Axial shaft seal
AssigneeCarl Freudenberg KG
InventorsThomas Klenk, Eberhard Bock, Thomas Kramer, Werner Hufnagel, Martin Heldmann, Markus Clemens, Gilbert Pataille
Life of this patent
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Abstract
An axial shaft seal disposed between a housing wall and a rotating shaft includes an outer ring insertable into the housing wall in a stationary and sealing manner and an inner ring connectable to the shaft in a non-twisting and sealing manner. The outer ring includes a sleeve having a polymer material extending radially inward and having a spring bellows form. A radially inward end portion of the sleeve has a first sealing surface. The inner ring includes a ring flange extending radially outward so as to provide a second sealing surface for axially mating the first sealing face.
Claims19
An axial shaft seal disposed between a housing wall and a rotating shaft, the axial shaft seal comprising:
- an outer ring insertable into the housing wall in a stationary and sealing manner, the outer ring including a sleeve including a polymer material having a curved bellows form and providing a spring, the curved bellows form extending radially inward over its entire length, a radially inward end portion of the sleeve having a first sealing surface;
- and
- an inner ring connectable to the shaft in a non-twisting and sealing manner and including a ring flange extending radially outward so as to provide a second sealing surface for axially mating the first sealing surface,
- wherein the spring urges the first sealing surface against the second sealing surface;
- and
- the inward end portion deviates from a radial normal direction by up to a maximum of 30°, when not axially mating the second sealing surface.
An axial shaft seal disposed between a housing wall and a rotating shaft, the axial shaft seal comprising:
- an outer ring insertable into the housing wall in a stationary and sealing manner, the outer ring including a sleeve including a polymer material extending radially inward and having a spring bellows form, a radially inward end portion of the sleeve having a first sealing surface;
- an inner ring connectable to the shaft in a non-twisting and sealing manner and including a ring flange extending radially outward so as to provide a second sealing surface for axially mating the first sealing surface, wherein the ring flange includes a radial extension having an outer portion;
- and
- a sensor disposed at the housing wall and one of a transmitter wheel and a multipole wheel cooperating with the sensor to measure at least one of a rotational speed and shaft displacement.
An axial shaft seal disposed between a housing wall and a rotating shaft, the axial shaft seal comprising:
- an outer ring insertable into the housing wall in a stationary and sealing manner, the outer ring including a sleeve including a polymer material extending radially inward and having a spring bellows form, a radially inward end portion of the sleeve having a first sealing surface;
- an inner ring connectable to the shaft in a non-twisting and sealing manner and including a ring flange extending radially outward so as to provide a second sealing surface for axially mating the first sealing surface, wherein the inner ring includes a cylindrical part;
- and
- an auxiliary flange disposed on the housing wall, a sensor disposed on the auxiliary flange one of a transmitter wheel and a multipole wheel for cooperating with the sensor.
An axial shaft seal disposed between a housing wall and a rotating shaft, the axial shaft seal comprising:
- an outer ring insertable into the housing wall in a stationary and sealing manner, the outer ring including a sleeve including a polymer material extending radially inward and having a spring bellows form, a radially inward end portion of the sleeve having a first sealing surface;
- an inner ring connectable to the shaft in a non-twisting and sealing manner and including a ring flange extending radially outward so as to provide a second sealing surface for axially mating the first sealing surface, wherein the inner ring includes a cylindrical part that includes one of a transmitter wheel and a multipole wheel;
- and
- an auxiliary ring having a non-repellant washer mounted, the outer ring being mounted in the auxiliary ring.
Dependencies are inferred from the claim text.