CN104348284A - Magnetic shield structure for brow leakage of motor coils of molecular pump - Google Patents
Magnetic shield structure for brow leakage of motor coils of molecular pump Download PDFInfo
- Publication number
- CN104348284A CN104348284A CN201410637239.XA CN201410637239A CN104348284A CN 104348284 A CN104348284 A CN 104348284A CN 201410637239 A CN201410637239 A CN 201410637239A CN 104348284 A CN104348284 A CN 104348284A
- Authority
- CN
- China
- Prior art keywords
- antifreeze plate
- magnetic
- molecular pump
- motor coil
- magnetic shield
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/42—Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding
Abstract
The invention provides a magnetic shield structure for brow leakage of motor coils of a molecular pump. Magnetic shield sheets in the magnetic shield structure are respectively made of soft magnetic ferrite, and are respectively spliced in magnetic shield sheet seats; the outer ring face of each compression ring is fixedly connected with the inner side of each magnetic shield sheet seat through gluing, and each magnetic shield sheet seat is compressed by the compression ring; the magnetic shield sheet seats are assembled on a motor stator shell in an interference manner. According to the magnetic shield structure provided by the invention, by adopting the magnetic shield sheets respectively made of the soft magnetic ferrite, a magnetic field formed by the brow leakage of each motor coil is effectively isolated, and the magnetic field intensity nearby an impeller in the molecular pump is reduced, and therefore the problem that the impeller emits heat due to the fact that magnetic lines are cut by the impeller to form eddy current is solved, and the stress and deformation of the impeller are further controlled.
Description
Technical field
The invention belongs to motor flux leakage shield technology field, be specifically related to a kind of magnetic shielding structure of molecular pump motor coil brow leakage.
Background technology
Molecular pump belongs to the pumping equipment of High Rotation Speed, comprises the compositions such as movable vane wheel, stator blade, high-speed electric expreess locomotive, rolling bearing.Molecular pump movable vane wheel is driven by high-speed electric expreess locomotive, and motor coil end exists the magnetic field that leakage field is formed.In order to solve this problem of leakage field, name is called the Chinese patent (patent publication No.: CN200920072033.1) of " direct current machine magnetic-leakage preventing structure ", disclose and install magnetic inductive block to reduce leakage field between motor case adjacent pole, but the magnetic permeability that there is gap and magnetic inductive block between magnetic inductive block is not high enough, the usefulness of therefore isolating leakage field magnetic field is lower; Name is called the Chinese patent (patent publication No.: CN103545963) of " synchronous generator stator end electric shielding structure ", disclose outside in coil and install copper shading ring to reduce the temperature rise of neighbouring part, but copper product every magnetic limited efficiency, control the scarce capacity of temperature rise; Name is called the Chinese patent (patent publication No.: CN201975883U) of " composite p-m rotor of magneto ", name is called in the Chinese patent (patent publication No.: CN202679099U) of " a kind of rotor of rare earth permanent-magnetic generator ", multi-disc permanent magnet combination is formed p-m rotor and reduces leakage field, structure is very complicated, but be thisly mainly used in large and middle size motor, and the motor size of molecular pump is less and rotating speed reaches tens thousand of revs/min, therefore the method is not suitable for.Due to molecular pump compact conformation, movable vane wheel is very little with motor coil spacing, and therefore movable vane wheel is in the magnetic field of leakage field formation.When motor rotates, continuous cutting motor end winding leakage field is formed the magnetic line of force in magnetic field by movable vane wheel, forms current vortex therein, and movable vane can be caused to take turns heating, and then affects intensity and the size of movable vane wheel.
Summary of the invention
In order to overcome prior art Middle molecule pump movable vane wheel because of current vortex cause generate heat deficiency, the invention provides a kind of magnetic shielding structure of molecular pump motor coil brow leakage.The present invention can shield the deficiency of the brow leakage of molecular pump motor coil, greatly reduces the magnetic field intensity at molecular pump movable vane wheel place, solves the problem that movable vane wheel generates heat because cutting magnetic line forms current vortex, and then controls the static stress and distortion of movable vane wheel.
Technical scheme of the present invention is as follows:
The magnetic shielding structure of molecular pump motor coil brow leakage of the present invention, is characterized in, the magnetic shielding structure of described molecular pump motor coil brow leakage comprises antifreeze plate, antifreeze plate seat, pressure ring, motor coil, electric machine iron core, motor stator casing.Its annexation is, in the antifreeze plate seat that described antifreeze plate is bonded in tubular on baseplane.On described pressure ring, plane contacts with antifreeze plate lower plane, and pressure ring outer ring surface is fixedly connected with inside antifreeze plate seat by gluing.Described electric machine iron core is positioned at immediately below pressure ring.Described motor coil is wrapped in the outside of electric machine iron core by above-below direction, and is positioned at the inner side of pressure ring.Described motor stator casing is fixed on the cylindrical anchor ring of electric machine iron core, is positioned at the antifreeze plate seat above motor stator casing and motor stator casing elastic conjunction.Described antifreeze plate, antifreeze plate seat, pressure ring, motor stator casing are concentric and arrange.
Described antifreeze plate adopts planar ring structure.
The material of described antifreeze plate adopts soft magnetic ferrite, and magnetic permeability is 2000 ~ 40000.
The material of described antifreeze plate seat adopt in aluminium alloy in non-magnet material, stainless steel, pottery, duralumin, aviation aluminium any one.
The material of described pressure ring adopt in aluminium alloy in non-magnet material, stainless steel, pottery, duralumin, aviation aluminium any one.
In miniature molecular pump, movable vane wheel is driven by high-speed electric expreess locomotive, and motor coil end exists the magnetic field that leakage field is formed.Due to molecular pump compact conformation, movable vane wheel is little with motor coil spacing, and therefore movable vane wheel is in the magnetic field of leakage field formation.When motor rotates, the magnetic field magnetic line that continuous cutting motor end winding leakage field is formed by movable vane wheel, forms current vortex therein, causes movable vane to take turns heating, affects intensity and the size of movable vane wheel.The magnetic shielding structure of molecular pump motor coil brow leakage of the present invention, places the antifreeze plate that soft magnetic ferrite is made, provides magnetic field shielding effect between motor coil and movable vane wheel.Adopt soft magnetic ferrite, magnetic permeability is high, energy shield electric machine coil leakage field magnetic field; Adopt planar ring structure to improve shaping efficiency, cut down finished cost.
The magnetic shielding structure beneficial effect of molecular pump motor coil brow leakage of the present invention is: the antifreeze plate adopting soft magnetic ferrite to make effectively has isolated the magnetic field that motor coil brow leakage is formed, reduce the magnetic field intensity near movable vane wheel in molecular pump, thus the problem that solution movable vane wheel generates heat because cutting magnetic line forms current vortex, and then control the static stress and distortion of movable vane wheel.
Accompanying drawing explanation
Fig. 1 is the magnetic shielding structure profile of molecular pump motor coil brow leakage of the present invention;
Fig. 2 is the antifreeze plate structural representation in Fig. 1;
In figure: 1. antifreeze plate 2. antifreeze plate seat 3. pressure ring 4. motor coil 5. electric machine iron core 6. motor stator casing.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described in detail:
Embodiment 1
Fig. 1 is the magnetic shielding structure profile of molecular pump motor coil brow leakage of the present invention, and Fig. 2 is the antifreeze plate structural representation in Fig. 1.In Fig. 1,2, the magnetic shielding structure of molecular pump motor coil brow leakage of the present invention, comprises antifreeze plate 1, antifreeze plate seat 2, pressure ring 3, motor coil 4, electric machine iron core 5, motor stator casing 6; Its annexation is, in the antifreeze plate seat 2 that described antifreeze plate 1 is bonded in tubular on baseplane; On described pressure ring 3, plane contacts with antifreeze plate 1 lower plane, and pressure ring 3 outer ring surface is fixedly connected with inside antifreeze plate seat 2 by gluing; Described electric machine iron core 5 is positioned at immediately below pressure ring 3; Described motor coil 4 is wrapped in the outside of electric machine iron core 5 by above-below direction, and is positioned at the inner side of pressure ring 3; Described motor stator casing 6 is fixed on the cylindrical anchor ring of electric machine iron core 5, is positioned at the antifreeze plate seat 2 above motor stator casing 6 and motor stator casing 6 elastic conjunction; Described antifreeze plate 1, antifreeze plate seat 2, pressure ring 3, motor stator casing 6 are concentric and arrange.
Described antifreeze plate 1 adopts planar ring structure.
The material of described antifreeze plate 1 adopts soft magnetic ferrite, and magnetic permeability is 2000 ~ 40000.
In the present embodiment, the material of antifreeze plate seat 2 adopts non-magnet material aluminium alloy.The material of pressure ring 3 adopts non-magnet material aluminium alloy.
Antifreeze plate 1 in the present invention, provides magnetic field shielding effect.Adopt soft magnetic ferrite, magnetic permeability is high, energy shield electric machine coil leakage field magnetic field; Adopt planar ring structure to improve shaping efficiency, cut down finished cost.
The magnetic shielding structure operating state of molecular pump motor coil brow leakage of the present invention is such: motor coil 4 exists brow leakage phenomenon, and molecular pump movable vane wheel is very little with motor coil 4 spacing, is in leakage field magnetic field.When movable vane wheel High Rotation Speed, the magnetic line of force in the magnetic field of leakage field formation is cut in meeting continuously, makes dynamic impeller internal produce current vortex, thus causes movable vane wheel temperature constantly to raise, and has a negative impact to its intensity and size.The magnetic field adopting the antifreeze plate 1 made of soft magnetic ferrite to isolate leakage field to be formed, solves the heating problem that movable vane wheel causes because of current vortex, eliminates the adverse effect of temperature rise to dynamic impeller intensity and size.
Embodiment 2
The present embodiment is identical with the structure of embodiment 1, and difference is, the material of antifreeze plate seat adopts non-magnet material aviation aluminium.The material of pressure ring adopts non-magnet material aviation aluminium.
Embodiment 3
The present embodiment is identical with the structure of embodiment 1, and difference is, the material of antifreeze plate seat adopts non-magnet material stainless steel.The material of pressure ring adopts non-magnet material stainless steel.
Claims (5)
1. the magnetic shielding structure of a molecular pump motor coil brow leakage, it is characterized in that, the magnetic shielding structure of described molecular pump motor coil brow leakage comprises antifreeze plate (1), antifreeze plate seat (2), pressure ring (3), motor coil (4), electric machine iron core (5), motor stator casing (6); Its annexation is, described antifreeze plate (1) is bonded on antifreeze plate seat (2) the interior baseplane of tubular; The upper plane of described pressure ring (3) contacts with antifreeze plate (1) lower plane, and pressure ring (3) outer ring surface is fixedly connected with antifreeze plate seat (2) inner side by gluing; Described electric machine iron core (5) is positioned at immediately below pressure ring (3); Described motor coil (4) is wrapped in the outside of electric machine iron core (5) by above-below direction, and is positioned at the inner side of pressure ring (3); Described motor stator casing (6) is fixed on the cylindrical anchor ring of electric machine iron core (5), is positioned at antifreeze plate seat (2) and motor stator casing (6) elastic conjunction of motor stator casing (6) top; Described antifreeze plate (1), antifreeze plate seat (2), pressure ring (3), motor stator casing (6) are concentric and arrange.
2. the magnetic shielding structure of molecular pump motor coil brow leakage according to claim 1, is characterized in that: described antifreeze plate (1) adopts planar ring structure.
3. the magnetic shielding structure of molecular pump motor coil brow leakage according to claim 1, is characterized in that: the material of described antifreeze plate (1) adopts soft magnetic ferrite, and magnetic permeability is 2000 ~ 40000.
4. the magnetic shielding structure of molecular pump motor coil brow leakage according to claim 1, is characterized in that: the material of described antifreeze plate seat (2) adopt in aluminium alloy in non-magnet material, stainless steel, pottery, duralumin, aviation aluminium any one.
5. the magnetic shielding structure of molecular pump motor coil brow leakage according to claim 1, is characterized in that: the material of described pressure ring (3) adopt in aluminium alloy in non-magnet material, stainless steel, pottery, duralumin, aviation aluminium any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410637239.XA CN104348284A (en) | 2014-11-13 | 2014-11-13 | Magnetic shield structure for brow leakage of motor coils of molecular pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410637239.XA CN104348284A (en) | 2014-11-13 | 2014-11-13 | Magnetic shield structure for brow leakage of motor coils of molecular pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104348284A true CN104348284A (en) | 2015-02-11 |
Family
ID=52503309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410637239.XA Pending CN104348284A (en) | 2014-11-13 | 2014-11-13 | Magnetic shield structure for brow leakage of motor coils of molecular pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104348284A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075590A (en) * | 2016-11-10 | 2018-05-25 | 李岳翰 | The packaging structure of winding |
| CN108923561A (en) * | 2018-08-17 | 2018-11-30 | 田振荣 | A kind of driving motor for electric automobile |
| CN111351844A (en) * | 2020-03-16 | 2020-06-30 | 中国工程物理研究院材料研究所 | Eddy current detection device based on superconducting quantum interferometer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008160909A (en) * | 2006-12-21 | 2008-07-10 | Nsk Ltd | Detector with built-in motor |
| CN102868266A (en) * | 2012-09-17 | 2013-01-09 | 北京航空航天大学 | High-reliability permanent-magnet synchronous motor based on redundancy and fault-tolerant technology |
| CN203788065U (en) * | 2014-01-15 | 2014-08-20 | 浙江深海泵业科技有限公司 | Stator shielding device for shield pump |
| CN204131269U (en) * | 2014-11-13 | 2015-01-28 | 中国工程物理研究院机械制造工艺研究所 | A kind of magnetic shielding structure of molecular pump motor coil brow leakage |
-
2014
- 2014-11-13 CN CN201410637239.XA patent/CN104348284A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008160909A (en) * | 2006-12-21 | 2008-07-10 | Nsk Ltd | Detector with built-in motor |
| CN102868266A (en) * | 2012-09-17 | 2013-01-09 | 北京航空航天大学 | High-reliability permanent-magnet synchronous motor based on redundancy and fault-tolerant technology |
| CN203788065U (en) * | 2014-01-15 | 2014-08-20 | 浙江深海泵业科技有限公司 | Stator shielding device for shield pump |
| CN204131269U (en) * | 2014-11-13 | 2015-01-28 | 中国工程物理研究院机械制造工艺研究所 | A kind of magnetic shielding structure of molecular pump motor coil brow leakage |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108075590A (en) * | 2016-11-10 | 2018-05-25 | 李岳翰 | The packaging structure of winding |
| CN108923561A (en) * | 2018-08-17 | 2018-11-30 | 田振荣 | A kind of driving motor for electric automobile |
| CN111351844A (en) * | 2020-03-16 | 2020-06-30 | 中国工程物理研究院材料研究所 | Eddy current detection device based on superconducting quantum interferometer |
| CN111351844B (en) * | 2020-03-16 | 2023-11-03 | 中国工程物理研究院材料研究所 | Vortex detecting device based on superconducting quantum interferometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109274240B (en) | Composite amorphous alloy axial flux motor | |
| CN106787310B (en) | A kind of magnetic-field-enhanced Consequent pole permanent magnet motor | |
| CN102754317A (en) | Rotor having a short circuit cage | |
| CN105048763A (en) | Single-phase cylindrical linear vibration motor | |
| CN102392852B (en) | Axial magnetic bearing | |
| CN104682641A (en) | Double-stator axial magnetic field motor | |
| CN204012963U (en) | High-power density external rotor DC brushless motor | |
| CN103269142B (en) | Molecular pump high-speed permanent magnet motor | |
| CN104348284A (en) | Magnetic shield structure for brow leakage of motor coils of molecular pump | |
| CN104184234A (en) | Hybrid excitation double-air-gap claw pole motor | |
| CN105680656A (en) | Axial structured permanent-magnet motor | |
| CN206250933U (en) | A kind of low-energy-efficiency asynchronous machine efficiently remanufactures AC permanent magnet motor | |
| CN205490055U (en) | Concentrated winding permanent magnet synchronous motor that special no bearing of compressor directly allies oneself with | |
| CN105048764A (en) | Single-phase cylindrical switch-reluctance linear motor | |
| CN204465161U (en) | A kind of single-phase transverse flux machine | |
| CN204103628U (en) | The two air gap claw-pole motor of a kind of composite excitation | |
| CN106451854B (en) | A kind of interdigital Consequent pole permanent magnet motor | |
| CN204131269U (en) | A kind of magnetic shielding structure of molecular pump motor coil brow leakage | |
| CN105048669A (en) | Novel embedded rotor of permanent magnet motor and processing method of novel embedded rotor | |
| CN105097183A (en) | Annular bonding neodymium iron boron magnet multi-pole segmented magnetizing device | |
| CN206332513U (en) | A kind of modular Thee-phase alternating current permanent-magnetic frequency control motor | |
| CN102497039A (en) | Novel built-in permanent magnet type variable reluctance motor for stator | |
| CN105186823A (en) | Double-rotor transverse-flux moving magnet type linear oscillatory motor and method | |
| CN201733147U (en) | Limited angle torque motor | |
| CN105915007B (en) | A kind of reluctance type disc type electric machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150211 |