CN206850539U - A kind of insulation rotor structure - Google Patents
A kind of insulation rotor structure Download PDFInfo
- Publication number
- CN206850539U CN206850539U CN201621385849.6U CN201621385849U CN206850539U CN 206850539 U CN206850539 U CN 206850539U CN 201621385849 U CN201621385849 U CN 201621385849U CN 206850539 U CN206850539 U CN 206850539U
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- China
- Prior art keywords
- rotor
- iron core
- insulation
- outer rotor
- yoke
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A kind of insulation rotor structure, including permanet magnet, outer rotor yoke, internal rotor iron core, it is filled between the outer rotor yoke and internal rotor iron core and is more than the thick annular PBT plastics of 5mm, described PBT plastic has circumferentially been arranged alternately kidney slot and circular hole, and described kidney slot and circular hole leave wall thickness.The structure that the utility model rotor is insulated using rotating shaft with the powered position of rotor, rotor core is become into two parts by a part, it is made up of internal rotor iron core and outer rotor yoke, PBT plastic is filled between the two so as to play a part of external insulation so that the probability and degree that electrostatic corrosion occurs are greatly reduced.
Description
Technical field
Micro ＆ Special Motor Technology field is the utility model is related to, is insulated more particularly, to the one kind used on micro machine
Rotor structure.
Background technology
With the direct current variable frequency motor on central air-conditioning fan coil, rotor is using permanet magnet and rotor core integration
Injection structure, rotor core are made up of silicon steel sheet, are permeability magnetic materials.Permanet magnet is in rotor core exterior surface according to number of magnetic poles etc.
Divide uniformly, an entirety is molded into by PBT material filling, rotating shaft is arranged in rotor core endoporus.In motor operation course,
Rotor surface produces induced electromotive force, and rotor core, permanet magnet and rotating shaft are equipotentiality bodies.Bearing is arranged on rotating shaft both ends, axle
The lubrication groove held also is in same potential with rotor.The foreign steamer of bearing is contacted with the bearing chamber on end cap, and ring is dried when motor is in
During border, motor surface electrostatic lotus assembles, and electrostatic charge is similarly carried on bearing foreign steamer.So electricity is generated between bearing internal external wheel
Potential difference, forms electric charge and is moved between interior foreign steamer, and electric discharge phenomena are produced on bearing steel ball surface.In the course of time, steel ball surface produces
Abrasion caused by electric spark, bearing abnormal sound produce.Bad caused claim, reason are exactly bearing and electricity as in the market appearance
Sublist face is in same potential, adds the potential difference of bearing internal external wheel, causes electrostatic corrosion.
Utility model content
The purpose of this utility model is to provide a kind of insulation rotor structure that can effectively reduce the corrosion of bearing electrostatic.
Technical problem to be solved in the utility model realized using following technical scheme, the purpose of this utility model
It is achieved in that a kind of insulation rotor structure, including permanet magnet, outer rotor yoke, internal rotor iron core, it is characterised in that：
It is filled between the outer rotor yoke and internal rotor iron core and is more than the thick annular PBT plastics of 5mm, described PBT plastic week
To kidney slot and circular hole has been arranged alternately, described kidney slot and circular hole leave wall thickness.
Also include the positioning hole I for fixing the internal rotor iron core, for fixing the circumference of the outer rotor yoke
The positioning hole II of direction position, for fixing the positioning hole III of the axial location of the outer rotor yoke, for described in fixed forever
The positioning hole IV of long magnetite axial location.
The external peripheral surface of described outer rotor yoke is provided with the wedge-shaped protrusion for separating permanet magnet, the wedge-shaped protrusion
Head set in echelon, root is provided with two circular grooves.
The inner circumferential surface of described outer rotor yoke is provided with the dovetail groove equal with number of magnetic poles.
The semi-circular recesses and triangular hill being arranged alternately are designed with described internal rotor iron core excircle.
Described kidney-shaped trench bottom is provided with 20 ° of gradient, thin interior thickness outside its wall thickness formed.
The utility model insulation rotor structure using the powered position insulation of rotating shaft and rotor structure, i.e., by rotor core by
One part becomes two parts, is made up of respectively internal rotor iron core and outer rotor yoke, fills PBT plastic between the two and plays
The effect of external insulation, such permanet magnet are distributed in the outer surface of outer rotor yoke, and both produce sensing after stator energization
Electromotive force, there is same potential, and caused induced electromotive force is then very low on internal rotor iron core can be ignored, and is substantially at
Zero potential.Rotating shaft is by the endoporus of internal rotor iron core, therefore the current potential in bearing lubrication groove is identical with internal rotor iron core, in zero electricity
Position, so when due to electrostatic interaction makes bearing foreign steamer powered when, bearing lubrication groove zero potential, potential difference declines between interior foreign steamer, hair
The probability and degree of raw electrostatic corrosion are greatly reduced.
Brief description of the drawings
Fig. 1 is the utility model insulation injection rotor structure schematic diagram；
Fig. 2 is the sectional elevation of the utility model insulation injection rotor；
Fig. 3 is Fig. 1 A-A sectional views；
Fig. 4 is the utility model outer rotor magnetic yoke structure schematic diagram；
Fig. 5 is close-up schematic view at Fig. 4 B；
Fig. 6 is the utility model internal rotor core structure schematic diagram.
1. permanet magnet in figure, 2. outer rotor yokes, 3. internal rotor iron cores, 4.PBT plastics, 5 kidney slots, 6. circular holes, 7 is fixed
Position hole I, 8. positioning holes II, 9. positioning holes III, 10. positioning holes IV, 11. wall thickness, 12 wedge-shaped protrusions, 13. dovetail grooves, 14. semicircles
Connected in star, 15. triangular hills.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings, but not as to limitation of the present utility model：
In Fig. 2, a kind of insulation rotor structure, by permanet magnet 1, outer rotor yoke 2, internal rotor iron core 3, PBT plastic（It is poly-
Mutual-phenenyl two acid bromide two alcohol ester）4 in mould injection molding be integrated.Wherein filled between internal rotor iron core 3 and outer rotor yoke 2
PBT, between the two apart from 5mm is more than, the static capacity that distance more carries on greater trochanter between the two is smaller, and shaft voltage is lower,
The possibility for causing electrostatic to corrode is also lower.
As shown in figure 1, each part of rotor, in mould during injection molding, positioning hole required for each part is as follows, positioning hole I
7 be the fabrication hole of fixed internal rotor iron core 3, makes internal rotor iron core 3 radial and axial while position；Positioning hole II 8 is used for solid
Determine the circumferential locations of outer rotor yoke 2；Positioning hole III 9 is used for fixing the axial location of outer rotor yoke 2；Positioning hole IV 10
For fixing the axial location of permanet magnet 1.
After above-mentioned permanet magnet 1, outer rotor yoke 2, internal rotor iron core 3 are put into mould by position of positioning hole, by molten molten
PBT plastic 4 is injected will be stuffed entirely with completely, it is overall being configured to an injection rotor in the space of each component.In outer rotor rim 2
External peripheral surface, be designed with separate permanet magnet 1 wedge-shaped protrusion 12, as shown in figure 5, the head design of wedge-shaped protrusion 12 into
Trapezoidal, root is designed to two circular grooves.As shown in figure 3, after PBT plastic 4 is molded, the root of wedge-shaped protrusion 12 fills
PBT plastic 4, it can so increase the fixing intensity of permanet magnet 1, when rotor rotates at a high speed, the PBT of wedge-shaped root circular arc
It is not easy to deviate from from outer rotor yoke 2, ensure that permanet magnet 1 will not deviate from rotor surface due to big centrifugal force.It is outer to turn
Dovetail groove 13 is designed with the inner periphery of sub- yoke 2, is molded the structure after PBT as shown in figure 3, PBT plastic 4 is filled in dovetail groove
In 13, make outer rotor yoke 2 radially fixed, big radial direction moment of torsion can be born, outer rotor magnetic will not be produced under the action of the centrifugal force
Yoke 2 separates with PBT plastic 4.
As shown in fig. 6, the periphery of internal rotor iron core 3 is designed to that triangular hill 15 and semi-circular recesses 14 are arranged alternately formula
Sample, it is that the circumferencial direction of internal rotor iron core 3 is fixed, and can bear high pulling torque after being molded PBT plastic 4 that it, which is acted on,.
In order to reduce rotor surface static capacity, the PBT plastic 4 filled between internal rotor iron core 3 and outer rotor yoke 2,
Kidney slot 5 and circular hole 6 are designed, because the dielectric constant of air is more than PBT, it is possible to rotor surface static capacity is reduced,
So as to reduce the generation of electrostatic corrosion.This kidney slot 5 and circular hole 6 are not through holes, in the rotor between leave certain wall thickness 11, can
To increase the radial direction moment of torsion that rotor is born.And the bottom design of kidney slot 5 is into certain gradient, preferably 20 °, what it was formed
Thin interior thickness outside wall thickness, so in variation of ambient temperature, PBT plastic 4 will not ftracture because of expanding with heat and contract with cold.
Above-described embodiment of the present utility model, it is only to clearly demonstrate the citing that the utility model is done, but is not used to
The scope of protection of the utility model is limited, all equivalent technical schemes fall within category of the present utility model, the utility model
Scope of patent protection should be limited by every claim.
Claims (6)
1. a kind of insulation rotor structure, including permanet magnet（1）, outer rotor yoke（2）, internal rotor iron core（3）, its feature exists
In：The outer rotor yoke（2）With internal rotor iron core（3）Between be filled with and be more than the thick annular PBT plastics of 5mm（4）, it is described
PBT plastic（4）Circumferentially kidney slot has been arranged alternately it（5）And circular hole（6）, described kidney slot（5）And circular hole（6）Leave wall
It is thick（11）.
A kind of 2. insulation rotor structure according to claim 1, it is characterised in that：Also include and turn for fixing in described
Sub- iron core（3）Positioning hole I（7）, for fixing the outer rotor yoke（2）Circumferential locations positioning hole II（8）, use
To fix the outer rotor yoke（2）Axial location positioning hole III（9）, for fixing the permanet magnet（1）Axial position
The positioning hole IV put（10）.
A kind of 3. insulation rotor structure according to claim 1 or 2, it is characterised in that：Described outer rotor yoke（2）'s
External peripheral surface is provided with separation permanet magnet（1）Wedge-shaped protrusion（12）, the wedge-shaped protrusion（12）Head be arranged to ladder
Shape, root are provided with two circular grooves.
A kind of 4. insulation rotor structure according to claim 1 or 2, it is characterised in that：Described outer rotor yoke（2）'s
Inner circumferential surface is provided with the dovetail groove equal with number of magnetic poles（13）.
A kind of 5. insulation rotor structure according to claim 1 or 2, it is characterised in that：Described internal rotor iron core（3）Outside
The semi-circular recesses being arranged alternately are designed with circumference（14）And triangular hill（15）.
A kind of 6. insulation rotor structure according to claim 1, it is characterised in that：Described kidney slot（5）Bottom is set
There is 20 ° of gradient, its wall thickness formed（11）Outer thin interior thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385849.6U CN206850539U (en) | 2016-12-16 | 2016-12-16 | A kind of insulation rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621385849.6U CN206850539U (en) | 2016-12-16 | 2016-12-16 | A kind of insulation rotor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206850539U true CN206850539U (en) | 2018-01-05 |
Family
ID=60789357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621385849.6U Active CN206850539U (en) | 2016-12-16 | 2016-12-16 | A kind of insulation rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206850539U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787313A (en) * | 2016-12-16 | 2017-05-31 | 江苏富天江电子电器有限公司 | A kind of insulation rotor structure |
-
2016
- 2016-12-16 CN CN201621385849.6U patent/CN206850539U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787313A (en) * | 2016-12-16 | 2017-05-31 | 江苏富天江电子电器有限公司 | A kind of insulation rotor structure |
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