X-ray emitter

Patent metadata

Field	Value
Publication number	US-10002739-B2
Application number	US-201715790284-A
Country	US
Kind code	B2
Filing date	Oct 23, 2017
Priority date	Oct 21, 2016
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

An X-ray emitter has a rotating anode rotatably mounted inside an X-ray tube by way of a multi-sliding surface bearing. The multi-sliding surface bearing has an inner and an outer sliding surface which are mounted so they can rotate relative to each other about an axis of rotation such that a gap is formed between the inner and outer sliding surfaces. A contour of the inner sliding surface, in a plane running perpendicular to the axis of rotation, is formed at least in certain sections by arc-shaped segments which are each centered around center points that are offset from each other.

First claim

The invention claimed is:

1. An X-ray emitter, comprising:
a rotating anode disposed inside an X-ray tube;
a multi-sliding surface bearing rotatably mounting said rotating anode inside said X-ray tube;
said multi-sliding surface bearing having an inner sliding surface and an outer sliding surface that are mounted for rotation relative to each other about an axis of rotation and forming a gap between said inner and outer sliding surfaces;
said inner sliding surface, in a plane running perpendicular to the axis of rotation, having a contour formed at least in certain sections by arc-shaped segments that are each centered around center points arranged so as to be offset from one another.

2. The X-ray emitter according to claim 1 , wherein said outer sliding surface is centered around the axis of rotation and at least one of said arc-shaped segments of said inner sliding surface is centered around a center point that is eccentrically offset from the axis of rotation.

3. The X-ray emitter according to claim 1 , wherein all center points of said arc-shaped segments are arranged eccentrically offset at an equal radial spacing distance in respect of the axis of rotation.

4. The X-ray emitter according to claim 1 , wherein the center points of said arc-shaped segments are arranged at regular angular positions circumferentially around the axis of rotation.

5. The X-ray emitter according to claim 4 , wherein the center points arranged at regular angular positions are offset from each other by an angle matching a quotient of 360° divided by a number of said arc-shaped segments of the inner sliding surface.

6. The X-ray emitter according to claim 1 , wherein said arc-shaped segments of said inner sliding surface have a radius and the radii of all said arc-shaped segments of said inner sliding surface assume the same value.

7. The X-ray emitter according to claim 1 , wherein said inner sliding surface has at least two said arc-shaped segments.

8. The X-ray emitter according to claim 1 , wherein said inner sliding surface of said multi-sliding surface bearing runs parallel to the axis of rotation.

Assignees

• Siemens Healthcare Gmbh

Inventors

• Sporbeck Thorsten

Classifications

• H01J35/101 Primary

  Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving · CPC title

• H01J2235/1046

  Bearings and bearing contact surfaces · CPC title

• H01J35/1017 Primary

  Bearings for rotating anodes · CPC title

• F16C17/028 Primary

  with fixed wedges to generate hydrodynamic pressure, e.g. multi-lobe bearings · CPC title

• H01J35/10 Primary

  Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes · CPC title