An oil-lubricated bearing device comprises: a rolling bearing including an inner ring, an outer ring, rolling bodies, and a holder; a tapered member; a lubricant storage disposed on a side provided with the tapered member with respect to the inner ring; and a contact portion. The holder includes pockets each formed with outer and inner ring side openings and configured to hold a corresponding one of the rolling bodies, a lubricant scraping portion formed at an inner peripheral surface of each of the pockets and configured to scrape lubricant adhering to a surface of each of the rolling body, and a second inclined surface formed at an outer peripheral surface portion of the holder adjacent to the outer ring side opening and rising with a slope toward the lubricant storage.

A vertically mounted and magnetically driven power generation apparatus has multiple shelves vertically arranged and spaced apart. Each shelf has a through hole tapering downwards. A spindle is mounted through the multiple through holes. A motor driving the spindle and a primary power generator driven by the spindle and located below the motor are mounted around the spindle. Because of the weight of the primary power generator, adding additional weight is not need. A magnetic driven member is mounted around the spindle and located within a corresponding through hole. Multiple magnetic drive assemblies are mounted on inner walls of the multiple through holes. Each magnetic driven member is subject to forces of magnetic repulsion caused by first and second magnetic drive members of a corresponding magnetic drive assembly for the spindle to be rotated under a friction-free condition to enhance torque and rotation speed of the spindle.

A flywheel apparatus that magnetically unloads a top rotor bearing is described. The apparatus includes a flywheel housing, a rotor with a vertical axis of rotation that includes a magnetic material, a magnet configured to apply a desired upward off-loading force along the vertical axis of rotation, an upper bearing connected to an upper shaft of the rotor, and a bearing housing disposed between the upper bearing and the flywheel housing that substantially prevents downward axial motion of the upper bearing. The magnet includes an electromagnet. A force sensor is used to measure a force on the upper bearing which is provided as input to a controller that updates the current to the electromagnet. The rotor is maintained in a fixed axial position and a spring disposed below a lower bearing absorbs axial dimension growth of the rotor.

A hybrid bearing assembly is provided and includes stationary components, a shaft disposed to rotate relative to the stationary components, passive magnetic bearing components integrated into the shaft and the stationary components to generate passive magnetic force to resist radial movement of the shaft relative to the stationary components and an active damping system. The active damping system includes a stationary coil, a magnetic element rotatable with the shaft to induce current in the stationary coil and a circuit electrically coupled with the stationary coil. The circuit is configured to determine from the current an attitude change of the shaft and the magnetic element and to apply damping current to the stationary coil to resist the attitude change.

An electromechanical battery can include a rotary member made at least in part of a first material composition. The rotary member having an interior surface defining an internal core cavity and at least one central chamber. A plurality of permanent magnets supported by the interior surface of the core cavity. A core member can be disposed within the core cavity. At least one levitating magnet can be supported by an exterior surface of the core member. The rotary member levitated with respect to the core member by the permanent magnets and levitating magnet. A second material composition can reside within at least one of the rotary member and the core member. The first member material composition converts through chemical reaction when exposed to the second material composition into a third material composition. The third material composition characterized by energy absorption resisting continued rotation of the rotary member.

An oil-lubricated bearing device comprises: a rolling bearing including an inner ring, an outer ring, rolling bodies, and a holder; a tapered member; a lubricant storage disposed on a side provided with the tapered member with respect to the inner ring; and a contact portion. The holder includes pockets each formed with outer and inner ring side openings and configured to hold a corresponding one of the rolling bodies, a lubricant scraping portion formed at an inner peripheral surface of each of the pockets and configured to scrape lubricant adhering to a surface of each of the rolling body, and a second inclined surface formed at an outer peripheral surface portion of the holder adjacent to the outer ring side opening and rising with a slope toward the lubricant storage.

The device for pivoting an arbor of a rotating member, on a determined pivot axis, inside a timepiece movement includes at least one magnetic bearing including a magnet which exerts a force of attraction on a pivot made of magnetic material, of the arbor, and an endstone arranged between the magnet and the pivot, the endstone being formed of a material having a hardness greater than 500 HV and a friction coefficient less than or substantially equal to 0.1 with the material of which the pivot is made. The material forming the endstone has a high magnetic permeability and the endstone has, in cross-section to the pivot axis, smaller dimensions than those of the magnet, said endstone being arranged in the timepiece movement to be centred on the determined pivot axis.

A centrifugal blood pump for circulating blood is provided, wherein an impeller makes no contact at all with a housing and a rotating shaft and moves in a rotating manner with the impeller in a stably levitating state. Also provided is a blood pump in which the impeller rotates at high speed even when the blood pump is reduced in scale. The blood pump contains a magnet of enhanced magnetic force at the inside of a housing and at an outer peripheral surface of an impeller and providing a fixed-interval spacing on the periphery of a bearing section makes it possible to ensure a state where no contact at all is made between the housing, a shaft, and the impeller, and makes it possible to cause the impeller to rotate stably over a long period of time.

The invention provides a way re-center a rotor's central longitudinal rotational axis with a desired system longitudinal axis. A pair of planar semicircular permanent magnets are pieced together to form a circle. The flux from each magnet is pointed in in opposite directions that are both parallel with the rotational axis. A stationary shorted circular winding the plane of which is perpendicular to the system longitudinal axis and the center of curvature of the circular winding is positioned on the system longitudinal axis. Upon rotation of the rotor, when a transverse displacement of the rotational axis occurs relative to the system longitudinal axis, the winding will experience a time-varying magnetic flux such that an alternating current that is proportional to the displacement will flow in the winding. Such time-varying magnetic flux will provide a force that will bring the rotor back to its centered position about the desired axis.

The invention relates to an easily mountable and highly dynamic radial bearing. According to the invention, a magnetic radial bearing for the rotatable mounting of a rotor (3) is provided, having a stator (2) that comprises several coil assemblies (6). The coil assemblies (6) are arranged around an axis (1) of the radial bearing in a circumferential direction. Each of the coil assemblies (6) has a laminated core (7) having single sheets. Each of the coil assemblies (6) further has an axial field coil (11) that is wound around the corresponding laminated core (7). The single sheets are stacked in the tangential direction in every laminated core (7).