Four Point Contact slewing ring bearings heavy duty machinery turntable

A heavy-duty large-scale slewing bearing, which is a slewing bearing. It is characterized in that the outer ring is divided into an upper outer ring and a lower outer ring. The inner peripheral wall of the outer ring is provided with three internal stepped ring segments from top to bottom. The upper and lower outer rings are correspondingly embedded into one body, and the upper and lower outer rings are fastened by screwing bolts; the middle of the inner ring The outer peripheral wall is turned into an annular convex ring segment, and three rows of rollers are installed between the inner ring and the outer ring as rolling elements. A fourth raceway is opened between the lower outer ring and the flange of the lower fuselage of the crane. Steel balls are uniformly installed in the raceway as rolling elements. The upper end of the inner wall of the upper outer ring and the upper surface of the inner ring and the lower end section of the outer peripheral wall of the inner ring are respectively provided with annular sealing grooves, and corresponding sealing strips are installed. It is safe and reliable, has large carrying capacity, saves installation space, reduces labor intensity of workers, and reduces production costs.