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JPS57186089A - Well pump - Google Patents

Well pump

Info

Publication number
JPS57186089A
JPS57186089A JP6940181A JP6940181A JPS57186089A JP S57186089 A JPS57186089 A JP S57186089A JP 6940181 A JP6940181 A JP 6940181A JP 6940181 A JP6940181 A JP 6940181A JP S57186089 A JPS57186089 A JP S57186089A
Authority
JP
Japan
Prior art keywords
water
flow
pump
reproduction
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.)
Pending
Application number
JP6940181A
Other languages
Japanese (ja)
Inventor
Soichi Fukuzawa
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 JP6940181A priority Critical patent/JPS57186089A/en
Publication of JPS57186089A publication Critical patent/JPS57186089A/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
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps

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

PURPOSE:To enable the increasing of the amount of water by providing a reproduction pump at the upstream of a centrifugal pump while conducting each suction port through a bypath then making the slope of the water-lift curve sharp under low amount of water while making gentle under high amount of water. CONSTITUTION:Under low water flow where the impeller 8 will be in the operating range of a reproduction pump, the water will flow into a centrifugal impeller 11 to produce the high pressure water where a check valve 17 will close the outlet of a bypath 16. Consequently the water lift characteristic will have the sharp inclination as shown in the range A of the drawing. When the flow will exceed over the limit flow of the reproduction pump, the water can not be supplied to the centrifugal impeller 11 thereby the pressure at the sucking section of said impeller 11 will be made lower than that at the sucking section of the reproduction pump to open the check valve 17 and the water will flow directly into the centrifugal impeller 11 to continue the pump function thus to reduce the inclination of the flow-lift characteristic resulting in the high flow.
JP6940181A 1981-05-11 1981-05-11 Well pump Pending JPS57186089A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6940181A JPS57186089A (en) 1981-05-11 1981-05-11 Well pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6940181A JPS57186089A (en) 1981-05-11 1981-05-11 Well pump

Publications (1)

Publication Number Publication Date
JPS57186089A true JPS57186089A (en) 1982-11-16

Family

ID=13401537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6940181A Pending JPS57186089A (en) 1981-05-11 1981-05-11 Well pump

Country Status (1)

Country Link
JP (1) JPS57186089A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199992A1 (en) 1985-03-28 1986-11-05 Eisai Co., Ltd. Adsorption-resistant peptide composition and use of benzalkonium or benzethonium chloride in the preparation thereof
CN106545501A (en) * 2017-01-13 2017-03-29 史买林 Axial-flow type centrifugal pump safe operation system and its method of work

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0199992A1 (en) 1985-03-28 1986-11-05 Eisai Co., Ltd. Adsorption-resistant peptide composition and use of benzalkonium or benzethonium chloride in the preparation thereof
CN106545501A (en) * 2017-01-13 2017-03-29 史买林 Axial-flow type centrifugal pump safe operation system and its method of work
CN106545501B (en) * 2017-01-13 2018-11-16 关红星 Axial-flow type centrifugal pump safe operation system and its working method

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