ROTARY ANODE TYPE X RAY TUBE

摘要

A rotary anode type X ray tube comprising a fixed body having a radial sliding bearing surface (S1) on the side face and an internal channel for allowing cooling liquid (20) to pass, a body of rotation (600) including a disklike large diameter portion (610) having a recess (51a) to which one end portion of the fixed body is fitted across a gap and constituting an anode target (50), and a small diameter portion (620) having a radial sliding bearing surface (S2) surrounding the side face of the fixed body and opposing the above-mentioned radial sliding bearing surface across a gas in the inner surface and integrated with the large diameter portion at one end portion, lubricant filling the gap, a cathode (80) arranged oppositely to the anode target of the large diameter portion, and a vacuum enclosure (90) storing the fixed body, the body of rotation, the lubricant and the cathode and securing the fixed body at the other end portion thereof located on the side opposite to the one end portion of the fixed body being fitted in the recess.