CN114465401B - Electric corrosion prevention motor - Google Patents
Electric corrosion prevention motor Download PDFInfo
- Publication number
- CN114465401B CN114465401B CN202210295651.2A CN202210295651A CN114465401B CN 114465401 B CN114465401 B CN 114465401B CN 202210295651 A CN202210295651 A CN 202210295651A CN 114465401 B CN114465401 B CN 114465401B
- Authority
- CN
- China
- Prior art keywords
- motor shaft
- rotor
- connecting hole
- motor
- wall
- 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.)
- Active
Links
- 238000005536 corrosion prevention Methods 0.000 title claims abstract description 8
- 238000005260 corrosion Methods 0.000 claims abstract description 17
- 230000007797 corrosion Effects 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims description 4
- 239000006223 plastic coating Substances 0.000 claims description 4
- 241000276425 Xiphophorus maculatus Species 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 230000002035 prolonged effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
Abstract
The electric corrosion prevention motor comprises a motor shaft, a housing, an end cover arranged on the left side of the housing and a left bearing hole arranged in the center of the end cover, wherein a right bearing hole is arranged in the center of the right side of the housing; the center of the rotor is provided with a connecting hole, and a motor shaft penetrates through the connecting hole; an anti-conduction gap is formed between the outer wall of the motor shaft and the inner wall of the connecting hole; the left end orifice of the connecting hole and the motor shaft, and the right end orifice of the connecting hole and the motor shaft are all fixed through insulating structures. The anti-electric corrosion motor can effectively prevent the rotor from directly transmitting current to the bearing through the motor shaft, has the effect of preventing electric corrosion, prevents the bearing from being influenced by the current on the rotor, and effectively prolongs the service life of the bearing.
Description
Technical Field
The invention relates to a motor, in particular to an electric corrosion prevention motor.
Background
The motor comprises a rotor, a stator sleeved outside the rotor and a shell arranged outside the stator, wherein the shell is fixed with the stator, the rotor drives a motor shaft to rotate when the motor runs, the motor shaft of the traditional motor is arranged in a connecting hole in the center of the rotor, and the motor shaft and the connecting hole are in interference fit, so that the motor shaft is in actual tight contact with the rotor.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provide an electric corrosion prevention motor which can effectively prevent a rotor from directly transmitting current to a bearing through a motor shaft, has the effect of preventing electric corrosion, ensures that the bearing is not influenced by the current on the rotor, and effectively prolongs the service life of the bearing.
The technical scheme adopted for solving the technical problems is as follows:
the invention discloses an electric corrosion prevention motor, which comprises a motor shaft, a machine shell, an end cover arranged on the left side of the machine shell and a left bearing hole arranged in the center of the end cover, wherein a right bearing hole is arranged in the center of the right side of the machine shell, the motor shaft is connected with the left bearing hole and the motor shaft is connected with the right bearing hole through bearings, and a stator fixed with the motor shaft is arranged on the inner wall of the machine shell, and the electric corrosion prevention motor is characterized in that: a rotor sleeved outside the motor shaft is arranged in the stator; the center of the rotor is provided with a connecting hole, and a motor shaft penetrates through the connecting hole; an anti-conduction gap is formed between the outer wall of the motor shaft and the inner wall of the connecting hole; the left end orifice of the connecting hole and the motor shaft, and the right end orifice of the connecting hole and the motor shaft are all fixed through insulating structures.
The insulation structure comprises shaft sleeves arranged at the left side and the right side of the rotor; the shaft sleeve consists of a plate-shaped part and a tubular part, the plate-shaped part and the tubular part are vertical to each other, a motor shaft penetrates through the tubular part, and the motor shaft and the tubular part are in interference fit; an annular insulating gasket is arranged between the platy part and the side wall of the rotor; the inner hole edge of the insulating gasket extends out of an insulating tube positioned between the outer wall of the tubular part and the inner wall of the connecting hole towards the inside of the connecting hole, and the insulating tube and the insulating gasket are integrally formed.
The surface of the rotor is provided with a rotor plastic coating which wraps the shaft sleeve; the rotor plastic-coated left side wall and the right side wall are provided with anti-contact holes in the centers, a motor shaft penetrates through the anti-contact holes, and the diameter of the anti-contact holes is larger than that of the motor shaft.
The shaft sleeve is made of metal.
The insulating gasket and the insulating tube are made of rubber.
An annular auxiliary groove is formed in the junction position of the insulating gasket and the insulating tube, and the auxiliary groove is opposite to the side wall of the rotor.
The beneficial effects of the invention are as follows:
compared with the prior art, the anti-electric corrosion motor adopting the structure has the advantages that the anti-electric corrosion motor is provided with the anti-electric conduction gap between the outer wall of the motor shaft and the inner wall of the connecting hole, so that the rotor cannot be in direct contact with the motor shaft, current generated by the rotor can be transmitted to the motor shaft only through air, and finally, the current transmitted to the motor shaft is extremely limited, and the ball in the bearing cannot be subjected to electric corrosion through the motor shaft, so that the situation that the ball of the bearing is worn due to electric corrosion is effectively avoided, the anti-electric corrosion effect is achieved, the service life of the bearing is prolonged, the concentricity of the bearing is guaranteed, the smooth effect can be achieved, and the service performance of the motor is guaranteed.
Drawings
FIG. 1 is a schematic view of the structure of an electric corrosion resistant motor of the present invention;
fig. 2 is an enlarged view of a portion a in fig. 1.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
referring to fig. 1 and 2, the invention provides an anti-electric corrosion motor, which comprises a motor shaft 1, a housing 2, an end cover 3 arranged on the left side of the housing 2 and a left bearing hole 4 arranged in the center of the end cover 3, wherein a right bearing hole 5 is arranged in the center of the right side of the housing 2, the motor shaft 1 and the left bearing hole 4 and the motor shaft 1 and the right bearing hole 5 are connected through a bearing 6, a stator 7 fixed with the motor shaft 1 is arranged on the inner wall of the housing 2, and a rotor 8 sleeved outside the motor shaft 1 is arranged in the stator 7; the center of the rotor 8 is provided with a connecting hole 9, and the motor shaft 1 passes through the connecting hole 9; an anti-conduction gap 10 is formed between the outer wall of the motor shaft 1 and the inner wall of the connecting hole 9; the left end orifice of the connecting hole 9 and the motor shaft 1, and the right end orifice of the connecting hole 9 and the motor shaft 1 are all fixed through insulating structures.
The insulation structure comprises shaft sleeves 11 arranged on the left side and the right side of the rotor 8; the shaft sleeve 11 is composed of a plate-shaped part 1101 and a tubular part 1102, the plate-shaped part 1101 and the tubular part 1102 are vertical to each other, the motor shaft 1 passes through the tubular part 1102, and the motor shaft 1 is in interference fit with the tubular part 1102; an annular insulating spacer 12 is arranged between the plate 1101 and the side wall of the rotor 8; the inner hole edge of the insulating gasket 12 extends towards the inside of the connecting hole 9 to form an insulating tube 13 between the outer wall of the tubular part 1102 and the inner wall of the connecting hole 9, and the insulating tube 13 and the insulating gasket 12 are integrally formed.
The surface of the rotor 8 is provided with a rotor plastic coating 14, and the rotor plastic coating 14 wraps the shaft sleeve 11; the centers of the side walls of the left side and the right side of the rotor plastic coated 14 are provided with anti-contact holes 15, the motor shaft 1 passes through the anti-contact holes 15, and the diameter of the anti-contact holes 15 is larger than that of the motor shaft 1.
The shaft sleeve 11 is made of metal.
The insulating spacer 12 and the insulating tube 13 are made of rubber.
An annular auxiliary groove 16 is arranged at the junction of the insulating gasket 12 and the insulating tube 13, and the auxiliary groove 16 is opposite to the side wall of the rotor 8.
The application method of the invention is as follows:
because the anti-electric conduction gap 10 is formed between the outer wall of the motor shaft 1 and the inner wall of the connecting hole 9, the rotor 8 cannot be in direct contact with the motor shaft 1, current generated by the rotor 8 can be transmitted to the motor shaft 1 only through air, and finally, the current transmitted to the motor shaft 1 is extremely limited, and cannot be subjected to electric corrosion on balls in the bearing 6 through the motor shaft 1, so that the condition that the balls of the bearing 6 are worn due to electric corrosion is effectively avoided, the anti-electric corrosion effect is achieved, the service life of the bearing 6 is prolonged, the concentricity of the bearing 6 is guaranteed, and the smooth effect can be achieved, and the service performance of the motor is guaranteed.
The existence of axle sleeve 11 can carry out fixed connection with motor shaft 1 and rotor 8, and insulating gasket 12 can separate the platy portion 1101 of rotor 8 lateral wall and axle sleeve 11, insulating tube 13 can separate connecting hole 9 inner wall and the tubular portion 1102 of axle sleeve 11, effectively stop rotor 8 and axle sleeve 11 direct contact, and insulating gasket 12 and insulating tube 13 all have insulating effect, can effectively avoid the electric current on the rotor 8 to pass through the condition that axle sleeve 11 passed on to motor shaft 1, guarantee that the electric current on the rotor 8 can only pass through the air in the anti-conduction clearance 10 and pass through, thereby effectively prevent the electric current on the rotor 8 to cause the influence to motor shaft 1.
The rotor 8 surface is equipped with rotor package and moulds 14, and rotor package is moulded 14 and is wrapped up in axle sleeve 11, and rotor package mould 14's existence can further be fixed axle sleeve 11 to effectively guarantee the steadiness when fixing through axle sleeve 11 between motor shaft 1 and the rotor 8, and rotor package mould 14 left and right sides lateral wall center and be equipped with and prevent contact hole 15, motor shaft 1 passes and prevents contact hole 15, prevents that contact hole 15 diameter is greater than motor shaft 1 diameter, prevents that contact hole 15's existence can avoid carrying out direct contact with motor shaft 1 when playing the steadiness effect.
When the shaft sleeve 11 is made of metal, the strength of the shaft sleeve 11 can be effectively ensured, so that the stability of the motor shaft 1 and the rotor 8 during fixation through the shaft sleeve 11 is ensured to the greatest extent.
When the insulating gasket 12 and the insulating tube 13 are made of rubber, the insulating gasket 12 and the insulating tube 13 can achieve an excellent insulating effect, an annular auxiliary groove 16 is formed in the boundary position between the insulating gasket 12 and the insulating tube 13, the auxiliary groove 16 is opposite to the side wall of the rotor 8, the insulating gasket 12 and the insulating tube 13 can be further deformed when being extruded towards the direction of the rotor 8 under the action of the shaft sleeve 11, the insulating gasket 12 is further attached to the side wall of the rotor 8, and the insulating tube 13 is further attached to the inner wall of the connecting hole 9, so that the insulating effect is further improved.
Claims (5)
1. The utility model provides an electric corrosion prevention motor, includes motor shaft, casing, locates the left end cover of casing and locates the left bearing hole at end cover center, and casing right side center is equipped with right bearing hole, all is connected through the bearing between motor shaft and the left bearing hole, between motor shaft and the right bearing hole, and the casing inner wall is equipped with the stator rather than fixed, its characterized in that: a rotor sleeved outside the motor shaft is arranged in the stator; the center of the rotor is provided with a connecting hole, and a motor shaft penetrates through the connecting hole; an anti-conduction gap is formed between the outer wall of the motor shaft and the inner wall of the connecting hole; the left end orifice of the connecting hole and the motor shaft, and the right end orifice of the connecting hole and the motor shaft are all fixed through an insulating structure;
the insulation structure comprises shaft sleeves arranged at the left side and the right side of the rotor; the shaft sleeve consists of a plate-shaped part and a tubular part, the plate-shaped part and the tubular part are vertical to each other, a motor shaft penetrates through the tubular part, and the motor shaft and the tubular part are in interference fit; an annular insulating gasket is arranged between the platy part and the side wall of the rotor; the inner hole edge of the insulating gasket extends out of an insulating tube positioned between the outer wall of the tubular part and the inner wall of the connecting hole towards the inside of the connecting hole, and the insulating tube and the insulating gasket are integrally formed.
2. An electric corrosion resistant motor as set forth in claim 1 wherein: the surface of the rotor is provided with a rotor plastic coating which wraps the shaft sleeve; the rotor plastic-coated left side wall and the right side wall are provided with anti-contact holes in the centers, a motor shaft penetrates through the anti-contact holes, and the diameter of the anti-contact holes is larger than that of the motor shaft.
3. An electric corrosion resistant motor as set forth in claim 1 wherein: the shaft sleeve is made of metal.
4. An electric corrosion resistant motor as set forth in claim 1 wherein: the insulating gasket and the insulating tube are made of rubber.
5. An electric corrosion resistant motor as set forth in claim 4 wherein: an annular auxiliary groove is formed in the junction position of the insulating gasket and the insulating tube, and the auxiliary groove is opposite to the side wall of the rotor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210295651.2A CN114465401B (en) | 2022-03-24 | 2022-03-24 | Electric corrosion prevention motor |
| PCT/CN2022/124855 WO2023178995A1 (en) | 2022-03-24 | 2022-10-12 | Anti-electrocorrosion electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210295651.2A CN114465401B (en) | 2022-03-24 | 2022-03-24 | Electric corrosion prevention motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114465401A CN114465401A (en) | 2022-05-10 |
| CN114465401B true CN114465401B (en) | 2023-12-22 |
Family
ID=81416930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210295651.2A Active CN114465401B (en) | 2022-03-24 | 2022-03-24 | Electric corrosion prevention motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114465401B (en) |
| WO (1) | WO2023178995A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114465401B (en) * | 2022-03-24 | 2023-12-22 | 浙江亿利达风机股份有限公司 | Electric corrosion prevention motor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1075551A (en) * | 1996-08-29 | 1998-03-17 | Nippon Seiko Kk | Motor for driving fan |
| JP2005198374A (en) * | 2004-01-05 | 2005-07-21 | Mitsubishi Electric Corp | Dynamo-electric machine |
| KR20090111403A (en) * | 2008-04-22 | 2009-10-27 | 주식회사 석문이엔지 | BLDC Motor Structure for Electrolytic Corrosion Protection of Bearing |
| KR101667289B1 (en) * | 2015-06-05 | 2016-10-20 | 주식회사 오양공조기 | Bldc mortor shaft structure of ball bearing preventing electric corrosion |
| WO2018179831A1 (en) * | 2017-03-31 | 2018-10-04 | 日本電産テクノモータ株式会社 | Motor |
| CN214506787U (en) * | 2021-01-15 | 2021-10-26 | 华为技术有限公司 | Motor shaft, motor and electric motor car |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008278647A (en) * | 2007-04-27 | 2008-11-13 | Asmo Co Ltd | Rotor and motor |
| JP5594284B2 (en) * | 2009-02-26 | 2014-09-24 | パナソニック株式会社 | Electric motor and electric device including the same |
| CN209881549U (en) * | 2019-07-17 | 2019-12-31 | 江苏雷利电机股份有限公司 | Motor and shaft current isolation structure thereof |
| CN210958063U (en) * | 2019-12-31 | 2020-07-07 | 内蒙古巨创电气设备有限公司 | Insulation protection device for bearing of wind driven generator |
| CN114465401B (en) * | 2022-03-24 | 2023-12-22 | 浙江亿利达风机股份有限公司 | Electric corrosion prevention motor |
-
2022
- 2022-03-24 CN CN202210295651.2A patent/CN114465401B/en active Active
- 2022-10-12 WO PCT/CN2022/124855 patent/WO2023178995A1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1075551A (en) * | 1996-08-29 | 1998-03-17 | Nippon Seiko Kk | Motor for driving fan |
| JP2005198374A (en) * | 2004-01-05 | 2005-07-21 | Mitsubishi Electric Corp | Dynamo-electric machine |
| KR20090111403A (en) * | 2008-04-22 | 2009-10-27 | 주식회사 석문이엔지 | BLDC Motor Structure for Electrolytic Corrosion Protection of Bearing |
| KR101667289B1 (en) * | 2015-06-05 | 2016-10-20 | 주식회사 오양공조기 | Bldc mortor shaft structure of ball bearing preventing electric corrosion |
| WO2018179831A1 (en) * | 2017-03-31 | 2018-10-04 | 日本電産テクノモータ株式会社 | Motor |
| CN214506787U (en) * | 2021-01-15 | 2021-10-26 | 华为技术有限公司 | Motor shaft, motor and electric motor car |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023178995A1 (en) | 2023-09-28 |
| CN114465401A (en) | 2022-05-10 |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| GR01 | Patent grant |