CN102606523A - Rotor unit of service water pump for nuclear power station - Google Patents
Rotor unit of service water pump for nuclear power station Download PDFInfo
- Publication number
- CN102606523A CN102606523A CN2012100833590A CN201210083359A CN102606523A CN 102606523 A CN102606523 A CN 102606523A CN 2012100833590 A CN2012100833590 A CN 2012100833590A CN 201210083359 A CN201210083359 A CN 201210083359A CN 102606523 A CN102606523 A CN 102606523A
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- impeller
- axle sleeve
- pump
- pump shaft
- power station
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Abstract
The invention discloses a rotor unit of a service water pump for a nuclear power station. The rotor unit comprises a pump shaft, impellers, a shaft sleeve and an impeller nut, wherein a set position at the upper part of the pump shaft is provided with a shaft shoulder; the impellers are composed of a primary impeller, a secondary impeller and a final impeller which are installed on the pump shaft at intervals on a same direction from bottom to top, and the primary impeller, the secondary impeller and the final impeller are the same in structures and dimensions; the impeller nut is installed at the lower end of the pump shaft; the primary impeller and the impeller nut are separated by a lower end shaft sleeve; the primary impeller and the secondary impeller, the secondary impeller and the final impeller are respectively separated by a middle shaft sleeve and the lower end shaft sleeve which are arranged in order; and the final impeller and the shaft shoulder are separated by an upper end shaft sleeve. The rotor unit of the service water pump for the nuclear power station disclosed by the invention can improve the ability of highly sand-contained water scouring resistance of the impellers, thereby increasing the service life of the impellers.
Description
Technical field
The present invention relates to a kind of house service pump that is used for nuclear power station, be specifically related to a kind of rotor part that is used for the house service pump of nuclear power station.
Background technique
The working medium that is used for the house service pump of nuclear power station is to contain sea of sand water.The major function of essential service water pump in nuclear power station is that the liquid heat that the component cooling water system transmission comes finally is transferred to seawater, and extracting seawater is cooled off component cooling water in other words.It is as the ultimate heat sink of nuclear island, and its significance is self-evident.
House service pump is to carry undressed seawater in the AP1000 nuclear power station, and the sand content in the seawater is than higher, and its flow passage components especially impeller need the anti-erosion that contains the sand medium.Under possible condition, the lift that as far as possible reduces the single-stage impeller is to solve the anti-effective way that contains the erosion of sand water of impeller.The house service pump of existing structure is to adopt the single-stage impeller, so the diameter of impeller is bigger, and the linear velocity at impeller outlet place is higher, the ability that causes the erosion of anti-high sand medium also a little less than.
Summary of the invention
The objective of the invention is provides a kind of rotor part that is used for the house service pump of nuclear power station in order to overcome the deficiency of existing technology, and it can improve the ability of impeller Nai Gaosha water erosion, thereby has increased the working life of impeller.
The technological scheme that realizes above-mentioned purpose is: a kind of rotor part that is used for the house service pump of nuclear power station, comprise pump shaft, impeller and impeller nut, wherein,
The top desired location of said pump shaft is provided with a shaft shoulder;
Said impeller constitutes by be installed in the first stage impeller on the said pump shaft, secondary impeller and impeller from bottom to top at interval in the same way, and the structure of said first stage impeller, secondary impeller and impeller and size are all identical;
Said impeller nut is installed in the lower end of said pump shaft;
Said first stage impeller is through being arranged on the lower end axle sleeve axially locating of said impeller nut upper end;
Said secondary impeller and said impeller are respectively through being successively set on the middle axle sleeve and the lower end axle sleeve axially locating of said first stage impeller upper end and said secondary impeller upper end;
Spacing between the said impeller and the said shaft shoulder through the upper end axle sleeve.
The rotor part of the above-mentioned house service pump that is used for nuclear power station, wherein, said in the middle of between axle sleeve and the lower end axle sleeve, be provided with one between said upper end bearing and the said shaft shoulder respectively and get rid of sand and encircle.
The rotor part of the above-mentioned house service pump that is used for nuclear power station, wherein, the top of the outer circumferential face of said lower end axle sleeve is the little down big conical surface of, so that the wheel hub entrance point smooth transition of lower end axle sleeve and said first stage impeller, secondary impeller and impeller.
The rotor part of the above-mentioned house service pump that is used for nuclear power station; Wherein, The lower end surface of said pump shaft is provided with a tapped blind hole coaxial with pump shaft; Said impeller nut is the covering cap shape nut, and the surperficial central authorities of its block offer a through hole, and said impeller nut passes through hole through one and is threaded in the lower end that lock screw in the tapped blind hole of said pump shaft is installed in said pump shaft.
The technological scheme of the rotor part of the house service pump that is used for nuclear power station of the present invention; Adopt between the upper and lower at a distance from three grades of impellers that are connected in series; The relative single-stage impeller of these three grades of impellers has reduced outlet diameter; Reduce the lift of impeller and reduced the linear velocity of impeller outlet place medium, thereby improved the ability of impeller Nai Gaosha water erosion, increased the working life of impeller.
Description of drawings
Fig. 1 is the structural representation of the rotor part of the house service pump that is used for nuclear power station of the present invention.
Embodiment
In order to understand technological scheme of the present invention better, below through embodiment particularly and combine accompanying drawing at length to explain:
See also Fig. 1, the rotor part that is used for the house service pump of nuclear power station of the present invention comprises pump shaft 1, impeller, impeller nut 3, three lower end axle sleeves 4, axle sleeve 5 in the middle of two, upper end axle sleeve 6 and three get rid of husky ring 7, wherein:
The top desired location of pump shaft 1 is provided with a shaft shoulder 10; The lower end surface of pump shaft 1 is provided with a tapped blind hole coaxial with pump shaft;
Impeller is made up of the first stage impeller 21, secondary impeller 22 and the impeller 23 that are installed at interval from bottom to top on the pump shaft 1 in the same way, and the structure of first stage impeller 21, secondary impeller 22 and impeller 23 and size are all identical;
Separate through a lower end axle sleeve 4 between first stage impeller 21 and the impeller nut 3, to confirm the setting height(from bottom) of first stage impeller 21;
Separate through a middle axle sleeve 5 and a lower end axle sleeve 4 successively between first stage impeller 21 and the secondary impeller 22, to confirm the setting height(from bottom) of secondary impeller 22; Be provided with one between middle axle sleeve 5 and the lower end axle sleeve 4 and get rid of husky ring 7;
Separate through a middle axle sleeve 5 and a lower end axle sleeve 4 successively between secondary impeller 22 and the impeller 23, to confirm the setting height(from bottom) of impeller 23; Be provided with one between middle axle sleeve 5 and the lower end axle sleeve 4 and get rid of husky ring 7;
Separate through a upper end axle sleeve 6 between the impeller 23 and the shaft shoulder 10, so that first stage impeller 21, secondary impeller 22 and impeller 23 axially locating are on pump shaft 1; Be provided with one between this upper end axle sleeve 6 and the shaft shoulder 10 and get rid of husky ring 7.
The top of the outer circumferential face of lower end axle sleeve 4 is the little down big conical surface of; So that the wheel hub entrance point smooth transition of lower end axle sleeve 4 and first stage impeller 21, secondary impeller 22 and impeller 23; Reduce the flowing pressure of medium, improve the hydraulic performance of impeller at the impeller inlet end.
The rotor part that is used for the house service pump of nuclear power station of the present invention adopts three grades of impellers; Raised the mounting point of impeller; Therefore reduced the lift of impeller, and the single-stage impeller reduces outlet diameter relatively, has reduced the flow velocity of impeller outlet medium; Thereby improved the ability of impeller Nai Gaosha water erosion, increased the working life of impeller.In addition; Hexagonal spiral shell head screw in lock screw 30 adopts; The spiral shell head of lock screw 30 is against on the step surface of stepped shaft through hole of impeller nut 3, and the spiral shell head of lock screw 30 does not expose the surface of the block of impeller nut 3, both can prevent that impeller nut 3 from becoming flexible because of the counter-rotating of pump shaft 1; Can drop to minimumly again to medium in the flow interfering of the entrance point of pump, can not influence hydraulic performance.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; And be not with opposing qualification of the present invention; As long as in connotation scope of the present invention, all will drop in claims scope of the present invention the above embodiment's variation, modification.
Claims (4)
1. a rotor part that is used for the house service pump of nuclear power station comprises pump shaft, impeller and impeller nut, it is characterized in that,
The top desired location of said pump shaft is provided with a shaft shoulder;
Said impeller constitutes by be installed in the first stage impeller on the said pump shaft, secondary impeller and impeller from bottom to top at interval in the same way, and the structure of said first stage impeller, secondary impeller and impeller and size are all identical;
Said impeller nut is installed in the lower end of said pump shaft;
Said first stage impeller is through being arranged on the lower end axle sleeve axially locating of said impeller nut upper end;
Said secondary impeller and said impeller are respectively through being successively set on the middle axle sleeve and the lower end axle sleeve axially locating of said first stage impeller upper end and said secondary impeller upper end;
Spacing between the said impeller and the said shaft shoulder through the upper end axle sleeve.
2. the rotor part that is used for the house service pump of nuclear power station according to claim 1 is characterized in that, said in the middle of between axle sleeve and the lower end axle sleeve, be provided with one between said upper end bearing and the said shaft shoulder respectively and get rid of sand and encircle.
3. the rotor part that is used for the house service pump of nuclear power station according to claim 1; It is characterized in that; The top of the outer circumferential face of said lower end axle sleeve is the little down big conical surface of, so that the wheel hub entrance point smooth transition of lower end axle sleeve and said first stage impeller, secondary impeller and impeller.
4. the rotor part that is used for the house service pump of nuclear power station according to claim 1; It is characterized in that; The lower end surface of said pump shaft is provided with a tapped blind hole coaxial with pump shaft; Said impeller nut is the covering cap shape nut, and the surperficial central authorities of its block offer a through hole, and said impeller nut passes through hole through one and is threaded in the lower end that lock screw in the tapped blind hole of said pump shaft is installed in said pump shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100833590A CN102606523A (en) | 2012-03-27 | 2012-03-27 | Rotor unit of service water pump for nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100833590A CN102606523A (en) | 2012-03-27 | 2012-03-27 | Rotor unit of service water pump for nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102606523A true CN102606523A (en) | 2012-07-25 |
Family
ID=46524192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100833590A Pending CN102606523A (en) | 2012-03-27 | 2012-03-27 | Rotor unit of service water pump for nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102606523A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103675U (en) * | 1991-08-15 | 1992-05-06 | 沈阳潜水泵厂 | Submerged bittern pump |
| EP0947701A1 (en) * | 1998-03-30 | 1999-10-06 | Sulzer Weise GmbH | Multistage centrifugal pump |
| CN201582127U (en) * | 2009-12-01 | 2010-09-15 | 上海连成（集团）有限公司 | Novel two-stage double-tube inlet double-suction pump rotor |
| CN201599199U (en) * | 2009-11-27 | 2010-10-06 | 沈阳鼓风机集团有限公司 | Electric auxiliary water supply pump of nuclear secondary pump for 1000MW nuclear power station |
| CN202031872U (en) * | 2011-04-06 | 2011-11-09 | 上海太平洋制泵(集团)有限公司 | Novel high-speed multistage pump rotor |
| CN202597224U (en) * | 2012-03-27 | 2012-12-12 | 上海阿波罗机械股份有限公司 | Station-service water pump rotor part for nuclear power plant |
-
2012
- 2012-03-27 CN CN2012100833590A patent/CN102606523A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103675U (en) * | 1991-08-15 | 1992-05-06 | 沈阳潜水泵厂 | Submerged bittern pump |
| EP0947701A1 (en) * | 1998-03-30 | 1999-10-06 | Sulzer Weise GmbH | Multistage centrifugal pump |
| CN201599199U (en) * | 2009-11-27 | 2010-10-06 | 沈阳鼓风机集团有限公司 | Electric auxiliary water supply pump of nuclear secondary pump for 1000MW nuclear power station |
| CN201582127U (en) * | 2009-12-01 | 2010-09-15 | 上海连成（集团）有限公司 | Novel two-stage double-tube inlet double-suction pump rotor |
| CN202031872U (en) * | 2011-04-06 | 2011-11-09 | 上海太平洋制泵(集团)有限公司 | Novel high-speed multistage pump rotor |
| CN202597224U (en) * | 2012-03-27 | 2012-12-12 | 上海阿波罗机械股份有限公司 | Station-service water pump rotor part for nuclear power plant |
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Application publication date: 20120725 |