F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/39
F16J 15/32 (2006.01) F16J 15/00 (2006.01) F16J 15/16 (2006.01) F16J 15/34 (2006.01) F16J 15/38 (2006.01) F16J 15/54 (2006.01)
Patent
CA 1135742
Abstract of the Disclosure The subject of the invention is a seal for the gap between a revolving shaft and a housing bore. At low rotational speeds and at standstill, an annular, spring-loaded packing lip of elastomeric material provides the sealing effect. With increas- ing speed, the pressure of the packing lip against the counter- face is reduced by the centrifugal force and the sealing effect is shifted to a dynamic sealing flange. The latter revolves with the shaft and its end face is in sliding contact with a stationary surface facing in the direction of the medium to be sealed off. The flange has holes that permeate it completely in radial and axial direction and that are interconnected. The flange is made from an internally cemented granulate, or from fibres or plates. The sealing effect results from the fact that the medium to be sealed off, after penetrating the wetted surfaces of the flange, is deflected by the effective centrifugal force towards the outer perimeter and is returned cyclically to the sealed space. The components of the medium that have lower speci- fic gravity, preferably air contained in the medium, at the same time effect a continuous removal of heat, a lubrication and a dynamic sealing of the end face of the flange and the stationary radial surface that slide one over the other.
341748
Borden Ladner Gervais Llp
Freudenberg Carl
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