EP0710976B1 - Drehanoden-Röntgenröhre mit einem Gleitlager - Google Patents
Drehanoden-Röntgenröhre mit einem Gleitlager Download PDFInfo
- Publication number
- EP0710976B1 EP0710976B1 EP95202896A EP95202896A EP0710976B1 EP 0710976 B1 EP0710976 B1 EP 0710976B1 EP 95202896 A EP95202896 A EP 95202896A EP 95202896 A EP95202896 A EP 95202896A EP 0710976 B1 EP0710976 B1 EP 0710976B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ray tube
- bearing
- anode
- rotary
- solid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007787 solid Substances 0.000 claims description 20
- 239000000314 lubricant Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 6
- XMWRBQBLMFGWIX-UHFFFAOYSA-N C60 fullerene Chemical class C12=C3C(C4=C56)=C7C8=C5C5=C9C%10=C6C6=C4C1=C1C4=C6C6=C%10C%10=C9C9=C%11C5=C8C5=C8C7=C3C3=C7C2=C1C1=C2C4=C6C4=C%10C6=C9C9=C%11C5=C5C8=C3C3=C7C1=C1C2=C4C6=C2C9=C5C3=C12 XMWRBQBLMFGWIX-UHFFFAOYSA-N 0.000 claims description 5
- 229910003472 fullerene Inorganic materials 0.000 claims description 5
- 229910000807 Ga alloy Inorganic materials 0.000 claims description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 3
- -1 tungsten diselenite Chemical compound 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000012212 insulator Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 150000003346 selenoethers Chemical class 0.000 description 3
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- IYJABVNLJXJBTP-UHFFFAOYSA-N bis(selanylidene)tantalum Chemical compound [Se]=[Ta]=[Se] IYJABVNLJXJBTP-UHFFFAOYSA-N 0.000 description 1
- ROUIDRHELGULJS-UHFFFAOYSA-N bis(selanylidene)tungsten Chemical compound [Se]=[W]=[Se] ROUIDRHELGULJS-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003879 lubricant additive Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
- 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
- H01J35/1017—Bearings for rotating anodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/10—Drive means for anode (target) substrate
- H01J2235/1046—Bearings and bearing contact surfaces
- H01J2235/106—Dynamic pressure bearings, e.g. helical groove type
Definitions
- the invention relates to a rotating anode X-ray tube with a plain bearing the preamble of claim 1.
- a rotating anode X-ray tube is from EP-A-578 314 (US-A-5 381 456) or from EP-A-378 274 (US-A-5,077,775) known.
- EP-A-578 314 US-A-5 381 456
- EP-A-378 274 US-A-5,077,775
- gallium alloys used in such rotating anode X-ray tubes in the generally used as a lubricant very good lubricating properties have, it can nevertheless wear the bearing surfaces, namely then when the lubricant after a long standstill of the rotating anode or after decelerating the bearing at high temperatures (or lower Lubricant viscosity) from the area of the groove pattern is pushed out.
- the object of the present invention is to reduce this wear. This The object is achieved by the measures specified in claim 1.
- any dry lubricant is suitable as a solid that neither with the Bearing surfaces still react with the lubricant that the Reduces sliding friction coefficient between the bearing surfaces and that Vacuum in the X-ray tube is not affected.
- the invention is explained below with reference to a drawing.
- the in the Rotary anode X-ray tube shown in the drawing has a metal piston 1 the one via an insulator 2 and the cathode 3 via a second insulator 4 Rotating anode is attached.
- the rotating anode comprises an anode disc 5, on the of which Cathode 3 opposite surface when switching on a high voltage X-ray radiation is generated.
- the x-ray radiation can Radiation exit window 6 emerge in the bulb, which is preferably made of beryllium consists.
- the anode disk 5 is connected to a carrier body 7 via a slide bearing connected, which is attached to the second insulator 4.
- the plain bearing includes one bearing axis 8 firmly connected to the carrier body 7 and a bearing axis 8 concentrically enclosing bearing shell 9, which has a rotor at its lower end 10 to drive the at the top attached anode disc 5.
- the bearing axis 8 and the bearing shell 9 consist of a Molybdenum alloy (TZM). Instead, molybdenum can also be used or a tungsten-molybdenum alloy is used become.
- ZMM Molybdenum alloy
- tungsten-molybdenum alloy is used become.
- the bearing axis 8 At its upper end, the bearing axis 8 with two in Groove patterns 11 offset in the axial direction provided for absorbing radial forces.
- the bearing axis 8 has a groove pattern several millimeters thick section 14, the diameter of which is substantially larger is the diameter of the rest of the bearing axis 8.
- Below this is again a section whose diameter at least approximately the diameter of the bearing axis 8 corresponds in the upper area and that with the carrier body 7 is connected.
- the inner contour of the bearing shell is adapted to section 14.
- the free end faces on the top and on the bottom of section 14 are provided with a groove pattern, that consists of pairs of tapered grooves put together.
- the grooves preferably run here corresponding to the arcs of two logarithmic Spirals with opposite directions of rotation. This can forces acting in the axial direction are absorbed.
- the gap between the bearing axis 8 and the bearing shell 9 is at least in the area of the groove pattern with a liquid Lubricant filled, preferably a gallium alloy.
- the width of the gap can be the depth of the Correspond to grooves and in practice, for example, between 10 ⁇ m and 30 ⁇ m are. If the rotating anode in the the specified direction of rotation rotates, the lubricant transported in the area of the groove pattern, in where the groove patterns come together in pairs. Build here pressure in the lubricant which is radial or can absorb forces acting axially on the bearing, and the bearing shell 9 "floats" in this state on the Bearing axis 8.
Landscapes
- Sliding-Contact Bearings (AREA)
Description
Claims (6)
- Drehanoden-Röntgenröhre mit einem Gleitlager, das einen festen und einen drehbaren Lagerteil (8,9) mit einander zugewandten Lagerflächen umfaßt, von denen wenigstens eine mit einem Rillenmuster (11) versehen ist, wobei sich zwischen den Lagerflächen ein zumindest im Betriebszustand flüssiges Schmiermittel in Form einer Galliumlegierung befindet,
dadurch gekennzeichnet, daß dem Schmiermittel ein Feststoff mit niedriger Gleitreibung zugesetzt ist und daß der Feststoffgehalt zwischen 0,05 und 5 Gew. % liegt. - Drehanoden-Röntgenröhre nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß der Feststoff aus Wolframoder Tantaldiselenid besteht. - Drehanoden-Röntgenröhre nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß der Feststoff aus Molybdändisulfid besteht. - Drehanoden-Röntgenröhre nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß der Feststoff aus monodispersen Oxidpartikeln besteht. - Drehanoden-Röntgenröhre nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß der Feststoff aus Fullerenen besteht. - Drehanoden-Röntgenröhre nach Anspruch 1 bis 5,
dadurch gekennzeichnet, daß der Feststoffgehalt zwischen 0,1 und 2 Gew.%, insbesondere zwischen 0,3 und 1 Gew. % liegt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4439143A DE4439143A1 (de) | 1994-11-03 | 1994-11-03 | Drehanoden-Röntgenröhre mit einem Gleitlager |
| DE4439143 | 1994-11-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0710976A1 EP0710976A1 (de) | 1996-05-08 |
| EP0710976B1 true EP0710976B1 (de) | 2000-02-02 |
Family
ID=6532312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95202896A Expired - Lifetime EP0710976B1 (de) | 1994-11-03 | 1995-10-25 | Drehanoden-Röntgenröhre mit einem Gleitlager |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5619549A (de) |
| EP (1) | EP0710976B1 (de) |
| JP (1) | JPH08212949A (de) |
| DE (2) | DE4439143A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090103684A1 (en) * | 2004-10-26 | 2009-04-23 | Koninklijke Philips Electronics, N.V. | Molybdenum-molybdenum brazing and rotary-anode x-ray tube comprising such a brazing |
| JP5815626B2 (ja) | 2013-09-27 | 2015-11-17 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | 放射線断層撮影装置の制御方法及び放射線断層撮影装置並びにプログラム |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL63490C (de) * | 1941-03-04 | 1900-01-01 | ||
| US3427244A (en) | 1966-03-16 | 1969-02-11 | Westinghouse Electric Corp | Solid lubricant composites |
| DE3616133A1 (de) | 1985-09-25 | 1987-11-19 | Merck Patent Gmbh | Kugelfoermige sio(pfeil abwaerts)2(pfeil abwaerts)-partikel |
| DE3900730A1 (de) | 1989-01-12 | 1990-07-19 | Philips Patentverwaltung | Drehanoden-roentgenroehre mit wenigstens zwei spiralrillenlagern |
| US4962519A (en) * | 1989-03-31 | 1990-10-09 | General Electric Company | Lubricated bearing retainer for X-ray tube |
| DE4222225A1 (de) | 1992-07-07 | 1994-01-13 | Philips Patentverwaltung | Gleitlager für eine Drehanoden-Röntgenröhre |
| US5292444A (en) * | 1992-10-02 | 1994-03-08 | Exxon Research And Engineering Company | Lube oil compositions containing fullerene-grafted polymers |
| EP2240028B1 (de) | 2007-12-06 | 2016-07-20 | Intra-Cellular Therapies, Inc. | Pyrazolopyrimidine-4,6-dione derivate und deren Anwendung als Pharmaceutika |
-
1994
- 1994-11-03 DE DE4439143A patent/DE4439143A1/de not_active Withdrawn
-
1995
- 1995-10-25 EP EP95202896A patent/EP0710976B1/de not_active Expired - Lifetime
- 1995-10-25 DE DE59507730T patent/DE59507730D1/de not_active Expired - Fee Related
- 1995-10-31 JP JP7283430A patent/JPH08212949A/ja active Pending
- 1995-11-03 US US08/552,404 patent/US5619549A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE4439143A1 (de) | 1996-05-09 |
| DE59507730D1 (de) | 2000-03-09 |
| JPH08212949A (ja) | 1996-08-20 |
| US5619549A (en) | 1997-04-08 |
| EP0710976A1 (de) | 1996-05-08 |
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| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
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