Research Of Rotary System Accuracy And Power Consumption Of Rotary Drilling Rig

Rotary Drilling Rig is a Large construction machinery used to complete theconstruction of a pore-forming operations, because of its flexible, efficient, full-featuredand other advantages, it has been widely used in a variety of pile foundation construction,continuous wall, foundation reinforcement, etc. Rotary drilling rig is made up of the bus(host) part and the chassis (walking) component, turn the bus (host) part is a constructionprocess which is the most fundamental and construction frequent action, its positioningaccuracy is directly related to the quality and overall efficiency of drilling, Rotary actionincluding start, turn and brake, because of the rotary inertia of platform is large andfrequent changes, the control of its accuracy and energy loss is more difficult, sopositioning precision and optimize of energy consumption of rotaryhas great significanceto improve vehicle efficiency and reduce construction costs.Based on the analyze of the characteristics of the rotary drilling rig rotary system,Combined with the design ideas of the existing mature rotary drilling rig rotary system,completed the design of rotary hydraulic system and electrical system. Among them, useof load sensing control technology, to achieve the output power of the hydraulic system,With real-time load changes while always maintaining power matching, through the useof braking energy accumulator rotation braking for recycling, plays a significant role toreducing energy consumption of the system. By composite use of electro-hydraulicproportional control technology, load sensing technology and brake energy recoverytechnology, improve positioning accuracy of Swing control system. Using power bondgraph method to establish mathematical models of rotating system, Preparation theequation of state of each node, do simulation analysis of the use of MATLAB,comparison to the effect of the accumulator and the parameters of the system, thesimulation results show, Reasonable regulating structure parameters of the hydraulicsystem and electronic control system parameters can significantly improve the controlprecision of the system, using accumulator played a significant role in control of systemEnergy, verify the feasibility of the system. Do Rotary experiment of Rotary Drilling Rig, experimental results show that the designed system meets the requirements of the actualwork, reach the purpose of improving the positioning accuracy and reduce energyconsumption.