If the pumping unit is unbalanced, the counterweight and the crankbalance arm can be adjusted according to the formulas presented in this article.
当抽油机不平衡时,可以按文中的公式调整平衡块和曲柄平衡半径。
2
In view that large top torque and negative torque are produced when crankbalance (primary balance) is adopted, we present the secondary balance of beam pumping unit.