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    • 6. 发明授权
    • X-ray tube of the rotary anode type
    • 旋转阳极型X射线管
    • US5384818A
    • 1995-01-24
    • US44174
    • 1993-04-08
    • Katsuhiro OnoHidero AnnoTakayuki KitamiHiroyuki SugiuraMakoto Tanaka
    • Katsuhiro OnoHidero AnnoTakayuki KitamiHiroyuki SugiuraMakoto Tanaka
    • H01J35/10
    • H01J35/101H01J2235/106H01J2235/167
    • An X-ray tube of the rotary anode type includes a rotary structure to which an anode target is fixed, a stationary structure fitted into the rotating member, slide bearings arranged between them and provided with spiral grooves, and a lubricant consisting of gallium alloy and supplied to the slide bearings. The rotary structure includes a first rotating member to which the anode target is connected and a second rotating member provided with the bearings. These first and second rotating members are kept coaxial to each other and connected together at their those portions which are remote from the anode target when viewed in the rotating axis direction of the target and along a heat transmitting line extending from the target to the bearings, but heat insulating clearances and are formed between the rotating members at their other portions not connected. The first rotating member is made of one of those materials which have a heat conductivity smaller than 0.1 (cal/cm.sec..degree.C.) at temperature range of 0.degree. to 500.degree. C. The second rotating member is made of alloy whose main components are iron and nickel, alloy whose main components are iron, nickel and cobalt, alloy whose main components are iron and chromium, alloy whose main components are iron, chromium and nickel, or iron alloy including iron, chromium and one of carbon, molybdenum and tungsten.
    • 旋转阳极型的X射线管包括固定有阳极靶的旋转结构体,嵌入旋转部件的固定结构体,配置在其间的滑动轴承,设有螺旋状的槽,以及由镓合金和 提供给滑动轴承。 旋转结构包括连接阳极靶的第一旋转构件和设置有轴承的第二旋转构件。 这些第一旋转构件和第二旋转构件保持彼此同轴并且在从目标的旋转轴线方向观察时沿着远离阳极靶的那些部分并且沿着从靶向轴承延伸的传热线连接在一起, 但是隔热间隙形成在旋转构件之间的未连接的其它部分。 第一旋转构件由0〜500℃的导热率小于0.1(cal / cm·sec·℃)的材料之一构成。第二旋转构件由合金制成 主要成分为铁和镍,主要成分为铁,镍,钴的合金,主要成分为铁和铬的合金,主要成分为铁,铬,镍的合金,或含铁,铬和碳之一的铁合金, 钼和钨。