公开(公告)号：US10094425B2

公开(公告)日：2018-10-09

申请号：US15312340

申请日：2015-04-01

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Peter Klaus Bachmaan ,  Anand Kumar Dokania ,  Wilhelmus Cornelis Keur ,  Gereon Vogtmeier ,  Willem Potze ,  Christian Herbert Blome

IPC分类号： A61B6/00 ,  F16C39/02 ,  F16C17/02 ,  F16C17/10 ,  F16C17/04 ,  F16C33/12 ,  F16C43/02 ,  G01N23/04 ,  H01J35/06 ,  H01J35/10

摘要： The present invention relates to hydrodynamic bearings, X-ray tubes, X-ray systems, and a method of manufacturing a hydrodynamic bearing for an X-ray tube. The rotor of a hydrodynamic bearing is supported, in steady-state operation, by the pressure of lubricant which is pumped through grooves in the rotor. When the rotor is speeding up or slowing down, the pumping force will not be sufficient to lift the rotor clear of a stationary bushing, and damage, caused by direct contact of the metal surfaces of the bearing, can occur. Providing special coatings on the bearing surfaces can ameliorate this effect.

公开(公告)号：US09771978B2

公开(公告)日：2017-09-26

申请号：US15119246

申请日：2015-05-27

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Willem Potze ,  Anand Kumar Dokania ,  Gereon Vogtmeier ,  Peter Klaus Bachmann ,  Christian Herbert Blome ,  Michael Luebcke

IPC分类号： G11B19/20 ,  F16C17/02 ,  F16C33/10 ,  F16C17/10 ,  F16C43/02 ,  A61B6/03 ,  H01J35/10 ,  G11B33/14

CPC分类号： F16C33/106 ,  A61B6/032 ,  F16C17/026 ,  F16C17/105 ,  F16C17/107 ,  F16C33/107 ,  F16C33/24 ,  F16C43/02 ,  F16C2202/54 ,  F16C2316/10 ,  F16C2370/12 ,  G11B19/2036 ,  G11B19/2045 ,  G11B33/148 ,  H01J35/101

摘要： A self-acting, sealed hydrodynamic bearing includes a bearing shaft; a bearing bushing arranged to seal a length of the bearing shaft; a lubricant provided in the sealed length of the hydrodynamic bearing; and a bearing arrangement between the shaft and bushing. The bearing shaft and/or the bearing bushing are configured to be rotatable. The bearing arrangement includes a primary bearing surface disposed on the bearing bushing, arranged to face a secondary bearing surface disposed on the bearing shaft. The primary and/or secondary bearing surfaces includes first regions having a first fluid slip characteristic, and second regions having a second fluid slip characteristic substantially different to that of the first fluid slip characteristic. The second and first regions are in a same plane of a cross-section of the primary and/or secondary bearing surfaces, and are disposed in an interleaved pattern over the primary and/or secondary bearing surfaces.

公开(公告)号：US20140321619A1

公开(公告)日：2014-10-30

申请号：US14360661

申请日：2012-11-14

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Anand Kumar Dokania ,  Gereon Vogtmeier ,  Peter Klaur Bachmann

IPC分类号： H01J35/06

CPC分类号： H01J35/065 ,  B82Y99/00 ,  H01J2201/30469 ,  Y10S977/939

摘要： An X-ray tube, a medical X-ray device comprising such X-raytube and a method for operating such X-ray tube are proposed. The X-ray tube (1) comprises an electron emitter (3) with a substrate (4) having an electron emission surface (5). The electron emission surface (5) is adapted for field emission of electrons therefrom by providing a substantial roughness Such roughness may be obtained by applying carbon nano-tubes (19) onto the electron emission surface (5). A field generator (7) is provided for generating an electrical field adjacent to the electron emission surface (5) for inducing field emission of electrons therefrom. Furthermore, a heater arrangement (15) is provided and adapted for heating the electron emission surface (5) contemporaneous with the field emission of electrons. Accordingly, while electrons are emitted from the electron emission surface (5) due to a field effect, this electron emission surface (5) may also be heated to substantial temperatures of between 100 and 1000° C. It has been observed that such heating may stabilize electron emission characteristics as the emitter (3)as adsorbents or contaminations to the carbon nano-tubes may be reduced.

摘要翻译： 提出了一种X射线管，包括这种X射线管的医用X射线装置和这种X射线管的操作方法。 X射线管（1）包括具有电子发射表面（5）的基底（4）的电子发射体（3）。 电子发射表面（5）适于通过提供实质上的粗糙度来从其发射电子。通过将碳纳米管（19）施加到电子发射表面（5）上，可以获得这种粗糙度。 提供场发生器（7），用于产生与电子发射表面（5）相邻的电场，用于从其发射电子的场发射。 此外，提供加热器装置（15）并且适于加热与电子的场发射同时的电子发射表面（5）。 因此，虽然由于场效应从电子发射表面（5）发射电子，但是该电子发射表面（5）也可以被加热到100至1000℃之间的实际温度。已经观察到这种加热可能 作为发射体（3），作为碳纳米管的吸附剂或污染物可以稳定电子发射特性。

公开(公告)号：US11064600B2

公开(公告)日：2021-07-13

申请号：US16612783

申请日：2018-05-30

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Anand Kumar Dokania ,  Rolf Karl Otto Behling

IPC分类号： A61B6/00 ,  A61B6/03 ,  H01J35/06 ,  H01J35/08 ,  H01J35/14 ,  H05G1/02 ,  H05G1/08 ,  H05G1/10 ,  H05G1/26 ,  H05G1/32 ,  H05G1/34 ,  H05G1/46 ,  H05G1/52 ,  H05G1/54 ,  H01J35/10

摘要： At least one power supply produces a voltage between a cathode and an anode. The cathode and anode are operable such that electrons emitted from the cathode interact with the anode with energies corresponding to the voltage. The electrons interact with the anode at a focal spot to generate X-rays. The power supply provides the cathode with a cathode current. An electron detector is positioned relative to the anode, and a backscatter electron signal is measured from the anode. The measured backscatter electron signal is provided to a processing unit, which determines a cathode current correction and/or a correction to the voltage between the cathode and the anode using the measured backscatter electron signal and a correlation between anode surface roughness and backscatter electron emission.

公开(公告)号：US10806426B2

公开(公告)日：2020-10-20

申请号：US16322512

申请日：2018-03-30

申请人： KONINKLIJKE PHILIPS N.V.

发明人： Gereon Vogtmeier ,  Anand Kumar Dokania ,  Ravindra Bhat ,  Jens Von Berg

IPC分类号： A61B6/08 ,  A61B6/00

摘要： The present invention relates to a mobile X-ray device, comprising: a housing with an X-ray source arranged therein, a sensor system comprising one or more sensors for aligning the X-ray source to an object to be scanned and/or detecting at least one extrinsic object in a predefined area in a vicinity of the X-ray beam of the X-ray source; a processor unit comprising determining the alignment of the X-ray source and the object to be scanned based on signals received from the sensor system; image acquisition for generating an X-ray image; activating a blockage signal for the mobile X-ray device based on signals received from the sensor system; and an interface for outputting the generated X-ray image and/or information; wherein image acquisition is blocked, if the sensor system signals one of the following: at least one extrinsic object is detected within the predefined area; lack of alignment between the X-ray source and the object to be scanned.