While the full hydraulic rotary drill drilling, torque limitation of the drill pipe plays an important role in the safety of the whole machine. Through the analysis of load characteristics of the drill pipe and the theoretical research of the rotary system, two kinds of rotary pressure limiting valve groups whose key components are relief valve and cartridge valve respectively were designed in order to limit the pressure of slewing hydraulic system. AMESim was used to simulate and analyze the valve groups, the rotary simulation curve was gained and whether the downstream pressure of the valves affects its opening pressure was made clear. Mathematical model of the logical cartridge valve was established and its dynamic and static characteristics were analyzed. The rotary pressure limiting system was analyzed by simulation and test. The output torque curve of the drill rotary hydraulic motor was gained. Correctness of the simulation analysis is verified by experiment results which show the feasibility of the rotary valve group. The theoretical basis and practical experience are provided for the design and development of the hydraulic system of domestic rotary drill.
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王智勇,赵静一,张志壮,齐九龙,唱荣蕾.全液压牙轮钻机回转系统限压阀组的设计与分析[J].机床与液压,2016,44(11):119-124. . Design and Analysis of the Limiting Valve Group of Rotary Pressure for Full Hydraulic Rotary Drill[J]. Machine Tool & Hydraulics,2016,44(11):119-124