EP0360681B1 - Wirbelpumpenlaufrad - Google Patents

Wirbelpumpenlaufrad Download PDF

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Publication number
EP0360681B1
EP0360681B1 EP89402556A EP89402556A EP0360681B1 EP 0360681 B1 EP0360681 B1 EP 0360681B1 EP 89402556 A EP89402556 A EP 89402556A EP 89402556 A EP89402556 A EP 89402556A EP 0360681 B1 EP0360681 B1 EP 0360681B1
Authority
EP
European Patent Office
Prior art keywords
wheel
blade
pump
blades
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.)
Expired - Lifetime
Application number
EP89402556A
Other languages
English (en)
French (fr)
Other versions
EP0360681A1 (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

  • 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.
  • 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 efficiency of the pump, decreases the pumping power and decreases the slope of the operating curve.
  • Vortex pump impeller according to the invention is equipped with one or more vanes which have an evolving attack surface, that is to say being modified progressively, from the outside of the impeller to the hub , being, in consideration of sections perpendicular to the radius of the wheel, substantially planar and inclined backwards in an area located towards the outside of the wheel, and straightening 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 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.
  • the preferred wheel 1 of the invention and shown in FIG. 2 has six blades 3, also distributed over the flange 2. They are substantially radial, that is to say that the guideline of each blade passes approximately through the axis of rotation 4 of the wheel 1.
  • the general direction taken by the blade in the plane situated halfway between the leading edge 10 and the top 11 of the flange 2, and perpendicular to the axis, is called the guideline. of rotation 4 of the wheel 1.
  • 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 attack surface 14 of the blade 3 is flat and inclined towards the rear relative to the direction of rotation of the wheel according to arrow F.
  • the angle of inclination is 45 ° relative to the perpendicular 15 to the flange 2.
  • the upper part of the blade comprising the leading edge 10 straightens progressively from point 16, bordering on the annular zone 13, until hub 17 so as to be perpendicular to the flange in its part closest to the hub.
  • This progressive straightening of the upper part of the blade produces a curving of the blade, as illustrated in FIGS. 3a and 3b.
  • the leading edge 10 of the blade is rectilinear in the annular zone 13 situated towards the outside, while it is slightly curved in the annular zone 12 situated inwards, because of this curvature.

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)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Fertilizing (AREA)

Claims (3)

1. Wirbelpumpenlaufrad (1), ausgestattet mit einem oder mehreren Drallblechen (3), dadurch gekennzeichnet, daß jedes Drallblech (3) eine Angriffsfläche (14) hat, die sich von der Außenseite des Rads in Richtung Radnabe (17) verändert, und, bezüglich der Schnitte senkrecht zum Radius des Rads, deutlich glatt und in einer äußeren Zone (13) des Rads (1) rückwärts geneigt ist und sich in der Weise aufrichtet, daß mindestens der obere Teil des Drallblechs mit dem Angriffsflächenrand (10) in einer der Nabe nahen Zone (12) deutlich senkrecht zum Nabendeckel (2) steht.
2. Laufrad gemäß dem Anspruch 1, dadurch gekennzeichnet, daß in der äußeren Zone des Rads das Drallblech (3) deutlich glatt und bezüglich der Senkrechten zum Nabendeckel (2) in einem Winkel zwischen 30 und 60, vorzugsweise 45 Grad geneigt ist.
3. Laufrad gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die äußere Zone (13) des Rads, in der die Angriffsfläche (14) deutlich glatt und rückwärts geneigt ist, sich deutlich über die Hälfte des Drallblechs erstreckt.
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
FR8812708A FR2636680B1 (fr) 1988-09-22 1988-09-22 Roue de pompe vortex
FR8812708 1988-09-22

Publications (2)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717458A1 (de) * 1997-04-25 1998-10-29 Klein Schanzlin & Becker Ag Kreiselpumpe
DE19912314C2 (de) * 1999-03-19 2002-10-10 Siemens Ag Förderpumpe

Family Cites Families (5)

* 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
SU958715A1 (ru) * 1980-12-31 1982-09-15 Специальное Конструкторско-Технологическое Бюро Герметичных И Скважинных Насосов (Сктб) Открытое рабочее колесо центробежной гидромашины

Also Published As

Publication number Publication date
DE68900539D1 (de) 1992-01-23
EP0360681A1 (de) 1990-03-28
FR2636680A1 (fr) 1990-03-23
FR2636680B1 (fr) 1994-03-25
ATE70341T1 (de) 1991-12-15

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