A rolling bearing provides a first ring and a second ring capable of rotating concentrically relative to one another, at least one row of radial rolling elements radially interposed between raceways of the rings, and at least one row of axial rolling elements axially interposed between raceways of the rings. The rolling bearing further provides, axially on each side, at least one row of rolling elements radially interposed between raceways of the first and second rings.

A pitch bearing for coupling a rotor blade to a hub of a wind turbine includes an outer race mountable to the hub and an inner race rotatable relative to the outer race and mountable to the rotor blade. The inner race is formed by first and second ring components, each of the first and second ring components having an outer annular face and an inner annular face. The first and second ring components are joined together at the inner annular faces such that the inner annular faces are opposed and opposite each other. A layer of friction enhancing material is inserted/disposed between the opposed inner annular faces, the friction enhancing material including an abrasive particulate component that increases a coefficient of friction to minimize slippage between the first and second ring components.

A slewing bearing providing a first ring, a second ring, the rings being concentric around a central axis (X1), at least one row of rolling elements arranged between the rings in order to form an axial thrust that can transmit axial forces, at least one row of rolling elements arranged between the rings in order to form a radial thrust that can transmit radial forces, and at least one sealing assembly arranged between the first ring and the second ring. The sealing assembly provides first sealing means being arranged outside second sealing means, an annular sealed chamber being defined between the first sealing means and second sealing means.

The invention relates to a drill drive for a drilling rig with a motor, by which a drive shaft is rotationally driven which is supported in a rotatable manner in a housing with a bearing arrangement having at least a radial bearing, a first axial bearing and a second axial bearing, wherein on the first axial bearing a first force measuring device is arranged for determining a first axial force on the first axial bearing and on the second axial bearing a second force measuring device is arranged for determining a second axial force on the second axial bearing.

Furthermore, the invention relates to a drilling rig, in particular for oil or gas drilling, with a drill mast, along which a drill string with a drilling tool is arranged, wherein on the drill mast a drill drive according to the invention is supported in a displaceable manner for rotationally driving the drill string.

The invention relates to a slewing bearing that includes an inner ring, an outer ring, at least one row of rolling elements arranged between the rings in order to form an axial thrust that transmits axial forces, and at least one row of rolling elements arranged between the rings in order to form a radial thrust which can transmit radial forces. The slewing bearing further includes a sensing probe for detecting a relative displacement between the inner ring and outer ring and/or cracks, the inner ring having a through hole in which the sensing probe arranged. The through hole has a probe positioning element provided with a positioning portion and a support portion on which the sensing probe is supported so as to face the outer ring.

The invention relates to a sealing assembly for a rolling bearing having two mutually concentric rings spaced apart from each other by a fully circumferential gap in which one or more rows of revolving rolling elements are disposed, such that the two rings are rotatable relative to each other about their common axis, wherein the gap is sealed in the region of at least one of its two mouths, and wherein provided in the region of a gap seal are at least two seal rings, each having at least one sealing lip and an anchoring region on a surface region of the particular seal ring that faces away from the sealing lip, the seal rings being fixed to the same rolling bearing ring, whereas their respective sealing lips bear against the other rolling bearing ring, specifically against surface regions having identical or similar cross section.

The invention relates to a drive mechanism (1) for rotatably coupling a first system part or machine part, preferably an assembly (A), to a base, pedestal or frame or to another system part or machine part, for example for rotary positioning during the processing of large workpieces or during the moving of loads, which drive mechanism comprises two ring-shaped connecting elements (3, 4) each having at least one planar connecting surface (5, 6) and fastening means (7, 8) that are arranged distributed in a crown shape therein and effect connection to different system parts or machine parts or the like, said two connecting elements (3, 4) being arranged concentrically with each other and radially one inside the other with a gap-shaped interspace (9) in which are disposed one or more rows of rolling elements (14, 15, 16), each row whereof rolls between two respective raceways (17, 18) on the two connecting elements (3, 4), thus enabling same to rotate relative to each other, at least one connecting surface (5, 6) and at least one raceway (17, 18) being formed by machining or shaping a common base body. The invention is characterized in that at least one fully circumferentially extending row of magnets (40) is arranged inside the gap (9) on one connecting element (3, 4) and at least one fully circumferentially extending row of coils (38) is arranged directly opposite said magnets on the other connecting element (4, 3). According to the invention, at least one fully circumferentially extending row of magnets is arranged inside the gap on one connecting element and at least one fully circumferentially extending row of coils is arranged directly opposite said magnets on the other connecting element.

A rolling bearing, in particular a center-free large rolling bearing, having two concentric ball races with one ball race comprising a groove open toward the other ball race and the other ball race comprising a scraper ring engaging into the groove, wherein the scraper ring is supported at the groove in the axial direction of the rolling bearing by at least two axial bearings arranged at oppositely disposed scraper ring front sides and wherein the scraper ring is supported in the radial direction by at least one radial bearing which is arranged on a scraper ring jacket surface. The scraper ring is supported in the axial direction at the groove by a third axial bearing, wherein two axial bearings are arranged at the same side of the scraper ring at separate raceways offset from one another in the axial direction of the rolling bearing.

The invention is directed to a wind power plant having a rotor mounted rotatably about an axis directed approximately in the wind direction, and having at least two mutually concentric annular elements for connection to oppositely rotatable system components of the wind power plant, one of which comprises means for connection to the rotor of the wind power plant or to a drive shaft of a gearbox coupled thereto; at least one element having a freewheel characteristic is disposed between the two connection elements and together with them forms a freewheel, at least one connection element being provided with at least one integrated raceway for a row of rolling bodies rolling thereon.

A bearing having an inner ring, an outer ring, and at least one seal arranged between the rings. The bearing including a protective cover that delimits an annular space into which the seal extends and provides an outer annular portion and at least one inner portion disposed radially facing and at a distance from one another, and a connecting annular portion linking the outer annular portion and the inner portion; and at least one means for fixing the protective cover onto the inner ring, the fixing means passing through the outer and inner portions of the protective cover and cooperating with the inner ring.