DK147923B - INPUT BEND FOR CENTRIFUGAL PUMPS - Google Patents
INPUT BEND FOR CENTRIFUGAL PUMPS Download PDFInfo
- Publication number
- DK147923B DK147923B DK331880AA DK331880A DK147923B DK 147923 B DK147923 B DK 147923B DK 331880A A DK331880A A DK 331880AA DK 331880 A DK331880 A DK 331880A DK 147923 B DK147923 B DK 147923B
- Authority
- DK
- Denmark
- Prior art keywords
- impeller
- centrifugal pumps
- guide ribs
- input bend
- bend
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/10—Stators
- F05B2240/12—Fluid guiding means, e.g. vanes
- F05B2240/121—Baffles or ribs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
147923 i147923 i
Opfindelsen angår en indløbsbøjning til centrifugalpumper med parallelt med strømningen forløbende lederibber, der er ført frem foran løbehjulet.The invention relates to an inlet bend for centrifugal pumps with guide ribs extending parallel to the flow, which are advanced in front of the impeller.
Indløbsbøjninger anvendes sædvanligvis foran 5 vertikalt opstillede centrifugalpumper som f.eks. kølevandpumper til kraftværker. Det indsugede vand afbøjes og accelereres i indløbsbøjningen, men skal strømme så vidt muligt uden forstyrrelser til løbehjulet og ikke have nogen forrotation. Dette søges opnået ved hjælp af 10 lederibber. Under drift med delbelastning vil sådanne lederibber imidlertid afbøje de fra løbehjulet udtrædende delbelastningshvirvler på en sådan måde, at der opstår betydelige kavitationsbeskadigelser af løbehjulet og af lederibbeme selv.Inlet bends are usually used in front of 5 vertically positioned centrifugal pumps, e.g. cooling water pumps for power plants. The suction water is deflected and accelerated in the inlet bend, but must flow as far as possible without disturbance to the impeller and have no pre-rotation. This is sought to be achieved by means of 10 guide ribs. However, during partial load operation, such guide ribs will deflect the partial load swirls emerging from the impeller in such a manner that substantial cavitation damage occurs to the impeller and the guide ribs themselves.
15 Opfindelsen har til opgave at forbedre en ind løbsbøjning af den angivne art på en sådan måde, at løbehjulets NPSH. og dermed kavitationsbeskadigelser af løbehjulet og af lederibberne formindskes væsentligt, medens lederibbernes strømningsstabiliserende 20 virkning bevares.The object of the invention is to improve inlet bending of the specified type in such a way that the impeller's NPSH. and thus, cavitation damage of the impeller and of the guide ribbons is substantially diminished while maintaining the flow stabilizing effect of the guide ribbons.
Løsningen af denne opgave består ifølge opfindelsen i, at lederibberne ved indløbsbøjningens periferi har udsparinger, der strækker sig helt frem til løbehjulet således, at lederibberne kun er ført frem til 25 løbehjulet ved dettes nav. Den under delbelastning af centrifugalpumpen opståede delbelastningshvirvel kan således træde uhindret ud af løbehjulet og ind i det i strømningsretningen foran dette liggende rum. Som følge af udsparingerne i lederibberne forbliver hvirv-30 len upåvirket. Først ved større udstrækning og betydeligt energitab rammer denne hvirvel de resterende fulde lederibber og afbremses af disse. Da strømningsafbøjningen finder sted langt foran løbehjulet, sker der heller ikke nogen påvirkning af strømningen ud for lø-The solution of this task according to the invention consists in that the guide ribs at the periphery of the inlet bend have recesses extending all the way to the impeller such that the guide ribs are only advanced to the impeller at its hub. Thus, the partial load swirl that occurs during partial loading of the centrifugal pump can step out of the impeller unobstructed and into the flow direction in front of this space. As a result of the recesses in the guide ribs, the vortex remains unaffected. Only at greater extents and significant energy losses does this vortex hit the remaining full conductor ribs and are slowed down by these. Since the flow deflection takes place far in front of the impeller, there is also no influence on the flow outside the impeller.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2933904 | 1979-08-22 | ||
| DE2933904A DE2933904C2 (en) | 1979-08-22 | 1979-08-22 | Inlet elbow |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK331880A DK331880A (en) | 1981-02-23 |
| DK147923B true DK147923B (en) | 1985-01-07 |
| DK147923C DK147923C (en) | 1985-07-01 |
Family
ID=6078993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK331880A DK147923C (en) | 1979-08-22 | 1980-08-01 | INPUT BEND FOR CENTRIFUGAL PUMPS |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5657000A (en) |
| BR (1) | BR8005223A (en) |
| DE (1) | DE2933904C2 (en) |
| DK (1) | DK147923C (en) |
| FR (1) | FR2463866A1 (en) |
| GB (1) | GB2057569B (en) |
| NL (1) | NL181884C (en) |
| NO (1) | NO151336C (en) |
| SE (1) | SE443407B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4721435A (en) * | 1986-04-30 | 1988-01-26 | Borg-Warner Industrial Products | Fluid flow control means for pumps and the like |
| DE3640894C2 (en) * | 1986-11-29 | 1997-05-28 | Klein Schanzlin & Becker Ag | Inlet housing for centrifugal pump |
| DE4340711A1 (en) * | 1993-11-30 | 1995-06-01 | Klein Schanzlin & Becker Ag | Device for preventing underwater vortices at pump inlets |
| DE19510812A1 (en) * | 1995-03-24 | 1996-09-26 | Klein Schanzlin & Becker Ag | Centrifugal pump |
| EP2172654B2 (en) † | 2008-10-01 | 2013-11-20 | Grundfos Management A/S | Centrifugal pump assembly |
| WO2011080974A1 (en) * | 2009-12-29 | 2011-07-07 | 川崎重工業株式会社 | Supercharger intake duct |
| DE102011116904A1 (en) * | 2011-10-25 | 2013-04-25 | Wilo Se | Multi-stage centrifugal pump |
| RU2491449C1 (en) * | 2012-03-14 | 2013-08-27 | Федеральное государственное унитарное предприятие "Государственный космический научно-производственный центр имени М.В. Хруничева" | Pump |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2875696A (en) * | 1951-12-05 | 1959-03-03 | Zborowski Helmut Ph G A R Von | Centrifugal pumps, in particular for feeding fuel to fuel injection engines |
| DE1528691A1 (en) * | 1966-03-05 | 1969-07-10 | Neyrpic Ets | Centrifugal pump intake manifold |
| AT307237B (en) * | 1969-07-31 | 1973-05-10 | Worthington Corp | Centrifugal pump with coaxial inlet channel |
-
1979
- 1979-08-22 DE DE2933904A patent/DE2933904C2/en not_active Expired
-
1980
- 1980-07-29 JP JP10422280A patent/JPS5657000A/en active Pending
- 1980-08-01 DK DK331880A patent/DK147923C/en not_active IP Right Cessation
- 1980-08-08 NL NLAANVRAGE8004533,A patent/NL181884C/en not_active IP Right Cessation
- 1980-08-12 FR FR8017756A patent/FR2463866A1/en active Granted
- 1980-08-15 SE SE8005754A patent/SE443407B/en not_active IP Right Cessation
- 1980-08-18 BR BR8005223A patent/BR8005223A/en unknown
- 1980-08-19 NO NO802465A patent/NO151336C/en unknown
- 1980-08-21 GB GB8027248A patent/GB2057569B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2933904A1 (en) | 1981-03-12 |
| SE443407B (en) | 1986-02-24 |
| NO151336C (en) | 1985-03-20 |
| NL181884C (en) | 1987-11-16 |
| DE2933904C2 (en) | 1985-03-14 |
| DK147923C (en) | 1985-07-01 |
| GB2057569B (en) | 1983-10-12 |
| NO151336B (en) | 1984-12-10 |
| DK331880A (en) | 1981-02-23 |
| FR2463866A1 (en) | 1981-02-27 |
| GB2057569A (en) | 1981-04-01 |
| NL8004533A (en) | 1981-02-24 |
| JPS5657000A (en) | 1981-05-19 |
| FR2463866B1 (en) | 1984-04-20 |
| NL181884B (en) | 1987-06-16 |
| NO802465L (en) | 1981-02-23 |
| SE8005754L (en) | 1981-02-23 |
| BR8005223A (en) | 1981-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |