Rotary joint

The utility model relates to a rotary joint, and aims to provide a double-path hydraulic high-speed rotary joint which is low in cost, small in size, high in precision, high in rotating speed, small in temperature rise and strong in universality, and can be additionally arranged on various types of rotary tables to promote the expansion of the functions of the rotary tables. Comprising a fixed seat, a rotating mandrel, a bearing, a first static ceramic wafer, a first movable ceramic wafer, a second static ceramic wafer and a second movable ceramic wafer, and the rotating mandrel is installed in the fixed seat through the bearing; first channels which are communicated with each other are arranged on the fixed seat and the rotary core shaft, and the joint is sealed through a first static ceramic chip and a first movable ceramic chip; second channels which are communicated with each other are further arranged on the fixed seat and the rotary mandrel, and the joint is sealed through a second static ceramic plate