JPS5479306A - Method of ensuring effective net suction head of pump - Google Patents
Method of ensuring effective net suction head of pumpInfo
- 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
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
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)
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 |
-
1977
- 1977-12-05 JP JP14507477A patent/JPS5479306A/en active Granted
Cited By (4)
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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