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Brushless DC motor for energy-saving oil extractor

A technology of brush DC motor and pumping unit, which is applied in the direction of electromechanical devices, electric components, electrical components, etc., can solve the problems of low overall efficiency, achieve effective and reliable stroke control, prevent well flushing, and reduce the possibility of effect

Active Publication Date: 2010-10-06
苏州航天林泉电机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The overall efficiency of this type of pumping unit is low, about 30%

Method used

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  • Brushless DC motor for energy-saving oil extractor
  • Brushless DC motor for energy-saving oil extractor
  • Brushless DC motor for energy-saving oil extractor

Examples

Experimental program
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Effect test

Embodiment

[0016] Embodiment: A brushless DC motor for an energy-saving pumping unit, comprising a fixed shaft 1, a stator 2 and a cylindrical outer rotor 3, the fixed shaft is fixed and passed through the stator, the stator is covered with an outer rotor, and the outer rotor and the stator There is an air gap, the two end covers 4 are respectively fixed on the two ends of the outer rotor and close the two ends of the outer rotor, the fixed shaft passes through the two end covers, the outer rotor and the two end covers can rotate around the fixed axis, and the magnetic circuit of the stator is greater than two Ten pairs of stages, the cylindrical outer rotor is fixed (adhered) with NdFeB magnets with a magnetic energy product greater than or equal to 35MGOs, so that the energy-saving brushless DC motor for pumping units reaches 1 to 35 rpm Low speed, high torque up to 9500 N m.

[0017] Two pulleys 5 are respectively fixed on the outer end faces of the two end caps of the outer rotor, an...

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Abstract

The invention discloses a brushless DC motor for an energy-saving oil extractor. As the brushless DC motor adopts a stator with a multilevel magnetic circuit and a barrel outer rotor covered with high performance NdFeB magnet, thus realizing the aims of low speed and high torque; as the structure that a belt is used to directly drive a sucker rod is adopted, the complicated drive mechanism of thecommon beam oil extractor can be omitted, the work efficiency of the oil extractor can be increased and the aim of saving energy can realized; as a Hall sensor with backup is adopted, the possibilityof changing the position sensor is greatly reduced; as the Hall sensor with backup is arranged in a bearing cap, when the sensor is replaced, a dust cap is only needed to remove without disassemblingthe electric motor and the detect of the traditional electric motor that when the position sensor is replaced, the electric motor is needed to disassemble can be avoided; and the stroke of oil extraction both adopts hardware limit and software limit so that the stroke control can be more effective and reliable and kicking can be effectively prevented.

Description

technical field [0001] The invention relates to a motor used in a petroleum pumping unit, in particular to a low-speed, high-torque brushless DC motor. Background technique [0002] At present, the commonly used pumping unit is beam type, which is composed of donkey head, lever beam, bracket, connecting rod, cam, reducer, machine base, motor, electric control cabinet, etc. The motor used in the current pumping unit It is an asynchronous machine or a permanent magnet synchronous machine. The output power of the motor drives the sucker rod to move up and down through the gear box, cam, connecting rod, donkey head, lever beam and other transmissions to realize the oil pumping function. The overall efficiency of this type of pumping unit is low, about 30%. Contents of the invention [0003] In order to overcome the above defects, the present invention provides an energy-saving brushless DC motor for pumping units. The energy-saving brushless DC motor for pumping units has the...

Claims

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Application Information

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IPC IPC(8): H02K29/00H02K1/27H02K7/10H02K5/04
Inventor 郑泽明邵启宇陈智祥欧阳江力田景王飞蒋新德顾锦元
Owner 苏州航天林泉电机有限公司
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