公开(公告)号：EP3084142A4

公开(公告)日：2017-02-01

申请号：EP14872285

申请日：2014-11-07

Applicant: UNITED TECHNOLOGIES CORP

Inventor： LABOUDY CRYSTAL ,  TRAVIS BRITTANY ,  WOOD MARK R

IPC: F01D17/16 ,  F04D29/40

CPC classification number: F04D19/022 ,  F01D17/162 ,  F04D27/002 ,  F04D29/563 ,  Y02T50/671

Abstract: A variable vane assembly comprises an upstream vane stage including an airfoil coupled with an upstream vane stem and an upstream vane arm, configured to drive the upstream vane stem to rotate. The upstream vane stem is supported in an upstream housing boss. A downstream vane stage includes an airfoil coupled with a downstream vane stem and a downstream vane arm, and configured to drive the downstream vane stem to rotate. The downstream vane stem is supported in a downstream housing boss. A first clearance is defined between a radially inner end of the upstream vane arm and a radially outer end of the upstream housing boss. A second clearance is defined between a radially inner end of the downstream vane arm and a radially outer end of the downstream housing boss. A clearance ratio of the second clearance to the first clearance is greater than or equal to 10.

Abstract translation: 可变叶片组件包括上游叶片台，其包括与上游叶片杆和上游叶片臂联接的翼型件，构造成驱动上游叶片杆旋转。 上游叶片杆支撑在上游壳体凸台中。 下游叶片级包括与下游叶片杆和下游叶片臂联接的翼型件，并且构造成驱动下游叶片杆旋转。 下游叶片杆支撑在下游壳体凸台中。 在上游叶片臂的径向内端和上游壳体凸起的径向外端之间限定第一间隙。 第二间隙限定在下游叶片臂的径向内端和下游壳体凸起的径向外端之间。 第二间隙与第一间隙的间隙比大于或等于10。