EP0430367B1 - X-ray tube - Google Patents
X-ray tube Download PDFInfo
- Publication number
- EP0430367B1 EP0430367B1 EP90203106A EP90203106A EP0430367B1 EP 0430367 B1 EP0430367 B1 EP 0430367B1 EP 90203106 A EP90203106 A EP 90203106A EP 90203106 A EP90203106 A EP 90203106A EP 0430367 B1 EP0430367 B1 EP 0430367B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- anode
- cooling medium
- ray tube
- bearing part
- 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
Links
Images
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
- H01J35/106—Active cooling, e.g. fluid flow, heat pipes
-
- 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 invention relates to an x-ray tube according to the preamble of claim 1.
- Such an X-ray tube is known from EP-A 293 791. It is a rotating anode X-ray tube, the inside of which is cooled by a rotating coolant. After it has passed the focal spot path, the coolant flows through a cavity in which there is a tube through which the coolant is supplied. The coolant flows in the space between the tube and the cavity to a fixed outlet opening. So that the speed of rotation of the coolant is reduced, a spiral-shaped coolant guide device is arranged on the outer surface of the tube, by means of which the coolant is forced to flow around the tube in a spiral.
- the object of the present invention is to design an X-ray tube of the type mentioned at the outset in such a way that good cooling also results on the lateral surfaces of the cylindrical cavity. This object is achieved by the measures specified in claim 1.
- the coolant guide device prevents the coolant flow in the space between the pipe and the inner surfaces of the anode body, which delimit the cylindrical cavity, run exclusively in the longitudinal direction of the tube, and forces the coolant to flow around the tube. This causes turbulence of the coolant flow on the inner surfaces, which results in improved cooling.
- the coolant flow can only pass through an opening in a pane in the area between this pane and the subsequent pane. Since the openings in successive disks are each offset by 180 ° (with respect to the longitudinal axis of the tube), the coolant flow must flow from opening to opening in an arc of 180 ° around the tube.
- the anode is a rotating anode, which is mounted by means of a bearing which has a rotating bearing part and a fixed bearing part, a liquid lubricant being located between the bearing parts, and that the fixed bearing part is open to the outside has cylindrical cavity in which the cooler is arranged.
- the described rotating anode X-ray tubes in particular those with a spiral groove bearing, show a temperature distribution during operation which requires effective cooling of the cylindrical outer surfaces of the cavity in the anode body.
- the rotary anode X-ray tube shown in FIG. 1 has a metal piston 1 to which the cathode is attached via a first insulator 2 and the rotary anode is attached via a second insulator 4.
- the rotating anode has an anode disk 5, on the surface of which is opposite the cathode 3, when a high voltage is switched on, X-ray radiation is generated, which emerges through a radiation exit window 6 in the bulb 1, which preferably consists of beryllium.
- the anode disc 1 is connected via a bearing arrangement to a carrier body 7 which is fastened to the second insulator 4.
- the bearing arrangement comprises a fixed bearing part 8 connected to the carrier 7 and a rotating bearing part 9 which has at its lower end a rotor 10 for driving the anode disk 5 fastened at the upper end.
- the bearing parts 8, 9 can consist of a molybdenum alloy (TZM).
- the bearing part 8 is provided with two herringbone groove patterns 11a, 11b which are offset with respect to one another in the axial direction.
- the grooves are, for example, 10 »m deep, and the areas of the grooves are, for example, in a ratio of 1: 1 to the areas in between.
- the space between the groove patterns 11a, 11b and the bearing part 9 is with a liquid lubricant filled, preferably a gallium alloy.
- the surfaces of the fixed bearing part 8 provided with the groove patterns 11a, 11b and the surfaces of the rotating bearing part 9 opposite them thus form two spiral groove bearings for absorbing the radial bearing forces.
- the bearing part has a section 12 several millimeters thick, the diameter of which is substantially larger than the diameter of the rest of the bearing part 8.
- a section whose diameter corresponds at least approximately to the diameter of the bearing part 8 in the upper region and which is connected to the carrier body 7.
- the inner contour of the bearing part 9 is adapted to the outer contour of the bearing part 8.
- the rotating bearing part 9 cannot be formed in one piece, as shown schematically in the drawing, but must consist of at least two parts which are connected to one another in a suitable manner in the region of section 12.
- the end faces of the section 12, which run perpendicular to the axis of rotation 16 of the bearing part 9, are also provided with a herringbone-like pattern (not shown in the drawing) and, together with the surfaces of the bearing part 9 parallel thereto, form two further spiral groove bearings, the forces directed axially upwards and downwards can record on the rotating anode.
- Fig. 2 shows the fixed bearing part 8 and the cooling device located therein.
- the bearing part 8 has a cavity with a circular cylindrical outer surface and a flat end surface perpendicular to the axis 16.
- the inside diameter of the cavity is e.g. 20mm.
- a cooler 14 which comprises a metal tube 141, which is provided on its outer surface with a number of disks 142, which are located in planes perpendicular to the axis of rotation 16 and whose outer diameter corresponds to the inner diameter of the opening 13 or at most a few is a tenth of a millimeter smaller than this.
- the cooler 14 has an opening 143 in the tube 141 at its end facing the end face of the fixed bearing part 8.
- each disk 142 has a slot-shaped opening 144 which extends in the radial direction, for example 3 mm wide. The openings are shown in the illustration in FIG. 2 alternately on the right or on the left side, so that the openings 144 in two successive disks are offset by 180 ° (with respect to the axis 16).
- a coolant supply line 17 is introduced, which is also made of metal and whose outer diameter is adapted to the inner diameter of section 145.
- the coolant flow which is indicated by the arrow 18, flows through the feed line 17 into the pipe 141 and emerges from the pipe through the opening 143 in the region of the end face of the bearing part 8.
- the emerging Coolant splits into two streams that flow in opposite directions in a semicircle until they reach the opening 144 in the first disc 142 on the opposite side of the pipe, where they combine and pass through the opening.
- the coolant would flow past the inner walls of the bearing part 8 to be cooled in the direction of the axis and essentially laminar.
- the cooling effect would be low.
- the disks create turbulence in the coolant flow, and the stronger the closer the disks are, the stronger. At these points, i.e. in the area of section 12, the strongest cooling effect results.
- the cooler itself does not directly serve to dissipate the heat, but rather that it forces a flow in the coolant flow which ensures good heat dissipation.
- the coolant supply line 17 can be arranged in the interior of a high-voltage plug, not shown, which is inserted into an opening in the ceramic insulator 4.
- the cooler 14 results between the above-mentioned high-voltage connector and the anode disk 5 via the supply line 17 , the bearing part 8, the Lubricant and the rotating bearing part 9 - an electrically conductive connection that can serve to connect the anode disk 5 to a positive high voltage.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- X-Ray Techniques (AREA)
- Sliding-Contact Bearings (AREA)
Description
Die Erfindung betrifft eine Röntgenröhre nach dem Oberbegriff des Anspruches 1.The invention relates to an x-ray tube according to the preamble of claim 1.
Eine derartige Röntgenröhre ist aus der EP-A 293 791 bekannt. Dabei handelt es sich um eine Drehanoden-Röntgenröhre, deren Inneres von einem mitrotierenden Kühlmittel gekühlt wird. Das Kühlmittel durchfließt, nachdem es an der Brennfleckbahn vorbei geleitet ist, einen Hohlraum, in dem sich ein Rohr befindet, durch welches das Kühlmittel zugeführt wird. Das Kühlmittel fließt in dem Zwischenraum zwischen dem Rohr und dem Hohlraum zu einer feststehenden Austrittsöffnung. Damit dabei die Rotationsgeschwindigkeit des Kühlmittels reduziert wird, ist auf der Außenfläche des Rohres eine spiralförmige Kühlmittelleitvorrichtung angeordnet, durch die erzwungen wird, daß das Kühlmittel das Rohr spiralförmig umströmt.Such an X-ray tube is known from EP-A 293 791. It is a rotating anode X-ray tube, the inside of which is cooled by a rotating coolant. After it has passed the focal spot path, the coolant flows through a cavity in which there is a tube through which the coolant is supplied. The coolant flows in the space between the tube and the cavity to a fixed outlet opening. So that the speed of rotation of the coolant is reduced, a spiral-shaped coolant guide device is arranged on the outer surface of the tube, by means of which the coolant is forced to flow around the tube in a spiral.
Aufgabe der vorliegenden Erfindung ist es, eine Röntgenröhre der eingangs genannten Art so auszugestalten, daß sich eine gute Kühlung auch an den Mantelflächen des zylinderförmigen Hohlraumes ergibt. Diese Aufgabe wird durch die im Anspruch 1 angegebenen Maßnahmen gelöst.The object of the present invention is to design an X-ray tube of the type mentioned at the outset in such a way that good cooling also results on the lateral surfaces of the cylindrical cavity. This object is achieved by the measures specified in claim 1.
Die Kühlmittelleitvorrichtung verhindert dabei, daß der Kühlmittelstrom in dem Zwischenraum zwischen dem Rohr und den Innenflächen des Anodenkörpers, die den zylinderförmigen Hohlraum begrenzen, ausschließlich in Längsrichtung des Rohres verläuft, und erzwingt, daß das Kühlmittel um das Rohr herum strömt. Dadurch werden an den Innenflächen Turbulenzen des Kühlmittelstroms hervorgerufen, woraus sich eine verbesserte Kühlung ergibt. Der Kühlmittelstrom kann jeweils nur durch eine Öffnung in einer Scheibe in den Bereich zwischen dieser Scheibe und der nachfolgenden Scheibe gelangen. Da die Öffnungen in aufeinanderfolgenden Scheiben jeweils um 180° (bezogen auf die Längsachse des Rohres) gegeneinander versetzt sind, muß der Kühlmittelstrom von Öffnung zu Öffnung in einem Bogen von 180° um das Rohr herum fließen.The coolant guide device prevents the coolant flow in the space between the pipe and the inner surfaces of the anode body, which delimit the cylindrical cavity, run exclusively in the longitudinal direction of the tube, and forces the coolant to flow around the tube. This causes turbulence of the coolant flow on the inner surfaces, which results in improved cooling. The coolant flow can only pass through an opening in a pane in the area between this pane and the subsequent pane. Since the openings in successive disks are each offset by 180 ° (with respect to the longitudinal axis of the tube), the coolant flow must flow from opening to opening in an arc of 180 ° around the tube.
Nach einer bevorzugten Weiterbildung ist vorgesehen, daß die Anode eine Drehanode ist, die mittels eines Lagers gelagert ist, das einen rotierenden Lagerteil und einen feststehenden Lagerteil aufweist, wobei sich zwischen den Lagerteilen ein flüssiges Schmiermittel befindet, und daß der feststehende Lagerteil einen nach außen offenen zylinderförmigen Hohlraum aufweist, in dem der Kühler angeordnet ist. Die beschriebenen Drehanoden-Röntgenröhren, insbesondere solche mit einem Spiralrillenlager, zeigen im Betrieb eine Temperaturverteilung, die eine wirksame Kühlung der zylindrischen Mantelflächen des Hohlraums in dem Anodenkörper erfordern.According to a preferred development, it is provided that the anode is a rotating anode, which is mounted by means of a bearing which has a rotating bearing part and a fixed bearing part, a liquid lubricant being located between the bearing parts, and that the fixed bearing part is open to the outside has cylindrical cavity in which the cooler is arranged. The described rotating anode X-ray tubes, in particular those with a spiral groove bearing, show a temperature distribution during operation which requires effective cooling of the cylindrical outer surfaces of the cavity in the anode body.
Die Erfindung wird nachstehend anhand der Zeichnung näher erläutert. Es zeigen
- Fig. 1 eine Röntgenröhre, bei der die Erfindung anwendbar ist,
- Fig. 2 die Anordnung der erfindungsgemäßen Kühlvorrichtung in einem Teil dieser Röntgenröhre und
- Fig. 3 eine Draufsicht auf den Kühler.
- 1 is an X-ray tube in which the invention is applicable,
- Fig. 2 shows the arrangement of the cooling device according to the invention in a part of this X-ray tube and
- Fig. 3 is a plan view of the cooler.
Die in Fig. 1 dargestellte Drehanoden-Röntgenröhre besitzt einen Metallkolben 1, an dem über einen ersten Isolator 2 die Kathode und über einen zweiten Isolator 4 die Drehanode befestigt ist. Die Drehanode besitzt eine Anodenscheibe 5, auf deren der Kathode 3 gegenüberliegender Fläche beim Einschalten einer Hochspannung Röntgenstrahlung erzeugt wird, die durch ein Strahlenaustrittsfenster 6 im Kolben 1, das vorzugsweise aus Beryllium besteht, austritt. Die Anodenscheibe 1 ist über eine Lageranordnung mit einem Trägerkörper 7 verbunden, der an den zweiten Isolator 4 befestigt ist. Die Lageranordnung umfaßt einen mit dem Träger 7 verbundenen feststehenden Lagerteil 8 und einen rotierenden Lagerteil 9, der an seinem unteren Ende einen Rotor 10 zum Antrieb der am oberen Ende befestigten Anodenscheibe 5 aufweist. Die Lagerteile 8, 9 können aus einer Molybdän-Legierung (TZM) bestehen.The rotary anode X-ray tube shown in FIG. 1 has a metal piston 1 to which the cathode is attached via a
An seinem oberen Ende ist das Lagerteil 8 mit zwei in axialer Richtung gegeneinander versetzten fischgrätartigen Rillenmustern 11a, 11b versehen. Die Rillen sind z.B. 10 »m tief, und die Flächen der Rillen stehen zu den dazwischen liegenden Flächen beispielsweise im Verhältnis 1:1. Der Zwischenraum zwischen den Rillenmustern 11a, 11b und dem Lagerteil 9 ist mit einem flüssigen Schmiermittel gefüllt, vorzugsweise einer Galliumlegierung. Die mit den Rillenmustern 11a, 11b versehenen Flächen des feststehenden Lagerteils 8 und die ihnen gegenüberliegenden Flächen des rotierenden Lagerteils 9 bilden somit zwei Spiralrillenlager zur Aufnahme der radialen Lagerkräfte.At its upper end, the bearing
Im Anschluß an das untere Spiralrillenlager hat der Lagerteil einen mehrere Millimeter dicken Abschnitt 12, dessen Durchmesser wesentlich größer ist als der Durchmesser des restlichen Lagerteils 8. Darunter folgt wiederum ein Abschnitt, dessen Durchmesser zumindest annähernd dem Durchmesser des Lagerteils 8 im oberen Bereich entspricht und der mit dem Trägerkörper 7 verbunden ist. Die Innenkontur des Lagerteils 9 ist der Außenkontur des Lagerteils 8 angepaßt. Infolgedessen kann der rotierende Lagerteil 9 nicht einteilig ausgebildet sein, wie in der Zeichnung schematisch dargestellt, sondern muß aus mindestens zwei Teilen bestehen, die im Bereich des Abschnitts 12 auf geeignete Weise miteinander verbunden sind.Following the lower spiral groove bearing, the bearing part has a
Die zur Rotationsachse 16 des Lagerteils 9 senkrecht verlaufenden Stirnflächen des Abschnitts 12 sind ebenfalls mit einem fischgrätartigen Muster (in der Zeichnung nicht dargestellt) versehen und bilden zusammen mit den dazu parallelen Flächen des Lagerteils 9 zwei weitere Spiralrillenlager, die axial nach oben und unten gerichtete Kräfte auf die Drehanode aufnehmen können.The end faces of the
Durch Röntgenaufnahmen, gegebenenfalls in Verbindung mit Durchleuchtungen, erwärmt sich die Anodenscheibe stark. Diese Wärme wird teils von der Anode abgestahlt und teils über den rotierenden Lagerteil 9 geführt. Dieser Wärmestrom führt auch zu einer Erwärmung des feststehenden Lagerteils 8, wobei sich die höchsten Temperaturen in dem Abschnitt 12 einstellen.X-rays, possibly in conjunction with fluoroscopy, heat up the anode disk considerably. This heat is partly abraded from the anode and partly conducted over the rotating bearing
Fig. 2 zeigt den feststehenden Lagerteil 8 und die darin befindliche Kühlvorrichtung. Wie aus der Zeichnung ersichtlich, besitzt das Lagerteil 8 einen Hohlraum mit kreiszylinderförmiger Mantelfläche und ebener, zur Achse 16 senkrechter Stirnfläche. Der Innendurchmesser des Hohlraums beträgt z.B. 20mm.Fig. 2 shows the fixed bearing
In dem Hohlraum ist ein Kühler 14 angeordnet, der ein Metallrohr 141 umfaßt, das auf seiner Außenfläche mit einer Anzahl von Scheiben 142 versehen ist, die sich in zur Drehachse 16 senkrechten Ebenen befinden und deren Außendurchmesser dem Innendurchmesser der Öffnung 13 entspricht bzw. allenfalls wenige zehntel Millimeter kleiner ist als dieser. Der Kühler 14 besitzt an seinem der Stirnfläche des feststehenden Lagerteils 8 zugewandten Ende eine Öffnung 143 in dem Rohr 141. Außerdem besitzt jede Scheibe 142 eine in radialer Richtung verlaufende, beispielsweise 3mm breite schlitzförmige Öffnung 144. Die Öffnungen befinden sich in der Darstellung nach Fig. 2 alternierend auf der rechten bzw. auf der linken Seite, so daß die öffnungen 144 in zwei aufeinanderfolgenden Scheiben um 180° (bezogen auf die Achse 16) versetzt sind.In the cavity, a
Das von der Stirnfläche des Lagerteils 8 abgewandte Ende des Kühlers 14 mündet in einen Abschnitt 145 mit vergrößertem Durchmesser. In diesen Abschnitt ist eine Kühlmittelzuleitung 17 eingeführt, die ebenfalls aus Metall besteht und deren Außendurchmesser dem Innendurchmesser des Abschnitts 145 angepaßt ist.The end of the
Im Betriebszustand fließt der Kühlmittelstrom, der durch den Pfeil 18 angedeutet ist, durch die Zuleitung 17 in das Rohr 141 und tritt im Bereich der Stirnfläche des Lagerteils 8 durch die Öffnung 143 aus dem Rohr aus. Das austretende Kühlmittel teilt sich in zwei Ströme auf, die das Rohr gegensinnig in einem Halbbogen umfließen, bis sie zu der auf der gegenüberliegenden Seite des Rohres befindlichen Öffnung 144 in der ersten Scheibe 142 gelangen, wo sie sich vereinigen und durch die Öffnung hindurchtreten. Nach dem Durchtritt ergeben sich wiederum zwei Kühlmittelströme, die halbbogenförmig um das Rohr herumfließen bis zu der Öffnung in der nächsten Scheibe usw. bis schlußendlich das Kühlmittel aus der Öffnung in der letzten (untersten Scheibe) austritt und auf nicht näher dargestellte Weise dem Kühlmittelkreislauf wieder zugeführt wird.In the operating state, the coolant flow, which is indicated by the
Wären die Scheiben 142 mit ihren Öffnungen 144 nicht vorhanden, dann würde das Kühlmittel in Richtung der Achse und im wesentlichen laminar an den zu kühlenden Innenwänden des Lagerteils 8 vorbeiströmen. Die Kühlwirkung wäre gering. Die Scheiben erzeugen Turbulenzen im Kühlmittelstrom, und zwar umso stärker, je dichter die Scheiben stehen. An diesen Stellen, d.h. im Bereich des Abschnitts 12, ergibt sich die stärkste Kühlwirkung. - Aus dem vorstehenden ergibt sich, daß der Kühler selbst nicht unmittelbar dazu dient, die Wärme abzuführen, sondern daß er in dem Kühlmittelstrom eine Strömung erzwingt, die eine gute Wärmeabfuhr gewährleistet.If the
Die Kühlmittelzuleitung 17 kann im Innern eines nicht näher dargestellten Hochspannungssteckers angeordnet sein, der in eine Öffnung des Keramikisolators 4 eingeführt wird. Eine Druckfeder 19, die die Zuleitung 17 umschließt, und sich gegen den erwähnten Stecker abstützt, drückt dabei den Kühler 14 gegen die Stirnfläche des Lagerteils 8. Infolgedessen ergibt sich zwischen dem erwähnten Hochspannungsstecker und der Anodenscheibe 5 - über die Zuleitung 17, den Kühler 14, den Lagerteil 8, das Schmiermittel und den rotierenden Lagerteil 9 - eine elektrisch leitende Verbindung, die dazu dienen kann, die Anodenscheibe 5 an eine positive Hochspannung anzuschließen.The
Claims (4)
- An X-ray tube which comprises an anode member provided with a cylindrical cavity (13) which opens towards the exterior and which can be connected to a cooling medium flow, in the cavity there being arranged a cooling device (14) which serves to distribute the cooling medium flow and which comprises a first tube (141) on the outer surfaces of which there is provided a cooling medium guide device (142, 144) which is constructed so that the cooling medium repeatedly flows around the tube in the space between the anode member (8) and the tube (141), characterized in that the cooling medium guide device comprises several discs (142) which extend perpendicularly to the longitudinal axis of the tube, each disc comprising an opening (144) for the passage of the cooling medium, and that the openings of neighbouring discs are each time 180° offset.
- An X-ray tube as claimed in Claim 1, characterized in that the discs (142) are arranged at different distances from one another, the spacing between neighbouring discs being the smallest at areas (12) requiring the strongest cooling.
- An X-ray tube as claimed in one of the preceding Claims, characterized in that the anode is a rotary anode which is journalled by means of a bearing which comprises a rotating bearing portion (9) and a stationary bearing portion (8), a liquid lubricant being present between the bearing portions, and that the stationary bearing portion (8) is provided with a cylindrical cavity (13) which opens towards the exterior and in which the cooling device is accommodated.
- An X-ray tube as claimed in Claim 3, characterized in that the high voltage is applied to the anode via the tube (141).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8914064U DE8914064U1 (en) | 1989-11-29 | 1989-11-29 | X-ray tube |
DE8914064U | 1989-11-29 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0430367A2 EP0430367A2 (en) | 1991-06-05 |
EP0430367A3 EP0430367A3 (en) | 1991-09-11 |
EP0430367B1 true EP0430367B1 (en) | 1995-08-16 |
Family
ID=6845002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90203106A Expired - Lifetime EP0430367B1 (en) | 1989-11-29 | 1990-11-23 | X-ray tube |
Country Status (4)
Country | Link |
---|---|
US (1) | US5091927A (en) |
EP (1) | EP0430367B1 (en) |
JP (1) | JP2983617B2 (en) |
DE (2) | DE8914064U1 (en) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4227495A1 (en) * | 1992-08-20 | 1994-02-24 | Philips Patentverwaltung | Rotating anode x-ray tube with cooling device |
US5652778A (en) * | 1995-10-13 | 1997-07-29 | General Electric Company | Cooling X-ray tube |
US5673301A (en) * | 1996-04-03 | 1997-09-30 | General Electric Company | Cooling for X-ray systems |
US6249569B1 (en) * | 1998-12-22 | 2001-06-19 | General Electric Company | X-ray tube having increased cooling capabilities |
DE19926741C2 (en) * | 1999-06-11 | 2002-11-07 | Siemens Ag | Liquid metal plain bearing with cooling lance |
US6335512B1 (en) | 1999-07-13 | 2002-01-01 | General Electric Company | X-ray device comprising a crack resistant weld |
JP4357094B2 (en) | 1999-08-10 | 2009-11-04 | 株式会社東芝 | Rotating anode type X-ray tube and X-ray tube apparatus incorporating the same |
JP3663111B2 (en) | 1999-10-18 | 2005-06-22 | 株式会社東芝 | Rotating anode X-ray tube |
US6377659B1 (en) | 2000-12-29 | 2002-04-23 | Ge Medical Systems Global Technology Company, Llc | X-ray tubes and x-ray systems having a thermal gradient device |
US6477231B2 (en) * | 2000-12-29 | 2002-11-05 | General Electric Company | Thermal energy transfer device and x-ray tubes and x-ray systems incorporating same |
US6430260B1 (en) | 2000-12-29 | 2002-08-06 | General Electric Company | X-ray tube anode cooling device and systems incorporating same |
US6456693B1 (en) | 2001-04-12 | 2002-09-24 | Ge Medical Systems Global Technology Company, Llc | Multiple row spiral groove bearing for X-ray tube |
US6940947B1 (en) | 2002-09-05 | 2005-09-06 | Varian Medical Systems Technologies, Inc. | Integrated bearing assembly |
GB0812864D0 (en) | 2008-07-15 | 2008-08-20 | Cxr Ltd | Coolign anode |
US8243876B2 (en) | 2003-04-25 | 2012-08-14 | Rapiscan Systems, Inc. | X-ray scanners |
US9208988B2 (en) | 2005-10-25 | 2015-12-08 | Rapiscan Systems, Inc. | Graphite backscattered electron shield for use in an X-ray tube |
GB0525593D0 (en) | 2005-12-16 | 2006-01-25 | Cxr Ltd | X-ray tomography inspection systems |
US10483077B2 (en) | 2003-04-25 | 2019-11-19 | Rapiscan Systems, Inc. | X-ray sources having reduced electron scattering |
US8094784B2 (en) | 2003-04-25 | 2012-01-10 | Rapiscan Systems, Inc. | X-ray sources |
US9046465B2 (en) | 2011-02-24 | 2015-06-02 | Rapiscan Systems, Inc. | Optimization of the source firing pattern for X-ray scanning systems |
GB0816823D0 (en) * | 2008-09-13 | 2008-10-22 | Cxr Ltd | X-ray tubes |
GB0901338D0 (en) | 2009-01-28 | 2009-03-11 | Cxr Ltd | X-Ray tube electron sources |
US8300770B2 (en) | 2010-07-13 | 2012-10-30 | Varian Medical Systems, Inc. | Liquid metal containment in an x-ray tube |
DE102017008810A1 (en) * | 2017-09-20 | 2019-03-21 | Cetteen Gmbh | MBFEX tube |
US11276542B2 (en) * | 2019-08-21 | 2022-03-15 | Varex Imaging Corporation | Enhanced thermal transfer nozzle and system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1972414A (en) * | 1931-10-29 | 1934-09-04 | Gen Electric X Ray Corp | Electron discharge device |
US3694685A (en) * | 1971-06-28 | 1972-09-26 | Gen Electric | System for conducting heat from an electrode rotating in a vacuum |
US4622687A (en) * | 1981-04-02 | 1986-11-11 | Arthur H. Iversen | Liquid cooled anode x-ray tubes |
WO1983002850A1 (en) * | 1982-02-16 | 1983-08-18 | Stephen Whitaker | Liquid cooled anode x-ray tubes |
EP0293791A1 (en) * | 1987-06-02 | 1988-12-07 | IVERSEN, Arthur H. | Liquid cooled rotating anodes |
US4945562A (en) * | 1989-04-24 | 1990-07-31 | General Electric Company | X-ray target cooling |
-
1989
- 1989-11-29 DE DE8914064U patent/DE8914064U1/en not_active Expired - Lifetime
-
1990
- 1990-11-23 EP EP90203106A patent/EP0430367B1/en not_active Expired - Lifetime
- 1990-11-23 DE DE59009531T patent/DE59009531D1/en not_active Expired - Fee Related
- 1990-11-26 US US07/618,350 patent/US5091927A/en not_active Expired - Lifetime
- 1990-11-26 JP JP2325128A patent/JP2983617B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2983617B2 (en) | 1999-11-29 |
DE59009531D1 (en) | 1995-09-21 |
EP0430367A3 (en) | 1991-09-11 |
JPH03182037A (en) | 1991-08-08 |
DE8914064U1 (en) | 1990-02-01 |
EP0430367A2 (en) | 1991-06-05 |
US5091927A (en) | 1992-02-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0430367B1 (en) | X-ray tube | |
EP0584868B1 (en) | Rotating anode X-ray tube with a cooling device | |
EP0378274B1 (en) | Rotary anode X-ray tube with at least two spirally grooved bearings | |
EP0578314B1 (en) | Sliding bearing for rotating-anode X-ray tube | |
DE1951383B2 (en) | X-ray tube rotating anode with a composite body made from a heavy metal part and at least one graphite part and a method for producing it | |
DE19929655B4 (en) | X-ray | |
DE2350807B2 (en) | X-ray tube with a liquid-cooled anode | |
WO1986003065A1 (en) | A gas laser, especially an ion laser | |
DE60124823T2 (en) | Rotary anode X-ray tube and X-ray tube device with such a tube | |
DE10320361B3 (en) | Rotating piston X-ray radiator, has cathode and anode fixed in vacuum tube, and rotary guide body coaxially arranged between vacuum tube and coolant housing which rotates at intermediate frequency to reduce rotational power requirements | |
DE102007032496B3 (en) | Apparatus for generating a plasma jet | |
DE2901681B2 (en) | X-ray tube | |
EP0685871B1 (en) | Rotating anode X-ray tube | |
EP3511972A1 (en) | Efficient heat dissipation over sliding bearing for a rotary anode | |
DE3514700A1 (en) | X-ray tube | |
DE19926741C2 (en) | Liquid metal plain bearing with cooling lance | |
EP3504943A1 (en) | Plasma spraying device | |
DE2658513C3 (en) | Rotating anode X-ray tube | |
EP0654812B1 (en) | Rotating anode x-ray tube with slide bearing | |
CH656740A5 (en) | Cooled vacuum capacitor having a variable capacitance | |
DE3611111A1 (en) | ROTATABLE ANODE X-RAY SOURCE | |
DE10353964B4 (en) | X-ray tube with rotary anode | |
EP1022758A2 (en) | Vacuum switch | |
DE19614841A1 (en) | Fluid metal sliding bearing with cooling lance esp. for rotary anode X=ray tube | |
DE3501829C2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB NL |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE FR GB NL |
|
17P | Request for examination filed |
Effective date: 19920311 |
|
17Q | First examination report despatched |
Effective date: 19940613 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19950816 |
|
REF | Corresponds to: |
Ref document number: 59009531 Country of ref document: DE Date of ref document: 19950921 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19951115 |
|
ET | Fr: translation filed | ||
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20021129 Year of fee payment: 13 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031123 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20031123 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20070110 Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20071128 Year of fee payment: 18 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080603 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20090731 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081130 |