| 摘要 |
<p>A power turbine includes pivotable vanes (16) for a variable area nozzle which are accurately and consistently assembled in a first full throat area position by providing an abutment (27) and an abutment surface (29) on gear segment arms (22) attached to spindles at the radially outermost ends of the vanes. When the first vane has been fitted in the 100% throat position by threading its aerofoil portion through a slotted aperture (12,14) in the turbine casing 10, the remaining vanes are accurately angularly positioned by causing their abutments (27) to abut the abutment surface (29) on the previously fitted vane segment arm (22). <IMAGE> <IMAGE></p> |
