EP0952352A3 - Thrust-balancing device - Google Patents

Thrust-balancing device Download PDF

Info

Publication number
EP0952352A3
EP0952352A3 EP99107770A EP99107770A EP0952352A3 EP 0952352 A3 EP0952352 A3 EP 0952352A3 EP 99107770 A EP99107770 A EP 99107770A EP 99107770 A EP99107770 A EP 99107770A EP 0952352 A3 EP0952352 A3 EP 0952352A3
Authority
EP
European Patent Office
Prior art keywords
thrust balance
fluid
balance chamber
thrust
impeller
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.)
Granted
Application number
EP99107770A
Other languages
German (de)
French (fr)
Other versions
EP0952352A2 (en
EP0952352B1 (en
Inventor
Yasushi c/oNikkiso Co. Ltd. Kubota
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.)
Nikkiso Co Ltd
Original Assignee
Nikkiso Co Ltd
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 Nikkiso Co Ltd filed Critical Nikkiso Co Ltd
Publication of EP0952352A2 publication Critical patent/EP0952352A2/en
Publication of EP0952352A3 publication Critical patent/EP0952352A3/en
Application granted granted Critical
Publication of EP0952352B1 publication Critical patent/EP0952352B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • 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
    • F04D29/2266—Rotors specially for centrifugal pumps with special measures for sealing or thrust balance
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0416—Axial thrust balancing balancing pistons

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A flow channel and pressure equalizing sections introduce a fluid having substantially no angular momentum into a thrust balance chamber of a thrust balance device. The introduction of this fluid reduces the angular momentum of the fluid in the thrust balance chamber, facilitating the discharge of fluid out of the thrust balance chamber through a variable orifice. The thrust balance chamber exerts a variable pressure onto a rear surface of an impeller of a centrifugal pump. This pressure prevents significant displacement of the impeller during pump operation. The result is a centrifugal pump having good thrust balance properties regardless of flow rate and impeller speed.
EP99107770A 1998-04-20 1999-04-19 Thrust-balancing device Expired - Lifetime EP0952352B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10972098 1998-04-20
JP10972098 1998-04-20

Publications (3)

Publication Number Publication Date
EP0952352A2 EP0952352A2 (en) 1999-10-27
EP0952352A3 true EP0952352A3 (en) 2001-05-30
EP0952352B1 EP0952352B1 (en) 2004-12-22

Family

ID=14517524

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99107770A Expired - Lifetime EP0952352B1 (en) 1998-04-20 1999-04-19 Thrust-balancing device

Country Status (5)

Country Link
EP (1) EP0952352B1 (en)
KR (1) KR100295011B1 (en)
CN (1) CN1120937C (en)
DE (1) DE69922729T2 (en)
TW (1) TW406166B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4281614B2 (en) * 2004-05-10 2009-06-17 株式会社日立プラントテクノロジー Pump device
CN100368689C (en) * 2004-09-16 2008-02-13 北京化工大学 Differential thrust balance device for rotary fluid machinery
CN101113741B (en) * 2006-07-26 2011-03-16 上海新沪电机厂有限公司 Automatic balance device for shielding force at direction of pump spindle
US8529191B2 (en) * 2009-02-06 2013-09-10 Fluid Equipment Development Company, Llc Method and apparatus for lubricating a thrust bearing for a rotating machine using pumpage
KR101509814B1 (en) * 2009-12-02 2015-04-06 현대자동차주식회사 Cooling water pump having improved impeller struture
DE102009060549A1 (en) * 2009-12-23 2011-06-30 Wilo Se, 44263 EC motor centrifugal pump
KR101700332B1 (en) 2015-07-29 2017-02-14 한국해양대학교 산학협력단 Apparatus for Decreasing Thrust of Radial Inflow Turbine
ITUA20163303A1 (en) * 2016-05-10 2017-11-10 Ind Saleri Italo Spa PUMP UNIT WITH ELECTRIC DRIVE AND MECHANICAL DRIVE WITH SUPPORTED IMPELLER
US11085457B2 (en) 2017-05-23 2021-08-10 Fluid Equipment Development Company, Llc Thrust bearing system and method for operating the same
US10801512B2 (en) 2017-05-23 2020-10-13 Vector Technologies Llc Thrust bearing system and method for operating the same
CN109281861A (en) * 2018-11-28 2019-01-29 珠海格力电器股份有限公司 Axial force automatic balancing device, water pump and air conditioner
CN114483640B (en) * 2022-01-25 2022-10-28 威乐(中国)水泵***有限公司 Impeller for centrifugal pump and compact industrial refrigeration pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2105485A1 (en) * 1970-08-06 1972-04-06 Nikkiso C Ltd Axial pressure compensation device for motor pumps
US5320482A (en) * 1992-09-21 1994-06-14 The United States Of America As Represented By The Secretary Of The Navy Method and apparatus for reducing axial thrust in centrifugal pumps
EP0688955A1 (en) * 1994-06-23 1995-12-27 KSB Aktiengesellschaft Device for the compensation of axial thrust in centrifugal pumps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2105485A1 (en) * 1970-08-06 1972-04-06 Nikkiso C Ltd Axial pressure compensation device for motor pumps
US5320482A (en) * 1992-09-21 1994-06-14 The United States Of America As Represented By The Secretary Of The Navy Method and apparatus for reducing axial thrust in centrifugal pumps
EP0688955A1 (en) * 1994-06-23 1995-12-27 KSB Aktiengesellschaft Device for the compensation of axial thrust in centrifugal pumps

Also Published As

Publication number Publication date
KR100295011B1 (en) 2001-07-12
DE69922729T2 (en) 2005-12-01
CN1232928A (en) 1999-10-27
DE69922729D1 (en) 2005-01-27
TW406166B (en) 2000-09-21
KR19990083231A (en) 1999-11-25
CN1120937C (en) 2003-09-10
EP0952352A2 (en) 1999-10-27
EP0952352B1 (en) 2004-12-22

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