A device for transporting a liquid, in particular a gerotor pump. The device has a housing with a flange which enclose a volume, an outer rotor mounted for rotation about a longitudinal axis and an inner rotor of a displacement mechanism, and a rotor of an electric drive. The rotor of the electric drive is formed integrally with the outer rotor. In addition, the flange is formed integrally with an eccenter for receiving the inner rotor and with a peg-shaped bearing element extending in the direction of the longitudinal axis for receiving the outer rotor.

A screw compressor for compressing a medium, having a drive unit which has a drive, and having a compressor unit which has two mutually engaging rotors with screw profiles, which are complementary to one another, and a compressor housing having an inlet and an outlet. The rotors are coupled to the drive unit via a shaft in each case. The shafts are only mounted on the drive side of the rotors. The rotors are mounted only on one side relative to their axial direction and are not mounted on the side which faces axially away from the drive.