Variable turbine geometry vane with single-axle, self-centering pivot feature

A vane pack assembly (25) for a variable geometry turbocharger comprising:

• an upper vane ring (28);
• a turbine housing (20) having self-centering pivot recesses (48) formed in the surface;
• a plurality of single-axle, self-centering adjustable guide vanes (26) including a post (50) having a first end, a second end, and a vane (52) formed integrally therewith, the vane operatively positioned between the upper vane ring (28) and turbine housing (20);
• a plurality of fastening means (68) extending through the upper vane ring (28) and into the turbine housing (20);
• and
• a plurality of spacers (70) for maintaining a spacing between the upper vane ring (28) and turbine housing (20),
• wherein the first end of the post (50) extends through a through-hole (33) in the upper vane ring (28) and is connected to a vane adjustment lever (74) and the second end of the post (50) is provided with a convex self-centering pivot feature (56a, 56b) and is seated in self-centering pivot recess (48) of the turbine housing (20) which are concave and complementary in shape to the post (50) convex self-centering pivot feature (56a, 56b).

A vane pack assembly (25) for a variable geometry turbocharger comprising:

• an upper vane ring (28);
• a lower vane ring (30) having an upper surface and a lower surface, and having self-centering pivot recesses (48) formed in the upper surface;
• a plurality of single-axle, self-centering adjustable guide vanes (26) including a post (50) having a first end, a second end, and a vane (52) formed integrally therewith, the vane operatively positioned between the upper and lower vane rings (28, 30);
• a plurality of fastening means (68) extending through the upper (28) and lower vane (30) rings;
• and
• a plurality of spacers (70) for maintaining a spacing between the upper and lower vane rings (28, 30),
• wherein the first end of the post (50) extends through a through-hole (33) in the upper vane ring (28) and is connected to a vane adjustment lever (74) and the second end of the post (50) is provided with a convex self-centering pivot feature (56a, 56b) and is seated in a complementary shaped concave self-centering pivot recess (48) of the lower vane ring with a gap between the convex self-centering pivot feature (56a, 56b) and the complementary shaped concave self-centering pivot recess (48).