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公开(公告)号：US11339678B2
公开(公告)日：2022-05-24
申请号：US16039475
申请日：2018-07-19
发明人： Matthew R. Feulner
摘要： A system for controlling blade tip clearances in a gas turbine engine may comprise an active clearance control system and a controller in operable communication with the active clearance control system. The controller may be configured to identify a cruise condition, reduce a thrust limit of the gas turbine engine to a de-rated maximum climb thrust, determine a first target tip clearance based on the de-rated maximum climb thrust, and send a command signal correlating to the first target tip clearance to the active clearance control system.
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公开(公告)号：US11313325B2
公开(公告)日：2022-04-26
申请号：US16085441
申请日：2017-03-15
摘要： A turbofan having a dilution rate of at least 10 and including a fan having a disc provided with blades at the periphery thereof, a distance between the head of the blades and the housing of the fan being less than or equal to ten millimeters; a primary flow space and secondary flow space that are concentric; a turbine, housed in the primary flow space and in fluid communication with the fan; and a reduction mechanism coupling the turbine and the fan.
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公开(公告)号：US11236631B2
公开(公告)日：2022-02-01
申请号：US16195336
申请日：2018-11-19
摘要： Systems and methods are provided that use a tip clearance control apparatus comprising a mechanical iris, where the tip clearance control apparatus controls a distance between a tip of a blade and a ring of abradable material positioned in an adjustable opening of the mechanical iris.
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公开(公告)号：US10794213B2
公开(公告)日：2020-10-06
申请号：US15398206
申请日：2017-01-04
摘要： A compressor shroud assembly in a turbine engine having a dynamically moveable shroud for encasing a rotor segment. The rotor segment comprises a bladed disc. The compressor shroud assembly maintains a clearance gap between the shroud and the blade tips of the bladed disc. The assembly comprises a static compressor casing, a shroud mounted to the casing, and an actuator mounted to the casing. The shroud comprises a flowpath boundary member spaced radially inward from the casing, the flowpath boundary member being moveable relative to the casing in a radial direction. The actuator is coupled to the shroud for effecting the movement of the flowpath boundary member.
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公开(公告)号：US10760442B2
公开(公告)日：2020-09-01
申请号：US15869489
申请日：2018-01-12
摘要： An apparatus for sealing a circumferential gap between a stationary component and a rotating member is disclosed. The rotating member is configured to rotate about a longitudinal axis and has a radially outer surface disposed at a first non-zero angle with respect to the longitudinal axis. The apparatus includes a stator disposed circumferentially about the longitudinal axis and a shoe configured for translation in a radial direction with respect to the stator. The shoe includes a circumferential surface and a plurality of protrusions extending radially inward from the circumferential surface toward the rotating member, each one of the plurality of protrusions having a length configured to maintain a clearance gap with respect to the rotating member.
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公开(公告)号：US10704560B2
公开(公告)日：2020-07-07
申请号：US16007647
申请日：2018-06-13
发明人： Grace Aker , Michael Nesteroff , Mark Eric Whitlock , Cassandra Cummings , Jonathan Acker , Younes Khamliche , Nathanael Cooper
IPC分类号： F04D29/16 , F04D29/02 , F04D29/42 , F01D11/20 , F01D11/08 , F04D29/62 , F01D11/24 , F01D11/16 , F01D11/18 , F01D11/22
摘要： A centrifugal impeller shroud assembly has a dynamically moveable impeller shroud for encasing a rotatable centrifugal impeller and resolving misalignment between the impeller shroud and the rotatable centrifugal impeller. The assembly comprises a static casing, an impeller shroud, a shroud arm, and a thermal member. The shroud arm is coupled between the casing and the impeller shroud. The thermal member is coupled to the impeller shroud and has a coefficient of thermal expansion (CTE) lower than the CTE of the shroud. The shroud arm comprises a flexible portion configured to flex responsive to a differential pressure across the shroud arm.
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公开(公告)号：US10655475B2
公开(公告)日：2020-05-19
申请号：US15352468
申请日：2016-11-15
申请人： ROLLS-ROYCE plc
发明人： Alan R Maguire , Timothy J Scanlon
IPC分类号： F01D11/24 , F02C7/18 , F01D9/04 , F01D25/12 , F01D25/24 , F02C9/18 , F01D11/20 , F01D11/14 , F02C7/12 , F01D5/18 , F02C3/10 , F16K1/22 , F23R3/00
摘要： A gas turbine engine includes a turbine and a turbine cooling arrangement. The turbine includes a turbine rotor surrounded by a static rotor track liner, and a nozzle guide vane downstream of the rotor in a core main gas flow path. The cooling arrangement includes a first air duct that provides cooling airflow to a rotor track liner cooling plenum and a second air duct that provides a cooling airflow to the nozzle guide vane. A common manifold is upstream in the cooling airflow of the ducts and provides cooling air to the ducts. A two-way valve modulates air provided to the ducts from the manifold. The valve is operates in a first or second mode. In the first mode, air flow to the first duct is relatively high and airflow to the second duct is relatively low compared to where the valve is operated in the second mode.
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公开(公告)号：US10458281B2
公开(公告)日：2019-10-29
申请号：US15620257
申请日：2017-06-12
发明人： Brian Tripodina
IPC分类号： F01D25/00 , F01D25/28 , F01D25/24 , F01D11/20 , F01D11/24 , F01D25/04 , F01D25/14 , F16B5/02
摘要： An assembly is provided for a turbine engine that includes a first mounting bracket, a second mounting bracket and a first resilient mount attaching the second mounting bracket to the first mounting bracket. The first resilient mount includes a first isolator support, a second isolator support, a first isolator, a second isolator and a fastener. The first isolator support and the second isolator support are arranged on opposing sides of the second mounting bracket. The first isolator support is between the second mounting bracket and the first isolator. The second isolator support is between the second mounting bracket and the second isolator. The first isolator is between the first isolator support and the first mounting bracket. The fastener projects through the first mounting bracket, the second mounting bracket, the first isolator support, the second isolator support, the first isolator and the second isolator.
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129.发明授权公开(公告)号：US10370999B2
公开(公告)日：2019-08-06
申请号：US14780838
申请日：2014-02-06
摘要： An active clearance control system of a gas turbine engine includes an air seal segment with a bridge hook having a lugged aperture.
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公开(公告)号：US10294811B2
公开(公告)日：2019-05-21
申请号：US15220960
申请日：2016-07-27
申请人： ROLLS-ROYCE plc
发明人： Daniel L Morrill
IPC分类号： F01D11/12 , F04D29/64 , F01D11/24 , F01D25/24 , F04D29/58 , F04D29/52 , F04D29/16 , F01D11/20 , F01D21/00 , F01D11/22 , F04D27/00
摘要： A method of calibrating a rotor tip clearance arrangement that includes measuring a rotor parameter indicative of rotor efficiency and altering a position of a tip clearance control actuator by an increment to reduce the rotor tip clearance. The method further includes iterating the measuring and altering, and calculating a rate of change of the rotor parameter between pairs of iterations. The method further includes identifying a knee point where the rate of change of the rotor parameter changes and record the corresponding tip clearance control actuator position as a calibrated position. Also included is a rotor tip clearance arrangement calibrated by the method and a method of monitoring deterioration of a rotor tip clearance arrangement.
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