以蓄能器平衡载荷的变频液压闭式节能抽油机

针对现有多种节能型液压抽油机均存在装机功率大、能耗高、自适应能力差等缺点,提出了一种以蓄能器平衡载荷的变频液压闭式节能抽油机。新型机具有4个技术特点: (1) 由于活塞柱塞式液压缸的特殊结构和液压蓄能器的配合使用, 在平衡抽油机大部分载荷时, 不需另外增加配重, 可减小抽油机体积、质量和占地面积; (2) 抽油机下冲程时, 与活塞柱塞式液压缸相连接的蓄能器吸收能量, 上冲程时储存在蓄能器中的能量补充载荷上行所需的能量, 大幅度降低抽油机装机功率; (3) 利用变频容积调速节能效率高, 闭式油路节省液压油, 同时大大减小液压泵站的体积; (4) 在闭式油路中采用双向液压锁可使抽油机的启停更加平稳、迅速, 其工作的稳定性和安全性更好。

An energy-saving hydraulic pumping unit with closed oil circuit

In view of the shortcomings of the existing energy-saving hydraulic pumping units, a new hydraulic pumping unit with closed oil circuit is developed, which realizes speed control by using variable frequency hydraulic technology and implements load balance with accumulator. The new unit has following technical features: (1) the unit's load is balanced by means of the accumulator and hydraulic cylinder with special structure; (2) the installed power of the unit can be reduced greatly by adopting the accumulator; (3) variable frequency speed regulation ensures good energy saving effect, and the closed oil circuit requires less hydraulic oil; (4) a bi-directional hydraulic lock in the oil circuit ensures the stability and safety of the operation of the pumping unit.