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WO2016179614A1 - Anode tournante utilisable sur deux faces - Google Patents

Anode tournante utilisable sur deux faces Download PDF

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Publication number
WO2016179614A1
WO2016179614A1 PCT/AT2016/000049 AT2016000049W WO2016179614A1 WO 2016179614 A1 WO2016179614 A1 WO 2016179614A1 AT 2016000049 W AT2016000049 W AT 2016000049W WO 2016179614 A1 WO2016179614 A1 WO 2016179614A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotary anode
anode
rotary
base body
shaft
Prior art date
Application number
PCT/AT2016/000049
Other languages
German (de)
English (en)
Inventor
Nico Eberhardt
Wolfram Knabl
Stefan SCHÖNAUER
Andreas WUCHERPFENNIG
Original Assignee
Plansee Se
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 Plansee Se filed Critical Plansee Se
Publication of WO2016179614A1 publication Critical patent/WO2016179614A1/fr

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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/08—Targets (anodes) and X-ray converters
    • 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
    • H01J2235/1006—Supports or shafts for target or substrate
    • H01J2235/1013—Fixing to the target or substrate

Definitions

  • the present invention relates to a double-sided rotary anode for generating X-radiation.
  • X-ray anodes are used in X-ray devices such as in
  • X-ray anode accelerates and penetrates the anode material, producing X-ray radiation. A large part of the energy of the electron beam is dissipated into heat in the x-ray anode, whereby very high thermal loads occur in the focal region of the x-ray anode.
  • X-ray anodes are usually designed as a stationary component in the form of a stationary anode with a focal spot or as a rotating component in the form of a rotary anode with an annular focal path. In the case of rotary anodes, a comparatively thin, annular focal point lining is in most cases formed on the surface of a disc-shaped base body
  • X-ray generating material for example of tungsten or a tungsten alloy, is provided, which is scanned in use due to the rotational movement of the X-ray rotary anode by the electron beam selectively along an annular path. Due to the rotational movement of the rotary anode, the thermal load can be better distributed on the main body of the rotary anode during operation.
  • Lifetime of the rotary anode can also be achieved by applying a new
  • Object of the present invention is a rotary anode with extended
  • a rotary anode for generating X-ray radiation which has a, preferably substantially disk-shaped, base body with a first side and a second side, which is opposite to the first side.
  • the base body is arranged at least a first focal track coating and on the second side of the base body at least a second focal track coating is arranged. Furthermore, at the base of the rotary anode in the area of
  • a mounting portion which serves to attach the body to an anode shaft.
  • the mounting portion is designed such that the base body can be fastened on both sides to the anode shaft.
  • the anode shaft is the component of the X-ray device to which the rotary anode directly or via a
  • Connection component is coupled to a drive unit.
  • the anode wave is not part of the rotary anode.
  • the central idea of the rotary anode according to the invention is that this allows a double-sided use.
  • the rotating anode according to the invention can be removed from the anode shaft and turned by 180 °, so now the other side of the rotary anode faces the electron beam and the focal point coating on this side, which is now the active side of the rotary anode, for the production of X-rays is used. Therefore, the rotary anode according to the invention must be revised or renewed only when the fur coats are worn on both sides. Due to the two-sided applicability of the life of the rotary anode according to the invention is significantly extended, compared to a conventional
  • the geometry of the rotary anode is selected such that the properties of the rotary anode do not change when the rotary anode is turned by 180 °.
  • the geometry of the first and second focal lamination pads is coordinated, for example by the first and second
  • the first and second focal track coverings can have the same internal and / or
  • first and second focal-web coverings are arranged symmetrically with respect to a plane of symmetry which is oriented normal to the axis of rotation of the rotary anode.
  • the second focal track coating is therefore after turning the rotary anode by 180 ° in exactly the same position as the first focal track coating before turning the rotary anode. So that the functionality of the rotary anode does not change when the active focal point side changes, it can further be provided that the mounting section, which serves to fasten the rotary anode to an anode shaft, opens symmetrically symmetrically with respect to a plane of symmetry the axis of rotation is.
  • the main body of the rotary anode may be symmetrical with respect to this plane of symmetry.
  • the entire rotary anode is formed symmetrically with respect to this plane of symmetry. All of these symmetry features cause the properties of the rotating anode to be invariant with respect to its mounting position in the X-ray device, ie, the relevant properties of the rotating anode do not change when the rotating anode is turned. The two sides of the rotary anode are therefore equivalent.
  • the rotary anode also has a
  • the mounting portion is formed centrally on the body in the region of the axis of rotation and allows a detachable, non-rotatable mounting of the rotary anode to an anode shaft, via which the rotational movement of a rotor on the
  • Rotary anode is transmitted.
  • For non-rotatable mounting are the usual, known in the art rotationally fixed positive and / or non-positive
  • Embodiments have in common that the rotary anode can be attached to both sides of the anode shaft.
  • the main body of the rotary anode has a central
  • Mounting section are then formed in its cross section as a negative impression of the polygonal cross-section.
  • cross sections and non-rotationally symmetric shapes such as elliptical cross sections are conceivable.
  • a sleeve-like projection is formed on the rotary anode in the region of the axis of rotation on both sides in each case, which protrudes in the axial direction from the rotary anode and the anode shaft concentric includes. This two-sided projection extends the passage opening and thereby causes an improved radial bearing of the rotary anode.
  • Screw for example, a screwed nut, attached and secured.
  • the rotary anode in the center on both sides each having an opening for receiving a free end of the anode shaft, wherein the openings each have an internal thread and the anode shaft is provided with a corresponding external thread.
  • the internal thread is oriented such that the screw connection between
  • Rotary anode and anode shaft in the direction of rotation of the rotary anode can be tightened and thereby unwanted release of the rotary anode is prevented during operation.
  • the two lateral openings on the main body of the rotary anode can meet in the middle of the rotary anode and therefore be designed as a continuous opening.
  • the screwed, free end of the anode shaft then protrudes through the body through and can be replaced by an additional
  • Screw for example, a screwed union nut to be additionally secured.
  • the mounting portion it is also conceivable that only the free end of the shaft, for example in the form of a flange or a shoulder-shaped shoulder rests on one side of the body and is attached to the body, for example by means of screw. This can be done on both sides of the main body in the area of
  • Mounting section respectively threaded openings for receiving
  • an opening or passage opening through the main body of the rotary anode for receiving an anode shaft is not required.
  • the mounting portion may be formed centrally on both sides of the rotary anode in each case a projecting stem, to which the anode shaft is releasably fastened.
  • the stalk can with the Basic body to be connected by means of soldering or welding.
  • the stem may be forged to the base body.
  • a first recess on the first side and a second recess on the second side, each with an at least partially planar base surface provided on the base body in the region of the mounting portion, on the one hand have a reduction in the moment of inertia of the rotary anode result and on the other hand a flat support surface for a non-rotatable positive and / or non-positive fastening of the anode shaft provide.
  • a radiant body which is connected in a planar manner to the main body is made of a material with high thermal conductivity, such as graphite.
  • Radiator supports the heat dissipation of the rotary anode and is
  • X-ray generation known materials such as in particular tungsten or tungsten alloys, in particular tungsten-rhenium alloys in question. So that the radiation characteristic of the rotary anode does not change when the active focal point side is changed, the same material is preferably selected for the first and second focal track coverings. Typically, the thickness of the track coatings in the range of 0.2 to 2 mm.
  • Suitable materials for the main body of the rotary anode are in particular molybdenum and molybdenum-based alloys (eg TZM, MHC), tungsten or tungsten-based alloys and a copper-based alloy. Under a molybdenum-based, tungsten-based or copper-based alloy reference is made to an alloy that is at least
  • molybdenum As MHC will be in this
  • the base body may also comprise a tungsten-copper composite, a copper composite, a particle-reinforced copper alloy, a particle-reinforced aluminum alloy, or graphite.
  • FIG. 1 shows a plan view of a first embodiment of the rotary anode
  • FIG. 2 shows a sectional view of the rotary anode of FIG. 1 along the
  • FIG. 3 is an axonometric view of the rotary anode of FIG. 1;
  • FIG. 4 shows a plan view of a second embodiment of the rotary anode
  • FIG. 5 shows a sectional view of the rotary anode of FIG. 4 along the
  • Fig. 7 is a plan view of a third embodiment of the rotary anode
  • FIG. 8 is a sectional view of the rotary anode of FIG. 7 along the
  • FIG. 9 is an axonometric view of the rotary anode of FIG. 7; FIG.
  • FIG. 10 is a plan view of a rotary anode of the first embodiment with an anode shaft attached thereto;
  • FIG. 11 is a sectional view of the rotary anode of FIG. 10 together
  • FIG. 12 shows an axonometric view of the rotary anode of FIG. 10.
  • FIGS. 1 to 12 various embodiments of the rotary anode are shown, wherein the rotary anode is designated in each case by the reference numeral 11.
  • FIGS. 1 to 3 show a first embodiment
  • FIGS. 4 to 7 show a second embodiment
  • FIGS. 8 to 10 show a third embodiment of the rotary anode according to the invention.
  • the rotary anode according to the first embodiment is additionally depicted with an anode shaft 13, on which the rotary anode 11 can be mounted on both sides.
  • the rotary anode 11 shown in the various figures comprises a disc-shaped main body 15 with a first side 17 and a second side 19 opposite the first side 17.
  • the main body is a rotationally symmetrical body and has an axis of rotation 21.
  • the disc of the base body 15 is flattened outwardly and therefore has the shape of a circular disc with beveled, hanging
  • a mounting portion 23 is formed on the base body 15, on which the rotary anode 11 can be detachably and rotationally fixed to the anode shaft 13.
  • the main body 15 including the mounting portion 23 is symmetrical with respect to a plane of symmetry 25 which is oriented normal to the rotation axis 21.
  • first and second focal-path coverings 27a, 27b are applied in the region of the chamfered shoulders 22.
  • the Brennbahnbeläge 27a, 27b are annular to the
  • the focal track pads 27a, 27b are arranged symmetrically with respect to the plane of symmetry 25.
  • the kerf linings 27a, 27b extend over the entire surface of the tapered shoulders 22.
  • the kerf linings 27a, 27b are
  • the rotary anode 11 is symmetrical overall with respect to the plane of symmetry 25 and the two sides 17,19 of the rotary anode are in terms of their properties for
  • the configuration of the mounting portion 23 allows the
  • Main body 15 can be attached to both sides of the anode shaft 13 and from the anode shaft 13 is also releasable. In the operation of the X-ray device, electrons are accelerated to the rotary anode and hit the
  • the rotary anode 11 can be turned by 180 °.
  • the previously unused Brennbahnbelag on the other side is now used and is the active focal point coating on which the electron beam to generate the X-rays incident.
  • the rotary anode 11 according to the invention is therefore after wear of the first
  • the rotary anode 11 according to the invention has about twice as long life as a rotary anode of the prior art.
  • the main body 15 has a passage opening 29 for receiving an anode shaft 13.
  • Rotary anode is attachable to both sides of the anode shaft 13. To the passage opening 29 then is on both sides of a first or
  • second recess 31a, 31b formed with a flat base.
  • FIGS. 10 to 12 show the rotary anode 11 in conjunction with the anode shaft 13.
  • a collar 33 is formed, which rests on the main body of the rotary anode and is at least partially received in the recess 31a or 31b.
  • the free end of the anode shaft 13 is passed through the through hole 29.
  • the remaining end of the anode shaft, which protrudes from the through hole 29, has an external thread 35 on which a cap nut 37 can be screwed, whereby a non-positive connection between the rotary anode 11 and anode shaft 13 can be made.
  • the union nut 37 is at least partially received in the recess 31a or 31b. To change the focal point side of the rotary anode 11, the union nut 37 is unscrewed, the rotary anode 11 of the
  • a union nut 37 may be provided.
  • the thread is oriented such that the screw in the direction of rotation of the
  • the third embodiment shown in FIGS. 7 to 9 offers a
  • Rotary anode 11 and the anode shaft 13 At the through hole 29, a cam groove 41 is formed, which can cooperate with a provided on the anode shaft 13 spring. Through Mit Economicsut 41 and spring a reliable rotationally fixed connection between the rotary anode 11 and anode shaft 13 is given.
  • the rotary anode can be secured by a union nut 37 described above.

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  • X-Ray Techniques (AREA)

Abstract

L'invention concerne une anode tournante servant à générer un rayonnement X, comprenant un corps de base qui présente une première face et une deuxième face opposée à cette dernière. Au moins une première couche faisant office de couronne focale est disposée sur les deux faces du corps de base et au moins une deuxième couche faisant office de couronne focale est disposée sur la deuxième face du corps de base. En outre, une partie de montage, servant à fixer le corps de base sur un axe d'anode, est formée sur le corps de base de l'anode tournante dans la zone de l'axe de rotation de cette dernière. La partie de montage permet de fixer l'anode tournante, au niveau de ses deux faces, sur l'axe d'anode.
PCT/AT2016/000049 2015-05-08 2016-05-02 Anode tournante utilisable sur deux faces WO2016179614A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM112/2015 2015-05-08
ATGM112/2015U AT14990U1 (de) 2015-05-08 2015-05-08 Beidseitig verwendbare Drehanode

Publications (1)

Publication Number Publication Date
WO2016179614A1 true WO2016179614A1 (fr) 2016-11-17

Family

ID=57123309

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2016/000049 WO2016179614A1 (fr) 2015-05-08 2016-05-02 Anode tournante utilisable sur deux faces

Country Status (2)

Country Link
AT (1) AT14990U1 (fr)
WO (1) WO2016179614A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2815370A1 (de) * 1978-04-10 1979-10-18 Siemens Ag Drehanode fuer roentgenroehren
DE2409526C2 (de) * 1973-03-02 1984-10-04 General Electric Co., Schenectady, N.Y. Drehanodenscheibe für eine Röntgenröhre
FR2695510A1 (fr) * 1992-09-04 1994-03-11 Gen Electric Cgr Procédé de réalisation d'une anode creuse pour tube à rayons X et anode ainsi réalisée.
WO2009022292A2 (fr) * 2007-08-16 2009-02-19 Philips Intellectual Property & Standards Gmbh Agencement hybride d'une structure de disque d'anode pour des configurations de tube à rayons x à puissance élevée du type anode rotative
WO2013104008A1 (fr) * 2012-01-09 2013-07-18 Plansee Se Anode tournante pour tube à rayons x présentant une structure en boucle orientée radialement au moins en partie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2409526C2 (de) * 1973-03-02 1984-10-04 General Electric Co., Schenectady, N.Y. Drehanodenscheibe für eine Röntgenröhre
DE2815370A1 (de) * 1978-04-10 1979-10-18 Siemens Ag Drehanode fuer roentgenroehren
FR2695510A1 (fr) * 1992-09-04 1994-03-11 Gen Electric Cgr Procédé de réalisation d'une anode creuse pour tube à rayons X et anode ainsi réalisée.
WO2009022292A2 (fr) * 2007-08-16 2009-02-19 Philips Intellectual Property & Standards Gmbh Agencement hybride d'une structure de disque d'anode pour des configurations de tube à rayons x à puissance élevée du type anode rotative
WO2013104008A1 (fr) * 2012-01-09 2013-07-18 Plansee Se Anode tournante pour tube à rayons x présentant une structure en boucle orientée radialement au moins en partie

Also Published As

Publication number Publication date
AT14990U1 (de) 2016-10-15

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