Minebea Company, Limited

Mineba Co., Ltd.

Igor Ross

Martin Engesser

Stefan Schwamberger

Vladimir Vladimirovich Popov

Martin Bauer

Thilo Rehm

Andrey Pulnikov

The invention relates to a fluid dynamic bearing system that comprises at least one stationary part that has a shaft and two bearing plates disposed on the shaft at a mutual spacing, and at least one rotating part that is supported so as to rotate about a rotational axis with respect to the stationary part, and comprises a bearing bush and a sleeve enclosing the bearing bush. A bearing gap filled with bearing fluid is provided between the parts and at least one sealing gap for sealing the bearing gap that extends concentric to the rotational axis. The bearing comprises at least one fluid dynamic radial bearing and two fluid dynamic axial bearings and at least one recirculation channel that connects the two axial bearing regions to each other. According to the invention, the largest radial diameter of the recirculation channel is greater than or equal to the largest diameter of the sealing gap, and the smallest radial diameter of the recirculation channel is greater than or equal to the largest diameter of an adjacent bearing plate. Moreover, additional and effective deairing of the recirculation channel is effected by a venting device. To realize improved equilibrium of pressure in the bearing gap and improved retention of the bearing fluid, the sealing gaps can be inclined, at least in sections, at an angle &#x3b1;, &#x3b2; with respect to the rotational axis, wherein the angles may have different sizes.

Fluid dynamic bearing system

An electric machine having a hybrid bearing for the purpose of supporting a rotor with respect to a stator, the hybrid bearing consisting of a radial bearing, taking the form of a fluid dynamic bearing, and an axial bearing that is made up of magnetic elements, wherein the magnetic elements comprise at least one permanent magnet and one flux guide element that are disposed so as to be located opposite each other in a radial direction.

Electric machine having a hybrid bearing

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Freiburg, Germany

Igor Ross