Koninklijke Philips Corporation N.V.

Michael Luebcke

Gereon Vogtmeier

Rolf Karl Otto Behling

Willem Potze

Peter Klaus Bachmann

Christoph Helmut Bathe

Anand Kumar Dokania

Christian Herbert Blome

Krishna Swamy

Van-Minh Duong

A self-acting, sealed hydrodynamic bearing includes a bearing shaft; a bearing bushing arranged to seal a length of the bearing shaft; a lubricant provided in the sealed length of the hydrodynamic bearing; and a bearing arrangement between the shaft and bushing. The bearing shaft and/or the bearing bushing are configured to be rotatable. The bearing arrangement includes a primary bearing surface disposed on the bearing bushing, arranged to face a secondary bearing surface disposed on the bearing shaft. The primary and/or secondary bearing surfaces includes first regions having a first fluid slip characteristic, and second regions having a second fluid slip characteristic substantially different to that of the first fluid slip characteristic. The second and first regions are in a same plane of a cross-section of the primary and/or secondary bearing surfaces, and are disposed in an interleaved pattern over the primary and/or secondary bearing surfaces.

Hydrodynamic bearings

The invention relates to a rotary-anode X-ray tube which includes a sleeve bearing having an axial bearing section and a radial bearing section. Furthermore, radial sealing sections () are provided in an outer bearing member () which have no functional relation to the axial bearing surfaces () of the axial bearing section. Thus, additional sealing principles like gaskets or sealing edges can be used although this may result in degradation of surface parallelism.

Rotary-anode X-ray tube with reduced radial sealing

An X-ray tube for generating X-radiation includes a rotary structure having a rotating anode, a stationary structure for rotatably supporting the rotary structure, and a hydrodynamic bearing which is arranged between the rotary structure and the stationary structure. The bearing includes a gap between the rotary structure and the stationary structure, a stabilizer configured to stabilize dimensions of the gap with respect to distortions because of thermo-mechanical causes.

Bearing within an X-ray tube

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Hamburg, Germany

Michael Luebcke