WO2000066893A1 - Open impeller for centrifugal pumps - Google Patents
Open impeller for centrifugal pumps Download PDFInfo
- Publication number
- WO2000066893A1 WO2000066893A1 PCT/DE2000/001264 DE0001264W WO0066893A1 WO 2000066893 A1 WO2000066893 A1 WO 2000066893A1 DE 0001264 W DE0001264 W DE 0001264W WO 0066893 A1 WO0066893 A1 WO 0066893A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- web plate
- open impeller
- blade
- impeller according
- blade elements
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
Definitions
- the present invention relates to an open impeller for a centrifugal pump or the like. , With a hub part, in which a central hub bore is formed, and with a first blade element, which are connected on the hub side to the hub part.
- Such an impeller is e.g. B. from DE 44 24 996 AI known.
- the open design of such an impeller is primarily inexpensive and also leads to better accessibility, e.g. B. for the purpose of cleaning, machining or the like.
- the hydraulic efficiency of such an open impeller is worse than in the case of a closed impeller due to the gap loss resulting from the pressure difference between the front side of the blade and the rear side of the blade.
- the object of the present invention is therefore to create an open impeller for a centrifugal pump which acts like a closed impeller.
- the object is achieved in that a central web plate is provided, on which blade elements are supported on both sides.
- the open impeller acts like a closed impeller at a pressure height of ⁇ 10m.
- the suction effect takes place on both sides of the center web plate, so that there is no one-sided axial thrust.
- the impeller remains an open impeller with the advantages of easy access and inexpensive manufacture mentioned above.
- the cheaper production compared to a closed impeller essentially results from the fact that the Large open impeller can be manufactured in one piece, whereas closed impellers usually require two or more parts.
- central web plate is arranged at a radial distance from the hub part and delimits an annular gap with the hub part. As a result, the liquid to be pumped can easily reach both sides of the center web plate.
- a further advantage according to claim 5 is that a second blade element is provided, which is arranged in each case between two first blade elements of the center web plate and ends on the hub side in front of the annular gap. This improves the number of blades and thus the smooth running.
- Another advantage according to claim 6 is that two first blade elements are arranged on both sides of the central web plate in a mirror-symmetrical manner. This leads to a favorable compensation of the axial thrust on both sides.
- Another advantage according to claim 8 is that the first blade elements are offset from one another in the direction of rotation on both sides of the center web plate. This further improves the smoothness of the movement, since the offset means that the number of blades acting on both sides (number of half blades) increases in the direction of rotation.
- Another advantage according to claim 9 is that the second blade elements are offset from one another in the direction of rotation on both sides of the center web plate. This further improves the smoothness of the operation, since the offset causes the number of blades acting on both sides (number of half blades) to increase in the direction of rotation.
- Another advantage according to claim 10 is that a blade width on a suction side of the center web plate is wider than on a back side of the center web plate opposite the suction side. The axial thrust to the suction side can be determined by the formation of different wide blade elements depending on the side of the center web plate.
- Another advantage according to claim 11 is that the radial expansion of the center web plate is greater than the maximum radial expansion of one of the blade elements. As a result, the impeller behaves aerodynamically.
- Figure 1 is a schematic, perspective view of an impeller of the present invention from a first side. 2 shows a schematic, perspective view of the impeller from FIG. 1;
- FIG. 3 shows a schematic illustration of a detail of the impeller in cross section, according to a second embodiment
- Fig. 4 shows a schematic representation of a further detail of the impeller in cross section, in a third embodiment.
- an impeller 1 is shown from a first and second side. Since both sides are of identical design, the impeller 1 is only described on the basis of one side.
- a hub bore 5 is formed in a hub part 3.
- a central web plate 7 with a first side 7.1 and a second side 7.2 is arranged concentrically and at a radial distance from the hub part 3.
- the center web plate 7 lies on a central plane of the hub part 3, so that an annular gap 9 is formed due to the distance between the two components.
- a group of identically shaped, first blade elements 11 is connected to the hub part 3.
- Each first blade element 11 has the shape of a circular arc section and is arranged at the same distance and in the same orientation to the respectively adjacent blade element 3 around the hub bore 5.
- each first blade element 11 sits on the hub part 3 and is of uniform design over a section in the area of the annular gap 9.
- the first blade element 11 bifurcates and is supported with both fork parts 11.1 and 11.2 on the sides 7.1 and 7.2 of the center wall plate 7.
- the first blade elements 11 end at a peripheral edge of the center web plate 7.
- a second blade element 13 is arranged on each side 7.1 and 7.2 of the center web plate 7. This extends exclusively over the central web plate 7, but not over the annular gap 9 and is also not connected to the hub part 3.
- the second blade element 13 is in the form of a circular arc section with the same orientation as the first blade element 11.
- the radii of curvature of all first and second blade elements 11, 13 are also the same.
- the blade elements 11, 13 or the fork parts 11.1, 11.2 of the first blade elements 11 are arranged on both sides of the center web plate 7 in a mirror-symmetrical manner.
- first and / or second blade elements 11, 13 on one side of the center web plate 7 can also be offset in the direction of rotation of the first and / or second blade elements 11, 13 of the center web plate 7. This results in better running smoothness, since this arrangement corresponds to a total of twice the number of blades.
- the center web plate 7 has a diameter that is larger than the mmaximal radial extent of the first and / or second blade elements 11, 13. This leaves a radial web 15 on the circumference, which separates the tear-off edges of the blade elements 11, 13 on both sides (FIG 3).
- the blade width of a blade element 11, 13 on the suction side A is greater than that of a blade element 11, 13 on the rear side R.
- the axial thrust to the suction side can be regulated (FIG. 4).
- first blade elements 11 can only be arranged on the first side 7.1 of the center web plate 7.
- the second blade elements 13 can then either be arranged only on the second side 7.2 of the center web plate 7 or on both sides 7.1 and 7.2.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00938505A EP1173678A1 (en) | 1999-04-29 | 2000-04-22 | Open impeller for centrifugal pumps |
AU53887/00A AU5388700A (en) | 1999-04-29 | 2000-04-22 | Open impeller for centrifugal pumps |
DE10081167T DE10081167D2 (en) | 1999-04-29 | 2000-04-22 | Open impeller for centrifugal pumps |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19919192.1 | 1999-04-29 | ||
DE1999119192 DE19919192A1 (en) | 1999-04-29 | 1999-04-29 | Open impeller for centrifugal pumps or the like |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000066893A1 true WO2000066893A1 (en) | 2000-11-09 |
Family
ID=7906075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/001264 WO2000066893A1 (en) | 1999-04-29 | 2000-04-22 | Open impeller for centrifugal pumps |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1173678A1 (en) |
AU (1) | AU5388700A (en) |
DE (2) | DE19919192A1 (en) |
WO (1) | WO2000066893A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010110937A1 (en) * | 2009-03-25 | 2010-09-30 | Woodward Governor Company | Centrifugal impeller with controlled force balance |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102042263B (en) * | 2010-12-22 | 2012-08-29 | 中国海洋石油总公司 | Double-disc straight blade impeller for subsea mud lift pump |
CN102297137B (en) * | 2011-07-26 | 2015-11-25 | 中国石油大学(华东) | The discontinuous vane pump of a kind of open type |
CN107795513A (en) * | 2017-12-12 | 2018-03-13 | 无锡市盛源汽车配件厂 | Water-pump impeller of automobile into boom protection is set |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2111441A (en) * | 1935-07-26 | 1938-03-15 | Homer A Thrush | Circulator |
US3246605A (en) * | 1964-03-16 | 1966-04-19 | William L Fisher | Rotary pumps |
US3816020A (en) * | 1972-10-19 | 1974-06-11 | Selgo Pumps Inc | Pump |
US3975113A (en) * | 1974-12-31 | 1976-08-17 | Ogles Ethridge F | Centrifugal pump |
US4589822A (en) * | 1984-07-09 | 1986-05-20 | Mici Limited Partnership Iv | Centrifugal blood pump with impeller |
US5364233A (en) * | 1993-08-30 | 1994-11-15 | Benoit Terry J | Irrigation pump apparatus |
US5494403A (en) * | 1992-04-14 | 1996-02-27 | Ebara Corporation | Full-circumferential flow pump |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2345635A1 (en) * | 1973-09-10 | 1975-03-27 | Stork Koninklijke Maschf | Bladed rotor production method - involves trimming mechanically produced hub and blades by electro-chemical and finally mechanical means |
DE4424996A1 (en) * | 1994-07-15 | 1996-01-18 | Oase Pumpen | Centrifugal pump, especially for fountains |
-
1999
- 1999-04-29 DE DE1999119192 patent/DE19919192A1/en not_active Withdrawn
-
2000
- 2000-04-22 EP EP00938505A patent/EP1173678A1/en not_active Withdrawn
- 2000-04-22 AU AU53887/00A patent/AU5388700A/en not_active Abandoned
- 2000-04-22 DE DE10081167T patent/DE10081167D2/en not_active Ceased
- 2000-04-22 WO PCT/DE2000/001264 patent/WO2000066893A1/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2111441A (en) * | 1935-07-26 | 1938-03-15 | Homer A Thrush | Circulator |
US3246605A (en) * | 1964-03-16 | 1966-04-19 | William L Fisher | Rotary pumps |
US3816020A (en) * | 1972-10-19 | 1974-06-11 | Selgo Pumps Inc | Pump |
US3975113A (en) * | 1974-12-31 | 1976-08-17 | Ogles Ethridge F | Centrifugal pump |
US4589822A (en) * | 1984-07-09 | 1986-05-20 | Mici Limited Partnership Iv | Centrifugal blood pump with impeller |
US5494403A (en) * | 1992-04-14 | 1996-02-27 | Ebara Corporation | Full-circumferential flow pump |
US5364233A (en) * | 1993-08-30 | 1994-11-15 | Benoit Terry J | Irrigation pump apparatus |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010110937A1 (en) * | 2009-03-25 | 2010-09-30 | Woodward Governor Company | Centrifugal impeller with controlled force balance |
CN102361698A (en) * | 2009-03-25 | 2012-02-22 | 伍德沃德公司 | Centrifugal impeller with controlled force balance |
US8221070B2 (en) | 2009-03-25 | 2012-07-17 | Woodward, Inc. | Centrifugal impeller with controlled force balance |
Also Published As
Publication number | Publication date |
---|---|
EP1173678A1 (en) | 2002-01-23 |
AU5388700A (en) | 2000-11-17 |
DE19919192A1 (en) | 2000-11-09 |
DE10081167D2 (en) | 2002-05-29 |
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