Abstract
Since the output torque of the rotary reducer of the ZYL‐15000D‐kilometer directional drill is proportional to the gear train transmission ratio, the output torque is large enough when the input speed and output speed meet the design goal. This paper selects the method of reducing the transmission ratio to optimize the size parameters of the reducer. MATLAB genetic algorithm is used in the optimization design, and the minimum volume of the rotary part reducer is taken as the objective of optimization design, while the design variables and constraints are determined. The optimal value of design variables was obtained through optimization, and the parameter values of each gear were determined accordingly. Through analysis, the total volume of the optimized gear reducer was reduced by 49.6%. Then, the 3D model of the optimized gear was created, and the analysis of the transient dynamics of the optimized gear was carried out with ANSYS Workbench software. According to the analysis results, the optimized gear met the strength requirements and provided a reference for the subsequent optimization design of other types of gear reducers.
Highlights
Horizontal directional drilling is a trenchless construction method, which is usually completed by directional drilling RIGS, steering bits, and steering instruments [1]. e steps of the directional drill include drilling along the design path, reaming with a reamer, and pulling back of the product or casing [2, 3].Directional drilling technology is used in pipeline laying and geological exploration but more importantly in coal mine gas drainage and discharge operations
Creo was used to model the optimized gear to obtain the 3D model of the gear. en, the 3D gear model was imported into ANSYS Workbench to perform transient dynamics analysis on the gear to verify the reliability of the optimized model [13,14,15]
Genetic algorithm (GA) is an algorithm that simulates the evolution of organisms by computer based on the genetic characteristics of organisms; the general steps of genetic algorithm are as follows: first replace the feasible solution with chromosomes, and these produced chromosomes are called feasible solution set. en, the chromosome is put into “nature” according to the law of biological evolution in nature, excellent individuals are selected for crossover and mutation, and new chromosome individuals are produced
Summary
Horizontal directional drilling is a trenchless construction method, which is usually completed by directional drilling RIGS, steering bits, and steering instruments [1]. e steps of the directional drill include drilling along the design path, reaming with a reamer, and pulling back of the product or casing [2, 3]. Directional drilling technology is used in pipeline laying and geological exploration but more importantly in coal mine gas drainage and discharge operations. It is the key technology of coal mine gas control and can ensure efficient extraction and safe production of coal, so it has been listed as a key development direction in the national coal industry “ e irteenth Five-Year” development plan [2, 4,5,6,7]. E horizontal directional drilling machine is a piece of special equipment for underground gas extraction. It is a directional drilling technology with a screw motor with a bent joint. Creo was used to model the optimized gear to obtain the 3D model of the gear. en, the 3D gear model was imported into ANSYS Workbench to perform transient dynamics analysis on the gear to verify the reliability of the optimized model [13,14,15]
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