EP2138723B1 - Pompe centrifuge dotée d'un rotor de courant libre - Google Patents

Pompe centrifuge dotée d'un rotor de courant libre Download PDF

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Publication number
EP2138723B1
EP2138723B1 EP09007443.6A EP09007443A EP2138723B1 EP 2138723 B1 EP2138723 B1 EP 2138723B1 EP 09007443 A EP09007443 A EP 09007443A EP 2138723 B1 EP2138723 B1 EP 2138723B1
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EP
European Patent Office
Prior art keywords
flow
centrifugal pump
influencing means
pump according
influencing
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
EP09007443.6A
Other languages
German (de)
English (en)
Other versions
EP2138723A2 (fr
EP2138723A3 (fr
Inventor
Rolf Witzel
Christoph Jäger
Heinrich Braun
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 SE and Co KGaA
Original Assignee
KSB AG
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Filing date
Publication date
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Publication of EP2138723A2 publication Critical patent/EP2138723A2/fr
Publication of EP2138723A3 publication Critical patent/EP2138723A3/fr
Application granted granted Critical
Publication of EP2138723B1 publication Critical patent/EP2138723B1/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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal 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
    • F04D29/18—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
    • F04D29/66—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
    • 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 invention relates to a centrifugal pump, with a free-flow impeller mounted in a housing, wherein between a suction-side housing wall and the vortex impeller a blade-less space is arranged and the centrifugal pump is provided with a device for preventing the tearing of the flow, wherein at the suction-side housing wall at least one, in the blade-free space above, one or more parts, flow-influencing means is arranged.
  • the DE 14 53 735 A1 shows a centrifugal pump for conveying a mixture of liquids and solids. Opposite the blade edges of the impeller guide devices are arranged on the suction-side housing wall. The arrangement of running and guide wheels hydraulically favorable flow conditions are achieved, which makes it difficult to set admixtures.
  • the invention is based on the problem of providing a centrifugal pump with better conveying properties in the case of pumped media with constituents which tend to block.
  • the flow-influencing means is provided with at least one rupture means, wherein the flow-influencing means is provided with sharp edges and / or sharp fangs.
  • a further embodiment according to which the flow-influencing agent is provided with hardened edges, improves the effect and increases the long-term stability.
  • the flow-influencing means is arranged in the region of a suction opening in an arcuate manner on a partial circumference as a rib extending in the circumferential direction.
  • one or more tear means are arranged in the region of the contact lines of mutually different diameters and arranged in the blade-less space of mutually facing rib surfaces.
  • the flow-influencing means may have tearing means at its inner diameter and / or at its outer diameter. These can be incorporated by material removal from a rib body, for example by milling. A two-sided arrangement of tear means on a rib has proven to be particularly useful in experiments.
  • the flow-influencing agent has tear points and / or tear points.
  • the tear points and / or the tear points can be formed by edges arranged at an angle to one another.
  • the edge regions of a flow-influencing means are provided with a toothing.
  • tear or fangs such as pointed fangs and / or fangs, in its outer region are formed by an edge and thereby flattened.
  • a flow-influencing means has a plurality of tear points and / or tear points.
  • the side of the flow-influencing means facing the impeller forms a planar surface.
  • a continuous zone results in a central region of the flow-influencing means such that catching of a solid conveying component, such as a lobe, is prevented.
  • the flow-influencing means are provided with means of removal, which protrude into the blade-less space.
  • These may be, for example, pins, inserts or similar tear means, which are attached for example by screwing or clamping with the flow-influencing means.
  • an arc-shaped flow-influencing means has a maximum extension corresponding to 180 degrees of the housing circumference.
  • a maximum extension corresponding to 180 degrees of the housing circumference.
  • the flow-influencing means may have tapered contour curves. Such chamfers, which are particularly useful on the flow-facing side of a flow-influencing agent prevent laying a solid delivery component on the flow-influencing means.
  • the suction-side housing wall and the flow-influencing means may be formed as part of a housing cover. This allows, if necessary, a conversion of an existing free-flow pump and a quick and easy replacement of a housing cover. Thus, a centrifugal pump can also be retrofitted easily to an operation with tipping prone conveying fluids.
  • the flow-influencing means is releasably secured.
  • a centrifugal pump can therefore only be equipped with a flow-flowing means with tear means when needed. This is given by the releasable attachment a problem-free case by case adaptation to the respective counselkeitszusammen deren.
  • Various shapes and / or mounting positions have proven successful in practical experiments.
  • the Fig. 1 shows a centrifugal pump 1 for the promotion of a with tipping prone conveyor components interspersed delivery fluid.
  • the centrifugal pump 1 has a freely rotating impeller 3 arranged in a housing 2 with impeller blades 4, which is connected to a drive shaft 5. Between a suction-side housing wall 6 and the free-flow impeller 3, a blade-less space 7 is arranged.
  • the centrifugal pump 1 is connected to a - not shown here - discharge nozzle to a pipeline. Via a suction opening 9, the pumped liquid flows to the pump and it could also be connected to a - not shown here - suction line.
  • the impeller blades 4 opposite to the suction-side housing wall 6, a flow-influencing means 10 is arranged. In this case, a predominant part of the suction-side housing wall 6 is formed in this embodiment by a removable suction-side housing cover 11, with which the - here integrally formed - flow-influencing means 10 is connected.
  • the flow-influencing means 10 is here provided with a plurality of tear means 21, 23 in the form of sharp edges, tear points, tear points, various recesses and / or undercuts.
  • the flow-influencing means 10 and the tear means 21, 23 may have different shapes. Feeding-prone conveying components are torn by the tearing means 21, 23 in operation of the centrifugal pump 1 and crushed such that a promotion of the same through the pump outlet or discharge nozzle is possible.
  • the flow-influencing means 10 causes by its arrangement on the suction-side housing wall 6, a local reduction of the shovelless space 7, which are effectively torn and crushed to the rotating impeller 3 applying solid conveying components, such as cloths or nonwovens.
  • Various arrangements of the flow-axis flowing means 10 with its tear means 21, 23 are provided.
  • a straight flow-influencing means 10 for example purely radially, be arranged in a certain angle relative to a purely radial arrangement employed position or in a bent or arcuate execution of a flow-influencing means annular.
  • the Centrifugal pump 1 may have a variety of installation positions and is not limited to the vertical variant shown here.
  • the Fig. 2a and 2b show a suction-side housing cover 11 of a centrifugal pump in two perspective views.
  • the suction-side housing cover 11 has a suction opening 9 and three attachment locations 14, 15, 16 for attachment of the suction-side housing cover 11 on the housing 2 of the centrifugal pump 1.
  • On the suction-side housing cover 11 is a strömungsbeeinlendes means 10 in the region of the suction opening 9 arcuate on a partial circumference than arranged in the circumferential direction rib, wherein a plurality of tear means 21, 23 are arranged in the region of located on different diameters and arranged in the blade-less space lines of contact of mutually facing rib surfaces.
  • the tearing means 21 are on an inner side 22 or on the inner diameter of the flow-influencing means 10 and the tearing means 23 are formed on an outer side 24 or on the outer diameter of the flow-influencing means 10.
  • the flow-influencing means 10 has a plurality of tear points 26 and / or tear points.
  • the tear points 26 are formed by edges 28 arranged at an angle to each other, resulting in pointed fangs 30 on the inner diameter and pointed fangs 31 on the outer diameter.
  • the impeller 3 facing side of the flow-influencing means 10 has a flat surface 32. This results in a continuous zone between the fangs 30 in the region of the inner diameter and the fangs 31 in the region of the outer diameter such that a catching of solid conveying components is prevented.
  • the invention is not limited to such an embodiment, but it is provided, for example, that the flow-influencing means are provided with tear means that can protrude further into the blade-less space.
  • FIGS. 3a to 3e show the flow-influencing means 10 in several views. It shows the Fig. 3a a bottom view of the flow-influencing means 10.
  • the flow-influencing means 10 has two mounting holes 33, 34 for attachment to a housing cover.
  • a housing cover can be retrofitted with a flow-influencing agent with tear means or retrofitted.
  • Fig. 3b shows a front view of the flow-influencing means 10.
  • the flow-influencing means 10 has at one end beveled contour curves. It has a bevelled contour profile 35 and a bevelled contour curve 36, which results from a circumferentially increasing axial extent of the flow-influencing agent.
  • Fig. 3c shows the flow-influencing means 10 in its plan view.
  • the fangs 30 formed or formed on the inner diameter and the fangs 31 formed on the outer diameter are recognizable.
  • a middle region between the fangs 30, 31 at the inner diameter or at the outer diameter results in a over the entire extent of the flow-influencing agent 10 extending flat surface 32.
  • this side of the flow-influencing means 10 faces the impeller 3.
  • This flat zone 32 prevents entanglement of solid conveying components, such as cloths or nonwovens.
  • Fig. 3d and Fig. 3e show two sections through the flow-influencing means 10th
  • Fig. 4 shows the centrifugal pump 1 in a front view, in the illustration a cut-out area around the flow-influencing means 10 on the housing cover 11 is present to show the position of the flow-influencing means 10 within the pump housing 2 with its discharge nozzle 8 ,.
  • the position of the flow-influencing means 10 for - here spiral-shaped - housing 2 of the centrifugal pump 1 can be seen.
  • the flow-influencing means 10 can be arranged at a plurality of positions within the blade-less space 7. In tests various positions of flow-influencing agents were tested with rupture agents.
  • Fig. 4 shows a position in which the flow-influencing means 10 is arranged in a first spiral half 41 of the volute casing of the centrifugal pump 1. Due to the attachment locations 14, 15, 16 for fastening the suction-side housing cover 11, it is also possible to choose a twisted by 120 degrees attachment of the suction-side housing cover 11 on the centrifugal pump housing 2 with the same housing cover 11, whereby a slight adaptation to a pumped liquid, a Installation position and / or an operating point of the centrifugal pump takes place.
  • the flow-influencing means illustrated in the exemplary embodiments is to be understood as a flow-influencing means of exemplary shape.
  • Other one- or multi-part shapes of the flow-influencing agent also use the invention.
  • the invention is not limited to centrifugal pumps with a spiral housing, but is nevertheless used in centrifugal pumps with a ring housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (12)

  1. Pompe centrifuge (1), comprenant une roue vortex (3) disposée de manière rotative dans un corps (2), un espace sans pale (7) étant réalisé entre une paroi de corps du côté de l'aspiration (6) et la roue vortex (3) et la pompe centrifuge (1) étant munie d'un dispositif pour éviter la rupture de l'écoulement, au moins un moyen (10) influençant l'écoulement, en une ou plusieurs parties, faisant saillie dans l'espace sans pale (7), étant disposé au niveau de la paroi de corps du côté de l'aspiration (6), caractérisée en ce que le moyen (10) influençant l'écoulement est pourvu d'au moins un moyen de rupture (21, 23), le moyen (10) influençant l'écoulement étant muni d'arêtes vives et/ou de dents de rupture pointues (30, 31).
  2. Pompe centrifuge selon la revendication 1, caractérisée en ce que le moyen (10) influençant l'écoulement est disposé dans la région d'une ouverture d'aspiration (9) sous forme courbe sur une périphérie partielle en tant qu'ailette s'étendant dans la direction périphérique.
  3. Pompe centrifuge selon la revendication 2, caractérisée en ce qu'un ou plusieurs moyens de rupture (21, 23) sont disposés dans la région des lignes de contact de surfaces d'ailettes situées les unes au-dessus des autres, se trouvant sur des diamètres différents et disposées dans l'espace sans pale.
  4. Pompe centrifuge selon les revendications 1 à 3, caractérisée en ce que le moyen (10) influençant l'écoulement possède des points de rupture (26) et/ou des zones de rupture.
  5. Pompe centrifuge selon la revendication 4, caractérisée en ce que les points de rupture (26) et/ou les zones de rupture sont formés par des arêtes (28) disposées de manière angulaire les unes par rapport aux autres.
  6. Pompe centrifuge selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le côté tourné vers la roue (3), du moyen (10) influençant l'écoulement, forme une surface plane (32).
  7. Pompe centrifuge selon l'une quelconque des revendications 1 à 6, caractérisée en ce que des moyens de rupture sont montés sur le moyen (10) influençant l'écoulement, lesquels pénètrent dans l'espace sans pale (7).
  8. Pompe centrifuge selon l'une quelconque des revendications 1 à 7, caractérisée en ce que le moyen (10) influençant l'écoulement est disposé à l'intérieur d'un corps spiral dans une première moitié de spirale (41).
  9. Pompe centrifuge selon l'une quelconque des revendications 1 à 8, caractérisée en ce que le moyen (10) influençant l'écoulement présente une étendue maximale correspondant à 180° du pourtour du corps.
  10. Pompe centrifuge selon l'une quelconque des revendications 1 à 9, caractérisée en ce que le moyen (10) influençant l'écoulement présente des allures de contour biseautées (35, 36).
  11. Pompe centrifuge selon l'une quelconque des revendications 1 à 10, caractérisée en ce que la paroi de corps du côté de l'aspiration (6) et le moyen (10) influençant l'écoulement sont réalisés sous forme de composant d'un couvercle de corps (11).
  12. Pompe centrifuge selon l'une quelconque des revendications 1 à 11, caractérisée en ce que le moyen (10) influençant l'écoulement est fixé de manière amovible.
EP09007443.6A 2008-06-27 2009-06-05 Pompe centrifuge dotée d'un rotor de courant libre Active EP2138723B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008030112A DE102008030112A1 (de) 2008-06-27 2008-06-27 Kreiselpumpe mit Freistromlaufrad

Publications (3)

Publication Number Publication Date
EP2138723A2 EP2138723A2 (fr) 2009-12-30
EP2138723A3 EP2138723A3 (fr) 2010-07-28
EP2138723B1 true EP2138723B1 (fr) 2017-09-13

Family

ID=40873240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09007443.6A Active EP2138723B1 (fr) 2008-06-27 2009-06-05 Pompe centrifuge dotée d'un rotor de courant libre

Country Status (3)

Country Link
EP (1) EP2138723B1 (fr)
CN (1) CN101614209B (fr)
DE (1) DE102008030112A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8998582B2 (en) * 2010-11-15 2015-04-07 Sundyne, Llc Flow vector control for high speed centrifugal pumps
DE102015212654B4 (de) * 2015-07-07 2021-10-21 BSH Hausgeräte GmbH Haushaltsgerät
DE102019004263A1 (de) * 2019-06-18 2020-12-24 KSB SE & Co. KGaA Kreiselpumpe und Verfahren zur Zustandserkennung einer Kreiselpumpe

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453735A1 (de) 1962-06-01 1969-01-23 Eta Corp Turbo-resp. Kreiselradpumpe
DE1453738A1 (de) * 1963-01-28 1969-01-30 Eisele Soehne Franz Schneidwerk fuer Jauchepumpen
DE1528651B2 (de) * 1965-01-23 1975-12-18 Albert 5204 Lohmar Blum Schmutzwasserpumpe
DE7636700U1 (de) 1976-11-22 1977-10-06 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Kreiselpumpe mit einem offenen laufrad
DE2714376C3 (de) * 1977-03-31 1980-08-28 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Kreiselpumpe mit offenem Laufrad
SE525412C2 (sv) * 2003-10-20 2005-02-15 Itt Mfg Enterprises Inc Centrifugalpump
DE202006005073U1 (de) 2006-03-28 2006-06-08 Ksb Aktiengesellschaft Kreiselpumpe mit Freistromlaufrad

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
CN101614209B (zh) 2014-12-10
EP2138723A2 (fr) 2009-12-30
DE102008030112A1 (de) 2009-12-31
EP2138723A3 (fr) 2010-07-28
CN101614209A (zh) 2009-12-30

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