Low pressure inlet ring subassembly with integral staybars

Details Low pressure inlet ring subassembly with integral staybars Low pressure inlet ring subassembly with integral staybars

1990-10-18

1992-04-14

Kwon, John T.

Rotary kinetic fluid motors or pumps

Casing and spaced housing with space vented to working fluid

415 93, F01D 302

Patent

active

051042851

ABSTRACT:
Integral cast inlet ring sections for low pressure steam turbines are disclosed. Preferably, semicircular inlet ring sections from opposing sides of the steam inlet are joined together by integral staybars to form an inlet ring subassembly. After fabrication into a turbine inner cylinder, the two inlet ring subassemblies are preferably joined by a horizontal joint, such as a bolted connection, to form a circular inlet ring. The present invention eliminates welds and other connections typically associated with staybars and thereby eliminates a source of stress concentration and fatigue failures in steam turbines. The present invention also permits the inlet ring to be welded to a flange in a manner which eliminates potential delamination of the flange by fusing the sites of potential delamination.

REFERENCES:
patent: 4029432 (1977-06-01), Meylan et al.
patent: 4232993 (1980-11-01), Ikeda
patent: 4863341 (1989-09-01), Groenendaal
patent: 4915581 (1990-04-01), Groenendaal, Jr. et al.

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