Ceramic ball bearing for ultra-high-speed main shaft

The utility model relates to the technical field of ceramic ball bearings, and discloses a ceramic ball bearing for an ultra-high-speed main shaft, which comprises an outer ring, a mounting groove is formed in the middle of the outer diameter of the outer ring in a penetrating manner, a first guide groove is formed in the middle of the inner wall of the outer ring in a penetrating manner, and outer sealing rings are fixedly connected to two ends of the inner wall of the outer ring; a blocking piece is arranged on the inner wall of the outer sealing ring, an inner sealing ring is arranged at the other end of the outer wall of the blocking piece, the other end of the inner sealing ring is fixedly connected with an inner ring, and a second guide groove penetrates through the middle of the outer wall of the inner ring and is formed in the middle of the outer wall of the inner ring. According to the ceramic ball bearing, firstly, temperature is transmitted to the first deformation metal and the second deformation