CN203859618U - Bearing - Google Patents
Bearing Download PDFInfo
- Publication number
- CN203859618U CN203859618U CN201420191658.0U CN201420191658U CN203859618U CN 203859618 U CN203859618 U CN 203859618U CN 201420191658 U CN201420191658 U CN 201420191658U CN 203859618 U CN203859618 U CN 203859618U
- Authority
- CN
- China
- Prior art keywords
- outer ring
- inner ring
- bearing
- raceway
- ring raceway
- 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
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- 230000004888 barrier function Effects 0.000 claims description 14
- 239000004809 Teflon Substances 0.000 claims description 5
- 229920006362 Teflon® Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000003628 erosive effect Effects 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
The utility model relates to a bearing, which comprises an outer ring and an inner ring. The inner ring surface of the outer ring is provided with an outer ring raceway; the outer ring surface of the inner ring is provided with an inner ring raceway; and a rolling body and a holding frame for mounting the rolling body are arranged between the outer ring raceway and the inner ring raceway. The bearing is characterized in that at least one raceway of the outer ring raceway and the inner ring raceway is coated with an insulated layer. By adopting the above technical scheme, electric erosion damage can be effectively avoided, the service life of the bearing and reliability of the motor and the mechanical device can be significantly improved, and the cost is low.
Description
Technical field
The utility model relates to a kind of bearing.
Background technology
Motor is in prior art application, especially variable-frequency motor or large and middle size motor, because of the factor of design of electrical motor and manufacture view, rotor easily produces higher shaft voltage in running, by forming current circuit between the electric machine main shaft, bearing, housing and the support that are in contact with one another.This shaft current becomes the major part of motor reactive loss, the more important thing is when shaft current is passed through bearing inside, puncture oil film and send electric spark, make the melting of bearing race surface local produce convex-concave damage, it is galvanic corrosion damage, also can accelerate bearing grease deteriorated, this all will sharply reduce bearing life, thus the safety and reliability of serious threat motor and plant equipment.
Prevent that galvanic corrosion from occurring, will destroy the current circuit on motor, at present, for galvanic corrosion damage, mainly contain following several settling mode: (1) arranges earthing device on axle or housing, this is an effective method, but major applications occasion limited space, is unsuitable for arranging earthing device; (2) insulation spacer is set on bearing chamber, axle or electric machine casing, this method inevitably will relate to assembly precision problem, will have a strong impact on motor running accuracy and mechanical smoothness of operation; (3) adopt insulation bearing, for example ceramic bearing, but the relative plain bearing of this bearing, prices are rather stiff, and cost is not that general industry application can bear.
Summary of the invention
The purpose of this utility model: in order to overcome the defect of prior art, the utility model provides a kind of bearing, can effectively avoid galvanic corrosion damage, thereby significantly improves the reliability of bearing useful life and motor and plant equipment; And cost is low.
The technical solution of the utility model: a kind of bearing, include outer ring, inner ring, the inner ring face of described outer ring is provided with outer ring raceway, the outer ring face of described inner ring is provided with inner ring raceway, between described outer ring raceway, inner ring raceway, be provided with rolling element, for the retainer of rolling element is installed, it is characterized in that: in described outer ring raceway, one of them raceway of inner ring raceway, be coated with insulating barrier.
Adopt technique scheme, by be coated with insulating barrier in one of them raceway of outer ring raceway, inner ring raceway, the shaft voltage that rotor produces in running, between electric machine main shaft, bearing, housing and support, cannot form current circuit, can effectively avoid bearing galvanic corrosion damage, thereby significantly improve the reliability of bearing useful life and motor and plant equipment; And cost is low.
Further setting of the present utility model: be all coated with insulating barrier in described outer ring raceway, inner ring raceway.
Adopt above-mentioned further setting, can further improve the insulation property of bearing, further avoid bearing galvanic corrosion damage, thereby further significantly improve the reliability of bearing useful life and motor and plant equipment.
Of the present utility modelly further arrange again: on the inner ring face of described outer ring, be positioned at and on the outer ring face of outer ring raceway Outboard Sections and inner ring, be positioned at inner ring raceway Outboard Sections and be also coated with insulating barrier.
Adopt above-mentioned further setting again, can further improve again the insulation property of bearing, thereby can further avoid bearing galvanic corrosion damage.
Further setting more of the present utility model: described insulating barrier is that Teflon material is made.
Adopt above-mentioned further setting again: the insulating barrier that Teflon material is made, its good insulation preformance, and also its coefficient of friction is low, thus can ensure that the service behaviour of bearing is not affected.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model specific embodiment.
Embodiment
As shown in Figure 1, a kind of bearing, include outer ring 1, inner ring 2, the inner ring face of described outer ring 1 is provided with outer ring raceway 11, the outer ring face of described inner ring 2 is provided with inner ring raceway 21, described outer ring raceway 11, between inner ring raceway 21, be provided with rolling element 3, for the retainer 4 of rolling element 3 is installed, described outer ring raceway 11, the interior insulating barrier 5 that is all coated with of inner ring raceway 21, in the utility model specific embodiment, on the inner ring face of described outer ring 1, be positioned at and on the outer ring face of outer ring raceway 11 Outboard Sections 12 and inner ring 2, be positioned at inner ring raceway 21 Outboard Sections 22 and be also coated with insulating barrier 5.By the insulating barrier being coated with in outer ring raceway 11, inner ring raceway 21, the shaft voltage that rotor produces in running, between electric machine main shaft, bearing, housing and support, cannot form current circuit, can effectively avoid bearing galvanic corrosion damage, thereby significantly improve the reliability of bearing useful life and motor and plant equipment; And cost is low.
In the utility model specific embodiment, described insulating barrier 5 is made for Teflon material.The insulating barrier 5 that Teflon material is made, its good insulation preformance, and also its coefficient of friction is low, thus can ensure that the service behaviour of bearing is not affected.
Claims (2)
1. a bearing, include outer ring, inner ring, the inner ring face of described outer ring is provided with outer ring raceway, the outer ring face of described inner ring is provided with inner ring raceway, between described outer ring raceway, inner ring raceway, be provided with rolling element, for the retainer of rolling element is installed, it is characterized in that: in described outer ring raceway, inner ring raceway, be all coated with insulating barrier, on the inner ring face of described outer ring, be positioned at and on the outer ring face of outer ring raceway Outboard Sections and inner ring, be positioned at inner ring raceway Outboard Sections and be also coated with insulating barrier.
2. bearing according to claim 1, is characterized in that: described insulating barrier is that Teflon material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191658.0U CN203859618U (en) | 2014-04-18 | 2014-04-18 | Bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191658.0U CN203859618U (en) | 2014-04-18 | 2014-04-18 | Bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203859618U true CN203859618U (en) | 2014-10-01 |
Family
ID=51609455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420191658.0U Expired - Fee Related CN203859618U (en) | 2014-04-18 | 2014-04-18 | Bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203859618U (en) |
-
2014
- 2014-04-18 CN CN201420191658.0U patent/CN203859618U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9790995B2 (en) | Bearing seal with integrated grounding brush | |
| EP1967288A3 (en) | Rotor and stator assemblies that utilize magnetic bearings for use in corrosive environments | |
| CN105703548B (en) | Motor with electric potential balancing device | |
| EP3048340B1 (en) | Sealing arrangement | |
| US20130301971A1 (en) | Closure design of a conductive rubber material for allowing current passage through a bearing in electric machines | |
| JP4894493B2 (en) | Insulation ring and rotating electric machine | |
| EP2955395B1 (en) | Electrically conductive bearing system and manufacturing method | |
| CN202127314U (en) | Insulation end cover of wind driven generators | |
| CN102780303A (en) | Motor shaft sealing structure with high protection grade | |
| CN101908785A (en) | Motor | |
| WO2016155723A3 (en) | Drive unit, particularly a transmission actuator | |
| CN201266860Y (en) | Insulated end cap for motor | |
| JP2008045697A (en) | Rotational driving force transmission device | |
| CN102723802A (en) | Novel end cover insulation structure of wind power generator | |
| CN200973040Y (en) | Insulation bearing sleeve for motor | |
| CN203859618U (en) | Bearing | |
| CN201388100Y (en) | Motor bearing seat insulation structure | |
| JP2012191734A (en) | Motor | |
| EP2607727A1 (en) | Pivot linkage device with bearings comprising means for protection against high voltage transients | |
| KR20150068987A (en) | Bearing lubricated with a medium | |
| US20150357869A1 (en) | Rotor of rotary electric machine | |
| CN101325351A (en) | Coining motor | |
| CN202282695U (en) | Wind power slip ring | |
| CN204290570U (en) | A kind of rotary seal structure of new-energy automobile drive motors | |
| CN101521426A (en) | Shaft current prevention device for large and medium-sized motor bearing and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Bearing device Effective date of registration: 20171221 Granted publication date: 20141001 Pledgee: Agricultural Bank of China branch of Wenzhou economic and Technological Development Zone, Limited by Share Ltd. Pledgor: WENZHOU C&U AUTO BEARING CO.,LTD. Registration number: 2017330000316 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20201221 Granted publication date: 20141001 Pledgee: Agricultural Bank of China branch of Wenzhou economic and Technological Development Zone, Limited by Share Ltd. Pledgor: WENZHOU C&U AUTO BEARING Co.,Ltd. Registration number: 2017330000316 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |