EP0731880B1 - Dispositif pour empecher la formation de tourbillons aux entrees de pompes - Google Patents

Dispositif pour empecher la formation de tourbillons aux entrees de pompes Download PDF

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Publication number
EP0731880B1
EP0731880B1 EP95900701A EP95900701A EP0731880B1 EP 0731880 B1 EP0731880 B1 EP 0731880B1 EP 95900701 A EP95900701 A EP 95900701A EP 95900701 A EP95900701 A EP 95900701A EP 0731880 B1 EP0731880 B1 EP 0731880B1
Authority
EP
European Patent Office
Prior art keywords
rib
inlet
base
inlet chamber
pump
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
EP95900701A
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German (de)
English (en)
Other versions
EP0731880A1 (fr
Inventor
Sönke BRODERSEN
Gunter Pfeiffer-Müller
Rüdiger KÖPP
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
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Filing date
Publication date
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Application filed by KSB AG filed Critical KSB AG
Publication of EP0731880A1 publication Critical patent/EP0731880A1/fr
Application granted granted Critical
Publication of EP0731880B1 publication Critical patent/EP0731880B1/fr
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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
    • F04D29/40—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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/688—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for liquid pumps
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

  • centrifugal pumps suck the medium via a vertically arranged inlet from a Inlet chamber, which is also referred to as a pump sump (KSB centrifugal pump lexicon, 1989, pages 88 and 89).
  • a such inlet chamber mainly serves to improve the Inlet conditions to the centrifugal pump, with it one is possible balanced, vortex-free inflow sought. This is before especially for specific high-speed pumps with propeller or Semi-axial wheel indispensable because this is due to interference in the Inflow react immediately.
  • the actual, tubular pump inlet is usually an inlet nozzle, also called a suction bell, upstream.
  • the inlet nozzle eliminates irregularities in the velocity distribution of the incoming liquid smoothed.
  • cones or crosses arranged in the pump inlet recommended.
  • JP-A-61-155699 In a known device for preventing Vortex formation for a pump with a vertical shaft (JP-A-61-155699) becomes an L-shaped partition suggested that from below the pump inlet running part merges into one on the rear wall of the Inlet chamber arranged part up to the height lowered ceiling of the inlet chamber is sufficient. To avoid air-drawing surface vortex is one below provided vortex protection strip attached to the ceiling.
  • Partitions, baffles and plates or vortex protection strips a special kind of eddies are not capable of avoid the surfaces on the inlet chamber Floor and wall, which arise as ground or underwater vortices be designated. That on the floor or wall surface bound end of such a vortex moves in one certain area back and forth while the other end in the Pump pulls in. Since the rotational speed at the center of the Underwater vortex is very large, the static drops there Pressure below the vapor pressure of the medium, with the result that the vortex forms as a steam-filled hose.
  • the aim of the invention is to prevent the Underwater whirling effort to a minimum to reduce. This is achieved through a facility that is in the Claim 1 is shown with their design limits.
  • the diameter (D) given here as a reference is not the diameter of the inlet nozzle, but that of the above the Inlet nozzle located tubular pump inlet.
  • the invention is based on the following finding:
  • Claim 2 calls one as an additional device rib arranged on the rear wall of the inlet chamber, the height of which and width within that for the bottom rib applicable limit values remain. According to claim 3 can the bottom and wall ribs into a single, L-shaped designed rib can be summarized.
  • the rib can also, as in claim 5 set out to run at an angle to the main stream.
  • the rib Incidentally, does not have to form a completely straight line; their course can deviate from a straight line according to claim 6. This can inter alia mean that the rib, as in claim 7 taught from two at an angle to each other There is thighs or that according to claim 8 in one Curve runs. In claim 9 it is pointed out that the cross section of the rib change over its course can.
  • the invention is based on various exemplary embodiments explained in more detail.
  • the inlet chamber 1 shown in FIGS. 1 to 3 is formed between two side walls 2 and one Rear wall 3. This projects vertically into the inlet chamber 1 arranged suction pipe of a pump inlet 4. At the lower end of the pump inlet 4, which has a diameter D, is one Inlet nozzle 5 is provided.
  • a rib 7 which can be made in one piece with the bottom 6 or attached to it as a separate part.
  • the cross-sectional shape of the rib 7 is arbitrary.
  • the FIG. 4 corresponding to the detail x of FIG. 2 shows only some of the possible forms here. It is essential, however, that all cross sections must remain within predetermined limits for the height h and width b in order to be able to develop their underwater vortex-preventing effect.
  • the values related to the diameter D of the pump inlet are: 0.055 ⁇ h / D ⁇ 0.29 0.045 ⁇ b / D ⁇ 0.39.
  • Height h and width b apply to one on the rear wall 3 arranged rib 8, as shown in FIG. 7.
  • a rib 8 is to be expected underwater vortices provided in addition to the rib 7.
  • the rib 8 is located on the in the direction of the main stream (each in the drawing indicated by an arrow) offset central axis 9 of the Pump inlet 4.
  • the length y of the rib 8 corresponds at least the distance H between the bottom 6 of the inlet chamber 1 and the Inlet opening of the pump inlet 4, which here through the Inlet nozzle 5 is formed.
  • the rib 7 runs in a straight line following the main stream Line.
  • the ribs 10 and 11 shown in FIGS. 5 and 6 have a different course, but also lead to Desired success: suppression of the floor area emerging underwater vortices.
  • the rib-shaped device according to the invention is not closed to be confused with the baffles mentioned at the beginning or Partitions, which are also below the pump inlet are aligned with the mainstream direction, but just a general equalization of the pump inflow cause.
  • the main flow is through partitions divided into two areas, each with the for the emergence of underwater vortices applicable boundary conditions occur.
  • the baffles form or partitions separate wall areas, on which in turn Underwater vortices can arise.

Claims (9)

  1. Dispositif pour empêcher la formation de tourbillons sur le fond (6) et la paroi arrière (3) de la chambre d'entrée (1) d'une pompe centrifuge, comportant une nervure (7) d'une section transversale quelconque, disposée sur le fond (6) de la chambre d'entrée (1) et qui traverse l'axe médian (9) prolongé de l'entrée de la pompe (4), dont la hauteur (h) et la largeur (b) et dont les deux extensions (x1, x2) qui partent de l'axe médian (9) prolongé de l'entrée de la pompe (4) ont les dimensions suivantes par rapport au diamètre (D) de l'entrée de la pompe:
    a) 0,055 < h/D < 0,29
    b) 0,045 < b/D < 0,39
    c) 0,45 < x1/D < ∞
    d) 0,45 < x2/D < ∞.
  2. Dispositif selon la revendication 1, comprenant une nervure (8) d'une section transversale quelconque, disposée sur la paroi arrière (3) de la chambre d'entrée (1) et qui s'étend sur l'axe médian (9) de l'entrée de la pompe (4) décalé dans la direction du flux principal, dont la hauteur (h) et la largeur (b) restent en deçà des valeurs limites données pour la nervure (7) disposée sur le fond (6), tandis que la longueur (y) correspond approximativement à la distance (H) entre le fond (6) de la chambre d'entrée (1) et l'ouverture d'entrée (5) de l'entrée de la pompe (4).
  3. Dispositif selon les revendications 1 et 2, comportant une nervure de configuration en forme de L, s'étendant sur le fond (6) et sur la paroi (3).
  4. Dispositif selon la revendication 1, comportant une nervure (7) disposée sur le fond (6) de la chambre d'entrée (1) et s'étendant dans la direction du flux principal.
  5. Dispositif selon la revendication 1, comportant une nervure (10) disposée sur le fond (6) de la chambre d'entrée et s'étendant à un certain angle (α) par rapport au flux principal.
  6. Dispositif selon la revendication 1, comportant une nervure disposée sur le fond (6) de la chambre d'entrée (1) et qui possède un prolongement s'écartant d'une ligne droite.
  7. Dispositif selon la revendication 6, dont la nervure (11) se compose de deux branches se trouvant à un angle (β) l'une par rapport à l'autre, l'angle (β) formé entre les deux branches valant entre 90° et 270°.
  8. Dispositif selon la revendication 6, dont la nervure s'étend suivant une ligne courbe.
  9. Dispositif selon les revendications 1 et 2, comportant une nervure dont la section transversale varie sur son prolongement.
EP95900701A 1993-11-30 1994-11-10 Dispositif pour empecher la formation de tourbillons aux entrees de pompes Expired - Lifetime EP0731880B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4340711 1993-11-30
DE4340711A DE4340711A1 (de) 1993-11-30 1993-11-30 Einrichtung zur Verhinderung von Unterwasserwirbeln an Pumpeneinläufen
PCT/EP1994/003720 WO1995015440A1 (fr) 1993-11-30 1994-11-10 Dispositif pour empecher la formation de tourbillons aux entrees de pompes

Publications (2)

Publication Number Publication Date
EP0731880A1 EP0731880A1 (fr) 1996-09-18
EP0731880B1 true EP0731880B1 (fr) 1998-07-15

Family

ID=6503761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95900701A Expired - Lifetime EP0731880B1 (fr) 1993-11-30 1994-11-10 Dispositif pour empecher la formation de tourbillons aux entrees de pompes

Country Status (4)

Country Link
EP (1) EP0731880B1 (fr)
CN (1) CN1051359C (fr)
DE (2) DE4340711A1 (fr)
WO (1) WO1995015440A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105139746A (zh) * 2015-08-27 2015-12-09 武汉大学 一种泵站进水池漩涡实验台

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10003517C2 (de) * 2000-01-27 2001-11-22 Siemens Ag Betriebsgebäude für eine Anlage und Verfahren zum Betrieb eines Betriebsgebäudes
US8784053B2 (en) * 2010-12-21 2014-07-22 Hamilton Sundstrand Corporation Fan shield and bearing housing for air cycle machine
CN105401616B (zh) * 2015-12-18 2017-07-25 江苏省水利工程科技咨询股份有限公司 一种开敞式进水池水下异形盖板消涡装置及其方法
CN105697424B (zh) * 2016-01-19 2019-01-08 江苏大学 一种泵站用防旋涡装置
CN105625557B (zh) * 2016-01-22 2018-01-12 赛莱默水处理系统（沈阳）有限公司 一体化污水处理泵站
DE202016101589U1 (de) 2016-03-23 2016-04-22 Homa Pumpenfabrik Gmbh Einlaufkammer für eine Axialpumpe
JP6653204B2 (ja) * 2016-03-30 2020-02-26 三菱日立パワーシステムズ株式会社 取水ピット及びプラント
CN106381832B (zh) * 2016-09-12 2018-04-03 河海大学 一种集漩涡消涡和发电于一体的实验模拟装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB785926A (en) * 1955-06-03 1957-11-06 Sulzer Ag Pumping plants
DE2137637B2 (de) * 1971-07-28 1977-10-27 Klein Schanzlin & Becker Ag Leitvorrichtung fuer einlaufkammern schnellaeufiger pumpen
DE2933904C2 (de) * 1979-08-22 1985-03-14 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Einlaufkrümmer
JPS61155699A (ja) * 1984-12-27 1986-07-15 Fuji Electric Co Ltd 立軸ポンプの渦流防止装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105139746A (zh) * 2015-08-27 2015-12-09 武汉大学 一种泵站进水池漩涡实验台
CN105139746B (zh) * 2015-08-27 2017-06-09 武汉大学 一种泵站进水池漩涡实验台

Also Published As

Publication number Publication date
CN1131453A (zh) 1996-09-18
EP0731880A1 (fr) 1996-09-18
DE4340711A1 (de) 1995-06-01
DE59406462D1 (de) 1998-08-20
WO1995015440A1 (fr) 1995-06-08
CN1051359C (zh) 2000-04-12

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