A gas turbine engine including: an exhaust diffuser including an inner tube and an outer tube that form therebetween an annular exhaust passage; a bearing chamber formed radially inside the inner tube for accommodating a bearing that supports a rotor of a turbine; a plurality of hollow struts extending across the exhaust passage; an oil introduction passage extending through one of the struts for introducing oil to be supplied to the bearing chamber; an oil drain passage extending through one of the struts for draining the oil from an exhaust oil inlet opened on a bottom surface of the bearing chamber; and an oil discharge passage for discharging a portion of the oil having passed through the oil introduction passage toward the oil drain inlet.

A method for actively calculating and monitoring the oil debris monitor phase angle includes sensing a noise from an in-line oil debris monitor sensor in an oil flow path, generating a polar plot of an I and Q channel data from only the noise. Linear regression of noise is then utilized from the I and Q channel data for calculating a slope of regression form the linear regression and converting the slope to a phase angle.

A method for actively calculating and monitoring the oil debris monitor phase angle includes sensing a noise from an in-line oil debris monitor sensor in an oil flow path, generating a polar plot of an I and Q channel data from only the noise. Linear regression of noise is then utilized from the I and Q channel data for calculating a slope of regression form the linear regression and converting the slope to a phase angle.

A bearing assembly for supporting rotation of a shaft in a turbocharger includes an inner race extending along an axis. The inner race is configured to be coupled to the shaft. The bearing assembly also includes an outer race spaced radially from the inner race and a cage disposed radially between the inner race and the outer race. The bearing assembly further includes a rolling element disposed radially between the outer race and the inner race. The rolling element is disposed within the cage for supporting rotation of the shaft. The outer race defines a lubricant passageway configured to direct lubricant toward the cage.

A bearing assembly for supporting rotation of a shaft in a turbocharger includes an inner race extending along an axis. The inner race is configured to be coupled to the shaft. The bearing assembly also includes an outer race spaced radially from the inner race and a cage disposed radially between the inner race and the outer race. The bearing assembly further includes a rolling element disposed radially between the outer race and the inner race. The rolling element is disposed within the cage for supporting rotation of the shaft. The outer race defines a lubricant passageway configured to direct lubricant toward the cage.

Provided is a rotating body, including: a shaft; and a compressor impeller including: a main body having an insertion hole, which extends from one end to another end side and is configured to receive the shaft inserted therethrough; a boss portion formed at one end side of the main body; and a joint portion, which is formed on an inner peripheral surface of the insertion hole at the boss portion and is welded to the shaft.

A system includes one or more sensors to detect unintended forward and reverse rotation of rotating machinery. The system also includes a monitoring system consisting of a processor, memory, display and communication interface. The processor receives signals from the sensors. The processor determines unintended rotation when the pattern of received signals match with the conditions defined in the processor. The processor generates a notification signal of “Unintended Rotation” on the display. The notification signal is also sent to the operator workstation to alert the operating personnel. The notification history is also stored in the system memory. The system is also configured to initiate automatic action to stop the unintended rotation and protect the machinery components from unintended rotation. The action may include closing the suction and discharge valve and starting the lubrication system to lube the bearings of the rotating machinery and the motor.

A gear assembly for use with a turbomachine comprises a sun gear, a plurality of planet gear layshafts that each support a first stage planet gear and a second stage planet gear, and a ring gear. The sun gear is configured to rotate about a longitudinal centerline of the gear assembly, and the plurality of planet gear layshafts comprise an interior passage that receives one or more lubrication supply lines.

A gear assembly for use with a turbomachine comprises a sun gear, a plurality of planet gear layshafts that each support a first stage planet gear and a second stage planet gear, and a ring gear. The sun gear is configured to rotate about a longitudinal centerline of the gear assembly, and the plurality of planet gear layshafts comprise an interior passage that receives one or more lubrication supply lines.

A bearing chamber housing (20) for bearing a shaft (3) of a turbomachine (1), including a housing outer shell (21) that delimits an oil chamber (33) of the bearing chamber housing (20) radially outwardly in relation to a rotational axis (4) of the shaft (3), and a housing inner shell (22) for bearing the shaft (3). The housing inner shell (22) is radially connected to the housing outer shell (21) via support ribs (23) that in each case extend axially, at least in part, and the housing inner shell (22), the housing outer shell (21), and two support ribs (23) that are next-adjacent to one another jointly delimit a cavity (41) that is axially open at the rear, and thus lead into a rear opening (32). The rear opening (32), viewed in tangential sections, has a clearance (35) in each case that constitutes at least 50% of a circumferential distance (43) between the next-adjacent support ribs (23).