CN101409494B - Oil-submersible linear motor - Google Patents
Oil-submersible linear motor Download PDFInfo
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- CN101409494B CN101409494B CN2008102171790A CN200810217179A CN101409494B CN 101409494 B CN101409494 B CN 101409494B CN 2008102171790 A CN2008102171790 A CN 2008102171790A CN 200810217179 A CN200810217179 A CN 200810217179A CN 101409494 B CN101409494 B CN 101409494B
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Abstract
The invention discloses a submersible linear motor, comprising a stator and a rotor which motions linearly in the stator; the rotor comprises a shaft, a permanent magnetic ring, a magnetic-guiding ring and a second position limit ring; the permanent magnetic ring and the magnetic-guiding ring are arranged on the shaft in the form of array; the second position limit ring is fixedly fastened on the shaft so that axial position limiting is carried out on the permanent magnetic ring and the magnetic-guiding ring; the submersible linear motor fixedly fastens the second position limit ring on the shaft of the rotor, and the axial position limit is carried out on the permanent magnetic ring and the magnetic-guiding ring on the shaft by the second position limit ring, so that the permanent magnetic ring and the magnetic-guiding ring can be kept at the initial design, and the change of the magnetic passage and the polar moment caused by the movement of the permanent magnetic ring and the magnetic-guiding ring is avoided, thus leading the motor to work normally for a long time, thereby avoiding the detection, maintenance on the rotor and saving the expense.
Description
Technical field
The present invention relates to a kind of oil immersion line motor, be specifically related to a kind of oil immersion line motor that is used for work under the oil well.
Background technology
Known pumping unit mainly is girder-like oil pump-oil-well pump device, and complete equipment is divided into the mid portion of ground, down-hole and contact ground and down-hole, but it all is a mechanical oil recovery.Because the oil mining complicated condition is changeable, along with the continuous increase of well depth and output, this oil pumper weight shortcoming big, that accident is many, discharge capacity is low becomes very obvious, and its shortcoming is specific as follows:
1, highly energy-consuming: traditional mechanical is recovered the oil because mechanical structure is very complicated, and motor power factor is very low, generally wants between the 20%-50%; Again because long sucker rod will be arranged, the per 1000 meters elastic deformations that 0.6-1.2 rice is arranged when twitching up and down approximately of sucker rod badly influence system effectiveness.
2, be easy to generate eccentric wear: because mostly the well depth in oil field is all more than km, the generation when sucker rod is rubbed has had a strong impact on the reliability of system.
3, not environmental protection, noise is big; Because crude oil leak, can cause crude oil pollution to ocean when recovering the oil at sea.
4, system complex: system's main modular is separated separately, and system coordination is very poor, and inconvenience is controlled together.
, oil immersion line motor do not need middle drive mechanism because can being converted into straight reciprocating motion with electric energy, no matter be oil pumper to be transformed in aboveground or down-hole, all help reducing transmission mechanism bulk, the raising machine is adopted efficient, and its advantage is specific as follows:
1, the few energy of joint: oil immersion line motor mainly is mover moving linearly in stator, and its structure is very simple, and the very relative legacy system height of motor power factor is therefore energy-conservation; Because do not have long sucker rod, gear reduction and walking beam etc., system effectiveness strengthens greatly; Average energy-conservationly reach 50%, saved a large amount of energy.
2, eccentric wear free: owing to there is not long sucker rod, also just do not had the eccentric wear problem, the reliability of system strengthens greatly.
3, since motor underground, institute's heart noise is little; Owing to do not leak outside, can not cause crude oil pollution to ocean when recovering the oil at sea.
4, system is simple, and latent oily oil immersion line motor of system's main modular and oil-immersed pump are dressed up one, and system coordination is fine, is convenient to realize Based Intelligent Control.
The mover of existing linear electric motors generally all comprises axle, magnet ring, steel loop, and described magnet ring and steel loop are arranged on the axle, constitutes magnetic circuit.Mover is when design, and the position of magnet ring, steel loop all is that precise design is good, thereby guarantees magnetic circuit, the polar moment of whole mover.But mover linear reciprocating motion repeatedly after, magnet ring, steel loop will move, this will change magnetic circuit, the polar moment of whole mover, and influence the operate as normal of mover.At this moment, the maintenance personal will detect magnet ring and the steel loop that moves, and it is adjusted to the initial designs position, and this will spend a large amount of human and material resources costs.
Summary of the invention
Main purpose of the present invention is exactly to overcome the deficiency that above mover magnetic circuit breaks down easily, has proposed a kind of linear electric motors, makes it can keep long operate as normal.
For achieving the above object, the present invention is by the following technical solutions:
A kind of oil immersion line motor, comprise that stator reaches the mover of moving linearly in this stator, described mover comprises axle, permanent-magnetic clamp, magnetic guiding loop and second spacing ring, described permanent-magnetic clamp and magnetic guiding loop array arrangement are on axle, described second spacing ring tightens up and is installed on the axle, is used for permanent-magnetic clamp on the axle and magnetic guiding loop are carried out axial limiting.
Preferably, described second spacing ring comprises the 3rd hoop arc, the 4th hoop arc, the radian of described the 3rd hoop arc and the 4th hoop arc and be slightly less than the full circle radian, described the 3rd hoop arc and the 4th hoop arc fixed engagement with lock ring on described axle.
Preferably, described the 3rd hoop arc is provided with the fourth hole that is communicated with outside portion and end, the respective end of described the 4th hoop arc is provided with the 4th screw, pass described fourth hole and be locked at the 4th screw on described the 4th screw will be described the 3rd hoop arc and the 4th bind round the arc fixed engagement.
Preferably, also comprise bearing, described bearing holder (housing, cover) is on axle, and the external diameter of described bearing is bigger than the external diameter of permanent-magnetic clamp, magnetic guiding loop, second spacing ring.
Preferably, described bearing comprises plastic bearing and magnetic conduction bearing, and described plastic bearing is enclosed within the magnetic conductive axis bearing outer-ring.
Preferably, at least one external diameter is bigger than the external diameter of permanent-magnetic clamp in described magnetic guiding loop, second spacing ring.
Preferably, also comprise clamp nut, the end of described axle is provided with screw thread, and described clamp nut is locked on the described screw thread.
Preferably, described axle is a hollow type.
Preferably, described second spacing ring has a plurality of, and each second spacing ring is fixed on axle evenly distributedly.
Preferably, described stator comprise pipe in the stator, be set in the outer stator outer tube of pipe in the described stator and be arranged at described stator outer tube and stator between the pipe and along the plural number joint silicon steel ring and the coil of its axial array arrangement; Described oil immersion line motor also comprises at least one joint that is arranged at described stator outer tube and stator inner tube portion, described joint respectively with stator outer tube and stator in the joint of pipe be equipped with sealing ring, the pipe tight fit is to form annular seal space in described joint and described stator outer tube and the stator between the three.
Beneficial technical effects of the present invention is:
The linear electric motors of invention tighten up on the axle of mover second spacing ring are installed, permanent-magnetic clamp on the axle and magnetic guiding loop are carried out axial limiting, permanent-magnetic clamp and magnetic guiding loop are remained on the initial designs position, avoid permanent-magnetic clamp and magnetic guiding loop to move the variation that causes magnetic circuit and polar moment, thereby make mover operate as normal for a long time.And then avoid detection, maintenance to mover, reduce expenses.
Description of drawings
Fig. 1 is the structural representation of the oil immersion line motor of the specific embodiment of the invention;
Fig. 2 is the structural representation of stator of the oil immersion line motor of the specific embodiment of the invention;
Fig. 3 is the three-dimensional diagrammatic sketch of Fig. 2 center tap part;
Fig. 4 is that diagrammatic sketch is amplified in the part of Fig. 2 center tap and the assembling of stator inner and outer pipe;
Fig. 5 draws the part of an end of motor lines and amplifies diagrammatic sketch for stator among Fig. 2;
Fig. 6 is the three-dimensional diagrammatic sketch of first spacing ring among Fig. 2;
Fig. 7 is the three-dimensional diagrammatic sketch of the first hoop arc of first spacing ring;
Fig. 8 is the three-dimensional diagrammatic sketch of the second hoop arc of first spacing ring;
Fig. 9 is the structural representation of the mover of the specific embodiment of the invention;
Figure 10 is the structural representation of the bearing among Fig. 9.
Embodiment
Also in conjunction with the accompanying drawings the present invention is described in further details below by concrete execution mode.
As shown in Figure 1, 2, the present invention relates generally to a kind of oil immersion line motor that is used for work under the oil well, can will be positioned at underground crude oil pump to ground, these linear electric motors comprise stator 1 (being generally elementary) and make straight-line mover 2 (being generally secondary) up and down in this stators 1.
Described stator 1 comprises a plurality of silicon steel rings 15 and a plurality of coil 14 and two ring joints 10 of pipe 11, array arrangement in stator outer tube 9, the stator, and wherein, pipe 11 can adopt steel pipe in stator outer tube 9 and the stator, and described coil 14 is an annular.
The more piece silicon steel ring 15 of array arrangement and a plurality of coil 14 axially are set in stator outer tube 9 and the stator between pipe 11 bodys, and ring set manages on 11 in stator, and each silicon steel ring 15 and coil 14 are arranged with interlaced form vertically.The coil 14 of array arrangement is arranged in star or triangle connecting coil by three-phase.
Shown in Fig. 2-4, each joint 10 is arranged at an end of pipe 11 in stator outer tube 9, the stator, described joint 10 and stator outer tube 9, the interior pipe of stator 11 tight fits, all offer cannelure 103 on the outer peripheral face that pipe 11 inner peripheral surfaces that join and joint 10 and stator outer tube 9 join in joint 10 and stator, be equipped with sealing ring 12 in the groove 103, in the present embodiment, sealing circle 12 is an O type ring.Owing to be equipped with sealing ring 12 between the pipe 11 respectively and in stator outer tube 9 and the stator at joint 10, thereby pipe 11 tight fits are to form annular seal space in described joint 10 and described stator outer tube 9 and the stator between the three, to intercept entering of impurity such as oil outer, water, silicon steel ring 15 and loop coil 14 operational environments in the cavity have been guaranteed.
As shown in Figure 4, in further preferred embodiment, the for example annular gasket 17 of glue class also is housed between stator outer tube 9 and joint 10, this annular gasket 17 can pass and be clamped between stator outer tube 9 and the joint 10 by the 3rd screw (figure does not show), further guarantees the sealing effectiveness of annular seal space.
As shown in Figure 1, in the preferred embodiment, with the connecting part 22 of joint 10 with the outer peripheral face of stator outer tube 9, and joint 10 welds with the connecting part 23 of the outer peripheral face of the interior pipe 11 of stator, make it become seamless state, it can adopt splendid Laser Welding of weldability or argon arc welding, also can adopt other welding manner, has also guaranteed the environment of stator 1 in sealing.
Shown in Fig. 1-5, in the preferred embodiment, joint 10 comprises different two sections of external diameter, form step, the top 10a of this step, be that the little part of external diameter is inserted between the respective end of interior pipe 11 of stator and stator outer tube 9, the bottom 10b of this step is the respective end of the big part contact stator outer tube 9 of external diameter.Preferably be subjected to the end face of joint 10 contacts to offer first screw 901 at stator outer tube 9, the sidepiece of joint 10 offers deep gouge 101, the bottom 10b of the step of joint 10 is to offering first through hole 105 that is communicated with this deep gouge 101 by first screw 901, first screw (figure does not show) passes this first through hole 105 and locks on this first screw 901, makes stator outer tube 9 and 10 fluid-tight engagement of joint by the screw coupling mechanism force.
As shown in Figure 2, be reinforced insulation performance and intensity, high insulating cement class of coil 14 usefulness or plastics class are solidified, and form the shell of high strength and high insulating property.In stator outer tube 9 and stator, fill out between the pipe 11 and irritate as insulating material 29 such as high insulating cement or plastics, just simply illustrated the schematic diagram of insulating material 29 among Fig. 2, insulating material is to be filled in to manage between 11 in stator outer tube 9 and the stator in fact, not only be the part of Fig. 2 signal, it covers coil 14 and silicon steel ring 15 after being shaped.
Because oil immersion line motor of the present invention is filled with insulating material 29 manage 11 in stator outer tube 9 and stator between, thereby the high-insulativity and the sealing effectiveness of stator interior exciting part have been guaranteed, further intercepted entering of oil outer, water etc., the mover that has guaranteed to be positioned at stator interior is more made rectilinear motion up and down on unobstructive condition, guarantee the normal steady operation of oil immersion line motor.
As shown in Figure 2, can have wire hole 106 in a joint 10 by the outgoing cable line 20 control motor movements of this oil immersion line motor in order to make outside control system (figure does not show), motor spiral lead-out wire 18 is drawn from this wire hole 106.Described wire hole 106 can be offered vertically.Motor spiral lead-out wire 18 is arranged in the wire hole 106 with the link 21 of motor outgoing cable line 20, preferably in wire hole 106 with this link with screw or adhesive curing, thereby guarantee the sealing of wiring intensity and junction.As shown in Figure 2, connector portions 201 connection control system of motor outgoing cable line 20.Also can have out wire casing in a joint 10, motor spiral lead-out wire 18 goes out wire casing from this and draws.
As shown in Figure 2, the internal thread 102 that in ring joint 10, is provided with, locked screw 13 on it, can strengthen motor body intensity like this.
As shown in Figure 1, in the preferred embodiment, in the aforesaid airtight chamber except having silicon steel ring 15 and coil 14, also comprise fastening a plurality of first spacing rings 16 on the pipe 11 in the stator that are installed in, 16 pairs of silicon steel rings 15 of first spacing ring and coil 14 are managed 11 and are lined up positioning action on axially in stator, guaranteeing the arrangement requirement of stator excitation element, can guarantee every section slot pitch simultaneously, also is the spacing of the silicon steel ring 15 of stator 1.First spacing ring 16 can adopt steel loop, and in such cases, first spacing ring 16 also participates in the magnetic circuit of stator.Preferably, every predetermined distance first spacing ring 16 is set all, and near the position of two joints 10 first spacing ring 16 is being set respectively also, each first spacing ring, 16 sidepiece is right after silicon steel ring 15 or coil 14 to limit its activity.
Shown in Fig. 6-8, further, first spacing ring 16 is the crimp of being made up of the first hoop arc 16a and the second hoop arc 16b, and the radian sum of the first hoop arc 16a and the second hoop arc 16b is slightly less than the radian of full circle.The preferred first hoop arc 16a and the second hoop arc 16b all are semi-annular shape substantially.Wherein, the described first hoop arc 16a is provided with second through hole 162 that is communicated with its outside portion and end, the respective end of the second hoop arc 16b offers second screw, 163, the second screws and passes second through hole 162 and be locked on second screw 163, with the fixedly connected first hoop arc 16a and the second hoop arc 16b.Like this, promptly the first hoop arc 16a, the second hoop arc 16b lock ring are managed on 11 in stator by the screw coupling mechanism force.
In a further embodiment, first spacing ring 16 also can be other structures, as being made of the round projection that is positioned on the stator pipe 11.
For guaranteeing mechanical strength, pipe 11 adopts the thin wall-type steel pipe in the stator.In addition, pipe 11 both can be incorporate long tube in the stator, also can be to be joined by many short tube segmentations to constituting.
As shown in Figure 9, described mover 2 comprises axle 25, permanent-magnetic clamp 4, magnetic guiding loop 5, second spacing ring 7.Described permanent-magnetic clamp 4 and magnetic guiding loop 5 arrayed are on axle 25.Described second spacing ring 7 is fixed on the axle 25, is used for permanent-magnetic clamp on the axle 25 4 and magnetic guiding loop 5 are carried out axial limiting.Described second spacing ring 7 can make permanent-magnetic clamp 4 and magnetic guiding loop 5 remain on the initial designs position, and the polar moment of avoiding permanent-magnetic clamp 4 and magnetic guiding loop 5 to move causing changes, thereby guarantees the operate as normal of mover.And then avoid maintenance, detection to mover, reduce expenses.Described axle 25 can be steel pipe, and described magnetic guiding loop 5 can be steel loop, and the material of described second spacing ring 7 also can be steel.The number of described permanent-magnetic clamp 4 and magnetic guiding loop 5 generally all has a plurality of according to the width decision of length, permanent-magnetic clamp 4 and the magnetic guiding loop 5 of axle 25.
Shown in Fig. 9,10, in one embodiment, described mover 2 also comprises bearing 6, and described bearing 6 is enclosed within on the axle 25.The external diameter of described bearing 6 is bigger than the external diameter of permanent-magnetic clamp 4, magnetic guiding loop 5, second spacing ring 7, plays the effect of protection permanent-magnetic clamp 4, magnetic guiding loop 5, second spacing ring 7.As shown in Figure 2, described bearing 6 comprises plastic bearing 61 and magnetic conduction bearing 62, and described plastic bearing 61 is enclosed within magnetic conduction bearing 62 outer rings.Described plastic bearing 61 is made by the high molecular abrasion-proof material, to reduce coefficient of friction.Described magnetic conduction bearing 62 can be the steel bearing.
(structure of second spacing ring 7 is identical with the structure of first spacing ring 16 for described second spacing ring 7, can be with reference to figure 6-8) comprise the crimp of forming by the 3rd hoop arc 71, the 4th hoop arc 72, the radian of described the 3rd hoop arc 71 and the 4th hoop arc 72 and be slightly less than the full circle radian, described the 3rd hoop arc 71 and the 4th hoop arc 72 fixed engagement with lock ring on described axle 25.In one embodiment, described the 3rd hoop arc 71, the 4th hoop arc 72 all are semi-annular shape substantially.Described the 3rd hoop arc 71 is provided with the fourth hole 73 that is communicated with outside portion and end, the respective end of described the 4th hoop arc 72 is provided with the 4th screw 74, the four screws (figure do not show) and passes described fourth hole 73 and be locked on described the 4th screw 74 so that described the 3rd hoop arc 71 and the 4th is bound round arc 72 fixed engagement.
Certainly, as required, the user can design three or more hoop arcs and form a complete spacing ring.As long as these bind round the radian of arcs and are slightly less than the full circle radian.
In a further embodiment, described second spacing ring 7 also can be other structure, as being made of the round projection that is positioned on the moving axis.
As shown in Figure 9, in one embodiment, at least one external diameter is more bigger than the external diameter of permanent-magnetic clamp 4 in described magnetic guiding loop 5, second spacing ring 7.Like this, after bearing 6 wearing and tearing, at least one just can be permanent-magnetic clamp 4 in the magnetic guiding loop 5 and second spacing ring 7 provides protection
As shown in Figure 9, in certain embodiments, described mover 2 also comprises clamp nut 8, and described moving axis end is provided with screw thread 3, and described clamp nut is locked on the described screw thread 3.Clamp nut can guarantee the coupling mechanism force of permanent-magnetic clamp 4, magnetic guiding loop 5, second spacing ring 7 and bearing 6 on the axle 25.
As shown in Figure 9, if the number of permanent-magnetic clamp 4 and magnetic guiding loop 5 is a lot, so described second spacing ring 7 can be provided with a plurality of, and each second spacing ring 7 evenly is fixed on the axle 25 discretely.Promptly on described axle 25, one second spacing ring 7 just is set, and first spacing ring, the 16 further axial limitings that strengthen permanent-magnetic clamp 4 and magnetic guiding loop 5 also are being set near clamp nut 8 places every predetermined distance.
As shown in Figure 9, described moving axis is a hollow type, thereby plays an effect or a direct part as oil circuit that strengthens intensity, dives oily breathing.
Described screw thread 3 also can be used for linking the assembly for plunger of oil well pump.Internal thread 102 on the described joint 10 also can be used for linking the pump barrel assembly of oil well pump.
As shown in Figure 1, the operation principle of above-mentioned oil immersion line motor is as follows:
Because oil immersion line motor of the present invention is worked under oil well, and is connected with oil well pump.The present invention is provided with joint by pipe, position outer tube end in the location of its stator, this joint all merges and the common airtight chamber that forms of stator inner and outer pipe by pipe, stator outer tube close-fitting in sealing ring and the stator, has guaranteed being arranged at the silicon steel ring between pipe, the stator outer tube and the sealing property of coil in the stator.After the logical three-phase electricity of coil 14 coils 14 of stator 1, coil 14, the silicon steel annulus 15 that is mated layout will produce the stator travelling-magnetic-field, and interacting with mover 2 converts electromagnetic energy to mechanical energy, and generation thrust moves up and down mover 2 in stator 1.Move up and down thereby drive oil well pump, underground crude oil can be extracted in the oil pick-up tube continually by oil well pump, and be transported in the ground installation from oil pick-up tube.Oil immersion line motor of the present invention can make stator keep sealing fully, intercepted entering of oil outer, water etc., thereby guaranteed that the mover that is positioned at stator interior moves up and down under unobstructive condition,, improved system works efficient greatly owing to need not the sucker rod of traditional length.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. oil immersion line motor, comprise that stator (1) reaches the mover (2) of moving linearly in this stator, it is characterized in that: described mover (2) comprises axle (25), permanent-magnetic clamp (4), magnetic guiding loop (5) and second spacing ring (7), described permanent-magnetic clamp (4) and magnetic guiding loop (5) array arrangement are on axle (25), described second spacing ring (7) tightens up and is installed on the axle (25), is used for permanent-magnetic clamp (4) on the axle (25) and magnetic guiding loop (5) are carried out axial limiting; Described second spacing ring (7) comprises the 3rd hoop arc (71), the 4th hoop arc (72), the radian of described the 3rd hoop arc (71) and the 4th hoop arc (72) and be slightly less than the full circle radian, described the 3rd hoop arc (71) and the 4th bind round arc (72) fixed engagement with lock ring on described (25).
2. oil immersion line motor according to claim 1, it is characterized in that: described the 3rd hoop arc (71) is provided with the fourth hole (73) that is communicated with outside portion and end, the respective end of described the 4th hoop arc (72) is provided with the 4th screw (74), pass described fourth hole (73) and be locked at the 4th screw on described the 4th screw (74) will be described the 3rd hoop arc (71) and the 4th bind round arc (72) fixed engagement.
3. oil immersion line motor according to claim 1 is characterized in that: also comprise bearing (6), described bearing (6) is enclosed within on the axle (25), and the external diameter of described bearing (6) is bigger than the external diameter of permanent-magnetic clamp (4), magnetic guiding loop (5), second spacing ring (7).
4. oil immersion line motor according to claim 3 is characterized in that: described bearing (6) comprises plastic bearing (61) and magnetic conduction bearing (62), and described plastic bearing (61) is enclosed within magnetic conduction bearing (62) outer ring.
5. oil immersion line motor according to claim 1 is characterized in that: at least one external diameter is bigger than the external diameter of permanent-magnetic clamp (4) in described magnetic guiding loop (5), second spacing ring (7).
6. oil immersion line motor according to claim 1 is characterized in that: also comprise clamp nut (8), the end of described axle (25) is provided with screw thread (3), and described clamp nut (8) is locked on the described screw thread (3).
7. oil immersion line motor according to claim 1 is characterized in that: described axle (25) is a hollow type.
8. oil immersion line motor according to claim 1 is characterized in that: described second spacing ring (7) has a plurality of, and each second spacing ring (7) is fixed on axle (25) evenly distributedly.
9. according to the arbitrary described oil immersion line motor of claim 1-8, it is characterized in that: described stator comprises pipe (11) in the stator, be set in the outer stator outer tube (9) of pipe (11) in the described stator and be arranged at described stator outer tube (9) and stator in save silicon steel ring (15) and coil (14) between the pipe (11) and along the plural number of its axial array arrangement; Described oil immersion line motor also comprises at least one joint (10) that is arranged at pipe (11) end in described stator outer tube (9) and the stator, described joint (10) respectively with stator outer tube (9) and stator in the joint of pipe (11) be equipped with sealing ring (12), interior (11) tight fit of managing of described joint (10) and described stator outer tube (9) and stator is to form annular seal space between the three.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102171790A CN101409494B (en) | 2008-10-30 | 2008-10-30 | Oil-submersible linear motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102171790A CN101409494B (en) | 2008-10-30 | 2008-10-30 | Oil-submersible linear motor |
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| CN101409494A CN101409494A (en) | 2009-04-15 |
| CN101409494B true CN101409494B (en) | 2011-12-07 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101969260B (en) * | 2010-08-31 | 2012-10-03 | 深圳市大族激光科技股份有限公司 | Cylindrical submersible linear motor and submersible linear pumping unit |
| WO2015096085A1 (en) * | 2013-12-26 | 2015-07-02 | 深圳市大族激光科技股份有限公司 | Oil-submersible linear motor oil extraction system |
| CN107276365B (en) * | 2017-08-07 | 2023-09-01 | 吕新青 | Novel linear motor rotor |
| CN107276364B (en) * | 2017-08-09 | 2023-08-01 | 吕新青 | Submersible linear motor |
| CN110380591A (en) * | 2018-04-12 | 2019-10-25 | 上海鸣志电器股份有限公司 | A kind of step-by-step linear electric motor with hollow shaft |
| CN109951046A (en) * | 2019-04-04 | 2019-06-28 | 河北国创石油设备有限公司 | A kind of stator structure of oil-submersible linear lifting power device |
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