Stepless speed regulation type oil pump

Abstract

The invention relates to a stepless speed regulation type oil pump which comprises an oil pump base, a vertical oil pump rack, a lifting fixed pulley, a balance fixed pulley, a lifting steel wire rope, a balance steel wire rope, a steel wire rope drum, a balance box, a switched reluctance motor and an intelligent control cabinet, two fixed pulleys, each of which is provided with two symmetrical arc-shaped grooves, are oppositely arranged at the front side and the rear side of the top of the vertical oil pump rack, the fixed pulleys are arranged on a fixed pulley frame, the fixed pulley frame is positioned in a slide way at the top of the vertical oil pump rack by a positioning pin, the lifting fixed pulley is arranged at the front side of the top of the vertical oil pump rack and the balance fixed pulley is arranged at the rear side of the top of the vertical oil pump rack; the steel wire rope drum is arranged at the horizontal middle part of the base of the vertical oil pump rack, the balance steel wire rope is connected with the balance box through the balance fixed pulley, the lifting steel wire rope is connected with a polish rod break-proof retaining poliched rod eye or a well repair lifting hook through the lifting fixed pulley; the left drum shaft of the steel wire rope drum is connected with the output shaft of a speed reducer through a coupler; the output shaft of the speed reducer is connected with the shaft of the switched reluctance motor; and a PLC (Programmable Logic Control) system is arranged in the intelligent control box.

Description

technical field [0001] The invention relates to an oil field development and production equipment, in particular to a stepless speed regulation type pumping unit. Background technique [0002] At present, mechanical oil recovery generally adopts beam pumping unit or flexible transmission pumping unit (200510043367.2). However, the beam pumping unit has a large structure, low efficiency, and inconvenient parameter adjustment; compared with the beam pumping unit, the existing flexible transmission pumping unit has little efficiency improvement, and because its transmission material is generally a rubber belt or Steel wire ropes have their own insurmountable shortcomings: the rubber belt is easy to stick when exposed to heat, and easy to harden when exposed to cold. At the same time, when the wind is strong, due to the large wind area, it often shakes with the wind, which is easy to damage the wellhead, and the scope of application is narrow; When the tension is released in th...

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Problems solved by technology

However, the beam pumping unit has a large structure, low efficiency, and inconvenient parameter adjustment; compared with the beam pumping unit, the existing flexible transmission pumping unit has little efficiency improvement, and because its transmission material is generally a rubber belt or Steel wire ropes have their own insurmountable shortcomings: the rubber belt is easy to stick when exposed to heat, and easy to harden when exposed to cold. At the same time, when the wind is strong, due to the large wind area, it often shakes with the wind, which is easy to damage the wellhead, and the scope of application is narrow; When the tension is released in the same direction twisted steel wire rope, the steel wire rope is easy to twist, and the alternating twisted steel wire rope has poor flexibility and short service life

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