A turbine generator contains a turbine part and a generator part. The turbine contains a turbine wheel. A sealing arrangement is arranged between the turbine wheel and the generator part, the sealing effect of which varies during operation. The generator part further has a generator shaft, which is supported by an axial bearing configured as a magnetic bearing with two coils axially spaced apart from each other. A bearing ring is arranged between these coils with an axial distance from the coils. To ensure a safe operation, a setpoint value for the axial distance is varied to change the sealing effect of the sealing arrangement. Alternatively or additionally, it is provided that when a current threshold of a coil current is exceeded, a control signal is emitted to control the flow of the medium or the rotational speed.

Apparatuses, systems and methods are described for a flywheel system incorporating a rotor made from a high-strength material in an open-core flywheel architecture with a high-temperature superconductive (HTS) bearing technology to achieve the desired high energy density in the flywheel energy storage devices, to obtain superior results and performance, and that eliminates the material growth-matching problem and obviates radial growth and bending mode issues that otherwise occur at various high frequencies and speeds.

A turbine generator contains a turbine part and a generator part. The turbine contains a turbine wheel. A sealing arrangement is arranged between the turbine wheel and the generator part, the sealing effect of which varies during operation. The generator part further has a generator shaft, which is supported by an axial bearing configured as a magnetic bearing with two coils axially spaced apart from each other. A bearing ring is arranged between these coils with an axial distance from the coils. To ensure a safe operation, a setpoint value for the axial distance is varied to change the sealing effect of the sealing arrangement. Alternatively or additionally, it is provided that when a current threshold of a coil current is exceeded, a control signal is emitted to control the flow of the medium or the rotational speed.

Novel configurations of levitating passive magnetic bearing configurations are described. Such configurations can be used for the precise control of the magnitude and sign of the bearing stiffness, thereby facilitating the overall design of the system in ways that are not possible with conventional attractive or repelling bearing elements.

Apparatuses, systems and methods are described for a flywheel system incorporating a rotor made from a high-strength material in an open-core flywheel architecture with a high-temperature superconductive (HTS) bearing technology to achieve the desired high energy density in the flywheel energy storage devices, to obtain superior results and performance, and that eliminates the material growth-matching problem and obviates radial growth and bending mode issues that otherwise occur at various high frequencies and speeds.

A magnetic levitation bearing assembly, including: a magnetic levitation bearing, a shell, and a working clearance adjusting device; the magnetic levitation bearing includes a first iron core, a second iron core and a thrust disk; the working clearance adjusting device is arranged between a radial inner periphery of the shell and the thrust disk along the radial direction, and between the shell and the second iron core along the axial direction; an axial end of the working clearance adjusting device is abutted against the second iron core, a void gap is provided between the shell and the second iron core, an adjustment on the magnetic levitation bearing working clearance is made possible by altering the length between two axial ends of the working clearance adjusting device, such that the working clearance is consistent with a design value.

A pump may include a stator, a rotor, and an impeller. The stator may include one or more electromagnets and one or more permanent magnets. The rotor may include an armature, one or more complementary permanent magnets, and a pull magnet configured to position the rotor in an axial direction. The rotor may be disposed within the stator. The complementary permanent magnets and the one or more permanent magnets of the stator may create magnetic bearings. The armature may be aligned with at least one of the electromagnets of the stator and configured to rotate the rotor with respect to the stator. The impeller may be coupled to the rotor.

A weight compensating device includes a stator and a translator. The translator is movable relative to the stator along a movement axis. The translator includes a first permanent magnet arrangement with an axial magnetization. The stator includes a second permanent magnet arrangement that radially surrounds the first permanent magnet arrangement. The stator includes a third permanent magnet arrangement that is arranged coaxially below the first permanent magnet arrangement and that has an axial magnetization that is aligned in inverse fashion with respect to the axial magnetization of the first permanent magnet arrangement. The stator includes a magnetic body arrangement that is arranged coaxially above the first permanent magnet arrangement. The first permanent magnet arrangement, the second permanent magnet arrangement, the third permanent magnet arrangement and the magnetic body arrangement form a magnetic unit and, in interaction with one another, form a compensating force that counteracts the weight acting on the translator.

A magnetic bearing includes a ring-shaped first magnet, a ring-shaped second magnet, a first magnetic body and a second magnetic body. The ring-shaped first magnet is magnetized in an axial direction. The ring-shaped second magnet is concentrically arranged with the first magnet and is magnetized in the axial direction. The first magnetic body is provided on a first surface in the axial direction of the second magnet. The second magnetic body is provided on a second surface parallel to the first surface in the axial direction of the second magnet. A thickness of each of the first magnetic body and the second magnetic body is less than or equal to an acceptable fluctuation amount in the axial direction of the second magnet with respect to the first magnet and greater than or equal to 0.1 mm.

Novel configurations of levitating passive magnetic bearing configurations are described. Such configurations can be used for the precise control of the magnitude and sign of the bearing stiffness, thereby facilitating the overall design of the system in ways that are not possible with conventional attractive or repelling bearing elements.