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公开(公告)号：EP1124249A2
公开(公告)日：2001-08-16
申请号：EP01300404.9
申请日：2001-01-18
IPC分类号： H01J35/10
CPC分类号： F16C37/007 , H01J35/101 , H01J2235/1046 , H01J2235/1208
摘要： A high energy x-ray tube includes an evacuated chamber (12) containing a rotor (34) which rotates an anode (10) in the path of a stream of electrons (A) to generate an x-rays (B) and heat. The rotor includes a bearing shaft (54, 80, 122) connected to the anode by a thermally conductive structure (40) . The bearing shaft carries soft metal-lubricated bearing balls (44F, 44R) in forward and rear bearing races (64, 66, 106, 108, 128, 130) . An annular groove (70, 94, 132) is defined longitudinally in the shaft which, particularly when evacuated, provides a thermal barrier between the forward race and the portion of the shaft that is thermally connected with the anode. The groove lengthens the path heat entering the bearing shaft travels in order to reach the forward bearing race. As a result, the temperature of the forward race, and hence the evaporation of lubricant during operation of the x-ray tube, is reduced. The groove may be formed by electrical discharge machining the bearing shaft or by forming the shaft from inner and peripheral components (124, 126) which are connected together adjacent the rear bearing race (130) .
摘要翻译： 高能量X射线管包括：真空室（12），其包含转子（34），该转子使电子（A）的路径中的阳极（10）旋转以产生X射线（B）和热量。 转子包括通过导热结构（40）连接到阳极的轴承轴（54,80，122）。 轴承轴在前后轴承座（64,66,106,108,128,130）中承载软金属润滑轴承滚珠（44F，44R）。 在轴中纵向地限定环形槽（70,94,132），特别是在抽空时，在前轮与轴的与阳极热连接的部分之间提供热障。 凹槽延长进入轴承轴的路径，以便到达正向轴承座。 结果，减少了正面跑道的温度，并因此降低了在X射线管操作期间润滑剂的蒸发。 凹槽可以通过对轴承轴进行放电加工或者通过相邻于后轴承座圈（130）连接在一起的内部和外围部件（124,126）形成轴而形成。
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公开(公告)号：EP1124250A1
公开(公告)日：2001-08-16
申请号：EP01301145.7
申请日：2001-02-09
CPC分类号： F16C37/007 , H01J35/101 , H01J2235/1046 , H01J2235/1208
摘要： A high energy x-ray tube includes an evacuated chamber containing a rotor which rotates an anode in the path of a stream of electrons to generate an x-ray beam and heat. Heat is carried away from the anode to a bearing shaft (54) which rotates relative to a stationary rotor (42) on forward and rear lubricated bearings (44F, 44R) . The heat is directed away from the forward bearings (44F) , by a core (70) of a thermally conductive material, such as copper, disposed in a central cavity (60) within the shaft. Annular insulating regions (74,76) are optionally defined between the core and the bearing shaft adjacent the races to increase the thermal path between the anode and the races. The reduction in temperature of the forward bearings results in a decrease in the evaporation rate of the lubricant (46) and a corresponding increase in the lifetime of the x-ray tube.
摘要翻译： 高能X射线管包括一个真空室，该真空室包含转子，该转子使电子流的路径中的阳极旋转以产生X射线束和加热。 热量从阳极运送到相对于前后润滑轴承（44F，44R）上的固定转子（42）旋转的轴承轴（54）。 通过设置在轴内的中心腔（60）中的导热材料（例如铜）的芯（70）将热量引导远离前进轴承（44F）。 环形绝缘区域（74,76）任选地限定在与座圈相邻的芯部和轴承轴之间，以增加阳极和座圈之间的热路径。 前进轴承的温度降低导致润滑剂（46）的蒸发速率降低和X射线管寿命的相应增加。
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