A device for stirring a liquid or a granular material comprising a stirring agitator, a rotating drive shaft for rotating the stirring agitator, a rotating drive shaft for rotating the stirring agitator, a stationary axle extending in an essentially vertical direction about which the stirring agitator is adapted to rotate, and a transfer arrangement for contactless transfer of rotation of the drive shaft to the stirring agitator. The device has a center axis around which the stirring agitator and the drive shaft are adapted to rotate, and means for generating a magnetic force exerting an upwardly directed force component on the stirring agitator. The means for generating a magnetic force comprises a first element arranged in a stirring agitator and a second element associated with the stationary axle. At least one of the first element and the second element comprises a permanent magnet. At least one of the first element and the second element is arranged such that the center axis extends through the first element and/or the second element.

An arrangement for a lithography apparatus has a component and a weight compensating device to compensate for a weight of the component. The weight compensating device includes a first magnetic device and a second magnetic device. The first magnetic device is designed to exert a first magnetic force on the component. The first magnetic force exceeds the weight of the component. The first magnetic force acts counter to the weight of the component. The second magnetic device is designed to exert a second magnetic force on the component. The second magnetic force acts in the direction of the weight of the component. The first magnetic force corresponds to the sum of the second magnetic force and the weight. The second magnetic device is designed to reduce the second magnetic force at the same time and by the same absolute value as the first magnetic force.

A magnetic levitation power device is revealed. The magnetic levitation power device includes at least two sets of power devices, a motor, and a power generator. The magnetic levitation power device features on the power devices each of which consists of a first seat, a second seat and a transmission set. A first sleeve is set on the first seat and a second sleeve is arranged at the second seat. The transmission set is composed of a shaft, a large gear and a small gear. Each of two ends of the shaft are disposed with two magnetic bodies respectively and are mounted in a sleeve. The magnetic bodies are arranged with like poles repel each other so that the transmission set is suspended and friction coefficient of the shaft is reduced. Therefore high speed transmission is achieved by low power to get high power.

A hybrid airfoil thrust bearing is provided for a shaft including a thrust disc that rotates with the shaft. The hybrid airfoil thrust bearing includes airfoil bearing components and passive magnetic bearing components. The hybrid airfoil bearing components include a first top foil immediately adjacent to a first side of the thrust disc and surrounding the shaft, first additional components, a second top foil immediately adjacent to a second side of the thrust disc and surrounding the shaft and second additional components. The passive magnetic bearing components are integrated into the thrust disc and into the first and second additional components to remove a static load of the thrust disc on the first top foil and on the second top foil.

A compressor assembly is provided and includes a fluid pathway, a compressor disposed and configured to compress fluid flowing along the fluid pathway and a motor configured to drive operations of the compressor. The motor includes one or more hybrid airfoil bearings to support the shaft within a housing. Each of the one or more hybrid airfoil bearings includes airfoil bearing components including a top foil immediately surrounding the shaft and additional components and passive magnetic bearing components integrated into the shaft and the additional components of the airfoil bearing components to remove a static load of the shaft on the top foil.

Structural design permits efficiency to increase, which allows for the levitation of power generation equipment in a power plant. Rotational gyroscopic levitation motion is achieved by spinning stabilization without physical bearings on a generator. The phenomena of magnetic levitation of a rotational moving part with a degree of vertical allowance permit the torque resistance to lessen allowing for the reduction in heat rate to kilowatt-hour ratio. The magnetic levitation is further enhance by containing the magnetic bearings in a cooled chamber.

A hybrid airfoil bearing for a shaft is provided and includes airfoil bearing components and passive magnetic bearing components. The airfoil bearing components include a top foil immediately surrounding the shaft and additional components. The passive magnetic bearing components are integrated into the shaft and the additional components of the airfoil bearing components to remove a static load of the shaft on the top foil.

A flywheel system including a rotor forming an aperture extending through a rotation axis of the rotor and a fixture including a shaft assembly for passing through the aperture of the rotor, wherein the rotor rotates about the shaft assembly. The shaft assembly includes a bottom support, a top support, a central rod connecting the bottom support to the top support, a plurality of stacked modules, each module forming an aperture for receiving the central rod, a top pre-tensioning nut affixed to a top end of the central rod, and a bottom pretensioning nut affixed to a bottom end of the central rod. The top pre-tensioning nut and the bottom pre-tensioning nut clamp the plurality of stacked modules between the bottom support and the top support.