主权项 |
1. A vane pack (50) for a variable turbine geometry turbocharger comprising:
an upper vane ring (26) having an inner surface (38); a lower vane ring (28) having an inner surface (40); a plurality of vanes (24) operatively positioned between the inner surfaces (38, 40) of the vane rings (26, 28), each vane (24) having opposing cheek surfaces (36), and an abradable coating (52) applied to at least a portion of one of the inner surfaces (38, 40) of the vane rings (26, 28), whereby a minimal clearance is established between the one or more coated inner surfaces (38, 40) and the vane cheeks (36). |