公开(公告)号：US20200003073A1

公开(公告)日：2020-01-02

申请号：US16419286

申请日：2019-05-22

Applicant: ROLLS-ROYCE plc

Inventor： Neelambaran KARAPURATH ,  Robert J. KYLE

IPC: F01D17/16 ,  F01D9/04

Abstract: A variable stator vane arrangement is provided in which the variable stator vanes extend from a first end at a radially inner flow boundary to a second end at a radially outer flow boundary. At least one of the radially inner flow boundary and the radially outer flow boundary is faceted, such that the surface of the faceted flow boundary comprises flat portions at the interfaces with the respective first or second end of each stator vane. The flat portions mean that the tips of the variable stator vanes can be made substantially flush with the flat casing portions. This may improve aerodynamic efficiency and/or increase the design flexibility on where to position the pivot axis of the variable stator vanes.

公开(公告)号：US20190277154A1

公开(公告)日：2019-09-12

申请号：US16281558

申请日：2019-02-21

Applicant: ROLLS-ROYCE plc

Inventor： Robert J. KYLE

IPC: F01D17/16 ,  F01D9/04

Abstract: There is disclosed a variable vane actuation arrangement 100 comprising a unison ring 34 configured to pivot a plurality of variable vanes 26 and a drive assembly 102 for driving rotation of the unison ring 34, comprising a drive 104 and a flexible line 106 extending from a ring anchor point 110 on the unison ring 34 to the drive 104. The ring anchor point 110 is positioned such that a portion of the flexible line 106 extending towards the drive 104 wraps around the unison ring 34, whereby tension in the flexible line 106 is applied to the ring anchor point 110 in a direction tangential to the unison ring 34.