CN103457392A - Bearing structure capable of removing shaft currents - Google Patents
Bearing structure capable of removing shaft currents Download PDFInfo
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- CN103457392A CN103457392A CN2013104074071A CN201310407407A CN103457392A CN 103457392 A CN103457392 A CN 103457392A CN 2013104074071 A CN2013104074071 A CN 2013104074071A CN 201310407407 A CN201310407407 A CN 201310407407A CN 103457392 A CN103457392 A CN 103457392A
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- bearing
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- motor shaft
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Abstract
The invention relates to a bearing structure capable of removing shaft currents. A bearing is installed on a motor shaft, a bearing inner cover is installed on the motor shaft of the inner side of the bearing, and a bearing outer cover is installed on the outer side of the bearing. An end cover is connected outside the outer circle of the outer ring of the bearing in a sleeved mode, and the bearing inner cover, the end cover and the bearing outer cover are integrally fastened through bolts. An elastic retaining ring is installed on a motor shaft of the outer side of the bearing, and an oil thrower is installed on the motor shaft between the elastic retaining ring and the bearing. A first insulating pad is arranged between the outer end face of the outer ring of the bearing and the inner end face of the bearing outer cover, and a second insulating pad is arranged between the inner end face of the outer ring of the bearing and the outer end face of the bearing inner cover. A bearing sleeve is arranged between the outer circle of the outer ring of the bearing and the inner circle of the end cover. The bearing structure capable of removing the shaft currents is simple, compact and reasonable in structure. A circuit cannot be formed between a rotor and the end cover, the shaft currents generated by a frequency converter on a motor are effectively eliminated, the bearing is prevented from being damaged, and therefore the motor is protected.
Description
Technical field
The present invention relates to a kind of motor bearings structure, the especially a kind of bearing arrangement that can eliminate shaft current.
Background technology
Nowadays low-carbon environment-friendly awareness of saving energy is more and more denseer, and frequency converter uses more and more extensive at machine field.The use of frequency converter can make motor start under low frequency and low-voltage, when having overcome heavy-duty motor and having started to the impact of line voltage; Frequency converter also can make motor long-time running under low frequency and low-voltage, thereby has reduced energy consumption.Yet frequency converter is owing to can producing a lot of harmonic waves in use procedure, and particularly a little high order odd harmonics can produce induced current (being commonly referred to shaft current) to the loop formed by support, bearing and rotor.Shaft current can puncture the oil film between bearing and produce electric discharge, will make in the course of time the oil of lubricating grease deteriorated gradually, when serious, can make bearing burn out, and causes the parking accident.Eliminate shaft current, existing method adopts insulation bearing mostly, but, because insulation bearing is expensive, the manufacturing cycle is long, so that motor product does not have the competitiveness of price.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, thereby provide a kind of, can effectively eliminate the bearing arrangement that can eliminate shaft current of shaft current so that form to open circuit between bearing and end cap.
According to technical scheme provided by the invention, the described bearing arrangement that can eliminate shaft current, bearing is installed on motor shaft, on the motor shaft of bearing inboard, internal bearing cover is installed, in the bearing outside, bearing end cover is installed, in the outer ring of bearing, the cylindrical outer cover is connected to end cap, internal bearing cover, end cap and bearing end cover are by the bolted one, on the motor shaft in the bearing outside, circlip is installed, on the motor shaft between circlip and bearing, disc is installed, the inner ring outer face of the inner face of disc and bearing offsets, the outer face of disc and the inner face of circlip offset, be provided with the first insulation cushion between the inner face of the outer face, outer ring of bearing and bearing end cover, be provided with the second insulation cushion between the outer face of the outer ring of bearing inner face and internal bearing cover, be provided with bearing holder (housing, cover) between the inner circle of the outer ring of bearing cylindrical and end cap.
The wall thickness of described insulating case is 0.2 ~ 0.35mm.
The wall thickness of described bearing holder (housing, cover) is 4 ~ 8mm.
The thickness of described the first insulation cushion is 1.0 ~ 1.5mm.
The thickness of described the second insulation cushion is 1.0 ~ 1.5mm.
The present invention is simple, compact and reasonable for structure; The present invention makes not become loop between rotor and end cap, has effectively eliminated frequency converter motor is produced to shaft current, has avoided bearing damage, thus the protection motor; The present invention is not only with low cost, successful, but also reduced later maintenance cost.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
This can eliminate the bearing arrangement of shaft current, bearing 8 is installed on motor shaft, internal bearing cover 6 is installed on the motor shaft of bearing 8 inboards, in bearing 8 outsides, bearing end cover 5 is installed, in the outer ring of bearing 8, the cylindrical outer cover is connected to end cap 1, internal bearing cover 6, end cap 1 passes through the bolted one with bearing end cover 5, circlip 9 is installed on the motor shaft in bearing 8 outsides, on the motor shaft between circlip 9 and bearing 8, disc 10 is installed, the inner ring outer face of the inner face of disc 10 and bearing 8 offsets, the inner face of the outer face of disc 10 and circlip 9 offsets, be provided with the first insulation cushion 4 between the inner face of the outer face, outer ring of bearing 8 and bearing end cover 5, be provided with the second insulation cushion 7 between the outer face of the outer ring of bearing 8 inner face and internal bearing cover 6, be provided with bearing holder (housing, cover) 3 between the inner circle of the outer ring of bearing 8 cylindrical and end cap 1.
The wall thickness of described insulating case 2 is 0.2 ~ 0.35mm.
The wall thickness of described bearing holder (housing, cover) 3 is 4 ~ 8mm.
The thickness of described the first insulation cushion 4 is 1.0 ~ 1.5mm.
The thickness of described the second insulation cushion 7 is 1.0 ~ 1.5mm.
During manufacture, at first end cap 1 is heated to certain temperature, insulating material is rolled on bearing holder (housing, cover) 3 uniformly, form insulating case 2, bearing holder (housing, cover) 3 is installed in the bearing chamber of end cap 1 to gap filling fluid sealant between bearing holder (housing, cover) 3 and bearing chamber, again end cap 1 integral body is carried out to fine finishining, the complete car of seam that bearing holder (housing, cover) 3 is coordinated with end cap 1 falls, and like this, between bearing holder (housing, cover) 3 and end cap 1, has formed insulation.
Put a slice the second insulation cushion 7 between internal bearing cover 6 and bearing 8, the outer face of the inner face of the second insulation cushion 7 and internal bearing cover 6 offsets, the outer ring inner face of the outer face of the second insulation cushion 7 and bearing 8 offsets, also put a slice the first insulation cushion 4 between bearing end cover 5 and bearing 8, the outer face, outer ring of the inner face of the first insulation cushion 4 and bearing 8 offsets, the inner face of the outer face of the first insulation cushion 4 and bearing end cover 5 offsets, like this, bearing 8 all has been spaced with extraneous conductor, thereby reach support, end cap 1, bearing 8, form the purpose opened circuit between rotor, eliminated up hill and dale shaft current.
Claims (5)
1. the bearing arrangement that can eliminate shaft current, bearing (8) is installed on motor shaft, on the motor shaft of bearing (8) inboard, internal bearing cover (6) is installed, in bearing (8) outside, bearing end cover (5) is installed, in the outer ring of bearing (8), the cylindrical outer cover is connected to end cap (1), internal bearing cover (6), end cap (1) passes through the bolted one with bearing end cover (5), on the motor shaft in bearing (8) outside, circlip (9) is installed, on the motor shaft between circlip (9) and bearing (8), disc (10) is installed, the inner ring outer face of the inner face of disc (10) and bearing (8) offsets, the inner face of the outer face of disc (10) and circlip (9) offsets, it is characterized in that: between the inner face of the outer face, outer ring of bearing (8) and bearing end cover (5), be provided with the first insulation cushion (4), be provided with ear insulation cushion (7) between the outer face of the outer ring inner face of bearing (8) and internal bearing cover (6), be provided with bearing holder (housing, cover) (3) between the inner circle of the outer ring cylindrical of bearing (8) and end cap (1).
2. the bearing arrangement that can eliminate shaft current as claimed in claim 1, it is characterized in that: the wall thickness of described insulating case (2) is 0.2 ~ 0.35mm.
3. the bearing arrangement that can eliminate shaft current as claimed in claim 1, it is characterized in that: the wall thickness of described bearing holder (housing, cover) (3) is 4 ~ 8mm.
4. the bearing arrangement that can eliminate shaft current as claimed in claim 1, it is characterized in that: the thickness of described the first insulation cushion (4) is 1.0 ~ 1.5mm.
5. the bearing arrangement that can eliminate shaft current as claimed in claim 1, it is characterized in that: the thickness of described the second insulation cushion (7) is 1.0 ~ 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104074071A CN103457392A (en) | 2013-09-09 | 2013-09-09 | Bearing structure capable of removing shaft currents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104074071A CN103457392A (en) | 2013-09-09 | 2013-09-09 | Bearing structure capable of removing shaft currents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103457392A true CN103457392A (en) | 2013-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013104074071A Pending CN103457392A (en) | 2013-09-09 | 2013-09-09 | Bearing structure capable of removing shaft currents |
Country Status (1)
| Country | Link |
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| CN (1) | CN103457392A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425651A (en) * | 2017-07-26 | 2017-12-01 | 卧龙电气集团股份有限公司 | Make the novel bearing insulation system and its manufacture method of insulating barrier using BMC |
| CN110120723A (en) * | 2019-04-30 | 2019-08-13 | 中汽研汽车检验中心（天津）有限公司 | A kind of new-energy automobile power drive system motor axial direction electromagnetic disturbance cancellation element |
| CN111509892B (en) * | 2020-04-20 | 2021-09-21 | 青岛中加特电气股份有限公司 | End cover structure of motor bearing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692590A (en) * | 2009-08-10 | 2010-04-07 | 南阳防爆集团股份有限公司 | Motor insulating bearing device and manufacturing method thereof |
| CN201854126U (en) * | 2010-11-11 | 2011-06-01 | 无锡市中达电机有限公司 | Bearing insulation device of variable-frequency motor |
| CN202121421U (en) * | 2011-06-27 | 2012-01-18 | 上海宝钢设备检修有限公司 | Insulating bearing pedestal structure for preventing shaft current |
| CN202127314U (en) * | 2011-06-29 | 2012-01-25 | 湘潭市兴盛液压机械制造有限公司 | Insulation end cover of wind driven generators |
| CN103023190A (en) * | 2012-12-17 | 2013-04-03 | 浙江金龙电机股份有限公司 | High-power variable frequency motor insulation bearing sleeve |
| CN203434783U (en) * | 2013-09-09 | 2014-02-12 | 中达电机股份有限公司 | Bearing structure capable of eliminating shaft current |
-
2013
- 2013-09-09 CN CN2013104074071A patent/CN103457392A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692590A (en) * | 2009-08-10 | 2010-04-07 | 南阳防爆集团股份有限公司 | Motor insulating bearing device and manufacturing method thereof |
| CN201854126U (en) * | 2010-11-11 | 2011-06-01 | 无锡市中达电机有限公司 | Bearing insulation device of variable-frequency motor |
| CN202121421U (en) * | 2011-06-27 | 2012-01-18 | 上海宝钢设备检修有限公司 | Insulating bearing pedestal structure for preventing shaft current |
| CN202127314U (en) * | 2011-06-29 | 2012-01-25 | 湘潭市兴盛液压机械制造有限公司 | Insulation end cover of wind driven generators |
| CN103023190A (en) * | 2012-12-17 | 2013-04-03 | 浙江金龙电机股份有限公司 | High-power variable frequency motor insulation bearing sleeve |
| CN203434783U (en) * | 2013-09-09 | 2014-02-12 | 中达电机股份有限公司 | Bearing structure capable of eliminating shaft current |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425651A (en) * | 2017-07-26 | 2017-12-01 | 卧龙电气集团股份有限公司 | Make the novel bearing insulation system and its manufacture method of insulating barrier using BMC |
| CN110120723A (en) * | 2019-04-30 | 2019-08-13 | 中汽研汽车检验中心（天津）有限公司 | A kind of new-energy automobile power drive system motor axial direction electromagnetic disturbance cancellation element |
| CN111509892B (en) * | 2020-04-20 | 2021-09-21 | 青岛中加特电气股份有限公司 | End cover structure of motor bearing |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131218 |