Radial sliding bearing with partial circumferential groove on lower bush

The invention relates to the technical field of steam turbine power generation equipment, and particularly relates to a radial sliding bearing with a partial circumferential groove on a lower bush. The radial sliding bearing comprises an upper bush and the lower bush, the upper bush and the lower bush are abutted and spliced to form an elliptical rotating shaft hole, an axial longitudinal section penetrating through the center of the rotating shaft hole divides the hole surface of the rotating shaft hole on the lower bush into two symmetrical cambered surfaces, the two cambered surfaces are respectively provided with a plurality of arc-shaped groove bodies, and the length of the groove bodies is less than that of the cambered surfaces. According to the bearing, the hole surface structure of the lower bush of the radial bearing is improved, the arc-shaped groove bodies are formed in the hole surface, and oil stored in the groove bodies is used for supplementing lubrication so that the lubrication effect of the