公开(公告)号：US10077714B2

公开(公告)日：2018-09-18

申请号：US14935004

申请日：2015-11-06

Applicant: Rolls-Royce plc

Inventor： Randall D. Siders ,  Peter J. Schnoebelen ,  Brandon P. Williams ,  Neal Thomson ,  Philip E. O. Buelow ,  David H. Bretz

IPC: F02C7/32 ,  F23R3/14 ,  F23R3/34 ,  B23K33/00 ,  F02C7/22

CPC classification number: F02C7/22 ,  B23K33/006 ,  F23R3/14 ,  F23R3/28 ,  F23R3/343

Abstract: A fuel injector for a lean direct injection fuel nozzle has a pilot air swirler which sits radially outboard of a pilot fuel swirler radially outer wall. The air swirler is bounded on its radially outer side by joined wall portions. One wall portion extends axially and another wall portion converges radially. On the radially inwardly facing surface, the wall portions meet to provide a continuing wall surface of the air swirler which transitions from axial extension to radial convergence over a smooth radius. The curvature of this surface broadly mirrors the radially outwardly facing profile of the pilot fuel swirler radially outer wall. The axially extending wall portion is extended axially to form a first part of a join interface. The radially converging portion is extended in a radial direction to provide a second part of the join interface.

公开(公告)号：US20170146243A1

公开(公告)日：2017-05-25

申请号：US14948986

申请日：2015-11-23

Applicant: Rolls-Royce plc

Inventor： Randall D. Siders ,  Matthew Donovan ,  Neal Thomson ,  David H. Bretz

IPC: F23R3/28 ,  F23R3/14 ,  F02C3/04

CPC classification number: F23R3/286 ,  F02C3/04 ,  F23D2900/00018 ,  F23R3/14 ,  F23R3/28 ,  F23R3/343 ,  F23R2900/00018

Abstract: An air swirler has a radially outer wall bounding an annular passage. The radially outer wall has an axially extending portion and a radially convergent portion which converges towards an outlet of the passage. Downstream of the outlet, the passage facing surface of the radially outer wall becomes divergent. The region in which the passage facing surface of the radially outer wall is convergent then divergent defines the flare. A circumferential and axially extending recess is provided in the radially outer wall opposite the flare. A reinforcement of material with superior wear properties to the material of the main body is built in the recess to a radius which coincides with that of the outer surface of the axially extending portion of the radially outer wall. The reinforcement can conveniently be added to the main body by means of a laser consolidation ALM process.

公开(公告)号：US20170130652A1

公开(公告)日：2017-05-11

申请号：US14935004

申请日：2015-11-06

Applicant: Rolls-Royce plc

Inventor： Randall D. Siders ,  Peter J. Schnoebelen ,  Brandon P. Williams ,  Neal Thomson ,  Philip E.O. Buelow ,  David H. Bretz

IPC: F02C7/22

CPC classification number: F02C7/22 ,  B23K33/006 ,  F23R3/14 ,  F23R3/28 ,  F23R3/343

Abstract: A fuel injector for a lean direct injection fuel nozzle has a pilot air swirler which sits radially outboard of a pilot fuel swirler radially outer wall. The air swirler is bounded on its radially outer side by joined wall portions. One wall portion extends axially and another wall portion converges radially. On the radially inwardly facing surface, the wall portions meet to provide a continuing wall surface of the air swirler which transitions from axial extension to radial convergence over a smooth radius. The curvature of this surface broadly mirrors the radially outwardly facing profile of the pilot fuel swirler radially outer wall. The axially extending wall portion is extended axially to form a first part of a join interface. The radially converging portion is extended in a radial direction to provide a second part of the join interface.

公开(公告)号：US10317084B2

公开(公告)日：2019-06-11

申请号：US14948986

申请日：2015-11-23

Applicant: Rolls-Royce plc

Inventor： Randall D. Siders ,  Matthew Donovan ,  Neal Thomson ,  David H. Bretz

IPC: F23R3/14 ,  F02C3/04 ,  F23R3/28 ,  F23R3/34

Abstract: An air swirler has a radially outer wall bounding an annular passage. The radially outer wall has an axially extending portion and a radially convergent portion which converges towards an outlet of the passage. Downstream of the outlet, the passage facing surface of the radially outer wall becomes divergent. The region in which the passage facing surface of the radially outer wall is convergent then divergent defines the flare. A circumferential and axially extending recess is provided in the radially outer wall opposite the flare. A reinforcement of material with superior wear properties to the material of the main body is built in the recess to a radius which coincides with that of the outer surface of the axially extending portion of the radially outer wall. The reinforcement can conveniently be added to the main body by means of a laser consolidation ALM process.