公开(公告)号：US11511876B2

公开(公告)日：2022-11-29

申请号：US16208048

申请日：2018-12-03

Applicant: Bell Helicopter Textron Inc.

Inventor： Russell L Mueller ,  Tyson Henry ,  Colton Gilliland

IPC: B64D35/00 ,  B64C29/00 ,  F16H57/032 ,  F16H57/04 ,  F16H57/02 ,  B33Y10/00 ,  B33Y80/00

Abstract: Briefly, the disclosure relates to apparatuses and methods to form a gearbox enclosure comprising an external liner, an internal liner, and a variable porosity region disposed between the external liner and the internal liner. The variable porosity region may be configured to accommodate flow of the lubricant, thereby providing a capability to cool, for example, a lubricating fluid at an elevated temperature.