Rolling rotor expansion machine

The invention discloses a rolling rotor expansion machine, which belongs to the technical field of rolling rotors, and is characterized in that a cylindrical cavity is arranged in the middle in a cylinder main body, a front end cover is mounted at the front end of the cylinder main body, a rear end cover is mounted at the rear end of the cylinder main body, and an eccentric rotating device is mounted in the cylindrical cavity of the cylinder main body; a plurality of air inlet holes circularly distributed around the center position at intervals are formed in the middle of the front end cover, a sliding groove and an exhaust through hole are further formed in the inner wall of the air cylinder body, the sliding groove is communicated with the cylindrical cavity, and the telescopic abutting device and the eccentric rotating device divide the cylindrical cavity into an air inlet cavity and an exhaust cavity which change in size along with rotation of the eccentric rotating device; high-pressure gas is input thro