Secondary air system with venturi

    公开(公告)号:US10100730B2

    公开(公告)日:2018-10-16

    申请号:US14644503

    申请日:2015-03-11

    摘要: A gas turbine engine including a secondary air system with interconnected fluid passages defining at least one flow path between a common source of pressurized air and a common outlet. Some of the fluid passages deliver the pressurized air to components of the gas turbine engine. The fluid passages include a common fluid passage through which all circulation of the pressurized air to the common outlet passes. The common fluid passage has a section including a venturi configured for controlling a flow of the pressurized air from the source to the outlet. In one embodiment, the venturi is provided in a common inlet or common outlet passage. A method of pressurizing a secondary air system is also discussed.

    Method and system for regulating oil flow to an engine

    公开(公告)号:US11371436B2

    公开(公告)日:2022-06-28

    申请号:US16744289

    申请日:2020-01-16

    IPC分类号: F02C7/06 F01M1/16 F02C9/24

    摘要: Systems and methods for regulating oil flow to an engine are described herein. An oil pressure target for the engine is determined based on one or more engine operating parameters. Oil flow to the engine is controlled based on the oil pressure target. Closed-loop feedback of oil pressure of the engine is obtained from at least one sensor during the controlling of the oil flow to the engine. A pressure difference between the oil pressure target and the closed-loop feedback of the oil pressure of the engine is determined. The oil flow to the engine is adjusted based on the pressure difference.

    Labyrinth seal with angled fins
    9.
    发明授权

    公开(公告)号:US11293295B2

    公开(公告)日:2022-04-05

    申请号:US16570066

    申请日:2019-09-13

    摘要: An aircraft engine having a shaft, an engine casing, at least one bearing located between the shaft and the engine casing, the engine casing defining a bearing cavity containing the at least one bearing, an air distribution system configured to inject compressed air to the bearing cavity to in use provide a sealing air flow entering the bearing cavity, and a labyrinth seal having a seal rotor and a seal stator, fins extending from one of the seal rotor and the seal stator toward the other of the seal rotor and the seal stator, at least one of the fins extending in an angled upstream direction relative to a direction of the sealing air flow.