Direct drive screw pump control principle

Direct drive screw pumping door panel to operate in the frequency, frequency conversion control cabinet oil equipment start, stop, fault reset button, and running lights and adjust the motor speed potentiometer knob (Figure 3), in the field for frequency counters in real time operation.
Direct drive screw pump operation can be divided into forward running, inverter braking state and dynamic braking state.
Direct drive screw reversal characteristics
Screw driving force in the loss or downtime inversion problem exists, causing screw reversal generally two reasons: one is in the screw pump work, drive motor torque rod to pass through nearly 1000 meters to the pump , sucker inevitably produce elastic deformation and a twist angle, thus storing elastic energy when the drive motor is not driving torque, the rod will drive the opposite direction to reverse the mechanical system; another drive system is shut down, the Oil processing level difference exists, nearly 1000 meters of oil by gravity from the tubing down, the pressure level generated by the rotor screw pump will reverse.
Screw reversal may cause tripping poles, light pole bending rejection, ground drives damaged parts, may also jeopardize the safety of the operator, so reasonable solution to the inverse problem of direct drive screw is particularly important.