Rotating connector for LNG filling arm

The utility model discloses a rotating connector for an LNG filling arm. The rotating connector comprises a ball bearing, and a left flange and a right flange are fixed at the two ends of the ball bearing respectively; the ball bearing comprises an inner ring, a left outer ring and a right outer ring, and a steel ball rollaway nest between the inner ring and the left outer ring and a steel ball rollaway nest between the inner ring and the right outer ring are arranged in a staggered mode; an inner bushing is arranged in the inner ring. Compared with a traditional rotating connector, the inner bushing of the rotating connector for the LNG filling arm can float left and right, and the compensation dosage on the width of a groove of a sealing ring is increased; the outer ring is divided into the left outer ring and the right outer ring, an annular groove used for installation limitation is arranged between the left outer ring and the right outer ring, and therefore coaxiality of the left rollaway nest and the right rollaway nest can be guaranteed; the steel ball rollaway nest between the inner ring and the left outer ring and the steel ball rollaway nest between the inner ring and the right outer ring are arranged in the staggered mode, so that the capacity of bearing bending moment of the rotating connector is improved.