Patent ID: 6751291
Filing Date: 2004-06-15
Classification: F16C,H01J

Abstract:
A rotary anode type X-ray tube, comprising:an anode target configured to emit an X-ray; a rotating mechanism configured to rotatably support said anode target, including a rotor section and a stator section; a vacuum envelope configured to house said anode target and said rotating mechanism; a bearing mechanism arranged between said rotor section and said stator section and including a dynamic slide bearing using a liquid metal lubricant, and roller bearings; and means for rotating the rotor section at a predetermined speed; wherein the rotor section is rotatably supported by the dynamic slide bearing in a rotating mode in which the rotor section rotates at the predetermined speed, and the rotor section is supported by the roller bearings in a stopping mode in which the rotor section does not rotate and in a starting mode in which the rotor section begins to rotate.