Patent ID: 9394792
Filing Date: 2016-07-19
CPC Classification: F01D,F02C,F04D,F05D,Y10T

Claim Text:
1. A system for minimizing non-integral vibrations in rotor blades, comprising: a casing having a plurality of bleed slots; at least one of said bleed slots being located in close proximity to a row of rotor blades; a plurality of structural ligaments; at least one of said structural ligaments extending between two adjacent ones of said bleed slots; a plurality of valves for sealing said bleed slots and for preventing a flow of air through said bleed slots; and a channel in said at least one structural ligament, wherein said rotor blades rotate about an axis and two opposed ends of said structural ligament are inclined at a non-perpendicular angle with respect to said axis.