Turbomachine rotor construction including a serrated root sectio

Details Turbomachine rotor construction including a serrated root sectio Turbomachine rotor construction including a serrated root sectio

1995-09-14

1997-01-14

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade received in well or slot

416248, F01D 530, F01D 520, F01D 528

Patent

active

055932827

ABSTRACT:
A rotor of a turbomachine includes blades having an improved blade root configuration for anchoring and centering the blade roots in axial slots of the rotor disk. Each blade root includes two portions or sections, namely a serrated section that has a single bilaterally uniformly shaped serration, and a terminal portion that has rounded surfaces and a narrower cross-section than the serrated root section. The serrated section provides anchoring against centrifugal forces. The terminal portion provides the predominant centering effect, for which it is radially movably received and located in a recess provided in the bottom of the slot. The special root configuration substantially avoids misfit and centering problems associated with manufacturing variances, whereby the blades and blade roots can be made of lightweight engineering materials.

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