Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part
Patent
1997-05-12
1998-12-08
Kwon, John T.
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
F04D 2908
Patent
active
058460519
ABSTRACT:
A sealing device for dust- and liquid-aspirating machines, comprising an electric motor provided with a shaft, to a cantilevered free end whereof an axial suction impeller is fixed, the impeller being contained in a casing wherein one or more delivery ducts are formed peripherally. The device further comprises an axially perforated disk-shaped element associated with the shaft, interposed between the motor and the casing, and having a perimetric surface shaped so as to form at least two successive tapering regions between which a change in diameter is interposed and forms a step, the configuration of the disk-shaped element being adapted to repel the liquid by centrifugal action and to dissipate its energy in association with the facing surface of a flanged sealing element having a hollow section that encapsulates part of the electric motor, and a flange connected to the casing upon assembly.
REFERENCES:
patent: 2993711 (1961-07-01), Pears
patent: 5026253 (1991-06-01), Borger
patent: 5275530 (1994-01-01), Kujawa et al.
Josif Albert
Kwon John T.
Modiano Guido
Rotafil S.a.s. Di Vincenzo Massaro E C.
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