Rotary kinetic fluid motors or pumps – With sound or vibratory wave absorbing or preventing means...
Patent
1994-03-30
1995-11-14
Kwon, John T.
Rotary kinetic fluid motors or pumps
With sound or vibratory wave absorbing or preventing means...
415191, F04D 2966
Patent
active
054661200
ABSTRACT:
A blower comprising an axial-flow fan covered by a cylindrical shroud and a motor for driving the fan. The motor is supported by radially extending stays at the central region of the fan on the suction side of the fan. The stays are integrally formed with a central support for the motor and an outer cylindrical shroud covering the fan. Each of the stays is bent and subdivided into an outer portion near the shroud and an inner portion near the support ring. The outer portion extends along a radial line about the axis of the fan, and the inner portion extends at an inclination to a radial line about the axis of the fan so as to reduce noise induced when air passes through the stays and the fan. The blower can also include a protection net comprising annular ribs circumferentially interconnecting the adjacent stays. Each of the annular ribs has a streamlined cross-sectional shape. The center line of the inner annular ribs is arranged in parallel to the axis of the fan, and the center line of the outer annular ribs is arranged at an inclination to the axis of the fan.
REFERENCES:
patent: 2154313 (1939-04-01), McMahan
patent: 3995970 (1976-12-01), Yamaguchi
patent: 4636669 (1987-01-01), Plunkett et al.
patent: 4761115 (1988-08-01), Hopfensperger
patent: 5118252 (1992-06-01), Chney
patent: 5259726 (1993-11-01), Bacria
Takeuchi Kazuhiro
Yamanaka Akira
Kwon John T.
Nippondenso Co. Ltd.
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