国内外电牵引采煤机对比研究及展望

Comparative study and prospect of domestic electrical haulage shearers

为研究国产电牵引采煤机及展望其发展,分别从整机核心技术参数、关键零部件及易损件材料和综合机械性能、整机结构布置和大部件结构及连接方式(如摇臂、牵引行走部和行走箱)、机械过载保护、液压系统等几个方面对国产MG系列采煤机和美国JOY公司7LS系列采煤机、德国EKF公司SL系列采煤机做了详细的对比分析研究。各项分析指标显示,国产MG系列采煤机无论整机核心技术参数,还是结构布置及材料性能等方面已几乎可以和进口采煤机相媲美,甚至有些方面国产MG系列采煤机的设计理念及结构优于进口采煤机,这是我国煤矿机械近30多年高速发展的成果。但采煤机仍然是综采设备中与国外进口设备相差最大的设备,特别是可靠性和稳定性方面,美国JOY公司7LS系列和德国EKF公司SL系列采煤机依然领先于国产MG系列采煤机不少。这是以后国产采煤机发展自动化及智能化必须解决的问题。

In order to study and prospect the domestic electrical haulage shearers,we compared the 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 more than 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 automatic and intelligent mining for domestic MG series shearers.