Non-positive-displacement machines or engines, e.g. steam turbines (wit working-fluid flows in opposite axial directions for balancing axial thrust F01D3/02; with other than pure rotation F01D23/00; turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor F01K)

Child Classifications

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• F01D 1/02 with stationary working-fluid guiding means and bladed or like rotor, (F01D1/24 takes precedence; without stationary working-fluid guiding means F01D1/18)
• F01D 1/18 without stationary working-fluid guiding means; (F01D1/24, F01D1/32, F01D1/34 take precedence; )
• F01D 1/24 characterised by counter-rotating rotors subjected to same working fluid stream without intermediate stator blades or the like
• F01D 1/30 characterised by having a single rotor operable in either direction of rotation, e.g. by reversing of blades (combinations of machines or engines F01D13/00)
• F01D 1/32 with pressure velocity transformation exclusively in rotor, e.g. the rotor rotating under the influence of jets issuing from the rotor,
• F01D 1/34 characterised by non-bladed rotor, e.g. with drilled holes (F01D1/32 takes precedence; sirens G10K7/00 )