摘要
本文以2006年度国家科技部科研院所专项资金项目“ZDY6000S履带自行式水平深孔瓦斯抽放钻机”为依托,总结了目前煤矿坑道用全液压动力头式钻机主要液压回路的型式和特点,指出钻机液压系统设计方法上还停留在只对系统进行稳态分析、对系统的动态控制过程关注不够的问题。论文研究了坑道钻探施工的负载特点,分析了钻机液压系统回转回路和给进回路的工作特性,设计了具有回转回路负载敏感变量和给进回路远控恒压变量的ZDY6000L型全液压坑道钻机液压系统,从坑道钻探施工负载特点出发,利用AMESim软件对典型全液压钻机的回转和给进液压回路进行了较系统的动态过程仿真分析,得出了该钻机阀控节流调速回路、泵控负载敏感调速回路、阀控给进调压回路、泵控恒压变量给进回路的动态特性曲线。论文对仿真结果进行了分析,验证了基于泵控负载敏感技术和泵控恒压变量技术的钻机液压系统设计的合理性,对典型复杂工况条件下,ZDY6000L型钻机液压系统与负载变化的适应性进行了仿真,结果表明负载敏感回路对泵压和马达进口压力波动改善效果显著。论文最后通过实验室测试验证了回转负载敏感回路的调速特性和性能特性,通过现场试验验证了钻机液压系统的工作稳定性。
通过本论文的研究工作,探索了应用动态设计方法进行钻机液压系统设计的新思路,对于改善目前全液压钻机的液压系统技术状况、促进煤矿用全液压钻机的更新换代均具有实际意义。
This paper is based on the project of ZDY6000S callipallar self- moving drilling rig for gas drainage by horizontal deep hole, which is specially supported by the fund offered by the Ministry of Science and Technology of China for scientific research institutions. The main hydraulic circuit type and characteristics of all hydraulic head type tunnel rigs are summarized, the problem with steady state analysis without enough dynamic control process on hydraulic system design method was raised. The load characteristic of tunnel drilling was studied, the working factors of rotation circuit and feed circuit were analyzed, the hydraulic system of ZDY6000L all hydraulic tunnel rigs was designed, with load sensing in rotation circuit and remote control with constant pressure variable in feed circuit. Starting from the load characteristics in tunnel construction, AMESim software was used to do simulation analysis on rotation circuit and feed circuit for the typical all hydraulic drilling rigs, dynamic curves for circuits were gained, such as valve control throttling speed regulating circuit, pump control load sensing speed regulating circuit, valve control feed pressure regulating circuit and pump control constant variable feed circuit. The simulation results was analyzed, the rationality of drilling rig hydraulic system based on pump control load sensing technology and pump control constant pressure variable technology were validated. As for typical and complex condition, adaptability simulation for load change was made on ZDY6000L drilling rig hydraulic system, load sensing circuit having good effect for pump pressure and motor inlet pressure fluctuation were indicated in results. The speed regulation and rotation performance characteristics for load sensing circuit were validated in lab test, working reliability of drilling rigs hydraulic system was also validated in field test.
The research work in this paper explored a new way for drilling rig hydraulic system design using dynamic design method, which had actual significance for hydraulic system improvement and development of drilling rigs.
引文
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