Flange bolt for turbines

Details Flange bolt for turbines Flange bolt for turbines

2006-05-02

2006-05-02

Verdier, Christopher (Department: 3745)

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Temperature or fluid force responsive member

C415S116000, C415S175000, C415S178000, C415S214100, C403S034000, C403S037000, C403S023000, C403S335000, C403S337000, C403S338000, C285S047000, C285S368000, C285S412000, C411S389000, C411S395000, C411S537000, C411S544000

Reexamination Certificate

active

07037065

ABSTRACT:
An arrangement for cooling or heating of a flange bolt for turbines comprises one or more boreholes, that extend through the bolt, and inlet and outlet pipes that are connected to each end of the borehole. A cooling or heating medium such as air, steam or any other fluid flows through an inlet pipe into and through the borehole thereby cooling or heating the bolt, and exits from the borehole via an outlet pipe. The cooling or heating arrangement enables direct cooling or heating of the bolt itself and ensures stable bolting forces throughout the operation of the turbine. The flange bolts with this arrangement may be applied to gas turbines or steam turbines operated at elevated steam temperatures and pressures.

REFERENCES:
patent: 1873743 (1932-08-01), Doran
patent: 1957700 (1934-05-01), Dahlstrand
patent: 2320398 (1943-06-01), Zetterquist
patent: 3209640 (1965-10-01), Waivers
patent: 3245708 (1966-04-01), Kooistra
patent: 4184785 (1980-01-01), Marjollet et al.
patent: 4884934 (1989-12-01), Ikeda et al.
patent: 5133641 (1992-07-01), Groenendaal et al.
patent: 6273675 (2001-08-01), Magoshi et al.
patent: 306453 (1955-04-01), None
patent: 385248 (1964-12-01), None
patent: 540678 (1931-12-01), None
patent: 3733243 (1988-04-01), None
patent: 11-166520 (1997-05-01), None

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