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

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)

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 Variable speed pump speed adjustment method
JP2005344536A (en) * 2004-06-01 2005-12-15 Yaskawa Electric Corp Pump parallel operation control device and control method

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 (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 Variable speed pump speed adjustment method
JP2005344536A (en) * 2004-06-01 2005-12-15 Yaskawa Electric Corp Pump parallel operation control device and control method

Similar Documents

Publication Publication Date Title
JPS5596383A (en) Changer for number of operating pump
JPS5340167A (en) Hydraulic circuit
JPS5440946A (en) Controlling method for pump waterwheel
JPS5422068A (en) Control valve for machine
JPS64394A (en) Device for preventing surging in compressor
JPS5246203A (en) Method of controlling feed-water pumps for power genration plant
JPS5620787A (en) Minimum flow control in pump
JPS5681286A (en) Control system for number of pumps or others
JPS5490404A (en) Feed water flow rate controller
JPS5654979A (en) Pump controlling method
JPS53110101A (en) Number of pump in operation control device
JPS5697108A (en) Control method of number of set of pump
JPS56146086A (en) Controller for number of pump
JPS5712890A (en) Controller of aeration amount in aeration vessel
JPS5584886A (en) Controling method for a number of pump
JPS5428907A (en) Turbine control system with rotor stress prediction
JPS54149903A (en) Water supply flow control of pumps
JPS55131812A (en) Gate control method of dam
JPS5428979A (en) Control circuit of variable capacity pump
JPS5628946A (en) Dredging device of automatically-controlled series pump type
JPS56113085A (en) Operation method for pump
JPS5269001A (en) Water delivery control method
JPS5652595A (en) Multivane compressor
JPS5781684A (en) Inflow calculating device
JPS52138701A (en) Cavitation preventing device of main consenser pump