DE891430C - Rotating anode for X-ray tubes - Google Patents

Rotating anode for X-ray tubes

Info

Publication number
DE891430C
DE891430C DEM4306D DEM0004306D DE891430C DE 891430 C DE891430 C DE 891430C DE M4306 D DEM4306 D DE M4306D DE M0004306 D DEM0004306 D DE M0004306D DE 891430 C DE891430 C DE 891430C
Authority
DE
Germany
Prior art keywords
ray tubes
rotating anode
bearings
lubricant
graphite
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
Application number
DEM4306D
Other languages
German (de)
Inventor
Franz Dr Phil Lohmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHF Mueller AG
Original Assignee
CHF Mueller AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHF Mueller AG filed Critical CHF Mueller AG
Priority to DEM4306D priority Critical patent/DE891430C/en
Application granted granted Critical
Publication of DE891430C publication Critical patent/DE891430C/en
Expired legal-status Critical Current

Links

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
    • H01J2235/1066—Treated contact surfaces, e.g. coatings

Landscapes

  • Rolling Contact Bearings (AREA)

Description

Drehanode für Röntgenröhren Bei Röntgenröhren mit Drehanode, bei denen -die Lager der Anode, im Hochvakuumraum liegen, ist es nicht möglich, diese Lager mit einem der üblichen organischen Mittel .zu schmieren, weil der Dampfdruck dieser Schmiermittel bei der Betriebstemperatur der Anodenlager so hoch wird, daß die Spannungsfestigkeit der Röhre verlorengeht. Man hat deshalb versucht, .die Lager der Drehanoide entweder ohne jedes Schmiermittel zu betreiben oder aber die Lager mit Graphit oder weichen Metallen, wie Zinn oder Barium, zu präparieren. Diese Maßnahmen, haben jedoch den, Nachteil, daß die Lager insbesondere bei. schwereren Anoden oder höherer Umdrehungsgeschwindigkeit (ioo bis 5oo Hz) sehr leicht festlaufen und festfressen, weil der Graphitfilm oder Bariumfilm auf den Laufflächen des Lagers .aufreißt und sich im Gegensatz zu dem Schmiermittelfilm bei Öl- oder Fettschmierung nicht wieder schließt.Rotating anode for X-ray tubes For X-ray tubes with a rotating anode, where -the bearings of the anode, are located in the high vacuum space, it is not possible to use these bearings with one of the usual organic means. to lubricate, because the vapor pressure of this Lubricant at the operating temperature of the anode bearings becomes so high that the dielectric strength the tube is lost. Attempts have therefore been made to either to operate without any lubricant or the bearings with graphite or soft To prepare metals such as tin or barium. These measures, however, have the Disadvantage that the camp in particular. heavier anodes or higher rotational speed (100 to 500 Hz) stick and seize very easily because the graphite film or Barium film on the running surfaces of the bearing .rises and in contrast to the The lubricant film does not close again with oil or grease lubrication.

Erfindungsgemäß, werden diese Schwierigkeiten dadurch behoben, :daß die aufeinander gleitenden oder rollenden Flächen der Lager sämtlich oder teilweise mit einer auf der Unterlage festhaftenden kristallinen Schicht, wie s:ie z. B. bei ,den unter der Bezeichnung Atramentieren bekannten Verfahren entstehen, überzogen und nötigenfalls zusätzlich mit Graphit oder weichen Metallen z. B. durch Aufstreichen bzw. Aufdampfen präpariert werden.According to the invention, these difficulties are eliminated by: that all or part of the surfaces of the bearings sliding or rolling on one another with a firmly adhering crystalline layer, such as s: ie z. B. at , the process known as atramentizing and if necessary additionally with graphite or soft metals z. B. by spreading or vapor deposition.

Bei Kugellagern werden vorzugsweise, die Lagerschalem mit der genannten festhaftenden kristallinen Schicht überzogen. Zusätzlich können auch :die Kugeln mit einer besonders dünnen derartigen Schicht überzogen werden. Die Dicke- der Schicht beträgt etwa 5 bis zo Mikron.In the case of ball bearings, the bearing shells with the aforementioned firmly adhering crystalline layer coated. Additionally you can also: the balls are coated with a particularly thin layer of this type. The thickness of the layer is about 5 to zo microns.

Claims (1)

PATfNTANS.PRÜCHE: r. Drehanode für Röntgenröhren, dadurch gekennzeichnet, daB die .aufeinander gleitenden oder rollenden Flächen der Lager sämtlich oder teilweise mit einer auf .der Unterlage festhaftenden kristallinen Schicht überzogen sind. z. Drehanode nach Anspruch z, dadurch gekennzeichnet, .d.aß zusätzlich Graphit oder ein weiches Metall (Zinn oder Barium) als Schmiermittel Verwendung findet. Angezogene Druckschriften: Französische Patentschriften Nr. 841545, 863 677; französische Zusatzpatentschrift Nr. 49 1a9.PATfNTANS. CLAIMS: r. Rotary anode for X-ray tubes, characterized in that the surfaces of the bearings which slide or roll on one another are all or partially covered with a crystalline layer adhering firmly to the base. z. Rotary anode according to claim z, characterized in that graphite or a soft metal (tin or barium) is also used as a lubricant. References: French Patent Nos. 841545, 863 677; French additional patent specification No. 49 1a9.
DEM4306D 1942-08-15 1942-08-15 Rotating anode for X-ray tubes Expired DE891430C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEM4306D DE891430C (en) 1942-08-15 1942-08-15 Rotating anode for X-ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM4306D DE891430C (en) 1942-08-15 1942-08-15 Rotating anode for X-ray tubes

Publications (1)

Publication Number Publication Date
DE891430C true DE891430C (en) 1953-09-28

Family

ID=7292612

Family Applications (1)

Application Number Title Priority Date Filing Date
DEM4306D Expired DE891430C (en) 1942-08-15 1942-08-15 Rotating anode for X-ray tubes

Country Status (1)

Country Link
DE (1) DE891430C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852908A1 (en) * 1977-12-09 1979-06-13 Philips Nv ROTATING ANODE TUBE

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR49129E (en) * 1937-01-30 1938-11-07
FR841545A (en) * 1937-08-02 1939-05-22 Philips Nv X-ray tubes with a rotating anode
FR863677A (en) * 1939-03-10 1941-04-07 Machlett Lab Inc Vacuum tube device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR49129E (en) * 1937-01-30 1938-11-07
FR841545A (en) * 1937-08-02 1939-05-22 Philips Nv X-ray tubes with a rotating anode
FR863677A (en) * 1939-03-10 1941-04-07 Machlett Lab Inc Vacuum tube device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852908A1 (en) * 1977-12-09 1979-06-13 Philips Nv ROTATING ANODE TUBE

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