| 摘要 |
A top-mounted digital-control tower pumping unit includes a tower frame (1), a power system (2), a drive system, a control system (3), a balance weight box (4), a balance weight positioning cable (5), a driving cable (6), a plurality of cable hangers (7) and a guide wheel mechanism. The guide wheel mechanism is fixed on an operation platform by a rotating shaft, which is convenient for the operator to move the guide wheel mechanism aside during the oil well work-over. The control system, the power system, and the drive system are all mounted closely on an operating platform on the top of the tower frame. The top-mounted digital-control tower pumping unit of the present invention has the advantages of simple structure, convenient maintenance, low cost, stable operation and small noise. |
| 主权项 |
1. A top-mounted digital-control tower pumping unit, comprising a tower frame having an operating platform, a power system, a drive system, a control system, a cable wheel, and a guide wheel mechanism,
wherein said power system, said drive system, said control system and said cable wheel are installed on said operating platform at a top of said tower frame, said control system is connected with said power system so as to control a reversing position and rotating speed of said power system, said power system is connected with said cable wheel via said drive system; wherein said guide wheel mechanism comprises a guide wheel support fastened at a side of said operating platform near said cable wheel, one end of a guide bar is installed on said guide wheel support, a rotating shaft passes through a junction of said guide bar and said guide wheel support with one end of said rotating shaft fastened within said guide bar and the other end of said rotating shaft installed within said guide wheel support, a guide wheel fixture is installed at a free end of said guide bar and a guide wheel is installed on said guide wheel fixture; wherein said cable wheel has first and second set of fastening holes, one end of a balance weight positioning cable is fastened to said first set of fastening holes and one end of a driving cable is fastened to said second set of fastening holes, with said balance weight positioning cable and said driving cable wrapped around said cable wheel in opposite directions to each other a free end of said balance weight positioning cable is connected to a balance weight box by a first cable hanger, and a free end of said driving cable is wrapped over said guide wheel and connected to a polish rod by a second cable hanger; wherein said drive system comprises a first pulley sprocket wheel fastened at an output end of said power system and driving a second pulley sprocket wheel through a transmission belt, said second pulley sprocket wheel fastened at one end of a transmission shaft and a first gear fastened at another end of said transmission shaft with said transmission shaft seated on a transmission shaft support, said first gear engaged with a second gear that is fastened on said cable wheel, a cable wheel shaft installed inside said cable wheel, two ends of said cable wheel shaft are respectively fastened on two shaft seats, said two shaft seats fastened on said operating platform. |
