JPS57153999A - Casing of centrifugal pump - Google Patents

Casing of centrifugal pump

Info

Publication number
JPS57153999A
JPS57153999A JP3940281A JP3940281A JPS57153999A JP S57153999 A JPS57153999 A JP S57153999A JP 3940281 A JP3940281 A JP 3940281A JP 3940281 A JP3940281 A JP 3940281A JP S57153999 A JPS57153999 A JP S57153999A
Authority
JP
Japan
Prior art keywords
casing
spacing
pump
swirl
shroud
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.)
Pending
Application number
JP3940281A
Other languages
Japanese (ja)
Inventor
Tatsuya Ishigaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3940281A priority Critical patent/JPS57153999A/en
Publication of JPS57153999A publication Critical patent/JPS57153999A/en
Pending 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps

Landscapes

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

Abstract

PURPOSE:To convert a frictional loss of a disc into an effective work done, by forming a projecting wall which communicates a tank area and an internal peripheral area of a casing and making a spacing between the projecting wall and an impeller shroud as small as possible. CONSTITUTION:Projecting walls 9a, 9b which communicate a tank area 8 and an internal peripheral area are formed on an internal face which is opposed via an impeller shroud 2a, 2b and a spacing 7a, 7b of a pump casing 1, showing a gradually tapered form from the start of swirl toward the end of the swirl of a volute casing 3. Liquid which flows from the start of the swirl of the volute casing 3 into the spacing 7a, 7b between the impeller shroud 2a, 2b and the casing 1 during operation of a pump is subjected to a word performed by friction with an external face of the shroud 2a, 2b. Thereafter, while flowing along the tapered spacing 7a, 7b, the liquid is collected to rise in pressure and flows from an end of the spacing 7a, 7b into a discharge flow of the impeller 2 for increasing a discharge pressure of the pump.
JP3940281A 1981-03-20 1981-03-20 Casing of centrifugal pump Pending JPS57153999A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3940281A JPS57153999A (en) 1981-03-20 1981-03-20 Casing of centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3940281A JPS57153999A (en) 1981-03-20 1981-03-20 Casing of centrifugal pump

Publications (1)

Publication Number Publication Date
JPS57153999A true JPS57153999A (en) 1982-09-22

Family

ID=12551991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3940281A Pending JPS57153999A (en) 1981-03-20 1981-03-20 Casing of centrifugal pump

Country Status (1)

Country Link
JP (1) JPS57153999A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995008714A1 (en) * 1993-09-25 1995-03-30 Ksb Aktiengesellschaft Turbo-machine with reduced attrition
US7766605B2 (en) 2003-10-20 2010-08-03 Itt Manufacturing Enterprises Inc. Centrifugal pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995008714A1 (en) * 1993-09-25 1995-03-30 Ksb Aktiengesellschaft Turbo-machine with reduced attrition
US5984629A (en) * 1993-09-25 1999-11-16 Ksb Aktiengesellscaft Turbo-machine with reduced abrasive wear
US7766605B2 (en) 2003-10-20 2010-08-03 Itt Manufacturing Enterprises Inc. Centrifugal pump

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