Low-pressure steam turbine hood and inner casing supported on curb foundation
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United States of America Patent
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Mar 26, 2013
Grant Date -
Jun 16, 2011
app pub date -
Dec 16, 2009
filing date -
Dec 16, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A support arrangement for an exhaust hood. The inner casing in the inventive arrangement is supported directly by the curb foundation. As a result, the effect of pressure changes in the exhaust hood are eliminated and the effect of temperature changes of the exhaust hood are reduced relative to the positioning of the inner casing and the rotor within it. Shaft bearings may be outside the exhaust hood located in a standard directly on the foundation. Rotor end packing may also be attached to the standard. The exhaust hood can be a much simpler design with less structural supports and less fabrication time. Easier maintenance is facilitated because the shaft bearings are not tucked under the exhaust hood and the end packing can be removed without removal of a large section of the exhaust hood.
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