CN201323490Y - Bearing insulation structure capable of preventing bearing from being damaged by shaft electrical current - Google Patents
Bearing insulation structure capable of preventing bearing from being damaged by shaft electrical current Download PDFInfo
- Publication number
- CN201323490Y CN201323490Y CNU2008201576687U CN200820157668U CN201323490Y CN 201323490 Y CN201323490 Y CN 201323490Y CN U2008201576687 U CNU2008201576687 U CN U2008201576687U CN 200820157668 U CN200820157668 U CN 200820157668U CN 201323490 Y CN201323490 Y CN 201323490Y
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- China
- Prior art keywords
- bearing
- shaft
- insulation structure
- insulating
- end cap
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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 - Lifetime
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Abstract
The utility model relates to a bearing insulation structure used for an electric motor and capable of preventing a bearing from being damaged by shaft electrical current. The bearing insulation structure is mainly applied to a cage-type induction motor with power supplied by a frequency converter, and can avoid bearing electrical erosion because high frequency induction shaft current caused by the frequency converter forms a return circuit with a shaft, the bearing, an end cover and a baseframe, thereby protecting the bearing. A bearing insulation structure capable of preventing a bearing from being damaged by shaft electrical current, wherein mounting structure of the baseframe, the end cover, the bearing and a shaft sleeve does not change, the bearing is mounted in the bearing sleeve with an insulating layer structure, an insulation tie plate is underlaid between the end cover and the bearing sleeve, and an insulated sleeve and an insulating washer are mounted between fixing bolts of the end cover and the bearing sleeve. The utility model can realize the function of cutting off shaft current flowing by the bearing so as to prevent the bearing from being damaged and has an effect of preventing shaft current same as an insulating bearing. Furthermore, the bearing insulation structure has the advantages of simple and convenient processing, low cost, and no limit for bearing type, and is especially suitable to be applied to a middle or large electric motor.
Description
Technical field
The utility model relates to the bearing insulation structure, is used for can effectively protecting on the motor bearing to exempt from the bearing insulation structure of shaft current damage.Be mainly used in the cage induction motor (being commonly referred to " frequency-conversion and speed-regulation motor ") of inverter supply; can avoid high-frequency induction shaft current because of the frequency converter generation; in the loop that constitutes by axle, bearing, end cap, support, bearing is produced electroerosion, play the effect of protection bearing.
Background technology
The damage of bearing of motor in the past all is considered to relevant with mechanical factor, but along with the cage induction motor large-scale application of inverter supply, it is found that the inefficacy in advance of bearing also has related closely with electricity.The shaft current of time generation is more serious because frequency converter power to motor, when shaft current is flowed through the loop that is made of axle, bearing, end cap, support, will cause serious electroerosion to bearing working face, causes the motor cisco unity malfunction.
In order to eliminate the infringement of shaft current to bearing, the electrical insulation of one of the measure of the adopting bearing of will flowing through is exactly fallen, usually the measure of adopting is to select insulation bearing for use, but the insulation bearing existence costs an arm and a leg, the size type selecting is limited, many unfavorable factors such as the delivery cycle is long have seriously restricted the design selection and the buying of motor manufacturing firm.
Summary of the invention
The purpose of this utility model is: provide a kind of reliable protection bearing to exempt from the bearing insulation structure of shaft current damage, promptly use common bearing, also can play the effect same with insulation bearing.
The utility model is realized goal of the invention by following proposal: a kind of bearing insulation structure of protecting bearing to exempt from the shaft current damage; be located at end cap; bearing and shaft room; wherein; Bearing Installation is in having the bearing holder (housing, cover) of insulation layer structure; electric motor end cap and support; the mode that installs and fixes of bearing holder (housing, cover) is the same with tradition; just between end cap and bearing holder (housing, cover), served as a contrast one deck insulating pad; in addition; between the set bolt of end cap and bearing holder (housing, cover), add insulating sleeve and insulating washer; make between bearing and the end cap and can not form the loop; completely cut off shaft current, played the effect of protection bearing.
On the such scheme basis, the described bearing holder (housing, cover) that insulation layer structure arranged is meant at bearing outer ring and coats a layer insulating that jacket casing is on insulating barrier.
On the such scheme basis, described insulating pad is located at the contact-making surface place between bearing holder (housing, cover) and the end cap.
On the such scheme basis, described insulating sleeve is installed in the middle of the installation screw of end cap, in the outside of end cap insulating washer is installed, and set bolt is installed wherein.
Superiority of the present utility model is: this bearing insulation structure can realize cutting off the flow through function of bearing of shaft current, is not damaged with the protection bearing, and it prevents that the effect of shaft current is identical with insulation bearing.Process easy convenience, it is low to make maintenance cost, owing to can use plain bearing, the bearing type selecting is unrestricted, especially is suitable for use on the medium-and-large-sized motor.
Description of drawings
Fig. 1, the utility model structural representation
Fig. 2, the cross-sectional schematic of bearing holder (housing, cover) 2
Number in the figure
The 1-bearing
The 2-bearing holder (housing, cover)
21-bearing holder (housing, cover) 22-insulating barrier 23-sleeve
The 3-insulating pad
The 4-insulating sleeve
The 5-end cap
The 6-insulating washer
Embodiment
Ask for an interview the cross-sectional schematic of Fig. 1 the utility model structural representation and Fig. 2 bearing holder (housing, cover) 2; a kind of bearing insulation structure of protecting bearing to exempt from the shaft current damage; be located at 2 on end cap 5, bearing 1 and axle sleeve; bearing 1 is installed in the bearing holder (housing, cover) 2 of insulation layer structure; lining one deck insulating pad 3 between end cap 5 and bearing holder (housing, cover) 2, and between the set bolt of end cap 5 and bearing holder (housing, cover) 2, add insulating sleeve 4 and insulating washer 6.This bearing insulation structure can completely cut off the shaft current bearing of flowing through effectively, has played the effect of protection bearing, and is in full accord with the effect that adopts insulation bearing.
As Fig. 2, the bearing holder (housing, cover) 2 of tape insulation layer comprises bearing holder (housing, cover) 21, insulating barrier 22 and sleeve 23.
As Fig. 1, described insulating pad 3 is the part that a usefulness insulating material processes, and is installed between bearing holder (housing, cover) 2 and the end cap 5, forms insulation.
As Fig. 1, described insulating sleeve 4 is the part that a usefulness insulating material processes, and is installed in the middle of the installation screw of end cap 5, in the outside of end cap 5 insulating washer 6 is installed, and set bolt is installed wherein.
Can see the structural representation after whole bearing insulation structure is installed from Fig. 1,
The utility model is after using on the YVP-355 variable-frequency motor, and trial effect is very good, and easy to process, greatly reduces purchase cost.Now be generalized on the above motor of 355 seat No. and used.
Claims (3)
1, a kind of bearing insulation structure of protecting bearing to exempt from the shaft current damage; be located at end cap, bearing and shaft room; it is characterized in that; Bearing Installation is in having the bearing holder (housing, cover) of insulation layer structure; lining one deck insulating pad between end cap and bearing holder (housing, cover), and between the set bolt of end cap and bearing holder (housing, cover), add insulating sleeve and insulating washer.
2, protection bearing according to claim 1 exempts from the bearing insulation structure of shaft current damage, it is characterized in that: the described bearing holder (housing, cover) that insulation layer structure arranged is meant at bearing outer ring and coats a layer insulating that jacket casing is on insulating barrier.
3, protection bearing according to claim 1 exempts from the bearing insulation structure of shaft current damage, and it is characterized in that: described insulating pad is located at the contact-making surface place between bearing holder (housing, cover) and the end cap.4, protection bearing according to claim 1 exempts from the bearing insulation structure of shaft current damage, and it is characterized in that: described insulating sleeve is installed in the middle of the installation screw of end cap, in the outside of end cap insulating washer is installed, and set bolt is installed wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201576687U CN201323490Y (en) | 2008-12-23 | 2008-12-23 | Bearing insulation structure capable of preventing bearing from being damaged by shaft electrical current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201576687U CN201323490Y (en) | 2008-12-23 | 2008-12-23 | Bearing insulation structure capable of preventing bearing from being damaged by shaft electrical current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201323490Y true CN201323490Y (en) | 2009-10-07 |
Family
ID=41160862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201576687U Expired - Lifetime CN201323490Y (en) | 2008-12-23 | 2008-12-23 | Bearing insulation structure capable of preventing bearing from being damaged by shaft electrical current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201323490Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860112A (en) * | 2010-05-26 | 2010-10-13 | 山西防爆电机（集团）有限公司 | Insulating structure of variable frequency motor bearing chamber |
| CN102332767A (en) * | 2011-06-24 | 2012-01-25 | 东方电气（乐山）新能源设备有限公司 | Bearing insulation structure for 1.5 MW aerogenerator |
| CN102364828A (en) * | 2011-10-31 | 2012-02-29 | 永济新时速电机电器有限责任公司 | Insulated end cover of wind power generator |
| CN102377270A (en) * | 2010-08-20 | 2012-03-14 | 上海电气集团上海电机厂有限公司 | Insulating end cap applied to motor |
| CN102403844A (en) * | 2011-11-15 | 2012-04-04 | 中电电机股份有限公司 | Ground brush device of alternating current variable frequency motor |
| CN102497071A (en) * | 2011-11-29 | 2012-06-13 | 中电电机股份有限公司 | Assembly structure of insulating rolling bearing |
| CN104242530A (en) * | 2014-10-13 | 2014-12-24 | 中电电机股份有限公司 | Oil-lubricating rolling bearing assembly structure of vertical high-thrust motor |
| CN115487706A (en) * | 2021-06-17 | 2022-12-20 | 中国石油化工股份有限公司 | Stirrer electric insulation structure, stirrer and LDPE polymeric kettle |
-
2008
- 2008-12-23 CN CNU2008201576687U patent/CN201323490Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860112A (en) * | 2010-05-26 | 2010-10-13 | 山西防爆电机（集团）有限公司 | Insulating structure of variable frequency motor bearing chamber |
| CN102377270A (en) * | 2010-08-20 | 2012-03-14 | 上海电气集团上海电机厂有限公司 | Insulating end cap applied to motor |
| CN102332767A (en) * | 2011-06-24 | 2012-01-25 | 东方电气（乐山）新能源设备有限公司 | Bearing insulation structure for 1.5 MW aerogenerator |
| CN102364828A (en) * | 2011-10-31 | 2012-02-29 | 永济新时速电机电器有限责任公司 | Insulated end cover of wind power generator |
| CN102403844A (en) * | 2011-11-15 | 2012-04-04 | 中电电机股份有限公司 | Ground brush device of alternating current variable frequency motor |
| CN102497071A (en) * | 2011-11-29 | 2012-06-13 | 中电电机股份有限公司 | Assembly structure of insulating rolling bearing |
| CN104242530A (en) * | 2014-10-13 | 2014-12-24 | 中电电机股份有限公司 | Oil-lubricating rolling bearing assembly structure of vertical high-thrust motor |
| CN115487706A (en) * | 2021-06-17 | 2022-12-20 | 中国石油化工股份有限公司 | Stirrer electric insulation structure, stirrer and LDPE polymeric kettle |
| CN115487706B (en) * | 2021-06-17 | 2024-04-26 | 中国石油化工股份有限公司 | Stirrer electric insulation structure, stirrer and LDPE (Low-Density polyethylene) polymerization kettle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI SHANGDIAN MOTOR CO., LTD. Free format text: FORMER NAME: SHANGHAI SHANGDIAN ELECTRICAL MACHINERY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 201807 Shanghai city Jiading District Hing Road 1200 Patentee after: Shanghai Shangdian Elec. Machinery Corp. Address before: 200240 Jiangchuan Road, Shanghai, No. 555, No. Patentee before: Shanghai Shangdian Electric Machinery Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091007 |
|
| CX01 | Expiry of patent term |