滚筒采煤机调高系统动态特性的研究  

Research on Dynamic Characteristics of Height Adjustment System of Drum Shearer

作　　者：冀成 Ji Cheng(Tunlan Coal Mine,Xishan Coal and Electricity Group,Taiyuan 030200,China)

机构地区：[1]西山煤电集团公司屯兰矿,太原030200

出　　处：《煤矿机械》2020年第9期53-55,共3页Coal Mine Machinery

摘　　要：通过建立采煤机截割调高系统力学模型,并应用MATLAB对系统的动态特性进行了研究,分析了液压缸支撑刚度和阻尼对系统瞬态和稳态响应的影响。分析结果表明,液压缸支撑刚度一定的情况下,液压缸阻尼越大,系统振动响应过程中瞬态幅值就越小,且响应时间越短;在液压缸阻尼一定的情况下,液压缸支撑刚度越大,系统瞬态响应阶段的振动频率越大,系统稳态振动幅值越小,因此刚度的增大可以有效地减轻截割机构的衰减振动,减小系统稳态振幅,研究结果可为采煤机截割部振动的减小提供依据。The mechanical model of the height adjustment system for shearer cutting was established,and the dynamic characteristics of the system were studied by using MATLAB.The effects of the hydraulic cylinder support stiffness and damping on the transient and steady state response of the system were analyzed.The analysis results show that under the condition that the rigidity of the hydraulic cylinder is constant,the greater damping of the hydraulic cylinder,the smaller transient amplitude during the vibration response of the system,and the shorter response time.Under the condition that the damping of hydraulic cylinder is constant,the greater the stiffness,the greater vibration frequency in the transient response phase of the system,and the smaller steady-state vibration amplitude of the system.Therefore,increasing the stiffness can effectively reduce the damping vibration of the cutting mechanism and reduce the steady-state amplitude of the system.The research results can provide a basis for reducing the vibration of the shearer cutting part.

关 键 词：采煤机 调高系统 动态特性 建模仿真 

分 类 号：TD421.6[矿业工程—矿山机电]