Aircraft impeller and aircraft

An aircraft impeller, comprising a frame body and a rotary wheel part, wherein:

• the frame body comprises a mounting groove, and the rotary wheel part is fixedly arranged in the mounting groove;
• the mounting groove has an axial centre line;
• the mounting groove further has an open surface and a bottom surface arranged opposite to each other;
• the rotary wheel part comprises at least one blade distributed around the axial centre line, wherein each blade comprises a windward surface;
• and an angle formed between the open surface and a plane tangential to the windward surface is an acute angle, at a position where the windward surface is connected to the open surface;
• a mounting through hole is provided in a middle of the mounting groove, the mounting through hole has a central axis substantially coincident with the axial centre line, and the mounting through hole has a sidewall extending from the open surface to the bottom surface;
• the aircraft impeller further comprises a protective cover capable of covering the bottom surface, and the protective cover is detachably arranged on an outer sidewall formed by connecting an outer edge of the bottom surface and an outer edge of the open surface to each other;
• and
• an internal thread is provided inside the mounting through hole, a mounting pin is arranged at a central portion of an inner side surface of the protective cover, an external thread is provided on the mounting pin, and the protective cover is arranged on the outer sidewall in such a manner that the mounting pin is screwed to inside of the mounting through hole.