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EP0750119B1 - Rouet de pompe - Google Patents

Rouet de pompe Download PDF

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Publication number
EP0750119B1
EP0750119B1 EP95117565A EP95117565A EP0750119B1 EP 0750119 B1 EP0750119 B1 EP 0750119B1 EP 95117565 A EP95117565 A EP 95117565A EP 95117565 A EP95117565 A EP 95117565A EP 0750119 B1 EP0750119 B1 EP 0750119B1
Authority
EP
European Patent Office
Prior art keywords
impeller
pump
blade
thickening
starting zone
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
EP95117565A
Other languages
German (de)
English (en)
Other versions
EP0750119A1 (fr
Inventor
Manfred Zelder
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.)
Wilo GmbH
Original Assignee
Wilo GmbH
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
Application filed by Wilo GmbH filed Critical Wilo GmbH
Publication of EP0750119A1 publication Critical patent/EP0750119A1/fr
Application granted granted Critical
Publication of EP0750119B1 publication Critical patent/EP0750119B1/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
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/225—Channel wheels, e.g. one blade or one flow channel
    • 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
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the invention relates to a pump impeller Radial centrifugal pump in particular with a submersible pump two curved blades attached to one of the impeller hub nearby disc are firm, with the two on the suction side Buckets protrude freely into the pump room without touching one another impeller disc to be firm (half-open Wheel).
  • the impeller is known for clog-free pumps to do with a single shovel.
  • Such single-bladed impellers have a lower one Efficiency and lead to a so-called hydrodynamic imbalance caused by the asymmetrical Passing the only shovel past the discharge nozzle arises.
  • the mechanical unbalance is added to the hydrodynamic imbalance, it being known the mechanical imbalance due to an asymmetrical distribution counteracting the masses in the impeller.
  • Impellers such as those from US 1959710 and US 1846834 are known. not given. This Impellers are more likely to clog the Pump especially for waste water with material residues such as a rag. A rag can spread over both blades place and get stuck on both blades.
  • the object of the invention is simple construction the freedom from blockage of a radial centrifugal pump to improve the type mentioned at the beginning.
  • the impeller according to the invention thus pays for itself Two-bladed not with increased Risk of constipation, but this calm working Impeller is similar to low clogging as a single-bladed.
  • the thickening the starting area of the first blade on the Side of the blade facing away from the impeller axis is.
  • the thickening should also be in the front curve over the front edge of the bucket.
  • the unbalance is reduced by that the unbalance caused by the thickening through a reduction in mass on the same side of the impeller or through a mass increase on the opposite Impeller side is lifted. It is also an advantage if the impeller is made of plastic.
  • the impeller 1 of a radial centrifugal pump which as Submersible pump can be used, has a circular Disc 2, on the back of which a hub 3 coaxially is molded, in which a socket 4 is cast can to the impeller on the shaft of an electric motor fasten.
  • blades on the front of disc 2 5, 6 in front which protrude freely into the pump chamber, so that it is a half-open impeller.
  • the blades 5 and 6 are opposite each other in a rotationally symmetrical manner molded on the plastic disc 2 and taper in its thickness D towards the pump inlet side.
  • the impeller shown in Figure 1 rotates in Direction of arrow 7 so that the blade leading edges 5a and 6a first on the liquid to be pumped to meet. These leading edge of the bucket are together with an adjoining area as Blade beginning areas 5b, 6b. While the two outside the blade start areas 5b, 6b Blades 5, 6 are identical, there is a Difference in these blade start areas:
  • the thickness D1 is the Blade start area 5b larger than the thickness D2 of the Blade start area 6b, the second blade 6.
  • the exemplary embodiment is the additional thickening of the Initial area 5b of the first blade 5 on the Shaped impeller axis 8 facing away from the blade.
  • the thickness D 1 is only slightly larger than the thickness D2 (0.1-4mm or 5-40% larger than D2) is the effect for greater freedom from constipation.
  • the length of the thickened blade start area 5b is 1/20 to 1/4 of the total length of the first blade 5.
  • the thickening goes in at the blade leading edge 5a their rounding so that the first blade 5 is shaped as aerodynamically as the second Bucket 6.
  • the unbalance caused by the thickening balance, the impeller has on the side of the 5th a mass reduction or on the opposite Side a mass increase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (5)

  1. Rotor (1) de pompe d'une pompe centrifuge radiale, en particulier d'une pompe à moteur submersible, avec deux palettes (5, 6) courbes qui sont fixes sur un disque voisin du moyeu (3) du rotor, les deux palettes faisant saillie librement du côté aspiration sans être fixes sur un autre disque de rotor,
    caractérisé en ce que la zone initiale (5b) de palette épaissie incidente en premier sur le liquide présente une épaisseur (D1) plus grande que la zone initiale de la seconde palette (6), la longueur de la zone initiale (5b) de palette épaissie étant égale à 1/20 à 1/4 de la longueur totale de la première palette (5).
  2. Rotor de pompe selon la revendication 1,
    caractérisé en ce que l'épaississement (V) de la zone initiale (5b) de la première palette (5) est disposé sur la face de la palette écartée de l'axe (8) du rotor.
  3. Rotor de pompe selon la revendication 1,
    caractérisé en ce que l'épaississement (V) se transforme en l'arrondi antérieur de l'arête antérieure (5a) de la palette.
  4. Rotor de pompe selon l'une des revendications précédentes,
    caractérisé en ce que le balourd créé par l'épaississement (V) est compensé par une réduction de masse sur la même face du rotor ou par une augmentation de masse sur la face opposée du rotor.
  5. Rotor de pompe selon l'une des revendications précédentes,
    caractérisé en ce que le rotor (1) est en matière synthétique.
EP95117565A 1995-06-19 1995-11-08 Rouet de pompe Expired - Lifetime EP0750119B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19521768 1995-06-19
DE19521768A DE19521768A1 (de) 1995-06-19 1995-06-19 Pumpenlaufrad

Publications (2)

Publication Number Publication Date
EP0750119A1 EP0750119A1 (fr) 1996-12-27
EP0750119B1 true EP0750119B1 (fr) 2000-05-10

Family

ID=7764431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117565A Expired - Lifetime EP0750119B1 (fr) 1995-06-19 1995-11-08 Rouet de pompe

Country Status (3)

Country Link
US (1) US5692880A (fr)
EP (1) EP0750119B1 (fr)
DE (2) DE19521768A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2195733B1 (es) * 2001-07-20 2005-08-16 Fagor, S.Coop. Bomba hidraulica con guiador de flujo.
US6979174B2 (en) * 2003-10-01 2005-12-27 Schlumberger Technology Corporation Stage pump having composite components
JP4554189B2 (ja) * 2003-11-26 2010-09-29 株式会社エンプラス 遠心式羽根車
US7544042B2 (en) * 2006-01-03 2009-06-09 Emerson Electric Co. Insert with sleeve for a molded impeller
DE102011007907B3 (de) * 2011-04-21 2012-06-21 Ksb Aktiengesellschaft Laufrad für Kreiselpumpen
CN104685217B (zh) * 2012-08-23 2017-10-24 苏尔寿管理有限公司 用于输送废水的泵以及用于这种泵的叶轮和底板
CN103216452B (zh) * 2013-04-25 2016-05-11 常州雷利电机科技有限公司 排水泵
JP6488167B2 (ja) * 2015-03-27 2019-03-20 株式会社荏原製作所 渦巻ポンプ
AU201614369S (en) * 2016-08-12 2016-10-27 Weir Minerals Australia Ltd Impeller
USD810788S1 (en) * 2016-08-25 2018-02-20 Weir Minerals Australia Ltd. Pump impeller
USD810789S1 (en) * 2016-08-25 2018-02-20 Weir Minerals Australia Ltd. Pump impeller
DE102017221930A1 (de) * 2017-12-05 2019-06-06 KSB SE & Co. KGaA Laufrad für Abwasserpumpe

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US553956A (en) * 1896-02-04 Explosive valve for blast-furnaces
US1754992A (en) * 1926-12-06 1930-04-15 American Well Works Centrifugal pump
US1864834A (en) * 1927-12-28 1932-06-28 Buffalo Steam Pump Company Centrifugal pump impeller
US1959710A (en) * 1931-09-21 1934-05-22 Chicago Pump Co Pump
US2265758A (en) * 1940-05-29 1941-12-09 Buffalo Pumps Inc Pump
US4063849A (en) * 1975-02-12 1977-12-20 Modianos Doan D Non-clogging, centrifugal, coaxial discharge pump
US4087994A (en) * 1976-09-07 1978-05-09 The Maytag Company Centrifugal pump with means for precluding airlock
IT8022473A0 (it) * 1979-06-22 1980-05-30 Klein Schanzlin & Becker Ag Girante aperta per pompe centrifughe.
US4293280A (en) * 1980-08-27 1981-10-06 The United States Of America As Represented By The Secretary Of The Navy Transcavitating propeller
US4681508A (en) * 1984-11-14 1987-07-21 Kim Choong W Supercavitation centrifugal pump
JPS61252893A (ja) * 1985-05-02 1986-11-10 Hitachi Ltd 汚水汚物ポンプ
DE4328396A1 (de) * 1993-08-24 1995-03-02 Klein Schanzlin & Becker Ag Einschaufelrad für Kreiselpumpen

Also Published As

Publication number Publication date
DE59508322D1 (de) 2000-06-15
DE19521768A1 (de) 1997-01-02
US5692880A (en) 1997-12-02
EP0750119A1 (fr) 1996-12-27

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