Forschungszentrum Julich Gmbh

Kernforschungsanlage Julich Gesellschaft MIT Beschrankter Haftung

Siemens Aktiengesellschaft

Leybold Aktiengesellschaft

W. Schlafhorst Ag & Company

Kernforschungsanlage Julich

Rwd-datentechnik Gmbh

Berlin Heart Gmbh

Johan K Fremerey

Bernd Lindenau

Karl Koltze

Hans-Erhard Peters

Karl Boden

Heinrich Reiff

Stephan Polachowski

Rudolf Friedel

Albrecht Weller

Ernst Geldner

Peter Reimer

Jurgen Rabiger

Friedrich Gudden

Helmut Schneider

Matthias Lang

Klaus Witthauer

Johannes Müller

Gunther Appelt

George Comsa

Peter NÜSSER

The invention relates to a magnetic bearing element having at least one annular permanent magnet () that is surrounded by an annular binding band (), which element is characterized in that the permanent magnet () is divided at least one location () and spaced apart there.

Magnetic bearing element

The invention concerns a magnetic guiding device () having at least one element () to be guided magnetically in the axial direction, e.g. a shaft or an actuation member that is movable in the axial direction, the element () having a radial flange () made of magnetizable material that is enclosed by an axial yoke () made of ferromagnetic material and constituting a stator, forming magnet gaps () in which is producible, by means of a combination of permanent magnets and electromagnets (), an axial magnetic flux with which the axial position of the element () can be influenced, which is characterized in that in the axial yoke (), at least one pair of axially oppositely polarized permanent magnets () are arranged axially next to one another, and an electromagnetic coil () is moreover arranged radially adjacently as an electromagnet, the magnetic flux in the coil () being controllable in such a way that an asymmetrical magnetic flux having an axial resultant force is producible in the magnet gaps ().

Magnetic guiding device

Measuring apparatus

A tube pump in which the rotor is axially supported by permanent magnets at each end, so arranged as to apply attractive force across the gap between the rotor and a stator such that permanent magnets provide the sole radial support for the rotor. The axially effective permanent magnets are provided in conjunction with an electromagnetic stabilizer restoring the axial position of the rotor upon a shaft toward one or the other of the opposite ends thereof.

Pump with a magnetically supported rotor

The invention relates to a pot spinning device (,) having a spinning housing (,), a spinning centrifuge (,), which rotates at a high number of revolutions inside the spinning housing, as well as a rotatably seated centrifuge sheathing (,) arranged between the spinning housing and the spinning centrifuge, which is dragged along by the rotating spinning centrifuge (,) by means of air friction. In accordance with the invention, the spinning centrifuge (,) as well as the centrifuge sheathing (,) are seated in a contactless manner in magnetic bearings (,or respectively,).

Pot spinning device

Magnetic bearing

Device for breaking eddies at a surface submerged by a turbulent flow

Gas-friction vacuum indicator with a gas-friction sensor rotating about

Auxiliary bearing system for a rotor floating-mounted on a stator

Magnetic bearing cell

A magnetic bearing arrangement for a rotor, having permanent magnets to absorb radial bearing forces, and having an axial stabilizer which keeps the rotor in a contactless position in relation to the stator. Attached to the stator are electric coils, which interact with magnetizable parts fastened to the rotor. To make the bearing arrangement as independent as possible from the spatial orientation of the rotor axis, and from housing deformations, there is provided, in the vicinity of the rotor center of gravity, a center-of-gravity bearing having a comparatively high radial rigidity and at another point of the rotor there is provided a stabilizer bearing, having a radial rigidity which is less than that of the center-of-gravity bearing. The center-of-gravity bearing supports the major portion of the rotor weight, and the stabilizer bearing is primarily responsible for the static and dynamic stabilization of the entire system.

Axially stabilized magnetic bearing having a permanently magnetized

A movement detection system for use in measuring movements of a rotating body or shaft which is magnetized along an axis which is angularly displaced from the mechanical axis of rotation thereof. The system has a plurality of inductive coils which are connected to produce signals proportional to the movements of the body or shaft while suppressing spurious noise signals.

Coil system for inductive measurement of the velocity of movement of a

A magnetic bearing having contactless position stabilization of a supported body which includes a damping and aligning arrangement. This arrangement includes two spaced rotating annular permanent magnets which form a gap therebetween and which are attached to a rotor supported by the bearing. A stationary plate having good electrical conductivity and extending into the gap between the permanent magnets, is cut by their rotating magnetic flux. Mechanical disturbances of the rotor generate eddy-currents in the conductive plate which currents damp out these disturbances. A portion of the plate outside the gap is much thicker than the portion in the gap and provides a very low resistance path for the eddy-currents.

Magnetic bearing having triaxial position stabilization

A magnetic suspension system, especially for a rotor, comprises a stator having two axially spaced permanent magnets which are poled the same as a pair of spaced-apart permanent magnets on the rotor so that a repulsion field suspends the rotor within the stator. A magnetic coil surrounds the rotor and is disposed between the pole pieces of the stator substantially bridging the gap between them and the permanent magnets of the stator and the rotor repel each other in the axial direction. A contactless field sensor responds to the axial position of the rotor and controls the energization of the magnetic coil to stabilize the axial position of the rotor by augmenting or decreasing the net axial forces generated by the magnetic fields in the axial direction.

Magnetic suspension assembly for a rotor

A rotary measuring body for a gas-friction vacuum meter has its surface formed with a macroscopic roughness which provides a gas-friction coefficient minimally affected by the microscopic roughness of the surface. As a result, the output signal and sensitivity of the vacuum meter is high and is less susceptible to change as a result of surface corrosion.

Gas friction vacuum meter and method of making measuring body

Growing community of inventors

Bonn, Germany

Johan K Fremerey