CN202125457U - Impeller for million-kilowatt nuclear secondary containment vessel spray pump - Google Patents
Impeller for million-kilowatt nuclear secondary containment vessel spray pump Download PDFInfo
- Publication number
- CN202125457U CN202125457U CN2011200776813U CN201120077681U CN202125457U CN 202125457 U CN202125457 U CN 202125457U CN 2011200776813 U CN2011200776813 U CN 2011200776813U CN 201120077681 U CN201120077681 U CN 201120077681U CN 202125457 U CN202125457 U CN 202125457U
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- CN
- China
- Prior art keywords
- impeller
- spray pump
- cover plate
- containment vessel
- rear cover
- 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
An impeller for a million-kilowatt nuclear secondary containment vessel spray pump is arranged inside a containment vessel spray pump casing and fixed on a containment vessel spray pump shaft. The impeller is formed by a front cover plate, a rear cover plate and a middle blade, the front cover plate is provided with a seal ring, the rear cover plate of the impeller is provided with a seal ring, and the lower portion of the rear cover plate is provided with a balanced hole. The front cover plate and the rear cover plate of the impeller are both provided with seal rings, and the lower portion of the rear cover plate is provided with the hole simultaneously so as to reduce axial force exerted on the rear cover plate and achieve the effect of balancing part of the axial force. The waterpower of the impeller can meet the requirements of three working condition points of the containment vessel spray pump, the cavitation remains are few, and the efficiency is high.
Description
Technical field
The utility model relates to a kind of impeller, and concrete a kind of gigawatt that relates to is examined secondary container spray pump impeller.
Background technique
Along with the continuous progress of science and technology, for the needs that use clean energy resource, and to the worry of climatic change and energy security; More and more countries begins to consider nuclear energy power generation; Pressurized-water reactor nuclear power plant is that what relatively extensively to adopt at present is pressurized-water reactor nuclear power plant, and its major character is that water does not seethe with excitement in reactor core, therefore must keep high pressure conditions; And overcritical, ultra supercritical generator set become abroad, especially the main force of developed country unit.
Nuclear island of nuclear power station mainly comprises nuclear steam supply system, containment spray system and auxiliary system.Wherein the containment spray system containment has the meaning of particular importance for nuclear plant safety; It is to stop from the fission product of fuel and last one barrier of a loop radioactive material entering environment, is made up of equipment such as spray pump, cooler, shower nozzle, material-changing water tank, valves.When taking place under the accident conditions of breaking in loss of-coolant accident (LOCA) or containment internal steam pipe road, the steam of high temperature, high pressure blows out, and makes the rising of containment internal pressure and temperature.The function of safety shower system is exactly through spray condensing steam, makes containment internal pressure and temperature be reduced to the acceptable level, guarantees the integrity of containment.
At present, the complete dependence on import of China's gigawatt nuclear secondary containment spray pump is carried out blockade on new techniques in key technologies such as its multi-operating mode waterpower designing techniques to China abroad.
The model utility content
The utility model is to above-mentioned present situation, and purpose is to develop the outstanding gigawatt nuclear secondary container spray pump impeller of hydraulic performance, and can satisfy three operating point requirements of spray pump, and is efficient, net positive suction head is low.
For solving the problems of the technologies described above; The technological scheme of the utility model is following: a kind of gigawatt nuclear secondary container spray pump impeller is arranged on the containment spray pump enclosure interior, and is fixed on the container spray pump shaft; Impeller is made up of front shroud, back shroud and middle blade; Front shroud is provided with seal ring, and back shroud of impeller is provided with seal ring, is provided with equalizing orifice in the back shroud bottom.
Said impeller is all set up seal ring on forward and backward cover plate, simultaneously in the perforate of back shroud bottom, act on the axial force on the back shroud with minimizing, reaches the effect of balance portion axial force.The impeller hydraulic energy satisfies three operating point requirements of containment spray pump, and net positive suction head is low, and efficient is high.
Description of drawings
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
Fig. 1 is the utility model gigawatt nuclear secondary containment spray pump blade wheel structure schematic representation.
Among the figure, 1 for front shroud, 2 for back shroud, 3 for blade, 4 for the back shroud of impeller seal ring, 5 for the impeller keyway, 6 for impeller wear axle place, 7 for equalizing orifice, 8 be the front shroud of impeller seal ring.
Embodiment
Like Fig. 1, shown in Figure 2; A kind of gigawatt nuclear secondary container spray pump impeller is arranged on the containment spray pump enclosure interior, and is fixed on the container spray pump shaft; Impeller is made up of front shroud 1, back shroud 2 and middle blade 3; Front shroud 1 is provided with front shroud of impeller seal ring 8, and back shroud 2 is provided with back shroud of impeller seal ring 4, is provided with equalizing orifice 7 in back shroud 2 bottoms.Impeller is worn axle place 6 through impeller keyway 5, impeller and is fixedly connected on the axle.Back shroud of impeller seal ring 4 can reduce to act on the axial force on the back shroud 2 with equalizing orifice 7, because flow of liquid through the drag losses of sealing ring gap, makes the fluid pressure of sealed lower portion descend, the degree that reduces axial force depends on and the quantity in hole and the size in aperture.The quantity of equalizing orifice 7 is consistent with the quantity of blade 3.The spray pump impeller adopts casting, and is anticorrosion, wear-resisting property good, and efficient is high.
Claims (1)
1. a gigawatt is examined secondary container spray pump impeller; Be arranged on the containment spray pump enclosure interior; And be fixed on the container spray pump shaft, it is characterized in that: impeller is made up of front shroud (1), back shroud (2) and middle blade (3), and front shroud (1) is provided with seal ring (8); Back shroud of impeller (2) is provided with seal ring (4), is provided with equalizing orifice (7) in back shroud (2) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200776813U CN202125457U (en) | 2011-03-23 | 2011-03-23 | Impeller for million-kilowatt nuclear secondary containment vessel spray pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200776813U CN202125457U (en) | 2011-03-23 | 2011-03-23 | Impeller for million-kilowatt nuclear secondary containment vessel spray pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202125457U true CN202125457U (en) | 2012-01-25 |
Family
ID=45488525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200776813U Expired - Fee Related CN202125457U (en) | 2011-03-23 | 2011-03-23 | Impeller for million-kilowatt nuclear secondary containment vessel spray pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202125457U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161753A (en) * | 2013-04-12 | 2013-06-19 | 上海阿波罗机械股份有限公司 | Impeller for residual heat removal pump |
| CN103195738A (en) * | 2013-04-12 | 2013-07-10 | 上海阿波罗机械股份有限公司 | Residual heat removal pump |
-
2011
- 2011-03-23 CN CN2011200776813U patent/CN202125457U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161753A (en) * | 2013-04-12 | 2013-06-19 | 上海阿波罗机械股份有限公司 | Impeller for residual heat removal pump |
| CN103195738A (en) * | 2013-04-12 | 2013-07-10 | 上海阿波罗机械股份有限公司 | Residual heat removal pump |
| CN103195738B (en) * | 2013-04-12 | 2015-09-09 | 上海阿波罗机械股份有限公司 | A kind of residual heat removal pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120125 Termination date: 20130323 |