Technical performance characteristics
Using the variable pitch principle of the biased barbell and the balance of the crank balance to satisfy the torque change requirement of the pumping unit in the pumping process in order to reduce the peak torque of the pumping unit, and to adjust the downshift according to the change of the well condition. The weight of the barbell inherits all the advantages of conventional Chau-beam pumping units. It has a good balance effect, reliable performance, and energy saving.
