EP0360681A1 - Wirbelpumpenlaufrad - Google Patents

Wirbelpumpenlaufrad Download PDF

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Publication number
EP0360681A1
EP0360681A1 EP89402556A EP89402556A EP0360681A1 EP 0360681 A1 EP0360681 A1 EP 0360681A1 EP 89402556 A EP89402556 A EP 89402556A EP 89402556 A EP89402556 A EP 89402556A EP 0360681 A1 EP0360681 A1 EP 0360681A1
Authority
EP
European Patent Office
Prior art keywords
wheel
blades
pump
blade
outside
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.)
Granted
Application number
EP89402556A
Other languages
English (en)
French (fr)
Other versions
EP0360681B1 (de
Inventor
Michel Georges
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.)
F MORET Ets
Original Assignee
F MORET Ets
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 F MORET Ets filed Critical F MORET Ets
Priority to AT89402556T priority Critical patent/ATE70341T1/de
Publication of EP0360681A1 publication Critical patent/EP0360681A1/de
Application granted granted Critical
Publication of EP0360681B1 publication Critical patent/EP0360681B1/de
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
    • F04D29/2244—Free vortex
    • 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

Definitions

  • the present invention relates to a centrifugal pump wheel with a vortex effect, called a Vortex pump, this wheel being equipped with one or more blades.
  • Vortex pumps are particularly well suited for the transport of liquids laden with suspended particles and large particle sizes. Indeed, the free space, located in front of the wheel, allows the passage of these laden liquids without risk of blockage or blockage, and by limiting the wear of the blades and in general its maintenance. Vortex pumps are therefore widely used in the transport of waste water or loaded with sludge, rags, grasses or various pieces, abrasive particles in suspension, etc.
  • a Vortex pump is distinguished from other centrifugal pumps by a chamber consisting of a free space located in front of the impeller.
  • the charged liquid enters this chamber through the suction duct, is subjected to the swirling effect created in the chamber by the wheel and is discharged towards the discharge duct.
  • Vortex pump wheel is necessarily associated with a chamber, a wheel of another centrifugal pump with elements delimiting channels for passage of the liquid between the blades of said wheel.
  • Vortex pump wheel is used to create a vortex effect in a chamber, a wheel of another centrifugal pump is used to transport all the liquid.
  • impeller of a Vortex pump and the impeller of a centrifugal pump are two completely separate means, differing both in their structure and in their function, and it is not possible to transpose this into the domain of Vortex pumps. which is done in that of other centrifugal pumps.
  • Vortex pumps on the one hand have low efficiencies, compared to conventional centrifugal pumps, and on the other hand have operating curves (height as a function of flow rate) whose slope is very slight.
  • Vortex pumps we have already tried to improve the characteristics of Vortex pumps, by fitting the impeller and in particular the blades.
  • the latter are usually rectilinear plates mounted radially and perpendicularly on the flange or disc supporting the blades of the impeller.
  • the arrangements concerning the blades consisted in modifying either the shape or the positioning of the blades relative to the flange.
  • the blades According to French patent FR-A-1,316,257 and English patent GB 1,031,134, the blades have an attack surface inclined forward or backward, relative to the direction of rotation of the wheel.
  • the blades have a double curvature: on the one hand the leading edge is not straight but curved, and on the other hand their attack surfaces are inclined, according to a curve, towards the 'forward with respect to the direction of rotation of the wheel. This forward tilt is maximum outside and minimum towards the hub.
  • the shape of the blades improves the pump's efficiency, decreases the pumping power and decreases the slope of the operating curve.
  • the blades have a leading surface which is perpendicular to the flange towards the outside of the wheel and which is inclined forward towards the hub.
  • the Vortex pump wheel is equipped with one or more blades which have an evolving attack surface, that is to say being modified progressively, from the outside of the wheel to the hub. , being substantially flat and tilted backwards in an area located towards the outside of the wheel, and straightening as it approaches the hub so that at least the upper part of the blade containing the leading edge is substantially perpendicular to the flange in an area close to the hub.
  • the surface of the vane which faces the inside of the impeller and therefore the liquid in motion during the rotation of the pump is designated by the attack surface.
  • the general inclination of the blade is towards the rear, and the blade has a curvature achieving the progressive straightening of the attack surface from the end of the outer zone where it is flat and inclined , to the area near the hub where it is, at least in its upper part, substantially perpendicular to the flange.
  • the blade has, in the zone situated towards the outside of the wheel, where it is substantially flat, an inclination relative to the perpendicular to the flange from 30 ° to 60 °.
  • the zone situated towards the outside of the wheel, where the attack surface is substantially flat and inclined towards the rear, extends over half of the blade.
  • the wheel of FIG. 1 comprises the support flange 2 on which the blades 3 are mounted. These are also distributed on the flange 2 with respect to its axis of rotation 4.
  • the wheel 1 is housed inside a chamber 5, called a scroll, into which the suction duct 6 opens facing the axis of rotation 4 and the discharge duct 7, the direction of which is transverse to the axis of rotation 4.
  • Chamber 5, facing the wheel 1 has a recess characteristic of the Vortex pump, which allows the passage of solid products to be transported.
  • Each blade 3 extends over an annular zone delimited by the central part corresponding to the hub of the wheel 1.
  • this annular zone is fictitiously cut into two concentric annular zones 12 and 13, the zone 13 being the more exterior.
  • the maximum efficiency of the pump according to the invention corresponds to lower flow values; this is an additional advantage provided by the wheel of the invention.
  • the value of the NPSH it is almost identical for the two pumps in the operating zone of the pump according to the invention.

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)
  • Fertilizing (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
EP89402556A 1988-09-22 1989-09-19 Wirbelpumpenlaufrad Expired - Lifetime EP0360681B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89402556T ATE70341T1 (de) 1988-09-22 1989-09-19 Wirbelpumpenlaufrad.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812708 1988-09-22
FR8812708A FR2636680B1 (fr) 1988-09-22 1988-09-22 Roue de pompe vortex

Publications (2)

Publication Number Publication Date
EP0360681A1 true EP0360681A1 (de) 1990-03-28
EP0360681B1 EP0360681B1 (de) 1991-12-11

Family

ID=9370505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89402556A Expired - Lifetime EP0360681B1 (de) 1988-09-22 1989-09-19 Wirbelpumpenlaufrad

Country Status (4)

Country Link
EP (1) EP0360681B1 (de)
AT (1) ATE70341T1 (de)
DE (1) DE68900539D1 (de)
FR (1) FR2636680B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0874161A1 (de) * 1997-04-25 1998-10-28 KSB Aktiengesellschaft Kreiselpumpe
EP1039140A3 (de) * 1999-03-19 2000-11-08 Mannesmann VDO AG Förderpumpe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR763779A (fr) * 1932-12-24 1934-05-07 Voith Gmbh J M Rotor ouvert pour pompes centrifuges
DE1112609B (de) * 1960-01-08 1961-08-10 Voith Gmbh J M Verfahren zum Herstellen eines Schaufelrades durch spanlose Form-gebung und dessen Ausbildung
FR1316257A (fr) * 1962-02-27 1963-01-25 Emile Egger & Co A G Pompe pour la circulation des fluides contenant des matières en suspension
US3384026A (en) * 1966-08-16 1968-05-21 Itt Pump apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU958715A1 (ru) * 1980-12-31 1982-09-15 Специальное Конструкторско-Технологическое Бюро Герметичных И Скважинных Насосов (Сктб) Открытое рабочее колесо центробежной гидромашины

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR763779A (fr) * 1932-12-24 1934-05-07 Voith Gmbh J M Rotor ouvert pour pompes centrifuges
DE1112609B (de) * 1960-01-08 1961-08-10 Voith Gmbh J M Verfahren zum Herstellen eines Schaufelrades durch spanlose Form-gebung und dessen Ausbildung
FR1316257A (fr) * 1962-02-27 1963-01-25 Emile Egger & Co A G Pompe pour la circulation des fluides contenant des matières en suspension
US3384026A (en) * 1966-08-16 1968-05-21 Itt Pump apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED, semaine 30, 7 septembre 1983, section Q, classe Q56, résumé no. 83-721272/30, Derwent Publications Ltd, Londres, GB; & SU-A-958 715 (SEALED BORE PUMPS) 15-09-1982 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0874161A1 (de) * 1997-04-25 1998-10-28 KSB Aktiengesellschaft Kreiselpumpe
EP1039140A3 (de) * 1999-03-19 2000-11-08 Mannesmann VDO AG Förderpumpe
US6302639B1 (en) 1999-03-19 2001-10-16 Mannesmann Vdo Ag Feed pump

Also Published As

Publication number Publication date
FR2636680B1 (fr) 1994-03-25
DE68900539D1 (de) 1992-01-23
ATE70341T1 (de) 1991-12-15
EP0360681B1 (de) 1991-12-11
FR2636680A1 (fr) 1990-03-23

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