Title:
METHOD AND DEVICE FOR COOLING STEAM TURBINE IN SINGLE-SHAFT COMBINED PLANT
Document Type and Number:
Japanese Patent JPS62251409
Kind Code:
A
Abstract:
PURPOSE:To prevent a steam turbine from being heated due to windage loss, by providing a control device which inputs output signals from a sensor, detecting a rotary speed, and from a sensor, detecting the pressure of low pressure steam, and transmits an opening and closing signal of a low pressure main steam control valve. CONSTITUTION:A rotary speed is detected by a pickup 30, and a speed signal 31 is generated. The pressure of low pressure steam is detected by a thermocouple 32, and a signal 32 is generated. These signals are input to a control unit 36. A low pressure main steam control valve opening and closing signal 37, output from the control unit 36, is input to a low pressure steam valve opening and closing actuator 38. In this way, when a single-shaft combined plant is started, a low pressure control valve 24 can be opened for ensuring cooling steam. Thus a steam turbine can be prevented from being heated due to windage loss.
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Inventors:
OKABE AKIRA
Application Number:
JP9484686A
Publication Date:
November 02, 1987
Filing Date:
April 25, 1986
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F01K7/20; F01D19/00; F01K13/02; F01K23/10; (IPC1-7): F01K7/20; F01K23/10
Domestic Patent References:
| JPS58117306A | 1983-07-12 | |||
| JPS59218310A | 1984-12-08 |
Attorney, Agent or Firm:
Masami Akimoto