Impeller air guide sleeve for large-scale wind turbine generator

The utility model discloses an impeller air guide sleeve for a large-scale wind turbine generator, which comprises a sleeve body and an end cover, the sleeve body is composed of three axially distributed petal-shaped sleeve shell arc plates, each petal-shaped sleeve shell arc plate is provided with a blade mounting hole, and two adjacent petal-shaped sleeve shell arc plates are movably connected through at least one group of pressing devices; correcting bases are arranged at the two ends of the inner side of each cover shell arc plate, semicircular grooves are machined in the correcting bases,supporting rings are installed at the two ends in the cover body, semicircular protrusions corresponding to the cover shell arc plates are arranged on the supporting rings, and the semicircular protrusions abut against the interiors of the semicircular grooves. A cylindrical groove is machined in the center of the top of the end cover 8, and at least two sets of supporting assemblies are arrangedin the end cover. Accordi