| 摘要 |
<p>A top mounted tower type NC pumping unit comprises a tower frame (1), a power system (2), a driving system, a control system (3), a balance weight box (4), a balance weight positioning rope (5), a driving rope (6), a mule-head hanger and a guide wheel mechanism, wherein the guide wheel is fixed on an operating platform by a rotating shaft, so that the top mounted tower type NC pumping unit has the advantages of simple structure, convenient maintenance and so on.</p> |
