掘进机截割部混合动力传动系统设计与分析

为提高掘进机在深部煤岩工况下自适应性和掘进能力，分析了现有纵轴式悬臂掘进机在掘进时的工作特点以及截割部存在的问题，提出基于行驶系液压动力与原截割电机转矩耦合的截割部混合动力传动方案。对新截割传动系统进行合理的参数匹配并建立相关部件的力学模型，探索了不同工况下混合动力传动系统的工作模式。对新型掘进机的自适应性以及突变工况下系统缓冲特性进行了模拟分析，结果表明：新型混合动力截割系统能够有效适应负载变化，主截割电机可维持在恒功率高效率点附近工作；液压系统的柔性对突变工况下的冲击载荷有明显的缓冲作用。分析结果对新型采掘装备设计提供参考。

Design and research on hybrid transmission system of roadheader cutting unit

In order to improve the adaptability and cutting power of roadheader,the cutting characteristics of current longitudinal roadheader and the problems of cutting unit were analyzed.A new hybrid power-train system of the roadheader cutting unit was put forward based on the torque coupling between hydraulic power from walking unit and cutting motor.After matching the parameters of the new cutting unit,the dynamic models of related components were established and the work modes on different conditions were analyzed.The adaptability and buffer characteristic of the new roadheader under shock were simulated using software.It demonstrated that the new transmission system adapted the variable load efficiently and the cutting motor worked around constant power points.Benefited by the hydraulic system,there was a distinct buffer effect under variable working condition.The results can provide a referential foundation for the new design of mining equipment.