Composite shroud and methods for attaching the shroud to plural blades

• Main Authors: GIOVANNETTI IACOPO, GIANNOZZI MASSIMO, TOGNARELLI LEONARDO, MASSINI ANDREA, BIGI MANUELE, BIANCHI DINO
• Format: Patent
• Language: Chinese; English
• Published: 16.05.2012
• Subjects: BLASTING; COMBINED OPERATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; LIGHTING; MACHINE TOOLS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; NON-POSITIVE DISPLACEMENT PUMPS; OTHER WORKING OF METAL; PERFORMING OPERATIONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WEAPONS

Provided are a method and impeller for a turbo-machine. The impeller includes a metallic base (1502) having a central hole, a back surface (1502b) and a front surface (1502a) opposite to the back surface (1502b); plural blades (1504, 1506) extending on the front surface (1502a) of the metallic base (1502); a composite shroud (1508) attached to the plural blades (1504, 1506) such that plural closed paths or vanes are formed by the front surface (1502a) of the metallic base (1502), the plural blades (1504, 1506) and the composite shroud (1508); and connecting means (1510, 1606, 1706, 1806, 1906, 2302, 2410, 2608, 2612, 3002, 3010, 3402, 3510) configured to attach the composite shroud (1508) to the metallic base (1502) or the plural blades (1504, 1506).