CN2932819Y

CN2932819Y - Rare earth permanent-magnet linear oil extractor motor

Info

Publication number: CN2932819Y
Application number: CN 200620200547
Authority: CN
Inventors: 蒋宗荣; 王英浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-21
Filing date: 2006-06-21
Publication date: 2007-08-08
Anticipated expiration: 2016-06-21

Abstract

A rare-earth magnet liner motor for pumping unit applies rare-earth permanent magnetic mover with high magnetic energy product to compose disc-shaped magnet pole fan-shaped cut with bar-shaped magnet steel by radial excitation, outer surface of the disc-shaped magnet pole is fastened with electrical steel magnetic conduction ring, the disc-shaped magnet poles are divided by magnet insulation aluminium disc and connected in series and sleeved on the outside wall of hollow shaft, the stator, a hollow shaft stator, comprises stainless inner sleeve, stator core and stator casing, two ends between the stainless inner sleeve and the stator casing is sealed structure. Three-phase winding of the stator is connected with variable-frequency power, the motor is directly bonded with oil-well pump, one end of internal hole of the hollow-shaft stator is butt-jointed with the oil-out of the pump, the other end is butt-jointed with pumping pipe, diameter of the internal hole of the hollow-shaft stator should meet requirement of the leak-free seal of the oil pipeline. The motor has advantages of high intensity power, small volume, light weight, reliable operating, convenient control, and it is applicable to direct pumping underground deep well.

Description

Rare earth permanent magnet linear oil pumping machine motor

(1) technical field

The utility model relates to a kind of drive motors of oil pumper.

(2) background technology

Existing most oil pumper is to utilize special-shaped beam pumping unit on the ground (being commonly called as the ox head pump).The frame of this oil pumper is huge, sucker rod is very long, and pumping efficiency is not high.If can directly be delivered directly on the ground through petroleum pipeline from the crude oil of oilbearing stratum surface with underground several kms, just can avoid being provided with on the ground huge pumping unit shelf and very long sucker rod, simultaneously can also improve pumping efficiency, realize the effect that deep-well is directly pumped.

(3) utility model content

The purpose of this utility model provides a kind of rare earth permanent magnet linear oil pumping machine motor, to solve directly from oilbearing stratum the crude oil of underground several kms is delivered directly to ground problem through petroleum pipeline.

Rare earth permanent magnet linear oil pumping machine motor described in the utility model, comprise stator and mover, it is characterized in that: its mover is the rare earth permanent magnet mover, the rare earth permanent magnet mover of described employing high energy product, form disk magnetic-pole by excitation mode radially with the fan-shaped cutting of bar magnet, this disk magnetic-pole outer surface tightens up with the electrical sheet magnetic guiding loop, and described disk magnetic-pole is used every magnetic aluminium dish by the centre and separated, and series connection is enclosed within on the hollow shaft outer wall one by one; Its stator is the hollow shaft stator, described hollow shaft stator comprises the stainless steel inner sleeve, is placed on stainless steel inner sleeve outer some groups of stator coils and the stator cores that built up by silicon steel sheet, is placed on stator coil and the outer stator case of stator core, and the two ends between stainless steel inner sleeve and the stator case are hermetically-sealed construction; The air gap that guaranteed mover can be free to slide between hollow shaft stator and rare earth permanent magnet mover, described three-phase stator winding coil and variable frequency power supply link; Described motor and oil well pump directly are coupled, endoporus one end of its hollow shaft stator with pump hydraulic fluid port and connect, the other end docks with oil pick-up tube, hollow shaft stator inner hole diameter must satisfy the petroleum pipeline driving fit and not have leakage.

Aforesaid a kind of rare earth permanent magnet linear oil pumping machine motor, the disk magnetic-pole of rare earth permanent magnet mover wherein and the skin of magnetic guiding loop are the preservative treatment layer of zinc-plated or nickel plating.

The utility model utilizes the powerful attraction that strong magnetic field produced (deadweight 500 times) of rare earth permanent magnet, make full use of its maximum magnetic energy product, the alternating electromagnetism field interactions that produces with AC Windings produces oscillating rectilinear motion, promotes its mover, directly drives oil well pump and pumps.Because rare earth permanent magnet linear motor power density is big, volume is little, in light weight, reliable operation, control are convenient, is adapted at work deep-well under, has realized the purpose that underground deep-well is directly pumped.

(4) description of drawings

Fig. 1 is a disk magnetic-pole structural representation of the present utility model.

Fig. 2 is a mover structural representation of the present utility model.

Fig. 3 is that stator axis of the present utility model is with the section structure schematic diagram.

Fig. 4 is the structural representation behind mover of the present utility model and the stator suit.

Fig. 5 is linear motor of the present utility model and oil well pump connection diagram.

1-electrical sheet magnetic guiding loop, 2-magnetic pole, 3-hollow shaft, 4-are every magnetic aluminium dish, 5-shaft sleeve, 6-stator case, 7-stator coil, 8-stator core, 9-stainless steel sleeve, 10-stator packing ring.11-oil well pump, 12-linear motor, 13-petroleum pipeline, 14-cable, 15-deep-well.

(5) embodiment

Structure of the present utility model can be referring to accompanying drawing.The disk magnetic-pole structure has been shown among Fig. 1, and this magnetic pole 2 cuts into fan-shaped pole by the bar magnet piece according to fan-shaped streakline.This pole radially magnetizes, and forms disk magnetic-pole then, and outer surface tightens up with electrical sheet magnetic guiding loop 1, constitutes whole magnetic pole.

The structure of mover has been shown among Fig. 2, and it is by several disk magnetic-pole 2, and the centre is used every magnetic aluminium dish 4 and separated, and series connection is enclosed within on the hollow shaft 3 and constitutes mover one by one.Describedly be enclosed within on the shaft sleeve 5 every magnetic aluminium dish 4.

Fig. 3 shows the structure of stator, and stator coil 7 concentrates winding to constitute by dish type, stator core 8 is arranged at interval therebetween, its outer stator packing ring 10 that is with.Stator core 8 builds up the stator case of packing into by silicon steel sheet.The inner surface of winding and stator core 8 is nested with wherein and is sealed by stainless steel sleeve 9, and stainless steel sleeve 9 two ends and stator case 6 sealings form stator integral body.Its stator coil divides A, B, C three-phase, passes to the three-phase alternating current variable frequency power supply.

Fig. 4 shows the structure of the mover and the stator of motor, between stator and mover air gap is arranged, guarantee that mover can be free to slide, passing to its frequency of three-phase alternating current (U, I) in ABC three phase windings of stator limit is f, produce the three-phase alternating electromagnetic field, move along axle in its resultant magnetic field, speed is V, V=60fLp rice/minute (LP is a pair of utmost point effective length), this magnetic field directly and mover limit N, s magnetic pole be coupled into closed circuit, produce axial magnetic pull Fp, it is reciprocating that Kg drives its mover, and motor is in line.

Complete machine is in series by every pair of utmost point, and its number of pole-pairs P is always determined by the required total pulling force F of oil pumper.The complete machine total length is L=PLp, and its outer diameter D depends on the well head diameter D well of deep-well 15 outward, makes linear motor 12 and annex thereof (petroleum pipeline 13, cable 14 etc.) can freely put into well (as shown in Figure 5).Rare earth permanent magnet straight line oil well pump motor is that rare earth permanent magnet linear motor 12 directly be coupled with oil well pump 11, its hollow shaft endoporus and pump hydraulic fluid port and connect, and dock with oil pick-up tube, as shown in Figure 5.

The stroke Ls rice jig frequency of oil pumper is N time/minute, then the speed V of linear motor must satisfy LsN rice/minute needs, that is:

V=LsN=60fLp rice/minute;

Linear electric motors supply frequency f=LsN/60Lp.

All the time work in stator AC magnetic field scope for satisfying mover, the stator total length L always must be that L+Ls=L is total, and the input electric power of complete machine is P1=UICOS φ, and power output is P2=KpFv, its efficiency eta=P ₂/ P ₁Kp, power coefficient COS φ is input limit power factor.

The utility model has made full use of hollow shaft stator case etc. and has made magnetic loop, the topological finite element in footpath is tied curved magnetic field and is divided skewer and optimal design, make the utilization that obtains an equitable breakdown of whole magnetic circuit, obtain maximum useful flux and minimum magnetic leakage factor, complete machine reaches high power density, peak power output, minimum volume and weight.

The mover of this motor is partly formed disk diameter to excitation pole by the fan-shaped magnetic steel ingot of excitation radially, the direct lotus root of alternating electromagnetic field that maximum magnetic flux pulling force that is produced and AC Windings produce is closed, utilize variable frequency power supply, regulate speed (υ) and direction and pulling force that its frequency (f) changes mover, directly drive oil well pump and pump.

Claims

1. a rare earth permanent magnet linear oil pumping machine motor comprises stator and mover, it is characterized in that:

Its mover is the rare earth permanent magnet mover, the rare earth permanent magnet mover of described employing high energy product, form disk magnetic-pole by excitation mode radially with the fan-shaped cutting of bar magnet, this disk magnetic-pole outer surface tightens up with the electrical sheet magnetic guiding loop, described disk magnetic-pole is used every magnetic aluminium dish by the centre and is separated, and series connection is enclosed within on the hollow shaft outer wall one by one; Its stator is the hollow shaft stator, described hollow shaft stator comprises the stainless steel inner sleeve, is placed on stainless steel inner sleeve outer some groups of stator coils and the stator cores that built up by silicon steel sheet, is placed on stator coil and the outer stator case of stator core, and the two ends between stainless steel inner sleeve and the stator case are hermetically-sealed construction; The air gap that guaranteed mover can be free to slide between hollow shaft stator and rare earth permanent magnet mover, described three-phase stator winding coil and variable frequency power supply link; Described motor and oil well pump directly are coupled, endoporus one end of its hollow shaft stator with pump hydraulic fluid port and connect, the other end docks with oil pick-up tube, hollow shaft stator inner hole diameter must satisfy the petroleum pipeline driving fit and not have leakage.

2. a kind of rare earth permanent magnet linear oil pumping machine motor as claimed in claim 1 is characterized in that: the disk magnetic-pole of rare earth permanent magnet mover and the skin of magnetic guiding loop are the preservative treatment layer of zinc-plated or nickel plating.