Rotary anode X-ray tube bearing structure

The invention discloses a rotating anode X-ray tube bearing structure which comprises a target disc, a rotor is arranged on the right side of the target disc, a second mounting hole is formed in the rotor, a fixing sleeve is arranged in the second mounting hole, a bearing sleeve is arranged in the fixing sleeve, a bearing core shaft is arranged in the bearing sleeve, and a rotating anode X-ray tube is arranged in the bearing core shaft. A ceramic ball is arranged at the joint of the bearing core shaft and the bearing sleeve, a conductive brush is arranged on the right side of the bearing core shaft, and a spring is arranged between the bearing core shaft and the fixed sleeve. According to the rotating anode X-ray tube bearing structure, the friction force between the bearing mandrel and the fixed sleeve can be effectively reduced through the annularly-distributed ceramic balls, the ceramic balls made of ceramic materials can be effectively prevented from being heated to be hot, abrasion of the ceramic balls c