Turbine rotor having improved rim durability
AssigneeAlliedSignal Inc.
InventorHarry L. Kington
Life of this patent
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Abstract
A turbine rotor is formed from a turbine disk having a rim with a circumferential direction, and a plurality of turbine blade segments each fixed to the turbine disk around a circumference of the rim of the turbine disk. The turbine blade segments are oriented such that the elastic modulus of the turbine blade segments parallel to the circumferential direction is less than that of the rim of the turbine disk parallel to the circumferential direction. This arrangement is preferably achieved using single crystal turbine blade segments made of an an alloy having a cubic crystal structure, such as a nickel-based superalloy, with a <010> direction oriented radially and a <001> direction oriented circumferentially.
Claims6
A turbine rotor, comprising:
- a turbine disk having radial and circumferential directions;
- and
- a plurality of single-crystal turbine blade segments fixed to the turbine disk around a circumference of a rim of the turbine disk, each turbine blade segment being made of a material having a cubic crystal structure and having a <010>
- direction oriented parallel to the radial direction of the turbine disk and a <001>
- direction oriented substantially parallel to the circumferential direction of the turbine disk in the region where the turbine blade segment is fixed to the turbine disk.
Dependencies are inferred from the claim text.