Research on Dynamic Characteristics of Drilling Rig Rotary System with Load Speed Regulation under Different Strata
Due to the uncertainty and randomness of the rock distribution in the drilling formation,the dynamic characteristics of the rotary hydraulic system of the drilling rig are complex and variable.Simultaneously,if the rotary speed of the drilling tools can't be regulated automatically according to the ground conditions,it will lead to some phenomena in the drilling tools such as "sticking" and"skewing".Taking the rotary hydraulic system of drilling rig as the research object,the strata distribution of subsurface resources was in-vestigated.The torque and the speed were calculated under different strata.The electromechanical-hydraulic co-simulation model of the rotary system of the drilling rig was constructed based on AMESim and Simulink.Finally,the dynamic characteristics of the rotary system during rock-breaking operations in four types of substrata were investigated.Meanwhile,the effectiveness of drilling rig rotary system in controlling the rotational speed of drilling tools was studied.The results show that,the pressure of the rotary system of the drilling rig can rise from the initial 0 to the working pressure 2.1 MPa within 0.01 s.Additionally,the rotary system has good anti-interference capability and stability during a sudden increase in load torque.And the method of controlling the rotary speed of drilling rig by utilizing the pres-sure difference between the inlet and outlet of the motor has a hysteresis of 0.5 s and an error value of no more than 5%.Moreover,this control method possesses a faster response time and higher control accuracy.
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维普
