Ask Echometer Session 12 August 5 2020 Net Gearbox Torque

Topic: Net Torque Acting on a Gearbox There are three Methods to determine the net torque loadings on a pumping unit’s gearbox. Field cases of applying all three methods are presented along with the pros and cons of using each method. 1) Use input motor power, motor and drive efficiencies and the pumping unit speed. 2) Use surface dynamometer card and torque factors together with counterbalance moments determined from static counter balance effect, CBE, test. 3) Use surface dynamometer card and torque factors together with counterbalance moments from the crank and weights.