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公开(公告)号：US11248523B2
公开(公告)日：2022-02-15
申请号：US16676112
申请日：2019-11-06
Applicant: UNITED TECHNOLOGIES CORPORATION
Inventor： Nicholas D. Leque , Joseph H. Polly
Abstract: A power extraction system for a gas turbine engine may comprise a low spool transmission and a low spool accessory gearbox. The low spool accessory gearbox may comprise a generator and a dual clutch transmission. The dual clutch transmission may be coupled between the low spool transmission and the generator.
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公开(公告)号：US20210131347A1
公开(公告)日：2021-05-06
申请号：US16676112
申请日：2019-11-06
Applicant: UNITED TECHNOLOGIES CORPORATION
Inventor： Nicholas D. Leque , Joseph H. Polly
Abstract: A power extraction system for a gas turbine engine may comprise a low spool transmission and a low spool accessory gearbox. The low spool accessory gearbox may comprise a generator and a dual clutch transmission. The dual clutch transmission may be coupled between the low spool transmission and the generator.
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公开(公告)号：US10890115B2
公开(公告)日：2021-01-12
申请号：US16145518
申请日：2018-09-28
Applicant: United Technologies Corporation
Inventor： Joseph H. Polly , Nicholas D. Leque
Abstract: A disclosed turbofan engine includes a first spool including a first turbine; a second spool including a second turbine disposed axially forward of the first turbine, a first tower shaft engaged to the first spool, a second tower shaft engaged to the second spool, and a superposition gearbox including a sun gear, a plurality of intermediate gears engaged to the sun gear and supported in a carrier and a ring gear circumscribing the intermediate gears. The second tower shaft is engaged to drive the sun gear. A starter is selectively coupled to the sun gear through a starter clutch. A first clutch selectively couples the first tower shaft to the ring gear and a second clutch selectively couples the ring gear to a static structure of the engine. An accessory gearbox is driven by an output of the superposition gearbox.
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公开(公告)号：US20200300117A1
公开(公告)日：2020-09-24
申请号：US16356082
申请日：2019-03-18
Applicant: United Technologies Corporation
Inventor： Joseph H. Polly , Sean P. McGee
Abstract: A seal assembly for a gas turbine engine according to an example of the present disclosure includes, among other things, a rotatable shaft defining a longitudinal axis, and a bearing housing extending along the longitudinal axis to define a bearing compartment. The bearing housing has a first seal land defined along an inner diameter of the bearing housing, a seal carrier fixedly attached to an outer periphery of the shaft, and a seal member extending outwardly from the seal carrier. The seal member defines a plurality of helical grooves facing radially outward to establish a first sealing relationship with the first seal land, and each one of the helical grooves has a major component extending in an axial direction relative to the longitudinal axis. A method of sealing for a gas turbine engine is also disclosed.
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公开(公告)号：US11248532B2
公开(公告)日：2022-02-15
申请号：US16751287
申请日：2020-01-24
Applicant: United Technologies Corporation
Inventor： Nicholas D. Leque , Joseph H. Polly
Abstract: A turbofan engine includes a first spool including a first turbine and a second spool including a second turbine. A superposition gear system includes a plurality of intermediate gears engaged to a sun gear and supported in a carrier and a ring gear circumscribing the intermediate gears. A second tower shaft is engaged to drive the sun gear. A starter is selectively coupled to the sun gear through a starter clutch. A first electric motor and a second electric motor are coupled to the superposition gear system and are operable to input power into a corresponding one of the first and second spools.
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Patent Agency Ranking
公开(公告)号：US20210102499A1
公开(公告)日：2021-04-08
申请号：US16591716
申请日：2019-10-03
Applicant: United Technologies Corporation
Inventor： Nicholas D. Leque , Joseph H. Polly
Abstract: A gas turbine engine including a low speed spool including a low pressure compressor, a low speed output gear disposed on the low speed spool, a high speed spool including a high pressure compressor, a high speed output gear disposed on the high speed spool, a first tower shaft engaged to the low speed spool at the low speed output gear, a second tower shaft engaged to the high speed spool at the high speed output gear, and a superposition gearbox. The gas turbine engine further including a ring gear shaft coupled to drive the ring gear, a ring gear shaft drive gear. A low speed spool drive train gear ratio is between 0.5 to 2.0, the low speed spool drive train gear ratio being measured from the low speed output gear to the ring gear shaft drive gear.
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公开(公告)号：US20200291817A1
公开(公告)日：2020-09-17
申请号：US16353094
申请日：2019-03-14
Applicant: UNITED TECHNOLOGIES CORPORATION
Inventor： Nicholas D. Leque , Joseph H. Polly
Abstract: A turbofan engine includes a first spool including a first turbine, a second spool including a second turbine, and a fan. A fan drive gear system drives the fan. A first tower shaft engages the first spool, and a second tower shaft engages the second spool. A superposition gear system includes intermediate gears engaged to the sun gear and supported in a carrier and a ring gear circumscribing the intermediate gears. The first tower shaft drives the sun gear. A main oil pump is driven by the carrier and supplies oil to the fan drive gear system. An auxiliary oil pump supplies oil to the fan drive gear system and is driven by a ring gear shaft coupled to the ring gear. A shuttle valve selectively allows oil to be supplied to the fan drive gear system by one of the main oil pump and the auxiliary oil pump.
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公开(公告)号：US20200248632A1
公开(公告)日：2020-08-06
申请号：US16751287
申请日：2020-01-24
Applicant: United Technologies Corporation
Inventor： Nicholas D. Leque , Joseph H. Polly
Abstract: A turbofan engine includes a first spool including a first turbine and a second spool including a second turbine. A superposition gear system includes a plurality of intermediate gears engaged to a sun gear and supported in a carrier and a ring gear circumscribing the intermediate gears. A second tower shaft is engaged to drive the sun gear. A starter is selectively coupled to the sun gear through a starter clutch. A first electric motor and a second electric motor are coupled to the superposition gear system and are operable to input power into a corresponding one of the first and second spools.
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公开(公告)号：US20200158213A1
公开(公告)日：2020-05-21
申请号：US16197605
申请日：2018-11-21
Applicant: United Technologies Corporation
Inventor： Nicholas D. Leque , Michael E. McCune , Joseph H. Polly
Abstract: A gas turbine engine includes a core engine, a fan section, and a superposition gearbox that includes a sun gear. A plurality of intermediate gears are engaged to the sun gear and supported in a carrier and a ring gear circumscribing the intermediate gears. The core engine drives the sun gear and an output from the superposition gearbox driving the fan section. An electric motor is coupled to a portion of the superposition gearbox to provide a portion of power to drive the fan section through the superposition gearbox.
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公开(公告)号：US11319837B2
公开(公告)日：2022-05-03
申请号：US17035872
申请日：2020-09-29
Applicant: UNITED TECHNOLOGIES CORPORATION
Inventor： Nicholas D. Leque , Joseph H. Polly
IPC: F01D25/20 , F01M1/02 , F01M11/06 , F02C7/32 , F02C7/36 , F02K3/06 , F16H1/28 , F16H57/04 , F01D15/08 , F01D15/12
Abstract: An engine includes a spool including a turbine, a second spool including a second turbine, a fan, and a fan drive gear system. A tower shaft is engaged to the spool. A second tower shaft is engaged to the second spool. A superposition gear system includes a plurality of intermediate gears engaged to the sun gear and supported in a carrier and a ring gear circumscribing the intermediate gears. The tower shaft drives the sun gear. An oil pump is driven by the carrier and supplies oil to the fan drive gear system from an oil tank through a first pickup at a first end of the oil tank and a second pickup at a second, opposite end of the oil tank. A shuttle valve at a suction side of the oil pump selectively allows oil to be supplied by one of the first and second pickup.
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