关键词: 弯游梁抽油机; 平衡; 游梁; 减速器; 结构; 节能

Abstract: Conventional walking-beam pumping unit is the earliest and most widely-used mechanical oil production unit. It has a series of disadvantages owing to limitation of its structure, such as bad counterbalance effect, high energy consumption, short stroke and low pumping efficiency. With the demand for energy saving and long stroke becoming increasingly high in recent years, conventional walking-beam pumping unit is no longer suitable for production of oilfields. Therefore, the family of curved beam pumping units is developed on the basis of the beam variable torque principle. Transformation of the beam shape and the equilibrium position can effectively reduce the peak torque of the decelerator’s output shaft, thus saving electric energy from 15 percent to 30 percent. This new-type energy-saving oil production equipment has the benefits of double horse-head pumping unit, good balance and energy saving, and the benefits of conventional walkingbeam pumping unit, simple structure, reliability for application, and easy operation and maintenance. It is suitable for oil production under various working conditions.

Key words: curved beam pumping unit, equilibrium, decelerator, structure, energy saving