:采用平面连杆系统综合法构造出两种双游梁抽油机的增程与力平衡机构 ,实现了抽油机机械换向、增加冲程、平衡和减小驱动力的多项目标。针对综合后的抽油机两个增程与动力平衡机构设计方案 ,作了受力分析和冲程计算 ,推导出了抽油杆冲程、平衡重质量及驱动力计算式 ,并对各个方案作了比较。旨在提高抽油机的冲程和减小驱动力。 : By using the planar linkage system synthesis method, two extended-range and force-balance mechanisms of double-beam pumping units are constructed to achieve a number of objectives such as mechanical commutation of pumping units, increase of stroke, balance and reduction of driving force. Aiming at the design scheme of two extended range and dynamic balance mechanism of the integrated pumping unit, the stress analysis and stroke calculation are made, the formulas of sucker rod stroke, balance weight and driving force are deduced, and each scheme is made Compare Designed to increase the pumping stroke and reduce the driving force.