JPS57195899A - Suction casing - Google Patents

Suction casing

Info

Publication number
JPS57195899A
JPS57195899A JP56079229A JP7922981A JPS57195899A JP S57195899 A JPS57195899 A JP S57195899A JP 56079229 A JP56079229 A JP 56079229A JP 7922981 A JP7922981 A JP 7922981A JP S57195899 A JPS57195899 A JP S57195899A
Authority
JP
Japan
Prior art keywords
suction passage
flow
impeller
suction
resistance
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
JP56079229A
Other languages
Japanese (ja)
Other versions
JPS6344960B2 (en
Inventor
Teiji Tanaka
Fumio Koseki
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 JP56079229A priority Critical patent/JPS57195899A/en
Publication of JPS57195899A publication Critical patent/JPS57195899A/en
Publication of JPS6344960B2 publication Critical patent/JPS6344960B2/ja
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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports

Landscapes

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

Abstract

PURPOSE:To give no excessive prewhirl and obtain a uniform flow in a small suction passage by protruding a part of the suction passage wall into the suction passage so as to change the resistance to the fluid. CONSTITUTION:Side walls 8a, 8b protruding to a suction passage 2 side are provided near the impeller 3 eye section of the impeller side wall face of a suction casing 1, and the side wall adjusts the suction passage width directly before the impeller 3. The height of the wall side is made maximum at the baffle 7 back nearest to a suction port, and the height is gradually decreased toward the flow direction and is made minimum at the widning end of the suction passage 2. Thereby, the wall face 8a acts as the resistance against the flow so as to interrupt the inflow in the vicinity of cross sections F, A where the suction port is nearest and the flow is easy to pass through, and the resistance is reduced to facilitate the inflow at the across sections D, E near the widning end of the suction passage 2, thus no excessive prewhirl is given and the flow directly before the impeller 1 can be kept uniform.
JP56079229A 1981-05-27 1981-05-27 Suction casing Granted JPS57195899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56079229A JPS57195899A (en) 1981-05-27 1981-05-27 Suction casing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56079229A JPS57195899A (en) 1981-05-27 1981-05-27 Suction casing

Publications (2)

Publication Number Publication Date
JPS57195899A true JPS57195899A (en) 1982-12-01
JPS6344960B2 JPS6344960B2 (en) 1988-09-07

Family

ID=13684060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56079229A Granted JPS57195899A (en) 1981-05-27 1981-05-27 Suction casing

Country Status (1)

Country Link
JP (1) JPS57195899A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6149195A (en) * 1984-08-17 1986-03-11 Kubota Ltd Double suction type spiral pump
JPH03290098A (en) * 1990-04-05 1991-12-19 Kubota Corp Prerotation type centrifugal pump
JPH03290096A (en) * 1990-04-05 1991-12-19 Kubota Corp Prerotation type centrifugal pump
JP2001046791A (en) * 1999-08-06 2001-02-20 Toshiba Corp Washer
JP2007198270A (en) * 2006-01-27 2007-08-09 Hitachi Plant Technologies Ltd Double suction centrifugal pump
US7559742B2 (en) 2004-05-06 2009-07-14 Hitachi Industries Co., Ltd. Inlet casing and suction passage structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6149195A (en) * 1984-08-17 1986-03-11 Kubota Ltd Double suction type spiral pump
JPH03290098A (en) * 1990-04-05 1991-12-19 Kubota Corp Prerotation type centrifugal pump
JPH03290096A (en) * 1990-04-05 1991-12-19 Kubota Corp Prerotation type centrifugal pump
JP2001046791A (en) * 1999-08-06 2001-02-20 Toshiba Corp Washer
US7559742B2 (en) 2004-05-06 2009-07-14 Hitachi Industries Co., Ltd. Inlet casing and suction passage structure
EP1593854A3 (en) * 2004-05-06 2010-01-13 Hitachi Industries Co., Ltd. Inlet casing and suction passage structure
JP2007198270A (en) * 2006-01-27 2007-08-09 Hitachi Plant Technologies Ltd Double suction centrifugal pump

Also Published As

Publication number Publication date
JPS6344960B2 (en) 1988-09-07

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