EP1903216B1 - Zentrifugalpumpe und deren Anwendung - Google Patents

Zentrifugalpumpe und deren Anwendung Download PDF

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Publication number
EP1903216B1
EP1903216B1 EP06120843A EP06120843A EP1903216B1 EP 1903216 B1 EP1903216 B1 EP 1903216B1 EP 06120843 A EP06120843 A EP 06120843A EP 06120843 A EP06120843 A EP 06120843A EP 1903216 B1 EP1903216 B1 EP 1903216B1
Authority
EP
European Patent Office
Prior art keywords
diameter
rotor
suction
ratio
centrifugal 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.)
Active
Application number
EP06120843A
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English (en)
French (fr)
Other versions
EP1903216A1 (de
Inventor
Hasan Hüseyin Bugdayci
Cornelis Hendrik Van Den Berg
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.)
IHC Holland lE BV
Original Assignee
IHC Holland lE BV
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 IHC Holland lE BV filed Critical IHC Holland lE BV
Priority to EP06120843A priority Critical patent/EP1903216B1/de
Priority to AT06120843T priority patent/ATE447110T1/de
Priority to DE602006010075T priority patent/DE602006010075D1/de
Priority to CN2007101821975A priority patent/CN101201055B/zh
Publication of EP1903216A1 publication Critical patent/EP1903216A1/de
Application granted granted Critical
Publication of EP1903216B1 publication Critical patent/EP1903216B1/de
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
    • F04D29/2205—Conventional flow pattern
    • F04D29/2216—Shape, geometry
    • 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
    • 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, in particular for the pumping of a mixture of substances possibly including stones and/or pebbles, comprising:
  • a centrifugal pump of this type is known.
  • the rotor rotates about the axial rotation axis.
  • the mass to be pumped is forced radially outward into the pump housing under the influence of centrifugal forces.
  • Said mass is then entrained in the circumferential direction of the pump housing toward the tangential outlet spout of the pump housing.
  • the junction between the inner wall of the tangential outlet and the inside of the circumferential wall of the housing defines what is known as a cutwater.
  • the pumped mass which, after leaving the rotor, is entrained in the circumferential direction of the housing flows largely out of the tangential outlet of the housing.
  • a small amount of the entrained mass recirculates, i.e. flows along the cutwater back into the pump housing.
  • Said centrifugal pump can be used in dredging operations. If the centrifugal pump is located on board a dredging ship, such as a cutter suction dredger, the centrifugal pump has to fetch a loose mixture of substances, possibly including stones and/or pebbles, from the sea floor. The pump must have sufficient suction capacity to do this. Said mixture of substances, possibly including stones and/or pebbles, then flows through the centrifugal substances, possibly including stones and/or pebbles, then flows through the centrifugal pump. In order to prevent blockage, said stones and/or pebbles have to be able to pass through the pump. A wide pump having few blades is suitable for this purpose. However, by widening the pump and reducing the number of blades, the suction characteristics are adversely affected.
  • US 2005/0045757 which is considered the closest prior art to the subject-matter of claim 1, discloses a centrifugal pump of the chopper type, which is configured to process solid waste materials such as medical waste, municipal waste and food-processing waste.
  • the chopper pump has an impeller that is structured to contact a cutting element positioned adjacent the vanes of the impeller to exert a cutting of chopping action on the solid waste material entering the pump.
  • An object of the invention is to provide an improved centrifugal pump.
  • this object is achieved in that the ratio between the spherical diameter Bol and the suction diameter D 2 is greater than 0.43, and the ratio between the width B w of the rotor and the suction diameter D z is greater than 0.43, and the ratio between the external diameter D w of the rotor and the suction diameter D z is between 2.3 and 2.5.
  • the centrifugal pump according to the invention has a special hydraulic configuration.
  • the pump has a larger spherical passage and better suction characteristics than known pumps having a comparable suction diameter.
  • the centrifugal pump according to the invention is accordingly suitable for conveying very coarse materials, while the risk of blockage is minimal.
  • the ratio between the spherical diameter Bol and the suction diameter D z is approximately 0.5.
  • the ratio between the width B w of the rotor and the suction diameter D z is approximately 0.5
  • the ratio between the external diameter D w of the rotor and the suction diameter D z is approximately 2.4.
  • the spout-shaped outlet of the pump housing has a narrowest passage with a throat diameter D k , the ratio between the throat diameter D k of the spout-shaped outlet and the suction diameter D z being between 0.5 and 0.7. Said ratio between the throat diameter D k of the spout-shaped outlet and the suction diameter D z is, for example, approximately 0.68.
  • the spout-shaped outlet may, at the head end thereof, define a press diameter D p , the ratio between the press diameter D p and the suction diameter D z being greater than 0.7 or 0.75.
  • the invention also relates to the use of a centrifugal pump as described above.
  • the specific rotational speed of the pump is, for example, between 0.05 and 0.12. For example: if the rotational speed of the rotor is 302 revolutions per minute, the flow rate 4.4 m 3 /s and the pressure differential 610 kPa, then the specific rotational speed is 0.086.
  • the centrifugal pump according to the invention is denoted in its entirety in figures 1 and 2 by reference numeral 1.
  • the centrifugal pump 1 comprises a pump housing 2 shaped like a volute (spiral casing).
  • the pump housing 2 has a circumferential wall 3 and a spout-shaped outlet 5 attached tangentially to the circumferential wall 3 of the pump housing 2.
  • the junction between the inner surface of the tangential outlet 5 and the inner surface of the circumferential wall 3 of the pump housing 2 defines what is known as a cutwater 4.
  • the pump housing 2 also has an axial inlet 6.
  • a rotor 7 is attached in the pump housing 2 such that it may rotate about an axial rotation axis A.
  • the rotor 7 has a central boss 9 which may be fastened to a drive shaft (not wall for delimiting the flow within the rotor 7.
  • the rotor has a suction shield 12 which defines a second wall for delimiting the flow within the rotor 7.
  • the suction shield 12 has an axial supply 14 which is aligned with the axial inlet of the pump housing 2.
  • a plurality of rotor blades 15 are fastened between the shields 11, 12.
  • the rotor 7 comprises three rotor blades 15.
  • the rotor blades 15 each extend substantially radially to the rotation axis A.
  • Each rotor blade 15 comprises a radial inner end 18 and a radial outer end 17.
  • the circumferential channel 19 has a passage surface area which increases somewhat in the circumferential direction from the cutwater 4 toward the outlet 5.
  • the characteristic dimensions of the centrifugal pump 1 are indicated in figures 1 and 2 . These characteristic dimensions largely determine the characteristics of the pump.
  • the rotor 7 has an outermost diameter D w which is defined by the radial outer edges of the shields 11, 12.
  • the rotor 7 has a width B w extending between the mutually facing surfaces of the shaft shield 11 and the suction shield 12.
  • the axial supply 14 of the rotor 7 defines a suction diameter D z .
  • An inlet pipe can be connected to the axial inlet 16 of the pump housing 2.
  • the centrifugal pump 1 also has what is known as a spherical passage Bol which is defined by the diameter of the largest sphere able to pass between the rotor blades.
  • a throat diameter D k which is defined by the narrowest passage of the spout-shaped outlet 5 of the pump housing 2. Said narrowest passage is located in proximity to the cutwater 4.
  • the spout-shaped outlet 5 also has a press diameter Dp located at the tip thereof.
  • the distance, extending parallel to the centre line B of the outlet 5, between the crossing 4 and the level of the rotation axis A is indicated by the parameter T.
  • the thickness of the circumferential channel 19 at the location of the cutwater 4 is represented in Figure 1 by V.
  • the characteristic dimensions of the centrifugal pump 1 are matched to one another in such a way that the ratio between the spherical diameter Bol and the suction diameter D z is greater than 0.43, the ratio between the width B w of the rotor and the suction diameter D z is greater than 0.43, and the ratio between the external diameter D w of the rotor and the suction diameter D z is between 2.3 and 2.5.
  • the ratio between the spherical diameter Bol and the suction diameter D z and the ratio between the width B w of the rotor and the suction diameter D z are both approximately 0.5, whereas the ratio between the external diameter D w of the rotor and the suction diameter D z is approximately 2.4.
  • the ratio between the throat diameter D k of the spout-shaped outlet and the suction diameter D z is between 0.5 and 0.7 - in this illustrative embodiment, approximately 0.68.
  • the ratio between the press diameter D p and the suction diameter D z is in this case greater than 0.75.
  • the V/D z value is, in accordance with the invention, preferably greater than 0.285 - for example, 0.3.
  • the distance T is, for example, almost as great as the suction diameter D z .
  • the characteristic dimensions of the centrifugal pump 1 are, in particular: Parameter D w B w D z D p D k V T Bol Dimensions (mm) 2640 550 1100 850 750 330 1095 550
  • the centrifugal pump 1 has a hydraulic design which is particularly suitable for the pumping of a dredging mixture including stones and/or pebbles. Compared to known pumps, comparatively large stones and/or pebbles are able to pass through the centrifugal pump 1, so the risk of blockage is reduced. At the same time, this special hydraulic design of the centrifugal pump 1 ensures that the suction capacity thereof is sufficiently great to be able to pick up stones and/or pebbles of this type from the sea floor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Saccharide Compounds (AREA)

Claims (9)

  1. Zentrifugalpumpe (1), insbesondere zum Pumpen einer Mischung aus Substanzen, die möglicherweise Steine und/oder Felsen enthalten, umfassend:
    - ein Spiralpumpengehäuse (2) mit einem axialen Einlass (6) und einem tangential an der Umfangswandung (3) des Pumpengehäuses (2) angebrachten trichterförmigen Auslass (5),
    - einen Rotor (7), der so im Pumpengehäuse (2) angeordnet ist, dass er um eine Axialrotationsachse A rotieren kann, der Rotor (7) ist mit einer zentralen Nabe (9), einem an der Nabe (9) befestigtem Wellenschild (11) und einer Vielzahl von sich im Wesentlichen transversal zur Rotationsachse A zwischen einem radialen äußeren Ende (17) und einem radialen inneren Ende (18) erstreckenden Rotorschaufeln (15) versehen ist, und wobei der Rotor (7) einen äußersten Durchmesser Dw hat, und wobei die Rotorblätter (15) einen dem Durchmesser des größten Kreises, der zwischen zwei benachbarte Rotorblätter (15) eingeführt werden kann, entsprechenden Kreisdurchmesser Bol definieren,
    dadurch gekennzeichnet, dass der Rotor (7) mit einem Saugschild (12) versehen ist, das so angeordnet ist, dass es axial von dem Wellenschild (11) beabstandet ist, das Saugschild (12) hat eine mit dem axialen Einlass (6) des Pumpengehäuses (2) fluchtende Axialzuführung (14), und die Rotorschaufeln (15) sind zwischen den Schilden (11, 12) befestigt, und die Schilde (11, 12) definieren eine sich zwischen einander zugewandten Oberflächen des Wellenschilds (11) und des Saugschilds (12) erstreckende Breite Bw des Rotors (7), und die Axialzuführung (14) des Rotors (7) hat einen Saugdurchmesser Dz, und das Verhältnis zwischen dem Kreisdurchmesser Bol und dem Saugdurchmesser Dz ist größer als 0,43, und das Verhältnis zwischen der Breite Bw des Rotors (7) und des Saugdurchmessers Dz ist größer als 0,43, und das Verhältnis zwischen dem äußeren Durchmesser Dw des Rotors (7) und des Saugdurchmessers Dz beträgt zwischen 2,3 und 2,5.
  2. Zentrifugalpumpe nach Anspruch 1, wobei das Verhältnis zwischen dem Kreisdurchmesser Bol und dem Saugdurchmesser Dz ungefähr 0,5 beträgt.
  3. Zentrifugalpumpe nach Anspruch 1 oder 2, wobei das Verhältnis zwischen der Breite Bw des Rotors (7) und dem Saugdurchmesser Dz ungefähr 0,5 beträgt.
  4. Zentrifugalpumpe nach einem der voranstehenden Ansprüche, wobei das Verhältnis zwischen dem äußeren Durchmesser Dw des Rotors (7) und dem Saugdurchmesser Dz ungefähr 2,4 beträgt.
  5. Zentrifugalpumpe nach einem der voranstehenden Ansprüche, wobei der trichterförmige Auslass (5) des Pumpengehäuses (2) einen schmalsten Durchgang mit einem Halsdurchmesser Dk hat, und wobei das Verhältnis zwischen dem Halsdurchmesser Dk des trichterförmigen Auslasses (5) und dem Saugdurchmesser Dz zwischen 0,5 und 0,7 beträgt.
  6. Zentrifugalpumpe nach Anspruch 5, wobei das Verhältnis zwischen dem Halsdurchmesser Dk des trichterförmigen Auslasses (5) und dem Saugdurchmesser Dz ungefähr 0,68 beträgt.
  7. Zentrifugalpumpe nach einem der voranstehenden Ansprüche, wobei der trichterförmige Auslass (5) an seinem kopfseitigen Ende einen Druckdurchmesser Dp definiert, und wobei das Verhältnis zwischen dem Druckdurchmesser Dp und dem Saugdurchmesser Dz größer als 0,7 ist.
  8. Zentrifugalpumpe nach Anspruch 7, wobei das Verhältnis zwischen dem Druckdurchmesser Dp und dem Saugdurchmesser Dz größer als 0,75 ist.
  9. Verwendung einer Zentrifugalpumpe (1) nach einem der voranstehenden Ansprüche.
EP06120843A 2006-09-18 2006-09-18 Zentrifugalpumpe und deren Anwendung Active EP1903216B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP06120843A EP1903216B1 (de) 2006-09-18 2006-09-18 Zentrifugalpumpe und deren Anwendung
AT06120843T ATE447110T1 (de) 2006-09-18 2006-09-18 Zentrifugalpumpe und deren anwendung
DE602006010075T DE602006010075D1 (de) 2006-09-18 2006-09-18 Zentrifugalpumpe und deren Anwendung
CN2007101821975A CN101201055B (zh) 2006-09-18 2007-09-18 离心泵及其应用

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06120843A EP1903216B1 (de) 2006-09-18 2006-09-18 Zentrifugalpumpe und deren Anwendung

Publications (2)

Publication Number Publication Date
EP1903216A1 EP1903216A1 (de) 2008-03-26
EP1903216B1 true EP1903216B1 (de) 2009-10-28

Family

ID=37762587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06120843A Active EP1903216B1 (de) 2006-09-18 2006-09-18 Zentrifugalpumpe und deren Anwendung

Country Status (4)

Country Link
EP (1) EP1903216B1 (de)
CN (1) CN101201055B (de)
AT (1) ATE447110T1 (de)
DE (1) DE602006010075D1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2005810C2 (en) 2010-12-03 2012-06-05 Ihc Syst Bv Centrifugal pump and a double bent rotor blade for use in such a centrifugal pump.
BR112013026499B1 (pt) * 2011-04-14 2020-12-08 Flsmidth A/S bomba centrífuga para uma pasta fluida de baixo desgaste
DE102011007907B3 (de) * 2011-04-21 2012-06-21 Ksb Aktiengesellschaft Laufrad für Kreiselpumpen
SE536929C2 (sv) * 2011-05-09 2014-11-04 Luossavaara Kiirunavaara Ab Rotormaskin avsedd att arbeta som pump eller omrörare samt en impeller för en sådan rotormaskin
NL2008180C2 (en) 2012-01-25 2013-07-29 Ihc Holland Ie Bv Pump and a method of manufacturing such a pump.
CA2871451C (en) 2012-04-27 2019-09-24 Weir Minerals Australia, Ltd. Centrifugal pump casing with offset discharge
US9599120B2 (en) * 2012-08-24 2017-03-21 Asmo Co., Ltd. Impeller for centrifugal pump and centrifugal pump of vehicle washer device
CN103334951B (zh) * 2013-03-11 2015-07-22 梁遗祥 一种推力泵
CN103742444B (zh) * 2013-12-31 2017-11-17 江苏大学 一种多相混输泵叶轮的多工况设计方法
JP6758923B2 (ja) * 2016-06-01 2020-09-23 株式会社クボタ 羽根車
CN111102246B (zh) * 2020-01-07 2022-02-08 宁波方太厨具有限公司 一种离心风机的蜗壳型线生成方法
KR20210110931A (ko) 2020-03-02 2021-09-10 엘지전자 주식회사 유체 순환용 벌루트 펌프

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
SE362689B (de) * 1972-02-21 1973-12-17 Joenkoepings Mek Werkstads
ATE220177T1 (de) * 1992-12-29 2002-07-15 Vortex Australia Pty Ltd Pumpenlaufrad und kreiselpumpe für zähflussige medien mit diesem laufrad
DE10305726A1 (de) * 2002-03-14 2003-10-02 Ksb Ag Kreiselpumpe mit Zerkleinerungseinrichtung
US7080797B2 (en) 2003-06-27 2006-07-25 Envirotech Pumpsystems, Inc. Pump impeller and chopper plate for a centrifugal pump

Also Published As

Publication number Publication date
ATE447110T1 (de) 2009-11-15
DE602006010075D1 (de) 2009-12-10
EP1903216A1 (de) 2008-03-26
CN101201055A (zh) 2008-06-18
CN101201055B (zh) 2012-06-13

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