| 摘要 |
<p>An X-ray tube comprises a substantially cylindrical rotor (12) having an anode target (11) fixed thereto, a substantially columnar stationary shaft (20) coaxially arranged inside the rotor (12) with a bearing gap, a dynamic slide bearing (23, 24) having helical grooves (21, 22) and formed between the rotor (12) and the stationary shaft (20), and a metal lubricant supplied to the grooves and to the gap. An axial bore (40) is formed in the shaft (20) in a manner to extend in the longitudinal direction of the shaft (20), and an insertion rod (50) is inserted into the axial bore (40) such that a space extending in the longitudinal direction of the shaft (20) is formed between the inner circumferential surface of the axial bore (40) and the outer circumferential surface of the insertion rod (50). The space acts as a lubricant reservoir (R) for storing the metal lubricant. <IMAGE></p> |
