Boots – shoes – and leggings
Patent
1982-07-12
1984-09-11
Wise, Edward J.
Boots, shoes, and leggings
60663, 415 17, F01K 1302
Patent
active
044714467
ABSTRACT:
A DEH (digital electrohydraulic) control system for a steam turbine generator having a steam bypass system. The turbine system includes a high pressure turbine having throttle and governor steam admission valves as well as an intermediate pressure turbine having stop and interceptor steam admission valves. The turbine is brought on line by initially controlling steam admission into the intermediate pressure turbine by modulating the interceptor valve in response to a speed error signal generated as a result of the difference between actual and a predetermined reference speed. During this initial control the throttle valve remains in a closed position. When the turbine speed has attained a preset value such as half of synchronous speed, the interceptor valve is held at the same position it was in when the preset speed was attained and the throttle valve is controllably open in response to the same speed error signal. After a preset transfer speed has been attained, control of steam admission to the high pressure turbine is transferred to the governor valve and after synchronous speed has been reached the DEH system switches to a load control mode wherein the signal which controls the positioning of the governor valve is also utilized to control the interceptor valve position. The interceptor valve thereafter will reach a wide open position at a predetermined load.
During the speed control mode of operation the control signal which controls the positioning of the interceptor valve is modified by certain pressure conditions at the input of the interceptor valve after the preset speed is attained.
REFERENCES:
patent: 3986788 (1976-10-01), Rossi
patent: 4007595 (1977-02-01), Braytenbah
patent: 4015430 (1977-04-01), Braytenbah
patent: 4056331 (1977-11-01), Sato
patent: 4090065 (1978-05-01), Braytenbah et al.
patent: 4091450 (1978-05-01), Bloch et al.
patent: 4096699 (1978-06-01), Zitelli
patent: 4120159 (1978-10-01), Matsumoto et al.
patent: 4146270 (1979-03-01), Nurnberger et al.
patent: 4166221 (1979-08-01), McGaha et al.
patent: 4184337 (1980-01-01), Bloch
patent: 4204258 (1980-05-01), Zitelli et al.
patent: 4205380 (1980-05-01), Braytenbah
patent: 4274260 (1981-06-01), Bukajilo
patent: 4360882 (1982-11-01), Stewart et al.
patent: 4403476 (1983-09-01), Johnson et al.
Binstock Morton H.
McCloskey Thomas H.
Podolsky Leaman B.
Schron D.
Westinghouse Electric Corp.
Wise Edward J.
LandOfFree
Control system and method for a steam turbine having a steam byp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control system and method for a steam turbine having a steam byp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system and method for a steam turbine having a steam byp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1198789