Labyrinthine turbine-rotor-blade tip seal

Details Labyrinthine turbine-rotor-blade tip seal Labyrinthine turbine-rotor-blade tip seal

1986-05-14

1987-07-28

Croyle, Carlton R.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Means to seal radial flow pump runner inlet from outlet

416228, F01D 520

Patent

active

046829334

ABSTRACT:
Means for sealing the tip 18 of a rotor turbine blade 10 against tip leakage flow comprising a multiplicity of recesses 30 formed in the surface of the tip 18. The recesses 30 are preferably formed in a labyrinthine or slaggered pattern which interposes at least one recess 30 in every leakage flow path across the tip 18 from the pressure side 26 to the suction side 28 of the blade 10.

REFERENCES:
patent: 2378372 (1945-06-01), Whittle
patent: 2622843 (1952-12-01), Williams
patent: 3082010 (1963-03-01), Morley et al.
patent: 3885886 (1975-05-01), Richter
patent: 4239452 (1980-12-01), Roberts, Jr.
patent: 4247254 (1981-01-01), Zelahy
patent: 4390320 (1983-06-01), Eiswerth
patent: 4411597 (1983-10-01), Koffel et al.
patent: 4424001 (1984-01-01), North et al.

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