采煤机变频调速系统研究与关键零件可靠性分析

发布时间：2018-04-09 01:20

本文选题：采煤机　切入点：直接转矩控制　出处：《辽宁工程技术大学》2015年硕士论文

【摘要】：采煤机是综采工作面的重要设备之一,其工作环境恶劣,载荷复杂。牵引部是采煤机的主要部件和易损坏部件,其可靠性决定着采煤机的性能和使用效果。近些年,电牵引采煤机已成为世界各国研究的主要方向,为了提高煤矿的开采效率,采煤机的牵引速度和牵引力在不断增加,随之,对采煤机的主要部件的强度和寿命的要求也在不断增加,因此对其牵引部调速系统有了更高的要求。为了使采煤机牵引系统既满足采煤效率的要求,又能保证其关键零部件的可靠性,首先研究电牵引采煤机牵引调速系统的动态特性,引入直接转矩控制的变频调速原理,结合采煤机调速系统的特点,利用MATLAB构建了直接转矩控制调速系统的仿真模型,从而验证该牵引调速系统的可行性。在不同工况下,不同的牵引速度和牵引力也会影响整个采煤机中各零件的受力情况,对其关键零件的可靠性造成巨大影响。行走轮是采煤机的重要零件之一,因此本文对采煤机行走轮的可靠性进行了分析,首先在PRO/E环境下建立采煤机完整的三维几何模型,然后使用ADAMS对其进行运动学仿真,之后通过LS-DYNA对行走轮进行显示动力学仿真分析,最后运用ANSYS疲劳模块对其进行疲劳寿命分析,验证了该采煤机行走轮的可靠性。论文的研究方法对电牵引采煤机的设计与研究有重要的借鉴意义。
[Abstract]:Shearer is one of the most important equipment in the fully mechanized working face, the working environment is bad, the load is complex. Traction is the main component of the shearer and easily damaged parts, its reliability determines the performance of shearer and its effect. In recent years, electric traction shearer has become the main direction of research in the world, in order to improve the coal mining the efficiency of the shearer traction speed and increasing, then, strength and life of the main components of the shearer's requirements are constantly increasing, so the speed control system of the traction department have higher requirements. In order to make the shearer coal mining system can not only meet the requirements of efficiency, and can guarantee the the reliability of the key parts of the dynamic characteristics, firstly the electric traction speed control system of shearer, introduced the principle of frequency conversion of direct torque control, speed control system combined with the characteristics of the coal mining machine, using MATLAB To build a simulation model of direct torque control system, in order to verify the feasibility of the traction drive system. Under different conditions, the stress condition of different traction speed and will affect the whole parts of shearer, seriously affects the reliability of its key parts. The walking wheel is one of the important parts of coal mining the machine, so this paper on the reliability of shearer wheel are analyzed firstly, establish the 3D geometric model of the shearer integrated in the PRO/E environment, and then use ADAMS to carry on the kinematics simulation of the walking wheel, after the display dynamic simulation by LS-DYNA, using the ANSYS module of the fatigue life of fatigue analysis, verification the reliability of the shearer wheel. The research method is of great significance for design and research of electric traction shearer.

【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD632.1

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