Design And Research Of Mechanical Non-Switching Directional Pumping Unit System

The shortcomings of energy consumption,short stroke and low efficiency of the beam pump are relatively weak in the late stage of oil exploitation.Though the non-beam pump can adapt well to the needs of the middle and late stage of oil exploitation,the failure rate of the reversing device is higher.Common reversing devices are hydraulic reversing device,motor reversing device and mechanical reversing device.Among them,mechanical transition is easy to achieve in technically.Based on the new mechanical device without Switching,this paper puts forward to a mechanical non-switching directional pumping unit system.The equivalent dynamic model of the pumping unit is established,and it is researched and designed in consideration of the real motion law.Firstly,according to the actual working conditions of the pump,the design of the system program is completed.the motor and the steel wires is selected,the drive wheel,truss,suspension rope and other components is designed.Secondly,though studying the motion of the pumping unit,the characteristics of up stroke and down stroke of pumping unit are obtained.Besides,The suspension load is calculated by the diagram,and the mechanical characteristics of the low-speed large torque permanent magnetic synchronous motor are fitted.To study the real motion law of the pump system,an equivalent dynamic model is established by analyzing the system’s equivalent rotation inertia and equally effective moment.Then,an ADAMS multi-body dynamics model is established for motion simulation.In addition,the suspension displacement and speed of the pump are analyzed,and the stroke of the nuclear pump is checked.Through the introduction of ANSYS output flexible parts into ADAMS,a rigidly coupled dynamics model is established.The dynamic characteristics of the pump system are studied.The force curve of the slider and gear are drawn,and the strength analysis of gear shafts,guide rods and crankshafts is carried out in the end.Finally,with the help of fatigue analysis software Ncode design life,the crankshaft,guide rod and other key components of fatigue strength are verified to meet the actual production needs.The thesis provides a theoretical basis for its structural optimization and manufacturing through the kinematics and dynamics analysis of mechanical non-switching directional pumping unit system.