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公开(公告)号：US11608784B2
公开(公告)日：2023-03-21
申请号：US16274340
申请日：2019-02-13
Applicant: United Technologies Corporation
Inventor： Hung Duong , Marc J. Muldoon , Gabriel L. Suciu
Abstract: A gas turbine engine has a low speed input shaft drives a first plurality of accessories. A high speed input shaft drives a second plurality of accessories. The first plurality of accessories rotating about a first set of rotational axes perpendicular to a first plane. The second plurality of accessories rotating about a second set rotational axes perpendicular to a second plane. The first and second planes extending in opposed directions away from a drive input axis. Compressed air is tapped and passes through a heat exchanger, then to a boost compressor, and then to at least one rotatable components in a main compressor section and a main turbine section. The boost compressor driven on a boost axis, which is non-parallel to the first set of rotational axes and the second set of rotational axes.
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公开(公告)号：US11022036B2
公开(公告)日：2021-06-01
申请号：US16431050
申请日：2019-06-04
Applicant: United Technologies Corporation
Inventor： Marc J. Muldoon
Abstract: A turbofan engine includes a fan rotatable about an axis, a compressor section, a combustor in fluid communication with the compressor section, a turbine section in fluid communication with the combustor, a fan drive gear system including a carrier for supporting a plurality of gears, and a scupper capturing lubricant during gear operation and directing lubricant into the carrier. A fan drive gear system is also disclosed.
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公开(公告)号：US10927709B2
公开(公告)日：2021-02-23
申请号：US16000223
申请日：2018-06-05
Applicant: United Technologies Corporation
Inventor： Marc J. Muldoon , Gregory E. Reinhardt
Abstract: A gas turbine includes a shaft, a turbine coupled with the shaft for rotation with the shaft, and a bearing coupled with the shaft to facilitate rotation of the shaft. A bearing nut is adjacent the bearing on the shaft. The turbine has a first load path and the bearing has a second load path. The bearing nut exerts a force on the bearing such that the first load path is not aligned with the second load path relative to a central axis of the gas turbine engine. A method of assembling a gas turbine engine is also disclosed.
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公开(公告)号：US10450891B2
公开(公告)日：2019-10-22
申请号：US15227603
申请日：2016-08-03
Applicant: United Technologies Corporation
Inventor： Nathan D. Korn , Marc J. Muldoon
Abstract: Aspects of the disclosure are directed to a cover configured to substantially conform to a profile of a first assembly of an engine in terms of the dimensions of the first assembly and hermetically seal the first assembly such that a second assembly of the engine that is external to the cover is accessible, a container containing a desiccant, and a screen coupled to the container.
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公开(公告)号：US20190218977A1
公开(公告)日：2019-07-18
申请号：US15873138
申请日：2018-01-17
Applicant: UNITED TECHNOLOGIES CORPORATION
Inventor： Marc J. Muldoon
Abstract: A power extraction system for a gas turbine engine may comprise a high spool transmission, a low spool transmission, and an accessory gearbox. The accessory gearbox may comprise a starter-generator, a low spool starter-generator gear, a high spool gear, and a clutch configured to selectively engage and disengage the low spool starter-generator gear and the high spool gear. The low spool starter-generator gear may be configured to transfer torque between the starter-generator and the low spool transmission for accessory power generation. The high spool gear may be configured to transfer torque to the high spool transmission for engine starting. The clutch may be controlled by a variable transmission and may allow accessories to be driven by the low spool after starting.
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Patent Agency Ranking
公开(公告)号：US10240671B2
公开(公告)日：2019-03-26
申请号：US15962819
申请日：2018-04-25
Applicant: United Technologies Corporation
Inventor： Marc J. Muldoon
Abstract: A journal pin may comprise an internal bore formed along an axis of rotation of the journal pin, a recessed wall of the internal bore having a diameter greater than the diameter of the internal bore, the internal bore extending completely through the journal pin, and a collar coupled to the journal pin, wherein the collar comprises a second recessed wall; and a carrier press fit onto the collar. The journal pin may comprise an undercut radially outward from the internal bore and radially inward from an outer diameter of the journal pin.
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公开(公告)号：US10151240B2
公开(公告)日：2018-12-11
申请号：US15084970
申请日：2016-03-30
Applicant: United Technologies Corporation
Inventor： Marc J. Muldoon , Gregory E. Reinhardt
IPC: F02C7/28 , F02C7/06 , F01D11/02 , F01D25/16 , F01D25/28 , F16J15/40 , F02C7/20 , F01D11/04 , F01D25/18 , F01D25/20 , F02K3/06 , F02C6/08 , F01D11/00 , F02C3/10
Abstract: A mid-turbine frame buffer system for a gas turbine engine includes a mid-turbine frame that supports a shaft by a bearing. An air compartment and a bearing compartment are arranged radially inward of the mid-turbine frame. The bearing compartment is arranged within the air compartment and includes first and second contact seals arranged on either side of the bearing. The air compartment includes multiple air seals. A high pressure compressor is fluidly connected to the air compartment and is configured to provide high pressure air to the air compartment. A method of providing pressurized air to a buffer system includes sealing a bearing compartment with contact seals, surrounding the bearing compartment with an air compartment, and supplying high pressure air to the air compartment.
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公开(公告)号：US10012082B2
公开(公告)日：2018-07-03
申请号：US14937153
申请日：2015-11-10
Applicant: United Technologies Corporation
Inventor： Marc J. Muldoon
CPC classification number: F01D5/026 , F01D25/285 , F05D2220/323 , F05D2230/70 , F05D2250/281 , F05D2260/37
Abstract: A gas turbine engine includes first and second shaft members in an interference fit relationship with one another at an interface. The first and second shaft members respectively include first and second flanges that are arranged adjacent to the interface. The first and second flanges respectively include first and second threads that are configured to cooperate with a tool during disassembly of the first and second shaft members.
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公开(公告)号：US20160169042A1
公开(公告)日：2016-06-16
申请号：US14855854
申请日：2015-09-16
Applicant: United Technologies Corporation
Inventor： Nathan D. Korn , Marc J. Muldoon
CPC classification number: F01D25/20 , F01D5/005 , F01D15/12 , F01D25/16 , F01D25/18 , F01D25/34 , F02C7/06 , F02C7/14 , F02C7/185 , F02C7/224 , F05D2220/32 , F05D2230/60 , F05D2230/70 , F05D2230/72 , F05D2240/50 , F05D2260/98 , Y02T50/671 , Y02T50/675
Abstract: A method of maintaining a gas-turbine engine is provided. The method includes the steps of removing a conduit from the gas-turbine engine, installing a temporary oil filter in place of the conduit in the gas-turbine engine, and starting the gas-turbine engine with the temporary oil filter installed. A fan-drive gear system is also provided and comprises a journal bearing, a main oil pump fluidly coupled to the journal bearing, a main oil filter fluidly coupled between the journal bearing and the main oil pump, and an auxiliary oil pump fluidly coupled to the journal bearing. The auxiliary oil pump may be configured to supply oil to the journal bearing on startup. An auxiliary oil filter may also be installed between the auxiliary oil pump and the journal bearing.
Abstract translation: 提供了维持燃气涡轮发动机的方法。 该方法包括以下步骤：从燃气涡轮发动机中移除导管，安装临时机油过滤器代替燃气涡轮发动机中的导管，以及安装临时滤油机起动燃气涡轮发动机。 还提供了一种风扇驱动齿轮系统，其包括轴颈轴承，流体地联接到轴颈轴承的主油泵，流体联接在轴颈轴承和主油泵之间的主油过滤器，以及辅助油泵，其流体耦合到 轴颈轴承。 辅助油泵可以配置为在起动时向轴颈轴承供油。 辅助油过滤器也可以安装在辅助油泵和轴颈轴承之间。
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公开(公告)号：US20210207544A1
公开(公告)日：2021-07-08
申请号：US16732541
申请日：2020-01-02
Applicant: United Technologies Corporation
Inventor： Marc J. Muldoon
Abstract: A turbofan engine includes a high spool that includes a high pressure compressor coupled to a high pressure turbine through a high spool shaft, a low spool that includes a low pressure compressor coupled to a low pressure turbine through a low spool shaft, a first generator coupled to the high spool shaft, and a second generator coupled to the low spool shaft. The second generator generates electric power in a first engine operating condition and the first generator generates power in a second engine operating condition.
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