Mechanismhydraulic cosimulation and experiment on hydraulic slewing system of the rotary drilling rig
                                                                         XIAO Hua1, ZHU Jianxin2
(1.Guangdong Midea Intelligent Robot Co., Ltd., Foshan 528311, China;2.The State Key Laboratory of High Performance Complicated Manufacturing, Central South University, Changsha 430012, China)

Abstract: Aiming at the problems of excessive fluctuation and excessive starting brake pressure of system in large rotary drilling rigs, a certain rotary drilling rig was used as the research object. A virtual prototype simulation model of large rotary drilling rig was established in the ADAMS, and a simulation model of large rotary drilling rig hydraulic slewing system was built in the AMEsim. By analyzing the characteristics of two software data exchanged, a mechanicalhydraulic cosimulation model of large rotary drilling rig was built, and the correctness of the simulation model was verified by prototype test. The results indicate that the rotary buffer valve can reduce the inlet pressure fluctuation of the rotary system, eliminate the fluctuation of keeping down pressure, reduce excessive brake pressure, and the conclusions have engineering application value.

Key words: rotary drilling rig; hydraulic slewing system; slewing dynamic performance; swing buffer valve