EP2716914B1 - Centrifugal electric pump - Google Patents
Centrifugal electric pump Download PDFInfo
- Publication number
- EP2716914B1 EP2716914B1 EP13186586.7A EP13186586A EP2716914B1 EP 2716914 B1 EP2716914 B1 EP 2716914B1 EP 13186586 A EP13186586 A EP 13186586A EP 2716914 B1 EP2716914 B1 EP 2716914B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jackets
- head
- impellers
- pump
- motor
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 8
- 230000013011 mating Effects 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 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
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/406—Casings; Connections of working fluid 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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/063—Multi-stage pumps of the vertically split casing type
- F04D1/066—Multi-stage pumps of the vertically split casing type the casing consisting of a plurality of annuli bolted together
-
- 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
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings 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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage 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
- 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
- F04D13/0606—Canned motor pumps
- F04D13/0626—Details of the can
Definitions
- the present invention relates to a centrifugal electric pump.
- Centrifugal electric pumps which are composed substantially of a hollow body provided with intake and delivery ducts and containing a plurality of impellers interleaved by diffusers and keyed on the shaft of an electric motor.
- the motor and the pump are typically separated hermetically in order to prevent the escape of any water seepage from the impellers or of condensation from reaching the inside of the motor.
- the motor When the motor is liquid-cooled, it is advantageously skimmed externally by at least a fraction of the liquid moved by the pump.
- GB-A-2414278 discloses a pump.
- the aim of the present invention is to improve a centrifugal electric pump, in order to preserve the operation of the motor and therefore of the entire device, preventing the passage of any water infiltrations into the motor.
- an object of the invention is to provide an electric pump that is structurally simple and can be manufactured with low costs.
- the pump according to the invention is generally designated by the reference numeral 10 and is of the type comprising a shell 11 for the containment of a set of impellers 12, interleaved (as indicated in the sectional view of Figure 2 ) with fixed diffusers 13 that are integral with the shell 11, and of a motor 14 that drives the impellers 12 to rotate, since they are keyed on the shaft 15 of said motor 14.
- the centrifugal pump is of the multistage type with five impellers 12; however, the proposed solution can also be applied in the use of pumps with a different number of impellers 12.
- the pump 10 is provided with a sealing chamber 16 to collect the condensation water and water seepage originating from the set of the impellers 12. Said chamber is extended around the shaft 15, conveniently interposed between the set of impellers 12 and the motor 14, and is advantageously connected to the outside of the pump 10 by means of a water discharge duct 18.
- the reference numeral 17 designates an interspace, that is comprised between the set of impellers 12 and the shell 11, for recirculation of pressurized water.
- the duct 18, with respect to the drawing that illustrates it, is substantially vertical and the shell 11 has thereat a discharge hole 19 that is conveniently arranged in its lowest part.
- the shell 11 is composed of multiple parts. In particular, it comprises a substantially cylindrical portion, which surrounds the impellers 12, the sealing chamber 16 and the motor 14; such portion is constituted by two jackets 20a, 20b which are mated on the transverse plane at the discharge hole 19.
- the shell 11 also comprises two opposite heads 21 and 22, respectively a first head 21 at the intake region of the pump and a second head 22 at the delivery region of the pump.
- the first head 21 has at least one intake duct 23 for the flow that enters the impellers 12, two mutually perpendicular ones in the embodiment described here and shown in Figures 1 and 2 , and the second head 22 has a flow delivery duct 24.
- Both the intake ducts 23 and the delivery duct 24 are connected to the outside of the pump, since they are part of the shell 11; in particular, the intake ducts 23 merge into a single duct that conveys the flow to the first impeller of the set of impellers 12.
- the first head 21 further has an outward opening which, as shown in Figure 1 , can be closed by a plug 25.
- the two jackets 20a and 20b are substantially two cylindrical bodies which are hollow and open at their end faces, have the same shape and dimensions and are mated symmetrically on the transverse plane so as to constitute the substantially cylindrical portion of the shell 11.
- each jacket has, at its two opposite end faces, respectively a first flange 26 and a second flange 27, the latter for mating with the other one of the two jackets 20a, 20b.
- the second flange 27, as shown more clearly in Figure 1 is contoured on the edge so as to be provided laterally with one half of the discharge hole 19: in this manner, the two jackets 20a and 20b, by both mating symmetrically with the second flange 27, provide the discharge hole 19 by means of their two hole halves.
- the edge is contoured so as to define not only the hole half but also a protrusion 28 on one side with respect to it and a complementarily shaped recess 29 on the other side.
- the protrusion 28 of each jacket 20a, 20b enters the respective recess 29 of the other jacket, preventing the relative rotation of the two jackets during assembly.
- the four main components of the shell 11, i.e., the two jackets 20a, 20b and the first and second heads 21, 22, are joined by means of threaded tension members 30 that pass in succession through:
- Each one of the two jackets 20a and 20a is further provided externally with longitudinal and transverse stiffening ribs 33.
- the sealing chamber 16 prevents the water that originates from seepage and condensation from reaching the inside of the motor of the pump, and since at least one discharge duct is also present, such water is conveniently discharged outside the shell 11.
- the pump can be used advantageously by utilizing this particularity both in a horizontal configuration and in a vertical configuration.
- the duct 18 is in fact in a vertical position and the water collected from the sealing chamber 16 is easily discharged outside by gravity.
- the two jackets 20a and 20b which are identical in dimensions and shape, can be manufactured by using a single mold, consequently containing the production costs of the pump.
- the shell 11 in fact can be made of plastic material, which can be replaced optionally with other material.
- the invention achieves the intended aim and objects, by improving a centrifugal electric pump by way of which it is possible to prevent any infiltrations of water from reaching the inside of the motor, compromising the operation of the device.
- the proposed solution is structurally simple and can be provided with low production costs.
- the materials used may be any according to requirements and to the state of the art.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000284A ITPD20120284A1 (it) | 2012-10-02 | 2012-10-02 | Struttura di elettropompa centrifuga perfezionata |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2716914A1 EP2716914A1 (en) | 2014-04-09 |
EP2716914B1 true EP2716914B1 (en) | 2020-09-16 |
Family
ID=47226296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13186586.7A Active EP2716914B1 (en) | 2012-10-02 | 2013-09-30 | Centrifugal electric pump |
Country Status (7)
Country | Link |
---|---|
US (1) | US20140093409A1 (ru) |
EP (1) | EP2716914B1 (ru) |
CN (1) | CN103711708B (ru) |
ES (1) | ES2835711T3 (ru) |
IT (1) | ITPD20120284A1 (ru) |
RU (1) | RU2621851C2 (ru) |
UA (1) | UA115031C2 (ru) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2818722B1 (de) * | 2013-06-24 | 2019-01-09 | Grundfos Holding A/S | Kreiselpumpe |
EP3181908B1 (de) * | 2015-12-17 | 2020-05-13 | Grundfos Holding A/S | Mehrstufige kreiselpumpe mit aus blech gebildeten zugankern |
JP2018062919A (ja) * | 2016-10-14 | 2018-04-19 | 株式会社鷺宮製作所 | 排水ポンプ |
IT201800003061A1 (it) * | 2018-02-27 | 2019-08-27 | Dab Pumps Spa | Assemblato di elettropompa con connettore perfezionato per l'alimentazione elettrica |
EP3670919A1 (en) * | 2018-12-20 | 2020-06-24 | Grundfos Holding A/S | Pump assembly |
RU190939U1 (ru) * | 2019-02-18 | 2019-07-16 | Акционерное общество (АО) "Турбонасос" | Многоступенчатый центробежный насос |
TWI696763B (zh) | 2019-04-11 | 2020-06-21 | 大井泵浦工業股份有限公司 | 直立式泵浦結構 |
CN111828329B (zh) * | 2019-04-15 | 2021-12-07 | 大井泵浦工业股份有限公司 | 直立式泵结构 |
CN111188794B (zh) * | 2020-01-10 | 2021-03-16 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队 | 一种用于疏干井封井潜水泵保护装置 |
IT202000004882A1 (it) * | 2020-03-09 | 2021-09-09 | Dab Pumps Spa | Elettropompa con camicia perfezionata |
IT202000004879A1 (it) * | 2020-03-09 | 2021-09-09 | Dab Pumps Spa | Elettropompa verticale a manutenzione facilitata |
IT202000004873A1 (it) * | 2020-03-09 | 2021-09-09 | Dab Pumps Spa | Supporto perfezionato per cuscinetto per elettropompa ed elettropompa con un simile supporto |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1428238A (en) * | 1921-04-04 | 1922-09-05 | John B Keating | Submersible pump and the like |
US1823455A (en) * | 1928-12-20 | 1931-09-15 | Ingersoll Rand Co | Centrifugal pump |
US2005429A (en) * | 1932-03-21 | 1935-06-18 | Foster Wheeler Corp | Centrifugal pump and the like |
US2393691A (en) * | 1943-11-03 | 1946-01-29 | Worthington Pump & Mach Corp | Pumping unit |
US3370542A (en) * | 1965-10-21 | 1968-02-27 | Dresser Ind | Temperature detection device |
US3698830A (en) * | 1971-02-02 | 1972-10-17 | Goyne Pump Co | Vertical centrifugal suction pump |
US4563124A (en) * | 1984-02-24 | 1986-01-07 | Figgie International Inc. | Double suction, single stage volute pump |
EP0215927A1 (en) * | 1985-03-22 | 1987-04-01 | McLAREN, Keith, Stuart | Heat exchanger |
DE3818651A1 (de) * | 1988-06-01 | 1989-12-07 | Klein Schanzlin & Becker Ag | Gehaeuse in inline-bauart |
US5888053A (en) * | 1995-02-10 | 1999-03-30 | Ebara Corporation | Pump having first and second outer casing members |
JP2000045981A (ja) * | 1998-07-29 | 2000-02-15 | Teral Kyokuto Inc | 陸上ポンプ |
CN2434451Y (zh) * | 2000-07-18 | 2001-06-13 | 上海凯泉泵业(集团)有限公司 | 便于维修的立式多级离心泵 |
US7122144B2 (en) * | 2003-10-21 | 2006-10-17 | Shih-Sheng Yang | Method of making a water conduit connector for sports water bag |
GB0411040D0 (en) * | 2004-05-18 | 2004-06-23 | Weir Pumps Ltd | Pump assembly |
JP2005330901A (ja) * | 2004-05-20 | 2005-12-02 | Daikin Ind Ltd | 冷凍装置のポンプ |
US7290984B2 (en) * | 2005-05-26 | 2007-11-06 | Franklin Electric Co., Ltd. | Multistage pump |
US20080286136A1 (en) * | 2007-05-17 | 2008-11-20 | Purvines Stephen H | Fan housing |
IT1396130B1 (it) * | 2009-10-08 | 2012-11-16 | Pedrollo Spa | Elettropompa centrifuga sommersa |
US9394909B2 (en) * | 2012-08-01 | 2016-07-19 | Schlumberger Technology Corporation | Submersible pump housing with seal bleed ports |
-
2012
- 2012-10-02 IT IT000284A patent/ITPD20120284A1/it unknown
-
2013
- 2013-09-29 CN CN201310454939.0A patent/CN103711708B/zh active Active
- 2013-09-30 EP EP13186586.7A patent/EP2716914B1/en active Active
- 2013-09-30 ES ES13186586T patent/ES2835711T3/es active Active
- 2013-10-01 RU RU2013144190A patent/RU2621851C2/ru active
- 2013-10-02 UA UAA201311629A patent/UA115031C2/uk unknown
- 2013-10-02 US US14/044,776 patent/US20140093409A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
US20140093409A1 (en) | 2014-04-03 |
RU2013144190A (ru) | 2015-04-10 |
ITPD20120284A1 (it) | 2014-04-03 |
EP2716914A1 (en) | 2014-04-09 |
CN103711708A (zh) | 2014-04-09 |
UA115031C2 (uk) | 2017-09-11 |
CN103711708B (zh) | 2017-08-18 |
RU2621851C2 (ru) | 2017-06-07 |
ES2835711T3 (es) | 2021-06-23 |
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