EP1650440A1 - Carter de pompe ameliore pour pompe centrifuge et procede de production de ce carter - Google Patents

Carter de pompe ameliore pour pompe centrifuge et procede de production de ce carter Download PDF

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Publication number
EP1650440A1
EP1650440A1 EP04425788A EP04425788A EP1650440A1 EP 1650440 A1 EP1650440 A1 EP 1650440A1 EP 04425788 A EP04425788 A EP 04425788A EP 04425788 A EP04425788 A EP 04425788A EP 1650440 A1 EP1650440 A1 EP 1650440A1
Authority
EP
European Patent Office
Prior art keywords
pump casing
insert
housing element
pump
plastic
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Withdrawn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
EP04425788A
Other languages
German (de)
English (en)
Inventor
Silvano Pedrollo
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.)
Pedrollo SpA
Original Assignee
Pedrollo SpA
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 Pedrollo SpA filed Critical Pedrollo SpA
Priority to EP04425788A priority Critical patent/EP1650440A1/fr
Publication of EP1650440A1 publication Critical patent/EP1650440A1/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Withdrawn legal-status Critical Current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
    • F04D29/40—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
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials 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
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/11—Iron
    • F05D2300/111—Cast iron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/17—Alloys
    • F05D2300/171—Steel alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/17—Alloys
    • F05D2300/172—Copper alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/17—Alloys
    • F05D2300/172—Copper alloys
    • F05D2300/1721—Bronze
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the present invention relates to a method for producing the pump casing of peripheral pumps (also known as regenerative pumps) with axial suction and a pump casing produced using this method.
  • peripheral pumps also known as regenerative pumps
  • the pump casings are produced by casting with a disposable inner core.
  • the choice of this production method is dictated by the complex shape of the pump casing which has many undercut parts (for example, the pump casing has an inner suction chamber).
  • the pump casing is made of cast iron.
  • the rotor In peripheral pumps the rotor is located as close as possible to the pump casing in order to limit leaks.
  • the pump casing is made of cast iron, if the pump remains inactive for a certain period, there is the risk that the pump casing may oxidise and develop rust, until the rotor is blocked.
  • This problem may be overcome by producing the pump casing using materials which do not oxidise, such as brass, stainless steel, or a plastic (for example, a technopolymer).
  • an inner chamber has to be created, connected to the axial suction hole and to a hole, positioned eccentrically relative to the axis, for supplying liquid to the pumping chamber.
  • Said chamber in practice forms undercuts both relative to the suction hole and relative to the supply hole.
  • the technical need which forms the basis of the present invention is to provide a method for producing the pump casing of peripheral pumps with axial suction which overcomes the above-mentioned disadvantages.
  • the technical need of the present invention is to provide a method for producing the pump casing of peripheral pumps with axial suction which allows pump casings that do not seize up to be obtained with limited production costs.
  • a further technical need of the present invention is to provide a method for producing the pump casing of peripheral pumps with axial suction which allows the pump casing to be made using any material suitable for the purpose.
  • Yet another technical need of the present invention is to produce a pump casing which overcomes the above-mentioned disadvantages.
  • the numeral 1 denotes as a whole a pump casing for peripheral pumps 2 with axial suction made according to the present invention.
  • Said pump casing 1 has, in general, an outer surface 3 and an operating surface 4.
  • the pump casing 1 When the pump casing 1 is mounted on a pump 2, its outer surface 3 forms a portion of the overall outer surface of the pump.
  • the operating surface 4 is attached to and forms a pump 2 pumping chamber with the part 5 that connects the pump 2 to the relative motor.
  • the pump 2 rotor 6 rotates along a peripheral circular path where the pumping chamber 7 extends.
  • the pumping chamber is delimited by a groove 8 made in the operating surface 4 which extends along most of the circular path of the rotor 6.
  • the operating surface 4 has a flat sealing surface 9 having a first portion 10 extending in a ring shape coaxially and radially more internally than the groove 8 of the pumping chamber 7, and a second portion 11 extending radially outwards from the first portion 10 and which separates the ends 12, 13 of the groove 8.
  • the second flat portion 11 is placed opposite a similar surface on the connecting part 5 (not visible in the accompanying drawings) and is at a distance from it substantially equal to the thickness of the rotor 6 at that point, to guarantee a predetermined hydraulic seal.
  • the rotor 6 is connected, by a driving shaft 14, to the pump 2 motor 15.
  • the driving shaft 14 passes through the connecting part 5 and is supported by special sealing elements 16 (of the conventional type).
  • the pump casing 1 made according to the present invention consists of at least two parts, that is to say, a housing element 17 and an insert 18.
  • the housing element 17 constitutes the outer part of the pump casing 1 and therefore forms its outer surface 3.
  • the insert 18 is attached to the inside of the housing element 17, constitutes the inner part of the pump casing 1 and forms its operating surface 4.
  • the insert 18 can be attached to the inside of the housing element 17 in any way suitable for the purpose.
  • the insert 18 may be fixed to the housing element 17 by forcing, gluing, or any mechanical connection, or it may be simply rested on it while the pump casing is fixed to the rest of the pump.
  • a seal such as an O-ring; solution not illustrated
  • the housing element 17 is made of metal, for example cast iron, brass, bronze or stainless steel, or of plastic such as a technopolymer.
  • the insert 18 is made of metal, preferably brass or stainless steel, or of plastic such as a technopolymer.
  • a suction pipe 19 is made through the pump casing 1 and extends between the outer surface 3 and the pumping chamber 7 of the pump.
  • the suction pipe 19 comprises an inlet 20 made through the housing element 17 and axially aligned with the driving shaft 14, a suction chamber 21 made between the housing element 17 and the insert 18, and an outlet 22 consisting of a through-hole made in the insert 18 at a first end 12 of the groove 8, which forms the pumping chamber 7 on the pump casing 1 side.
  • the outlet 22 extends parallel with the axis of the driving shaft 14.
  • the pump casing 1 there is also a delivery pipe 23 extending between the pumping chamber 7 (at the other end 13 of the groove 8, relative to the suction pipe 19) and the outer surface 3 of the pump casing 1.
  • the delivery pipe 23 comprises a passage 24 made in the side of the insert 18, and an outfeed connector 25 made in the housing element 17.
  • this filling pipe 26 passes through the pump casing 1, the filling pipe extending in the same way as the delivery pipe 23 and connecting the first end 12 of the groove 8 to the outside of the pump casing 1.
  • this filling pipe 26 is closed by a removable plug (not illustrated).
  • the pump casing 1 is fitted with a flange 27 with holes made in it (with three holes, although the number may vary according to requirements) which allows it to be fixed to the connecting part 5 using through screws 28.
  • the method for producing the pump casing 1 disclosed by the present invention comprises firstly an operating step during which the outer housing element 17 is produced.
  • the housing element 17 is made of metal, preferably cast iron, brass, bronze or stainless steel, or of plastic, such as a technopolymer.
  • the housing element 17 may be produced by casting, moulding, mechanical processing, etc.
  • the insert 18 is also made of metal, preferably brass or stainless steel, or of plastic, preferably a technopolymer.
  • the insert 18 may be produced by casting, moulding, mechanical processing, etc.
  • the method involves inserting the insert 18 in the outer housing element 17 and fixing it to the latter.
  • the insert 18 may be attached to the housing element 17 in any way.
  • the insert 18 may be fixed to the housing element 17 by forcing, gluing or any mechanical connection, or it may be simply rested on it.
  • the present invention brings important advantages.
  • At least the side facing the rotor can be made of a material which does not oxidise, so that the pump casing does not seize up.
  • Pump casing production according to the present invention is also noticeably less polluting than conventional production methods, since it avoids the use of disposable inner cores, whose disposal is currently a big environmental problem.
  • a pump casing produced according to the present invention costs much less than a conventional one, and that such a pump casing may, on each occasion, be made of the material which guarantees the best quality/price ratio.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP04425788A 2004-10-20 2004-10-20 Carter de pompe ameliore pour pompe centrifuge et procede de production de ce carter Withdrawn EP1650440A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04425788A EP1650440A1 (fr) 2004-10-20 2004-10-20 Carter de pompe ameliore pour pompe centrifuge et procede de production de ce carter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425788A EP1650440A1 (fr) 2004-10-20 2004-10-20 Carter de pompe ameliore pour pompe centrifuge et procede de production de ce carter

Publications (1)

Publication Number Publication Date
EP1650440A1 true EP1650440A1 (fr) 2006-04-26

Family

ID=34932838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425788A Withdrawn EP1650440A1 (fr) 2004-10-20 2004-10-20 Carter de pompe ameliore pour pompe centrifuge et procede de production de ce carter

Country Status (1)

Country Link
EP (1) EP1650440A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2228538A1 (fr) * 2009-03-10 2010-09-15 Grundfos Management A/S Agrégat de pompe centrifuge à plusieurs niveaux
EP2990651A1 (fr) * 2014-08-25 2016-03-02 Grundfos Holding A/S Boîtier de pompe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095821A (en) * 1960-05-02 1963-07-02 Elenbaas Herman Sanitary centrifugal pump
EP1247993A2 (fr) * 2001-04-04 2002-10-09 Miele & Cie. GmbH & Co. Pompe, en particulier pompe centrifuge de circulation pour appareils ménagers utilisant de l'eau
DE20219186U1 (de) * 2001-12-11 2003-02-27 ASKOLL HOLDING S.r.l., Dueville, Vicenza Kreiselpumpe mit Entgaser
WO2003056185A1 (fr) * 2002-01-04 2003-07-10 Bogemar, S.L. Pompe centrifuge pour hydromassages

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095821A (en) * 1960-05-02 1963-07-02 Elenbaas Herman Sanitary centrifugal pump
EP1247993A2 (fr) * 2001-04-04 2002-10-09 Miele & Cie. GmbH & Co. Pompe, en particulier pompe centrifuge de circulation pour appareils ménagers utilisant de l'eau
DE20219186U1 (de) * 2001-12-11 2003-02-27 ASKOLL HOLDING S.r.l., Dueville, Vicenza Kreiselpumpe mit Entgaser
WO2003056185A1 (fr) * 2002-01-04 2003-07-10 Bogemar, S.L. Pompe centrifuge pour hydromassages

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2228538A1 (fr) * 2009-03-10 2010-09-15 Grundfos Management A/S Agrégat de pompe centrifuge à plusieurs niveaux
US8568093B2 (en) 2009-03-10 2013-10-29 Grundfos Management A/S Multi-stage centrifugal pump assembly (bearing carrier)
EP2990651A1 (fr) * 2014-08-25 2016-03-02 Grundfos Holding A/S Boîtier de pompe
CN105387000A (zh) * 2014-08-25 2016-03-09 格兰富控股联合股份公司 泵壳体
EP2990651B1 (fr) 2014-08-25 2018-07-11 Grundfos Holding A/S Boîtier de pompe
CN105387000B (zh) * 2014-08-25 2020-05-22 格兰富控股联合股份公司 泵壳体

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