EP0151878B1 - Anticathode tournante pour tube à rayons X - Google Patents

Anticathode tournante pour tube à rayons X Download PDF

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Publication number
EP0151878B1
EP0151878B1 EP84308700A EP84308700A EP0151878B1 EP 0151878 B1 EP0151878 B1 EP 0151878B1 EP 84308700 A EP84308700 A EP 84308700A EP 84308700 A EP84308700 A EP 84308700A EP 0151878 B1 EP0151878 B1 EP 0151878B1
Authority
EP
European Patent Office
Prior art keywords
rotating
anode
ray tube
chamber
shielding wall
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
EP84308700A
Other languages
German (de)
English (en)
Other versions
EP0151878A1 (fr
Inventor
Kenichi Takahara
Hajime Sudo
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Publication of EP0151878A1 publication Critical patent/EP0151878A1/fr
Application granted granted Critical
Publication of EP0151878B1 publication Critical patent/EP0151878B1/fr
Expired 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
    • H01J35/16—Vessels; Containers; Shields associated therewith
    • 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
    • H01J35/1017—Bearings for rotating anodes
    • H01J35/103—Magnetic bearings

Definitions

  • the present invention relates to a rotating anode X-ray tube, and more specifically to a rotating anode X-ray tube in which a rotating shaft rotated together with its rotating anode is supported by a magnetic bearing.
  • thermions emitted from a cathode are caused to strike against the target surface of a rotating anode so that the energy of the thermions is . discharged as X-rays.
  • the substantial target surface area of the rotating anode struck by thermions can be made wider than that of a stationary anode of a stationary-anode tube, so that heat load applied to the rotating anode can be reduced.
  • the rotating anode should preferably be rotated as fast as possible.
  • the inside of the X-ray tube is kept at a vacuum, so that the mechanical bearing cannot be effectively supplied with lubricating oil.
  • the amount of heat applied to the mechanical bearing will increase.
  • the amount of heat on the rotating anode may be smaller than that applied to the stationary anode of the stationary-anode tube, the target surface of the rotating anode is heated to more than a thpusand degrees centigrade during use.
  • the mechanical bearing of the stationary-anode tube will be heated further due to the external factor of heat being conducted from the target surface of the rotating anode.
  • a rotating-anode X-ray tube in which a magnetic bearing is used in place of the mechanical bearing, whereby the rotating shaft of the rotating anode is supported uncontacted.
  • the magnetic bearing can support the rotating shaft uncontacted in its axial and radial directions, so that only a very small amount of heat is generated from the magnetic bearing during use. Therefore, the amount of heat applied to the magnetic bearing can be greatly reduced.
  • the magnetic bearing has many advantages in a vacuum, the rotating shaft can be rotated faster by a magnetic bearing than in the case where the rotating shaft is supported by the mechanical bearing.
  • the rotating-anode X-ray tube using the mechanical bearing has inevitable drawbacks.
  • the magnetic bearing is provided with position detectors for detecting the axial and radial displacement of the rotating shaft.
  • Magnetic sensors are generally used as position detectors. Basically, the magnetic sensors electromagnetically detect the displacement of the rotating shaft, so that their outputs may greatly be influenced by X-rays or other electromagnetic waves. Also, samarium-cobalt or other rare-earth magnets used in the magnetic bearing will deteriorate if exposed to X-rays or other electromagnetic waves.
  • a magnetic bearing supported, rotating anode, evacuated X-ray tube is disclosed in EP 71456 A1, the bearing including magnetic sensors and permanent magnets.
  • GB 1557338 discloses an X-ray rotating-anode magnetic tube in accordance with the pre-characterising part of claim 1.
  • the object of the present invention is to provide a rotating-anode X-ray tube capable of alleviating the bad influences of heat and electromagnetic waves from the rotating anode on the driving members for rotating the rotating anode, thereby ensuring stable rotation of the rotating anode.
  • a rotating-anode X-ray tube comprising a housing provided at one end side thereof with an X-ray radiating window for transmitting X-rays therethrough, a cathode disposed in the housing on one end side thereof, a rotating anode rotatably disposed close to the cathode in the housing and adapted to emit X-rays when struck by thermions radiated from the cathode.
  • the X-rays from the rotating anode being radiated from the housing through the X-ray radiating window, and driving means disposed in the housing on the other end side thereof, whereby the rotating anode is rotated, the rotating anode being connected to one end of a shaft, a shielding wall arranged in the housing for dividing the inside space of the housing into a first chamber containing the cathode and the rotating anode and a second chamber containing the driving means, said shaft extending through a hole formed in the shielding wall characterized by further comprising at least two mechanical bearings arranged separately from each other and coaxially with the shaft for supporting the shaft in case of emergency, one of said at least two bearings being arranged in the hole of the shielding wall for closing the same, whereby the first chamber is thermally shielded by the shielding wall and said one of the bearings.
  • heat radiated from the rotating anode may be intercepted by the shielding means, preventing the driving means from being heated by the heat from the rotating anode, that is, the amount of heat from the driving means can greatly be reduced.
  • the shielding means can also intercept X-rays from the rotating anode which are to be applied to the magnetic sensors and rare-earth magnets of the magnetic bearing.
  • the magnetic bearing can stably support the rotating shaft, i.e., the rotating anode.
  • the rotating-anode X-ray tube is provided with a hollow cylindrical vacuum housing 10.
  • the vacuum housing 10 comprises first and second metallic shells 12 and 14 each opening at one end.
  • the first and second shells 12 and 14 are airtightly coupled by means of a plurality of connecting screws 20 so that flange portions 16 and 18 formed on the respective open ends of the first and second shells 12 and 14 are joined together.
  • An exhaust tube (not shown in Fig. 1) is connected to the vacuum housing 10.
  • the exhaust tube is connected to, e.g., a vacuum pump, and is sealed after the vacuum housing 10 is evacuated to a predetermined degree of vacuum.
  • the vacuum housing 10 is made of metal. Alternatively, however, it may be formed of glass.
  • a cathode 22 having a tungsten coil filament and focusing electrodes (not shown) is disposed close to the peripheral wall of the first shell 12.
  • the cathode 22 is electrically connected to and supported by a stem 24.
  • the stem 24 first extends inward from the cathode 22 in the radial direction of the first shell 12, and is then bent to extend along the axis of the first shell 12.
  • the upper end of the stem 24 penetrates the closed end wall of the first shell 12 in an airtight manner to extend to the outside.
  • a rotating anode 26 in the form of a flat, circular truncated cone is disposed coaxially with the first shell 12 facing the cathode 22.
  • the rotating anode 26 is formed of tungsten, and the tapered peripheral surface of the rotating anode 26 defines what is called the target surface 28 which is struck by thermions emitted from the cathode 22.
  • the angle between the target surface 28 of the rotating anode 26 and the axis of the first shell 12 is set so that X-rays produced when the thermions from the cathode strike against the target surface 28 are radiated through a glass X-ray window 30 which is attached to the peripheral wall of the first shell 12.
  • the rotating anode 26 is connected to a supporting shaft 32 made of, e.g., molybdenum.
  • the supporting shaft 32 which is coaxial with the first shell 12 or the vacuum housing 10, extends into the second shell 14 through an opening in a shielding wall 34 which divides the inside space of the vacuum housing 10 in two.
  • the shielding wall 34 is fitted in an annular groove 36 which is defined by a pair of step portions formed along the joined inner peripheries of the respective open ends of the first and second housing shells 12 and 14. Thus, when the first and second shells 12 and 14 are coupled together in the aforesaid manner, the shielding wall 34 is fixed between the first and second shells 12 and 14.
  • the shielding wall 34 is formed of a highly conductive material with a high thermal reflection factor.
  • the shielding wall 34 may be formed by a coating plate made of tungsten, molybdenum or another conductive material with a high thermal-reflection material.
  • the shielding wall 34 is grounded through the vacuum housing 10. Thus, the respective insides of the first and second shells 12 and 14 are thermally and electromagnetically shielded from each other.
  • the shaft 32 of the rotating anode 26 extending into the second shell 14 is coupled to a rotating cylinder 40 of a rotating mechanism 38.
  • a hollow intermediate cylinder portion 14b coaxial with an outer peripheral wall 14a of the second shell 14 protrudes from the closed end wall of the second shell 14 toward the first shell 12.
  • a hollow inner cylinder portion 14c coaxial with the intermediate cylinder portion 14b protrudes inward from the end wall of the intermediate cylinder portion 14b near the first shell 12.
  • the second shell 14 has a triple-wall structure, as shown in Fig, 1.
  • the rotating cylinder 40 is in the form of a hollow cylinder opened at one end, and is contained in an annular space defined between the outer peripheral wall 14a and the intermediate cylinder portion 14b of the second shell 14, allowing a radial clearance in the space,
  • the shaft 32 of the rotating anode 26 is supported on the end wall of the rotating cylinder 40 beside the shielding wall 34 by means of an electric insulating member 42, axially extending in the inner cylinder portion 14c.
  • mechanical bearings 44 of a contact type are arranged at an axial interval on the inner peripheral surface of the inner cylinder portion 14c.
  • the bearings 44 which are not in contact with the supporting shaft 32 in the normal operating state, serve to support the supporting shaft 32 in case of an emergency.
  • a contact pin 90 protrudes downward from the lower end (Fig. 1) of the supporting shaft 32.
  • a contact plate 92 which cooperates with the contact pin 90 is disposed inside the inner cylinder portion 14c, axially spaced from the contact pin 90.
  • the contact plate 92 is electrically connected to a conductive rod 94 which penetrates the bottom wall of the inner cylinder portion 14c in an airtight manner,
  • the conductive rod 94 and the stem 24 of the cathode 22 are electrically connected to a power source for applying a predetermined voltage between the rotating anode 26 and the cathode 22.
  • the second shell 14 is covered by an outer housing portion 50 of the rotating mechanism 38 with an annular gap between them.
  • a stator 54 of an induction motor 52 is attached to the inside of the peripheral wall of the outer housing portion 50.
  • the armature coil of the stator 54 is electrically connected to a power source (not shown) to drive a motor.
  • a rotor 56 of the motor 52 is fixed to the outer peripheral surface of the rotating cylinder 40 so as to face the stator 54.
  • the rotating cylinder 40 which is contained in the annular space between the outer peripheral wall 14a and the intermediate cylinder portion 14b of the second shell 14 with the radial clearance, as stated before, is supported in the radial direction by a magnetic bearing 60 so that it is neither in contact with the outer peripheral wall 14a of the second shell 14 nor with the outer peripheral surface of the intermediate cylinder portion 14b.
  • the rotating cylinder 40 is supported uncontacted also in the axial direction.
  • the magnetic bearing 60 is provided with a yoke 62 which is fitted in a space defined between the inner peripheral surface of the intermediate cylinder portion 14b and the outer peripheral surface of the inner cylinder portion 14c.
  • the yoke 62 is made of, e.g., a magnetic material, and, generally, is in the form of a hollow cylinder which is formed by joining rings with an inside diameter equal to the outside diameter of the inner cylinder portion 14c.
  • Four magnetic poles 64a, 64b, 64c and 64d, and 66a, 66b, 66c and 66d protrude radially outward from each of the upper and lower end portions (Fig. 1) of the yoke 62, respectively.
  • Fig. 1 the upper and lower end portions
  • FIG. 2 shows the magnetic poles 64a to 64d at the upper end of the yoke 62. Since the magnetic poles at the upper and lower ends of the yoke 62 have the same construction, only the upper magnetic poles 64a to 64d will be described in detail.
  • the magnetic poles 64a to 64d are arranged at rectangular intervals along the circumference.
  • the outside diameter measured between the peripheral surfaces of the two opposite magnetic poles 64a and 64c or between those of the other two magnetic poles 64b and 64d is equal to the inside diameter of the intermediate cylinder 14b.
  • Conductive coils 80 are individually wound around the magnetic poles 64a to 64d.
  • a radially projecting ring-shaped magnetic pole 68 is formed on the central portion of the yoke 62 between the magnetic poles 64 and 66 at the upper and lower ends, The outside diameter of the magnetic pole 68 is equal to the inside diameter of the intermediate cylinder portion 14b.
  • a pair of ring-shaped conductive coils 70a and 70b is wound around the outer peripheral surface of the yoke 62 so as to hold the magnetic pole 68 between the two coils 70a and 70b along the axial direction of the yoke 62.
  • the conductive coils 80, 70a and 70b are electrically connected to a power source (not shown).
  • Ring-shaped permanent magnets 72 and 74 are fixed on the yoke 62 located between the magnetic poles 64 and 68, and between the magnetic poles 68 and 66, respectively.
  • the permanent magnets 72 and 74 are magnetized in the radial direction.
  • Annular grooves are formed in the inner peripheral surface of the intermediate cylinder portion 14b, corresponding to the regions between the magnetic poles 64 and the conductive coil 70a, and between the conductive coil 70b and the magnetic poles 66, individually.
  • Laminated magnetic rings 76 and 78 with high permeability are fixedly fitted in the annular grooves, individually.
  • a plurality of displacement sensors 82 for detecting the radial displacement of the rotating cylinder 40 is fixed to the inside of the peripheral wall of the outer housing portion 50, facing the magnetic poles 64a to 64d and 66a to 66d.
  • magnetic sensors are used for the displacement sensors 82 which convert the radial displacement of the rotating cylinder 40 into a quantity of electricity.
  • a plurality of magnetic sensors 84 similar to the sensors 82 and adapted to detect the axial displacement of the rotating cylinder 40 is fixed to the lower portion (Fig. 1) of the inner peripheral surface of the outer housing portion 50.
  • the output ends of the magnetic sensors 82 and 84 are electrically connected to a stabilization control circuit (not shown) which controls the values of currents supplied to the conductive coils 80, 70a and 70b.
  • the stabilization control circuit naturally includes the power source for the conductive coils 80, 70a and 70b.
  • magnetic fluxes delivered from the one permanent magnet 72 form a magnetic circuit M1 which corresponds to a loop connecting the permanent magnet 72, the magnetic ring 76, the magnetic poles 64, and the yoke 62; and a magnetic circuit M2 which corresponds to a loop connecting the permanent magnet 72, the magnetic ring 76, the magnetic pole 68, and the yoke 62,
  • magnetic fluxes delivered from the other permanent magnet 74 form a magnetic circuit M3 which corresponds to a loop connecting the permanent magnet 74, the magnetic ring 78, the magnetic pole 68, and the yoke 62; and a magnetic circuit M4 which corresponds to a loop connecting the permanent magnet 74, the magnetic ring 78, the magnetic poles 66, and the yoke 62.
  • magnetic circuits M1 to M4 are shown by broken lines, respectively. Please note that they are shown only on the right side in the figure for convenience's sake.
  • the rotating cylinder 40 is supported uncontacted in both radial and axial directions by the magnetic forces of the magnetic circuits MI to M4 of the magnetic bearing 60 controlled by adjusting the current supplied to the conductive coils 80, 70a and 70b, If the stator 54 of the motor 52 is energized in this state, the rotor 56 of the motor 52 or the rotating cylinder 40 is rotated uncontacted in the radial and axial directions.
  • the magnetic sensors 82 can detect the radial displacement of the rotating cylinder 40.
  • the radial deviation of the rotating cylinder 40 can be corrected to align the axis of the rotating cylinder 40 with that of the vacuum housing 10 by controlling the amount of current flowing through the conductive coils 80 on the magnetic poles 64 and 66 to properly vary the magnetic forces of the magnetic circuits M1 and M4 of the magnetic bearing 60 by means of the stabilization control circuit in accordance with output signals from the magnetic sensors 82.
  • the rotating cylinder 40 can stably be supported uncontacted in the radial direction.
  • the rotating cylinder 40 While the rotating cylinder 40 is being rotated while it is stably supported in the radial direction, it can be moved downward (Fig. 1) by the force of attraction by controlling the current supplied to the conductive coils 70a and 70b of the magnetic bearing 60 which in turn varies the magnetic forces from the magnetic circuits M2 and M3, that is, by increasing the magnetic force of the magnetic circuit M3.
  • the supporting shaft 32 of the rotating anode 26 supported by the rotating cylinder 40 is also moved downward, so that the contact pin 90 of the supporting shaft 32 abuts against the contact plate 92 to be electrically connected therewith.
  • a predetermined electric potential difference is caused between the cathode 22 and the rotating anode 26, so that thermions emitted from the filament of the cathode 22 are accelerated to strike against the target surface 28 of the rotating anode 26.
  • X-rays produced by the collision of the thermions are radiated from the target surface 28 of the rotating anode 26 toward the X-ray window 30 of the first shell 12, and are discharged to the outside through the X-ray window 30.
  • the magnetic sensors 84 can detect the axial displacement of the rotating cylinder 40 from the position where the contact pin 90 and the contact plate 92 are electrically connected.
  • the axial displacement or deviation can be corrected by suitably controlling the current supplied to the conductive coils 70a and 70b in accordance with the output signals from the magnetic sensors 84,
  • the electrical connection between the contact pin 90 and the contact plate 92 is prevented from being unexpectedly cut off.
  • the contact pin 90 is prevented from being unduly pressed against the contact plate 92 with excessive force,
  • the connection or disconnection between the contact pin 90 and the contact plate 92 is controlled by controlling the current supply to the conductive coils 70a and 70b.
  • the support of the rotating cylinder 40 by the magnetic bearing 60 will never be adversely affected by heat or X-rays radiated from the rotating anode 26.
  • Part of the X-rays emitted from the target surface 28 of the rotating anode 26 are normally scattered within the first shell 12 without being radiated through the X-ray window 30.
  • the first and second shell 12 and 14 are divided by the conductive shielding wall 34, the scattered X-rays moving from the first shell 12 into the second shell 14 can effectively be absorbed by the shielding wall 34, Accordingly, the magnetic sensors 82 and 84 of the magnetic bearing 60 will never be exposed to X-rays, and so their outputs are protected against the adverse effects of X-rays.
  • the rotating cylinder 40 can stably be supported in the radial and axial directions by the magnetic bearing 60.
  • the shielding wall 34 is coated with a material with a high thermal reflection factor, the heat radiated from the rotating anode 26 is intercepted by the shielding wall 34, In other words, the shielding wall 34 can restrain the magnetic bearing 60 in the second shell 14 from being heated by the heat radiated from the rotating anode 26, so that the increase of the temperature of the magnetic bearing 60 can be minimized to reduce the heat load on the magnetic bearing 60.
  • Fig. 3 there is shown an embodiment of the invention.
  • one of the mechanical bearings 44 is attached to the shielding wall 34.
  • the axial dimension or length of the supporting shaft 32 can be shortened without changing the axial distance between the two mechanical bearings 44,
  • the supporting shaft 32 can more securely be supported in an emergency, and besides, the inner cylinder portion 14c can be axially shortened due to the reduction in size of the supporting shaft 32.
  • the inner cylinder portion 14c places no restrictions on the inside diameter of the yoke 62.
  • the inside and outside diameters of the yoke 62, and hence the diameter of the whole X-ray tube, can be made smaller than those of the yoke shown in Fig. 1.
  • the shielding wall 34 has both thermal and electromagnetic screening functions If a mechanical bearing is used in place of the magnetic bearing 60, however, the shielding wall 34 need have only the thermal shielding function.

Landscapes

  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Claims (8)

1. Tube radiographique à anode rotative comprenant un boîtier (10) muni, du côté d'une première extrémité, d'une fenêtre radiographique (30) destinée à émettre des rayons X, une cathode (22) disposée dans le boîtier du côté d'une première extrémité de celui-ci, une anode rotative (26) disposée près de la cathode (22) afin qu'elle puisse tourner dans le boîtier (10) et destinée à émettre des rayons X lorsqu'elle est frappée par des thermions émis par la cathode (22), les rayons X provenant de l'anode rotative (26) étant émis par le boîtier par l'intermédiaire de la fenêtre radiographique, et un dispositif d'entraînement placé dans le boîtier du côté de son autre extrémité, si bien que l'anode rotative est entraînée en rotation, l'anode rotative (26) étant connectée à une première extrémité d'un arbre (32), une paroi protectrice (34) disposée dans le boîtier et destinée à séparer l'espace interne du boîtier en une première chambre contenant la cathode et l'anode rotative et une seconde chambre contenant le dispositif d'entraînement, l'arbre (32) passant par un trou formé dans la paroi protectrice (34), caractérisé en ce qu'il comprend en outre au moins deux paliers mécaniques (44) disposés séparément l'un de l'autre et coaxialement à l'arbre (32) de manière qu'ils supportent l'arbre (32) en cas d'urgence, l'un des deux paliers au moins (44) étant disposé dans le trou de la paroi protectrice (34) afin qu'il ferme celui-ci, si bien que la première chambre est protégée'thermiquement par la paroi protectrice (34) et le premier palier (44).
2. Tube radiographique à anode rotative selon la revendication 1, dans lequel la première chambre est protégée électromagnétiquement par rapport à la seconde chambre par le dispositif protecteur.
3. Tube radiographique à anode rotative selon la revendication 1 ou 2, caractérisé en ce que le dispositif d'entraînement comporte un arbre rotatif (40) supportant l'anode rotative, un ensemble à moteur électrique (52) destiné à faire tourner l'arbre rotatif, et un palier magnétique (60) destiné à supporter l'arbre rotatif afin qu'il ne présente pas de contact dans les directions radiales et axiales.
4. Tube radiographique à anode rotative selon la revendication 3, caractérisé en ce que la paroi protectrice (34) est formée d'un matériau tel que la chaleur émise par l'anode rotative ne peut pas être transmise à l'intérieur de la seconde chambre par absorption thermique et conduction de la chaleur par le matériau.
5. Tube radiographique à anode rotative selon la revendication 3 ou 4, caractérisé en ce que la paroi protectrice (34) a une surface formée de manière que la chaleur émise par l'anode rotative ne puisse pas être transmise à l'intérieur de la seconde chambre par réflexion thermique par cette surface.
6. Tube radiographique à anode rotative selon les revendications 3 à 5, caractérisé en ce que la surface de la paroi protectrice du côté de la première chambre est couverte d'un matériau tel que la chaleur émise par l'anode rotative ne peut pas être transmise vers l'intérieur de la seconde chambre, par réflexion de la chaleur par ledit matériau.
7. Tube radiographique à anode rotative selon la revendication 4, caractérisé en ce que la paroi protectrice (34) est conductrice de l'électricité.
8. Tube radiographique à anode rotative selon la revendication 4, caractérisé en ce que la paroi protectrice (34) est formée par revêtement au moins de la surface d'une plaque formée d'un matériau conducteur de l'électricité qui est tournée vers la première chambre, avec un matériau tel que la chaleur émise par l'anode rotative ne peut pas être transmise à l'intérieur de la seconde chambre par réflexion de la chaleur par ledit matériau.
EP84308700A 1984-02-03 1984-12-13 Anticathode tournante pour tube à rayons X Expired EP0151878B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1778784A JPS60163355A (ja) 1984-02-03 1984-02-03 Ｘ線管装置
JP17787/84 1984-02-03

Publications (2)

Publication Number Publication Date
EP0151878A1 EP0151878A1 (fr) 1985-08-21
EP0151878B1 true EP0151878B1 (fr) 1989-08-02

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EP84308700A Expired EP0151878B1 (fr) 1984-02-03 1984-12-13 Anticathode tournante pour tube à rayons X

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EP (1) EP0151878B1 (fr)
JP (1) JPS60163355A (fr)
DE (1) DE3479268D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2626108B1 (fr) * 1988-01-18 1990-05-04 Thomson Cgr Tube a rayons x a anode tournante comportant un dispositif d'ecoulement du courant anodique
JPH04118841A (ja) * 1990-05-16 1992-04-20 Toshiba Corp 回転陽極ｘ線管およびその製造方法
FR2675630B1 (fr) * 1991-04-17 1993-07-16 Gen Electric Cgr Dispositif de blindage d'un stator de moteur pour anode tournante de tube a rayons x.
US8385505B2 (en) 2009-06-19 2013-02-26 Varian Medical Systems, Inc. X-ray tube bearing assembly
DE102014204112A1 (de) * 2014-03-06 2015-09-10 Siemens Aktiengesellschaft Röntgenröhre
JP6558908B2 (ja) * 2015-02-09 2019-08-14 株式会社大阪真空機器製作所 Ｘ線発生装置用ターゲットマウントおよびこれを備えたｘ線発生装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2338578A1 (fr) * 1976-01-16 1977-08-12 Philips Nv Tube de rontgen a anode rotative supportee par voie magnetique
FR2439476A1 (fr) * 1978-10-16 1980-05-16 Philips Nv Tube de rontgen muni d'une anode rotative
FR2456383A1 (fr) * 1979-05-08 1980-12-05 Philips Nv Tube de rontgen a anode rotative supportee axialement par un palier magnetique et radialement par un palier lisse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3116169A1 (de) * 1981-04-23 1982-11-11 Philips Patentverwaltung Gmbh, 2000 Hamburg Hochspannungs-vakuumroehre, insbesondere roentgenroehre
JPS5819844A (ja) * 1981-07-30 1983-02-05 Toshiba Corp 回転陽極ｘ線管用磁気軸受装置
DE3233064A1 (de) * 1982-09-06 1984-03-08 Siemens AG, 1000 Berlin und 8000 München Drehanoden-roentgenroehre

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2338578A1 (fr) * 1976-01-16 1977-08-12 Philips Nv Tube de rontgen a anode rotative supportee par voie magnetique
FR2439476A1 (fr) * 1978-10-16 1980-05-16 Philips Nv Tube de rontgen muni d'une anode rotative
FR2456383A1 (fr) * 1979-05-08 1980-12-05 Philips Nv Tube de rontgen a anode rotative supportee axialement par un palier magnetique et radialement par un palier lisse

Also Published As

Publication number Publication date
DE3479268D1 (en) 1989-09-07
JPS60163355A (ja) 1985-08-26
EP0151878A1 (fr) 1985-08-21
JPH0372182B2 (fr) 1991-11-15

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