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公开(公告)号：US20170102031A1
公开(公告)日：2017-04-13
申请号：US15119246
申请日：2015-05-27
发明人： WILLEM POTZE , ANAND KUMAR DOKANIA , GEREON VOGTMEIER , PETER KLAUS BACHMANN , CHRISTIAN HERBERT BLOME , MICHAEL LUEBCKE
IPC分类号： F16C33/10 , F16C17/10 , G11B19/20 , A61B6/03 , H01J35/10 , G11B33/14 , F16C17/02 , F16C43/02
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： Hydrodynamic bearings exploit the properties of pumping action in a fluid to support a bearing load. Conventionally, the pumping action is provided by grooved surfaces in a bearing surface of the bearing. The provision of grooves leads to functional and practical problems, though. The action of grooves on a lubrication material leads inevitably to shear stress being exerted in the fluid. This has a detrimental effect on the load performance of a hydrodynamic bearing. In practical terms, the accurate manufacture of grooves is onerous. This application discusses a way of producing a hydrodynamic bearing using a portion of a bearing surface with an interleaved pattern of materials, wherein the materials have alternate high and low (or zero) fluid slip characteristics. The varying fluid slip characteristic of the surface induces a pumping effect analogous to that provided by a grooved surface.
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2.发明申请公开(公告)号：US20170097049A1
公开(公告)日：2017-04-06
申请号：US15312340
申请日：2015-04-01
发明人： PETER KLAUS BACHMAAN , ANAND KUMAR DOKANIA , WILHELMUS CORNELIS KEUR , GEREON VOGTMEIER , WILLEM POTZE , CHRISTIAN HERBERT BLOME
IPC分类号： F16C39/02 , F16C17/10 , F16C17/04 , H01J35/10 , F16C43/02 , G01N23/04 , H01J35/06 , F16C17/02 , F16C33/12
CPC分类号： F16C39/02 , F16C17/026 , F16C17/045 , F16C17/107 , F16C33/109 , F16C33/124 , F16C33/125 , F16C43/02 , F16C2202/54 , F16C2206/04 , F16C2206/58 , F16C2206/80 , F16C2206/82 , F16C2223/30 , F16C2240/06 , G01N23/04 , H01J35/06 , H01J35/101
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.
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公开(公告)号：US20200281549A1
公开(公告)日：2020-09-10
申请号：US16650556
申请日：2018-09-21
摘要： An X-ray imaging system (10) for medical imaging is provided. The imaging system (10) comprises an X-ray source (12) for emitting X-rays, an X-ray detector (14) for detecting X-rays, at least one unmanned aircraft (16), and at least one controller (18) for controlling at least one of the X-ray source (12), the X-ray detector (14), and the at least one unmanned aircraft (16). The X-ray source (12) or the X-ray detector (14) is arranged on the at least one unmanned aircraft (16), wherein the X-ray imaging system (10) is configured to capture an X-ray image of an object (15) arranged between the X-ray source (12) and the X-ray detector (14).
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公开(公告)号：US20200154553A1
公开(公告)日：2020-05-14
申请号：US16612783
申请日：2018-05-30
摘要： The present invention relates to an apparatus (10) for generating X-rays. It is described to produce (210) with at least one power supply (40) a voltage between a cathode (20) and an anode (30). The cathode is positioned relative to the anode, and the cathode and anode are operable such that electrons emitted from the cathode interact with the anode with energies corresponding to the voltage, and wherein the electrons interact with the anode at a focal spot to generate X-rays. The at least one power supply provides (220) the cathode with a cathode current. An electron detector (50) is positioned (230) relative to the anode, and a backscatter electron signal is measured (240) from the anode. The measured backscatter electron signal is provided (250) to a processing unit (60). The processing unit determines (260) a cathode current correction and/or a correction to the voltage between the cathode and the anode, wherein the determination comprises utilization of the measured backscatter electron signal and a correlation between anode surface roughness and backscatter electron emission. The cathode current correction and/or the correction to the voltage between the cathode and the anode is provided (270) to the at least one power supply.
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公开(公告)号：US20200008773A1
公开(公告)日：2020-01-09
申请号：US16322512
申请日：2018-03-30
IPC分类号： 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.
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