公开(公告)号：US09816436B2

公开(公告)日：2017-11-14

申请号：US14283610

申请日：2014-05-21

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： Jorn A. Glahn ,  William K. Ackermann ,  Clifton J. Crawley ,  Philip S. Stripinis

IPC: F02C6/08 ,  F02C7/14 ,  F01D25/18 ,  F02C7/12

CPC classification number: F02C6/08 ,  F01D25/18 ,  F01D25/183 ,  F02C7/12 ,  F02C7/14 ,  F05D2260/601 ,  Y02T50/675

Abstract: A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a shaft, a first bearing structure and a second bearing structure that support the shaft. Each of the first bearing structure and the second bearing structure includes a bearing compartment that contains a lubricant and a seal that contains the lubricant within the bearing compartments. A buffer system is configured to pressurize the seals to prevent the lubricant from escaping the bearing compartments. The buffer system includes a first circuit configured to supply a first buffer supply air to the first bearing structure, a second circuit configured to supply a second buffer supply air to the second bearing structure, and a controller configured to select between at least two bleed air supplies to communicate the first buffer supply air and the second buffer supply air.

公开(公告)号：US20140318143A1

公开(公告)日：2014-10-30

申请号：US14283610

申请日：2014-05-21

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： Jorn A. Glahn ,  William K. Ackermann ,  Clifton J. Crawley ,  Philip S. Stripinis

IPC: F02C6/08 ,  F02C7/14

CPC classification number: F02C6/08 ,  F01D25/18 ,  F01D25/183 ,  F02C7/12 ,  F02C7/14 ,  F05D2260/601 ,  Y02T50/675

Abstract: A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a shaft, a first bearing structure and a second bearing structure that support the shaft. Each of the first bearing structure and the second bearing structure includes a bearing compartment that contains a lubricant and a seal that contains the lubricant within the bearing compartments. A buffer system is configured to pressurize the seals to prevent the lubricant from escaping the bearing compartments. The buffer system includes a first circuit configured to supply a first buffer supply air to the first bearing structure, a second circuit configured to supply a second buffer supply air to the second bearing structure, and a controller configured to select between at least two bleed air supplies to communicate the first buffer supply air and the second buffer supply air.

Abstract translation: 根据本公开的示例性方面的燃气涡轮发动机尤其包括支撑轴的轴，第一轴承结构和第二轴承结构。 第一轴承结构和第二轴承结构中的每一个包括轴承室，其包含润滑剂和在轴承隔室内容纳润滑剂的密封件。 缓冲系统被配置为对密封件加压以防止润滑剂从轴承隔间逸出。 缓冲系统包括被配置为向第一轴承结构提供第一缓冲器供应空气的第一电路，被配置为将第二缓冲器供应空气供应到第二轴承结构的第二电路以及被配置为在至少两个放气 用于通信第一缓冲器供应空气和第二缓冲器供应空气。