EP0267445A2 - Mehrstufige Pumpe für elektrische Tauchpumpen - Google Patents
Mehrstufige Pumpe für elektrische Tauchpumpen Download PDFInfo
- 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- Withdrawn
Links
- 238000004873 anchoring Methods 0.000 claims abstract description 11
- 238000003466 welding Methods 0.000 claims description 4
- 241000239290 Araneae Species 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 229910052729 chemical element Inorganic materials 0.000 claims 2
- 238000004080 punching Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 2
- 238000007667 floating Methods 0.000 description 4
- 239000000306 component Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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)
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 (de) | 1988-05-18 |
EP0267445A3 EP0267445A3 (de) | 1990-02-07 |
Family
ID=11194340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87114884A Withdrawn EP0267445A3 (de) | 1986-11-11 | 1987-10-13 | Mehrstufige Pumpe für elektrische Tauchpumpen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0267445A3 (de) |
IT (1) | IT1213377B (de) |
Cited By (12)
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 (de) * | 1992-02-07 | 1993-08-11 | F.EL.SOM. S.r.l. | Mehrstufige Kreiselpumpe |
EP0566087A1 (de) * | 1992-04-14 | 1993-10-20 | Ebara Corporation | Pumpengehäuse in Blechbauweise |
US5271725A (en) * | 1990-10-18 | 1993-12-21 | Oryx Energy Company | System for pumping fluids from horizontal wells |
EP1729013A1 (de) * | 2005-05-31 | 2006-12-06 | Pedrollo S.p.a. | Zentrifugaltauchpumpe |
WO2007140549A1 (en) * | 2006-06-06 | 2007-12-13 | Akif Namazali Oglu Mirzaliyev | The well rotary electric pump |
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 (de) * | 2016-05-03 | 2017-11-08 | Robert Bosch GmbH | Befestigung eines pumpendeckels durch in einer gehäusewand ausgebildete einbuchtungen, die eine schulter des deckels hintergreifen |
WO2018114660A1 (de) * | 2016-12-20 | 2018-06-28 | KSB SE & Co. KGaA | Pumpenanordnung und nuklearreaktor mit einer solchen pumpenanordnung |
US10995748B2 (en) | 2017-09-18 | 2021-05-04 | Jeremy Leonard | Autonomous submersible pump |
Citations (4)
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 |
-
1986
- 1986-11-11 IT IT8622297A patent/IT1213377B/it active
-
1987
- 1987-10-13 EP EP87114884A patent/EP0267445A3/de not_active Withdrawn
Patent Citations (4)
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)
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)
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 (de) * | 1992-02-07 | 1993-08-11 | F.EL.SOM. S.r.l. | Mehrstufige Kreiselpumpe |
EP0566087A1 (de) * | 1992-04-14 | 1993-10-20 | Ebara Corporation | Pumpengehäuse in Blechbauweise |
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 (de) * | 2005-05-31 | 2006-12-06 | Pedrollo S.p.a. | Zentrifugaltauchpumpe |
WO2007140549A1 (en) * | 2006-06-06 | 2007-12-13 | Akif Namazali Oglu Mirzaliyev | The well rotary electric pump |
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 (de) * | 2016-05-03 | 2017-11-08 | Robert Bosch GmbH | Befestigung eines pumpendeckels durch in einer gehäusewand ausgebildete einbuchtungen, die eine schulter des deckels hintergreifen |
WO2018114660A1 (de) * | 2016-12-20 | 2018-06-28 | KSB SE & Co. KGaA | Pumpenanordnung und nuklearreaktor mit einer solchen pumpenanordnung |
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 (de) | 1990-02-07 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: GRUPPO INDUSTRIALE ERCOLE MARELLI S.P.A. |
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Free format text: ORIGINAL CODE: 0009013 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19900808 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ASSI, LUIGI Inventor name: MAPELLI, LUCIO |