JPS5469802A - Pump system - Google Patents

Pump system

Info

Publication number
JPS5469802A
JPS5469802A JP13664977A JP13664977A JPS5469802A JP S5469802 A JPS5469802 A JP S5469802A JP 13664977 A JP13664977 A JP 13664977A JP 13664977 A JP13664977 A JP 13664977A JP S5469802 A JPS5469802 A JP S5469802A
Authority
JP
Japan
Prior art keywords
pressure
signal
flow rate
detector
discharge
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
JP13664977A
Other languages
Japanese (ja)
Inventor
Setsuo Kayake
Katsutoshi Kishigami
Kunihiko Fuji
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 JP13664977A priority Critical patent/JPS5469802A/en
Publication of JPS5469802A publication Critical patent/JPS5469802A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To control a pump at constant discharge pressure by providing a pressure detector and to adjust a pressure detector signal by providing a flow rate detector at the discharge side for prevention of excessive load to a variable speed drive means when the discharge flow rate exceed predetermined level.
CONSTITUTION: A variable speed electric motor 2 is driven to deliver constant discharge pressure when the pressure and the flow rate in a discharge pipe 4 corresponding to the discharge side load are within predetermined level wherein a saturation amplifier 10 compares the detected signal of a pressure detector 5 with the signal of a pressure setter 6 and sends a speed increase instruction to the variable speed electric motor 2 when the detected pressure is lower than the set pressure and sends a speed decrease instruction when the detected pressure is higher than the set pressure. An output signal of the saturation amplifier 10 which is adjusted by a signal of a flow rate detector 9 but is predominant to the flow rate detection signal is applied to an amplifier 11. The saturation amplifier 10 saturates and the flow detection signal increases when the load of the pump 1 increases.
COPYRIGHT: (C)1979,JPO&Japio
JP13664977A 1977-11-16 1977-11-16 Pump system Pending JPS5469802A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13664977A JPS5469802A (en) 1977-11-16 1977-11-16 Pump system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13664977A JPS5469802A (en) 1977-11-16 1977-11-16 Pump system

Publications (1)

Publication Number Publication Date
JPS5469802A true JPS5469802A (en) 1979-06-05

Family

ID=15180253

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13664977A Pending JPS5469802A (en) 1977-11-16 1977-11-16 Pump system

Country Status (1)

Country Link
JP (1) JPS5469802A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2645213A1 (en) * 1989-03-31 1990-10-05 Guinard Pompes MOTOR PUMP GROUP WITH PRESSURE AND FLOW SENSORS
US6269872B1 (en) 1998-10-14 2001-08-07 Visteon Global Technologies, Inc. System and method for regulating coolant flow rate to a heat exchanger
EP1431583A3 (en) * 2002-12-20 2005-07-27 Dab Pumps S.p.A. Device for actuating electric pumps in liquid distribution systems

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2645213A1 (en) * 1989-03-31 1990-10-05 Guinard Pompes MOTOR PUMP GROUP WITH PRESSURE AND FLOW SENSORS
US6269872B1 (en) 1998-10-14 2001-08-07 Visteon Global Technologies, Inc. System and method for regulating coolant flow rate to a heat exchanger
EP1431583A3 (en) * 2002-12-20 2005-07-27 Dab Pumps S.p.A. Device for actuating electric pumps in liquid distribution systems

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