采煤机机电液短程截割传动系统设计与性能分析

截割部是滚筒采煤机最重要的组成部分，也是最易产生失效的部分。可靠性低和适应性差的问题是现有滚筒采煤机截割部存在的主要问题，针对这些问题设计了一种机电液短程截割传动系统及其自适应控制策略。为了验证该方案的有效性和可行性，建立了泵控马达系统、蓄能器和滚筒负载的数学模型，基于AMESim和Matlab/Simulink联合仿真平台，建立了MG300型电牵引采煤机整机模型，并进行了各典型工况下的性能分析，结果表明搭载机电液短程截割传动系统的采煤机在各种煤层下均能实现滚筒转速的良好调节且效率维持在70%以上，能保证截割电机或牵引电机的恒功率运行，能实现缓冲减振，并且在部件失效时能实现系统降功率运行从而避免停工损失。因此，仿真结果表明所设计截割传动系统具有良好的自适应能力和可靠性，为采煤机截割传动系统的设计与优化提供了理论依据，为进一步实现工程应用奠定了基础。

Design and performance analysis on mechanic-electronic-hydraulic short range cutting transmission system of shearer

The cutting unit is the most important component of a shearer,but it is also the part that produces failure easily.The problems of low reliability and poor adaptability are the main problem of the existing roller shearer’s cutting part.To solve these problems,a new kind of mechanic-electronic-hydraulic short range cutting transmission system and its adaptive control strategy were developed.In order to verify the validity and feasibility of the proposed scheme,the mathematical models of the pump control motor system,accumulator and roller load was established.The whole machine simulation model of MG300 shearer was established based on AMESim and Matlab/Simulink.Performance analysis in some typical operating conditions was carried out.The results show that the shearer equipped with the designed transmission system can regulate roller speed well and keep the transmission efficiency above 70% in different coal seams.Also,it can ensure the constant power operation of cutting motor or traction motor,process the buffering and damping function and realize power down operation when some component fails so as to avoid the losses of work stoppage.Consequently,the simulation results show that the designed cutting transmission system has good adaptability and reliability,which provides a theoretical basis for the design and optimization of the shearer cutting transmission system and lays a foundation for the further industrial application.