CN101818732A - Centrifugal charging pump for use in nuclear power plant - Google Patents
Centrifugal charging pump for use in nuclear power plant Download PDFInfo
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- CN101818732A CN101818732A CN201010151478A CN201010151478A CN101818732A CN 101818732 A CN101818732 A CN 101818732A CN 201010151478 A CN201010151478 A CN 201010151478A CN 201010151478 A CN201010151478 A CN 201010151478A CN 101818732 A CN101818732 A CN 101818732A
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Abstract
The invention relates to a pump, in particular to a centrifugal charging pump for use in a nuclear power plant. In the invention, the first stage of an impeller adopts a double suction structure which effectively improves the anti-cavitation performance of the charging pump; and an intermediate structure is adopted to make an axial force balance basically, so the operational safety of the charging pump is improved.
Description
Technical field:
The present invention relates to a kind of pump, relate in particular to a kind of centrifugal charging pump for use in nuclear power plant.
Background technique:
On to fill pump be the important water pump that popularity is only second to main pump in the nuclear power station.When nuclear power station one loop absolute pressure is higher than certain value, on fill pump just must operation.Under the situation that main pump does not put into operation, on fill pump still need for main pump provide mechanical seal the axle water shutoff; When a loop occurs as loss of-coolant accident (LOCA)s such as cuts, on fill pump and must guarantee a loop normal parallel running under small flow, carry out the high-voltage safety injection.
On fill pump peace to annotate working temperature be more than 100 ℃, mercury vapour erosion performance is had certain requirement; Simultaneously, on fill lift of pump and reach more than the 1000m, axial force is very big.Existing sectional type multistage pump commonly used all can't satisfy the requirement of centrifugal charging pump for use in nuclear power plant at aspects such as cavitation performance, lift and material behaviors.
Summary of the invention:
For addressing the above problem, impeller chopped-off head of the present invention adopts the double suction structure, and adopts intermediate structure.On effectively having improved, the double suction structure fills the cavitation performance of pump, and the employing intermediate structure, the axial force that impeller at different levels is produced is cancelled out each other, and does not need to adopt Balance disc or balancing drum structure just can realize that huge end thrust reaches balance substantially in the pump chamber, fills the Safety performance of pump on having improved.
Realize that the technological scheme that above-mentioned purpose adopted is:
Fill pump on a kind of sectional type is centrifugal, form by frame, impeller, end cap, bearing, axle, first-stage double-absorption impeller, stator, impeller snap ring, mechanical seal, thrust disc etc., it is characterized in that, described a kind of centrifugal charging pump for use in nuclear power plant is a sectional type bivalve body multistage centrifugal pump, the import and export dead in line of pump and vertical with the pump main shaft.
Described impeller chopped-off head adopts the double suction structure, after water is flow to by import, divides two-way to flow into first stage impeller, crosses water flow passage via two and enters next stage;
Described chopped-off head suction chamber is near impeller one side with away from impeller one side gland is being arranged, and removes the dismounting that gland can guarantee double-entry impeller;
Described chopped-off head suction chamber has pump water inlet section water exit end simultaneously, and inlet segment overlaps with the water exit end center line, and perpendicular to main shaft;
Described chopped-off head suction chamber has a pump discharge groove;
Described intermediate structure has 3 backwater runners, and wherein two is the runner that enters the impeller next stage, and another is for connecting the backwater runner of outlet, and this structure is balancing axial thrust effectively, makes pump safe and reliable.
With Fig. 1 specifying that embodiment did more than for the present invention; but the present invention is not limited to the foregoing description; that describes in the foregoing description and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.
The invention has the beneficial effects as follows: centrifugal charging pump of the present invention is reasonable in design, compact structure, and the Safety performance height can carry out the dismounting maintenance to pump under the situation of not tearing pipeline open, satisfied the requirement of centrifugal charging pump for use in nuclear power plant fully.
Description of drawings:
Fig. 1 is the structural representation of centrifugal charging pump for use in nuclear power plant of the present invention
Fig. 2 is same embodiment's a chopped-off head suction chamber structural representation
Fig. 3 is same embodiment's an intermediate structure schematic representation
Among the figure: 1. first-stage double-absorption impeller, 2. dividing plate, 3. fourth stage impeller, 4. intermediate, 5. preoral loop, 6. stator, 7. back choma, 8. frame, 9. level V impeller, 10. tailstock, 11. bearings, 12. end caps, 13. the impeller snap ring, 14. main shafts, 15. static pressure water lubriucated bearings, 16. " O " RunddichtringO, 17. closed chamber, 18. bearings, 19. plane thrust block pads, 20. thrust disc, 21. thrust disc interstage sleeves, 22. bearing chambers, 23. mechanical seal, 24. suction chamber glands, 25. impeller glands, 26. the double suction chamber, 27. inlet segments, 28. suction chamber gland grooves, 29. impeller gland groove, 30. suction chambers, 31. water exit ends, 32. impeller is crossed water flow passage, 33. water flow passage that go out to make a slip of the tongue, 34. entities
Embodiment:
For technological means, character of innovation that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1, filling pump on is made up of frame (8), impeller (3,9), end cap (12), bearing (18), main shaft (14), first-stage double-absorption impeller (1), double suction chamber (24), intermediate (4), stator (6), impeller snap ring (13), mechanical seal (23), thrust disc (20) etc.On fill pump and have 12 grades, 4 grades of suction ports point to coupling, 8 grades opposite with suction port, middlely adopts intermediate (4) connection, on fill pump and balance each other with the axial force and the spindle nose power of 4 grades of impellers.
Double suction chamber (1) mainly by inlet segment (8) as shown in Figure 2, suction chamber (11), and water exit end (12), impeller gland groove (10), suction chamber gland groove (9) is formed.Inlet segment and water exit end dead in line, vertical with the pump main shaft.
Suction chamber is the double volute form, to guarantee the water inlet of double-entry impeller both direction; The mounting or dismounting of first-stage double-absorption impeller are for convenience opened in double suction chamber (26) impeller gland groove (29) and suction chamber gland groove (28) are housed, and suction chamber gland (24) is connected with double suction chamber (26) with screw with impeller gland (25); Have the pump discharge groove in double suction chamber (26), an end is connected with impeller backwater runner, and the other end is connected with water exit end (31).
Intermediate as shown in Figure 3 has 3 to cross water channel, and promptly two impellers are crossed water flow passage (32) and the water flow passage (33) that goes out to make a slip of the tongue, and water is crossed water flow passage (32) by fourth stage impeller (3) by impeller and flowed into level V impeller (9); Last water flows to outlet by impeller via intermediate (4).There are eight grades of impellers in the left side of intermediate (4), and there is the level Four impeller on the right side, and the impeller about intermediate adopts back-to-back mounting type, and radial force is reduced, and improves the Safety performance of pump operation.
With Fig. 1 specifying that embodiment did more than for the present invention; but the present invention is not limited to the foregoing description; that describes in the foregoing description and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.
Claims (9)
1. a centrifugal charging pump for use in nuclear power plant comprises frame (8), first-stage double-absorption impeller (1), double suction chamber (26), intermediate (4), stator (6), main shaft (14), bearing (18), thrust disc parts such as (20).
2. double suction according to claim 1 chamber (26) is characterized in that having impeller gland groove (29) near impeller one side.
3. double suction according to claim 1 chamber (26) is characterized in that having suction chamber gland groove (28) away from impeller one side,
4. double suction according to claim 1 chamber (26) is characterized in that guaranteeing the dismounting of first-stage double-absorption impeller (1), and after installing impeller gland and suction chamber gland, plays the effect of common suction chamber.
5. double suction according to claim 1 chamber (26) is characterized in that the mistake water flow passage that has two to enter the next stage impeller.
6. double suction according to claim 1 chamber (26) is characterized in that having a pump discharge groove.
7. double suction according to claim 1 chamber (26) is characterized in that having simultaneously inlet segment (27) and water exit end (31), and inlet segment (27) overlaps with water exit end (31) center line, and perpendicular to main shaft.
8. intermediate according to claim 1 (4) is characterized in that having 2 impellers that lead to next stage to cross water flow passage (32).
9. intermediate according to claim 1 (4) is characterized in that double volute is merged into the water flow passage (33) that to make a slip of the tongue, and the water flow passage that goes out to make a slip of the tongue is led to outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010151478A CN101818732A (en) | 2010-04-19 | 2010-04-19 | Centrifugal charging pump for use in nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010151478A CN101818732A (en) | 2010-04-19 | 2010-04-19 | Centrifugal charging pump for use in nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101818732A true CN101818732A (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010151478A Pending CN101818732A (en) | 2010-04-19 | 2010-04-19 | Centrifugal charging pump for use in nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101818732A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606506A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Stator component of charging pump for nuclear power station |
| CN102606484A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Charging pump for nuclear power station |
| CN105195989A (en) * | 2015-09-28 | 2015-12-30 | 安泰科技股份有限公司 | Method for manufacturing thrust disc of main pump in nuclear power plant |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10259799A (en) * | 1997-03-19 | 1998-09-29 | Hitachi Ltd | Centrifugal pump |
| CN2419393Y (en) * | 2000-05-16 | 2001-02-14 | 沈阳化工泵制造厂 | First stage separate double sucking impeller for multi-stage centrifugal pump |
| CN201306289Y (en) * | 2008-11-07 | 2009-09-09 | 李永胜 | High-lift multistage centrifugal pump |
| CN201407181Y (en) * | 2009-04-03 | 2010-02-17 | 湖北三峡泵业有限公司 | Axial force self-balance multi-stage centrifugal pump |
-
2010
- 2010-04-19 CN CN201010151478A patent/CN101818732A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10259799A (en) * | 1997-03-19 | 1998-09-29 | Hitachi Ltd | Centrifugal pump |
| CN2419393Y (en) * | 2000-05-16 | 2001-02-14 | 沈阳化工泵制造厂 | First stage separate double sucking impeller for multi-stage centrifugal pump |
| CN201306289Y (en) * | 2008-11-07 | 2009-09-09 | 李永胜 | High-lift multistage centrifugal pump |
| CN201407181Y (en) * | 2009-04-03 | 2010-02-17 | 湖北三峡泵业有限公司 | Axial force self-balance multi-stage centrifugal pump |
Non-Patent Citations (1)
| Title |
|---|
| 许德忠: "CPR1000MW核电上充泵介绍", 《水泵技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606506A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Stator component of charging pump for nuclear power station |
| CN102606484A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Charging pump for nuclear power station |
| WO2013143446A1 (en) * | 2012-03-27 | 2013-10-03 | 上海阿波罗机械股份有限公司 | Charging pump for nuclear power plant |
| CN105195989A (en) * | 2015-09-28 | 2015-12-30 | 安泰科技股份有限公司 | Method for manufacturing thrust disc of main pump in nuclear power plant |
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| PB01 | Publication | ||
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Application publication date: 20100901 |