A self-supplied device for a logistic/diagnostic monitoring for cargo type railway vehicles, adapted to be applied to an axle of a vehicle, rotating during the vehicle travel; the device comprises an autonomous electric generator to generate electric power from the rotation of the axle composed of a Winding fixed With respect to the rotation of the axle and composed of a turn of electrically conducting material, and a rotary magnet fastened to the axle to be rotated by the axle the Winding generating an electric voltage When it is placed at the interface With the rotary magnet.

A rolling element bearing having a first ring element, a second ring element (3), a plurality of rolling elements arranged in a space between the first and the second ring elements such that the first and the second ring elements can rotate relative each other around a rotational axle. The bearing further includes a sealing ring for sealing off a circumferential opening of the space between the first and the second ring element. The sealing ring is connected to the first ring element and further arranged to rotate relative the second ring element of the rolling element bearing. The sealing ring provides a power generating system that provides at least one pick-up element arranged to generate electrical power when the rolling element bearing rotates. The power generating system is located completely within the circumferential opening of the space.

The invention relates to a rolling element bearing comprising a first bearing ring, a second bearing ring, and a claw-pole alternator that is arranged between said two bearing rings. The claw-pole alternator includes a sequence of magnetic poles running along the first bearing ring, a sequence of magnetically-conductive claws arranged along the circumference of the second bearing ring, and a coil. Together the claws and the poles form magnetic rings that surround said coil. It is essential to the invention that the magnetically-conductive claws are only arranged along some sections of the circumference of said second bearing ring. The coil is arranged in the region of said magnetically-conductive claws. The invention also relates to a claw-pole alternator for installing in a rolling element bearing.

There is provided a wireless sensor-equipped bearing. A plurality of magnets are fixed between pockets of a retainer formed of an annular body such that an N pole and an S pole of the magnets neighbor in a circumferential direction of the annular body. A coil, a circuit unit and an antenna are fixed to a surface of a first seal, the surface being opposed to the magnets. A sensor is disposed on any one of an inner ring, an outer ring and the first seal.

A fluid dynamic pressure bearing includes a conical bearing member having a conical bearing surface forming a first gap between a member constituting the rotor. A second gap connected to one end of the first gap and provided over the entire periphery of the shaft is formed between the conical bearing member and the shaft. A tapered seal portion is formed between the conical bearing member and the rotor. The conical bearing member is provided with a circulation hole that communicates the second gap and the tapered seal portion. The circulation hole communicates to another end of the first gap through a part of the tapered seal portion, so that the circulation hole and the other end of the first gap are spaced apart.

A vehicle wheel supporting rolling bearing unit includes a stationary side bearing ring member, a rotation side bearing ring member, and plural rolling elements. The rotation side bearing ring member is provided with a first acceleration sensor, a second acceleration sensor, and a third acceleration sensor which are fixed on a virtual plane orthogonal to a center axis of the rotation side bearing ring member. The first acceleration sensor and the second acceleration sensor are arranged on a virtual line passing through a rotation center of the rotation side bearing ring member with a same distance from the rotation center while detection directions thereof are directed in a radial direction and are opposite to each other in the radial direction. The third acceleration sensor is arranged such that a detection direction thereof is non-parallel to the detection directions of the first acceleration sensor and the second acceleration sensor.

A resolver integrated-type bearing device includes a bearing configured to rotatably support a rotating shaft with respect to a housing, a rotor attached to the rotating shaft, and a stator disposed radially outward of the rotor with a gap therebetween. A stator core of the stator is integrally attached to the bearing.

An auxiliary power unit equipped wheel support bearing assembly is provided which includes a wheel support bearing assembly and an auxiliary power unit. The auxiliary power unit is of a direct drive design that includes a stator mounted to a stationary ring of the wheel support bearing assembly and a motor rotor mounted to a rotational ring of the wheel support bearing assembly. An entirety of the auxiliary power unit is sized to extend less than an outer peripheral segment of a brake rotor, with the outer peripheral segment defining an area against which a brake caliper is intended to be pushed. The auxiliary power unit is, with respect to an axial direction, sized to be situated between a hub flange of the wheel support bearing assembly and a mounting face of the wheel support bearing assembly for mounting to a vehicle body of a vehicle.

A sealed bearing module for a tidal turbine, the tidal turbine including a hub and at least one rotor blade, the sealed bearing module including an inner ring, and an outer ring, and a seal system configured to seal the bearing module. The outer ring includes axially extending bores configured to receive fasteners for attaching the outer ring directly to the hub, and the inner ring includes axially extending bores for attaching the inner ring directly or indirectly to the rotor blade.

A method and a device for protecting an electric motor in a pod unit for propulsion of marine vessels against shaft bending shocks when the blades of the pod propeller hit ice blocks or other hard objects, said motor having a drive shaft, a rotor and a stator, said shocks tending to momentarily bend the drive shaft (3) to such an extent that the rotor (41) will come into contact with the stator. The rotor is prevented from coming in detrimental contact with the stator by providing at least two members, which together form a radial plain bearing having mating arcuate bearing surfaces, which during normal operation of the motor are spaced from one another by a gap and come in contact with one another only at extreme loads with short durations.