CN103343770A - Electrolytic corrosion preventive insulated rotating shaft for motor - Google Patents
Electrolytic corrosion preventive insulated rotating shaft for motor Download PDFInfo
- Publication number
- CN103343770A CN103343770A CN2013102722987A CN201310272298A CN103343770A CN 103343770 A CN103343770 A CN 103343770A CN 2013102722987 A CN2013102722987 A CN 2013102722987A CN 201310272298 A CN201310272298 A CN 201310272298A CN 103343770 A CN103343770 A CN 103343770A
- Authority
- CN
- China
- Prior art keywords
- rotating shaft
- insulated
- motor
- bearing
- electrolytic corrosion
- 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
Images
Landscapes
- Motor Or Generator Frames (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention relates to the field of motor parts, and in particular relates to an electrolytic corrosion preventive insulated rotating shaft for a motor. The electrolytic corrosion preventive insulated rotating shaft comprises a rotating shaft body, an alumina ceramic insulation layer coated on parts, at a bearing and an external seal ring, of the rotating shaft body, wherein the thickness of the alumina ceramic insulation layer is 0.2-0.5mm. According to the electrolytic corrosion preventive insulated rotating shaft for the motor, the mechanic strength of the alumina ceramic insulation layer is good, abrasion and scrap are not easily caused during the using process, as the insulated layer is at the bearing and external seal ring, the relative area is small, the capacitance C is less, high-frequency alternating current is beneficially limited to pass through, normal operation of the motor is not influenced, and the insulated rotating shaft can well cut off the loop of an inductive current. The usability of the electrolytic corrosion preventive insulated rotating shaft is superior to those of an insulated bearing and an insulated end cap adopted at the present, thus capable of replacing the expensive insulated bearing and insulated end caps with unstable performance.
Description
Technical field
The present invention relates to the motor component field, specifically is a kind of motor insulation rotating shaft that prevents galvanic corrosion.
Background technique
Comprise stator 1, rotor (comprising rotor core 2 and rotating shaft body 3 etc.), end cap 4, be placed in bearing 5 and outer seal ring 6 on the rotating shaft body 3.Owing to reasons such as magnetic circuit are asymmetric, the shaft voltage that will between stator 1 and rotor, produce, the effect of shaft voltage can make bearing 5 that galvanic corrosion take place.Particularly situation is particularly serious in the traction asynchronous motor that adopts the VVVF inverter power supply.After galvanic corrosion took place, gently then bearing 5 running noises can obviously increase, and heavy then bearing 5 is with very fast scaling loss.
In order to prevent the generation of galvanic corrosion phenomenon, present common way is to adopt insulation bearing and insulated end cover technology, cuts off faradic loop.Insulation bearing is in the outer ring of bearing 5 or inner ring has sprayed that alumina ceramic insulating layer forms, mechanical strength based on inside and outside circle itself considers that generally isolation layer is all extremely thin, has only 0.1～0.2mm thick, in case the isolation layer breakage, insulation will be lost efficacy.And when adopting the insulated end cover technology, its isolation layer is made of no latitude band, sticks on end cap 4 the diameters bigger cylindrical and end face, because the relative area that end cap 4 and stator are 1 is very big, under the situation of same dielectric thickness, capacitor C is very big therebetween, still has bigger high-frequency alternating current by bearing 5; The isolation layer that no latitude band forms uses the problem that has aging distortion for a long time, can bring certain influence to the bearing chamber form and position tolerance, influences the normal operation of motor.
Summary of the invention
The present invention provides a kind of motor insulation rotating shaft that prevents galvanic corrosion in order to prevent the generation of galvanic corrosion phenomenon.
The present invention is achieved by the following technical solutions: can prevent the motor insulation rotating shaft of galvanic corrosion, comprise the rotating shaft body, the rotating shaft body that is positioned at bearing and outer seal ring place is coated with alumina ceramic insulating layer, and the thickness of this alumina ceramic insulating layer is 0.2～0.5mm.
The thickness of alumina ceramic insulating layer is 0.2～0.5mm among the present invention, if the thickness of alumina ceramic insulating layer is less than 0.2mm, the dielectric strength of this isolation layer is low, insulating properties is bad, and its mechanical strength is not high, and easily friction is impaired in the process that bearing is installed; If the thickness of alumina ceramic insulating layer, need not greater than 0.5mm based on the consideration of insulating properties aspect greater than 0.5mm, if greater than 0.5mm, the adhesive quality of aluminium oxide ceramics is bad simultaneously, and easy to crack peeling off influences insulating property.
The motor insulation rotating shaft that prevents galvanic corrosion of the present invention, the mechanical strength of its alumina ceramic insulating layer is good, easy to wear scrapping not in the process of using, because isolation layer is positioned at bearing and outer seal ring place, relative area is less, and capacitor C is little, is conducive to limit high-frequency alternating current and passes through, do not influence the normal operation of motor, adopt this insulation rotating shaft can cut off faradic loop well; The present invention surmounts the way of present employing insulation bearing and insulated end cover fully on usability, can substitute the insulated end cover technology of expensive insulation bearing and unstable properties fully.
Description of drawings
Fig. 1 is the internal structure of motor schematic representation.
Among the figure: 1-rotating shaft, 2-rotor core, 3-rotating shaft body, 4-end cap, 5-bearing, the outer seal ring of 6-, 7-alumina ceramic insulating layer.
Embodiment
Can prevent that the motor of galvanic corrosion from the insulation rotating shaft, comprising rotating shaft body 3, the rotating shaft body 3 that is positioned at bearing 5 and outer seal ring 6 places is coated with alumina ceramic insulating layer 7, and the thickness of this alumina ceramic insulating layer 7 is 0.2～0.5mm.
Claims (1)
1. can prevent the motor insulation rotating shaft of galvanic corrosion, comprise rotating shaft body (3), it is characterized in that be positioned at the rotating shaft body (3) that bearing (5) and outer seal ring (6) locate and be coated with alumina ceramic insulating layer (7), the thickness of this alumina ceramic insulating layer (7) is 0.2～0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102722987A CN103343770A (en) | 2013-07-02 | 2013-07-02 | Electrolytic corrosion preventive insulated rotating shaft for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102722987A CN103343770A (en) | 2013-07-02 | 2013-07-02 | Electrolytic corrosion preventive insulated rotating shaft for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103343770A true CN103343770A (en) | 2013-10-09 |
Family
ID=49278592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102722987A Pending CN103343770A (en) | 2013-07-02 | 2013-07-02 | Electrolytic corrosion preventive insulated rotating shaft for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103343770A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242542A (en) * | 2014-10-22 | 2014-12-24 | 珠海格力电器股份有限公司 | Motor and insulation treatment method for output shaft of motor |
| CN109713836A (en) * | 2018-12-28 | 2019-05-03 | 华为数字技术（苏州）有限公司 | A kind of motor central spindle, the processing method of motor and motor central spindle |
| CN117879235A (en) * | 2024-01-05 | 2024-04-12 | 中山市霆宇金属制造有限公司 | Motor shaft capable of preventing current from being corroded and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009097717A (en) * | 2007-09-25 | 2009-05-07 | Toray Ind Inc | Torque transmission shaft and its manufacturing method |
| CN201266862Y (en) * | 2008-10-17 | 2009-07-01 | 永济新时速电机电器有限责任公司 | End cap device of DC motor |
| CN202545537U (en) * | 2012-03-19 | 2012-11-21 | 元贺股份有限公司 | Shaft voltage insulating device |
| CN102913543A (en) * | 2012-10-18 | 2013-02-06 | 山东华力电机集团股份有限公司 | Insulating rotation shaft used for motor |
| CN102966673A (en) * | 2012-12-04 | 2013-03-13 | 普光新高（北京）技术开发有限公司 | Electric-isolation rotating shaft device |
| CN203335611U (en) * | 2013-07-02 | 2013-12-11 | 永济新时速电机电器有限责任公司 | Insulation rotary shaft for motor for preventing electrolytic corrosion |
-
2013
- 2013-07-02 CN CN2013102722987A patent/CN103343770A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009097717A (en) * | 2007-09-25 | 2009-05-07 | Toray Ind Inc | Torque transmission shaft and its manufacturing method |
| CN201266862Y (en) * | 2008-10-17 | 2009-07-01 | 永济新时速电机电器有限责任公司 | End cap device of DC motor |
| CN202545537U (en) * | 2012-03-19 | 2012-11-21 | 元贺股份有限公司 | Shaft voltage insulating device |
| CN102913543A (en) * | 2012-10-18 | 2013-02-06 | 山东华力电机集团股份有限公司 | Insulating rotation shaft used for motor |
| CN102966673A (en) * | 2012-12-04 | 2013-03-13 | 普光新高（北京）技术开发有限公司 | Electric-isolation rotating shaft device |
| CN203335611U (en) * | 2013-07-02 | 2013-12-11 | 永济新时速电机电器有限责任公司 | Insulation rotary shaft for motor for preventing electrolytic corrosion |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242542A (en) * | 2014-10-22 | 2014-12-24 | 珠海格力电器股份有限公司 | Motor and insulation treatment method for output shaft of motor |
| CN109713836A (en) * | 2018-12-28 | 2019-05-03 | 华为数字技术（苏州）有限公司 | A kind of motor central spindle, the processing method of motor and motor central spindle |
| CN117879235A (en) * | 2024-01-05 | 2024-04-12 | 中山市霆宇金属制造有限公司 | Motor shaft capable of preventing current from being corroded and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103343770A (en) | Electrolytic corrosion preventive insulated rotating shaft for motor | |
| JP2008263698A (en) | Electromotor | |
| CN208955838U (en) | A kind of shaft current elimination structure of permanent-magnet synchronous driving motor for electric vehicle | |
| CN203335611U (en) | Insulation rotary shaft for motor for preventing electrolytic corrosion | |
| CN101908785B (en) | Motor | |
| CN202444391U (en) | Permanent magnetic assisted synchronous reluctance motor and rotor thereof | |
| US9780626B2 (en) | Rotor of rotary electric machine | |
| WO2011019136A3 (en) | Electrical insulation apparatus for a bearing | |
| CN203166676U (en) | Insulating structure of motor bearing chamber | |
| CN204205796U (en) | A kind of bearing insulation structure of variable-frequency motor | |
| CN201854126U (en) | Bearing insulation device of variable-frequency motor | |
| CN210225085U (en) | Permanent magnet motor rotor structure for enhancing shielding effect of harmonic magnetic field | |
| CN201590705U (en) | Insulated bearing sleeve used for motor | |
| CN103457392A (en) | Bearing structure capable of removing shaft currents | |
| CN202260768U (en) | Insulation end cover for wind driven generator | |
| CN201536023U (en) | Corona resistant polyimide film sintered copper flat wire | |
| CN209692483U (en) | A kind of alternating-current variable frequency motor insulation system | |
| WO2013088670A1 (en) | Brushless motor | |
| CN201975868U (en) | Glue pouring motor stator assembly | |
| CN202475096U (en) | Three-in-one insulating end cover structure | |
| CN102364828A (en) | Insulated end cover of wind power generator | |
| CN112762096A (en) | Bearing and direct current motor | |
| CN210629279U (en) | Encoder insulating metal shaft structure and encoder | |
| CN218301093U (en) | Bearing insulation device for variable frequency motor and high-power dipolar motor | |
| CN202663221U (en) | Motor of heading 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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131009 |