JPS5584886A - Controling method for a number of pump - Google Patents

Controling method for a number of pump

Info

Publication number
JPS5584886A
JPS5584886A JP15883678A JP15883678A JPS5584886A JP S5584886 A JPS5584886 A JP S5584886A JP 15883678 A JP15883678 A JP 15883678A JP 15883678 A JP15883678 A JP 15883678A JP S5584886 A JPS5584886 A JP S5584886A
Authority
JP
Japan
Prior art keywords
pump
point
flow
curve
operate
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
JP15883678A
Other languages
Japanese (ja)
Inventor
Takeshi Yokoyama
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 JP15883678A priority Critical patent/JPS5584886A/en
Publication of JPS5584886A publication Critical patent/JPS5584886A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)
  • Feedback Control In General (AREA)
  • Flow Control (AREA)

Abstract

PURPOSE: To prevent a pump from the operation at an abnormal condition and prevent a motor from an overload operation by a system wherein a number of operating pumps and a flow control target are determined by adding the operation number compensation in order to maintain the compensation value of the suction head.
CONSTITUTION: When a pump 4-1 is demanding the flow rate at P2 point against a pump discharging the flow Q1 at P1 point along (Q-H)1 curve, the cavitation range may exist at P1 point and P2 points. In this case, since the operation at P2 point may be impossible, a pump is added to operate, and a control valve 5 provided for the main discharge pipe is throttled to vary from a pipe resistance curve R1 to R2, allowing to operate the pump at the cross point P3 with (Q-H)2 curve during the operation of two pumps to obtain the desired flow Q2, and the flow of one pump is changed to Q2/2 to allow the operation point of respective pump to run at P3' for refraining remarkably from the cavitation range.
COPYRIGHT: (C)1980,JPO&Japio
JP15883678A 1978-12-22 1978-12-22 Controling method for a number of pump Pending JPS5584886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15883678A JPS5584886A (en) 1978-12-22 1978-12-22 Controling method for a number of pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15883678A JPS5584886A (en) 1978-12-22 1978-12-22 Controling method for a number of pump

Publications (1)

Publication Number Publication Date
JPS5584886A true JPS5584886A (en) 1980-06-26

Family

ID=15680448

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15883678A Pending JPS5584886A (en) 1978-12-22 1978-12-22 Controling method for a number of pump

Country Status (1)

Country Link
JP (1) JPS5584886A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60144803A (en) * 1984-12-14 1985-07-31 Hitachi Ltd Feedback control device
JPS6184702A (en) * 1984-10-01 1986-04-30 Toshiba Corp Controller of intake flow
JPS6258301A (en) * 1985-09-09 1987-03-14 Toshiba Corp Plant controller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184702A (en) * 1984-10-01 1986-04-30 Toshiba Corp Controller of intake flow
JPS60144803A (en) * 1984-12-14 1985-07-31 Hitachi Ltd Feedback control device
JPS6258301A (en) * 1985-09-09 1987-03-14 Toshiba Corp Plant controller

Similar Documents

Publication Publication Date Title
JPS5584886A (en) Controling method for a number of pump
JPS56143803A (en) Fluid controller
EP0118403B1 (en) Back flow preventing device in the outlet pipe of a pump
JPS56148693A (en) Rated displacement oil pump
JPS5773203A (en) Oil pressure circuit
JPS55142993A (en) Volume control for centrifugal compressor
JPS5641477A (en) Driving method of group of rainwater and sewage pumps
JPS5681286A (en) Control system for number of pumps or others
JPS5776304A (en) Hydraulic circuit for construction machinery
JPS5628946A (en) Dredging device of automatically-controlled series pump type
JPS5713295A (en) Hydraulic drive unit
JPS5672289A (en) Constant delivery pressure pump
JPS5762983A (en) Parallel running system of pump
JPS56113085A (en) Operation method for pump
JPS5654979A (en) Pump controlling method
JPS55143603A (en) Controlling method for number of pump
JPS55160196A (en) Constant-discharge-pressure pump
JPS56138479A (en) Pump control unit
JPS5596383A (en) Changer for number of operating pump
SU1076671A1 (en) Device for filling hydraulic transmission
JPS54142601A (en) Method of starting pumps and adjusting their speeds
JPS5536680A (en) Flow control valve
JPS5496803A (en) Impeller for spiral swash plate pump
JPS5668804A (en) Pump group operation control device
JPS5680554A (en) Limiting method of input to hydraulically driven system