A wheel hub assembly assembly having a central axis (X) and covers therefore. An outer ring provided with a tubular mounting portion, and a cover having a keying portion which is inserted inside the tubular mounting portion. The cover is made of plastic material, the keying portion comprises an annular seat made of plastic and a sealing element made of rubbery elastic material. The sealing element is defined by a solid of rotation mounted inside the annular seat over a whole of an axial length of the annular seat so as to project radially outside of the annular seat to make contact with the tubular mounting portion of the outer ring thereby sealingly closing the wheel hub assembly.

The purpose of the present invention is to provide a slide component that can exhibit sealing performance and lubricity regardless of rotating direction. A pair of slide components 4, 7 that slide relative to each other have sliding faces S that slide relative to each other, and a sealed fluid-side periphery 16 and a leakage-side periphery 15. The sliding face S of at least one slide component 4 of the pair of slide components 4, 7 includes: a fluid introduction groove 13 in communication with the sealed fluid-side periphery 16; a first pressure generation mechanism 12 of which one end is in communication with the fluid introduction groove 13 and the other end is surrounded by a land portion R1; and a second pressure generation mechanism 11 of which one end is in communication with the leakage-side periphery 15 and the other end is surrounded by an annular land portion R2. The fluid introduction groove 13 and the other end 12e of the first pressure generation mechanism 12 include overlapping portions Lp overlapping circumferentially.

Provided is a seal arrangement for sealing an internal space between two components mounted for rotation relative to each other, in particular for sealing a wheel bearing. The seal arrangement comprises a first carrier element, which can be connected to the first component, and a second carrier element, which can be connected to the second component. A sealing element is formed on at least one of the carrier elements and rests against the respective other carrier element at least one contact point. It is provided that at least one opening is made in the first carrier element, into which a ventilation element is inserted. It is provided that a receiving space is formed on the ventilation element, which is delimited in the radial direction by a collar on a base body of the ventilation element, wherein a gas-permeable membrane or a porous body is arranged in the receiving space.

A support assembly for movable, rotating or sliding shafts, having a bearing unit having an inner ring, an outer ring, and a row of rolling bodies interposed between the inner and outer rings, a casing, a cover for fluid sealing an opening of an internal seat of the casing, a rear sealing device on a side opposite the cover having a metal screen and a vulcanized rubber liner equipped with an axially outer first sealing lip and with an axially inner second sealing lip, an axially inner sealing device, having a first shield provided with a vulcanized rubber liner having a plurality of sealing lips, the outer ring having a step extending axially inward and provided with a second shield having a vulcanized rubber liner with a plurality of sealing lips.

Support assembly for movable, rotating or sliding shafts, having a bearing unit adapted to receive the movable shaft, a casing and a cover for fluid sealing an opening of an internal seat of the casing; the bearing unit having a radially outer ring, a radially inner ring and a row of rolling elements between the radially outer ring and the radially inner ring; the support assembly also being provided with: a rear sealing device, placed on the opposite side with respect to the cover, and comprising a metal shield and a vulcanized rubber liner equipped with a first, axially outer, sealing lip and with a second, axially inner, sealing lip the support assembly being characterized in that the rear sealing device comprises a further third sealing lip slidingly contacting the radially inner ring.

Systems and methods include providing an aircraft with a fuselage and a wing assembly rotatable relative to the fuselage about a stow axis between a flight position and a stowed position. The aircraft includes an engine reduction gearbox having a retractable driveshaft that selectively engages the mid-wing gearbox via axially translatable motion along a rotation axis when the wing assembly is in the flight position. The mid-wing gearbox includes a plunger seal that is displaced in response to contact with the retractable driveshaft. Displacement of the plunger seal allows lubricant to flow through an inner bore in the retractable driveshaft, across splines of the retractable driveshaft and the mid-wing gearbox, and through lubrication ports in the mid-wing gearbox to lubricate the engine reduction gearbox, splines of the retractable driveshaft and the mid-wing gearbox, and the mid-wing gearbox via a single lubrication system.

A bearing cover assembly can be assembled to a bearing housing in which a rolling element bearing is accommodated. The bearing housing assembly includes an annular adapter and an end cap that can be mated together. The annular adapter can have a tapered inner annular surface and can be inserted into the housing bore of the bearing housing. The end cap can have a corresponding outer tapered surface. When the end cap is inserted into the adapter hole defined by the annular adapter, the sliding contact between the tapered inner annular surface and the outer surface radially expands the annular adapter inside the housing bore creating a positive engagement retaining the bearing cover assembly to the bearing housing.

A steering system for a vehicle includes a transmission cover on a steering gear housing. The cover is arranged adjacent to a bearing part. The side surface of the bearing part facing the transmission cover forms a support surface for the transmission cover.

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 bearing isolator seal having a shut off O-ring is tolerant of axial rotor-stator misalignment and provides an enhanced static seal while minimizing rotational wear. A tapered section of the stator is overlapped by the shut off O-ring. When the rotor is static there is no axial misalignment, and the shut off O-ring is pressed against the tapered section, forming an enhanced seal. During rotor rotation, increased axial misalignment moves the O-ring away from the tapered section, reducing rotational wear. The stator can extend horizontally beyond the tapered section and below the O-ring, so that if the rotor moves beyond a maximum misalignment, there is a “line on line” fit between the stator and rotor. The bearing isolator seal can include labyrinth technology, and the tapered section can include a contour that allows the shutoff O-ring to drag along the surface of the tapered section with no hang-ups or binding.