CN201854126U - Bearing insulation device of variable-frequency motor - Google Patents
Bearing insulation device of variable-frequency motor Download PDFInfo
- Publication number
- CN201854126U CN201854126U CN2010206016496U CN201020601649U CN201854126U CN 201854126 U CN201854126 U CN 201854126U CN 2010206016496 U CN2010206016496 U CN 2010206016496U CN 201020601649 U CN201020601649 U CN 201020601649U CN 201854126 U CN201854126 U CN 201854126U
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- CN
- China
- Prior art keywords
- bearing
- cover
- outer ring
- variable
- insulation
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- 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
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Abstract
The utility model relates to a bearing insulation device of a variable-frequency motor, comprising a bearing inner cover, a bearing, a motor end cover and a bearing outer cover, wherein a bearing inner ring is arranged on a rotor shaft; the bearing inner cover and the bearing outer cover are respectively arranged at two ends of the bearing; and the bearing inner cover, the bearing outer cover and the motor end cover are connected through connection bolts. The bearing insulation device of the variable-frequency motor is characterized in that an insulation sleeve is arranged between a bearing outer ring and a bearing chamber of the motor end cover; the insulation sleeve is arranged in the motor end cover; the bearing outer ring is arranged in the insulation sleeve; the insulation sleeve consists of an outer ring, an inner ring and a middle body; and the middle body is arranged between the outer ring and the inner ring. Through the utility model, shaft current can form backflow without passing through the bearing so that the motor bearing is protected. By means of the device, the whole outer ring of the bearing is in an insulation protective state so that the backflow of the shaft current is avoided so as to protect the motor. The device has the characteristics of being good in insulation effect, convenient for changing and disassembly, cost-saving, and practical and reliable.
Description
Technical field
The utility model relates to a kind of bearing insulation device of variable-frequency motor, belongs to the machine components of variable-frequency motor.
Background technology
Along with the continuous development of China's industry and the continuous expansion of science and technology, variable-frequency motor is used more and more widely in industrial production and developing every field.As everyone knows, variable-frequency motor is bound to use frequency converter, and frequency converter is because its operating characteristic can produce two harm greatly to variable-frequency motor: the one, and the insulation of harmonic wave harm motor windings; The 2nd, shaft current harm bearing damages motor; The bad problem of cooling effect when variable-frequency motor also will solve low frequency in addition; These factors all will make motor lose efficacy or damage.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, thereby a kind of bearing insulation device of variable-frequency motor is provided, and this bearing insulation device replaces using insulation bearing, shaft current is not formed by bearing reflux, thereby eliminate the injury of shaft current to bearing.
The technical scheme that provides according to the utility model, a kind of bearing insulation device of variable-frequency motor comprises internal bearing cover, bearing, electric motor end cap, bearing end cover, described bearing inner race is contained on the armature spindle, the bearing two ends are adorned internal bearing cover and bearing end cover respectively, internal bearing cover, bearing end cover are connected by connecting bolt with electric motor end cap, feature is: between described bearing outer ring and electric motor end cap bearing chamber insulating case is installed, insulating case is contained in the electric motor end cap, and bearing outer ring is contained in the insulating case.
Described insulating case is made up of outer ring, inner ring and intermediate, is provided with intermediate in the middle of outer ring and inner ring.Inner ring and outer ring are respectively steel material, and intermediate is that insulating material is made, like this between bearing outer ring and the end cap bearing chamber, formed an insulation protection between bearing one end face and the bearing end cover.The insulation of internal bearing cover realizes by inlay a dead ring in internal bearing cover.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; An insulating case is installed in employing between bearing outer ring and electric motor end cap bearing chamber, shaft current is not formed by bearing reflux, thereby play the effect of protecting motor bearings.This device is in the insulation protection state the whole outer ring of bearing, the generation of having avoided shaft current to reflux, thereby protection motor.The characteristics of this seal are: insulation effect is good, change and tear open conveniently, and cost savings are practical reliable.
Description of drawings
Fig. 1 is the utility model structural representation cutaway view.
Fig. 2 is the utility model airframe bearing inner cap seal structural representation cutaway view.
Fig. 3 is an insulating case structural representation cutaway view of the present utility model.
Embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
As shown in Figure 1, comprise internal bearing cover 1, bearing 2, insulating case 3, electric motor end cap 4, connecting bolt 5, bearing end cover 6 and armature spindle 7.
Bearing 2 inner rings described in the utility model are contained on the armature spindle 7, insulating case 3 is installed between bearing 2 outer rings and electric motor end cap 4 bearing chambers, insulating case 3 is contained in the electric motor end cap 4, bearing 2 outer rings are contained in the insulating case 3, bearing 2 two ends are adorned internal bearing cover 1 and bearing end cover 6 respectively, and internal bearing cover 1, bearing end cover 6 are connected by connecting bolt 5 with electric motor end cap 4.
Described insulating case 3 is made up of outer ring 3-1, inner ring 3-2 and intermediate 3-3, is provided with intermediate 3-3 in the middle of outer ring 3-1 and inner ring 3-2.Inner ring 3-2 and outer ring 3-1 are respectively steel material, and intermediate 3-3 is that insulating material is made, like this between bearing outer ring and the end cap bearing chamber, formed an insulation protection between bearing one end face and the bearing end cover.The insulation of internal bearing cover 1 realizes by inlay a dead ring 1-1 in internal bearing cover 1.
The bearing insulation device of the utility model variable-frequency motor is that an insulating case is installed between bearing outer ring and electric motor end cap bearing chamber, shaft current is not formed by bearing reflux, thereby play the effect of protecting motor bearings.The bearing outer ring of variable-frequency motor normally contacts with electric motor end cap bearing chamber matched in clearance, the bearing inner race interference fit is contained in the rotating shaft, the both ends of the surface of bearing are equipped with a bearing end cover and an internal bearing cover, and the bearing exterior and interior cover is used for fixing the bearing axial location, avoids the bearing axial motion.Reflux for avoiding the variable-frequency motor shaft current to form by bearing exterior and interior cover, end cap, support; one insulating case is installed between bearing outer ring and electric motor end cap bearing chamber; this insulating case is made up of outer ring, inner ring and intermediate; between bearing outer ring and the end cap bearing chamber, formed an insulation protection between bearing one end face and the bearing end cover, the insulation of internal bearing cover realizes by inlay a dead ring in internal bearing cover like this.This device is in the insulation protection state the whole outer ring of bearing, the generation of having avoided shaft current to reflux, thereby protection motor.
Claims (5)
1. the bearing insulation device of a variable-frequency motor, comprise internal bearing cover (1), bearing (2), electric motor end cap (4), bearing end cover (6), described bearing (2) inner ring is contained on the armature spindle (7), bearing (2) two ends are adorned internal bearing cover (1) and bearing end cover (6) respectively, internal bearing cover (1), bearing end cover (6) is connected by connecting bolt (5) with electric motor end cap (4), it is characterized in that: between described bearing (2) outer ring and electric motor end cap (4) bearing chamber, insulating case (3) is installed, insulating case (3) is contained in the electric motor end cap (4), and bearing (2) outer ring is contained in the insulating case (3).
2. the bearing insulation device of a kind of variable-frequency motor according to claim 1, it is characterized in that described insulating case (3) is made up of outer ring (3-1), inner ring (3-2) and intermediate (3-3), be provided with intermediate (3-3) in the middle of (3-1) and the inner ring (3-2) in the outer ring.
3. the bearing insulation device of a kind of variable-frequency motor according to claim 2 is characterized in that described inner ring (3-2) and outer ring (3-1) are respectively steel material and make.
4. the bearing insulation device of a kind of variable-frequency motor according to claim 2 is characterized in that described intermediate (3-3) makes for insulating material.
5. the bearing insulation device of a kind of variable-frequency motor according to claim 1 is characterized in that inlaying in the described internal bearing cover (1) dead ring (1-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206016496U CN201854126U (en) | 2010-11-11 | 2010-11-11 | Bearing insulation device of variable-frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206016496U CN201854126U (en) | 2010-11-11 | 2010-11-11 | Bearing insulation device of variable-frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201854126U true CN201854126U (en) | 2011-06-01 |
Family
ID=44096506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206016496U Expired - Fee Related CN201854126U (en) | 2010-11-11 | 2010-11-11 | Bearing insulation device of variable-frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201854126U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857014A (en) * | 2012-09-17 | 2013-01-02 | 西安正麒电气有限公司 | Motor insulation bearing chamber |
| CN103457392A (en) * | 2013-09-09 | 2013-12-18 | 中达电机股份有限公司 | Bearing structure capable of removing shaft currents |
| CN103475140A (en) * | 2013-09-22 | 2013-12-25 | 首钢京唐钢铁联合有限责任公司 | Self-short-circuit insulated bearing |
| WO2022088438A1 (en) * | 2020-10-29 | 2022-05-05 | 中车株洲电机有限公司 | Mining dump truck with electric wheels, and traction electric motor thereof |
-
2010
- 2010-11-11 CN CN2010206016496U patent/CN201854126U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102857014A (en) * | 2012-09-17 | 2013-01-02 | 西安正麒电气有限公司 | Motor insulation bearing chamber |
| CN103457392A (en) * | 2013-09-09 | 2013-12-18 | 中达电机股份有限公司 | Bearing structure capable of removing shaft currents |
| CN103475140A (en) * | 2013-09-22 | 2013-12-25 | 首钢京唐钢铁联合有限责任公司 | Self-short-circuit insulated bearing |
| CN103475140B (en) * | 2013-09-22 | 2015-11-25 | 首钢京唐钢铁联合有限责任公司 | A kind of from short circuit insulation bearing |
| WO2022088438A1 (en) * | 2020-10-29 | 2022-05-05 | 中车株洲电机有限公司 | Mining dump truck with electric wheels, and traction electric motor thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20121111 |