Blower fan blade passage rate noise control scheme

Details Blower fan blade passage rate noise control scheme Blower fan blade passage rate noise control scheme

1997-07-17

2000-03-21

Look, Edward K.

Rotary kinetic fluid motors or pumps

With sound or vibratory wave absorbing or preventing means...

415206, 4152083, 4152111, F01D 510

Patent

active

06039532&

ABSTRACT:
An blower of the squirrel cage type that includes a baffle extending from the cut-off area between the impeller and the air outlet for providing a gradual decrease in air flow area between the impeller and the housing. The baffle decreases in width with a leading edge that follows a linear or non-linear curve to effect the gradual change in air flow area. This gradual change in the air flow area reduces the pressure pulse at the cut-off area and thereby reduces noise and vibration and improves the efficiency of the blower.

REFERENCES:
patent: 3034702 (1962-05-01), Larsson et al.
patent: 3687360 (1972-08-01), Prew et al.
patent: 4680006 (1987-07-01), Fisher
patent: 5279515 (1994-01-01), Moore et al.
patent: 5340275 (1994-08-01), Eisinger
patent: 5536140 (1996-07-01), Wagner et al.

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