JPS56106086A - Controlling device for flow rate of feed water - Google Patents

Controlling device for flow rate of feed water

Info

Publication number
JPS56106086A
JPS56106086A JP832080A JP832080A JPS56106086A JP S56106086 A JPS56106086 A JP S56106086A JP 832080 A JP832080 A JP 832080A JP 832080 A JP832080 A JP 832080A JP S56106086 A JPS56106086 A JP S56106086A
Authority
JP
Japan
Prior art keywords
feed water
rotation
controlling valve
behind
difference
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.)
Granted
Application number
JP832080A
Other languages
Japanese (ja)
Other versions
JPS6345516B2 (en
Inventor
Takashi Mizuno
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 JP832080A priority Critical patent/JPS56106086A/en
Publication of JPS56106086A publication Critical patent/JPS56106086A/en
Publication of JPS6345516B2 publication Critical patent/JPS6345516B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To prevent erosion of a feed water controlling valve by a method wherein an electric motor-driven feed water pump is controlled in the number of rotation and discharge regulation is made by the control of the opening of a feed water controlling valve to keep the difference of pressure before and behind the feed water controlling valve in an intended range.
CONSTITUTION: A rotation number instruction Nc is equal to the rotation number instruction Nb based upon the difference of pressure before and behind the feed water controlling valve and as a system head falls, the number of rotation of the feed water pump falls. If the number of rotation of the feed water pump arrives at the lowest possible number of rotation established by a signal generator 20, the rotation number instruction Nc changes from Nb to Na and in the following low load range the number of rotation of the feed water pump is controlled in a constant value by this lowest possible number of rotation. That is to say, in a high load range the difference of pressure before and behind the feed water controlling valve is controlled in an intended pressure and occurrence of errosion can be prevented. On the other hand, in the throttling course also of the feed water controlling valve in a low load range the pump can be driven when the difference of pressure before and behind the valve does not exceed 20kg/cm2 and therefore a long term operation is possible.
COPYRIGHT: (C)1981,JPO&Japio
JP832080A 1980-01-29 1980-01-29 Controlling device for flow rate of feed water Granted JPS56106086A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP832080A JPS56106086A (en) 1980-01-29 1980-01-29 Controlling device for flow rate of feed water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP832080A JPS56106086A (en) 1980-01-29 1980-01-29 Controlling device for flow rate of feed water

Publications (2)

Publication Number Publication Date
JPS56106086A true JPS56106086A (en) 1981-08-24
JPS6345516B2 JPS6345516B2 (en) 1988-09-09

Family

ID=11689863

Family Applications (1)

Application Number Title Priority Date Filing Date
JP832080A Granted JPS56106086A (en) 1980-01-29 1980-01-29 Controlling device for flow rate of feed water

Country Status (1)

Country Link
JP (1) JPS56106086A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58120142U (en) * 1982-02-05 1983-08-16 日本電信電話株式会社 Sheet transfer device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58120142U (en) * 1982-02-05 1983-08-16 日本電信電話株式会社 Sheet transfer device
JPH026029Y2 (en) * 1982-02-05 1990-02-14

Also Published As

Publication number Publication date
JPS6345516B2 (en) 1988-09-09

Similar Documents

Publication Publication Date Title
JPS55109788A (en) Feed pump control system
JPS57116139A (en) Emergency operating device for electrically controlled injection pump
JPS5399103A (en) Boiler feed water pump controller
JPS57126572A (en) Operation controlling method for water wheel and pump water wheel
JPS56106086A (en) Controlling device for flow rate of feed water
JPS5246203A (en) Method of controlling feed-water pumps for power genration plant
JPS56159583A (en) Control apparatus for pump
JPS5716207A (en) Feed water turbine pump controller
JPS54128808A (en) Control method for gas booster or the like
JPS5622112A (en) Control device for water level of distributing reservoir
JPS55125381A (en) Water supplying method
JPS5756688A (en) Flow rate controller
JPS55107172A (en) Automatic shut-off valve
JPS55123097A (en) Controller for preventing water hammering
JPS563885A (en) Cooling-water flow rate controller of condenser
JPS5572677A (en) Controlling device for circulating pump shutdown
JPS5669484A (en) Control of pressure in conduit
JPS5632078A (en) Energy recovering method
JPS55161985A (en) Pump protector
JPS56164202A (en) Fluidic device
JPS56167888A (en) Controller for water feed pump
JPS56143380A (en) Cooling water controller for multistage compressor
JPS5477303A (en) Automatic start control system of pump
JPS5781106A (en) Turbine driven by low boiling point medium
JPS55107008A (en) System for controlling starting of turbine for driving boiler feed water pump