CN104299749B - A kind of V-arrangement permanent magnet device producing static gradient magnetic field - Google Patents
A kind of V-arrangement permanent magnet device producing static gradient magnetic field Download PDFInfo
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- CN104299749B CN104299749B CN201410579797.5A CN201410579797A CN104299749B CN 104299749 B CN104299749 B CN 104299749B CN 201410579797 A CN201410579797 A CN 201410579797A CN 104299749 B CN104299749 B CN 104299749B
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- permanent magnet
- cylindrical permanent
- shimming
- pad
- magnet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention discloses a kind of V-arrangement permanent magnet device producing static gradient magnetic field, including V shape iron yoke, the first cylindrical permanent magnet, the second cylindrical permanent magnet, the first shimming pad and the second shimming pad；First cylindrical permanent magnet all becomes axial symmery shape to arrange with the second cylindrical permanent magnet, the first shimming pad and the second shimming pad；First cylindrical permanent magnet is all axial along cylinder with the direction of magnetization of the second cylindrical permanent magnet, remanent magnetism size is identical, and both are contrary with the magnetic pole of one end that V shape iron yoke connects.V-arrangement permanent magnet device of the present invention, in v-shaped structure cavity between two shimming pads of the static gradient field areas produced by it, composite insulator material aging on convenient detection plug, and overall structure is simple, volume is little, is convenient for carrying.And this V-arrangement permanent magnet device can change the uniformity of static gradient field areas internal magnetic field by the angle of gradient angle of the V-arrangement angle of change V shape iron yoke and shimming pad, improve NMR signal quality.
Description
Technical field
The invention belongs to permanent magnet mechanism field, the static magnet structure being specifically related in nuclear magnetic resonance apparatus.
Background technology
As nondestructive measurement means, nuclear magnetic resonance technique have been widely used food quality analysis, geophysics, biomedicine,
The fields such as material science.
Such as may utilize nuclear magnetic resonance technique in terms of microcosmic, analyze the chemical aging of composite insulator.Composite insulator relies on its matter
The premium properties such as amount is light, good mechanical property are widely used in power system transmission line, but composite insulator is aging to electric power
There is potential threat in the safe operation of system.In prior art, as patent CN201210248887.7 proposes a kind of Non-Destructive Testing again
Closing the sensor of the Ageing of Insulators, this sensor magnet structure is C-shaped configuration, facilitates sensor to be directly sandwiched on full skirt measurement old
Change degree, but the T2 of the composite insulator being attached on plug is measured in inconvenience.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of V-arrangement permanent magnet device producing static gradient magnetic field, to solve existing inspection
Measurement equipment is to the problem of composite insulator ageing management inconvenience on plug.
The present invention produces the V-arrangement magnet structure in static gradient magnetic field, including by the first magnet holder and the second V-shaped company of magnet holder
The V shape iron yoke connecing composition, the first cylindrical permanent magnet being fixed in the first magnet holder, be fixed in the second magnet holder
Two cylindrical permanent magnet, it is fixed on the first shimming pad of the first cylindrical permanent magnet upper end and is fixed on the second cylindrical magnet
The second shimming pad on body；
Described first cylindrical permanent magnet and the second cylindrical permanent magnet are fixed on the V-groove of V shape iron yoke with axial symmery shape
In, the first shimming pad and the second shimming pad also become axial symmery shape to arrange；
The direction of magnetization of the first cylindrical permanent magnet and the second cylindrical permanent magnet is all axial along cylinder, the first cylindrical permanent magnet
Identical with the remanent magnetism size of the second cylindrical permanent magnet, and the first cylindrical permanent magnet and the second cylindrical permanent magnet and V shape iron
The magnetic pole of one end that yoke connects is contrary.
Further, described first shimming pad and the second shimming pad are wedge shape.
Further, described first magnet holder and the second magnet holder being respectively arranged with circular locating slot, described first cylinder is forever
Magnet and the second cylindrical permanent magnet are arranged in the circular locating slot of correspondence, described first shimming pad and the first magnet holder it
Between and the second shimming pad and the second magnet holder between be all bolted to connection, the first cylindrical permanent magnet and second
Cylindrical permanent magnet is pressed abd fixed in the magnet holder of correspondence by corresponding shimming pad.
Beneficial effects of the present invention:
A kind of V-arrangement permanent magnet device producing static gradient magnetic field of the present invention, produced by it, static gradient field areas is positioned at two shimmings
In v-shaped structure cavity between pad, composite insulator material aging on convenient detection plug, and overall structure is simple, volume is little,
It is convenient for carrying.And this V-arrangement permanent magnet device can be by changing V-arrangement angle and the angle of gradient angle of shimming pad of V shape iron yoke
Degree changes the uniformity of static gradient field areas internal magnetic field, improves NMR signal quality.
Accompanying drawing explanation
Fig. 1 is the perspective view that the present invention produces the V-arrangement permanent magnet device in static gradient magnetic field；
Fig. 2 is the schematic diagram of composite insulator on V-arrangement permanent magnet device measure-axis；
Fig. 3 is static magnetic field homogeneous area horizontal cross-section Distribution of Magnetic Field figure produced by V-arrangement permanent magnet device in embodiment；
Fig. 4 is static magnetic field homogeneous area longitudinal cross-section Distribution of Magnetic Field figure produced by V-arrangement permanent magnet device in embodiment.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, the present embodiment produces the V-arrangement permanent magnet device in static gradient magnetic field, including by the first magnet holder 1 and the
Two magnet holder 2 V-shaped connect composition V shape iron yoke, the first cylindrical permanent magnet 3 being fixed in the first magnet holder 1,
The second cylindrical permanent magnet 4 of being fixed in the second magnet holder 2, it is fixed on the first even of the first cylindrical permanent magnet 3 upper end
Field pad 5 and the second shimming pad 6 being fixed in the second cylindrical permanent magnet 4；
Described first cylindrical permanent magnet 3 and the second cylindrical permanent magnet 4 are fixed on the V-type of V shape iron yoke with axial symmery shape
In groove, the first shimming pad 5 also becomes axial symmery shape to arrange with the second shimming pad 6；
The direction of magnetization of the first cylindrical permanent magnet 3 and the second cylindrical permanent magnet 4 is all axial along cylinder, and the first cylinder is forever
Magnet 3 is identical with the remanent magnetism size of the second cylindrical permanent magnet 4, and the first cylindrical permanent magnet 3 and the second cylindrical magnet
Body 4 is contrary with the magnetic pole of one end that V shape iron yoke connects, such as shown in Fig. 1, and the S pole of the first cylindrical permanent magnet 3 and V
Shape iron yoke connects, and the N pole of the second cylindrical permanent magnet 4 is connected with V shape iron yoke.
In the present embodiment, described first magnet holder 1 and the second magnet holder 2 it is respectively arranged with circular locating slot, described first
Cylindrical permanent magnet 3 and the second cylindrical permanent magnet 4 are arranged in the circular locating slot of correspondence, described first shimming pad 5
With first all connect by bolt 7 is fixing between magnet holder 1 and between the second shimming pad 6 and the second magnet holder 2,
First cylindrical permanent magnet 3 and the second cylindrical permanent magnet 4 are pressed abd fixed on the magnet holder of correspondence by corresponding shimming pad
On, fit closely between permanent magnet and shimming pad and V shape iron yoke, fixation, and easy accessibility.
Static gradient field areas v-shaped structure cavity between two shimming pads produced by the present embodiment V-arrangement permanent magnet device
In, as shown in Figure 2 composite insulator 8 is placed in the V-arrangement space between shimming pad during detection, plug can be detected easily
Upper composite insulator material aging situation, and the overall structure of this V-arrangement permanent magnet device is simple, volume is little, is convenient for carrying.
And in the present embodiment, described first shimming pad 5 and the second shimming pad 6 are wedge shape, are had not by replacing
With the shimming pad of gradient angle beta, or change the V-arrangement angle theta of V shape iron yoke, magnetic in static gradient field areas can be changed
The uniformity of field, improves NMR signal quality.
Concrete, in the present embodiment, the size of two cylindrical permanent magnet blocks isRemanent magnetism size is 1T.Two is even
Field pad is processed into by the silicon steel sheet of 5 thickness 2mm long 70mm width 55mm, and the gradient angle beta of shimming pad is 7.9 °.
First magnet holder 1 and the second magnet holder 2 are processed into by 6 thick 2mm long 96.7mm width 50mm silicon steel sheets, and V-arrangement presss from both sides
Angle θ is 106 °.
As it is shown on figure 3, this magnetic field is uniformly distributed in the horizontal plane, in the aspect of Z=12.5mm, 10mm × 10mm region
The interior generation uniformity is 6 ‰.As shown in Figure 4, on longitudinal section, decay with constant gradient 8.3T/m from 218.3mT in magnetic field
To 176.6mT.
Finally illustrating, above example is only in order to illustrate technical scheme and unrestricted, although with reference to preferred embodiment
The present invention is described in detail, it will be understood by those within the art that, technical scheme can have been repaiied
Changing or equivalent, without deviating from objective and the scope of technical solution of the present invention, it all should contain the claim model in the present invention
In the middle of enclosing.
Claims (3)
1. the V-arrangement permanent magnet device producing static gradient magnetic field, it is characterised in that: include by the first magnetic
Housing is V-shaped with the second magnet holder be connected composition V shape iron yoke, be fixed in the first magnet holder first
Cylindrical permanent magnet, the second cylindrical permanent magnet being fixed in the second magnet holder, it is fixed on the first cylinder
First shimming pad of shape permanent magnet upper end and the second shimming pad being fixed in the second cylindrical permanent magnet
Sheet；
Described first cylindrical permanent magnet and the second cylindrical permanent magnet are fixed on V shape iron with axial symmery shape
In the V-groove of yoke, the first shimming pad and the second shimming pad also become axial symmery shape to arrange；
The direction of magnetization of the first cylindrical permanent magnet and the second cylindrical permanent magnet is all axial along cylinder, and first
Cylindrical permanent magnet is identical with the remanent magnetism size of the second cylindrical permanent magnet, and the first cylindrical permanent magnet and
Second cylindrical permanent magnet is contrary with the magnetic pole of one end that V shape iron yoke connects.
A kind of V-arrangement permanent magnet device producing static gradient magnetic field the most according to claim 1, it is special
Levy and be: described first shimming pad and the second shimming pad are wedge shape.
A kind of V-arrangement permanent magnet device producing static gradient magnetic field the most according to claim 1 and 2,
It is characterized in that: in described first magnet holder and the second magnet holder, be respectively arranged with circular locating slot, described
First cylindrical permanent magnet and the second cylindrical permanent magnet are arranged in the circular locating slot of correspondence, and described the
All pass through between one shimming pad and the first magnet holder and between the second shimming pad and the second magnet holder
Bolt is fixing to be connected, and the first cylindrical permanent magnet and the second cylindrical permanent magnet are by corresponding shimming pad pressure
Fasten in corresponding magnet holder.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579797.5A CN104299749B (en) | 2014-10-24 | 2014-10-24 | A kind of V-arrangement permanent magnet device producing static gradient magnetic field |
| PCT/CN2014/093048 WO2016061875A1 (en) | 2014-10-24 | 2014-12-04 | V-shaped permanent magnet device capable of generating static gradient magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410579797.5A CN104299749B (en) | 2014-10-24 | 2014-10-24 | A kind of V-arrangement permanent magnet device producing static gradient magnetic field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104299749A CN104299749A (en) | 2015-01-21 |
| CN104299749B true CN104299749B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410579797.5A Active CN104299749B (en) | 2014-10-24 | 2014-10-24 | A kind of V-arrangement permanent magnet device producing static gradient magnetic field |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104299749B (en) |
| WO (1) | WO2016061875A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3951417B1 (en) * | 2020-08-07 | 2024-05-01 | Bruker Biospin GmbH & Co. KG | Nmr-sensor with a v-shaped sample space for analysis of liquids |
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| US6873077B2 (en) * | 2001-09-26 | 2005-03-29 | Vacuumschmelze Gmbh & Co. Kg | Shell-shaped magnet |
| CN1835340A (en) * | 2006-03-30 | 2006-09-20 | 上海大学 | 'V' type builti-in rotor of permanent megnet dynamo |
| CN102136341A (en) * | 2010-12-30 | 2011-07-27 | 包头稀土研究院 | Anisotropic V-shaped orienting magnet ring |
| CN102426897A (en) * | 2011-12-20 | 2012-04-25 | 重庆大学 | Semi-elliptical-distributed open nuclear magnetic resonance permanent structure |
| CN202260721U (en) * | 2011-10-31 | 2012-05-30 | 上海中科深江电动车辆有限公司 | Internal rotor structure of permanent magnet motor |
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| JPS5556455A (en) * | 1979-07-03 | 1980-04-25 | Tokuzo Inariba | Miniature synchronous motor |
| JPH11260632A (en) * | 1998-03-13 | 1999-09-24 | Aisan Ind Co Ltd | Linear solenoid actuator |
| WO2001053847A1 (en) * | 2000-01-19 | 2001-07-26 | Millennium Technology Inc. | C-shaped magnetic resonance imaging system |
| JP2007097761A (en) * | 2005-10-03 | 2007-04-19 | Neomax Co Ltd | Magnetic field generator |
| JP2008067474A (en) * | 2006-09-06 | 2008-03-21 | Mitsui High Tec Inc | Rotor |
| CN102024546B (en) * | 2009-09-09 | 2012-03-07 | 中国石油天然气股份有限公司 | Gradient permanent magnet for constant gradient field rock sample analyzer |
| JP2011217913A (en) * | 2010-04-08 | 2011-11-04 | Mr Technology:Kk | Temperature control method and unit |
| CN101958623B (en) * | 2010-06-13 | 2013-01-30 | 上海川邻精密配件有限公司 | Permanent magnet rotating motor with high torque density, high power density and low disturbance |
| CN102110513B (en) * | 2010-12-15 | 2013-07-31 | 东南大学 | Magnetic circuit for detecting chip through nuclear magnetic resonance microscope |
| CN102735706B (en) * | 2012-07-18 | 2014-12-10 | 重庆大学 | Nuclear magnetic resonance sensor used for nondestructive aging resonance of umbrella skirt of composite insulator |
| JP5851365B2 (en) * | 2012-08-31 | 2016-02-03 | 日立オートモティブシステムズ株式会社 | Rotating electric machine |
| CN103219814B (en) * | 2013-04-09 | 2015-04-08 | 沈阳工业大学 | Asynchronous starting permanent magnet synchronous motor rotor based on permanent magnets with different residual magnetic densities |
-
2014
- 2014-10-24 CN CN201410579797.5A patent/CN104299749B/en active Active
- 2014-12-04 WO PCT/CN2014/093048 patent/WO2016061875A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6873077B2 (en) * | 2001-09-26 | 2005-03-29 | Vacuumschmelze Gmbh & Co. Kg | Shell-shaped magnet |
| CN1835340A (en) * | 2006-03-30 | 2006-09-20 | 上海大学 | 'V' type builti-in rotor of permanent megnet dynamo |
| CN102136341A (en) * | 2010-12-30 | 2011-07-27 | 包头稀土研究院 | Anisotropic V-shaped orienting magnet ring |
| CN202260721U (en) * | 2011-10-31 | 2012-05-30 | 上海中科深江电动车辆有限公司 | Internal rotor structure of permanent magnet motor |
| CN102426897A (en) * | 2011-12-20 | 2012-04-25 | 重庆大学 | Semi-elliptical-distributed open nuclear magnetic resonance permanent structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104299749A (en) | 2015-01-21 |
| WO2016061875A1 (en) | 2016-04-28 |
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