Apparatus for raising the dynamic performance limit of steam flo

Details Apparatus for raising the dynamic performance limit of steam flo Apparatus for raising the dynamic performance limit of steam flo

1976-05-07

1977-11-08

Croyle, Carlton R.

Rotary kinetic fluid motors or pumps

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

415172A, 277 53, F01D 1102, F04D 2908, F02F 1100

Patent

active

040573621

ABSTRACT:
An apparatus for raising the dynamic performance limit of steam flow and gas flow turbines and compressors, in which a non-contacting seal is arranged in a clearance between a stationary wall in the form of a ring and a rotatable member while a non-contacting seal is arranged in the clearing and supported by the ring. The seal forms a labyrinth seal and includes throttling elements. The ring is surrounded by a housing arranged in radially spaced relationship to the ring and defining therewith an annular gap. The labyrinth seal includes an active section and at least one throttling element. The ring is provided with radially extending passages located ahead of the active section of the seal and past at least one of the throttling elements. The dimensions of the passages and of at least one of the throttling elements are so selected that the major portion of the leakage flow is passed into the clearance through the passages.

REFERENCES:
patent: 1463018 (1923-07-01), Junggren
patent: 2846245 (1958-08-01), Weaver
patent: 3501246 (1970-03-01), Hickey
patent: 3594010 (1971-07-01), Warth
patent: 3897169 (1975-07-01), Fowler

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