采煤机行走机构齿轨轮啮合特性分析研究

发布时间：2018-05-24 16:45

本文选题：齿轨轮 + 齿形对比　；参考：《西安科技大学》2017年硕士论文

【摘要】：采煤机行走机构齿轨轮与布置在刮板输送机槽帮上的销轨相啮合,实现采煤机沿工作面的移动与换向,是行走机构的重要执行元件。由于井下复杂的工况条件,导致齿轨轮行走过程因磨损、齿面塑变和轮齿折断等失效而必须停机更换,严重影响了采煤机的生产效率。本文针对这一突出问题,对齿轨轮与销轨的实际工况的啮合特性进行了分析;建立了 147mm节距两种不同齿形齿廓齿轨轮与销轨啮合的几何模型和有限元模型,通过仿真分析,得出不同齿形齿廓对齿轨轮寿命的影响结果。论文完成的主要工作如下:(1)分析研究了齿轨轮失效的形式和原因,得出导致齿轨轮失效的主要原因是齿轨轮与销轨的啮合存在变中心距和变节距的问题;(2)通过对齿轨轮与销轨过渡处9种实际工况的啮合分析,找出最易发生齿轨轮失效的极限工况;(3)建立了进口和国产两种齿形参数的齿轨轮与销轨啮合的几何模型和有限元模型,并对其极限工况、标准工况分别进行了仿真分析;(4)对比两种齿形参数齿轨轮仿真结果表明:进口齿轨轮较国产齿轨轮单齿啮合所受接触应力和弯曲应力小,啮合过程平稳、波动小,且啮合位置比较好;按进口齿形进行改进后的国产齿轨轮的试验结果表明,其耐磨性及抗断齿能力均有所增强。
[Abstract]:The gear rail wheel of the shearer's walking mechanism meshing with the pin rail arranged on the side of the scraper conveyer, which realizes the movement and direction change of the shearer along the working face, is an important executive element of the walking mechanism. Because of the complicated working conditions in the underground, it is necessary to stop and replace the gear rail wheel due to wear, tooth surface plastic deformation and gear tooth fracture, which seriously affects the production efficiency of the shearer. Aiming at this outstanding problem, the meshing characteristics of the gear rail wheel and the pin rail are analyzed in this paper, the geometric model and the finite element model of the engagement between the gear rail wheel and the pin rail with two different tooth profiles with 147mm pitch are established, and the simulation analysis is carried out. The effect of different tooth profile on the life of gear rail wheel is obtained. The main work accomplished in this paper is as follows: (1) the form and cause of gear wheel failure are analyzed and studied. It is concluded that the main reason for the failure of the gear rail wheel is that the meshing between the gear rail wheel and the pin rail exists the problem of variable center distance and variable pitch distance. Through the meshing analysis of 9 actual working conditions in the transition between the gear rail wheel and the pin rail, The geometric model and finite element model of the engagement between the gear rail wheel and the pin rail with imported and domestic tooth profile parameters are established, and the limit working conditions of the gear rail wheel are analyzed. The simulation results show that the contact stress and bending stress of the imported gear are smaller than that of the domestic gear, and the meshing process is stable and fluctuating. The experimental results show that the wear resistance and tooth breaking resistance of the domestic gear rail wheel improved according to the imported tooth profile are improved.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD421.6

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