Method of raising motor efficiency in pumping unit and energy balance device therefor

Abstract

The present invention is method of raising motor efficiency of pumping unit and energy balance device therefor. The present invention features that one energy balance device is mounted between the gear box and the motor of the pumping unit. Before starting the pumping unit, the motor drives the flywheel in the energy balance device to rotate for storing energy; after the flywheel reaches certain rotation speed, the energy balance device is combined to the gear box to start the pumping unit; and after the pumping unit is started, the motor and the energy balance device drive the pumping unit together. The present invention has the features of reduced motor power, raised motor efficiency and saving in power.

Description

Technical field: [0001] The present invention relates to an energy-saving and consumption-reducing method in the field of oil field lifting, in particular, it relates to a method of applying the principle of mechanical energy storage to improve the motor efficiency of pumping units and an energy balance specially designed for implementing the method device. Background technique: [0002] The working efficiency of the existing pumping well motors in the oil field is relatively low, with an average efficiency of 50% to 70%. Since the starting torque and starting power required by the pumping unit at the moment of starting are 3 to 7 times of its average working torque and average power, the starting torque and starting power are relatively large; and the peak torque and peak power during normal operation are its average 2 to 3 times the working torque and average power. Therefore, the installed power of the pumping unit is generally determined according to the root mean squa...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of waste caused by excessively high installed power of pumping unit motors and low motor efficiency due to excessive load fluctuations, the present invention provides a method for improving the efficiency of pumping unit motors by applying the principle of mechanical energy storage. The method to improve the motor efficiency of the pumping unit based on the energy principle is to reduce the starting power of the motor by using the motor and the energy balance device to do work together when the pumping unit starts. After the pumping unit starts, the energy balance device is still used to make the load of the motor tend to be Stable, this will not only reduce the installed power of the motor of the pumping unit, but also improve the efficiency of the motor during the operation of the pumping unit to achieve the purpose of saving electricity

Images