EP0229192A1 - Fixation de rotor pour tube à rayons X - Google Patents

Fixation de rotor pour tube à rayons X Download PDF

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Publication number
EP0229192A1
EP0229192A1 EP85108686A EP85108686A EP0229192A1 EP 0229192 A1 EP0229192 A1 EP 0229192A1 EP 85108686 A EP85108686 A EP 85108686A EP 85108686 A EP85108686 A EP 85108686A EP 0229192 A1 EP0229192 A1 EP 0229192A1
Authority
EP
European Patent Office
Prior art keywords
bearing
anode
envelope
central bore
assembly
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.)
Withdrawn
Application number
EP85108686A
Other languages
German (de)
English (en)
Inventor
Heinrich F. Klostermann
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.)
Individual
Original Assignee
Individual
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
Priority to US06/546,616 priority Critical patent/US4545064A/en
Application filed by Individual filed Critical Individual
Priority to EP85108686A priority patent/EP0229192A1/fr
Publication of EP0229192A1 publication Critical patent/EP0229192A1/fr
Withdrawn legal-status Critical Current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
    • H01J35/101—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
    • H01J35/1024—Rolling bearings

Definitions

  • This invention relates to a unique mounting for rotating anode assemblies in x-ray tubes. More particularly, this invention relates to a rotating anode x-ray tube wherein the anode shaft assembly is supported by a ball bearing at each end of the supporting shaft.
  • the present invention discloses a mounting for rotating anodes in an x-ray tube where the anode is mounted on a hollow assembly including a motor rotor and is supported by two bearings with one bearing secured against axial movement by a threaded fastener engaging a threaded stud projecting from an end wall of the x-ray tube envelope.
  • an evacuated or vacuum-tight x-ray tube envelope 10 carries a rotating anode assembly 12 having a central bore 14. Anode 16 is carried at a point on the assembly intermediate its ends. A motor rotor 18 is carried at one end of the assembly 12. Envelope 10 is made up (in part) of an end wall 20, a set of wall laminations 22, a sleeve 24, and a rotor end plate 26. A stud or cylindrical projection 28 is secured to end wall 20. Distal end 30 of stud 28 is threaded.
  • the rotor end of tube envelope 10 is preferably formed by positioning laminations 22 on sleeve 24 and casting a copper end wall 20 to retain stud 28. This results in a relatively inaccessible bearing mounting location on stud 28.
  • the rotor mounting of this invention overcomes this relative inaccessibility, however, as will be later described.
  • the tube envelope 10 is further made up of a cylindrical wall 32 carrying a conventional x-ray transparent window 34.
  • the vacuum integrity of the tube envelope is completed by an anode end plate 36 through which an anode connector 38 and a cathode connector 40 project.
  • An anode insulator 42 is mounted on end plate 36 and also forms a bearing mounting. Electrical connection to the anode is made by means of wire connector 44 which is trapped below a lip 46 of a metallic spring cup 48 which permits current to flow through a bearing 50 and a shaft 52 to anode 16. Bearing 50 is retained by a snap ring 54 on the end of shaft 52.
  • Anode 16 is electrically isolated from rotor 18 by ceramic spacer 56.
  • a bearing 58 is retained in rotor 18 by a snap ring 60.
  • Bearing 58 and snap ring 60 are carried by a sleeve 62, which is preferably formed of Kovar to enable its attachment to the ceramic spacer 56 by brazing.
  • a set of rotor laminations 64 form a squirrel cage construction with a pair of end rings 66 and a rotor balancing weight 68.
  • the rotor laminations 64, end rings 66, and balancing weight 68 are carried by a rotor sleeve insert 70 which is secured to sleeve 62.
  • Bearing 58 is axially positioned by a shoulder 72 on stud 28.
  • a nut 74 holds bearing 58 against shoulder 72.
  • Nut 74 carries a slotted cap or head 76 which is secured thereto.
  • an equivalent part may be formed corresponding to nut 74 and cap 76 which has internal threads to engage threaded distal end 30 of stud 28 and further has an appropriate configuration on end 78 to receive torque delivered by a tool (such as a screw or nut driver) through bore 14.
  • nut 74 is loosely inserted into the rotor end of assembly 12.
  • Bearing 58 and snap ring 60 are then installed, loosely retaining nut 74.
  • Assemby 12 is then loaded into tube envelope 10 which may be complete except for end plate 36 and its respectively attached parts.
  • a screw driver (or other appropriate tool) is inserted through central bore 14 to engage slot 80 in cap 76.
  • any appropriate configuration between a driving tool and cap 76 may be provided at end 78 to permit torque transmission from the tool to cap 76.
  • Cap 76 is then threaded onto and secured to stud 28.
  • end wall 36 with its associated parts is then joined with the remainder of envelope 10 in a vacuum-tight relationship, as, for example, by brazing.
  • Insulator 42 engages bearing 50 providing a bearing mounting which prevents radial movement, but allows axial movement of bearing 50 to accommodate thermal expansion of assembly 12 which occurs during normal tube operation.

Landscapes

  • X-Ray Techniques (AREA)
EP85108686A 1983-10-28 1985-07-11 Fixation de rotor pour tube à rayons X Withdrawn EP0229192A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US06/546,616 US4545064A (en) 1983-10-28 1983-10-28 X-ray tube rotor mounting
EP85108686A EP0229192A1 (fr) 1985-07-11 1985-07-11 Fixation de rotor pour tube à rayons X

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85108686A EP0229192A1 (fr) 1985-07-11 1985-07-11 Fixation de rotor pour tube à rayons X

Publications (1)

Publication Number Publication Date
EP0229192A1 true EP0229192A1 (fr) 1987-07-22

Family

ID=8193615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108686A Withdrawn EP0229192A1 (fr) 1983-10-28 1985-07-11 Fixation de rotor pour tube à rayons X

Country Status (1)

Country Link
EP (1) EP0229192A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0319244A2 (fr) * 1987-11-30 1989-06-07 Theratronics International Limited Construction de tube à rayons X du type métal céramique refroidi par air

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2216888A (en) * 1939-07-19 1940-10-08 Machlett Lab Inc X-ray tube
US3758801A (en) * 1972-05-22 1973-09-11 Machlett Lab Inc Cylindrical target x-ray tube
DE2748069A1 (de) * 1977-10-26 1979-05-03 Braun M Gmbh Drehanodenkonstruktion in einem roentgengenerator
FR2439476A1 (fr) * 1978-10-16 1980-05-16 Philips Nv Tube de rontgen muni d'une anode rotative
FR2453498A1 (fr) * 1979-04-03 1980-10-31 Siemens Ag Anode tournante pour tube a rayons x
US4316129A (en) * 1977-11-02 1982-02-16 The Machlett Laboratories, Incorporated X-Ray tube control system
US4519093A (en) * 1980-08-19 1985-05-21 Tokyo Shibaura Denki Kabushiki Kaisha Rotary anode X-ray tube

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2216888A (en) * 1939-07-19 1940-10-08 Machlett Lab Inc X-ray tube
US3758801A (en) * 1972-05-22 1973-09-11 Machlett Lab Inc Cylindrical target x-ray tube
DE2748069A1 (de) * 1977-10-26 1979-05-03 Braun M Gmbh Drehanodenkonstruktion in einem roentgengenerator
US4316129A (en) * 1977-11-02 1982-02-16 The Machlett Laboratories, Incorporated X-Ray tube control system
FR2439476A1 (fr) * 1978-10-16 1980-05-16 Philips Nv Tube de rontgen muni d'une anode rotative
FR2453498A1 (fr) * 1979-04-03 1980-10-31 Siemens Ag Anode tournante pour tube a rayons x
US4519093A (en) * 1980-08-19 1985-05-21 Tokyo Shibaura Denki Kabushiki Kaisha Rotary anode X-ray tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0319244A2 (fr) * 1987-11-30 1989-06-07 Theratronics International Limited Construction de tube à rayons X du type métal céramique refroidi par air
EP0319244A3 (en) * 1987-11-30 1989-09-13 Medical Electronic Imaging Corporation Air cooled metal ceramic x-ray tube construction

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