| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a gas turbine capable of improving rotational efficiency in a turbine, and capable of simplifying a structure, even when an inflow quantity of exhaust gas is little. <P>SOLUTION: This gas turbine 10 has a turbine impeller 14 journaled in a casing 11, an orifice part 16 arranged around the turbine impeller 14, and a scroll 15 arranged so as to surround the orifice part 16. The orifice part 16 is composed of a cylindrical inner ring 18 and an outer ring 19. Openings 20 and 27 being a gas passage are formed in a plurality in the circumferential direction in the inner ring 18 and the outer ring 19. An introducing blade 21 is arranged in the opening 20 of the inner ring 18, and two passages R and S are formed in the opening 20 of the inner ring 18 by the introducing blade 21. The opening 27 of the outer ring 19 is switched to a state of communicating only with the passage R of the inner ring 18 and a state of communicating with the passage R and the passage S by rotatably controlling the inner ring 18 to the outer ring 19 in response to a flow rate. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
