JPS57191498A - Centrifugal pump - Google Patents

Centrifugal pump

Info

Publication number
JPS57191498A
JPS57191498A JP7666181A JP7666181A JPS57191498A JP S57191498 A JPS57191498 A JP S57191498A JP 7666181 A JP7666181 A JP 7666181A JP 7666181 A JP7666181 A JP 7666181A JP S57191498 A JPS57191498 A JP S57191498A
Authority
JP
Japan
Prior art keywords
casing
tongue
volute
smax
maximum
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
JP7666181A
Other languages
Japanese (ja)
Inventor
Yasumasa Nakawa
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 JP7666181A priority Critical patent/JPS57191498A/en
Publication of JPS57191498A publication Critical patent/JPS57191498A/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
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
    • F04D29/468—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades

Landscapes

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

Abstract

PURPOSE:To raise the pump efficiency, by changing the maximum sectional area at the end of the volute of a volute casing of a centrifugal pump by shifting a tongue of the volute casing, and thereby improving matching between an impeller and the casing. CONSTITUTION:A movable tongue 1 is provided in a casing 2 in the manner that it can be slid in a direction x by turning a nut 3. When the top of the tongue 1 is located at a position a shown in the drawing, the maximum area Smax at the end of the volute of the casing 2 is maximum. On the other hand, when the top of the tongue 1 is located at a position b shown in the drawing, the maximum area Smax becomes minimum. Thus, according to the present invention, the value of Smax can be changed freely. Therefore, the pump efficiency can be raised by improving matching between the casing 2 and an impeller 4 by selecting the value of Smax such that the pump can be operated in optimal conditions.
JP7666181A 1981-05-22 1981-05-22 Centrifugal pump Pending JPS57191498A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7666181A JPS57191498A (en) 1981-05-22 1981-05-22 Centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7666181A JPS57191498A (en) 1981-05-22 1981-05-22 Centrifugal pump

Publications (1)

Publication Number Publication Date
JPS57191498A true JPS57191498A (en) 1982-11-25

Family

ID=13611585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7666181A Pending JPS57191498A (en) 1981-05-22 1981-05-22 Centrifugal pump

Country Status (1)

Country Link
JP (1) JPS57191498A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBS20100021A1 (en) * 2010-02-08 2011-08-09 Ind Saleri Italo Spa COOLING PUMP WITH VALVE GROUP
DE102014013224B3 (en) * 2014-09-05 2015-07-30 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt control device
CN105987024A (en) * 2015-02-12 2016-10-05 宁波方太厨具有限公司 Centrifugal fan with volute tongue capable of being adjusted dynamically

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBS20100021A1 (en) * 2010-02-08 2011-08-09 Ind Saleri Italo Spa COOLING PUMP WITH VALVE GROUP
WO2011095907A1 (en) * 2010-02-08 2011-08-11 Industrie Saleri Italo S.P.A. Cooling pump with a valve group
EP2687728A1 (en) * 2010-02-08 2014-01-22 Industrie Saleri Italo S.P.A. Cooling pump with a valve group
DE102014013224B3 (en) * 2014-09-05 2015-07-30 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt control device
WO2016034159A1 (en) 2014-09-05 2016-03-10 Nidec Gpm Gmbh Device for regulating the pump pressure of centrifugal pumps
CN105987024A (en) * 2015-02-12 2016-10-05 宁波方太厨具有限公司 Centrifugal fan with volute tongue capable of being adjusted dynamically

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