CN101818733A - Internal shell split centrifugal charging pump - Google Patents
Internal shell split centrifugal charging pump Download PDFInfo
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- CN101818733A CN101818733A CN201010151620A CN201010151620A CN101818733A CN 101818733 A CN101818733 A CN 101818733A CN 201010151620 A CN201010151620 A CN 201010151620A CN 201010151620 A CN201010151620 A CN 201010151620A CN 101818733 A CN101818733 A CN 101818733A
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- inner housing
- centrifugal
- open type
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Abstract
The invention relates to an internal shell split centrifugal charging pump. When a reactor runs normally, the pump runs under a charging working condition to provide boric acid-containing charging water for a loop and provide shaft seal water for mechanical seal for a main pump; and when coolant loss accidents such as breakage and the like occur in the main loop of the reactor, the charging pump runs under a high-pressure safety injection working condition and injects water to the reactor to prevent the accident from further expanding and ensure the safety of the reactor. The internal shell split centrifugal charging pump mainly comprises an external cylinder body, an internal shell, a water inlet pipeline, a water outlet pipeline, a bracket part, a left-side end cover, a right-side end cover, an intermediate bearing, a shaft, an impeller, a first double suction impeller, a guide vane, a middle flow channel, a final water outlet flow channel, an axle bumper, a left-end double seal ring structure, a right-end seal structure and the like. The internal shell split centrifugal charging pump is reasonable in design and high in thermal shock resistance and completely meets the requirements of a nuclear power station chemical and volume control system in hydraulic design and strength design.
Description
Technical field
The present invention relates to fluid machinery, concrete relate to a kind of inner housing middle open type and fill pump on centrifugal.
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, provides a kind of inner housing middle open type to fill pump on centrifugal according to the needs of nuclear power station cvcs.
The technological scheme that realizes above-mentioned purpose is:
Fill pump on a kind of inner housing middle open type is centrifugal, form by outer cylinder body, inner housing, inlet pipeline, rising pipe, carriage member, left side end cap, right side end cap, intermediate bearing, axle, impeller, first-stage double-absorption impeller, stator, intermediate flow channel, final stage outlet passage, axle bumper, left end double seal ring structure, right-hand member sealing configuration etc., it is characterized in that, filling pump on described a kind of inner housing middle open type is centrifugal is horizontal bivalve body multistage centrifugal pump, the import and export horizontal radial of pump.
Described carriage member comprises left end sliding bearing, right-hand member sliding bearing and rolling bearing composition, and described bearing is lubricated by two oil return lines.
Described inner housing is opened in being, is made of two halves up and down, forms one by bolt.
Described intermediate bearing is a water lubriucated bearing, is made of axle sleeve, bearing shell, and bearing shell is provided with two water inlet flow channels, tapping hole, two backwater runners.
Described axle bumper is made of ring more than two, so that snap on the axle when installing.
Open form formula during described stator adopts, stator is provided with the convexity plate, matches fixed guide vane with the inner housing Baltimore groove.
The backwater runner is a double flow channel in the middle of described, open form formula in the employing, and inner housing respectively has half runner in the two halves housing up and down, forms intermediate flow channel when inner housing is installed simultaneously.
Described final stage outlet passage is in the inside of half inner housing.
Described left end double seal ring structure has a pair of toothing, two seal rings.
Beneficial effect, it is reasonable in design to fill pump on a kind of inner housing middle open type of the present invention is centrifugal, and resistance to sudden heating is good, and waterpower design, Intensity Design satisfy the requirement of nuclear power station cvcs fully.
Description of drawings
Fig. 1 fills the pump structure schematic representation for a kind of inner housing middle open type among the embodiment on centrifugal;
Fig. 2 is a left end double seal ring structural representation between inner and outer shell among Fig. 1;
Fig. 3 is the structural representation of impeller and stator among Fig. 1;
Fig. 4 is an intermediate bearing structural representation among Fig. 1.
Among the figure: 1. spool, 2. left side end cap, 3. in the middle of backwater runner, 4. stator, 5. final stage outlet passage, 6. rising pipe, 7. impeller, 8. first-stage double-absorption impeller, 9. right side end cap, 10. right-hand member sliding bearing, 11. rolling bearings, 12. mechanical seal, 13. bolts, 14. inlet pipelines, 15. the right-hand member sealing configuration, 16. intermediate bearings, 17. inner housings, 18. outer cylinder body, 19. left end double seal ring structures, 20. carriage members, 21. the left end sliding bearing, 22. convex plates, 23. axle bumpers, 24. seal ring, 25. bidentate structures, 26. top water inlet flow channels, 27. bearing shell, 28. top backwater runners, 29. bottom backwater runners, 30. axle sleeve, 31. bottom water inlet flow channels, 32. tapping holes.
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.
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, filling pump on is made up of outer cylinder body (18), inner housing (17), inlet pipeline (14), rising pipe (6), carriage member (20), left side end cap (2), right side end cap (9), intermediate bearing (16), axle (1), impeller (7), first-stage double-absorption impeller (8), stator (4), middle backwater runner (3), final stage outlet passage (5), axle bumper (23), left end double seal ring structure (19), right-hand member sealing configuration (15) etc.Inner housing (17) is middle open form formula; Middle backwater runner (3) is an open form formula in the double flow channel, and the median surface of simultaneously middle backwater runner (3) runner is arranged in out on the face, and inner housing (17) respectively has half runner in the two halves housing up and down; In the inner housing (17) opened form complete middle backwater runner (3) when being connected and fixed by bolt (13).Left end double seal ring structure (19) and right-hand member sealing configuration (15) are arranged between inner housing (17) and the outer cylinder body (18); left end double seal ring structure (19) prevents that the high pressure water between inner housing (17) and the outer cylinder body (18) from entering mechanical seal (12) section; to mechanical seal (12) protective action, right-hand member sealing configuration (15) avoids high pressure water to enter in the inlet pipeline (14).Final stage outlet passage (5) is in the inside of inner housing (17), and rising pipe (6) leads.Carriage member (20) is made up of left end sliding bearing (21), right-hand member sliding bearing (10), rolling bearing (11), and left and right sides step bearing has oil lubrication system separately.
As shown in Figure 2, the sealing configuration of left end (19) is a pair of toothing (25), and a seal ring (24) is arranged in each tooth, and structural design improves sealing effect.
As shown in Figure 3, axle bumper (23) is that ring constitutes more than two, snaps in the axial trough during convenient the installation, and axle bumper (23) is the effect of impeller (7) fixedly; Stator (4) is middle open form formula, and stator (4) is fixed on the inner housing (17) by the convex plate (22) on stator top; Impeller (7) is fixed by axle bumper (23) and key.
As shown in Figure 4, intermediate bearing (16) is a water lubriucated bearing, is made of axle sleeve (30), bearing shell (27), and bearing shell (27) is provided with two water inlet flow channels and two backwater runners, and axle sleeve (30) is fixed on the axle (1).During work, the impeller high pressure water enters in the bearing by top water inlet flow channel (26) and (31) two water inlet flow channels of bottom water inlet flow channel, top water inlet flow channel (26) is divided into two-way by tapping hole (32), enter in the low pressure impeller by top backwater runner (28), bottom backwater runner (29) respectively, the lubricated end face at two places is lubricated; Bottom water inlet flow channel (31) directly links to each other with top backwater runner (28), forms lubricated.
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 (11)
1. an inner housing middle open type fills pump on centrifugal, comprise outer cylinder body (18), inner housing (17), inlet pipeline (14), rising pipe (6), carriage member (20), left side end cap (2), right side end cap (9), intermediate bearing (16), axle (1), impeller (7), first-stage double-absorption impeller (8), stator (4), middle backwater runner (3), final stage outlet passage (5), axle bumper (23), left end double seal ring structure (19), right-hand member sealing configuration compositions such as (15), it is characterized in that: filling pump on a kind of inner housing middle open type is centrifugal is horizontal bivalve body multistage centrifugal pump, the import and export horizontal radial of pump.
2. fill pump according to the described a kind of inner housing middle open type of claim 1 on centrifugal, it is characterized in that: carriage member (20) is made up of left end sliding bearing (21), right-hand member sliding bearing (10), rolling bearing (11), and left and right sides step bearing has oil lubrication system separately.
3. fill pump according to the described a kind of inner housing middle open type of claim 1 on centrifugal, it is characterized in that: inner housing (14) is opened in being, is made of two halves up and down, by the fixing one of forming of bolt (13).
4. fill pump according to the described a kind of inner housing middle open type of claim 1 on centrifugal, it is characterized in that: intermediate bearing (16) is a water lubriucated bearing.
5. fill pump according to the described a kind of inner housing middle open type of claim 4 on centrifugal, it is characterized in that: water lubriucated bearing is made of axle sleeve (30), bearing shell (27), and bearing shell (27) is provided with top water inlet flow channel (26), bottom water inlet flow channel (31), tapping hole (32), top backwater runner (28), bottom backwater runner (29).
6. fill pump according to the described a kind of inner housing middle open type of claim 1 on centrifugal, it is characterized in that: axle bumper (23) is made of ring more than two, so that snap on the axle when installing.
7. fill pump according to the described a kind of inner housing middle open type of claim 1 on centrifugal, it is characterized in that: open form formula during stator (4) adopts.
8. fill pump according to the described a kind of inner housing middle open type of claim 7 on centrifugal, it is characterized in that: stator (4) is provided with convexity plate (22), matches fixed guide vane (4) with inner housing (17) Baltimore groove.
9. fill pump according to the described a kind of inner housing middle open type of claim 1 on centrifugal, it is characterized in that: middle backwater runner (3) is a double flow channel, open form formula in the employing, inner housing respectively has half runner in the two halves housing up and down, backwater runner (3) in the middle of forming simultaneously when inner housing (17) is installed.
10. fill pump according to the described a kind of inner housing middle open type of claim 1 on centrifugal, it is characterized in that: final stage outlet passage (5) is in the inside of half inner housing (17).
11. fill pump according to the described a kind of inner housing middle open type of claim 1 on centrifugal, it is characterized in that: left end double seal ring structure (19) adopts bidentate structure (25), and two seal rings (24) are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010151620A CN101818733A (en) | 2010-04-19 | 2010-04-19 | Internal shell split centrifugal charging pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010151620A CN101818733A (en) | 2010-04-19 | 2010-04-19 | Internal shell split centrifugal charging pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101818733A true CN101818733A (en) | 2010-09-01 |
Family
ID=42653955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010151620A Pending CN101818733A (en) | 2010-04-19 | 2010-04-19 | Internal shell split centrifugal charging pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101818733A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338126A (en) * | 2011-08-06 | 2012-02-01 | 河南兴发精细化工有限公司 | Application of deionized water in cooling chemical pump machine seal |
| 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 |
| CN102828959A (en) * | 2012-09-18 | 2012-12-19 | 南方泵业股份有限公司 | Double-suction multistage horizontal type horizontal split pump |
| CN102828960A (en) * | 2012-09-18 | 2012-12-19 | 南方泵业股份有限公司 | Double suction multistage horizontal split pump |
| CN103306986A (en) * | 2012-03-05 | 2013-09-18 | 株式会社荏原制作所 | Multi-stage pump |
| GB2511476A (en) * | 2012-12-07 | 2014-09-10 | Thomas Andreas Guenther | Device and system for hydrocarbon conversion |
| CN107850075A (en) * | 2015-08-10 | 2018-03-27 | 诺沃皮尼奥内技术股份有限公司 | Centrifugal pump |
-
2010
- 2010-04-19 CN CN201010151620A patent/CN101818733A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338126A (en) * | 2011-08-06 | 2012-02-01 | 河南兴发精细化工有限公司 | Application of deionized water in cooling chemical pump machine seal |
| CN103306986A (en) * | 2012-03-05 | 2013-09-18 | 株式会社荏原制作所 | Multi-stage pump |
| 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 |
| CN102828959A (en) * | 2012-09-18 | 2012-12-19 | 南方泵业股份有限公司 | Double-suction multistage horizontal type horizontal split pump |
| CN102828960A (en) * | 2012-09-18 | 2012-12-19 | 南方泵业股份有限公司 | Double suction multistage horizontal split pump |
| CN102828959B (en) * | 2012-09-18 | 2014-12-03 | 南方泵业股份有限公司 | Double-suction multistage horizontal type horizontal split pump |
| GB2511476A (en) * | 2012-12-07 | 2014-09-10 | Thomas Andreas Guenther | Device and system for hydrocarbon conversion |
| CN107850075A (en) * | 2015-08-10 | 2018-03-27 | 诺沃皮尼奥内技术股份有限公司 | Centrifugal pump |
| US11555496B2 (en) | 2015-08-10 | 2023-01-17 | Nuovo Pignone Tecnologie Srl | Centrifugal 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 |