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    • 9. 发明公开
    • ROTARY POSITIVE POLE TYPE X−RAY TUBE
    • RÖNTGENRÖHREDES DREH-POSITIVPOLTYPS
    • EP1432005A1
    • 2004-06-23
    • EP02762900.5
    • 2002-08-29
    • Kabushiki Kaisha Toshiba
    • ANNO, HideroSAITO, Shin
    • H01J35/10F16C17/10
    • F16C37/00F16C17/026F16C17/107F16C33/107H01J35/10H01J35/101H01J35/106H01J2235/1287
    • An anode target (22) is rotatably supported by a rotating mechanism (25) having a rotary body (23) and a stationary body (28). A fitted portion between the rotary body (23) and the stationary body (28) is formed of bearing areas (L1) to (L4) having dynamic pressure type sliding bearings and a non-bearing area (L5) having a clearance between the rotary body (23) and the stationary body (28) larger than that in the bearing areas (L1) to (L4). The rotary body facing the non-bearing area is positioned where a time for heat transfer from the anode target (22) is shorter than the rotary body facing the bearing areas. Thus, the characteristics of heat radiation from the anode target (22) can be improved, and a stable bearing operation can be maintained.
    • 阳极靶(22)由具有旋转体(23)和静止体(28)的旋转机构(25)可旋转地支撑。 旋转体(23)与固定体(28)之间的配合部分由具有动压型滑动轴承的轴承区域(L1)至(L4)和在旋转体(23)之间具有间隙的非承载区域(L5) 主体(23)和固定体(28)比轴承区域(L1)至(L4)中的大。 面向非承载区域的旋转体位于从阳极靶(22)传热的时间比面向轴承区域的旋转体短的位置。 因此,能够提高来自阳极靶(22)的热辐射特性,能够维持稳定的轴承运转。