Hydraulic damper capable of increasing rotation angle

The utility model discloses a hydraulic damper capable of increasing a rotation angle. Wherein the shaft sleeve is provided with an oil cavity, and the rotating shaft is matched with the oil cavity ina sealing and rotating mode and can disturb flowing of damping oil. A valve plate matched with the wall of the oil cavity in a clutch mode is hinged to each of two rotor wing plates of the rotating shaft in a swinging mode, two elastic oil separation ribs capable of abutting against the rotating shaft and limiting the rotating amplitude of the rotor wing plates are arranged on the wall of the oilcavity, and each oil separation rib is provided with a V-shaped face and a wedge pressing face. The V-shaped surface in the rotating direction of the rotating shaft can be matched with a rotor wing plate oil scratching surface to increase the rotating angle of the rotating shaft; when oil pressure difference is generated between the rotor wing plate and the two sides of the valve block to enablethe rotating shaft to rotat