becomes very complicated, which adds difficulty to the parametric design of the auger drill pipe. Contents of the invention [0003] The purpose of the present in...

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Problems solved by technology

[0002] With the in-depth development of coal seam resources in my country, the mining of protruding soft coal seams is also gradually expanding, and the design of the auger drill pipe is of great significance to solve the mining of soft coal seams in my country and improve the mining rate of coal seams. It is the main link of power transmission, and plays the role of transporting the coal powder cut by the drill bit. Due to the mutual extrusion between the blade and the coal powder of the drill pipe during the coal particle transportation process, it causes secondary crushing, which makes the coal particle The overall force becomes very complicated, which adds difficulty to the parametric design of the auger drill pipe

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