Design And Analysis Of Potential Energy Recovery Hydraulic Pumping Unit

Oil is an important raw material in modern production and life.From energy power of various mechanical equipment to cosmetics in daily life,oil is indispensable.As the core equipment in the contemporary oil production process,the pumping unit needs to consume a lot of energy in the process of oil extraction,which has the problems of large energy loss and low utilization rate.In this paper,a kind of energy-saving and efficient hydraulic pumping unit is studied.The accumulator is used to recover the gravity potential energy released during the falling process of the sucker rod,and it is used in the rising stage of the sucker rod to save the main pump power.First of all,this paper summarizes the current situation of the development of the hydraulic pumping unit at home and abroad,and expounds the development trend of the hydraulic pumping unit in the future.Then,according to the performance parameters of the motor-driven pumping unit,the parameters of the hydraulic pumping unit in this study are determined.Then,according to the selected parameters,the mechanical structure and hydraulic system of the hydraulic pumping unit are designed and analyzed.The mechanical structure design and analysis of the hydraulic pumping unit includes the determination of the mechanical structure,the selection of parts,the drawing of three-dimensional model and the finite element analysis of the model by ANSYS.The finite element analysis of the mechanical structure includes the static analysis,modal analysis and topology optimization of the frame and the pumping unit.Through the static analysis,the deformation,stress and strain of the mechanical structure are obtained,and according to the results,the mechanical structure has certain safety and stability,and there is no obvious waste of material.The design and analysis of the hydraulic system includes the determination of the hydraulic system,the selection of the hydraulic components,the simulation of the hydraulic system built by AMESim and the optimization of the hydraulic system by adding the control module.The simulation of the hydraulic system is to divide the whole system into several parts for simulation,and then integrate and analyze the whole hydraulic system,adding the valve control system to control the rising speed of the sucker rod,and by adding PID module and fuzzy PID control module to optimize the system,to achieve a better control effect..Accumulator is the main energy-saving component of the energy-saving hydraulic pumping unit designed in this paper.Through the analysis of different parameters of accumulator,the parameters of better accumulator recovery capacity are obtained.The energy recovery rate and energy saving rate of the whole system are calculated through the calculation of accumulator recovery energy.Then compared with the reference motor-driven pumping unit,the energy saving rate of this pumping unit compared with the motor-driven pumping unit is obtained.Valve control system is the core of this control system,through the experiment to verify the response speed of valve control system in different control modules,compared with the simulation results,get the consistency between the experimental results and the simulation results,so as to verify the optimization effect of fuzzy PID on valve control system.