EP0109550A2 - Rotor pour pompe à tourbillon - Google Patents

Rotor pour pompe à tourbillon Download PDF

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Publication number
EP0109550A2
EP0109550A2 EP83110411A EP83110411A EP0109550A2 EP 0109550 A2 EP0109550 A2 EP 0109550A2 EP 83110411 A EP83110411 A EP 83110411A EP 83110411 A EP83110411 A EP 83110411A EP 0109550 A2 EP0109550 A2 EP 0109550A2
Authority
EP
European Patent Office
Prior art keywords
blades
impeller
blade
projecting
base body
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Withdrawn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
EP83110411A
Other languages
German (de)
English (en)
Other versions
EP0109550A3 (fr
Inventor
Hans Heimgartner
Karl Wirz
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.)
Hany & Cie Ag
HAENY AND CIE AG
Original Assignee
Hany & Cie Ag
HAENY AND CIE 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 Hany & Cie Ag, HAENY AND CIE AG filed Critical Hany & Cie Ag
Publication of EP0109550A2 publication Critical patent/EP0109550A2/fr
Publication of EP0109550A3 publication Critical patent/EP0109550A3/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Withdrawn legal-status Critical Current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
    • F04D29/2244—Free vortex

Definitions

  • the present invention relates to an impeller for a free-flow pump according to the preamble of claim 1.
  • Free-flow pumps are therefore particularly suitable for pumping media with a particularly high content of solids, including those with abrasive properties.
  • the free edges of the blades which all extend the same distance from a base body, lay a plane or a surface of revolution, e.g. a conical surface, solid.
  • the present invention is based on the object of creating an impeller of the type mentioned which, while avoiding the disadvantages mentioned above and under the most varied of installation and operating conditions, provides a perfect conveying of media of all kinds, among others. even such very high consistency.
  • the first-mentioned blades protrude in the direction toward the conveying medium beyond the other blades. That has the consequence is that the protruding sections of the higher blades tear open the surface of the medium and create a swirl that enables the perfect conveying of media with a high consistency, such as cement suspensions and flowing mortar with a high sand content.
  • media with a high consistency such as cement suspensions and flowing mortar with a high sand content.
  • the free-flow or swirl wheel pump shown in the figures has a housing 1 with an inlet connector 2 and an outlet connector 3 for the pumped medium.
  • an impeller 4 which projects into the latter and is seated on a shaft 5.
  • This shaft 5 is connected to a drive motor, not shown, by which the impeller 4 is driven in the direction of arrow A.
  • the impeller 4 has a base body 6, from which a number of radially extending blades 7 protrude. A single one of these blades 7, namely the blade designated 7 ', protrudes from the base body 6 by a greater amount than the other blades 7, as can be seen in particular from FIGS. 1 and 3. The height H 'of this blade 7' is thus greater than the height H of the other blades 7 (Fig. 3). It should be noted that when comparing the heights, the heights at corresponding points on the blades, i.e. at points that are at the same distance from the axis 4a of the impeller 4, should be measured.
  • the free edges 7a of the blades 7 of lower height lie in a plane indicated by dash-dotted lines and designated by E, which is perpendicular to the axis 4a of the impeller 4.
  • the raised blade 7 ' now has a section 7b which protrudes beyond this plane E in the direction toward the conveyed medium. As FIG. 1 shows, this section 7b of the blade 7 'extends essentially over the entire length of the blade 7'.
  • a medium is fundamentally conveyed in the usual way for free-flow pumps, i.e. by imparting vortex impulses to the pumped medium through the impeller, whereby an axially symmetrical vortex formation takes place.
  • the raised blade 7 'additionally causes an asymmetrical vortex formation which is superimposed on the axially symmetrical vortex formation. This will improve the promotional effect.
  • this blade 7' causes the surface of the conveyed medium to be torn open and swirled. It is therefore also possible to use a vortex wheel pump equipped with the impeller according to the invention to also convey media with a high consistency, such as e.g. To promote cement suspensions and flowing mortar with a high sand content without the risk that the impeller 4 will sweep over the medium to be conveyed without the eddy formation required for conveying occurring.
  • Free-flow pumps equipped with an impeller according to the invention can also be fitted with a vertical impeller shaft open containers, shafts and the like can be installed without starting difficulties.
  • a stationary air cushion which may form between the impeller and the medium surface when filling the delivery line and the pump housing and which could prevent vortex formation is torn open by the blade 7 'raised by the section 7b as soon as the impeller 4 is set in rotation.
  • the free edges 7a of the non-raised blades 7 lie in a plane E which is perpendicular to the impeller axis 4a.
  • impellers are also known in which these free edges of the blades lie on a surface of revolution, in particular on a conical surface or a conical surface. In the case of such impellers, too, increasing one or a few blades brings the advantages mentioned, because the raised blades protrude beyond the rotational surface defined by the other blades and thus have a similar effect to the blade 7 ′ of the impeller 4 shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)
  • Molten Solder (AREA)
EP83110411A 1982-11-19 1983-10-19 Rotor pour pompe à tourbillon Withdrawn EP0109550A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH6744/82 1982-11-19
CH674482A CH657672A5 (de) 1982-11-19 1982-11-19 Laufrad fuer eine freistrompumpe.

Publications (2)

Publication Number Publication Date
EP0109550A2 true EP0109550A2 (fr) 1984-05-30
EP0109550A3 EP0109550A3 (fr) 1984-07-25

Family

ID=4314348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110411A Withdrawn EP0109550A3 (fr) 1982-11-19 1983-10-19 Rotor pour pompe à tourbillon

Country Status (3)

Country Link
EP (1) EP0109550A3 (fr)
CA (1) CA1189632A (fr)
CH (1) CH657672A5 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408810A1 (de) * 1983-03-10 1984-09-13 Ebara Corp., Tokio/Tokyo Vortex-pumpe
US6454522B2 (en) * 2000-03-31 2002-09-24 Enplas Corporation Impeller for circumferential current pump
WO2004065797A1 (fr) * 2003-01-17 2004-08-05 Ksb Aktiengesellschaft Pompe non colmatable
US20140003929A1 (en) * 2011-03-08 2014-01-02 Jean-Nicolas Favre Free-flow pump

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2200847B2 (de) * 1972-01-08 1972-09-21 Klein Schanzlin & Becker Ag Kreiselpumpe mit offenem radialrad
FR2173365A5 (fr) * 1972-02-21 1973-10-05 Bodin Andre Ets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2200847B2 (de) * 1972-01-08 1972-09-21 Klein Schanzlin & Becker Ag Kreiselpumpe mit offenem radialrad
FR2173365A5 (fr) * 1972-02-21 1973-10-05 Bodin Andre Ets

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408810A1 (de) * 1983-03-10 1984-09-13 Ebara Corp., Tokio/Tokyo Vortex-pumpe
FR2542385A1 (fr) * 1983-03-10 1984-09-14 Ebara Corp Pompe a tourbillons
US6454522B2 (en) * 2000-03-31 2002-09-24 Enplas Corporation Impeller for circumferential current pump
WO2004065797A1 (fr) * 2003-01-17 2004-08-05 Ksb Aktiengesellschaft Pompe non colmatable
US20140003929A1 (en) * 2011-03-08 2014-01-02 Jean-Nicolas Favre Free-flow pump
US9605678B2 (en) * 2011-03-08 2017-03-28 Egger Pumps Technology Ag Free-flow pump

Also Published As

Publication number Publication date
CH657672A5 (de) 1986-09-15
EP0109550A3 (fr) 1984-07-25
CA1189632A (fr) 1985-06-25

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19850606

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Inventor name: HEIMGARTNER, HANS

Inventor name: WIRZ, KARL