An assembly is provided for a piece of rotational equipment. This assembly includes a stationary component, a rotating component, and a dry seal assembly. The dry seal assembly is configured to substantially seal an annular gap between the stationary component and the rotating component. The dry seal assembly includes a seal element and a seal land. The seal element is mounted to the stationary component and is configured to sealingly engage the seal land. The seal land is mounted to the rotating component and is configured to permit gas leakage across the dry seal assembly through a passageway in the seal land.

When the compressed air is not applied, an inclined surface, which is positioned at an upstream side with respect to the supply direction of the compressed air, of the lip part is in contact with the inclined surface of the inner ring. When the compressed air is applied, a contact area between the inclined surface, which is positioned at the upstream side with respect to the supply direction of the compressed air, of the lip part and the inclined surface of the inner ring becomes smaller, as compared to when the compressed air is not applied.

There is disclosed an assembly for a gas turbine engine that includes a bearing housing circumferentially extending around a central axis thereof and delimiting a bearing cavity for receiving a bearing therein. A controlled gap seal is secured to the bearing housing, the controlled gap seal including a ring and a runner, the runner rotatable relative to the ring about the central axis, the runner spaced apart from the ring by a gap. The gap defines a fluid passage between the bearing cavity and an environment outside the bearing cavity. At least one baffle is secured to a surface of the bearing housing oriented toward the bearing cavity. The at least one baffle is a fin protruding from the surface and extending into the bearing cavity. The at least one baffle disrupts a cylindricality of the surface. A method of operating the bearing assembly is also disclosed.

A boot with a body cavity that protects a moveable joint and retains lubricant associated with the joint is disclosed. The wall of the boot body includes a venting aperture that is protected by a surrounding barrier structure.

A rolling bearing is provided which includes an inner ring; an outer ring; rolling elements disposed in the bearing space; a cage rollably retaining the rolling elements; and a seal member made of a resin. The seal member includes a support frame, a plurality of window holes, and a filter closing the window holes. Lubricating oil flows through the bearing space to lubricate the interior of the rolling bearing. The cage is made of a magnetic material, and has a pulse ring integrally formed at an end of the cage. The rolling bearing further includes a magnetic rotation sensor mounted to the seal member so as to be capable of being opposed to any of recesses and protrusions of the pulse ring.

An assembly is provided for a piece of rotational equipment. This assembly includes a stationary component, a rotating component, and a dry seal assembly. The dry seal assembly is configured to substantially seal an annular gap between the stationary component and the rotating component. The dry seal assembly includes a seal element and a seal land. The seal element is mounted to the stationary component and is configured to sealingly engage the seal land. The seal land is mounted to the rotating component and is configured to permit gas leakage across the dry seal assembly through a passageway in the seal land.

In order to effect a seal a porous material which comprises one side of two opposing surfaces is used to restrict and evenly distribute externally pressurized gas, liquid, steam, etc. between the two surfaces, exerting a force which is opposite the forces from pressure differences or springs trying to close the two faces together and so may create a non-contact seal that is more stable and reliable than hydrodynamic seals currently in use. A non-contact bearing is also disclosed having opposing surfaces with relative motion and one surface issuing higher than ambient pressure through a porous restriction, wherein the porous restriction is part of a monolithic porous body, or a porous layer, attached to lands containing a labyrinth, the porous restriction and lands configured to not distort more than 10% of a gap created from differential pressure between each side of the porous restriction.

A drive wheel end includes a hub assembly, an axle, an axle shaft passing through an interior of the axle and rigidly coupled to the hub assembly outside the interior, a bearing system including (i) at least one bearing between the hub assembly and the axle and (ii) a bearing seal between the at least one bearing and an air side of the bearing system, and a filter spanning gap between the axle and at least one of the hub assembly and the axle shaft externally to the axle, to filter flow between the bearing system and the interior. The filter may include a frame and a flexible lip. The frame forms a central aperture and at least one opening radially outwards from the central aperture, and includes a size-discriminating material covering each opening. The flexible lip extends radially inwards from the frame.

A sealing device for a bearing unit having an axis of rotation and providing; a static component placed on a non-rotatable outer ring having a reinforcement support that abuts the outer ring and elastomeric material disposed on the reinforcement support, the elastomeric material forming first and second lips; a rigid shield configured for placement on one of a rotatable hub and a rotatable inner ring; the first and second lips have an equilibrium position where they do not contact the metallic shield; the elastomeric material forming a third lip that contacts the rigid shield to form an internal volume of the sealing device, the second lip and the rigid shield define a labyrinth seal in communication with the internal volume; the second lip, does not extend a full three hundred sixty degrees around the axis of rotation. This creates a channel for drainage of contaminants from the internal volume.

A sealing arrangement comprising a carrier element connecting to a first bearing part, wherein the carrier element further includes an elastic element that includes a sealing lip, and a cavity between the first bearing part and a second bearing part, wherein the cavity is delimited by the carrier element, wherein the carrier element includes at least one aperture at a radial level of the cavity and the at least one aperture is sealed by a diaphragm connected to the carrier element, wherein at least one protective lip is provided on an opposite side of the diaphragm, and wherein the at least one protective lip is formed at the elastic element.