关键词: 结构设计, 材料性能, 液压系统, 进口采煤机, 国产采煤机

Abstract: For the purpose of comparative study and development prospection of domestic electrical haulage shearers, this paper comparatively analyses key technical parameters and the structural layout of the whole machine, the structure and connection modes of main parts (such as ranging arms, electric haulage units and wheel boxes), the overload mechanical protection ways, the hydraulic system, the materials of key parts and vulnerable parts and the corresponding comprehensive mechanical properties among MG series shearers made in China, 7LS series shearers of JOY from the United States and SL series shearers of EKF from Germany. All analysis indexes show that domestic MG series shearers are almost comparable with the corresponding imported shearers from the core technical parameters, the structural arrangement and material performance, etc. In some aspects, the design concepts and structure of domestic MG series shearers are better than imported shearers, which is also one of the rapid development achievements of the coal mining machinery in recent 30+ years. But there is still a big gap between MG series shearers and some imported shearers as far as reliability and stability are concerned. And in terms of reliability and stability, 7LS series shearers of JOY and SL series shearers of EKF are still far ahead of many domestic MG series shearers. This is also the problem that must be solved in the future development of automation and intelligence mining for domestic MG series shearers.