EP0237921B1 - Ailette pour pompe axiale - Google Patents

Ailette pour pompe axiale Download PDF

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Publication number
EP0237921B1
EP0237921B1 EP87103399A EP87103399A EP0237921B1 EP 0237921 B1 EP0237921 B1 EP 0237921B1 EP 87103399 A EP87103399 A EP 87103399A EP 87103399 A EP87103399 A EP 87103399A EP 0237921 B1 EP0237921 B1 EP 0237921B1
Authority
EP
European Patent Office
Prior art keywords
vane
inlet edge
leading edge
strips
blade
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 - Lifetime
Application number
EP87103399A
Other languages
German (de)
English (en)
Other versions
EP0237921A2 (fr
EP0237921A3 (en
Inventor
Jan Dr. Bernauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSB AG
Original Assignee
KSB AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6296169&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0237921(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KSB AG filed Critical KSB AG
Priority to AT87103399T priority Critical patent/ATE65585T1/de
Publication of EP0237921A2 publication Critical patent/EP0237921A2/fr
Publication of EP0237921A3 publication Critical patent/EP0237921A3/de
Application granted granted Critical
Publication of EP0237921B1 publication Critical patent/EP0237921B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/181—Axial flow rotors

Definitions

  • the invention relates to a rotor blade for an axial or semi-axial centrifugal pump for conveying liquids loaded with long-fiber admixtures, the leading edge of the rotor blade having an increasingly backward curvature from the inside out, which at every point of the leading edge satisfies the condition that the resultant the resistance force acting on a particle in the flowing liquid and the centrifugal force at least approximately form the tangent to the leading edge.
  • a blade corresponding to this generic term is previously known from DE-C-500 266.
  • the blades of a propeller that their front edges are directed or curved so strongly in the direction of rotation that the angle between the direction of movement and the Tangent to the leading edge of the wing is at least 110 degrees in each point.
  • This design counteracts the blockage of an axial screw or propeller pump caused by curling plants or herbs, which is used to drain lowlands. Looping crops caught by the impeller are to be prevented from winding around the impeller and its hub by rapidly sliding in the direction of the impeller circumference.
  • the invention has for its object to improve the economically preferable axial or semi-axial centrifugal pumps with a high peripheral speed, which are particularly susceptible to long-fiber admixtures, for the conveyance of liquids that are loaded with a high proportion of such solids.
  • this object is achieved according to the invention in that the entry angle of the moving blade in its outer region has a course shifting the stagnation point (S) of the blade profile onto the suction side of the moving blade.
  • FIG. 3 shows a moving blade, the backward curved leading edge of which is basically known with its sliding effect.
  • the invention is implemented on this rotor blade. This is particularly clear from FIG. 4, which shows the profile of the rotor blade of FIG. 3 in different sectional areas.
  • the conventional rotor blade (1) shown in FIGS. 1 and 2 of a high-speed axial centrifugal pump inevitably catches and holds a large part of the admixtures when conveying liquids with long-fiber admixtures.
  • the main reason for this is that in such pumps the ratio of the peripheral speed to the meridional speed is approximately five to six.
  • a longer strip (2) is gripped by one of the blades (1) before it has passed the impeller (3). If the detection point of the strip (2) is close to its center of gravity, the strip (2) can no longer detach from the leading edge (4) of the moving blade (1); it is constantly whirled around by the impeller (3).
  • Fig. 1 shows the initial phase of a resulting constipation process.
  • FIG. 3 shows the force parallelogram acting on the leading edge (7) of the rotor blade (6) on a particle in the conveying liquid. It can be seen that a solid foreign body reaching the leading edge (7) is torn away by the resulting force R before it can contact the moving blade (6).
  • the profile of the rotor blade (6) can be seen in three sectional areas from FIG. 4, where I stands for "inside”, M for “center” and A for "outside".
  • the entry angle of the rotor blade (6) has such a profile in its outer area that the stagnation point S of the profile shifts to the suction side (8) of the rotor blade (6). This further facilitates the transport of solids through the impeller (9).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Centrifugal Separators (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)

Claims (1)

  1. Aube de roue pour une pompe centrifuge axiale ou semiaxiale pour le refoulement de liquides chargés impuretés à fibre longue, dans laquelle l'arête d'entrée (7) de l'aube de roue (6) présente une courbure dirigée vers l'arrière et s'amplifiant de l'intérieur vers l'extérieur et qui, à chaque point de l'arête d'entrée (7) répond à la condition telle que la résultante (R) de la force de résistance agissant sur une particule se trouvant dans le liquide (W) qui s'écoule et de la force centrifuge (F) forme au moins approximativement la tangente à l'arête d'entrée, caractérisée en ce que l'angle d'entrée de l'aube de roue (6) possêde dans la zone extérieure de cette dernière un tracé qui repousse le point mort (S) du profil de l'aube sur le côté d'aspiration (8) de l'aube de roue (6).
EP87103399A 1986-03-12 1987-03-10 Ailette pour pompe axiale Expired - Lifetime EP0237921B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87103399T ATE65585T1 (de) 1986-03-12 1987-03-10 Laufschaufel fuer eine axialkreiselpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863608229 DE3608229A1 (de) 1986-03-12 1986-03-12 Laufschaufel fuer eine axialkreiselpumpe
DE3608229 1986-03-12

Publications (3)

Publication Number Publication Date
EP0237921A2 EP0237921A2 (fr) 1987-09-23
EP0237921A3 EP0237921A3 (en) 1988-10-05
EP0237921B1 true EP0237921B1 (fr) 1991-07-24

Family

ID=6296169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87103399A Expired - Lifetime EP0237921B1 (fr) 1986-03-12 1987-03-10 Ailette pour pompe axiale

Country Status (6)

Country Link
US (1) US4775297A (fr)
EP (1) EP0237921B1 (fr)
AT (1) ATE65585T1 (fr)
CA (1) CA1274121A (fr)
DE (1) DE3608229A1 (fr)
DK (1) DK165800C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103644140A (zh) * 2013-12-05 2014-03-19 江苏大学 一种潜水轴流泵导叶设计方法及潜水轴流泵导叶

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352093A (en) * 1989-07-24 1994-10-04 Hannon R Douglas Weedless propeller
US5236310A (en) * 1989-12-13 1993-08-17 Brunswick Corporation Marine propeller with performance pitch, including five blade version
US5104292A (en) * 1989-12-13 1992-04-14 Brunswick Corporation Marine propeller with performance pitch, including five blade version
US5249993A (en) * 1991-07-19 1993-10-05 Martin Roland V R Weed resistant boat propeller
SE468955B (sv) * 1991-08-28 1993-04-19 Flygt Ab Itt Igensaettningsfri pump
DE4314477A1 (de) * 1993-05-03 1994-11-10 Klein Schanzlin & Becker Ag Kreiselpumpe axialer Bauart
DE4433066C2 (de) * 1994-09-16 2002-08-01 Ksb Ag Halbaxiale Einlaufdüsen für Axialpumpen
DE19651736A1 (de) * 1996-12-12 1998-06-18 Andreas Dr Keller Wasserturbine oder -pumpe
US20060275131A1 (en) * 2005-06-06 2006-12-07 Duffy Electric Boat Co. Propeller
US20060273698A1 (en) * 2005-06-06 2006-12-07 Duffy Electric Boat Co. Waterproof storage unit
ATE385290T1 (de) * 2005-12-21 2008-02-15 Grundfos Management As Laufrad für ein pumpenaggregat und zugehöriges pumpenaggregat
JP4710613B2 (ja) * 2006-01-05 2011-06-29 株式会社日立プラントテクノロジー 軸流ポンプ
CN101105181B (zh) * 2006-07-14 2010-06-16 格伦德福斯管理有限公司 泵用叶轮
EP2300136B1 (fr) * 2008-06-20 2018-08-15 Philadelphia Mixing Solutions, Ltd. Agitateur à admission axiale-radiale mixte équipé d'un couteau circulaire

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806A (en) * 1842-10-07 Machine fob cutting shingles
DE500266C (de) * 1930-06-23 Koester Friedrich Propeller, der in einem Gehaeuse arbeitet
US1849127A (en) * 1926-11-19 1932-03-15 Albert B Wood Centrifugal pump
US1991095A (en) * 1933-10-14 1935-02-12 Westinghouse Electric & Mfg Co Silent pressure fan
US2202790A (en) * 1938-02-23 1940-05-28 Allis Chalmers Mfg Co Waste paper stock pump
US2272469A (en) * 1939-12-23 1942-02-10 Chicago Pump Co Centrifugal pump
US3081826A (en) * 1960-01-27 1963-03-19 Loiseau Christophe Ship propeller
US3367423A (en) * 1966-06-13 1968-02-06 Cornelius W. Van Ranst Propeller
SE362689B (fr) * 1972-02-21 1973-12-17 Joenkoepings Mek Werkstads
DE2442446A1 (de) * 1974-09-05 1976-03-18 Lederle Pumpen & Maschf Pumpe zum foerdern von wasser und abwasser
NL7806626A (en) * 1978-06-20 1979-12-27 Stamicarbon Impeller pump for waste water - has aerofoil impeller blades with leading edge receding at angle relative to radial
FI69683C (fi) * 1982-02-08 1986-03-10 Ahlstroem Oy Centrifugalpump foer vaetskor innehaollande fasta aemnen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103644140A (zh) * 2013-12-05 2014-03-19 江苏大学 一种潜水轴流泵导叶设计方法及潜水轴流泵导叶
CN103644140B (zh) * 2013-12-05 2015-08-26 江苏大学 一种潜水轴流泵导叶设计方法及潜水轴流泵导叶

Also Published As

Publication number Publication date
EP0237921A2 (fr) 1987-09-23
DK165800C (da) 1993-06-21
DK122787A (da) 1987-09-13
EP0237921A3 (en) 1988-10-05
DE3608229A1 (de) 1987-09-17
DK165800B (da) 1993-01-18
ATE65585T1 (de) 1991-08-15
CA1274121A (fr) 1990-09-18
DK122787D0 (da) 1987-03-10
US4775297A (en) 1988-10-04

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