CN104539067A - High-power-mass-rate direct-drive permanent-magnet synchronous motor of submersible progressing cavity pump - Google Patents
High-power-mass-rate direct-drive permanent-magnet synchronous motor of submersible progressing cavity pump Download PDFInfo
- Publication number
- CN104539067A CN104539067A CN201410735459.6A CN201410735459A CN104539067A CN 104539067 A CN104539067 A CN 104539067A CN 201410735459 A CN201410735459 A CN 201410735459A CN 104539067 A CN104539067 A CN 104539067A
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- Prior art keywords
- motor
- stator core
- rotor
- alignment bearing
- power
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
Abstract
The invention relates to a high-power-mass-rate direct-drive permanent-magnet synchronous motor of a submersible progressing cavity pump. The high-power-mass-rate direct-drive permanent-magnet synchronous motor comprises a motor shell, a rotor with a motor shaft and a stator core are arranged in the motor shell, a stator winding is arranged in the stator core, and permanent magnets are distributed on the rotor. The motor is characterized in that alignment bearings are further included, and comprise inner rings and outer rings; the rotor is divided into a plurality of segments in the axial direction of the motor shaft, each segment is connected to the motor shaft, and the inner rings of the alignment bearings are arranged between the adjacent segments of the rotor; the stator core is of a straight-groove overall structure, magnetic isolating segments made of non-magnetic materials are arranged at the positions, corresponding to the outer rings of the alignment bearings, of the stator core, and the outer circles of the alignment bearings are embedded into the inner circles of the magnetic isolating segments. The stator core is of the straight-groove overall structure, and due to the high power mass rate, the power mass rate is two to three times higher than that of an existing motor of the same kind under the condition of identical power and identical rotating speed.
Description
Technical field
The present invention relates to permanent magnet synchronous motor, specifically refer to that a kind of high merit matter is than submersible screw pump direct-drive permanent-magnet synchronous motor.
Background technology
The most frequently used oil production equipment in oil field is lifting oil pumper, " machine of kowtowing " that namely it has often been said.Although its application is wide, service time is long, one-time investment is many, it is high to consume energy, maintenance workload greatly, and this oil production equipment is only applicable to the good shallow well of hole condition.Along with the continuous consumption of petroleum resources, the development difficulty of oil well constantly increases, such as deep-well and inclined shaft, the heavy oil wells of high sand content, high oil-gas ratio, the high water-cut stage even oil well etc. of ultra-high water cut stage.If use screw pump oil production system, can use by the deep-well about km, it is connected with the subsurface progressive cavity below km and transmitting torque with sucker rod, makes screw pump action pulls downhole oil air water fluid.But due to the special construction of screw pump many nodes transmission, and maintenance period frequently, it is manufactured and the high expensive of maintenance.Above-mentioned two kinds of equipment are all that drive motors is placed in ground, and their application is very restricted.
For above-mentioned various complex hole condition, pump is placed in down-hole by someone together with drive motors, usually multistage submersible electric pump and submersible screw pump two class is had, wherein, submersible electric pump is applicable to the larger oil well of oil pump capacity, submersible screw pump is then more suitable for low discharge hole condition, such as the hole condition of above-mentioned inclined shaft and various complexity.
Screw pump eliminates sucker rod, solve the problems such as power hungry, bar, pipe eccentric wear and rod parting, but its feature to be rotating speed low, starting torque is large, in order to ensure that screw pump can normally work, the motor of down-hole must drive screw pump rotor to rotate by decelerator, and because its driving-chain is longer, decelerator volume is limited, its scope of application is still subject to severely restricts, simultaneously when the moment of torsion born is larger, decelerator is easy to break down, and affects complete machine useful life.
Increase gradually containing sand drain, high-gas-contained well, heavy oil wells along with inclined shaft, height, and the change of ground environment, need development one better can adapt to the novel oil production equipment meeting the exploitation of deep-well extract of special oil reservoir (Gao Hansha, high gassiness, heavy oil wells, inclined shaft) for this reason, so oily directly-driven screw pump oil extraction system technology of diving is arisen at the historic moment.
Dive oily directly-driven screw pump oil extraction system on the basis of submersible screw pump, remove deceleration device, adopt the work of dedicated permanent-magnet synchronous motor Direct driver screw pump, this system fundamentally eliminates ground driving screw pump, the rod parting problem of rod-pumped well in oil extraction, also aforementioned submersible screw pump is solved because of complex structure at deep-well, inclined shaft, the problem be restricted is used in complex hole condition, it does not have valve body and complicated runner, hydraulic loss is few, medium sucks continuously and discharges, not easily sand card, also not easily gas lock is produced, therefore the category of pump transmission liquid is wider, comprise high viscosity, high-content wax, containing sand, live crude, energy consumption is low, there is promotional value.
Publication number is that the Chinese patent of CN101969256 discloses a kind of oil-immersed pump direct-drive permanent magnet synchronous motor, and multiple permagnetic synchronous motor unit is together in series by this motor in mechanical structure and circuit, becomes the motor combination of elongated shape according to oil well bore different designs.The more original submersible screw pump technology of this technology has had significant improvement, but due to the restriction of this technical products design feature, its length is still longer, merit matter ratio (power-mass ratio) is still not high, according to this patent documentation introduction, motor length, within the scope of 2 ~ 12m, is still subject to a definite limitation in use, maintenance etc.
Summary of the invention
The object of the invention is overcome above-mentioned the deficiencies in the prior art and provide a kind of high merit matter than submersible screw pump direct-drive permanent-magnet synchronous motor, and the stator core in this permagnetic synchronous motor is straight trough overall structure, thus realizes high merit matter ratio.
The technical scheme realizing the object of the invention employing is that a kind of high merit matter is than submersible screw pump direct-drive permanent-magnet synchronous motor, comprise motor housing, rotor and the stator core of charged arbor is provided with in described motor housing, stator winding is provided with in stator core, rotor is distributed with permanent magnet, this permanent magnet synchronous motor also comprises alignment bearing, and described alignment bearing comprises inner ring and outer ring; Described rotor is axially divided into multistage along motor shaft, and every section is connected on motor shaft 8, and the inner ring of described alignment bearing is located between adjacent two-stage rotor; Described stator core is straight trough overall structure, and in stator core with the magnetic isolating segment being provided with non-magnet material in corresponding position, alignment bearing outer ring and making, the cylindrical of described alignment bearing is embedded in the inner circle of described magnetic isolating segment.
In technique scheme, the Internal and external cycle of described alignment bearing does not contact each other after heat expansion in 200 DEG C.
Tool of the present invention has the following advantages:
1, Gao Gongzhi ratio, as compared to multiple electric motor units being adopted in the submersible electric machine with oil technical scheme of existing elongated shape the structure that mechanical structure and circuit are connected, stator core of the present invention adopts straight trough overall structure, thus improve the merit matter ratio of motor, the length of motor of the present invention can control within the scope of 1 ~ 4m, at same power with under speed conditions, the more existing similar motor of merit matter exceeds 2 ~ 3 times.
2, because motor length is short, use flexibly, be specially adapted to inclined shaft and more complicated horizontal well hole condition.
3, because structure is relatively simple, consumptive material is few, and cost is low, uses middle equipment failure rate low, easy to maintenance.
Accompanying drawing explanation
Fig. 1 is the structural representation of high merit matter of the present invention than low speed submersible screw pump direct-drive permanent-magnet synchronous motor.
Fig. 2 is the enlarged diagram of alignment bearing.
In figure, 1-motor head, 2-shell, 3-motor winding, 4-magnetic isolating segment, 5-stator core, 6-rotor, 7-alignment bearing, 8-motor shaft, 9-motor base.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As depicted in figs. 1 and 2, high merit matter of the present invention comprises motor housing 2 and motor base 9 than submersible screw pump direct-drive permanent-magnet synchronous motor, establish the rotor 6 with motor shaft 8 and stator core 5 in motor housing 2, be embedded with stator winding 3 in described stator core 5, rotor 6 is distributed with permanent magnet.
Permanent magnet motor stator of the present invention unshakable in one's determination 5 adopts straight trough overall structure, adopting with the slender piece used in order to applicable oil well in prior art connects multiple permagnetic synchronous motor unit in mechanical structure with circuit compares, straight trough overall structure of the present invention has Gao Gongzhi ratio, thus the length of this motor can be controlled within the scope of 1 ~ 4m, at same power with under speed conditions, the more existing similar motor of merit matter exceeds 2 ~ 3 times.
In addition, the present invention also comprises multiple for preventing motor shaft distortion in the present invention, and ensures the alignment bearing of motor shaft concentricity, and as shown in Figure 2, alignment bearing 7 comprises inner ring and outer ring.The conveniently installation of alignment bearing 7, the rotor in the present invention is axially divided into multistage along motor shaft 8, and every section is connected on motor shaft 8, and the inner ring of alignment bearing 7 is located between adjacent two-stage rotor, and this inner ring is fixed on motor shaft 8.Stator core 5 is provided with the magnetic isolating segment 4 that non-magnet material is formed with corresponding position, alignment bearing 7 outer ring, the cylindrical of alignment bearing 7 is embedded in the inner circle of magnetic isolating segment 4.The present invention owing to adopting magnetic isolating segment 4, thus avoids alignment bearing 7 to be subject to the impact of rotor field, makes alignment bearing 7 overcome the unilateral magnetic force of permanent-magnet motor rotor, keeps rotating flexibly in the hot environment of down-hole.
The Internal and external cycle of the present invention's alignment bearing used 7 all adopts the wear-resistant material that the coefficient of expansion is less and identical, and there is between Internal and external cycle minimum fit clearance, namely make the Internal and external cycle of alignment bearing 7 not contact each other after heat expansion in 200 DEG C, avoid producing between the inner ring of alignment bearing 7 and outer ring rubbing.
Claims (2)
1. one kind high merit matter is than submersible screw pump direct-drive permanent-magnet synchronous motor, comprise motor housing, rotor and the stator core of charged arbor is provided with in described motor housing, stator winding is provided with in stator core, rotor is distributed with permanent magnet, it is characterized in that: also comprise alignment bearing, described alignment bearing comprises inner ring and outer ring; Described rotor is axially divided into multistage along motor shaft, and every section is connected on motor shaft, and the inner ring of described alignment bearing is located between adjacent two-stage rotor; Described stator core is straight trough overall structure, and in stator core with the magnetic isolating segment being provided with non-magnet material in corresponding position, alignment bearing outer ring and making, the cylindrical of described alignment bearing is embedded in the inner circle of described magnetic isolating segment.
2. high merit matter according to claim 1 is than submersible screw pump direct-drive permanent-magnet synchronous motor, it is characterized in that: the Internal and external cycle of described alignment bearing does not contact each other after heat expansion in 200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735459.6A CN104539067A (en) | 2014-12-05 | 2014-12-05 | High-power-mass-rate direct-drive permanent-magnet synchronous motor of submersible progressing cavity pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735459.6A CN104539067A (en) | 2014-12-05 | 2014-12-05 | High-power-mass-rate direct-drive permanent-magnet synchronous motor of submersible progressing cavity pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104539067A true CN104539067A (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410735459.6A Pending CN104539067A (en) | 2014-12-05 | 2014-12-05 | High-power-mass-rate direct-drive permanent-magnet synchronous motor of submersible progressing cavity pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN104539067A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507808A (en) * | 2016-01-11 | 2016-04-20 | 东方电气集团东方电机有限公司 | Underground drilling tool motor |
| CN111293816A (en) * | 2020-04-07 | 2020-06-16 | 东方电气集团东方电机有限公司 | Centering bearing for motor of downhole drilling tool |
| CN113162355A (en) * | 2021-04-22 | 2021-07-23 | 苏州大学 | Permanent magnet synchronous submersible motor based on screw pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6091175A (en) * | 1998-03-12 | 2000-07-18 | Camco International, Inc. | Self-centering rotor bearing assembly for submersible pump motors |
| WO2004027211A1 (en) * | 2002-09-18 | 2004-04-01 | Philip Head | Electric motors for powering downhole tools |
| CN2872720Y (en) * | 2005-08-25 | 2007-02-21 | 天津市油田采油成套设备有限公司 | Large-power oil-submersible electric motor |
| CN2894038Y (en) * | 2006-02-18 | 2007-04-25 | 中国石化海上石油工程技术检验中心 | Non-metal phase oil-submersible pump electric machine to friction |
| CN102570756A (en) * | 2010-12-22 | 2012-07-11 | 万奥普（北京）石油工程技术开发研究院有限公司 | Self-start permanent-magnet synchronous submersible motor |
| CN203289295U (en) * | 2013-05-31 | 2013-11-13 | 中国石油大学(华东) | Low-speed large-torque submersible permanent-magnetic synchronous motor |
| CN203722449U (en) * | 2014-03-18 | 2014-07-16 | 山东德森机电科技股份有限公司 | Submersible switched reluctance motor |
| CN204271765U (en) * | 2014-12-05 | 2015-04-15 | 湖北西浦电机科技有限责任公司 | A kind of high merit matter is than submersible screw pump direct-drive permanent-magnet synchronous motor |
-
2014
- 2014-12-05 CN CN201410735459.6A patent/CN104539067A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6091175A (en) * | 1998-03-12 | 2000-07-18 | Camco International, Inc. | Self-centering rotor bearing assembly for submersible pump motors |
| WO2004027211A1 (en) * | 2002-09-18 | 2004-04-01 | Philip Head | Electric motors for powering downhole tools |
| CN2872720Y (en) * | 2005-08-25 | 2007-02-21 | 天津市油田采油成套设备有限公司 | Large-power oil-submersible electric motor |
| CN2894038Y (en) * | 2006-02-18 | 2007-04-25 | 中国石化海上石油工程技术检验中心 | Non-metal phase oil-submersible pump electric machine to friction |
| CN102570756A (en) * | 2010-12-22 | 2012-07-11 | 万奥普（北京）石油工程技术开发研究院有限公司 | Self-start permanent-magnet synchronous submersible motor |
| CN203289295U (en) * | 2013-05-31 | 2013-11-13 | 中国石油大学(华东) | Low-speed large-torque submersible permanent-magnetic synchronous motor |
| CN203722449U (en) * | 2014-03-18 | 2014-07-16 | 山东德森机电科技股份有限公司 | Submersible switched reluctance motor |
| CN204271765U (en) * | 2014-12-05 | 2015-04-15 | 湖北西浦电机科技有限责任公司 | A kind of high merit matter is than submersible screw pump direct-drive permanent-magnet synchronous motor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507808A (en) * | 2016-01-11 | 2016-04-20 | 东方电气集团东方电机有限公司 | Underground drilling tool motor |
| CN105507808B (en) * | 2016-01-11 | 2018-10-09 | 东方电气集团东方电机有限公司 | A kind of down-hole equipment motor |
| CN111293816A (en) * | 2020-04-07 | 2020-06-16 | 东方电气集团东方电机有限公司 | Centering bearing for motor of downhole drilling tool |
| CN113162355A (en) * | 2021-04-22 | 2021-07-23 | 苏州大学 | Permanent magnet synchronous submersible motor based on screw pump |
| CN113162355B (en) * | 2021-04-22 | 2023-06-23 | 苏州大学 | Screw pump-based permanent magnet synchronous submersible motor |
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Application publication date: 20150422 |
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| RJ01 | Rejection of invention patent application after publication |