FR2295273A1 - Axial balance system for rotary pump - has two orifices varied in opposite senses by impeller axial movement - Google Patents

Axial balance system for rotary pump - has two orifices varied in opposite senses by impeller axial movement

Info

Publication number
FR2295273A1
FR2295273A1 FR7537799A FR7537799A FR2295273A1 FR 2295273 A1 FR2295273 A1 FR 2295273A1 FR 7537799 A FR7537799 A FR 7537799A FR 7537799 A FR7537799 A FR 7537799A FR 2295273 A1 FR2295273 A1 FR 2295273A1
Authority
FR
France
Prior art keywords
impeller
orifices
varied
rotary pump
axial
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
FR7537799A
Other languages
French (fr)
Other versions
FR2295273B3 (en
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
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 Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Publication of FR2295273A1 publication Critical patent/FR2295273A1/en
Application granted granted Critical
Publication of FR2295273B3 publication Critical patent/FR2295273B3/fr
Granted 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0416—Axial thrust balancing balancing pistons
    • 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

Landscapes

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

Abstract

The pump has a shaft (10) which carries a series of impellers (12). Each impeller is followed by a diffusor (14) and a stator blade ring (16) and is spaced from the following impeller by a distance piece (18). Liquid flows through a space (20) in front of the impeller through throttling orifices (28, 22) formed between the casing and the distance piece and impeller respectively. The liquid is throttled so that the pressure in the space, balances the axial thrust on the impeller and keeps it centered. The orifices are arranged so that as the impeller and distance piece move axially on the shaft one orifice increases in cross section while the other decreases by an equal amount so that the pressure in the balance space remains constant.
FR7537799A 1974-12-19 1975-12-10 Axial balance system for rotary pump - has two orifices varied in opposite senses by impeller axial movement Granted FR2295273A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2460095A DE2460095B2 (en) 1974-12-19 1974-12-19 Centrifugal pump with axial thrust compensation

Publications (2)

Publication Number Publication Date
FR2295273A1 true FR2295273A1 (en) 1976-07-16
FR2295273B3 FR2295273B3 (en) 1979-09-28

Family

ID=5933834

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7537799A Granted FR2295273A1 (en) 1974-12-19 1975-12-10 Axial balance system for rotary pump - has two orifices varied in opposite senses by impeller axial movement

Country Status (3)

Country Link
JP (1) JPS5186806A (en)
DE (1) DE2460095B2 (en)
FR (1) FR2295273A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355796A2 (en) * 1988-08-22 1990-02-28 Ebara Corporation Centrifugal pump having magnetic bearing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3536140A1 (en) * 1985-10-10 1987-04-16 Klein Schanzlin & Becker Ag CENTRIFUGAL PUMP UNIT
DE19631824A1 (en) * 1996-08-07 1998-02-12 Klein Schanzlin & Becker Ag Single stage centrifugal pump for fluids

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355796A2 (en) * 1988-08-22 1990-02-28 Ebara Corporation Centrifugal pump having magnetic bearing
EP0355796A3 (en) * 1988-08-22 1990-12-27 Ebara Corporation Centrifugal pump having magnetic bearing
US5127792A (en) * 1988-08-22 1992-07-07 Ebara Corporation Centrifugal pump having magnet bearing

Also Published As

Publication number Publication date
JPS5186806A (en) 1976-07-29
DE2460095A1 (en) 1976-06-24
DE2460095B2 (en) 1980-01-17
FR2295273B3 (en) 1979-09-28

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