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公开(公告)号：US11274604B2
公开(公告)日：2022-03-15
申请号：US16745921
申请日：2020-01-17
发明人： Frederick M. Schwarz , Amy R. Grace
IPC分类号： F01D19/02 , F01D25/34 , F02C7/27 , F02C7/268 , F01D25/24 , F02C3/107 , F02C7/06 , F02K3/04 , G05B15/02
摘要： A bowed rotor start mitigation system for a gas turbine engine of an aircraft is provided. The bowed rotor start mitigation system includes a motoring system and a controller coupled to the motoring system and an aircraft communication bus. The controller is configured to determine at least one inferred engine operating thermal parameter based on at least one aircraft-based parameter received on the aircraft communication bus, where the at least one inferred engine operating thermal parameter is based on data describing a history of the aircraft before an engine shutdown. The motoring system is controlled to drive rotation of a starting spool of the gas turbine engine below an engine idle speed based on determining that the at least one inferred engine operating thermal parameter is within a preselected range.
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公开(公告)号：US11187102B2
公开(公告)日：2021-11-30
申请号：US16931857
申请日：2020-07-17
IPC分类号： F01D19/02 , F04D29/66 , F01D25/34 , F01D5/02 , F04D29/52 , F16D43/30 , F16D43/04 , F01D19/00 , F02C7/268 , F02C7/26 , F02C7/277
摘要： Embodiments of systems and methods for operating a gas turbine engine defining a bowed rotor condition are generally provided. The systems and methods include rotating a rotor assembly defining a bowed rotor condition from approximately zero revolutions per minute (RPM) to within a bowed rotor mitigation speed range, in which the bowed rotor mitigation speed range is defined by a lower speed limit greater than zero RPM and an upper speed limit less than or equal to an idle speed condition of the gas turbine engine; applying a load at the rotor assembly via an energy storage device; adjusting the load to limit rotational speed or acceleration of the rotor assembly to within the bowed rotor mitigation speed range for a period of time; and removing the load to enable rotation of the rotor assembly to the idle speed condition following the period of time.
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公开(公告)号：US11131323B2
公开(公告)日：2021-09-28
申请号：US16507553
申请日：2019-07-10
摘要： A gas turbine engine includes a harmonic drive driven by an actuator, a drive shaft driven by the harmonic drive, the drive shaft with a first drive gear and a second drive gear. A first variable vane stage with a first actuator gear to direct drive one of a multiple of variable vanes, the first actuator gear meshed with the first drive gear; and a second variable vane stage with a second actuator gear to direct drive one of a multiple of variable vanes, the second actuator gear meshed with the second drive gear.
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公开(公告)号：US11060419B2
公开(公告)日：2021-07-13
申请号：US16425246
申请日：2019-05-29
发明人： Hannes Wuestenberg
摘要： The invention relates to a planetary gearbox having a ring gear support, in particular in a geared fan engine, characterized by a bolt connection for connecting the ring gear support to a static component, wherein the bolt connections are arranged on the circumference of the ring gear support in the axial direction of the planetary gearbox, and the bolt connections are designed and arranged in such a way that there is a frictional joint with a defined frictional force between the ring gear support and the static component and that a material separation, in particular a gap, is arranged between the ring gear support and the static component.
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公开(公告)号：US20200003127A1
公开(公告)日：2020-01-02
申请号：US16451606
申请日：2019-06-25
申请人： ROLLS-ROYCE plc
发明人： Mark N. BINNINGTON
摘要： A gas turbine engine, in particular an aircraft engine, includes: a turbine connected via an input shaft device to a gearbox device having a sun gear, a planet carrier having a plurality of planet gears attached thereto, and a ring gear, the sun gear is connected to the input shaft device, the planet carrier or the ring gear is connected to a propulsive fan via an output shaft device of the gearbox device, with a rear carrier bearing device radially between the planet carrier and a part on the input shaft on the input side of the gearbox device.
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公开(公告)号：US10301962B2
公开(公告)日：2019-05-28
申请号：US15079400
申请日：2016-03-24
发明人： Jesse M Chandler , Gabriel L Suciu , Joseph Stack
摘要： A gas turbine engine includes a harmonic drive driven by an actuator, a drive shaft driven by the harmonic drive, the drive shaft with a first drive gear and a second drive gear. A first variable vane stage with a first actuator gear to direct drive one of a multiple of variable vanes, the first actuator gear meshed with the first drive gear; and a second variable vane stage with a second actuator gear to direct drive one of a multiple of variable vanes, the second actuator gear meshed with the second drive gear.
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公开(公告)号：US20180283274A1
公开(公告)日：2018-10-04
申请号：US15475791
申请日：2017-03-31
申请人： The Boeing Company
CPC分类号： F02C6/14 , B64D27/16 , B64D41/00 , B64D2221/00 , F01D25/34 , F02C3/107 , F02C7/20 , F02C7/32 , F02C7/36 , F02C9/26 , F02K3/06 , F05D2220/323 , F05D2260/43 , F05D2260/941 , Y02T50/672
摘要： A mechanical flywheel used to power an aircraft system. In one example, the flywheel is used to rotate a rotor shaft in the aircraft's engine and prevent bowing of the rotor shaft caused by a thermal gradient. In another example, the mechanical flywheel provides electrical power at peak demand times. In yet another example, the flywheel is used as a load source or sink by the engine's control system so as to aid engine operability and engine acceleration rates during abnormal flight conditions.
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8.发明授权公开(公告)号：US09970328B2
公开(公告)日：2018-05-15
申请号：US14156028
申请日：2014-01-15
发明人： Axel Haerms , Felix Staehli , Marc Rauch , Eric Knopf
CPC分类号： F01D25/36 , F01D21/06 , F01D25/34 , F05D2260/4031 , F05D2270/304
摘要： A method for barring a rotor of a thermally loaded turbomachine includes stopping normal operation of the turbomachine; providing a barring device for rotating the rotor about a machine axis; coupling the barring device to the rotor; letting the rotor cool down during cool down of the rotor rotating the rotor by means of the barring device. A damage of the machine due to thermally induced buckling during the barring process is avoided by consecutively determining the force or torque applied to the rotor by the barring device for rotating the rotor and/or the circumferential speed of the rotor during barring. The rotation of the rotor is controlled by means of the barring device in dependence of the determined force or torque and/or circumferential speed in order to reduce a bending or imbalance of the rotor, which is due to a nonuniform temperature distribution on the rotor during cool down.
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公开(公告)号：US20180023413A1
公开(公告)日：2018-01-25
申请号：US15656444
申请日：2017-07-21
CPC分类号： F01D19/02 , B64D27/12 , B64D41/00 , B64D2041/002 , B64F1/364 , F01D25/34 , F02C3/04 , F02C6/20 , F02C7/277 , F02C9/00 , F05D2220/323 , F05D2220/50 , F05D2260/85 , F05D2270/303
摘要： A system is provided for multi-engine coordination of gas turbine engine motoring in an aircraft. The system includes a controller operable to determine a motoring mode as a selection between a single engine dry motoring mode and a multi-engine dry motoring mode based on at least one temperature of a plurality of gas turbine engines and initiate dry motoring based on the motoring mode.
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公开(公告)号：US09366156B2
公开(公告)日：2016-06-14
申请号：US13629736
申请日：2012-09-28
CPC分类号： F01D25/18 , F01D25/34 , F02C7/06 , F05D2260/53 , F16H57/0443 , F16H57/045 , F16H57/0495 , Y10T74/19642
摘要： A lubrication system for a fan drive gear system includes a lubricant supply and a collection conduit for drawing lubricant from within the lubricant supply. The collection conduit includes a first opening and a second opening for withdrawing lubricant and supplying lubricant to a pump. During normal operation lubricant may be drawn through both first and second openings. During negative G operating conditions a fitting at the second opening blocks the second opening to prevent air from being drawn into the lubricant system and communicated to the pump.
摘要翻译： 用于风扇驱动齿轮系统的润滑系统包括润滑剂供应和用于从润滑剂供应内抽出润滑剂的收集管道。 收集管道包括第一开口和用于抽出润滑剂并向泵供应润滑剂的第二开口。 在正常操作期间，润滑剂可以通过第一和第二开口被拉出。 在负G运行条件期间，第二开口处的配件阻塞第二开口，以防止空气被吸入润滑剂系统并传递到泵。
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