基于差动行星齿轮调速原理，设计了一种截割转速可调的采煤机液压混合动力截割传动系统． 根据系统组成，建立了关键元件的数学模型及控制方法． 以AMESim 软件
为平台，分析了液压马达和滚筒的动态特性以及液压混合动力系统的缓冲性能． 结果表明: 所设计的液压混合动力截割传动系统能够调节采煤机的截割转速，在复杂煤层下比传统恒速截割采煤机具有更好的截割性能; 液压马达及滚筒响应速度快且能够准确跟踪目标转速，液压系统可以缓和突变负载产生的冲击．

On the basis of the speed regulation principle of differential epicyclic gears,a hydraulic hybrid cutting transmission system for the drum shearer with speed regulation is designed.Then,according to the system composition,the mathematical models of key parts and their speed control methods are constructed respectively.Finally,the dynamic characteristics of hydraulic motor and drum and the cushion property of the designed system are analyzed by using AMESim.The results show that ( 1) the designed system can regulate the speed of drum shearers,which makes the new machine achieve better cutting performance in complex working conditions in comparison with the traditional drum shearer of constant speed; ( 2) the hydraulic motor and drum have high response speed and can accurately track the goal speed; and ( 3) the designed system can cushion the shock caused by mutation loads.