Sleeve-coiling type mounting structure for impeller and principal shaft

The utility model discloses a sleeve coiling type mounting structure realized by an impeller and a main shaft, which includes a main shaft body and an impeller body mounted on the main shaft body. The impeller body and the main shaft body are matched in the manner of taking the impeller body as the shaft and taking the main shaft body as the hole. The sleeve coiling type mounting structure adopts the matching standard completely opposite to the prior art, the smaller interference fit can be selected, the stress to the impeller body is reduced, and the deformation of an airflow passage is controlled effectively. When a rotor rotates at a high speed, the binding power between the impeller body under the action of the centrifugal force and the main shaft body is larger, and the security is high.