| 摘要 |
<p>Variable geometry turbine, in particular a gas turbine, comprising a housing (2,22), a turbine rotor (4), a fluid inlet scroll (1) that surrounds said turbine rotor, a vaned nozzle (7) interposed between said inlet scroll and said turbine rotor conceived to accelerate the flow of fluid, said nozzle comprising an axially adjustable ring (5,25) conceived to vary the nozzle gap (3,23) and having a wall (19) delimiting said nozzle gap, said wall having balance holes (6,26,26') connecting the nozzle gap with a chamber (12) delimited by said housing and said ring, wherein the edges (16), formed by said holes with the surface (18) of said wall facing the nozzle gap, are rounded in the portion (17,17') located downstream the holes with respect to the fluid flow. Turbocharger and supercharged engine comprising said turbine.</p> |
