Turbine generator pressure relief diaphragm

Details Turbine generator pressure relief diaphragm Turbine generator pressure relief diaphragm

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 21/14 (2006.01) F01D 25/24 (2006.01) F16K 17/16 (2006.01)

Patent

CA 2101656

ABSTRACT OF THE DISCLOSURE A steam turbine includes a turbine housing oper- able to receive steam and having a relief opening therein surrounded by a turbine flange. A shaft is positioned within said housing and includes a plurality of rows of blades positioned along the longitudinal length thereof. A steam inlet pipe is connected with the housing and is operable as a conduit to allow the steam entering the housing to pass between said plurality of rows of blades to rotate said shaft. A pressure relief diaphragm is associated with the turbine housing and is operable to relieve excessive pressure within the turbine housing to prevent damage to the turbine blades. The pressure relief diaphragm includes a safety housing having a mounting flange thereon arranged to mate with the turbine flange so that the safety housing is positioned over the relief opening in the turbine housing. A first solid, frangible solid disc covers the relief opening in the turbine housing and has a peripheral portion interposed between the mounting flange on the safety housing and the turbine flange. A second solid disc is positioned in the relief opening in the turbine flange in abutting contact with the first solid disc. A first plurality of bolts secures the mounting flange on the safety housing to the turbine flange. Spring washers associated with the first plural- ity of bolts maintain the positional relationship between the safety housing and the turbine flange. An annular ring is positioned on the first solid disc and above the relief opening in said turbine housing. A second plural- ity of bolts secures the second solid disc and the annular ring to the first solid disc. Spring washers associated with the second plurality of bolts maintains the posi- tional relationship among the first solid disc, the second solid disc and the annular ring.

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