External rotor (turbine)

External rotor with bearing rollers and tapping of the rotational energy

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An external rotor turbine is a fluid energy machine ; the flow energy of the fluid is converted into rotational energy of the turbine . The special feature of the external rotor is that the rotational energy is not tapped in the center of the paddle wheel on an axis; the blades are attached at the outer end , the rotational energy is tapped at the outer ring . As a result, the entire turbine cross-section can be flown through without a “central nacelle” or similar. must exist. The problem is usually the bearing and sealing of the outer ring.