Shrouded fan assembly

Details Shrouded fan assembly Shrouded fan assembly

1980-12-30

1983-09-27

Wilhite, Billy J.

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

123 4149, 277 57, 416228, F04D 2516

Patent

active

044065817

ABSTRACT:
An improved shrouded fan assembly (10, 10') is disclosed which forms a labyrinthian seal between a plurality of fan blades (20, 20') and an annular ring (16, 16') mounted to a non-rotating shroud (15, 15') without the use of a rotating annular shroud. The tip of at least one fan blade (20, 20') defines a slot (21, 21') adapted to receive the annular ring (16, 16') to form a labyrinthian seal therewith. The improvement increases fan efficiency by decreasing undesirable air flows in the shroud gap between the shroud (15, 15') and the tips of the fan blades (20, 20').

REFERENCES:
patent: 3574480 (1971-04-01), Hoepfner
patent: 3635285 (1972-01-01), Davis
patent: 3680977 (1972-08-01), Rabouyt et al.
patent: 3842902 (1974-10-01), Poslusny
patent: 4131156 (1978-12-01), Crumrine, Jr. et al.
patent: 4181172 (1980-01-01), Longhouse
patent: 4213426 (1980-07-01), Longhouse

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