Integrated corrosion-resistant impeller of large vacuum pump

The utility model belongs to the technical field of impellers, and particularly relates to an integrated corrosion-resistant impeller of a large vacuum pump, which comprises a base plate seat, an integrated impeller is arranged in the base plate seat, a support convex column is arranged at the center of the base plate seat, a fixing cover is arranged at the upper end of the support convex column, and a cross groove is arranged on the end face of the support convex column. By arranging the base, the sealing groove, the sealing block, the limiting plate, the movable groove, the fixing cover, the fixing plate, the cross plate, the cross groove, the fixing groove and the cooling protrusion, the sealing effect of the sealing block on the middle of the blades of the integrated impeller can be achieved, media are prevented from remaining in the middle of the blades when the impeller is shut down, the situation that the impeller is rusted and damaged is avoided, and the service life of the impeller is prolonged. Acco