瞬态过程中采煤机机电传动系统动态特性分析

易园园,秦大同,刘长钊,贾涵杰

振动与冲击 ›› 2018, Vol. 37 ›› Issue (1) : 142-149.

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (1) : 142-149.
论文

瞬态过程中采煤机机电传动系统动态特性分析

  • 易园园,秦大同,刘长钊,贾涵杰
作者信息 +

Dynamic behaviors of the electromechanical transmission system of a coal shearer in transient regimes

  • YI Yuan-yuan,QIN Da-tong,LIU Chang-zhao,JIA Han-jie
Author information +
文章历史 +

摘要

为研究采煤机传动系统在复杂工况下的动态性能,采用MATLAB /Simulink搭建了采煤机截割-牵引耦合系统机电动力学模型,模型中考虑了驱动电机电磁特性、煤层截割阻抗变化、传动系统扭振、时变啮合刚度和齿侧间隙等因素。仿真并分析了系统在启动、滚筒负载突变和截割电机堵转等瞬态过程中的机电动态响应特性,并进行了试验验证。结果表明:在截割电机启动和堵转过程中,电机和传动系统之间发生强烈的耦合作用,导致传动系统出现脱啮、反冲等非线性冲击现象,使系统振动加剧;在设计采煤机传动系统时,截割部应比牵引部取更大的使用系数,高速级应比低速级取更大的安全系数。

Abstract

To investigate the dynamic behavior of the transmission system of a coal shearer under different working conditions, a cutting-haulage coupled model was established by using MATLAB/Simulink, in which the electromagnetic characteristics of the driving motors, variation of the cutting resistance of the coal seam, torsional vibration of the transmission system, time-varying meshing stiffness and tooth backlash were considered. Then, the electromechanical dynamic behaviors of the system were simulated in the regimes of run-up, drum load sudden-change and locked-rotor. Finally, a coal-cutting experiment was conducted on a realistic shearer to verify the simulation results. The results show that in the regimes of run-up and locked-rotor, strong interactions occur between the motor and the transmission system, which causes nonlinear impact phenomena including the gear contact lose and clonk. In the design of the transmission system of a coal shearer, a higher application factor should be adopted for the cutting unit than the haulage unit and a higher safety factor should be adopted for the high-speed stage gears than the low-speed stage gears.
 

关键词

采煤机 / 瞬态过程 / 机电传动系统 / 动态特性

Key words

coal shearer / transient regime / electromechanical transmission system / dynamic behavior

引用本文

导出引用
易园园,秦大同,刘长钊,贾涵杰. 瞬态过程中采煤机机电传动系统动态特性分析[J]. 振动与冲击, 2018, 37(1): 142-149
YI Yuan-yuan,QIN Da-tong,LIU Chang-zhao,JIA Han-jie. Dynamic behaviors of the electromechanical transmission system of a coal shearer in transient regimes[J]. Journal of Vibration and Shock, 2018, 37(1): 142-149

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