Patent ID: 8979490
Filing Date: 2015-03-17
Classification: F04D,Y10T

Abstract:
1. A fan inlet diffuser housing (FIDH) system, comprising: an air cycle machine (ACM); an FIDH housing coupled to the ACM; an inlet fan disposed on the ACM and configured to pass inlet air into the FIDH; a center tube disposed in the FIDH housing, wherein the center tube further comprises acoustical foam disposed therein; a diffuser cone disposed around at least a portion of the center tube; an inboard strut supporting the center tube within the diffuser cone, the inboard strut having a substantially Y-shaped cross-section and comprising three outer diameter walls and three inner diameter walls; and an outboard strut supporting the center tube within the diffuser cone, the outboard strut being integral with the diffuser cone, the outboard strut having a substantially Y-shaped cross-section and comprising three outer diameter walls and three inner diameter walls, wherein the three inner diameter walls of the inboard strut are coupled to the center tube with a first plurality of mechanical fasteners, the three inner diameter walls of the outboard strut are coupled to the center tube with a second plurality of mechanical fasteners, the three outer diameter walls of the inboard strut are coupled to the diffuser cone with a third plurality of mechanical fasteners, upset ends of the first and second plurality of mechanical fasteners are disposed in the acoustical foam, and the first plurality of mechanical fasteners comprises six rivets distributed in pairs at each of the three inner diameter walls of the inboard strut.