CN202914514U - Insulating rotating shaft for motor - Google Patents
Insulating rotating shaft for motor Download PDFInfo
- Publication number
- CN202914514U CN202914514U CN 201220533467 CN201220533467U CN202914514U CN 202914514 U CN202914514 U CN 202914514U CN 201220533467 CN201220533467 CN 201220533467 CN 201220533467 U CN201220533467 U CN 201220533467U CN 202914514 U CN202914514 U CN 202914514U
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- insulation
- shaft body
- motor
- bearing
- 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.)
- Expired - Fee Related
Links
Landscapes
- Motor Or Generator Frames (AREA)
Abstract
The utility model belongs to the field of motor fabrication and provides an insulating rotating shaft of a motor, and aims to solve the technical problem that a technical scheme which is over high in cost and low in reliability is adopted to eliminate harms caused by motor shaft current. The insulating rotating shaft comprises a rotating shaft body and is characterized in that an insulating layer(s) is (are) arranged at one position, multiple positions, or the whole surface of the rotating shaft body. The insulating rotating shaft has the advantages of simple structure, easiness in realization, fastness, reliability and low cost. Due to the adoption of the insulating rotating shaft, shaft current loop can be well blocked, so as to protect bearings, encoders and other components mounted on the rotating shaft. With the insulating layer on the surface of the rotating shaft body, the serviceable range of the rotating shaft can be effectively expanded.
Description
Technical field
The utility model belongs to field of motor manufacturing, relates in particular to the insulation rotating shaft of a kind of motor.
Background technique
In field of motor manufacturing, each position induction magnetic potential is unequal because the equal factor of electric machine iron core magnetic resistance imbalance and the distributed capacity of winding in motor causes in the iron core, this magnetic potential difference can produce zero sequence voltage component and then produce zero-sequence current component in the closed-loop path between iron core, bearing, rotating shaft, this zero-sequence current will cause the electro erosion of motor bearings, and then affect working life of motor, particularly at variable-frequency motor, that the actuating motor field produces the shaft current situation is especially serious.
Solve at present shaft current for the method for bearing harm mainly by following 2 kinds.1, insulation bearing take deep groove ball bearing as example, can adopt the ceramic ball such as silicon nitride or zirconium oxide to do bearing ball and form the hybrid ceramic insulation bearing.The cost of this insulation bearing is about about 5-10 times of common same model bearing, and small-sized the reaching that accounts for prime cost at construction cost is difficult in the following motor generally use.2, insulated end cover is made bilayer or multi-layer structure with the electric motor end cap bearing chamber, and folder one deck insulation film respectively fills up one deck insulation film in the bearing both sides simultaneously between two-layer or between bearing and bearing chamber.This construction cost is lower, but insulation film is vulnerable to pollute and invalid, and micro-machine is subjected to spatial constraints serious simultaneously, and the existence of insulation film can cause the end cap stress not good, also has the security risk such as insulation ag(e)ing.
Summary of the invention
For overcoming the low technical problem of technological scheme high cost, reliability that adopts for eliminating the harm of motor shaft electric current at present; the utility model provides a kind of simple structure, be easy to realize, solid and reliable, motor that cost is low is with the insulation rotating shaft; can well block the shaft current loop to reach, the technical purpose of protecting being assembled to the parts such as bearing in the rotating shaft, encoder.
For reaching above-mentioned technical purpose, the technical solution adopted in the utility model is: motor insulation rotating shaft, comprise the rotating shaft body, it is characterized in that: described rotating shaft body, at the place wherein of its body surface or plurality of positions or whole body surface be provided with isolation layer.
The position that described rotating shaft body is provided with isolation layer comprises that bearing is positioned at bearing guard position on the rotating shaft body and encoder and is positioned at mounting point on the rotating shaft body.
Described isolation layer is alumina ceramic coating, oxidation film layer, ceramic insulation cover or polyester insulated cover.
The thickness of described alumina ceramic coating is 0.015-0.03mm.
The thickness of described oxidation film layer is 0.005-0.015mm.
The thickness of described ceramic insulation cover or polyester insulated cover is 0.2-0.5mm.
Described ceramic insulation cover or polyester insulated cover and rotating shaft body adopt interference fit, magnitude of interference 0.01-0.03mm.
The motor that the utility model provides with the insulation rotating shaft have simple structure, be easy to realize, solid and reliable, advantage that cost is low; adopt this insulation rotating shaft can well block the shaft current loop, protect being assembled to the parts such as bearing in the rotating shaft, encoder.By being set at the rotating shaft body surface, isolation layer can effectively open up the using scope of prolonging bearing.
Description of drawings
This rotating shaft of accompanying drawing and bearing in conjunction with schematic representation.
Among the figure, 1, the rotating shaft body, 2, the bearing guard position, 3, bearing, 4, isolation layer.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
As shown in drawings, motor comprises rotating shaft body 1 with the insulation rotating shaft, and rotating shaft body 1 is provided with for the bearing guard position 2 that bearing 3 is installed.
As shown in drawings, be provided with isolation layer 4 on the surface of bearing guard position 2.
This embodiment shows the isolation layer 4 that is provided with in the bearing guard position, two places 2 of rotating shaft body 1, when practical application, can isolation layer 4 be set in the plurality of positions of rotating shaft body 1 or the surface of whole rotating shaft body 1.For example can also isolation layer 4 be set in the position that encoder is installed, prevent that shaft current from causing damage to encoder, protects encoder.
Isolation layer 4 shown in the accompanying drawing can be fixed on by the method for coating, heat treatment and interference fit on the rotating shaft body 1, isolation layer 4 is combined closely with the surface of rotating shaft body 1, wherein isolation layer 4 can adopt aluminium oxide ceramics coating, also can adopt by methods such as oxidation, blackouts and generate patina, also can consist of for adopting ceramic insulation cover or polyester insulated cover, and be not limited to the method for above several formation isolation layers.
The concrete setting steps of this isolation layer 4 is as follows:
1, cleaning in early stage, cleaning: remove the rotating shaft body surface because remaining iron filings, the dust of processing accumulating, then with the whole immersion of the rotating shaft after preliminary cleaning or local the immersion in the cleaning solvent, remove surface and oil contaminant, rusty stain, obtain treating the rotating shaft body of insulating surface cleaning.
2. insulation processing:
One of them scheme: 1 layer of the required position coating alumina ceramic insulating layer that isolation layer is set of rotating shaft body 1, coating thickness is between 0.015-0.03mm behind the correct grinding.
One of them scheme: carrying out blackening process formation oxidation film layer in the wherein position, a place on rotating shaft body 1 surface or the surface of position, a few place or whole rotating shaft body 1, the anodized insulation layer thickness after the blackout is between 0.005-0.015mm.
One of them scheme: at rotating shaft body 1 a required ceramic insulation cover of position assembling or the polyester insulated cover that isolation layer is set, insulating bush and rotating shaft interference fit, magnitude of interference is between 0.01-0.03mm, and insulating bush thickness is between 0.2-0.5mm.
3. later stage cleaning, cleaning:
Rotating shaft body through above processing is cleared up, removed the surface and floating defective material, obtain clean insulation rotating shaft body.
4. sealing is processed:
Through the rotating shaft body of above insulation processing, do sealing with epoxy resin, make the rotating shaft body have good water-fast, oil resistant characteristic.
5. polishing treatment:
Rotating shaft body to above processing carries out the buffing processing.
Claims (7)
1. motor comprises the rotating shaft body with the insulation rotating shaft, it is characterized in that: described rotating shaft body, at the place wherein of its body surface or plurality of positions or whole body surface be provided with isolation layer.
2. motor according to claim 1 is characterized in that with the insulation rotating shaft: the position that described rotating shaft body is provided with isolation layer comprises that bearing is positioned at bearing guard position on the rotating shaft body and encoder and is positioned at mounting point on the rotating shaft body.
3. motor according to claim 1 insulation rotating shaft is characterized in that: described isolation layer is alumina ceramic coating, oxidation film layer, ceramic insulation cover or polyester insulated cover.
4. motor according to claim 3 insulation rotating shaft, it is characterized in that: the thickness of described alumina ceramic coating is 0.015-0.03mm.
5. motor according to claim 3 insulation rotating shaft, it is characterized in that: the thickness of described oxidation film layer is 0.005-0.015mm.
6. motor according to claim 3 insulation rotating shaft is characterized in that: the thickness of described ceramic insulation cover or polyester insulated cover is 0.2-0.5mm.
According to claim 3 or 6 described motors with the insulation rotating shafts, it is characterized in that: described ceramic insulation cover or polyester insulated cover and rotating shaft body employing interference fit, magnitude of interference 0.01-0.03mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220533467 CN202914514U (en) | 2012-10-18 | 2012-10-18 | Insulating rotating shaft for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220533467 CN202914514U (en) | 2012-10-18 | 2012-10-18 | Insulating rotating shaft for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202914514U true CN202914514U (en) | 2013-05-01 |
Family
ID=48162833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220533467 Expired - Fee Related CN202914514U (en) | 2012-10-18 | 2012-10-18 | Insulating rotating shaft for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202914514U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973043A (en) * | 2013-01-31 | 2014-08-06 | 台达电子工业股份有限公司 | Motor |
| WO2022152130A1 (en) * | 2021-01-15 | 2022-07-21 | 华为数字能源技术有限公司 | Electric motor shaft, electric motor and electric vehicle |
-
2012
- 2012-10-18 CN CN 201220533467 patent/CN202914514U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973043A (en) * | 2013-01-31 | 2014-08-06 | 台达电子工业股份有限公司 | Motor |
| WO2022152130A1 (en) * | 2021-01-15 | 2022-07-21 | 华为数字能源技术有限公司 | Electric motor shaft, electric motor and electric vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102913543A (en) | Insulating rotation shaft used for motor | |
| EP3240144B1 (en) | Sleeve rotor synchronous reluctance electric machine | |
| ES2661613T3 (en) | Rotor for permanent magnet rotary machine | |
| US8823478B2 (en) | Rare earth sintered magnet, method for producing same, motor and automobile | |
| CN202914514U (en) | Insulating rotating shaft for motor | |
| US20110234038A1 (en) | Rotor and permanent magnet rotating machine | |
| US20110278967A1 (en) | Rotor for electric rotating machine | |
| CN207652160U (en) | Motor | |
| Tanaka et al. | Application of high-strength nonoriented electrical steel to interior permanent magnet synchronous motor | |
| US6121709A (en) | Rotor assembly having bonded lamination stack | |
| CN206302315U (en) | A kind of aluminium busbar rotor structure | |
| CN108779802A (en) | Bearing race with insulating coating | |
| CN112458394A (en) | Thermal spraying ceramic insulating coating and preparation method thereof | |
| US7843092B2 (en) | Core and method for producing core | |
| CN112332572A (en) | Rotor for an electric machine | |
| CN103556099A (en) | Processing method of rolling bearing surface electric-insulation layer | |
| US6772503B1 (en) | Rotor assembly having bonded lamination stack | |
| JP2021013298A (en) | Electric machine | |
| CN101640456B (en) | Method for machining magnetic poles on AC/AC variable-frequency steel-rolling motor rotors | |
| CN209730960U (en) | A kind of insulation shaft for motor | |
| US20230378854A1 (en) | Electrical Machine, Method, and System | |
| JP2008271714A (en) | Method of manufacturing rotating electrical machine | |
| CN102790457A (en) | Permanent magnet auxiliary synchronized reluctance motor rotor and motor thereof and installation method of motor | |
| CN106712365A (en) | Combined bearing magnetic suspension motor/electric spindle | |
| CN215120372U (en) | Motor external rotor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20151018 |
|
| EXPY | Termination of patent right or utility model |