采煤机截割部机电传动系统动力学特性分析

doi:10.3901/JME.2016.07.014

摘要/Abstract

摘要： 针对采煤机截割机电传动系统动载荷大易于损坏的特点,提出一个行星齿轮变速过程扭转动力学模型,建立包含电动机、齿轮传动系统和滚筒的采煤机截割机电传动系统动力学模型,并对冲击载荷下采煤机截割机电传动系统的动力学特性进行仿真,研究电动机-齿轮传动系统的连接刚度和阻尼以及齿轮啮合刚度对采煤机截割机电传动系统动力学特性的影响,最后提出了减小采煤机截割部机电传动系统的动态啮合力冲击的方法,以减少采煤机截割传动系统的破坏。啮合冲击力可以分成两类：时变啮合刚度引起的啮合冲击力和冲击负载引起的啮合冲击力。可以通过减少啮合刚度的变化(比如采用人字齿轮)来降低时变啮合刚度引起的动态啮合力冲击;选取合适的电动机-齿轮传动系统连接阻尼和较小的电动机-齿轮传动系统连接刚度来减小冲击负载引起的动态啮合力冲击。

关键词: 变速过程, 采煤机截割部, 动力学特性, 机电传动系统

Abstract: A torsional dynamic model of variable speed process for planetary gears is proposed. A dynamic model for the cutting electromechanical transmission system in long-wall shearers is proposed which including the electric motor, gear transmission system, and shearer drum. It is investigated how the dynamic characteristics of the cutting electromechanical transmission system are affected by the stiffness and damping of the connection between the electric motor and the gear transmission system as well as the meshing stiffness. The methods are proposed to reduce the meshing shock force. The meshing shock force can be grouped into two categories the meshing shock force cause by the time-varying meshing stiffness and the meshing shock force cause by the shock load. The meshing shock force cause by the time-varying meshing stiffness can be reduced by decrease the fluctuation of the meshing stiffness, for example, herringbone gears. The meshing shock force caused by the shock load can be reduced by choosing optimal damping and smaller stiffness of the connection between the electric motor and gear transmission.

Key words: cutting part of the long-wall shearer, dynamic characteristics, electromechanical transmission system, variable speed process

中图分类号:

TH117

刘长钊, 秦大同, 廖映华. 采煤机截割部机电传动系统动力学特性分析[J]. 机械工程学报, 2016, 52(7): 14-22.

LIU Changzhao, QIN Datong, LIAO Yinghua. Dynamic Analysis for the Cutting Electromechanical Transmission System in the Long-wall Shearer[J]. Journal of Mechanical Engineering, 2016, 52(7): 14-22.

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