Turbine rotor and turbine blade

Details Turbine rotor and turbine blade Turbine rotor and turbine blade

2007-04-03

2010-11-30

Edgar, Richard (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

C416S248000

Reexamination Certificate

active

07841833

ABSTRACT:
A turbine rotor improved in machinability, appropriately balanced in stress, and having rotor hooks and rotor necks constructed to form an attachment structure with respect to an inverted fir tree blade root that has blade hooks and blade necks. The turbine rotor has rotor hooks and rotor necks constructed to form an attachment structure with respect to an inverted fir tree blade root that has blade hooks and blade necks with an “n” number of hooks, where n≧3. In this structure, a convex portion of the innermost circumferential rotor hook is formed to be concave in a circumferential direction, with respect to a tangential line that connects a convex portion of the (n−1)th hook from the outermost circumferential rotor hook, and a convex portion of the (n−2)th hook.

REFERENCES:
patent: 5152669 (1992-10-01), Heinig et al.
patent: 4-231602 (1992-08-01), None
patent: 5-086805 (1993-04-01), None
patent: 7-72485 (1995-08-01), None
patent: 2877150 (1999-01-01), None

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