Dynamic Analysis And Control Methods Study On Hydraulic System Of All Hydraulic Head Type Drilling Rigs

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.