Variable pitch device and wind generating set

The utility model relates to the technical field of wind power generation equipment, and provides a variable-pitch device and a wind generating set, the variable-pitch device comprises a hub, a variable-pitch shaft, a variable-pitch shaft and a variable-pitch shaft, the hub is provided with a hub web, and a mounting hole is formed in the hub web; a blade; the variable-pitch driving structure is used for providing power for relative movement of the hub and the blades; the first flange is located at the mounting hole, and the first flange is arranged on the side, close to the blades, of the hub web; and the variable pitch driving structure is embedded on the hub web. Power is provided for relative movement of the hub and the blades through the variable-pitch driving structure, the variable-pitch driving structure is embedded in the hub web through the first flange, a boss of the variable-pitch driving structure does not need to be machined and installed on the hub web, on one hand, the problem of stress concent