EP0267445A2 - Pompe multiétagée pour pompes électriques submersibles - Google Patents

Pompe multiétagée pour pompes électriques submersibles Download PDF

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Publication number
EP0267445A2
EP0267445A2 EP87114884A EP87114884A EP0267445A2 EP 0267445 A2 EP0267445 A2 EP 0267445A2 EP 87114884 A EP87114884 A EP 87114884A EP 87114884 A EP87114884 A EP 87114884A EP 0267445 A2 EP0267445 A2 EP 0267445A2
Authority
EP
European Patent Office
Prior art keywords
multistage pump
diffuser
centering
pump according
outer casing
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Withdrawn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
EP87114884A
Other languages
German (de)
English (en)
Other versions
EP0267445A3 (fr
Inventor
Lucio Mapelli
Luigi Assi
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.)
Gruppo Industriale Ercole Marelli SpA
Original Assignee
Gruppo Industriale Ercole Marelli SpA
Marelli Componelli Elettromeccanici 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 Gruppo Industriale Ercole Marelli SpA, Marelli Componelli Elettromeccanici SpA filed Critical Gruppo Industriale Ercole Marelli SpA
Publication of EP0267445A2 publication Critical patent/EP0267445A2/fr
Publication of EP0267445A3 publication Critical patent/EP0267445A3/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Withdrawn legal-status Critical Current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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid 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
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking

Definitions

  • This invention relates to a multistage pump for submersible electric pumps, and more in particular to a multistage pump for submersible electric pumps with an improved system for the anchoring, centering and as­sembly of the stage bodies and of the related com­ponents.
  • the aim of the present invention is therefore to eliminate the above described disadvantages and provide an improved system for the anchoring, centering and assembly of the stage bodies and of the related compo­nents, so as to allow, in particular, to reduce the machining and assembly and disassembly costs, and at the same time so as to increase the solidity, the centering and the hydraulic tightness of the structure of the pump.
  • a multistage pump for submersible electric pumps with an external tubular casing containing a plurality of stage bodies axially stacked atop one another within the outer casing, each stage body comprising an impeller, a diffuser, and a diffuser cover, characterized in that the assembly consisting of a plurality of stacked stage bodies is interposed between a pressure chamber, arranged on the delivery side, and a locking plate and a suction chamber, both arranged on the suction side, in that the outer casing is provided with a plurality of axial elements for axial anchoring and centering consisting of abutment and centering elements or projections, protruding radially towards the interior thereof and circumferentially spaced with respect to one another along at least two circumferences spaced axially along the outer casing and engaging in corresponding periph­eral notches provided respectively in the pressure chamber and in the locking plate and in that the suction chamber is connected to the locking plate by means of fixing bolts, and is provided with pressure fingers which
  • At least one further group of abutment and centering elements, or projections, iden­tical to the ones previously described, is furthermore provided in the outer casing, and is arranged on at least one circumference which is axially intermediate and acts only radially, with a centering function.
  • This system for anchoring, centering and assembly allows to achieve a structure which is simpler and more solid and easier to assemble than the prior art, and in particular it allows to reduce the inner locking elements of the stage body assembly to only three (suction chamber, locking plate, pressure chamber) with respect to the six generally required according to the prior art (pressure chamber, shaft guide, two locking plates respectively for suction and for delivery, and suction chamber or motor coupling spider).
  • each stage body is provided as a sealed unit. This facilitates assembly and achieves greater solidity and greater safety in sealing against infiltrations and leakages of water.
  • the pump for submersible electric pumps therein consists of: an outer tubular casing 1; a plurality of stage bodies 2 axially stacked one atop the other, each comprising an impeller 3, a diffuser 4 and a diffuser cover 5; a pressure chamber 6 on the delivery side; a locking plate 7 and a suction chamber 8 on the suction side.
  • a shaft with hexagonal cross section is inserted in the hub of the impellers 3 and by means of the joint 10 it is coupled to the shaft of the electric motor (not shown).
  • an axial recess 15 is provided to allow the passage of the motor power supply cable (not shown).
  • a one-way valve with a shutter 11 is contained in the pressure chamber.
  • the other structural elements of the pump which are not significant with regard to the present invention are not considered in this specification.
  • the outer casing 1 is provided, on the delivery side, with axial anchoring projections 12a which engage in corresponding notches provided in peripheral ridges of the pressure chamber 6, with centering projections 12b engaged radially against the axially internal end of said pressure chamber, and with axial anchoring projections 12c on the suction side, engaged in corresponding notches of the locking plate 7.
  • the fixing bolts 13 connect the suction chamber 8 to the locking plate 7. By tightening the bolts 13, the pres­sure fingers 14 of the suction chamber 8 which pass through corresponding openings of the locking plate 7 allow the compression of the assembly of the stage bodies 2 against the pressure chamber 6 axially anchored by the projections 12a, reacting on the locking plate 7 which is in turn anchored by the projections 12c.
  • said chamber also acts as a connecting spider for the motor (not shown).
  • the anchoring by means of projections according to the present invention features,has among the other previously mentioned advantages, that of allowing to obtain the outer casing from pipes commonly available on the market, having relatively ample tolerances, without requiring subsequent grinding, since the centering is made by the projections.
  • the stage bodies 2 are preferably made of molded plastic material, loaded with glass fibers.
  • the joint 20 (figure 7) between the dif­fuser 4 and the diffuser cover 5 is preferably sealed by electric welding or ultrasonic welding.
  • the cover 5 of the diffuser is furthermore composed of two sub­stantially annular parts 21 and 22 which are welded to one another, a ring 24 provided in its outer edge with an extension or axial ring 25 matingly coupled above the mouth of the impeller 3 (figures 7 and 8) being provided freely floating in an interspace 23 of said parts 21 and 22.
  • This construction allows a more compact structure, an improved hydraulic seal between one impeller and the other of the stages, and an improved hydraulic and mechanical performance by virtue of the play existing between the diffuser cover 5 and the floating ring 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP87114884A 1986-11-11 1987-10-13 Pompe multiétagée pour pompes électriques submersibles Withdrawn EP0267445A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8622297A IT1213377B (it) 1986-11-11 1986-11-11 Pompa a piu' stati per elettropompa sommersa.
IT2229786 1986-11-11

Publications (2)

Publication Number Publication Date
EP0267445A2 true EP0267445A2 (fr) 1988-05-18
EP0267445A3 EP0267445A3 (fr) 1990-02-07

Family

ID=11194340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87114884A Withdrawn EP0267445A3 (fr) 1986-11-11 1987-10-13 Pompe multiétagée pour pompes électriques submersibles

Country Status (2)

Country Link
EP (1) EP0267445A3 (fr)
IT (1) IT1213377B (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2250544A (en) * 1990-10-18 1992-06-10 Oryx Energy Co System for pumping fluids from horizontal wells
EP0554803A1 (fr) * 1992-02-07 1993-08-11 F.EL.SOM. S.r.l. Pompe centrifuge multiétages
EP0566087A1 (fr) * 1992-04-14 1993-10-20 Ebara Corporation Carter de pompe en tôle
US5271725A (en) * 1990-10-18 1993-12-21 Oryx Energy Company System for pumping fluids from horizontal wells
EP1729013A1 (fr) * 2005-05-31 2006-12-06 Pedrollo S.p.a. Pompe centrifuge submersible
WO2007140549A1 (fr) * 2006-06-06 2007-12-13 Akif Namazali Oglu Mirzaliyev Pompe électrique rotative pour puits
CN100366914C (zh) * 2002-05-15 2008-02-06 沃迪克有限责任公司 多级泵
CN102678627A (zh) * 2012-05-09 2012-09-19 刘思花 用于深井潜水电泵上的出水段及加工方法
CN102937099A (zh) * 2012-11-29 2013-02-20 台州锦霸工贸有限公司 一种深井潜水泵
EP3242031A1 (fr) * 2016-05-03 2017-11-08 Robert Bosch GmbH Fixation d'un couvercle de pompe par des encoches formées dans une paroi de carter, lesdites encoches engageant un épaulement du couvercle
WO2018114660A1 (fr) * 2016-12-20 2018-06-28 KSB SE & Co. KGaA Ensemble pompe et réacteur nucléaire équipé d'un tel ensemble pompe
US10995748B2 (en) 2017-09-18 2021-05-04 Jeremy Leonard Autonomous submersible pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB211848A (en) * 1923-02-24 1924-05-29 Sulzer Ag Improvements in or relating to multistage axial flow pumps
US2667128A (en) * 1950-12-13 1954-01-26 Dayton Pump & Mfg Company Submersible pump
US4293288A (en) * 1979-02-05 1981-10-06 Weber Industries, Inc. Submersible pump housing
JPS5870091A (ja) * 1981-10-23 1983-04-26 Shindo Pump Kk 細型水中ポンプのケ−シング締付装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB211848A (en) * 1923-02-24 1924-05-29 Sulzer Ag Improvements in or relating to multistage axial flow pumps
US2667128A (en) * 1950-12-13 1954-01-26 Dayton Pump & Mfg Company Submersible pump
US4293288A (en) * 1979-02-05 1981-10-06 Weber Industries, Inc. Submersible pump housing
JPS5870091A (ja) * 1981-10-23 1983-04-26 Shindo Pump Kk 細型水中ポンプのケ−シング締付装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 163 (M-229)[1308], 16th July 1983; & JP-A-58 070 091 (SHINDOU PONPU K.K.) 26-04-1983 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5154588A (en) * 1990-10-18 1992-10-13 Oryz Energy Company System for pumping fluids from horizontal wells
US5271725A (en) * 1990-10-18 1993-12-21 Oryx Energy Company System for pumping fluids from horizontal wells
GB2250544A (en) * 1990-10-18 1992-06-10 Oryx Energy Co System for pumping fluids from horizontal wells
EP0554803A1 (fr) * 1992-02-07 1993-08-11 F.EL.SOM. S.r.l. Pompe centrifuge multiétages
EP0566087A1 (fr) * 1992-04-14 1993-10-20 Ebara Corporation Carter de pompe en tôle
US5401146A (en) * 1992-04-14 1995-03-28 Ebara Corporation Pump casing made of sheet metal
CN100366914C (zh) * 2002-05-15 2008-02-06 沃迪克有限责任公司 多级泵
EP1729013A1 (fr) * 2005-05-31 2006-12-06 Pedrollo S.p.a. Pompe centrifuge submersible
WO2007140549A1 (fr) * 2006-06-06 2007-12-13 Akif Namazali Oglu Mirzaliyev Pompe électrique rotative pour puits
CN102678627A (zh) * 2012-05-09 2012-09-19 刘思花 用于深井潜水电泵上的出水段及加工方法
CN102937099A (zh) * 2012-11-29 2013-02-20 台州锦霸工贸有限公司 一种深井潜水泵
EP3242031A1 (fr) * 2016-05-03 2017-11-08 Robert Bosch GmbH Fixation d'un couvercle de pompe par des encoches formées dans une paroi de carter, lesdites encoches engageant un épaulement du couvercle
WO2018114660A1 (fr) * 2016-12-20 2018-06-28 KSB SE & Co. KGaA Ensemble pompe et réacteur nucléaire équipé d'un tel ensemble pompe
US10995748B2 (en) 2017-09-18 2021-05-04 Jeremy Leonard Autonomous submersible pump

Also Published As

Publication number Publication date
IT1213377B (it) 1989-12-20
IT8622297A0 (it) 1986-11-11
EP0267445A3 (fr) 1990-02-07

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Inventor name: MAPELLI, LUCIO