A lubrication system for a pitch bearing of a wind turbine includes a lubricant for lubricating contact surfaces between an outer race, an inner race, and a plurality of rolling elements of the pitch bearing. Further, the lubrication system includes a lubricant inlet formed into a first side of the inner race and an inlet seal for sealing the lubricant inlet so as to prevent the lubricant from leaking from the lubricant inlet. Moreover, the lubrication system includes a lubricant outlet formed into an opposing, second side of the inner race and a lubricant collection container arranged adjacent to and in fluid communication with the lubricant outlet and mounted to the inner race. Thus, during operation of the wind turbine, at least one of a slope of the pitch bearing, gravity, and a centrifugal effect cause the lubricant to flow throughout the pitch bearing to lubricate the contact surfaces without exiting a closed volume defined by the inlet seal(s) and the lubricant collection container(s).

A bearing seal is suitable for sealing a space between a first rotating body and a second rotating body of a bearing. The first radial end of the bearing seal is arranged on the first rotating body and forms a contact seal with the first rotating body, the second radial end of the bearing seal is arranged close to the second rotating body and forms a non-contact seal with respect to the second rotating body. A plurality of lubricant storage cavities arranged on the inner surface of the bearing seal facing the rolling elements of the bearing. A bearing providing the bearing seal as described above.

A seal assembly (10, 110) has an inner seal carrier (14, 114) with seals (16, 116, 18, 118), an outer carrier (30, 130) with inner curved surface (144) matching an outer curved surface (146) of the inner seal carrier for angular pitch adjustment of 3° to 5° for the inner seal carrier within the outer carrier, a flexible seal (36, 136) between the outer carrier and the bearing housing (28, 128), and oil within a cavity (20, 120) between the seals, preferably above atmospheric pressure. Shoulder bolts (140) allow lateral movement of the seal assembly with respect to the bearing housing. The seal assembly allows for misalignment and lack of parallelism of the shaft relative to the bearing housing whilst preventing contamination of the bearing.

A lubricant supply device includes a porous body including a first porous portion and a second porous portion in contact with the first porous portion, the porous body being impregnated with a lubricant. A penetration depth of the lubricant in the second porous portion is larger than a penetration depth of the lubricant in the first porous portion.

A seal assembly (10, 110) has an inner seal carrier (14, 114) with seals (16, 116, 18, 118), an outer carrier (30, 130) with inner curved surface (144) matching an outer curved surface (146) of the inner seal carrier for angular pitch adjustment of 3° to 5° for the inner seal carrier within the outer carrier, a flexible seal (36, 136) between the outer carrier and the bearing housing (28, 128), and oil within a cavity (20, 120) between the seals, preferably above atmospheric pressure. Shoulder bolts (140) allow lateral movement of the seal assembly with respect to the bearing housing. The seal assembly allows for misalignment and lack of parallelism of the shaft relative to the bearing housing whilst preventing contamination of the bearing.

A lubricant supply device includes a porous body including a first porous portion and a second porous portion in contact with the first porous portion, the porous body being impregnated with a lubricant. A penetration depth of the lubricant in the second porous portion is larger than a penetration depth of the lubricant in the first porous portion.

A rolling-element bearing unit for use in a motor vehicle wheel or in a motorbike rocker arm includes outer and inner raceway elements and a set of rolling elements between the inner and outer raceway elements such that the inner and outer raceway elements are pivotable or rotatable relative to each other and also a lubricant reservoir body in the bearing interior for storing and dispensing a lubricant, the body including bridge elements extending between adjacent pairs of the rolling elements and a side ring connecting the bridge elements.

A rolling-element bearing unit for use in a motor vehicle wheel or in a motorbike rocker arm includes outer and inner raceway elements and a set of rolling elements between the inner and outer raceway elements such that the inner and outer raceway elements are pivotable or rotatable relative to each other and also a lubricant reservoir body in the bearing interior for storing and dispensing a lubricant, the body including bridge elements extending between adjacent pairs of the rolling elements and a side ring connecting the bridge elements.

A tapered roller bearing includes an inner ring including, on its outer circumferential surface, an inner raceway surface and including, on an end portion on a second axial side, a cone back face rib portion protruding radially outward, an outer ring including, on its inner circumferential surface, an outer raceway surface, a plurality of tapered rollers disposed between the inner ring and the outer ring, and an annular cage that retains the plurality of tapered rollers spaced from each other in a circumferential direction. The cage includes a small-diameter annular portion, a large-diameter annular portion located on the second axial side relative to the tapered rollers and the outer ring, and a plurality of cage bar portions. The large-diameter annular portion has an oil pocket having a first aperture that is open radially inward and a second aperture that is open toward the outer raceway surface.

A tapered roller bearing includes an outer ring having a first raceway surface, an inner ring having a second raceway surface, plural tapered rollers disposed between the first and second raceway surfaces, and a lubricating oil holding member fixed to an end portion of the outer ring. The lubricating oil holding member includes a tubular portion, an annular portion, and a projecting portion. The tubular portion is formed in the shape of a cylinder, and fixed to an end portion of the outer ring. The annular portion is formed in the shape of a circular ring. An end portion of the annular portion on the outer side is connected to an end portion of the tubular portion on one side. The projecting portion projects radially inward from the inner peripheral surface of the annular portion in the radial direction.