CN108880178A - Multistage linear motor and its oil well pump - Google Patents
Multistage linear motor and its oil well pump Download PDFInfo
- Publication number
- CN108880178A CN108880178A CN201810730792.6A CN201810730792A CN108880178A CN 108880178 A CN108880178 A CN 108880178A CN 201810730792 A CN201810730792 A CN 201810730792A CN 108880178 A CN108880178 A CN 108880178A
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- China
- Prior art keywords
- linear motor
- mover
- oil well
- well pump
- stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
- F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Linear Motors (AREA)
Abstract
The present invention provides a kind of multistage linear motor and its oil well pump, including upper oil well pump, multistage linear motor and lower oil well pump, single-stage linear motor is separately connected other level-one single-stage linear motor by stator transition joint and mover transition joint to be combined into multistage linear motor；The stationary part of two single-stage linear motors is linked together by stator transition joint, and the subpart of two single-stage linear motors is linked together by mover transition joint, and subpart is placed in the inner hole of stationary part.Multistage linear motor and its oil well pump in the present invention, arrange oil well pump up and down, under the premise of linear motor pushing force is certain, substantially increase oil pump capacity, improve electric efficiency；It the advantage is that the difficulty of processing for reducing linear motor part, reduce production cost, reliably improve linear motor pushing force, it is able to satisfy various duty requirements, motor reliability and efficiency are improved, the shock of linear motor and oil well pump moving component is effectively prevented, is easily installed maintenance.
Description
Technical field
The present invention relates to technical field of petroleum extraction, more particularly to a kind of multistage linear motor and its oil well pump.
Background technique
Among the advantages that linear motor and its oil well pump energy-efficient with its promoting the use of.But go out in practical applications
Existing (1) linear motor pushing force is small, and it is past that use scope is limited (2) linear motor processing cost height, unreliable (3) linear motor of quality
Speed is uneven when moving again, and linear motor electric current frequently changes, and motor fever (4) linear motor sealing is bad, burns motor (5)
The problems such as linear motor and its oil well pump are also easy to produce shock.Limit the large scale application of linear motor and its oil well pump.
In fact, patent 201010269275.7《A kind of cylinder oil immersion line motor and latent oil formula linear oil pumping machine》In just say
It crosses, oil immersion line motor is limited by oil well size, and thrust is also restricted accordingly, causes its thrust smaller.Using straight
Line motor stator portion is made of stator outer tube+coil+stator inner tube；Linear motor rotor part by magnet protective case+magnet+
The mode of stator inner tube composition improves power of motor.This mode is increased to the linear motor pushing force of unit length,
But it is very limited for improving after all, cannot at double.Increase exponentially linear motor pushing force will constantly increase length (
Under the premise of linear motor outer diameter is constant), original underground oil immersion line motor is just very long, and generally at 10 meters or so, length is not
Disconnected increase results in the increase of motor difficulty of processing, or even is difficult to, and the difficulty of motor assembly is consequently increased, and motor quality is just
Unstable, failure rate is just high；Stator inner tube, magnet protective case especially in the patent formula by linear motor air gap because wanted
The limitation asked, wall thickness are natively very thin (usually<1mm), moreover also very high to its straightness, circularity, wear-resisting requirement, length increases
Add on processing assembling influence it is very big, usually because machining accuracy influence, it may appear that stator inner sleeve and mover magnet protective case phase
Mutual friction causes electrical fault.Patent 201710674677.7《A kind of oil immersion line motor》Disclosed stationary part is divided into more
Section, stator core pipe, stator pipe nipple are welded on stator terminal and covered, but high temperature when welding is easy to puncture assembled stator department
Sub-coil, there are hidden danger of quality, are disposably welded and are not easy to safeguard；Its subpart is also segmentation connection simultaneously, but to dynamic
How sub-portion divided magnetic ring etc. seals no solution, and most importantly motor housing (stator outer tube) is still very long, exists and adds
Work assembles difficulty, and the cooling problem of submersible motor does not also solve；To solve the collision such as electric mover in the bottom of submersible motor
Equipped with buffer spring.
Patent 201510208190.0《A kind of oil immersion line motor and its mover》Exactly in order to solve mover housing and fixed
Friction between sub- inner tube and to opening oil groove on hollow mover inner cylinder and magnet, it is secondary to reach lubrication mover, stator friction
Effect, but lubricating oil probably penetrates into inside stator coil and causes short circuit.There are also patents 201721109746.1《One kind is latent
Linear electric machine with oil mover magnet steel safeguard structure》Fixation and the encapsulating method of a kind of mover magnet protective case are provided, but magnet is protected
Sheath is very thin, limited strength, is difficult to accomplish that necking is not opened, and necking just loses seal protection function once opening.
To solve the problems, such as that linear motor pushing force is small, patent 201010617157.0《Single-side parallel linear motor combination drives
Dynamic belt type pumping unit》It drives the method for loaded work piece jointly using more linear electric motor in parallel, but down-hole linear motor is taken out
Oil pump is not suitable for.Patent 200920014565.X《The oil rig of plurality of linear motor pumps combination》Using plurality of linear motor pumps
The scheme being used in series relies on classification pressurization to realize the needs of high thrust.But bring the pump more poor reliability of multiple faults point
Disadvantage.
To improve linear motor performance and extracting device of oil service life, patent 201611227260.8《A kind of down-hole linear motor
Double-action reciprocating oil-well pump device》It is touched simultaneously using linear motor rotor by connecting double-acting pump in linear motor upper end
Current distortion when hitting adjusts motor operation position, reduces system collision.But there is no offers fundamentally to avoid electricity
The method of machine collision, also without solving the problems, such as that motor is had a fever.Motor upper end connects double acting sucker rod pump simultaneously, and oil well pump is necessary
Using annular plate valve or eccentrically arranged valve, pump sucking is influenced very big.Patent 201720563944.9《A kind of reciprocal black soy sauce oil of electrical submersible
Pump》Although arranging single-acting oil well pump above and below motor, the flowline of its lower end oil well pump will be around outside linear motor
Top oil pipe is guided to, down-hole casing size is very limited, is difficult have space to lay out oil pipe outside linear motor.
Patent 201721180369.0《Oil immersion line motor oil well pump》Reduced suffered by pump barrel using upper and lower buffer spring
Impact force.Patent 201410726053.1《A kind of sealing device for latent oil reciprocating pump oil extraction system》It is also in motor
Sub- lower end installation buffer spring collides to reduce, and also electric mover and external contact is separated using rubber bellows, in ripple
Interior glossy lubricating oil is managed to lubricate mover, but lubricating oil is likely to enter stator coil, causes electrical fault.There are also so protection is dynamic
Son can bring motor radiating difficult, lead to motor fever problem.
Patent 201621042805.3《A kind of sealer of oil immersion line motor》Direct sealed electric-motor mover can be to mover
It causes to wear.
Summary of the invention
The object of the present invention is to provide a kind of multistage linear motor and its oil well pumps, above-mentioned of the existing technology to solve
Problem meets various duty requirements to improve linear motor pushing force, reduces production cost, improves motor reliability, prevents from pumping
Pump is hit, and facilitates installation maintenance.
To achieve the above object, the present invention provides following schemes：The present invention provides a kind of multistage linear motor and its pumping
Oil pump, including upper oil well pump, multistage linear motor and lower oil well pump, single-stage linear motor pass through in stator transition joint and mover
Between connector be separately connected other level-one single-stage linear motor to being combined into the multistage linear motor；Two single-stage straight lines
The stationary part of motor is linked together by the stator transition joint, and the subpart of two single-stage linear motors is by institute
It states mover transition joint to link together, the subpart is placed in the inner hole of the stationary part.
Preferably, the stationary part includes stator outer cylinder, coil windings, stator sheath and patchboard, the coil around
Group is placed between the stator outer cylinder and stator sheath, and there is the patchboard at the both ends of the coil windings；The mover portion
Divide including mover inner cylinder, soft magnetism ring, mover sheath, tapered sleeve and sealing ring, the inner hole of the mover sheath and the mover inner cylinder
The soft magnetism ring is equipped between outer circle, the both ends of the soft magnetism ring are equipped with the tapered sleeve, and necking is distinguished at mover sheath both ends
On the tapered sleeve, the mover transition joint is threadedly coupled with mover inner cylinder, and institute is equipped between the end face of two mover inner cylinders
State sealing ring；Have that there are gaps between the stator sheath and the mover sheath.
Preferably, the stator transition joint includes fitting body, nut, snap ring, graphite annulus and O-ring living, described in two
There is on the cylinder at the fitting body both ends on the cylinder at the both ends of the fitting body outer seal sleeve in nut O-ring living
The slot of the snap ring is installed, the snap ring be in divide the structures of two halves, the graphite annulus is mounted on the internal bore groove of the fitting body
In, the graphite annulus and the mover sheath are in sealing contact；The nut living is threadedly coupled with the stator outer cylinder.
Preferably, 3 connecting terminals are evenly equipped in the fitting body, the fitting body inner hole is coated with bearing metal, institute
It states bearing metal and graphite annulus flexible and provides positioning and guiding to the subpart.
Preferably, uniformly distributed there are three binding post on the patchboard, the hole of the binding post in the outer part be the coil around
The wiring hole of group, the hole of the binding post in the inner part is plugged with the connecting terminal in the fitting body.
Preferably, the upper oil well pump includes pillar on mover, upper plug, upper plug pillar, upper pump barrel and oil collecting pipe, institute
It states pillar on mover to connect by upper plug sealing B with upper plug pillar one end, the upper plug pillar other end passes through upper prop
Plug sealing A is connect with upper pump barrel, oil outlet is provided on the upper plug pillar, and be connected to the oil collecting pipe by fuel-displaced flat tube
After lead to oil pipe, fixed valve is provided in the upper pump barrel, is provided with upward-traveling valves in the upper plug.
Preferably, the lower oil well pump includes pillar under mover, lower plunger, lower plunger pillar and lower pump barrel, the mover
Lower pillar seals A by lower plunger and connect with described lower plunger pillar one end, and the lower plunger pillar other end passes through lower plunger
Sealing B is connect with the lower pump barrel, and lower fixed valve is provided in the lower pump barrel, is provided with lower travelling valve in the lower plunger.
Preferably, the subpart, upper plug and lower plunger are hollow structure, and the diameter of the lower plunger is not less than
The diameter of the upper plug.
Preferably, stator top connection one end is connect with the stator outer cylinder, and the other end is connected with pillar on the mover, institute
Stating on the outside of stator top connection has cable connector；Stator lower contact one end is connect with the stator outer cylinder, the other end and the mover
Lower pillar is connected.
Preferably, there is mover coupling at the both ends of the subpart, and what is connect with the mover coupling is that flexibility connects
The mover coupling of head, top is connect by the flexible joint with the upper plug, the mover coupling of lower part
It is connect by the flexible joint with the lower plunger；The flexible joint by both ends collar nut, elastic and high intensity
Rubber composition, multiple elastics are connected with the collar nut at both ends, the multiple bullets being connected
Property column and both ends the collar nut again with the high-strength rubber vulcanization be an entirety.
The present invention achieves following technical effect compared with the existing technology：
Multistage linear motor and its oil well pump in the present invention, arrange oil well pump up and down, certain in linear motor pushing force
Under the premise of, oil pump capacity is substantially increased, electric efficiency is improved.
The advantage of the invention is that reducing the difficulty of processing of linear motor part, production cost is reduced, it is reliable to improve
Linear motor pushing force is able to satisfy various duty requirements, improves motor reliability and efficiency, effectively prevents linear motor and pumping
The shock of oil pump moving component is easily installed maintenance.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is multistage linear motor and its oil well pump schematic diagram；
Fig. 2 is multistage linear motor and its oil well pump structural schematic diagram；
Fig. 3 is multistage linear motor and its structural segmented schematic diagram a of oil well pump；
Fig. 4 is multistage linear motor and its structural segmented schematic diagram b of oil well pump；
Fig. 5 is multistage linear motor and its structural segmented schematic diagram c of oil well pump；
Fig. 6 is multistage linear motor and its structural segmented schematic diagram d of oil well pump；
Fig. 7 is stator transition joint schematic diagram a；
Fig. 8 is stationary part patchboard schematic diagram；
Fig. 9 is subpart schematic diagram；
Figure 10 is single-stage linear motor rotor partial schematic diagram；
Figure 11 is single-stage linear motor stator electric partial schematic diagram；
Figure 12 a and 12b are multistage linear motor and its oil well pump stress analysis schematic diagram；
Wherein, the upper oil well pump of A；B multistage linear motor；Oil well pump under C；1 oil collecting pipe；Fixed valve on 2；Pump barrel on 3；Under 4
Travelling valve；5 upper plugs；6 fuel-displaced flat tubes；7 upper plug pillars；8 upper plugs seal A；8.1 upper plugs seal B；Pillar on 9 movers；
10 stator top connections；11 stationary parts；111 stator outer cylinders；112 coil windings；113 stator sheaths；12 subparts；121 is dynamic
Sub- coupling；122 mover sheaths；123 soft magnetism rings；124 sealing ring A；125 tapered sleeves；126 sealing ring B；127 mover transition joints；
128 mover inner cylinders；129 flexible joints；129.1 collar nut；129.2 elastic；129.3 high-strength rubber；Among 13 stators
Connector；131 fitting bodies；1310 bearing metal；132 connecting terminals；133 graphite annulus；134 patchboards；1341 binding posts；1341.1
Coil windings wiring hole；1341.2 terminals sub-aperture；135 nuts living；136O type circle A；137O type circle B；138 snap rings；14；Stator
Lower contact；Pillar under 15 movers；16 lower plungers seal A；16.1 lower plungers seal B；17 lower plunger pillars；18 lower plungers；Under 19
Pump barrel；20 lower travelling valves；21 lower fixed valves；The 22 flaring conical surfaces；The 23 necking conical surfaces.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of multistage linear motor and its oil well pumps, above-mentioned of the existing technology to solve
Problem meets various duty requirements to improve linear motor pushing force, reduces production cost, improves motor reliability, prevents from pumping
Pump is hit, and facilitates installation maintenance.
Multistage linear motor and its oil well pump provided by the invention, including upper oil well pump, multistage linear motor and lower oil pumping
Pump, single-stage linear motor by stator transition joint and mover transition joint be separately connected other level-one single-stage linear motor thus
It is combined into multistage linear motor；The stationary part of two single-stage linear motors is linked together by stator transition joint, two lists
The subpart of grade linear motor is linked together by mover transition joint, and subpart is placed in the inner hole of stationary part.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Please refer to Fig. 1-12, wherein Fig. 1 is multistage linear motor and its oil well pump schematic diagram；Fig. 2 is multistage linear motor
And its oil well pump structural schematic diagram；Fig. 3 is multistage linear motor and its structural segmented schematic diagram a of oil well pump；Fig. 4 is multistage linear
Motor and its structural segmented schematic diagram b of oil well pump；Fig. 5 is multistage linear motor and its structural segmented schematic diagram c of oil well pump；Fig. 6
For multistage linear motor and its structural segmented schematic diagram d of oil well pump；Fig. 7 is stator transition joint schematic diagram a；Fig. 8 is stator department
Tap drum schematic diagram；Fig. 9 is subpart schematic diagram；Figure 10 is single-stage linear motor rotor partial schematic diagram；Figure 11 is single
Grade linear motor stator electric partial schematic diagram；Figure 12 is multistage linear motor and its oil well pump stress analysis schematic diagram.
As shown in figs. 1-12, the present invention provides a kind of multistage linear motor and its oil well pump, including upper oil well pump A, multistage
Linear motor B and lower oil well pump C.Stationary part 11 and subpart 12 form single-stage linear motor；The linear motor of single-stage is logical
Cross stator transition joint 13, mover transition joint 127 is separately connected other level-one single-stage linear motor combination into multistage linear electricity
Machine.
The stationary part 11 of single-stage linear motor is by stator outer cylinder 111, coil windings 112, stator sheath 113, patchboard
134, stator transition joint 13 forms；The subpart 12 of single-stage linear motor is protected by mover inner cylinder 128, soft magnetism ring 123, mover
Set 122, tapered sleeve 125, mover transition joint 127 form；The stationary part 11 of every two single-stage linear motor is by indirect in stator
First 13 link together；The subpart 12 of every two single-stage linear motor is also linked together by mover transition joint 127.
Stator transition joint 13 is by fitting body 131, nut 135, snap ring 138, patchboard 134, graphite annulus 133, O-ring living
Composition；There are 3 uniformly distributed connecting terminals 132,131 inner hole of fitting body to be coated with bearing metal 1310 in fitting body 131, it is flexible
Graphite annulus 133 is mounted in the internal bore groove of fitting body 131, and graphite annulus 133 and mover sheath 122 are in sealing contact, and is protected to mover
122 lubrication of set；Further stator sheath 113 is not contacted with mover sheath 122, between have small―gap suture H, avoid mover sheath
122 with the abrasion of stator sheath 113, substantially increase the reliability of motor.2 nut 135 O-ring A136 and O-rings living
Outer seal sleeve has installation snap ring 138 on the cylinder at the both ends of fitting body 131 in B137 on the cylinder at 131 both ends of fitting body
Slot, snap ring 138 be in divide two halves；Snap ring 138, which limits nut 135 living and can only rotate, is unable to axial motion；Nut 135 living
When connecting with stator outer cylinder 111, nut 135 only living is rotation, and stator outer cylinder 111 and other parts do not rotate only axial
It is mobile, it reliably ensure that the grafting of connecting terminal 132 Yu 1341 inboard aperture of binding post.Bearing metal 1310 and graphite annulus
133 give 12 positioning and guiding of subpart, it is ensured that the plunger up and down connecting with mover coaxially moves back and forth.Nut 135 and stator living
Outer cylinder 111 is threadedly coupled, and coil windings 112 are placed between stator outer cylinder 111 and stator sheath 113, the both ends of coil windings 112
There is a patchboard 134, uniformly distributed on patchboard 134 there are three binding posts 1341, and the hole of binding post 1341 in the outer part is coil windings
Wiring hole 1341.1, the hole of binding post 1341 in the inner part are terminals sub-aperture 1341.2, terminals sub-aperture 1341.2 and fitting body
Connecting terminal 132 on 131 plugs；113 both ends of stator sheath have flaring the conical surface 22 and fitting body 131 on male cone (strobilus masculinus) and
Inner conical surface compression clamping on patchboard 134 is fixed, and ensure that stator sheath 113 is flared indeformable and reliable sealing.It ensures
The sealing of stationary part 11 has prevented crude oil etc. and has damaged to the corrosion of mover coil etc. and insulation, avoided due to insulated enclosure
Burn motor.
Subpart 12 is placed in the inner hole of stationary part 11, between 128 outer circle of 122 inner hole of mover sheath and mover inner cylinder
There is soft magnetism ring 123, the both ends of soft magnetism ring 123 are equipped with tapered sleeve 125, and mover transition joint 127 is threadedly coupled with mover inner cylinder 128,
There is sealing ring B126 between the end face of two mover inner cylinders 128, there is an inner conical surface at 127 both ends of mover transition joint, in mover indirectly
First 127 inner conical surface and 125 conical surface of tapered sleeve and 23 compression clamping of the mover pillar necking conical surface seal, 122 both ends of mover sheath point
Other necking is equipped between 125 end face of 127 end face of mover transition joint and tapered sleeve on tapered sleeve 125.Sealing ring A124, sealing
Enclose the multiple-sealed of the composition of the necking conical surface 23 of B126 and mover sheath 122, it is ensured that the sealing of subpart 12 has prevented original
The corrosion and damage to subpart 12 such as oil.
Single-stage linear motor stator electric part 11 and single-stage linear motor rotor part 12 form single-stage linear motor.Single-stage is straight
Line motor be separately connected by stator transition joint 13, mover transition joint 127 another single-stage linear motor stationary part 11,
Subpart 12 can be combined into multistage linear motor B.Multistage linear motor B is in limited underground size, by step by step
Increase motor series, increase linear motor pushing force, solves stator outer cylinder 111, stator sheath 113, mover sheath 122, moves
Sub- inner cylinder 128 etc. processes the difficulty of assembling because caused by length is too long, stabilizes linear motor quality, greatly reduces straight line
The cost of motor is also convenient for underground installation maintenance.
10 one end of stator top connection is connect with stator outer cylinder 111, stator top connection 10 connect with stator outer cylinder 111 one end with
It is the same, 10 other end of stator top connection and 9 phase of pillar on mover that stator transition joint 13, which connect one end with stator outer cylinder 111,
Even, there is cable connector on the outside of stator top connection 10.14 one end of stator lower contact is connect with stator outer cylinder 111, stator lower contact 14
It is the same that the one end connecting with stator outer cylinder 111, which connect one end with stator outer cylinder 111 with stator transition joint 13,；It is connect under stator
First 14 other end is connected with pillar 15 under mover.
There is mover coupling 121 at the both ends of subpart 12, and what is connect with mover coupling 121 is flexible joint 129, on
The mover coupling 121 in portion is connect by flexible joint 129 with upper plug 5, and the mover coupling 121 of lower part passes through flexible joint
129 connect with lower plunger 18.Flexible joint 129 is made of the collar nut, elastic 129.2, high-strength rubber 129.3 at both ends
, multiple elastics 129.2 are connected with the collar nut at both ends, the multiple elastics 129.2 being connected and two
The collar nut at end is again an entirety, the inner reinforcing steel wire of high-strength rubber 129.3 with the vulcanization of high-strength rubber 129.3.By
Flexible joint 129 connects mover and plunger, because flexible joint 129 can be axial not in radial micro swing after stress
It is dynamic, the influence such as eccentric wear caused by not moved in coaxial is avoided, while also reducing stator sheath 113, mover sheath 122, plunger
The difficulty of processing of equal components.
Upper oil well pump by pillar on mover, upper plug 5, upper plug sealing A8, upper plug sealing B9, upper plug pillar 7, on
Pump barrel 3, upward-traveling valves, upper fixed valve 2, fuel-displaced flat tube 6, oil collecting pipe 1 form.
The pillar other end seals B9 by upper plug and connect with 7 one end of upper plug pillar on mover, and upper plug pillar 7 is another
End seals A8 by upper plug and connect with upper pump barrel 3, oil outlet is provided on upper plug pillar 7, and pass through fuel-displaced flat tube 6 and collection
Lead to oil pipe after 1 connection of oil pipe, having in upper fixed valve 2, upper plug 5 in upper pump barrel 3 there are upward-traveling valves.
Lower oil well pump seals B16.1, lower plunger by pillar 15, lower plunger 18, lower plunger sealing A16, lower plunger under mover
Pillar 17, lower pump barrel 19, lower travelling valve 204, lower fixed valve 21 form.
15 other end of pillar seals A16 by lower plunger and connect with lower 17 one end of plunger pillar under mover, lower plunger pillar
17 other ends seal B16.1 by lower plunger and connect with lower pump barrel 19, and having in lower fixed valve 21, lower plunger 18 in lower pump barrel 19 has
Lower travelling valve 204.
Upper oil well pump A, lower oil well pump B and conventional single-action plunger piston oil well pump are essentially the same.
Upper and lower plunger sealing is made of threaded seal and seal assembly, and seal assembly selects mature crude oil medium
Reciprocal high-pressure self-sealing formula sealing, seal assembly are sealed with upper and lower plunger contact without contacting with mover respectively, and crude oil is avoided to enter
Linear motor ensure that the reliability of linear motor, while seal assembly has also carried out secondary seal to upper and lower plunger, and normal
Rule oil well pump is compared, and the oil pumping efficiency of pump is greatly improved.
Subpart 12, upper and lower plunger be all it is hollow, not only reduce reciprocating part (subpart 12 and upper lower prop
Plug) weight, improve pump efficiency, and crude oil constantly flows through the heat that hollow mover has taken away motor generation, ensure that motor
It has no temperature.
Arrangement oil well pump A, B up and down, it is fuel-displaced up and down under the premise of multistage linear motor thrust is constant, not only increase greatly
Add oil pump capacity, improves electric efficiency；Hydraulic resistance balance principle is more importantly utilized, the gravity of reciprocating part is balanced,
Electric current when moving back and forth linear motor is essentially the same, prevents motor from having a fever, and retardation motion part is hit.
As shown in figure 12, multistage linear motor and its oil pumping pump work when linear motor rotor force analysis：
18 diameter of plunger, F multistage linear motor thrust, G reciprocating part under Ps pump intake pressure, Pc fuel pump outlet pressure, D
Gravity, f frictional force, Gy+ and Gy- are the 5 chamber liquid gravity of upper plug of variation, 5 diameter of d upper plug
When 12 up stroke of subpart, lower travelling valve 204 is closed, lower fixed valve 21 is opened, and oil enters lower 18 cavity volume of plunger, on
Travelling valve is opened, upper fixed valve 2 is closed, and oil enters fuel-displaced flat tube 6 through 5 hollow pipe of upper plug and is discharged to oil collecting pipe 1.
F=π/4d2Pc-π/4D2Ps+G-f+△Gy-(a)
When mover down stroke, lower travelling valve 204 is opened, lower fixed valve 21 is closed, and oil is through lower plunger 18,12 hollow pipe of subpart
It flows to fuel-displaced flat tube 6 to be discharged to oil collecting pipe 1, upward-traveling valves close, upper fixed valve 2 opens oil and enters 5 cavity volume of upper plug.
F=π/4D2Pc-π/4d2Ps-G-f-△Gy+(b)
When the optimal working condition of linear motor is about 12 stroke of subpart, motor thrust F is equal, to guarantee
The stabilization of current of electric also ensures mover reciprocating part to run smoothly not and collides.
So π/4d2Pc-π/4D2Ps+G-f+ △ Gy-=π/4D2Pc-π/4d2Ps-G-f-△Gy+
(Gy+, Gy- are comparatively small, ignore)
d2≦D2-8G/π(Pc+Ps)(1)
When oil well pump installation site determines, it is known that：Ps, Pc, D, F, G (can be by upper and lower when 5 diameter of upper plug is uncertain
The equal primary Calculation of diameter of plunger), Gy+ and Gy- (ignoring).
As power failure F=0 for some reason, also to guarantee that reciprocating part is not hit up and down, be obtained according to formula (a) (b)：
(D2Ps-4G/π)/Pc<d2<(D2Pc-4G/π)/Ps(2)
The 5 diameter d of upper plug primarily determined using formula (1), it is also necessary to meet formula (2).
For subsidiary company (1) as can be seen that diameter of plunger is different up and down, lower 18 diameter of plunger must not drop below upper plug 5
Diameter, and the relationship of diameter of plunger has to comply with the requirement of formula (2) up and down；Simultaneously it can also be seen that reciprocating part weight
Power is very big on linear motor pushing force F influence, and subpart 12, upper and lower plunger weight are the smaller the better.
Formula (1) (2) is only for Vertical Well.For horizontal well G=0 so d=D.For inclined shaft, G then need into
Row decomposes.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (10)
1. multistage linear motor and its oil well pump, it is characterised in that：Including upper oil well pump, multistage linear motor and lower oil well pump,
Single-stage linear motor is separately connected other level-one single-stage linear motor by stator transition joint and mover transition joint to group
Synthesize the multistage linear motor；The stationary part of two single-stage linear motors is connected to one by the stator transition joint
It rises, the subpart of two single-stage linear motors is linked together by the mover transition joint, and the subpart is set
In the inner hole of the stationary part.
2. multistage linear motor according to claim 1 and its oil well pump, it is characterised in that：The stationary part includes fixed
Sub- outer cylinder, coil windings, stator sheath and patchboard, the coil windings are placed between the stator outer cylinder and stator sheath,
There is the patchboard at the both ends of the coil windings；The subpart includes mover inner cylinder, soft magnetism ring, mover sheath, cone
Set and sealing ring are equipped with the soft magnetism ring, the soft magnetism ring between the inner hole of the mover sheath and the mover inner cylinder outer circle
Both ends be equipped with the tapered sleeve, necking is distinguished on the tapered sleeve in mover sheath both ends, the mover transition joint and dynamic
Sub- inner cylinder is threadedly coupled, and the sealing ring is equipped between the end face of two mover inner cylinders；The stator sheath and the mover protect
Have that there are gaps between set.
3. multistage linear motor according to claim 2 and its oil well pump, it is characterised in that：The stator transition joint packet
Fitting body, nut, snap ring, graphite annulus and O-ring living are included, outer seal sleeve is in the connector in two nut O-rings living
On the cylinder at the both ends of body, there is the slot for installing the snap ring on the cylinder at the fitting body both ends, the snap ring be in be divided to two
Half structure, the graphite annulus are mounted in the internal bore groove of the fitting body, and the graphite annulus connects with mover sheath sealing
Touching；The nut living is threadedly coupled with the stator outer cylinder.
4. multistage linear motor according to claim 3 and its oil well pump, it is characterised in that：It is evenly equipped in the fitting body
3 connecting terminals, the fitting body inner hole are coated with bearing metal, and the bearing metal and graphite annulus flexible give the mover
Part provides positioning and guiding.
5. multistage linear motor according to claim 4 and its oil well pump, it is characterised in that：It is evenly equipped on the patchboard
Three binding posts, the hole of the binding post in the outer part be the coil windings wiring hole, the hole of the binding post in the inner part with
Connecting terminal in the fitting body plugs.
6. multistage linear motor according to claim 1 and its oil well pump, it is characterised in that：The upper oil well pump includes dynamic
Pillar, upper plug, upper plug pillar, upper pump barrel and oil collecting pipe on son, pillar passes through upper plug and seals B and upper prop on the mover
The connection of pillar one end is filled in, the upper plug pillar other end seals A by upper plug and connect with upper pump barrel, the upper plug pillar
On be provided with oil outlet, and lead to oil pipe after being connected to by fuel-displaced flat tube with the oil collecting pipe, be provided in the upper pump barrel solid
Determine valve, is provided with upward-traveling valves in the upper plug.
7. multistage linear motor according to claim 6 and its oil well pump, it is characterised in that：The lower oil well pump includes dynamic
Son descends pillar, lower plunger, lower plunger pillar and lower pump barrel, and pillar passes through lower plunger sealing A and the lower plunger under the mover
The connection of pillar one end, the lower plunger pillar other end seals B by lower plunger and connect with the lower pump barrel, in the lower pump barrel
It is provided with lower fixed valve, is provided with lower travelling valve in the lower plunger.
8. multistage linear motor according to claim 7 and its oil well pump, it is characterised in that：The subpart, upper prop
Plug and lower plunger are hollow structure, and the diameter of the lower plunger is not less than the diameter of the upper plug.
9. multistage linear motor according to claim 7 and its oil well pump, it is characterised in that：Stator top connection one end and institute
The connection of stator outer cylinder is stated, the other end is connected with pillar on the mover, has cable connector on the outside of the stator top connection；Under stator
Connector one end is connect with the stator outer cylinder, and the other end is connected with pillar under the mover.
10. multistage linear motor according to claim 7 and its oil well pump, it is characterised in that：The two of the subpart
There is mover coupling at end, and what is connect with the mover coupling is flexible joint, and the mover coupling on top passes through described
Flexible joint is connect with the upper plug, and the mover coupling of lower part is connected by the flexible joint and the lower plunger
It connects；The flexible joint is made of the collar nut, elastic and high-strength rubber at both ends, multiple elastics and both ends
The collar nut is connected, the collar nut of the multiple elastics and both ends that are connected again with it is described
High-strength rubber vulcanization is an entirety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730792.6A CN108880178B (en) | 2018-07-05 | 2018-07-05 | Oil well pump with multistage linear motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810730792.6A CN108880178B (en) | 2018-07-05 | 2018-07-05 | Oil well pump with multistage linear motor |
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| Publication Number | Publication Date |
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| CN108880178A true CN108880178A (en) | 2018-11-23 |
| CN108880178B CN108880178B (en) | 2019-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810730792.6A Active CN108880178B (en) | 2018-07-05 | 2018-07-05 | Oil well pump with multistage linear motor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2823597Y (en) * | 2005-07-18 | 2006-10-04 | 中国石化胜利油田有限公司采油工艺研究院 | Linear motor double pumping oil pumping device for downhole |
| CN102497080A (en) * | 2011-12-15 | 2012-06-13 | 哈尔滨工业大学深圳研究生院 | Moving magnet type linear rotation two-degree-of-freedom motor |
| CN104047577A (en) * | 2014-05-28 | 2014-09-17 | 河南理工大学 | Linear motor direct-driven pumping unit |
| CN107276364A (en) * | 2017-08-09 | 2017-10-20 | 日照原野机械制造有限公司 | A kind of oil immersion line motor |
-
2018
- 2018-07-05 CN CN201810730792.6A patent/CN108880178B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2823597Y (en) * | 2005-07-18 | 2006-10-04 | 中国石化胜利油田有限公司采油工艺研究院 | Linear motor double pumping oil pumping device for downhole |
| CN102497080A (en) * | 2011-12-15 | 2012-06-13 | 哈尔滨工业大学深圳研究生院 | Moving magnet type linear rotation two-degree-of-freedom motor |
| CN104047577A (en) * | 2014-05-28 | 2014-09-17 | 河南理工大学 | Linear motor direct-driven pumping unit |
| CN107276364A (en) * | 2017-08-09 | 2017-10-20 | 日照原野机械制造有限公司 | A kind of oil immersion line motor |
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| Publication number | Publication date |
|---|---|
| CN108880178B (en) | 2019-10-15 |
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