TOROIDAL TURBINE Russian patent published in 1999 - IPC

FIELD: turbines. SUBSTANCE: toroidal turbine intended for operation as a small-sized turbodrive uses body 1 and impeller 2 embracing it with a clearance, both of them for toroidal working passage 3 of two semi-oval sections. The impeller carries blades. Installed on the body is a separator with helical groove 10 with inlet (6) and outlet (7) connections located on its both sides. Inlet connection 6 communicates with the working passage by means of a nozzle with a square exit section, and outlet connection 7 - by means of window 11. The nozzle exit section is shifted relative to the plane of impeller rotation passing through the smaller axes of the groove semi-oval generating lines. Sealing on the impeller end surfaces is made as a labyrinth of annular lugs 12 and grooves; an the side of the heavy-duty surfaces lugs 13 with radial kerfs face the impeller grooves. EFFECT: enhanced turbine efficiency due to improved organization of flow and reduced leakages. 28 cl, 21 dwg