US 11,852,073 B2
Orifice pack for compressor bleed valve
Martin Dobson, Brossard (CA); Oleg Iskra, Oakville (CA); Michael Fryer, Oakville (CA); Marc Lavoie, Otterburn Park (CA); Ivan Sidorovich Paradiso, Toronto (CA); Louis Duranleau-Hendrickx, Montreal (CA); Domenico Di Florio, St-Lazare (CA); and Tibor Urac, Mississauga (CA)
Assigned to PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed by PRATT & WHITNEY CANADA CORP., Longueuil (CA)
Filed on Jul. 30, 2021, as Appl. No. 17/389,450.
Prior Publication US 2023/0029960 A1, Feb. 2, 2023
Int. Cl. F02C 6/08 (2006.01); B01D 45/04 (2006.01)
CPC F02C 6/08 (2013.01) [B01D 45/04 (2013.01); F05D 2260/605 (2013.01); F05D 2260/607 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An orifice pack for delivering pressurized air to a compressor bleed valve, the orifice pack comprising:
a body defining a diffusion chamber extending along a central axis, the diffusion chamber having an inlet fluidly connectable to a source of pressurized air, the diffusion chamber having a main cylindrical portion bounded by an inner wall of the body, the main cylindrical portion having a diameter (B);
a vent removably mounted to the body, the vent having a tapering passage, the diffusion chamber and the tapering passage aligned longitudinally and sequentially along the central axis when the vent is mounted to the body, the tapering passage converging towards a first outlet passage in an axial direction away from the diffusion chamber for venting a first portion of the pressurized air from the diffusion chamber, wherein the vent has an upstream end including an axially facing end surface having a radially innermost edge bordering an inlet of the tapering passage, the inlet of the tapering passage having a diameter greater than the diameter (B) of the main cylindrical portion of the diffusion chamber; and
a second outlet passage branching off from the diffusion chamber at an axial location between the inlet and the tapering passage, the second outlet passage fluidly connectable to the compressor bleed valve for directing a second portion of the pressurized air from the diffusion chamber to the compressor bleed valve.