Liquid metal bearing

Patent metadata

Field	Value
Publication number	US-9890812-B2
Application number	US-201414458027-A
Country	US
Kind code	B2
Filing date	Aug 12, 2014
Priority date	Aug 13, 2013
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A liquid metal bearing includes at least one first bearing part and at least one second bearing part that have a non-positive fit connection to one another. At least one first ductile sealing layer is disposed at least partly between at least a first bearing part of the at least one bearing and a second bearing part of the at least one second bearing part.

First claim

The invention claimed is:

1. A liquid metal bearing comprising:
at least one first bearing part;
at least one second bearing part, wherein the at least one first bearing part and the at least one second bearing part have a non-positive fit connection to one another;
at least one first ductile sealing layer that is disposed at least partly between a first bearing part of the at least one first bearing part and a second bearing part of the at least one second bearing part; and
an intermediate ring that is disposed between the first bearing part and the second bearing part, the intermediate ring comprising:
a first surface that faces the first bearing part; and
a second surface opposite the first surface, the second surface facing the second bearing part, wherein the first surface is spaced at a distance from the first bearing part and the second surface is spaced at a distance from the second bearing part,

wherein:
a ductile sealing layer of the at least one first ductile sealing layer is disposed on the first bearing part, the second bearing part, or the first bearing part and the second bearing part, respectively, an outermost surface of the respective ductile sealing layer facing and being at a distance from the intermediate ring;
another ductile sealing layer of the at least one first ductile sealing layer is disposed on the first surface of the intermediate ring, the second surface of the intermediate ring, or the first surface of the intermediate ring and the second surface of the intermediate ring, respectively, an outermost surface of the respective other ductile sealing layer facing and being at a distance from the first bearing part, the second bearing part, or the first bearing part and the second bearing part, respectively; or
a combination thereof.

2. The liquid metal bearing of claim 1 , further comprising a second ductile sealing layer that is disposed between the first bearing part and the second bearing part.

3. The liquid metal bearing of claim 2 ,
wherein the at least one first ductile sealing layer is disposed at least partly between the first bearing part and the first surface of the intermediate ring, and the second ductile sealing layer is disposed at least partly between the second surface of the intermediate ring and the second bearing part.

4. The liquid metal bearing of claim 1 , wherein the at least one first ductile sealing layer is made of lead, copper, indium, tin, aluminum, gold, silver, graphite, alkali halides, or a combination thereof.

5. The liquid metal bearing of claim 2 , wherein at least one ductile sealing layer of the at least one first ductile sealing layer and the second ductile sealing layer is configured as a film.

6. The liquid metal bearing of claim 2 , wherein at least one ductile sealing layer of the at least one first ductile sealing layer and the second ductile sealing layer is configured as a PVD layer.

7. The liquid metal bearing of claim 5 , wherein the film has a layer thickness of between 50 μm and 2,000 μm.

8. The liquid metal bearing of claim 6 , wherein the PVD layer has a layer thickness of between 5 μm and 200 μm.

9. An x-ray emitter comprising:
an emitter housing;
an x-ray tube comprising a vacuum housing and a drive motor, the x-ray tube being disposed in the emitter housing;
a cathode and a rotary anode disposed in the vacuum housing, wherein the rotary anode is held in a torsion-proof manner on a rotor shaft coupled to the drive motor, and
wherein the rotor shaft is supported rotatably by at least one liquid metal bearing, the at least one liquid metal bearing comprising:
at least one first bearing part;
at least one second bearing part, wherein the at least one first bearing part and the at least one second bearing part have a non-positive fit connection to one another;
at least one first ductile sealing layer that is disposed at least partly between a first bearing part of the at least one first bearing part and a second bearing part of the at least one second bearing part; and
an intermediate ring that is disposed between the first bearing part and the second bearing part, the intermediate ring comprising:
a first surface that faces the first bearing part; and
a second surface opposite the first surface, the second surface facing the second bearing part, wherein the first surface is spaced at a distance from the first bearing part and the second surface is spaced at a distance from the second bearing part,

wherein:
a ductile sealing layer of the at least one first ductile sealing layer is disposed on the first bearing part, the second bearing part, or the first bearing part and the second bearing part, respectively, an outermost surface of the respective ductile sealing layer facing and being at a distance from the intermediate ring;
another ductile sealing layer of the at least one first ductile sealing layer is disposed on the first surface of the intermediate ring, the second surface of the intermediate ring, or the first surface of the intermediate ring and the second surface of the intermediate ring, respectively, an outermost surface of the respective other ductile sealing layer facing and being at a distance from the first bearing part, the second bearing part, or the first bearing part and the second bearing part, respectively; or
a combination thereof.

10. The x-ray emitter of claim 9 , wherein the at least one liquid metal bearing further comprises a second ductile sealing layer that is disposed between the first bearing part and the second bearing part.

11. The x-ray emitter of claim 10 ,
wherein the at least one first ductile sealing layer is disposed at least partly between the first bearing part and the first surface of the intermediate ring, and the second ductile sealing layer is disposed at least partly between the second surface of the intermediate ring and the second bearing part.

12. The x-ray emitter of claim 9 , wherein the at least one first ductile sealing layer is made of lead, copper, indium, tin, aluminum, gold, silver, graphite, alkali halides, or a combination thereof.

13. The x-ray emitter of claim 10 , wherein at least one ductile sealing layer of the at least one first ductile sealing layer and the second ductile sealing layer is configured as a film.

14. The x-ray emitter of claim 10 , wherein at least one ductile sealing layer of the at least one first ductile sealing layer and the second ductile sealing layer is configured as a PVD layer.

15. The x-ray emitter of claim 13 , wherein the film has a layer thickness of between 50 μm and 2,000 μm.

16. The x-ray emitter of claim 14 , wherein the PVD layer has a layer thickness of between 5 μm and 200 μm.

Assignees

• Dittrich Ronald
• Fuchs Manfred
• Siemens Ag

Inventors

• Dittrich Ronald
• Fuchs Manfred

Classifications

• F16C32/0633 Primary

  the liquid being retained in a gap · CPC title

• H01J35/101

  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

• F16C2223/60

  by vapour deposition, e.g. PVD, CVD · CPC title

• H01J2235/1086

  liquid metals · CPC title

• F16C2380/16

  X-ray tubes · CPC title