公开(公告)号：US20190383304A1

公开(公告)日：2019-12-19

申请号：US16007647

申请日：2018-06-13

申请人： Rolls-Royce Corporation

发明人： Grace Aker ,  Michael Nesteroff ,  Mark Eric Whitlock ,  Cassandra Cummings ,  Jonathan Acker ,  Younes Khamliche ,  Nathanael Cooper

IPC分类号： F04D29/16 ,  F04D29/42 ,  F04D29/02

摘要： A centrifugal impeller shroud assembly has a dynamically moveable impeller shroud for encasing a rotatable centrifugal impeller and resolving misalignment between the impeller shroud and the rotatable centrifugal impeller. The assembly comprises a static casing, an impeller shroud, a shroud arm, and a thermal member. The shroud arm is coupled between the casing and the impeller shroud. The thermal member is coupled to the impeller shroud and has a coefficient of thermal expansion (CTE) lower than the CTE of the shroud. The shroud arm comprises a flexible portion configured to flex responsive to a differential pressure across the shroud arm.

公开(公告)号：US10704560B2

公开(公告)日：2020-07-07

申请号：US16007647

申请日：2018-06-13

申请人： Rolls-Royce Corporation

发明人： Grace Aker ,  Michael Nesteroff ,  Mark Eric Whitlock ,  Cassandra Cummings ,  Jonathan Acker ,  Younes Khamliche ,  Nathanael Cooper

IPC分类号： F04D29/16 ,  F04D29/02 ,  F04D29/42 ,  F01D11/20 ,  F01D11/08 ,  F04D29/62 ,  F01D11/24 ,  F01D11/16 ,  F01D11/18 ,  F01D11/22

摘要： A centrifugal impeller shroud assembly has a dynamically moveable impeller shroud for encasing a rotatable centrifugal impeller and resolving misalignment between the impeller shroud and the rotatable centrifugal impeller. The assembly comprises a static casing, an impeller shroud, a shroud arm, and a thermal member. The shroud arm is coupled between the casing and the impeller shroud. The thermal member is coupled to the impeller shroud and has a coefficient of thermal expansion (CTE) lower than the CTE of the shroud. The shroud arm comprises a flexible portion configured to flex responsive to a differential pressure across the shroud arm.