Steam turbine control apparatus

Details Steam turbine control apparatus Steam turbine control apparatus

1981-09-25

1983-08-16

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Having apparatus cleaning, sealing, lubricating, purging,...

60662, 137495, 251 28, F01D 2102

Patent

active

043983936

ABSTRACT:
Control apparatus is disclosed for limiting overspeed in a steam turbine following a sudden loss in load. The apparatus includes at least one valve disposed in the steam conduit interconnecting higher and lower pressure sections of the turbine and an actuator for controlling operation of the valve between a fully open position and a pressure-relief position wherein the valve functions as a pressure relief valve. During normal operation, the valve is maintained in the fully open position. On receipt of a turbine overspeed signal, the valve is actuated to the pressure relief position and a volume of steam at a preselected pressure, necessary to open the valve, is held back within the turbine stages, crossovers, and so forth. This retained steam is thus prevented from adding energy to increase the speed of the turbine rotor. During turbine startup, the valve is operated in its pressure relief position to permit preheating of the higher pressure sections of the turbine, avoiding long and costly startup procedures.

REFERENCES:
patent: 2540691 (1951-02-01), Reese et al.
patent: 2586510 (1952-02-01), Bryant
patent: 2586511 (1952-02-01), Bryant

Affiliated with

Also associated with

Rating

Steam turbine control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Steam turbine control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steam turbine control apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-808230