CN201004575Y - Insulation structure of large and middle DC electromotor end cover - Google Patents
Insulation structure of large and middle DC electromotor end cover Download PDFInfo
- Publication number
- CN201004575Y CN201004575Y CNU2006201624130U CN200620162413U CN201004575Y CN 201004575 Y CN201004575 Y CN 201004575Y CN U2006201624130 U CNU2006201624130 U CN U2006201624130U CN 200620162413 U CN200620162413 U CN 200620162413U CN 201004575 Y CN201004575 Y CN 201004575Y
- Authority
- CN
- China
- Prior art keywords
- cover
- shaft
- housing
- bearing
- end cap
- 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
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- Motor Or Generator Frames (AREA)
Abstract
The utility model discloses an insulating structure of large and medium electric motor end cover and comprises a shaft that covers over the rotating shaft, a shaft sheath that is arranged outside the shaft, inner and outer shaft cover that are arranged on both ends of the shaft sheath as well as an end cover that is arranged outside the shaft sheath and connects with the motor base; an insulating layer is arranged between the shaft sheath and the end cover. The utility model that arranges insulating layer on the end cover can prevent the forming of the shaft current by cutting the loop of the shaft and the motor base, thus can prevent the motor shaft from damaging by the shaft current, thus can prolong the survival life of the motor, and also can reduce the maintain cost and is easily dismounted.
Description
Technical field
The utility model relates to a kind of insulation system of large and middle size motor end cap.
Technical background
As everyone knows, when adopting static power supply in medium-and-large-sized direct current machine, pulse current electric motor, variable-frequency motor, the flutter component of electric current can produce capacitance current between rotor winding and iron core, and it can produce potential difference between rotating shaft and the earth.Shaft voltage less than infringement, has only the shaft current of formation just can destroy motor bearings to motor.
The condition that shaft current forms:
(1) bearing inner race → bearing roller → bearing outer ring → bearing chamber → support forms the closed-loop path;
(2) there are potential difference and shaft voltage between the bearing enclose;
More than two conditions lack one, just can prevent shaft current formation.
In the prior art, the loop of adopting insulation bearing to cut off above-mentioned formation shaft current usually, but insulation bearing costs an arm and a leg, and bearing itself is easily loss again, in use needs frequent replacing, makes manufacturing cost and maintenance cost improve.
The utility model content
So purpose is overcoming the deficiencies in the prior art, a kind of destruction that can prevent shaft current to motor is provided, and can reduces the insulation system of the large and middle size motor end cap of motor manufacturing cost.
The technical scheme that realizes above-mentioned purpose is: a kind of insulation system of medium-and-large-sized electric motor end cap, comprise the bearing, the bearing holder (housing, cover) that is located at the bearing outer end that are sheathed on rotating shaft, be located at the interior outer bearing cover at bearing holder (housing, cover) two ends and the end cap that is located at the bearing holder (housing, cover) outer end and links to each other, be provided with insulating barrier between described bearing holder (housing, cover) and the end cap with support.
The insulation system of above-mentioned large and middle size motor end cap, wherein, described insulating barrier be located on the outer face of bearing holder (housing, cover) and with the bearing holder (housing, cover) hot jacket on the inner face of end cap.
The insulation system of above-mentioned large and middle size motor end cap, wherein, described insulating barrier is made by composite insulating material.
The insulation system of above-mentioned large and middle size motor end cap, wherein, both sides, described bearing holder (housing, cover) outer end respectively are provided with a ladder, and described insulating barrier can snap in the ladder to prevent that insulating barrier from moving axially.
Adopt the insulation system of large and middle size motor end cap of the present utility model, promptly utilize end cap to be provided with insulating barrier, the loop that has cut off bearing and support stops the formation of shaft current, can prevent that shaft current from destroying motor bearings, thereby effectively prolong the useful life of motor, and cost reduces easy accessibility in feasible the maintenance.
Description of drawings
Fig. 1 is the insulated end cover structural representation of medium-and-large-sized motor of the present utility model.
Embodiment
See also Fig. 1, the insulated end cover structure of a kind of medium-and-large-sized motor of the present utility model, comprise the bearing 5, the bearing holder (housing, cover) 2 that is located at bearing 5 outer ends that are sheathed on rotating shaft 7, be located at the interior outer bearing cover 1,6 at bearing holder (housing, cover) 2 two ends and be located at bearing holder (housing, cover) 2 outer ends and with the end cap 3 of support, characteristics of the present utility model are to be provided with insulating barrier 4 between bearing holder (housing, cover) 2 and end cap 3.
Insulating barrier 4 is made by composite insulating material.Bearing 5 adopts general roller bearing commonly used.Insulating barrier 4 be located on the outer face of bearing holder (housing, cover) 2 and with bearing holder (housing, cover) 2 hot jackets on the inner face of end cap 3.Both sides, bearing holder (housing, cover) 2 outer end respectively are provided with a ladder 41, and insulating barrier 4 can snap in the ladder 41 to prevent that insulating barrier 4 from moving axially.
Insulating barrier 4 is earlier wrapped on the outer face of bearing holder (housing, cover) 2, again with bearing holder (housing, cover) 2 hot jackets of tape insulation layer 4 in end cap 3, make whole insulated end cover, embedded insulating barrier 4 in the end cap 3 that links to each other with support, make the shaft current that produces from rotating shaft 7 to arrive support, thereby cut off the shaft current loop by end cap 3.Inside cap 1 and outer bearing cover 6 assembling backs only cooperate with the end face of bearing holder (housing, cover) 2, and the shaft current on it also can't be passed insulating barrier 4 and be arrived support; Simultaneously, rotating shaft 7 and inside cap 1,6 of outer bearing covers leave the gap, and shaft current also can't form the loop.Therefore adopt such structure, the shaft current that insulated has fully been protected bearing 5.
Above embodiment is only for the usefulness that the utility model is described, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.
Claims (4)
1. the insulation system of a large and middle size motor end cap, comprise the bearing, the bearing holder (housing, cover) that is located at the bearing outer end that are sheathed on rotating shaft, be located at the interior outer bearing cover at bearing holder (housing, cover) two ends and the end cap that is located at the bearing holder (housing, cover) outer end and links to each other with support, it is characterized in that, be provided with insulating barrier between described bearing holder (housing, cover) and the end cap.
2. the insulation system of large and middle size motor end cap according to claim 1 is characterized in that, described insulating barrier be located on the outer face of bearing holder (housing, cover) and with the bearing holder (housing, cover) hot jacket on the inner face of end cap.
3. the insulation system of large and middle size motor end cap according to claim 1 is characterized in that, described insulating barrier is made by composite insulating material.
4. the insulation system of large and middle size motor end cap according to claim 1 is characterized in that, both sides, described bearing holder (housing, cover) outer end respectively are provided with a ladder, and described insulating barrier can snap in the ladder to prevent that insulating barrier from moving axially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201624130U CN201004575Y (en) | 2006-12-29 | 2006-12-29 | Insulation structure of large and middle DC electromotor end cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201624130U CN201004575Y (en) | 2006-12-29 | 2006-12-29 | Insulation structure of large and middle DC electromotor end cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201004575Y true CN201004575Y (en) | 2008-01-09 |
Family
ID=39040118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201624130U Expired - Fee Related CN201004575Y (en) | 2006-12-29 | 2006-12-29 | Insulation structure of large and middle DC electromotor end cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201004575Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178636A (en) * | 2011-12-22 | 2013-06-26 | 襄阳南车电机技术有限公司 | Non-transmission-end insulating end cover of steel rail grinding wagon electric motor |
| CN106329792A (en) * | 2016-08-31 | 2017-01-11 | 无锡太昌精密机械有限公司 | Motor cover |
| CN114123607A (en) * | 2021-11-29 | 2022-03-01 | 浙江义乌市自来水有限公司 | Insulation system for preventing shaft current of motor |
-
2006
- 2006-12-29 CN CNU2006201624130U patent/CN201004575Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178636A (en) * | 2011-12-22 | 2013-06-26 | 襄阳南车电机技术有限公司 | Non-transmission-end insulating end cover of steel rail grinding wagon electric motor |
| CN106329792A (en) * | 2016-08-31 | 2017-01-11 | 无锡太昌精密机械有限公司 | Motor cover |
| CN114123607A (en) * | 2021-11-29 | 2022-03-01 | 浙江义乌市自来水有限公司 | Insulation system for preventing shaft current of motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Xueyan Inventor after: Wang Gang Inventor after: Chen Weimin; Inventor before: Zhang Xueyan Inventor before: Wang Gang Inventor before: Chen Weiming; |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHANG XUEYAN; WANG LIHUA; CHEN WEIMING TO: ZHANG XUEYAN; WANG LIHUA; CHEN WEIMIN |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080109 Termination date: 20151229 |
|
| EXPY | Termination of patent right or utility model |