EP0874161A1 - Pompe centrifuge - Google Patents

Pompe centrifuge Download PDF

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Publication number
EP0874161A1
EP0874161A1 EP98107094A EP98107094A EP0874161A1 EP 0874161 A1 EP0874161 A1 EP 0874161A1 EP 98107094 A EP98107094 A EP 98107094A EP 98107094 A EP98107094 A EP 98107094A EP 0874161 A1 EP0874161 A1 EP 0874161A1
Authority
EP
European Patent Office
Prior art keywords
blade
angle
impeller
area
course
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.)
Withdrawn
Application number
EP98107094A
Other languages
German (de)
English (en)
Inventor
Peer Springer
Wolfgang Kochanowski
Christian Haag
Thomas Pensler
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
Application filed by KSB AG filed Critical KSB AG
Publication of EP0874161A1 publication Critical patent/EP0874161A1/fr
Withdrawn legal-status Critical Current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
    • F04D29/181—Axial flow rotors
    • F04D29/183—Semi axial flow rotors

Definitions

  • the invention relates to a centrifugal pump with an impeller that has a single. has a helical blade.
  • Centrifugal pumps of this type include through DE 26 42 231 A1 and DE 28 55 385 B1 known. Housing and impeller of the known Centrifugal pumps are adapted to each other so that the blade edges with the Housing wall one over the entire blade length and over an entire Make the impeller revolution consistently narrow. About this one Pressure side from the suction side of the blade-separating gap flows at the conveying Centrifugal pump inevitably a leakage current depending on the gap width. At a new pump and if wear has not yet occurred on the The blade edge and the housing wall is the one generated by the leakage current Loss still small.
  • centrifugal pumps of the type described here are primarily for the promotion of solid media is used, is a heavy wear in the area the long, all-round blade edge for many of the possible ones Use cases inevitable.
  • the centrifugal pump comes on after a short time Wear on the original good efficiency of the pump considerably lowers.
  • Such a danger exists among other things in promoting municipal Waste water, the admixtures of which are essentially uncontrollable. So For example, sand and similar abrasive components of the Sewage cannot be excluded.
  • centrifugal pumps used, their pumping properties not after installation or only inadequately checked over a longer period of time work with a steadily decreasing efficiency. But that means that such pumps to fulfill the task assigned to them need unacceptably high energy expenditure.
  • the invention has for its object a centrifugal pump of the beginning to create the type mentioned, with minimal effort for impeller and Housing largely insensitive to wear against abrasive Has components in the medium and at which the risk of Burning of the impeller in the pump housing is avoided.
  • the impeller has a cover disk arranged on the suction side, which changes from an axial course given at the suction mouth of the impeller with a curvature into a radial course, that in the area that is subject to cavitation when the flow of shock occurs, the blade entry angle by at least 5 o is smaller than the inflow angle, so that the blade angle in the axial area of a meridian cut through the impeller increases at least to the size of the blade exit angle, and finally a blade angle exceeding the blade exit angle in the radial area of the meridian cut is reduced to the size of the blade exit angle.
  • the cover plate used in the solution according to the invention forms with the Pump housing a radially flowed gap, which is relatively short and narrow can be executed. So it becomes the one with a conical annular gap given problems avoided.
  • Curved cover plate according to the invention of one in use configured wheel side space can be surrounded, the wall of which is relative has a large distance from the cover plate.
  • the invention carries with a specially designed axial entry area of the impeller bill. Namely, the blade entry angle in the Impact flow cavitation area designed much smaller than the flow angle of the liquid to be pumped, so there is cavitation avoided.
  • the blade angle must necessarily be at the impeller inlet subsequent area increase significantly. Now the transition from To achieve axial in the radial impeller course, the blade angle in the mentioned cavitation area after one in the axial Impeller part took a steep rise in the radial part on the Blade exit angle supplied. With an increase in the axial part in addition to the dimension of the blade exit angle, this means that the Blade angle in the radial part to the dimension of the blade outlet angle is due.
  • the impeller 1 shown in FIG. 1 has a helical one Blade 2, which is between a front, suction-side cover plate 3 and a rear, pressure-side cover plate 4 is arranged.
  • the shovel loops around an essentially conical hub 5.
  • the blade 2 has an entry edge 6 and a trailing edge 7.
  • the blade 2 is in the front view without the limit Parts, front cover 3, rear cover 4 and hub 5, shown To
  • the leading edge 6 and the trailing edge 7 can also be seen here by means of arrows the radius R and the wrap angle ⁇ are indicated, which refer to refer to the blade 2 and which change with its course.
  • the radius R that starts from the axis Z of the impeller 1 is also FIG. 3 refer to.
  • the coordinate s along the Shovel 2 meridian streamline shown.
  • there are threads of electricity S1 to S5 in the meridian section of the between the leading edge 6 and the Trailing edge 7 extending blade 2 is shown.
  • Fig. 4 it can be seen how the angle ⁇ of the current filaments S1 to S5 changes with the progress of x / L. Above all, it can be seen that the angle ⁇ the one located in the area at risk of cavitation when there is a surge Current filaments S3 to S5 initially rise from a small initial value, and then slightly after reaching a maximum value towards the end of the bucket fall off.
  • the inflow angle ⁇ 0 of the liquid to be conveyed by the impeller is not shown in the drawing. It is at least 5 ° larger than the blade entry angle ⁇ 1 in the area at risk of cavitation when there is a surge flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP98107094A 1997-04-25 1998-04-18 Pompe centrifuge Withdrawn EP0874161A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19717458A DE19717458A1 (de) 1997-04-25 1997-04-25 Kreiselpumpe
DE19717458 1997-04-25

Publications (1)

Publication Number Publication Date
EP0874161A1 true EP0874161A1 (fr) 1998-10-28

Family

ID=7827706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98107094A Withdrawn EP0874161A1 (fr) 1997-04-25 1998-04-18 Pompe centrifuge

Country Status (3)

Country Link
US (1) US6343909B1 (fr)
EP (1) EP0874161A1 (fr)
DE (1) DE19717458A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007970A1 (fr) 2002-07-12 2004-01-22 Ebara Corporation Aubage d'alimentation et pompe equipee de ce dernier
CN103195755A (zh) * 2013-04-11 2013-07-10 南京布鲁克林环保设备有限公司 一种新型单叶片螺旋离心叶轮
WO2019025238A1 (fr) * 2017-08-03 2019-02-07 KSB SE & Co. KGaA Roue mobile pour pompe à eaux usées

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6435829B1 (en) * 2000-02-03 2002-08-20 The Boeing Company High suction performance and low cost inducer design blade geometry
US7691235B2 (en) * 2002-10-29 2010-04-06 Metso Paper, Inc. Apparatus and method for separating steam from pulp fibers
US7096712B2 (en) * 2003-04-21 2006-08-29 Conocophillips Company Material testing system for turbines
ATE528511T1 (de) * 2007-08-16 2011-10-15 Frideco Ag Pumpenlaufrad und pumpe umfassend ein derartiges pumpenlaufrad
US8550771B2 (en) * 2009-08-03 2013-10-08 Ebara International Corporation Inducer for centrifugal pump
US8506236B2 (en) * 2009-08-03 2013-08-13 Ebara International Corporation Counter rotation inducer housing
US20110027071A1 (en) * 2009-08-03 2011-02-03 Ebara International Corporation Multi-stage inducer for centrifugal pumps
US9631622B2 (en) 2009-10-09 2017-04-25 Ebara International Corporation Inducer for centrifugal pump
EP2894343B2 (fr) 2014-01-12 2021-09-01 Alfa Laval Corporate AB Pompe centrifuge à amorçage automatique
DK2894342T3 (en) * 2014-01-12 2017-04-03 Alfa Laval Corp Ab SELF-TILTING CENTRIFUGAL PUMP
US11867192B2 (en) 2018-12-19 2024-01-09 Pentair Flow Technologies, Llc Pump comprising an impeller body provided as an oblique cone

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2642231A1 (de) 1975-10-02 1977-04-14 Martin Staehle Einschaufel-zentrifugalpumpe zur foerderung von zaehfluessigen, insbesondere feststoffhaltigen medien
DE2855385B1 (de) 1978-08-31 1979-11-22 Martin Staehle Kreiselpumpe mit Einschaufel-Laufrad zur Foerderung von langfaserigen aufgeschwemmten Feststoffen
EP0011506A1 (fr) * 1978-11-17 1980-05-28 Spp Group Limited Roue à ailette unique rotodynamique
DE3416051A1 (de) * 1983-04-28 1985-01-10 Hans-Ulrich Schleitheim Schneider Hydrodynamische rotationspumpe
EP0360681A1 (fr) * 1988-09-22 1990-03-28 Etablissements F. Moret Roue de pompe Vortex

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1839126A (en) * 1929-05-17 1931-12-29 American Well Works Impeller
DE1017915B (de) * 1955-06-02 1957-10-17 Bergedorfer Eisenwerk Ag Kreiselpumpe fuer fluessige Nahrungsmittel
US3156190A (en) * 1963-03-14 1964-11-10 Hidrostal Pump impeller
US3442220A (en) * 1968-08-06 1969-05-06 Rolls Royce Rotary pump
US3602604A (en) * 1969-10-15 1971-08-31 Bernard M Ronellenfitch Pump construction
IT1174991B (it) * 1983-07-06 1987-07-01 Pompe F B M Spa Pompa centrifuga per materiali e prodotti molto densi e/o viscosi
US5487644A (en) * 1987-02-13 1996-01-30 Ishigaki Mechanical Industry Co., Ltd Pump having a single or a plurality of helical blades

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2642231A1 (de) 1975-10-02 1977-04-14 Martin Staehle Einschaufel-zentrifugalpumpe zur foerderung von zaehfluessigen, insbesondere feststoffhaltigen medien
DE2855385B1 (de) 1978-08-31 1979-11-22 Martin Staehle Kreiselpumpe mit Einschaufel-Laufrad zur Foerderung von langfaserigen aufgeschwemmten Feststoffen
EP0011506A1 (fr) * 1978-11-17 1980-05-28 Spp Group Limited Roue à ailette unique rotodynamique
DE3416051A1 (de) * 1983-04-28 1985-01-10 Hans-Ulrich Schleitheim Schneider Hydrodynamische rotationspumpe
EP0360681A1 (fr) * 1988-09-22 1990-03-28 Etablissements F. Moret Roue de pompe Vortex

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004007970A1 (fr) 2002-07-12 2004-01-22 Ebara Corporation Aubage d'alimentation et pompe equipee de ce dernier
EP1536143A1 (fr) * 2002-07-12 2005-06-01 Ebara Corporation Aubage d'alimentation et pompe equipee de ce dernier
EP1536143A4 (fr) * 2002-07-12 2010-12-01 Ebara Corp Aubage d'alimentation et pompe equipee de ce dernier
CN103195755A (zh) * 2013-04-11 2013-07-10 南京布鲁克林环保设备有限公司 一种新型单叶片螺旋离心叶轮
CN103195755B (zh) * 2013-04-11 2015-10-07 南京布鲁克林环保设备有限公司 一种单叶片螺旋离心叶轮
WO2019025238A1 (fr) * 2017-08-03 2019-02-07 KSB SE & Co. KGaA Roue mobile pour pompe à eaux usées
US11603855B2 (en) 2017-08-03 2023-03-14 KSB SE & Co. KGaA Impeller for wastewater pump
AU2018310551B2 (en) * 2017-08-03 2023-11-23 KSB SE & Co. KGaA Impeller for wastewater pump

Also Published As

Publication number Publication date
US6343909B1 (en) 2002-02-05
DE19717458A1 (de) 1998-10-29

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