| 摘要 |
Parts (4, 5, 6) are provided which form air control surfaces, which together with wall parts (7, 8) limit an inlet zone (9) for conducting air into the device and guiding it for drive purposes towards the rotor (1). A rotor zone (10) is provided in which the rotor is fitted and an outlet zone (11) for conducting air from the rotor zone out of the device. The parts forming the air control surfaces together with the wall parts limit a vacuum zone (12) which is sepd. from the inlet and outlet zones but connected with the rotor zone for generation of a vacuum in a part (10a) of it, this vacuum participating in the drive of the rotor. The air control surfaces are arranged centrally to one another and the wall parts run straight and parallel with each other between the air control surfaces with which they are connected. |
