EP0462657B1 - Tube à rayons X avec anode tournante - Google Patents

Tube à rayons X avec anode tournante Download PDF

Info

Publication number
EP0462657B1
EP0462657B1 EP91201472A EP91201472A EP0462657B1 EP 0462657 B1 EP0462657 B1 EP 0462657B1 EP 91201472 A EP91201472 A EP 91201472A EP 91201472 A EP91201472 A EP 91201472A EP 0462657 B1 EP0462657 B1 EP 0462657B1
Authority
EP
European Patent Office
Prior art keywords
rotary anode
ray tube
contact surfaces
stem
sensor
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
Application number
EP91201472A
Other languages
German (de)
English (en)
Other versions
EP0462657A1 (fr
Inventor
Rolf Behling
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Philips Patentverwaltung GmbH
Koninklijke Philips Electronics NV
Philips Electronics NV
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 Philips Patentverwaltung GmbH, Koninklijke Philips Electronics NV, Philips Electronics NV filed Critical Philips Patentverwaltung GmbH
Publication of EP0462657A1 publication Critical patent/EP0462657A1/fr
Application granted granted Critical
Publication of EP0462657B1 publication Critical patent/EP0462657B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J35/105—Cooling of rotating anodes, e.g. heat emitting layers or structures
    • H01J35/107—Cooling of the bearing assemblies

Definitions

  • the solution is achieved in that a device is provided by which the change in the thermal resistance is effected as a function of the temperature change of a rotating component which occurs after the electron beam is switched off.
  • the handle has such an axial length and such a small wall thickness that its thermal resistance from the rotating anode plate to the rotor body is greater than 30% of the thermal resistance resulting from the bearing.
  • the heat resistance of the stick and the variable heat resistance are connected in parallel to the heat resistance of the bearing. Relatively large changes in the resulting thermal resistance result when the ratio of the thermal resistance of the stem and the bearing is as large as possible.
  • the distances between the contact surfaces 8 and 10 on the one hand and 9 and 11 on the other hand can be dimensioned differently in such a way that contact occurs at different times or at different temperatures of the rotating anode plate 2. A further reduction in the total cooling time of the rotating anode plate 2 can thereby be achieved.

Landscapes

  • X-Ray Techniques (AREA)

Claims (9)

  1. Tube à rayons X avec anode tournante comprenant des moyens pour modifier, sous l'effet de l'état de fonctionnement, la résistance thermique du trajet d'évacuation de la chaleur qui évacue via un palier (5) la chaleur d'un disque d'anode tournante (2) attaqué par un faisceau d'électrons, caractérisé en ce que sont prévus un capteur détectant la température d'un organe participant à la rotation (3, 7) et un moyen d'entraînement pour déplacer, après l'interruption du faisceau d'électrons, au moins l'organe participant à la rotation (3, 7) afin de ponter un espace intermédiaire, qui existe lorsque le faisceau d'électrons est enclenché, entre deux surfaces de contact (8 à 11) de cet organe et d'un autre organe participant à la rotation (3, 7).
  2. Tube à rayons X avec anode tournante suivant la revendication 1, caractérisé en ce que le capteur est un organe (3) relié avec conduction de la chaleur au disque d'anode tournante (2).
  3. Tube à rayons X avec anode tournante suivant la revendication 1, caractérisé en ce que le capteur est un organe (4) relié avec conduction de la chaleur au palier (5).
  4. Tube à rayons X avec anode tournante suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que le capteur et le moyen d'entraînement sont formés par un élément (3, 7) dont les dimensions se modifient suite à la modification de la température.
  5. Tube à rayons X avec anode tournante suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que les surfaces de contact (8 à 11) des deux organes participant à la rotation (3, 7) sont mobiles l'une vers l'autre sous l'effet de la dilatation thermique d'au moins l'un des organes (3, 7).
  6. Tube à rayons X avec anode tournante suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que le capteur et le moyen d'entraînement sont agencés à l'intérieur d'une douille (3) de forme tubulaire reliant le disque d'anode tournante (2) au rotor (4), que la douille (3) présente au moins une surface de contact (10, 11) et qu'au moins une surface de contact (8, 9) opposée est formée sur une saillie (7) s'étendant à l'intérieur de la douille (3) et reliée avec bonne conduction thermique au rotor (4).
  7. Tube à rayons X avec anode tournante suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que la douille (3) a une longueur axiale telle et une paroi de faible épaisseur (12) telle que sa résistance thermique du disque d'anode tournante (2) jusqu'au rotor (4) soit supérieure à 30% de la résistance thermique obtenue au passage du palier (5).
  8. Tube à rayons X avec anode tournante suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que les surfaces de contact (8 à 11) ont subi une amélioration superficielle.
  9. Tube à rayons X avec anode tournante suivant l'une quelconque des revendications 1 à 8, caractérisé en ce que les surfaces de contact (9, 11) présentent des creux et des reliefs correspondants.
EP91201472A 1990-06-20 1991-06-13 Tube à rayons X avec anode tournante Expired - Lifetime EP0462657B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4019614A DE4019614A1 (de) 1990-06-20 1990-06-20 Drehanodenroentgenroehre
DE4019614 1990-06-20

Publications (2)

Publication Number Publication Date
EP0462657A1 EP0462657A1 (fr) 1991-12-27
EP0462657B1 true EP0462657B1 (fr) 1996-01-24

Family

ID=6408713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91201472A Expired - Lifetime EP0462657B1 (fr) 1990-06-20 1991-06-13 Tube à rayons X avec anode tournante

Country Status (4)

Country Link
US (1) US5146483A (fr)
EP (1) EP0462657B1 (fr)
JP (1) JP3065715B2 (fr)
DE (2) DE4019614A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69306454T2 (de) * 1992-04-08 1997-05-15 Toshiba Kawasaki Kk Drehanoden-Röntgenröhre
US5610385A (en) * 1995-02-23 1997-03-11 Ncr Corporation Optical bar code scanner which produces substantially perpendicular scan lines
US6002745A (en) * 1998-06-04 1999-12-14 Varian Medical Systems, Inc. X-ray tube target assembly with integral heat shields
CN100370576C (zh) * 2001-12-13 2008-02-20 皇家飞利浦电子股份有限公司 具有一体式阳极和承载构件的x射线产生装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT127611B (de) * 1927-01-18 1932-04-11 Philips Nv Röntgenröhre.
DE603896C (de) * 1932-05-30 1934-10-11 C H F Mueller Akt Ges Roentgenroehre, deren Antikathode aus einem feststehenden, gut waermeleitenden Teil besteht, um welchen sich der von den Elektronen getroffene Teil bei seiner Rotation dreht
US3753021A (en) * 1972-04-03 1973-08-14 Machlett Lab Inc X-ray tube anode target
US3790836A (en) * 1972-10-02 1974-02-05 M Braun Cooling means for electrodes
NL8303833A (nl) * 1983-11-08 1985-06-03 Philips Nv Spiraalgroeflager met metaalsmering en antibevochtigingslaag.

Also Published As

Publication number Publication date
DE4019614A1 (de) 1992-01-02
JP3065715B2 (ja) 2000-07-17
US5146483A (en) 1992-09-08
EP0462657A1 (fr) 1991-12-27
DE59107296D1 (de) 1996-03-07
JPH04248235A (ja) 1992-09-03

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