Back to results
US 7,841,833 B2Granted
Turbine rotor and turbine blade
AssigneeHitachi, Ltd.
InventorsFumiyuki Suzuki, Kunio Asai, Takeshi Kudo, Tateki Nakamura
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeHitachi, Ltd.
InventorsFumiyuki Suzuki, Kunio Asai, Takeshi Kudo, Tateki Nakamura
Estimating the term…
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.
A turbine rotor with a rotor hook and a rotor neck constructed to form an attachment structure with respect to an inverted fir tree blade root having blade hooks and blade necks with an “n” number of the hooks (n≧3), wherein:
An inverted fir tree type turbine rotating blade with blade hooks and blade necks with an “n” number of the hooks (n≧3), the hooks being constructed to form an attachment structure with respect to a turbine rotor which has rotor hooks and rotor necks, wherein:
Dependencies are inferred from the claim text.