行星齿轮抽油机的设计构想

Design scheme for planetary gear pumping unit

综述了我国长冲程、低冲次抽油机的发展概况，提出了行星齿轮抽油机的设计构想并阐述了这种抽油机的主要结构和工作过程。在此基础上，详细推导出行星齿轮抽油机的扭矩计算公式，并与常规型游梁式抽油机的扭矩计算公式进行了对比。认为行星齿轮抽油机与无游梁抽油机一样，可以实现长冲程或超长冲程，具有结构紧凑、体积小、重量轻和移运方便的特点，它克服了无游梁抽油机在换向方面存在的弊端，具有换向可靠性高和使用寿命长等优点。

The development of long stroke pumping units in China is overviewed. The design scheme for a planetary gear pumping unit is put forward, and the design feature and working principle of this new unit are expounded. The equation for calculating the torque of the new unit is worked out, and it is compared with that of conventional beam pumping unit. The authors think that the planetary gear pumping unit can work with long stroke or ultra-long stroke as the blue ele phant, it is characterized by impact structure, small size, light weight and good mobility, and it provides highly reliable reverse and has long service life.