Composite permanent magnet motor direct driven walking beam type oil pumping machine

Abstract

The invention discloses a composite permanent magnet motor direct driven walking beam type oil pumping machine. The composite permanent magnet motor direct driven walking beam type oil pumping machine comprises a composite permanent magnet motor and a control cabinet thereof, a crank, a connecting rod, a balance block, a walking beam and a horse head. Besides a surface driving system (an induction motor, a belt and a gear box), the composite permanent magnet motor direct driven walking beam type oil pumping machine has the completely same basic structure with that of a traditional walking beam type oil pumping machine. Due to the fact that the composite permanent magnet motor has the characteristics of high efficiency, low heat, high torque density, low noise and the like, and especially, a composite permanent magnet motor and a speed reducer gearbox of the same torque specification are of the same size, the composite permanent magnet motor can replace the traditional induction motor, belt and gear box on the basis of not changing the structural size of an original oil pumping machine, and thus the composite permanent magnet motor direct driven walking beam type oil pumping machine is obtained.

Description

technical field [0001] The invention relates to the field of petroleum production equipment manufacturing. Specifically, it is a beam pumping unit directly driven by a permanent magnet composite motor. Background technique [0002] The traditional beam pumping unit converts the rotary motion of the reduction box into the reciprocating linear motion of the sucker rod through the crank and connecting rod. The gearbox is generally connected by an induction motor through a belt. Because the beam pumping unit works reliably and is easy to use, it is currently the most widely used equipment in oil production equipment in oil fields. [0003] Although various new screw pump pumping units, tower reciprocating pumping units, and linear motor pumping units have appeared one after another, due to various defects, the role of beam pumping units in oil production equipment has not been changed. subject position. [0004] Although some people have carried out direct drive transformati...

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Problems solved by technology

[0004] Although some people have carried out direct drive transformation on the surface drive link of the beam pumping unit, because the reduction ratio of the gear box machine belt exceeds 150 times, it is desired to use a traditional motor to replace the induction motor of the traditional beam pumping unit. Belts and gearboxes are extremely difficult

Because its volume is much larger than that of the gearbox, and the energy saving of the system is very limited, therefore, the beam pumping unit directly driven by the traditional motor is difficult to have practical application value

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