EP1978261B1 - Groupe motopompe - Google Patents

Groupe motopompe Download PDF

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Publication number
EP1978261B1
EP1978261B1 EP08290249.5A EP08290249A EP1978261B1 EP 1978261 B1 EP1978261 B1 EP 1978261B1 EP 08290249 A EP08290249 A EP 08290249A EP 1978261 B1 EP1978261 B1 EP 1978261B1
Authority
EP
European Patent Office
Prior art keywords
pump unit
wall
edge
pump
external wall
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.)
Active
Application number
EP08290249.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1978261A1 (fr
Inventor
Louis Symoens
Martial Smis
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 SAS
Original Assignee
KSB SAS
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 SAS filed Critical KSB SAS
Priority to PL08290249T priority Critical patent/PL1978261T3/pl
Priority to SI200831913T priority patent/SI1978261T1/en
Publication of EP1978261A1 publication Critical patent/EP1978261A1/fr
Application granted granted Critical
Publication of EP1978261B1 publication Critical patent/EP1978261B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating

Definitions

  • the present invention relates to pump units and, more particularly, to those for sucking the floats, especially for pumping black water or black water.
  • Black water or sewage is wastewater containing waste water.
  • a pump unit of this kind having a vertical axis. It has a bottom of suction.
  • the inner wall of the suction bottom delimits a suction inlet.
  • the outer wall of the suction bottom defines a feeding zone.
  • a first portion of the free bottom edge of the outer wall is at a lower level than the free bottom edge of the inner wall.
  • a vortex prevention device placed in a sump and which combines with a pump.
  • the invention relates to a motor pump unit of the type mentioned above, in which the suction symmetry is kept for the greater part of the operation of the pump, while having a suction level in the sump as low as possible, but without needing a complicated and expensive arrangement.
  • the lower edge of a second portion of the outer wall is at a higher level than the lower edge of the inner wall.
  • the second portion of the outer wall is inclined with respect to the axis. This makes it possible to obtain a more gradual gradient of speed for the pumping of the floats.
  • the angle of inclination is preferably between 30 ° and 60 °.
  • the second portion has a peripheral length of 10 to 40% of the sum of the peripheral lengths of the first portion and the second portion of the free lower edge. It is most preferred that this percentage be about 25 to 35%.
  • the second part is on the side of the group opposite to that where the discharge pipe of the pump set is located. The pumping of the floats is thus facilitated because it is not impeded by the discharge pipe and the foot of the seat if there is one.
  • the pump unit represented at figure 1 comprises a shaft 1 defining the vertical axis of the group, the shaft 1 forms the rotor of an electric motor whose stator carries the mark 2.
  • On the shaft 1 is wedged in the lower part an impeller 3.
  • Below the impeller is fixed by screws 4 a suction bottom 5.
  • the bottom 5 has a vertical annular outer wall 6 and a vertical annular inner wall 7.
  • the inner wall is closer to the shaft 1 in the horizontal direction, the wall 6 being further away.
  • the wall 7 defines a suction opening.
  • the outer wall 6 delimits a suction zone 10.
  • a first portion 11 of the lower free edge 12 of the outer wall 6 is at a lower level than the free lower edge 13 of the inner wall.
  • the free lower edge 14 of a second portion 15 of the outer wall 6 is at a level higher than the lower edge 13 of the inner wall 7.
  • the second portion 15 is inclined at an angle of 30 ° to 60 ° and its center angle is 120 °. This small angle gives a great speed to the water which causes the floats that are well sucked.
  • the liquid sucked by the suction port is discharged by a discharge pipe 16.
  • the group is carried on a tripod 17.
  • the second part 15 is on the side of the opposite group to the one where the discharge pipe 16 is located.
  • a group according to the invention is able to efficiently pump the floats without the need to tilt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP08290249.5A 2007-04-06 2008-03-14 Groupe motopompe Active EP1978261B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL08290249T PL1978261T3 (pl) 2007-04-06 2008-03-14 Zestaw motopompy
SI200831913T SI1978261T1 (en) 2007-04-06 2008-03-14 Pumping unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0702531A FR2914704B1 (fr) 2007-04-06 2007-04-06 Groupe motopompe aspirant les flottants.

Publications (2)

Publication Number Publication Date
EP1978261A1 EP1978261A1 (fr) 2008-10-08
EP1978261B1 true EP1978261B1 (fr) 2017-10-25

Family

ID=38796171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08290249.5A Active EP1978261B1 (fr) 2007-04-06 2008-03-14 Groupe motopompe

Country Status (8)

Country Link
EP (1) EP1978261B1 (da)
DK (1) DK1978261T3 (da)
ES (1) ES2655244T3 (da)
FR (1) FR2914704B1 (da)
HU (1) HUE035403T2 (da)
PL (1) PL1978261T3 (da)
PT (1) PT1978261T (da)
SI (1) SI1978261T1 (da)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2594184B1 (fr) * 1986-02-07 1989-10-27 Valeo Pompe a liquide, notamment pompe a eau pour vehicule automobile
DE3813654A1 (de) * 1988-04-22 1989-11-02 Licentia Gmbh Umwaelzpumpe
JP2872413B2 (ja) * 1990-12-26 1999-03-17 アスモ株式会社 ウォッシャポンプ
DE4119131A1 (de) * 1991-06-11 1992-12-17 Kloeckner Humboldt Deutz Ag Kreiselpumpe
US6533543B2 (en) * 2000-02-02 2003-03-18 Ebara Corporation Vortex prevention apparatus in pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
PT1978261T (pt) 2018-01-30
FR2914704B1 (fr) 2009-05-22
HUE035403T2 (en) 2018-05-02
EP1978261A1 (fr) 2008-10-08
PL1978261T3 (pl) 2018-05-30
SI1978261T1 (en) 2018-04-30
FR2914704A1 (fr) 2008-10-10
DK1978261T3 (da) 2018-01-29
ES2655244T3 (es) 2018-02-19

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