CN101818734A - Charging pump with segmental internal shell for use in nuclear power plant - Google Patents
Charging pump with segmental internal shell for use in nuclear power plant Download PDFInfo
- Publication number
- CN101818734A CN101818734A CN201010151633A CN201010151633A CN101818734A CN 101818734 A CN101818734 A CN 101818734A CN 201010151633 A CN201010151633 A CN 201010151633A CN 201010151633 A CN201010151633 A CN 201010151633A CN 101818734 A CN101818734 A CN 101818734A
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- Prior art keywords
- pump
- internal shell
- reactor
- nuclear power
- charging pump
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Abstract
The invention relates to a centrifugal charging pump with a middle-open internal shell. When a reactor operates normally, the pump operates under a charging operating condition to provide boric acid-containing charged water for a loop, and meanwhile a primary pump provides seal water for mechanical seal; and when the primary loop of the reactor has water loss accidents such as cracking, the charging pump operates under a high-pressure safe injection operating condition to inject water in the reactor to prevent the accidents from going more serious and ensure the safety of the reactor. A charging pump with a segmental internal shell for use in a nuclear power plant consists of an external shell, a pump shaft, a segmental internal shell component, a shaft collar, water inlet and outlet end caps, two end bearing parts, a base and corresponding connecting pipes. The centrifugal charging pump with the middle-open internal shell has the advantages that: the design is reasonable; the thermal shock resistance is high; and the design hydraulic power and design strength meet the requirements of the chemical and volume control system of the nuclear power plant completely.
Description
Technical field
Patent design field of fluid machinery of the present invention, a kind of charging pump with segmental internal shell for use in nuclear power plant.
Background technique
Pressurized-water reactor nuclear power plant is the nuclear reaction power station of relatively extensively adopting at present, on fill the capital equipment that pump is nuclear power station one a loop loop cvcs.When normal reactor operation, this pump moves last filling under the operating mode, for a loop provides water-filling on the boronic acid containing, provides the axle water shutoff of mechanical seal simultaneously for main pump; When reactor main circuit takes place as loss of-coolant accident (LOCA)s such as cuts, on fill pump and under the high-pressure safety injection operating mode, move, water filling is guaranteed reactor safety to prevent the further expansion of accident in reactor.
The pump work temperature is 7 ℃～120 ℃, requires pump can bear instantaneous 7 ℃ to 120 ℃ thermal shock, also can bear in 6 hours temperature and drop to 60 ℃ of cooling thermal shocks by 120 ℃.
Existing general service pump is in rigidity, intensity, heat shock resistance, the impurity of anti-working medium the and sealability, and the material behavior aspect all can't satisfy the requirement of nuclear power station cvcs and high-pressure safety injection system.
Summary of the invention
Technical problem to be solved by this invention is, according to a kind of charging pump with segmental internal shell for use in nuclear power plant of the needs of nuclear power station cvcs.
In order to address the above problem, technological scheme of the present invention is such:
A kind of charging pump with segmental internal shell for use in nuclear power plant is by frame, pump shaft, sectional type inner housing assembly, axle bumper, water inlet and outlet end cap, bearings at both ends parts, base and corresponding connecting pipeline are formed, it is characterized in that filling pump on described is the stage multistage centrifugal pump of inner housing.
Affiliated sectional type inner housing assembly is to be cast into one by guide vane and return guide vane, connects as one structure by the rod bolt.
Affiliated axle bumper is fixed on the pump shaft, and the outstanding end face of left end and back shroud joins, and has end and back shroud vertical plane to join.
Affiliated axle bumper is made up of at least two semicircular ring structures.
Description of drawings
Come detailed description the present invention below in conjunction with the drawings and specific embodiments;
Fig. 1 is the structural representation of a kind of charging pump with segmental internal shell for use in nuclear power plant of the present invention;
Fig. 2 is a stage inner housing assembly schematic representation;
Fig. 3 is the axle bumper structural representation.
Among the figure: 1. radial thrust bearing, 2. pump shaft, 3 outlet, 4. impeller, 5. back shroud, 6. sectional type inner housings, 7. front shroud, 8. import, 9. axle bumper, 10. choma, 11. framies, 12. rod bolts, 13. build 14. bearings, 15. guide vanes, 16. return guide vanes, 17. semicircular ring.
Embodiment
For the technological means that the present invention is realized, character of innovation, achieve the goal and effect is easy to understand, below in conjunction with concrete diagram, further the invention described above.
On to fill pump be one of capital equipment of nuclear power station one loop loop cvcs, its function is as follows:
When normal reactor operation, this pump moves last filling under the operating mode, for a loop provides water-filling on the boronic acid containing, provides the axle water shutoff of mechanical seal simultaneously for main pump.
When reactor main circuit takes place as loss of-coolant accident (LOCA)s such as cuts, on fill pump and under the high-pressure safety injection operating mode, move, water filling is guaranteed reactor safety to prevent the further expansion of accident in reactor.
Environmental conditions
Ambient temperature: 5～50 ℃;
External pressure: 0.01Mpa (definitely);
Relative moisture :≤80%;
Accumulative total radioactive dosage (40 years): 2 * 104Gy.
Be with radioactive deionized water, wherein:
Boron content is (during nominal situation): 2000ppm;
NaOH content:＜0.8%;
Medium proportion: 1000Kg/m
3
Flow lift
Close dead point lift: 1860m
On design discharge: 34m when filling
3/ h
On rated lift: 1802m when filling
Design discharge during high-pressure safety injection: 148m
3/ h
Rated lift during high-pressure safety injection: 810m
(free from admixture moves more than 3 hours continuously);
Medium work Maximum operating temperature: 120 ℃;
Revolution speed: 4500r/min.
The structure explanation
As shown in Figure 1, charging pump with segmental internal shell for use is by impeller (4), front shroud (7), back shroud (5), frame (11), pump shaft (2), sectional type inner housing (6), axle bumper (9), choma (10), and base (14) and corresponding connecting pipeline are formed.
As shown in Figure 2, be cast in the sectional type inner housing (6) of one by guide vane (15) and return guide vane (16), there is a penetration hole inside, connects as one by rod bolt (12), and bottom surfaces and choma (10) face joins, and the installation aspect is quick.The pump leg is a welded structure, and the cylindrical shell leg is fixed on the bearing (14) with bolt, spring ring, pump pin spacer sleeve.
As shown in Figure 3, axle bumper (9) is fixed on the pump shaft (2), and the outstanding end face of left side and back shroud (5) joins, and have end face and back shroud (5) vertical plane to join, and at least two semicircular ring (17) structure is formed.
Claims (4)
1. a charging pump with segmental internal shell for use in nuclear power plant is to be by impeller (4), front shroud (7), back shroud (5), frame (11), pump shaft (2), sectional type inner housing (6), axle bumper (9), choma (10) by charging pump with segmental internal shell for use, base (14) and corresponding connecting pipeline are formed, it is characterized in that filling pump on described is sectional type inner housing multistage centrifugal pump.
2. according to claim 1, it is characterized in that described sectional type inner housing is made up of guide vane (15) and return guide vane (16) and is cast in one, inside has one to run through empty, connect as one by rod bolt (12), bottom surfaces and choma (10) face joins, and the installation aspect is quick.
3. according to claim 1, it is characterized in that described axle bumper (9) is fixed on the pump shaft (2), the outstanding end face of left end and back shroud (5) joins, and has end and back shroud (5) vertical plane to join.
4. according to claim 2, it is characterized in that described axle bumper (9) and at least two semicircular ring (17) structure are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010151633A CN101818734A (en) | 2010-04-19 | 2010-04-19 | Charging pump with segmental internal shell for use in nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010151633A CN101818734A (en) | 2010-04-19 | 2010-04-19 | Charging pump with segmental internal shell for use in nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101818734A true CN101818734A (en) | 2010-09-01 |
Family
ID=42653956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010151633A Pending CN101818734A (en) | 2010-04-19 | 2010-04-19 | Charging pump with segmental internal shell for use in nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101818734A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103398012A (en) * | 2013-08-15 | 2013-11-20 | 沈阳三科水力机械制造有限公司 | Start-stop water feeding pump of nuclear power station |
| CN108730196A (en) * | 2018-08-07 | 2018-11-02 | 安德里茨（中国）有限公司 | Sectional type multi-stage pump |
-
2010
- 2010-04-19 CN CN201010151633A patent/CN101818734A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103398012A (en) * | 2013-08-15 | 2013-11-20 | 沈阳三科水力机械制造有限公司 | Start-stop water feeding pump of nuclear power station |
| CN103398012B (en) * | 2013-08-15 | 2015-12-23 | 沈阳三科水力机械制造有限公司 | Nuclear power station start and stop feed water pump |
| CN108730196A (en) * | 2018-08-07 | 2018-11-02 | 安德里茨（中国）有限公司 | Sectional type multi-stage pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100901 |