Abstract: A tower shaft support for a gearbox of a gas turbine engine includes a mounting ring, first and second gussets, and first and second tower shaft bearing mounts. Each gusset extends outward from and substantially normal to an outer circumference of the mounting ring. The first and second tower shaft bearing mounts are positioned between the first and second gussets.

Abstract: A damped anti-rotational system is provided comprising a pawl carrier having an axis of rotation, a pawl pivotably mounted to the pawl carrier on a pivot joint, the pawl having a contact portion and a counterweight portion, a stop pin axially disposed in the pawl carrier and configured to contact the contact portion of the pawl in response to radially inward movement of the pawl, wherein the stop pin is mounted to the pawl carrier at a forward portion of the stop pin and an aft portion of the stop pin, wherein a forward O ring is disposed on the forward portion of the stop pin and an aft O ring is disposed on the aft portion of the stop pin.

Abstract: A system is provided that includes a support structure and a nozzle. The support structure includes a cavity surface and an aperture. The cavity surface at least partially forms a boundary of a cavity. The aperture extends partially into the support structure from the cavity surface. The nozzle includes a mount, a neck and a head. The mount is seated within the aperture. The neck is connected to the mount and extends axially along a centerline away from the surface to the head. The head is configured to inject fluid out of the nozzle and into the cavity.

Abstract: A lubricating fluid damped anti-rotational system is provided comprising a pawl carrier having an axis of rotation and a radial aperture, a pawl pivotably mounted to the pawl carrier on a pivot joint, the pawl having a contact portion and a counterweight portion, a lubricating fluid jet configured to propel a lubricating fluid through the radial aperture toward the contact portion.

Abstract: A lubricating fluid damped anti-rotational system is provided comprising a pawl carrier having an axis of rotation and a radial aperture, a pawl pivotably mounted to the pawl carrier on a pivot joint, the pawl having a contact portion and a counterweight portion, a lubricating fluid jet configured to propel a lubricating fluid through the radial aperture toward the contact portion.

Abstract: A sealing apparatus for rotational equipment includes an annular seal plate rotatable around an axis. The annular seal plate includes an annular seal land surface, an internal plenum, a plurality of inlet passages, a plurality of cooling passages and a plurality of outlet passages. The inlet passages are arranged about the axis. Each of the inlet passages extends into the annular seal plate to the internal plenum. The cooling passages are arranged about the axis. Each of the cooling passages extends into the annular seal plate from the annular seal land surface to the internal plenum. The outlet passages are arranged about the axis. Each of the outlet passages extends into the annular seal plate to the internal plenum. The outlet passages are arranged radially between the inlet passages and the cooling passages.

Abstract: A bearing spring support/damping apparatus has: a first end portion; a second end portion; and a flexible portion between the first end portion and the second end portion, and further comprising: an outer diameter groove in an outer diameter surface of the second end portion, and a radially and axially outwardly open rebate in the second end portion.

Abstract: Aspects of the disclosure are directed to a gear comprising: gear teeth, a cone wall having an interior surface that forms a chamber, where the gear teeth extend circumferentially from a distal end of the cone wall, a dam that extends radially inward on the interior surface and is axially disposed between the cone wall and the gear teeth, and at least one aperture formed in the cone wall to allow fluid on the interior surface to exit the chamber, where the at least one aperture is located a first distance from the gear teeth along a length of the gear and the dam is located a second distance from the gear teeth along the length of the gear, and where the first distance is greater than the second distance.

Abstract: A baffle includes a disk, a rim, a peripheral portion, and an outlet. The rim is connected to and circumferentially surrounds a portion of the disk. The peripheral portion is connected to and circumferentially surrounds the rim. The peripheral portion forms a channel. The outlet is fluidly connected to the channel of the peripheral portion. The outlet includes a cover and a series of openings. The cover caps a distal end of the outlet. The series of openings is disposed on a portion of the outlet and is fluidly connected to the channel via the outlet.

Abstract: A damped anti-rotational system is provided comprising a pawl carrier having an axis of rotation, a pawl pivotably mounted to the pawl carrier on a pivot joint, the pawl having a contact portion and a counterweight portion, a stop pin axially disposed in the pawl carrier and configured to contact the contact portion of the pawl in response to radially inward movement of the pawl, wherein the stop pin is mounted to the pawl carrier at a forward portion of the stop pin and an aft portion of the stop pin, wherein a forward O ring is disposed on the forward portion of the stop pin and an aft O ring is disposed on the aft portion of the stop pin.

Abstract: A damped anti-rotational system is provided comprising a pawl carrier having an axis of rotation, a pawl pivotably mounted to the pawl carrier on a pivot joint, the pawl having a contact portion and a counterweight portion, a stop pin axially disposed in the pawl carrier and configured to contact the contact portion of the pawl in response to radially inward movement of the pawl, wherein the stop pin is mounted to the pawl carrier at a forward portion of the stop pin and an aft portion of the stop pin, wherein a forward O ring is disposed on the forward portion of the stop pin and an aft O ring is disposed on the aft portion of the stop pin.

Abstract: A seal assembly for a bearing compartment includes a coupler with a lip, seal plate, nut, and air seal land. The seal plate is disposed on and around the coupler and is in contact with the lip. The nut is disposed within the bearing compartment and adjoining the seal plate. The nut includes first, second, and third major portions and first and second intermediate portions. Each of the first, second, and third major portions is in the shape of an annular band. The second major portion is disposed axially between the first and third major portions. The third major portion includes a knife edge seal extending radially outward. The first and second intermediate portions include frustums and extend between the first and second major portions and second and third major portions, respectively. The air seal land is sealingly engaged with the third major portion of the nut.

Abstract: A baffle for use with one or both bevel gears in a transmission system is disclosed that can include a rim having a frustoconical shape, multiple pockets on an inner side of the rim configured to collect lubricant, and multiple slots extending through the rim with each slot of the multiple slots being adjacent to a corresponding pocket of the multiple pockets and configured to allow lubricant to flow through the rim. A transmission system is also disclosed that can include a first gear, a second gear, and a baffle surrounding gear teeth of the first or second gear. The baffle has a plurality of pockets adjacent to the gear teeth and a plurality of slots adjacent to the plurality of pockets with the plurality of slots extending through the baffle.

Abstract: An assembly is provided for a gas turbine engine. This assemble includes a stationary structure configured with a first side, a second side and a bore that extends through the stationary structure between the first side and the second side. The assembly also includes a fluid transfer tube extending within the bore and forming a plenum between a sidewall of the fluid transfer tube and the stationary structure. The fluid transfer tube is configured with a first end at the first side, a second end at the second side, a flowpath and an aperture. The flowpath is at least partially formed by the sidewall and extends through the fluid transfer tube between the first end and the second end. The aperture fluidly couples the flowpath with the plenum.

Abstract: A transmission system may include a first bevel gear, a second bevel gear and a baffle. The second bevel gear is meshed with the first bevel gear, and includes a plurality of gear teeth arranged in a circumferential array. The baffle includes a baffle wall and a baffle outlet. The baffle wall is arranged next to and covers a subset of the gear teeth. The baffle outlet forms a lubricant outlet passage that extends through the baffle wall.

Abstract: A gear assembly is provided. The gear assembly includes a first gear that rotates about a first axis and includes a first gear face with a plurality of first gear teeth; a second gear that rotates about a second axis and includes a second gear face with a plurality of second gear teeth, where the first axis is not parallel with the second axis and the first and second teeth rotatably engage as the first gear rotates about the first axis and the second gear rotates about the second axis; a scraper that includes a distal interference surface in face-to-face proximity with at least one of the first plurality of teeth as the first gear rotates about the first axis, where the interference surface removes oil entrained adjacent to the plurality of first or second gear teeth as the first or second gears rotate.

Abstract: An insulated seal seat assembly comprises a shaft configured and arranged to rotate about an axial axis, a seal seat that is secured to the shaft, and a thermal insulator configured and arranged radially between the shaft and the seal seat.

Abstract: A seal assembly for a bearing compartment includes a coupler with a lip, seal plate, nut, and air seal land. The seal plate is disposed on and around the coupler and is in contact with the lip. The nut is disposed within the bearing compartment and adjoining the seal plate. The nut includes first, second, and third major portions and first and second intermediate portions. Each of the first, second, and third major portions is in the shape of an annular band. The second major portion is disposed axially between the first and third major portions. The third major portion includes a knife edge seal extending radially outward. The first and second intermediate portions include frustums and extend between the first and second major portions and second and third major portions, respectively. The air seal land is sealingly engaged with the third major portion of the nut.

Abstract: A seal assembly for a bearing compartment of a gas turbine engine includes a seal carrier, a seal element, a seal plate, and a trough. At least a portion of the seal element is within the seal carrier. The seal plate is in contact with the seal element and is configured to rotate relative to the seal element. The trough extends around the seal plate and comprises an annular channel positioned to capture oil slung from the seal plate.

Abstract: A sealing apparatus for rotational equipment includes an annular seal plate rotatable around an axis. The annular seal plate includes an annular seal land surface, an internal plenum, a plurality of inlet passages, a plurality of cooling passages and a plurality of outlet passages. The inlet passages are arranged about the axis. Each of the inlet passages extends into the annular seal plate to the internal plenum. The cooling passages are arranged about the axis. Each of the cooling passages extends into the annular seal plate from the annular seal land surface to the internal plenum. The outlet passages are arranged about the axis. Each of the outlet passages extends into the annular seal plate to the internal plenum. The outlet passages are arranged radially between the inlet passages and the cooling passages.