Optimization Design And Performance Simulation Of New Mechanical Commutation Non Beam Pumping Unit

China is facing the outstanding problems of energy shortage and the lack of effective development of a large number of oil resources.Because of the restriction of the technical level,the average recovery rate is less than 35 %,especially the performance of the pumping unit which occupies most of the mechanical oil production equipment directly influences the oil recovery.Increasing stroke and reducing stroke are effective means to improve the performance of pumping unit.therefore,it is of positive significance to develop a long stroke and low impact pumping unit to reduce oil production oil production equipment directly influences the oil recovery.Increasing stroke and reducing stroke are effective means to improve the performance of pumping unit.therefore,it is of positive significance to develop a long stroke and low impact pumping unit to reduce oil production oil production equipment directly influences the oil recovery.Increasing stroke and reducing stroke are effective means to improve the performance of pumping unit.therefore,it is of positive significance to develop a long stroke and low impact pumping unit to reduce oil production cost and improve comprehensive economic benefits.Through the analysis,the traditional beam pumping unit can not meet the needs of the current oil field.in view of the shortage of the existing there is no pumping unit,combining with the needs cost and improve comprehensive economic benefits.Through the analysis,the traditional beam pumping unit can not meet the needs of the current oil field.in view of the shortage of the existing there is no pumping unit,combining with the needs cost and improve comprehensive economic benefits.Through the analysis,the traditional beam pumping unit can not meet the needs of the current oil field.in view of the shortage of the existing there is no pumping unit,combining with the needs.The new type of pumping unit adopts pure mechanical commutation,and applies the planetary gear train consisting of crankshaft,connecting rod,sector gear,rocker,cylindrical gear and so on.The crankshaft is connected to the connecting rod,the connecting rod is fixedly connected with the sector gear,the The new type of pumping unit adopts pure mechanical commutation,and applies the planetary gear train consisting of crankshaft,connecting rod,sector gear,rocker,cylindrical gear and so on.The crankshaft is connected to the connecting rod,the connecting rod is fixedly connected with the sector gear,the floor area.Aiming at the new type of pumping unit,this paper establishes the movement law(displacement,velocity,acceleration),longitudinal vibration of sucker rod,crankshaft torque,motor output and input power simulation model,which provides the theoretical foundation for the dynamic parameter simulation and mechanism optimization of the pumping unit.Using the theory of mechanical optimization design,considering the influence of various parameter factors on the working performance of the there is no pumping unit,taking the maximum torque factor of the hanging point as the objective function,the overall structure size of the pumping unit is optimized.Taking the minimum rms torque of crankshaft as the objective function,the parameters of the balance device are optimized.Through the finite element analysis and optimization design,the key parts of the design meet the strength and stability requirements.Using MATLAB to simulate the new pumping unit,and compared with the simulation curve of the conventional beam pumping unit under the same oil production condition.The simulation results show that the new pumping unit has the superior dynamic performance,the crankshaft torque fluctuation is small,the negative torque is basically eliminated,and the pumping unit is more stable in the normal swabbing process.