Flywheel energy storage oil pumping machine

[0037]Referring to FIG. 1, a flywheel energy storage oil pumping machine comprises an electric motor 1 and a control device 3, and further comprises a rotary spindle 2, a lifting roller 4, a roller drive wheel 6, an energy adjustment flywheel 7, a transmission 8, and an energy feedback device 9. The control device 3 comprises a PLC (Programmable Logic Controller), a position switch, a connection cable, etc., and is used for controlling the action of the whole oil pumping machine. The electric motor 1 may be a general electric motor or a variable-frequency electric motor. The rotary spindle 2 is an integral spindle. Of course, the rotary spindle 2 may be one formed by integrating a plurality of split spindles via couplers or by welding or other manners.

[0038]The electric motor 1 drives the rotary spindle 2 to rotate. The lifting roller 4 is connected to a sucker rod (not shown) via a soft connector. The sucker rod is driven to rise by the forward rotation of the lifting roller 4, whi...

[0042]Referring to FIG. 2, in this embodiment, the energy feedback device 9 is of another structure, and the transmission 8 will be changed in structure with the structure change of the energy feedback device 9. The energy feedback device 9 comprises a rotating shaft 907, a first drive wheel 903 and a second drive wheel 904. The transmission 8 is a multi-stage transmission, and further has a plurality of connecting ends other than the high-speed end and the low-speed end. The connecting shaft of one of the connecting ends is fixedly connected to the rotating shaft 907. Of course, the rotating shaft 907 may be a part extending from the connecting end. The rotating shaft 907 is connected to the second drive wheel 904 via an energy feedback clutch 905, wherein, the energy feedback clutch 905 is a sprag overrun clutch. The first drive wheel 903, the second drive wheel 904 and the roller drive wheel 6 are gears. The first drive wheel 903 is positioned between the roller drive wheel 6 and...

[0043]Referring to FIG. 3, the energy feedback device 9 comprises a drive shaft 901. The drive shaft 901 is connected to a first drive wheel 903 via an energy feedback clutch 905. The transmission 8 further has a plurality of connecting ends other than the high-speed end and the low-speed end. The connecting shaft of one of the connecting ends is fixedly connected to the drive shaft 901. Of course, the drive shaft 901 may be a part extending from the connecting end. The energy feedback clutch 905 is an overrun clutch. The first drive wheel 903 is connected to the roller drive wheel 6 via a driving belt 906. The remaining is the same as Embodiment 2.