Westinghouse Electric Corporation

Bernard L LaCoste

Suryakant K Dawawala

Robert John Nelson

Thomas H McCloskey

Lloyd W Smith

Thomas J Finnimore

A control valve particularly for use in a steam power plant includes a hollow valve body having a pair of aligned openings therethrough. A cylindrical valve bonnet extends through one of the openings in the valve body and is secured to the valve body. A cylindrical plug guide is secured to the end of the valve bonnet within the valve body and extends lonitudinally from the valve bonnet to the other opening in the valve body. A stationary valve seat is secured to the end of the plug guide adjacent the other opening in the valve body. A valve plug is slidably mounted in said valve guide and valve bonnet for movement toward and away from the valve seat. Actuating means extends through the valve bonnet and is connect to the valve plug for moving the valve plug into and out of engagement with the valve seat.

Control valve

A control valve for cyclic duty steam turbines having a one piece bonnet configuration which has been designed to minimize the affects of and withstand expected cyclic stresses during hot, warm and cold startup conditions of turbines utilized for peak loading.

Steam turbine control valve for cyclic duty

A power generation system and method of operation for generating electricity by utilizing temperature differences inherently present in the ocean between water near the surface and water from the ocean's depths. A pump provides relatively warm, surface ocean water to a flash evaporator where a portion of the water is flashed into steam. The steam is expanded through a subatmospheric pressure range turbine which exhausts into a condensing enclosure. The steam exhausting into the enclosure is condensed by relatively cold ocean water pumped thereinto. The turbine drives a generator and thus produces the electricity. The turbine speed and generator output are controlled by selectively introducing atmospheric air and relatively warm water into the exhausted motive steam flow. Such selective introduction into the exhausted steam flow of air and/or relatively warm water increases the absolute pressure at the turbine's exhaust end and thus reduces steam flow through the turbine. Adjusting regulating valves for the air and warm water flows in response to changes in turbine speed and/or generator load provides means for regulating the speed of the turbine and generating load.

Ocean thermal energy conversion system

A valve apparatus for controlling fluid flow therethrough. A valve support body attached to an elongated stem is housed in an internal opening of a valve body which is externally mateable with a valve seat. Mateable surfaces on the valve body and valve seat are spherical so as to ensure complete engagement therebetween for misalignments between the stem-supported valve body and the valve seat. An antivibration or stabilizing ring situated between the support body and the valve body within the internal opening permits rotation of the valve body about the support body during valve closure to compensate for large stem-valve seat misalignments while restricting relative oscillatory, vibrating motion between the support body and valve body when the valve is in the open, unengaged configuration. Maximum vibration resistance and free rotatability of the valve body is obtained by disposing the stabilizing ring to occupy a position in the plane formed by the contact line between the valve body and seat. A portion of the support body is spherical in shape so as to promote its mateability with a spherical surface which partially bounds the internal valve body opening. In the open, unengaged configuration, the valve body and valve support body are held in intimate contact at these spherical surfaces, by weight and pressure drop forces.

Vibration resistant valve

Ocean thermal energy conversion system and method for operation

A shaft seal device for a butterfly valve shaft wherein a friction face seal device having a flexible double bellows arrangement thereon is disposed within a seal chamber between a contaminated source of pressurized steam and a low pressure gland condenser. A buffer layer of uncontaminated steam having a pressure higher than the pressure of the contaminated steam is introduced into the seal chamber through conduit means. The buffer layer of uncontaminated steam having a pressure higher than the pressure of the contaminated steam is disposed between the contaminated steam source and the gland condenser to insure zero leakage of contaminated steam past the double bellows seal device into the gland condenser.

Growing community of inventors

Wilmington, DE, United States of America

Bernard L LaCoste