Turbomachine stator interstage seal

Details Turbomachine stator interstage seal Turbomachine stator interstage seal

1976-10-13

1977-12-20

Vrablik, John J.

Rotary kinetic fluid motors or pumps

Including thermal expansion joint

415217, 415219R, 277204, 277236, F01D 2526, F01D 900, F04D 2940, F16J 1548

Patent

active

040638456

ABSTRACT:
Successive outer stator shroud rings of a gas turbine confront each other at the downstream edge of one and the upstream edge of the other, with a gap between them. To seal against leakage through this gap, edges of the shrouds have grooves aligned to define an annular cavity of generally rectangular cross section in the shrouds. A thin flexible coiled metal strip of about 720.degree. extent is disposed in the cavity, with the strip overlapping itself to form a double layer. Layers of the strip are slidable relative to each other to allow the strip to expand and contract with the shrouds and abut outer or inner walls of the cavity to provide the seal.

REFERENCES:
patent: 843740 (1907-02-01), Fenn
patent: 1543963 (1925-06-01), Walton
patent: 2819919 (1958-01-01), Pearce et al.
patent: 2991045 (1961-07-01), Tassoni
patent: 3004700 (1961-10-01), Warren
patent: 3132870 (1964-05-01), Pschera
patent: 3728041 (1973-04-01), Bertelson
patent: 3754766 (1973-08-01), Asplund
patent: 3869222 (1975-03-01), Rahnke et al.

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