CN2192748Y - Underoil pump for transformer - Google Patents
Underoil pump for transformer Download PDFInfo
- Publication number
- CN2192748Y CN2192748Y CN 94225084 CN94225084U CN2192748Y CN 2192748 Y CN2192748 Y CN 2192748Y CN 94225084 CN94225084 CN 94225084 CN 94225084 U CN94225084 U CN 94225084U CN 2192748 Y CN2192748 Y CN 2192748Y
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- CN
- China
- Prior art keywords
- impeller
- transformer
- oil
- utility
- component
- 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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Abstract
The utility model belongs to a component of a transformer product. The component of a transformer product is suitable for a transformer which forces oil to circulate and cool. The component of a transformer product comprises a motor, an impeller, a pump body, an input port, an output port, etc. The component of a transformer product is characterized in that The oil transport chamber of the pump body and an impeller chamber are a containing cavity which is directly connected into an integral body, and a larynx head part in the prior art is not arranged. The impeller and the pump body are made respectively adopting precision cast steel with small eutectic carbide and precision cast steel. The utility model solves the problems that the prior art generates the low pressure zone of cavitation, and a material is easily leaked, and therefore, the utility model has the advantages of long service life, high reliability, etc.
Description
The utility model belongs to the assembly of power transformer product, is applicable to the transformer of forced oil-circulation cooling.It usually with the forced oil-circulation forced air cooler or the but supporting use of device of forced oil circulation water-cooling that are installed on the oil tank of transformer, also can with the supporting use of oil conditioner, in order to carry insulating oil.
Existing transformer is made up of motor, impeller, the pump housing, inlet opening and delivery outlet etc. with oil-immersed pump.This oil-immersed pump drives the wheel rotation that is installed in motor shaft one end by the rotation of motor in use, sucks transformer oil from the inlet opening by the centrifugal action of impeller and sends to delivery outlet through output cavity by impeller, to reach the purpose of carrying insulating oil.Its deficiency is: 1, because output cavity is a larynx portion by the impeller outer edge and the pump housing constitutes, the blade wheel chamber that constitutes in the larynx portion and the impeller outer side of the pump housing just becomes the low pressure area that produces cavitation erosion like this, the cavitation effect of low pressure area make the surface metal of the pump housing and impeller a large amount of be stripped from, seriously influence the safe operation of transformer; 2, because the pump housing and impeller are that employing density is low, the cast iron of bad mechanical strength is made, therefore easily cause seepage oil, simultaneously also easily cavitation erosion.The working life that seepage oil and cavitation erosion have reduced oil-immersed pump, and more seriously be the reliable operation that influences transformer.
The purpose of this utility model provides and resists the cavitation erosion ability, prevents seepage, improves a kind of transformer oil-immersed pump of working life and reliability.
The purpose of this utility model can reach by following measure: it comprises motor, impeller, the pump housing, inlet opening, delivery outlet etc., and its special way is: the oil transportation chamber of the pump housing and blade wheel chamber cavity volume for directly combining as a whole, and do not have larynx portion; Impeller adopts the little accurate cast steel of eutectic carbide to make; The pump housing adopts accurate cast steel to make.
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is an example structure schematic representation of the present utility model;
Fig. 2 is the structure partial schematic representation of prior art.
See figures.1.and.2.End at the motor shaft 4 of motor 8 is equipped with impeller 5.Middle part one side and the outer rim of the pump housing 3 are respectively equipped with inlet opening 2 and delivery outlet 1.The pump housing 3 opposite sides are connected with a side sealing of motor housing 7.The oil transportation chamber of the pump housing 3 of the present utility model and the blade wheel chamber cavity volume 6 for directly combining as a whole has been cancelled the larynx portion 10 in the prior art.Simultaneously in the prior art by larynx portion 10 and impeller 5 outer rims with oil transportation chamber 11 and the structure that blade wheel chamber 9 separates, in the utility model, do not existed.Adopt low density cast iron materials bad mechanical strength, easy to leak oil to reach shortcomings such as easily cavitation erosion for eliminating prior art middle pump body 3 and impeller 5, impeller 5 of the present utility model adopts the little accurate cast steel of eutectic carbide to make; The pump housing 3 adopts accurate Cast Steel to make.
Because the larynx formula that the oil transportation chamber of the utility model pump housing and blade wheel chamber become in the prior art connects into directly connecting cavity volume of all-in-one-piece, has reduced the generation condition of low-pressure area, has fundamentally solved the generation of cavitation erosion; Because impeller and the pump housing adopt respectively the little precise steel casting of eutectic carbide and precise steel casting, cavitation ability, anti-leakage problems have been improved again. Therefore, the utlity model has resist the cavitation erosion ability strong, prevent seepage, long service life, high reliability.
Claims (3)
1, a kind of transformer oil-immersed pump comprises motor, impeller, the pump housing, inlet opening, delivery outlet etc., it is characterized in that: the oil transportation chamber of the pump housing and the blade wheel chamber cavity volume for directly combining as a whole.
2, a kind of transformer oil-immersed pump according to claim 1 is characterized in that: impeller is to adopt the little accurate cast steel of eutectic carbide to make.
3, according to claim 1 and 2 described a kind of transformer oil-immersed pumps, it is characterized in that: the pump housing is to adopt accurate cast steel to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94225084 CN2192748Y (en) | 1994-01-14 | 1994-01-14 | Underoil pump for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94225084 CN2192748Y (en) | 1994-01-14 | 1994-01-14 | Underoil pump for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2192748Y true CN2192748Y (en) | 1995-03-22 |
Family
ID=33838351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94225084 Expired - Fee Related CN2192748Y (en) | 1994-01-14 | 1994-01-14 | Underoil pump for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2192748Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452859A (en) * | 2013-09-16 | 2013-12-18 | 北京富特盘式电机有限公司 | Disc-motor axial flow pump for cooling of transformer |
-
1994
- 1994-01-14 CN CN 94225084 patent/CN2192748Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452859A (en) * | 2013-09-16 | 2013-12-18 | 北京富特盘式电机有限公司 | Disc-motor axial flow pump for cooling of transformer |
| CN103452859B (en) * | 2013-09-16 | 2015-03-11 | 北京富特盘式电机有限公司 | Disc-motor axial flow pump for cooling of transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |