JPS5596383A - Changer for number of operating pump - Google Patents

Changer for number of operating pump

Info

Publication number
JPS5596383A
JPS5596383A JP424179A JP424179A JPS5596383A JP S5596383 A JPS5596383 A JP S5596383A JP 424179 A JP424179 A JP 424179A JP 424179 A JP424179 A JP 424179A JP S5596383 A JPS5596383 A JP S5596383A
Authority
JP
Japan
Prior art keywords
pump
revolving
changing
time
discharge pressure
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
JP424179A
Other languages
Japanese (ja)
Inventor
Yukio Terauchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP424179A priority Critical patent/JPS5596383A/en
Publication of JPS5596383A publication Critical patent/JPS5596383A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To perform smoothly changing the number of operating pump by procedure in which the revolving number of changed pump is gradually raised or reduced until the revolving number obtained by calculating the square root of discharge pressure coincides with the revolving number of regulator obtained by pressure regulator at the time of obtaining a command for changing the number of pump to be operated.
CONSTITUTION: To the pump number control circuit, the changing time revolving number decision circuit 11 by which the square root calculation of discharge pressure measured by the discharge pressure meter 8 is made and then the revolving number n1 at the time of addition or reduction of the pump Pa or Pb is determined by multiplying the calculated value by a proper coefficient and the additional revolving number control circuits 12a and 12b by which the revolving number is gradually increased or reduced from the number n1 obtained at the circuit 11 to the revolving number ne of the pressure regulator 9 are provided. Thus, at the time when the number of operating pumps is changed, the number of pump can be very smoothly changed without abruptly changing discharge pressure and discharge flow rate.
COPYRIGHT: (C)1980,JPO&Japio
JP424179A 1979-01-18 1979-01-18 Changer for number of operating pump Pending JPS5596383A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP424179A JPS5596383A (en) 1979-01-18 1979-01-18 Changer for number of operating pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP424179A JPS5596383A (en) 1979-01-18 1979-01-18 Changer for number of operating pump

Publications (1)

Publication Number Publication Date
JPS5596383A true JPS5596383A (en) 1980-07-22

Family

ID=11579042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP424179A Pending JPS5596383A (en) 1979-01-18 1979-01-18 Changer for number of operating pump

Country Status (1)

Country Link
JP (1) JPS5596383A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019989A (en) * 1983-07-12 1985-02-01 Kubota Ltd Speed regulating method in variable speed pump
JP2005344536A (en) * 2004-06-01 2005-12-15 Yaskawa Electric Corp Control device and control method for pump parallel operation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248316U (en) * 1975-10-03 1977-04-06
JPS545183A (en) * 1977-06-15 1979-01-16 Hitachi Ltd Pump number controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248316U (en) * 1975-10-03 1977-04-06
JPS545183A (en) * 1977-06-15 1979-01-16 Hitachi Ltd Pump number controller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6019989A (en) * 1983-07-12 1985-02-01 Kubota Ltd Speed regulating method in variable speed pump
JP2005344536A (en) * 2004-06-01 2005-12-15 Yaskawa Electric Corp Control device and control method for pump parallel operation
JP4662120B2 (en) * 2004-06-01 2011-03-30 株式会社安川電機 Pump parallel operation control device and control method

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