US3904306A - Two-way impeller in a centrifugal pump having vertical drive shaft - Google Patents

Two-way impeller in a centrifugal pump having vertical drive shaft Download PDF

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Publication number
US3904306A
US3904306A US439766A US43976674A US3904306A US 3904306 A US3904306 A US 3904306A US 439766 A US439766 A US 439766A US 43976674 A US43976674 A US 43976674A US 3904306 A US3904306 A US 3904306A
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US
United States
Prior art keywords
impeller
end members
channels
drive shaft
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.)
Expired - Lifetime
Application number
US439766A
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English (en)
Inventor
Olav Rasmusson Navelsaker
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.)
Thune Eureka AS
Original Assignee
Thune Eureka AS
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 Thune Eureka AS filed Critical Thune Eureka AS
Application granted granted Critical
Publication of US3904306A publication Critical patent/US3904306A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2211—More than one set of flow passages
    • 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
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2277—Rotors specially for centrifugal pumps with special measures for increasing NPSH or dealing with liquids near boiling-point
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/007—Preventing loss of prime, siphon breakers
    • F04D9/008—Preventing loss of prime, siphon breakers by means in the suction mouth, e.g. foot valves

Definitions

  • ABSTRACT In a two-way impeller in a centrifugal pump having a vertical drive shaft the impeller channels are formed such that a circulation flow is provided outwardly in the lower part thereof and inwardly in the upper part. By openings in the impeller between the two impeller inlets a suction effect is induced in a direction toward the upper inlet of the impeller. On the pump drive shaft and below the two-way impeller a centripetalinducer may be mounted.
  • the invention relates to a two-way impeller in a centrifugal pump having a vertical drive shaft, and the invention is developed in particular with relation to socalled submergible centrifugal pumps, utilized for the pumping of cargo in the tanks of ships.
  • the invention relates to such a two-way impeller and the object is to provide a construction such that the lower part of the impeller also can be vented. ln accor dance with the invention, this is achieved in that the impeller channels are formed so as to provide a circulation flow outwardly in the lower part and inwardly in the upper part of the outlet, on zero distribution in the upper half part.
  • openings may be provided in the impeller between the two outlets formed so as to create a suction effect in a direction toward the upper impeller inlet in order to provide venting.
  • the lower part of the impeller channel may have a relatively larger inlet cross-section than the upper part in order to achieve the intended improvement in suction effect.
  • the edge of the blade outlet in the meridian section follows a bent line, and the bent edge of the blade outlet extends, for example, vertically at its lower part, and in the upper part of the impeller channel, inclines inwardly toward the longitudinal axis of the pump.
  • a centripetal-inducer is mounted below the two-way impeller on the same drive shaft, this centripetal-inducer delivering liquid to the downwardly facing inlet when the liquid level approaches zero.
  • the drive shaft is signified by l.
  • a two-way impeller 2 is mounted on the drive shaft in a manner known per se, and a centripetal-inducer 3 is mounted at the end of the drive shaft.
  • the two-way impeller is provided with an upper suction inlet 4 and a lower suction inlet 5 with blade channels 6 common to the two suction inlets.
  • the bearing housing of the drive shaft 1 is signified by 7 and the pump housing is indicated at 8.
  • the flow directions are indicated by arrows at the suction side and outlet of the two-way impeller, and the flow direction in the centripetal-inducer also is indicated by an arrow.
  • the curved arrow indicates a circulation flow which can be produced by several known methods.
  • the circulation flow is induced in that the lower part of the blade channel is of greater diameter than the upper part.
  • the edge of the blade outlet follows a bent line and extends vertically at 9 in the lower part and inclines inwardly at 10 toward the longitudinal axis of the pump in the upper part of the blade channel. Upon so-called zero distribution, this embodiment will induce the circulation flow indicated. This effects venting in the lower channels also.
  • openings 11 may be provided, as illustrated, formed such that an overpressure is formed on the underside thereof, a suction effect indicated by the symbols and being produced on the upper side.
  • a vertical centrifugal pump comprising a casing, an impeller, means mounting said impeller for rotation in said casing about a vertical axis, said impeller comprising upper and lower annular end members that are vertically spaced apart and spaced radially outwardly from the axis of rotation of said impeller, a partition member disposed between and spaced from said end members, blades interconnecting each of said end members with said partition member to define channels between said end members and said blades and said partition member that open radially outwardly and upwardly and downwardly, said casing having passages communicating radially outwardly with said channels between said end members and upwardly with said channels between said upper end member and said partition member, said partition member having upwardly extending openings therethrough to vent the lower of said channels to the upper of said channels, the upper of said end members being of less diameter than the lower of said end members to provide a flow path of recirculation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US439766A 1973-07-05 1974-02-05 Two-way impeller in a centrifugal pump having vertical drive shaft Expired - Lifetime US3904306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO2767/73A NO276773L (no) 1973-07-05 1973-07-05

Publications (1)

Publication Number Publication Date
US3904306A true US3904306A (en) 1975-09-09

Family

ID=19879114

Family Applications (1)

Application Number Title Priority Date Filing Date
US439766A Expired - Lifetime US3904306A (en) 1973-07-05 1974-02-05 Two-way impeller in a centrifugal pump having vertical drive shaft

Country Status (6)

Country Link
US (1) US3904306A (no)
JP (1) JPS5023009A (no)
DE (1) DE2405748A1 (no)
ES (1) ES423426A1 (no)
NO (1) NO276773L (no)
SE (1) SE7402152L (no)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5108257A (en) * 1989-05-26 1992-04-28 Pacific Machinery & Engineering Co., Ltd. Impeller for turbo pump for water jet propulsion machinery, and turbo pump including same impeller
WO1997027403A1 (en) * 1996-01-26 1997-07-31 Frank Mohn Fusa A/S Improvements in an unloading pump which is submersible in the cargo of a ship's cargo tank
US20050220620A1 (en) * 2004-03-31 2005-10-06 Walker Craig I Velocity profile impeller vane
US20060269412A1 (en) * 2005-05-27 2006-11-30 Delta Electronics, Inc. Fan and impeller thereof
US20080101921A1 (en) * 2006-10-26 2008-05-01 Schlumberger Technology Corporation Impeller for centrifugal pump
WO2008141381A1 (en) * 2007-05-21 2008-11-27 Weir Minerals Australia Ltd Improvements in and relating to pumps
US20090230599A1 (en) * 2008-03-14 2009-09-17 Thut Bruno H Molten metal flow powered degassing device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2383424A (en) * 1944-05-06 1945-08-21 Ingersoll Rand Co Pump
US2463251A (en) * 1944-10-19 1949-03-01 Curtis Pump Co Vapor expelling pump
US2465625A (en) * 1943-10-18 1949-03-29 Sulzer Ag Centrifugal compressor
US2471174A (en) * 1947-04-24 1949-05-24 Clark Bros Co Inc Centrifugal compressor stability means
US2581828A (en) * 1946-03-07 1952-01-08 Nash Engineering Co Pump
US2985108A (en) * 1957-09-16 1961-05-23 Curtiss Wright Corp Vapor purging pump
US3250440A (en) * 1963-12-23 1966-05-10 Fmc Corp Pumping apparatus
US3721504A (en) * 1971-02-18 1973-03-20 A Crisafulli Vertically adjustable centrifugal pump for use in manholes

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465625A (en) * 1943-10-18 1949-03-29 Sulzer Ag Centrifugal compressor
US2383424A (en) * 1944-05-06 1945-08-21 Ingersoll Rand Co Pump
US2463251A (en) * 1944-10-19 1949-03-01 Curtis Pump Co Vapor expelling pump
US2581828A (en) * 1946-03-07 1952-01-08 Nash Engineering Co Pump
US2471174A (en) * 1947-04-24 1949-05-24 Clark Bros Co Inc Centrifugal compressor stability means
US2985108A (en) * 1957-09-16 1961-05-23 Curtiss Wright Corp Vapor purging pump
US3250440A (en) * 1963-12-23 1966-05-10 Fmc Corp Pumping apparatus
US3721504A (en) * 1971-02-18 1973-03-20 A Crisafulli Vertically adjustable centrifugal pump for use in manholes

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5108257A (en) * 1989-05-26 1992-04-28 Pacific Machinery & Engineering Co., Ltd. Impeller for turbo pump for water jet propulsion machinery, and turbo pump including same impeller
WO1997027403A1 (en) * 1996-01-26 1997-07-31 Frank Mohn Fusa A/S Improvements in an unloading pump which is submersible in the cargo of a ship's cargo tank
CN1938189B (zh) * 2004-03-31 2010-06-16 威尔斯拉里集团公司 具有改进流速分布的叶轮叶片
US20050220620A1 (en) * 2004-03-31 2005-10-06 Walker Craig I Velocity profile impeller vane
US7179057B2 (en) * 2004-03-31 2007-02-20 Weir Slurry Group, Inc. Velocity profile impeller vane
EA008823B1 (ru) * 2004-03-31 2007-08-31 Уэйр Слэри Груп, Инк. Усовершенствованный профиль распределения скоростей лопатки рабочего колеса
WO2005097593A3 (en) * 2004-03-31 2006-01-19 Weir Slurry Group Inc Improved velocity profile impeller vane
US20060269412A1 (en) * 2005-05-27 2006-11-30 Delta Electronics, Inc. Fan and impeller thereof
US7281896B2 (en) * 2005-05-27 2007-10-16 Delta Electronics, Inc. Fan and impeller thereof
US20080101921A1 (en) * 2006-10-26 2008-05-01 Schlumberger Technology Corporation Impeller for centrifugal pump
WO2008051751A2 (en) * 2006-10-26 2008-05-02 Schlumberger Canada Limited Impeller for centrifugal pump
WO2008051751A3 (en) * 2006-10-26 2008-11-20 Schlumberger Ca Ltd Impeller for centrifugal pump
US7549837B2 (en) * 2006-10-26 2009-06-23 Schlumberger Technology Corporation Impeller for centrifugal pump
US8622706B2 (en) 2007-05-21 2014-01-07 Weir Minerals Australia Ltd. Slurry pump having impeller flow elements and a flow directing device
US20100135765A1 (en) * 2007-05-21 2010-06-03 Kevin Edward Burgess Pumps
EA015197B1 (ru) * 2007-05-21 2011-06-30 Уэйр Минералз Острэйлиа Лтд. Усовершенствования, относящиеся к насосам
WO2008141381A1 (en) * 2007-05-21 2008-11-27 Weir Minerals Australia Ltd Improvements in and relating to pumps
CN104061184A (zh) * 2007-05-21 2014-09-24 伟尔矿物澳大利亚私人有限公司 泵的改进和与泵有关的改进
CN104061184B (zh) * 2007-05-21 2017-08-04 伟尔矿物澳大利亚私人有限公司 泵的改进和与泵有关的改进
US9897090B2 (en) 2007-05-21 2018-02-20 Weir Minerals Australia Ltd. Pumps
US11274669B2 (en) 2007-05-21 2022-03-15 Weir Minerals Australia Ltd. Relating to pumps
US20090230599A1 (en) * 2008-03-14 2009-09-17 Thut Bruno H Molten metal flow powered degassing device
US7858020B2 (en) 2008-03-14 2010-12-28 Thut Bruno H Molten metal flow powered degassing device

Also Published As

Publication number Publication date
ES423426A1 (es) 1976-05-16
DE2405748A1 (de) 1975-01-30
JPS5023009A (no) 1975-03-12
NO276773L (no) 1975-02-03
SE7402152L (no) 1975-01-07

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