Fishtailing type balance efficient and energy-saving pumping unit changing parameters automatically

Abstract

A fishtailing type balance efficient and energy-saving pumping unit changing parameters automatically is characterized in that on the basis of a conventional beam pumping unit, a fishtailing type balance assembly which can swing vertically along with a beam and can change moment of force automatically is additionally installed at the tail of the beam. When the pumping unit operates, due to the regular change of a rocker rod at the tail of a rear arm of the beam, the working state that the balance torque is large when loads are heavy and the balance torque is small when the loads are light is achieved. The fishtailing type balance efficient and energy-saving pumping unit not only has all the advantages of the conventional beam pumping unit, but also achieves the effect of reducing peak torque to save electricity.

Description

technical field [0001] The invention belongs to a kind of petroleum exploitation mechanical product, specifically an oil pumping unit which can achieve the purpose of high efficiency and energy saving through a tail-swinging dynamic pitch-variable balancing device. Background technique [0002] The traditional beam pumping unit has the advantages of simple structure, less wearing parts, high reliability, good durability, and convenient operation and maintenance. At present, beam pumping units are still widely used in countries all over the world. The disadvantage is the balance It has not yet reached the ideal state, and the vibration load is unavoidable, and it is more prominent under long-stroke conditions. In the down-stroke, the load on the motor varies greatly: during the up-stroke, the static load of the donkey head suspension point is mainly above the plug of the oil well pump. The sum of the weight of the liquid column and the weight of the sucker rod, the motor need...

AI Technical Summary

Problems solved by technology

The torque fluctuates greatly, and the balance effect of the pumping unit is not good

From the point of view of energy consumption, large net torque fluctuations will inevitably increase the power and energy consumption; from the point of view of power, the peak torque is high, in order to ensure the normal operation of the pumping unit, it is necessary to use a larger power machine, that is, an electric motor. The supporting scheme of large motor and high peak current will inevitably lead to the increase of motor loss and circuit loss

At the same time, since the motor works in the low power factor state of the large horse-drawn cart, it will also deteriorate the power supply quality of the grid

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