F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
60/45
F01D 25/12 (2006.01) F01D 9/06 (2006.01) F01D 25/14 (2006.01) F01D 25/26 (2006.01)
Patent
CA 1279765
ABSTRACT OF THE DISCLOSURE Apparatus and method for reducing thermal stress in the casings of a steam turbine. A novel inlet sleeve carries high pressure steam from the bell connector of an inlet pipe through the turbine inner casing. The inlet sleeve is connected at a first end to the bell connector and secured at a mid portion to the inner casing so that the second end of the inlet sleeve may terminate adjacent the inner casing wall without contacting the inner casing. This connection means forms a cylindrical chamber having a closed end at the mid portion of the inlet sleeve and an open end adjacent the inner wall of the turbine inner casing. The cylindrical chamber provides a thermal shield which isolates portions of the turbine inner casing adjacent the inlet sleeve from the rapid steam flow between the inlet pipe and the turbine blading.
557168
Bereskin & Parr
Westinghouse Electric Corporation
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