Rotary expansible chamber devices – With mechanical sealing
Patent
1998-02-10
2000-08-01
Denion, Thomas
Rotary expansible chamber devices
With mechanical sealing
4182011, 418 97, 277351, 277430, 277562, 277565, 277551, F01C 1900
Patent
active
060957808
ABSTRACT:
A device is provided for sealing a rotor shaft supported on a bearing mounted in a housing of an appliance for compressing or expanding a fluid containing, apart from the housing, at least one rotor mounted therein. The sealing device is situated between the rotor and the bearing around the rotor shaft and includes at least two zero contact or frictionless seals. The sealing device successively includes between the rotor and the bearing a first zero contact seal; a double, reverse lip seal with two lips; and a second zero contact seal. The two lips are partly directed towards one another and partly directed towards the rotor shaft along their backsides. An entry for fluid under pressure opens between the lips, whereby the lips, depending on the pressure between them, are in contact with to the rotor shaft or are lifted from the rotor shaft.
REFERENCES:
patent: 3656824 (1972-04-01), Ullberg
patent: 4781553 (1988-11-01), Nomura et al.
patent: 4819949 (1989-04-01), Otto
patent: 5626345 (1997-05-01), Wallace
patent: 5836753 (1998-11-01), Takei et al.
Atlas Copco Airpower, Naamloze vennootschap
Denion Thomas
Trieu Theresa
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