BEAM-PUMPING UNIT AND LINEAR MOTOR PUMPING UNIT

The beam-pumping unit converts the electrical power into rotary motion,and then converts into linear reciprocating motion through a connection rod mechanism after speed reduction.In this process,the energy loss is as high as 28%,and the starting moment is high,thus the system efficiency is usually kept below 30%.A novel linear motor pumping unit is designed,which converts the electrical power directly into linear reciprocating motion,thus simplified the mechanical transmission and effectively improved efficiency.Test shows that it can save 54% of the energy,meanwhile the dimension and weight has little increase although the stroke is lengthened.In addition,the pumping parameters can be adjusted steplessly,which is good for realizing automatic controlling and fulfilling the technical requirements for production.