RADIAL TURBINE

摘要

Provided is a turbine that uses a single turbine wheel or turbine-wheel assembly to handle a plurality of fluids having different pressures, thereby decreasing the number of components and reducing cost. Said turbine is an expansion turbine (1) provided with a radial turbine wheel (15) that is provided with a main channel (23), in which a blade height increases incrementally, and axially discharges a fluid that flows in from a main inlet (27) located towards the outside of the radial turbine wheel to the main channel (23), said fluid rotating with the principal velocity component thereof being in the radial direction. Said radial turbine wheel (15) is provided with a secondary channel (25) that branches off from the main channel (23), at a point that is radially inwards of the main inlet (27) and on the side of the main channel facing a hub (17), and runs behind the main channel (23). A secondary inlet (35) is formed at the outwards end of the secondary channel (25), at a different radial position from the main inlet (27), and a fluid having a pressure different from that of the fluid supplied via the main inlet (27) is supplied via said secondary inlet. The main inlet (27) and the secondary inlet (35) are separated by a rear plate (26) adjusted in terms of separation from the main passage (23) or the secondary passage (25).