Patent ID: 8708668

Claim:
A thrust generating apparatus provided in a liquid and configured to generate thrust by ejecting the liquid, the thrust generating apparatus comprising: an annular stator including a casing, a plurality of coils being provided on an inner periphery side of the casing; a rotor provided on an inner periphery side of the stator and including an annular rotor main body at which a plurality of magnets are provided; a propeller blade provided on a radially inner side of the rotor main body and formed integrally with the rotor main body; and a sliding bearing provided to be opposed to a side surface and outer peripheral surface of the rotor main body and configured to support a thrust load and a radial load, wherein: the casing includes an annular outer casing and an annular inner casing provided on an inner periphery side of the outer casing; the inner casing includes funnel-shaped fairings respectively provided on both sides of the rotor main body and each formed so as to enlarge a diameter thereof in a direction away from the rotor main body; the fairings are provided on the inner periphery side of the outer casing and integrated with the outer casing so that each is detachable; the stator includes a coil accommodating space for accommodating a stator core around which the coils wind and a cooling space formed between the outer casing and the inner casing; a gap is formed between each of outer end portions of the fairings and the outer casing; and the cooling space communicates through the gap with a main channel where the propeller blade is provided.