Patent ID: 7955051

Claim:
A diffuser/guide vane assembly for supplying air to an annular combustion chamber in a turbomachine, comprising: a radial diffuser including an upstream annular flange, a downstream annular flange and a first set of vanes with a substantially helical inclination, the upstream annular flange and downstream annular flange are parallel to each other and each extend annularly around an axis of the turbomachine, upstream ends of the first set of vanes are fastened to the upstream annular flange by brazing and downstream ends of the first set of vanes are fastened to the downstream annular flange by brazing; an annular guide vane assembly placed at the outlet of the diffuser including an external cylindrical shelf, an internal cylindrical shelf, arranged coaxial with and inside of the external cylindrical shelf, and a second set of substantially radial vanes, outer radial ends of the second set of vanes are fastened to the external cylindrical shelf by brazing and inner radial ends of the second set of vanes are fastened to the internal cylindrical shelf by brazing; a first outer annular linking piece with a first end fastened to the upstream annular flange and a second end fastened to the external cylindrical shelf; and a second inner annular linking piece with a first end fastened to the downstream annular flange and a second end fastened to the internal cylindrical shelf, wherein the upstream and downstream annular flanges of the diffuser, the external and internal cylindrical shelves of the guide vane assembly and the first and second annular linking pieces are formed from metal sheets, and wherein the metal sheets of the upstream and downstream annular flanges include apertures into which the upstream and downstream ends of the first set of vanes are fitted and brazed, respectively, and the metal sheets of the external and internal cylindrical shelves include apertures into which the outer radial and inner radial ends of the second set of vanes are fitted and brazed, respectively.