JPS5479306A - Method of ensuring effective net suction head of pump - Google Patents

Method of ensuring effective net suction head of pump

Info

Publication number
JPS5479306A
JPS5479306A JP14507477A JP14507477A JPS5479306A JP S5479306 A JPS5479306 A JP S5479306A JP 14507477 A JP14507477 A JP 14507477A JP 14507477 A JP14507477 A JP 14507477A JP S5479306 A JPS5479306 A JP S5479306A
Authority
JP
Japan
Prior art keywords
turbine
loads
deaerator
interruption
signal
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
JP14507477A
Other languages
Japanese (ja)
Other versions
JPS5751005B2 (en
Inventor
Masahisa Fujimoto
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP14507477A priority Critical patent/JPS5479306A/en
Publication of JPS5479306A publication Critical patent/JPS5479306A/en
Publication of JPS5751005B2 publication Critical patent/JPS5751005B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To ensure titled head, by adjusting the drop ratio of the inner pressure of a deaerator by detecting the sudden reduction or interruption of the loads of a turbine.
CONSTITUTION: An analog signal proportioned to the output of a turbine is produced by means of a turbine 1st stage pressure transmitter 19 in order to detect the interruption and sudden reduction of loads, and the signal and a signal obtained by passing the signal through a primary delay computing element 20 are subtracted by means of an addition and subtraction computing element 21, thus gaining an analog signal analogically proportioned to the coefficient of the variation and the quantity of the variation of the output of the turbine. When there happens the sudden reduction or interruption of the loads, the pressure of turbine bleed to a deaerator 5 lowers in approximately proportional to the loads of the turbine at short time- lag, but the internal pressure of the deaerator drops at a suitable pressure drop ratio, thus ensuring the effective net suction head of a pump.
COPYRIGHT: (C)1979,JPO&Japio
JP14507477A 1977-12-05 1977-12-05 Method of ensuring effective net suction head of pump Granted JPS5479306A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14507477A JPS5479306A (en) 1977-12-05 1977-12-05 Method of ensuring effective net suction head of pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14507477A JPS5479306A (en) 1977-12-05 1977-12-05 Method of ensuring effective net suction head of pump

Publications (2)

Publication Number Publication Date
JPS5479306A true JPS5479306A (en) 1979-06-25
JPS5751005B2 JPS5751005B2 (en) 1982-10-29

Family

ID=15376769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14507477A Granted JPS5479306A (en) 1977-12-05 1977-12-05 Method of ensuring effective net suction head of pump

Country Status (1)

Country Link
JP (1) JPS5479306A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59189205A (en) * 1983-04-11 1984-10-26 株式会社日立製作所 Method and device for controlling flow rate of feedwater
JPS61205307A (en) * 1984-10-05 1986-09-11 Hitachi Ltd Water level controller of deaerator
JPS6380108A (en) * 1986-09-24 1988-04-11 三菱重工業株式会社 Npsh controller for boiler feedwater pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59189205A (en) * 1983-04-11 1984-10-26 株式会社日立製作所 Method and device for controlling flow rate of feedwater
JPS61205307A (en) * 1984-10-05 1986-09-11 Hitachi Ltd Water level controller of deaerator
JPH052801B2 (en) * 1984-10-05 1993-01-13 Hitachi Seisakusho Kk
JPS6380108A (en) * 1986-09-24 1988-04-11 三菱重工業株式会社 Npsh controller for boiler feedwater pump

Also Published As

Publication number Publication date
JPS5751005B2 (en) 1982-10-29

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