JPS54142601A - Method of starting pumps and adjusting their speeds - Google Patents

Method of starting pumps and adjusting their speeds

Info

Publication number
JPS54142601A
JPS54142601A JP4979978A JP4979978A JPS54142601A JP S54142601 A JPS54142601 A JP S54142601A JP 4979978 A JP4979978 A JP 4979978A JP 4979978 A JP4979978 A JP 4979978A JP S54142601 A JPS54142601 A JP S54142601A
Authority
JP
Japan
Prior art keywords
pump
revolutions
follow
speeds
characteristic
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
JP4979978A
Other languages
Japanese (ja)
Inventor
Saburo Maru
Tokimitsu Kuwabara
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 JP4979978A priority Critical patent/JPS54142601A/en
Publication of JPS54142601A publication Critical patent/JPS54142601A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To reduce fluctuations in the quantity of pumped water flow by adjusting the speeds of a follow-up pump and an operating pump and by specifying the opening operation of the discharge valve of the follow-up pump.
CONSTITUTION: The adjustment of the speeds of the follow-up pump and the operating pump and the opening operation of the valve of the follow-up pump are performed after the no discharge pump head reached the number of revolutions showing characteristics exceeding the pressure on the discharge side. By this, the change in the quantity of pumped water flow, ΔQ0, which is the distance between the intersection of the single operation characteristic 14 at the number of revolutions 100% and the pipe passage characteristic 17, and the intersection of the parallel operation characteristic for one pump at the number of revolutions 100% and another pump at the number of revolutions y% and the pipe passage characteristic 17. As a result, undesirable phenomena, such as pressure fluctuation and the like, can be reduced, and at the same time, ΔT0 which is the control time required until the number of revolutions of the operating pump, 11, and the number of revolutions of the follow-up pump, 12, become equal, is shortened.
COPYRIGHT: (C)1979,JPO&Japio
JP4979978A 1978-04-28 1978-04-28 Method of starting pumps and adjusting their speeds Pending JPS54142601A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4979978A JPS54142601A (en) 1978-04-28 1978-04-28 Method of starting pumps and adjusting their speeds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4979978A JPS54142601A (en) 1978-04-28 1978-04-28 Method of starting pumps and adjusting their speeds

Publications (1)

Publication Number Publication Date
JPS54142601A true JPS54142601A (en) 1979-11-07

Family

ID=12841183

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4979978A Pending JPS54142601A (en) 1978-04-28 1978-04-28 Method of starting pumps and adjusting their speeds

Country Status (1)

Country Link
JP (1) JPS54142601A (en)

Similar Documents

Publication Publication Date Title
JPS5440946A (en) Controlling method for pump waterwheel
JPS54142601A (en) Method of starting pumps and adjusting their speeds
JPS5246203A (en) Method of controlling feed-water pumps for power genration plant
JPS56148693A (en) Rated displacement oil pump
JPS57167501A (en) Control circuit of fluid
JPS56143803A (en) Fluid controller
JPS5716207A (en) Feed water turbine pump controller
JPS5776304A (en) Hydraulic circuit for construction machinery
JPS54128808A (en) Control method for gas booster or the like
JPS56160405A (en) Fluid circuit
JPS5490404A (en) Feed water flow rate controller
JPS5788210A (en) Controlling method of degree of superheat on working medium for turbine
JPS563885A (en) Cooling-water flow rate controller of condenser
JPS56164202A (en) Fluidic device
JPS5784924A (en) Gas flow rate control apparatus
JPS55162000A (en) Method of operating multistage steam ejector
JPS5584886A (en) Controling method for a number of pump
JPS5544472A (en) Hydro-hoist
JPS56135781A (en) Apparatus for controlling exhausting pressure and flowing quantity in screw compressor
JPS5375501A (en) Pump flow controller
JPS57163194A (en) Speed increasing apparatus
JPS5417403A (en) Feed water control method
JPS5464283A (en) Target controller for level of water supply pool
JPS5269001A (en) Water delivery control method
JPS56121898A (en) Gas compressor with number-of-revolution control device