Abstract:
An example turbomachine geared architecture support assembly (70; 100) includes a subpart having a more compliant portion (82; 108) and a less compliant portion (78; 104). The less compliant portion (78; 104) includes a stop (88; 108) that limits axial movement of a geared architecture (48) within a turbomachine (20).
Abstract:
A gas turbine engine (20) includes a fan section (22). A turbine section (28) is coupled to the fan section (22) via a geared architecture (48). The geared architecture (48) includes a torque frame (68) and a flex support (72) spaced apart from one another at a location. A gear train is supported by the torque frame (68). A damper (78) is provided between the torque frame (68) and the flex support (72) at the location.
Abstract:
A gas turbine engine includes a fan shaft arranged along an engine central axis, a frame supporting the fan shaft, a gear system rotatably coupled with the fan shaft, and a flexible coupling at least partially supporting the gear system. The flexible coupling defines, with respect to the engine central axis, a torsional stiffness TS and a lateral stiffness LS such that a ratio of TS/LS is greater than or equal to about 2.0 to reduce loads on the gear system from misalignment of the gear system with respect to the engine central axis.
Abstract:
A lubricant manifold for gear system of a turbofan engine includes a base plate defining an inlet, an outlet and a plurality of open channels. The open channels define a portion of a corresponding plurality of lubricant passages. A cover plate is attached to the base plate to complete the formation of the plurality of lubricant passages. An interlocking interface between the base plate and the cover plate secures the cover plate to the base plate.
Abstract:
An exemplary gear assembly support for use in a gas turbine engine includes a support member having a portion that is configured to be coupled to a gear assembly. Another portion of the support member is configured to be coupled to a housing in a gas turbine engine. The support member includes a plurality of removal features that each have a plurality of engaging surfaces to facilitate a pulling force on the support member in a direction parallel to an axis through a center of the support member. The engaging surfaces on each of the removal features are oriented relative to each other to resist any bending moment on the support member during application of the pulling force.
Abstract:
A fan drive gear system for a turbofan engine includes a geared architecture and a gear controller supporting the geared architecture and controlling rotation of the geared architecture relative a static structure.
Abstract:
A control system for turbofan engine includes a first sensor measuring rotation of a first shaft at a first location and a fan shaft sensor measuring a speed of a fan shaft. A controller utilizes measurements of a first speed of the first shaft from the first sensor and a second speed of the fan shaft driven by a geared architecture and rotating at a speed different than the first shaft. The controller determines that one of the first shaft and the fan shaft are outside predetermined deformation limits responsive to a difference between an actual difference between the first and second speeds and a calculated expected difference between speeds of the first shaft and the fan shaft.