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    Bowed rotor prevention system
    1.
    发明授权
    Bowed rotor prevention system 有权

    公开(公告)号：US10801371B2

    公开(公告)日：2020-10-13

    申请号：US15582907

    申请日：2017-05-01

    Applicant: United Technologies Corporation

    Inventor： Jesse W. Clauson ,  Tyler J. Selstad

    IPC: F01D25/34 ,  F01D25/36 ,  F02C7/277 ,  F01D21/00 ,  F02C7/275

    Abstract: A bowed rotor prevention system for a gas turbine engine includes a bowed rotor prevention motor. A motor shaft of the bowed rotor prevention motor is operable to drive rotation of the gas turbine engine through an engine accessory gearbox. The motor shaft interfaces with an air turbine operable to rotate an output shaft mechanically linked to the engine accessory gearbox. The bowed rotor prevention system also includes a controller operable to engage the bowed rotor prevention motor and drive rotation of the gas turbine engine below an engine starting speed until a bowed rotor prevention threshold condition is met.

    THERMAL MANAGEMENT SYSTEM CONTROL AND HEAT EXCHANGER LIFE EXTENSION
    4.
    发明申请
    THERMAL MANAGEMENT SYSTEM CONTROL AND HEAT EXCHANGER LIFE EXTENSION 审中-公开

    公开(公告)号：US20170322571A1

    公开(公告)日：2017-11-09

    申请号：US15145508

    申请日：2016-05-03

    Applicant: United Technologies Corporation

    Inventor： Timothy J. Crowley ,  Tyler J. Selstad ,  Ding Xibei

    IPC: G05D23/02 ,  G05B13/04 ,  F02C9/16

    CPC classification number: G05D23/023 ,  F02C9/16 ,  G05B13/048 ,  G06Q10/06 ,  G06Q50/06

    Abstract: According to an aspect, a method includes generating, by a computer processor, thermo-fluid parameter estimates of a thermal management system (TMS) of an engine based on sensed parameters and monitoring for TMS component failures based on the thermo-fluid parameter estimates and the sensed parameters. Thermo-mechanical parameter estimates are generated based on selected thermo-fluid parameters. Life usage estimates and life usage rate estimates are generated based on the selected thermo-fluid parameters and the thermo-mechanical parameter estimates. Life usage rate targets are generated based on external commands and the life usage estimates. Limits and goals are modified based on the life usage rate estimates, failure flags, and the life usage rate targets. A model predictive control is applied to command one or more TMS control components based on thermo-mechanical model parameters, the failure flags, and the limits and goals.

    APPARATUS AND METHOD FOR CONTROLLING AND MONITORING AN ELECTRO-HYDRAULIC SERVOVALVE
    6.
    发明申请
    APPARATUS AND METHOD FOR CONTROLLING AND MONITORING AN ELECTRO-HYDRAULIC SERVOVALVE 审中-公开

    公开(公告)号：US20200224594A1

    公开(公告)日：2020-07-16

    申请号：US16837684

    申请日：2020-04-01

    Applicant: United Technologies Corporation

    Inventor： Tyler J. Selstad

    IPC: F02C9/26 ,  F16K37/00 ,  F02C9/28 ,  G01M15/14 ,  F02C7/232

    Abstract: A method for actively calculating a capability of an electronically controlled valve is provided. The method including the steps of: a) operating the electronically controlled valve in accordance with a task; b) testing the electronically controlled valve in order to determine a range of movement of the electronically controlled valve in accordance with an initial gain, wherein the testing of the electronically controlled valve occurs after the valve has been operated in accordance with the task; c) determining a new gain required for providing a predetermined range of movement of the electronically controlled valve; and d) repeating steps a-c at least once, wherein the new gain is used to operate the valve in accordance with the task.

    LEAK DETECTION, ISOLATION AND ACCOMMODATION ASSEMBLY FOR GAS TURBINE ENGINES
    7.
    发明申请
    LEAK DETECTION, ISOLATION AND ACCOMMODATION ASSEMBLY FOR GAS TURBINE ENGINES 审中-公开

    公开(公告)号：US20170321608A1

    公开(公告)日：2017-11-09

    申请号：US15147173

    申请日：2016-05-05

    Applicant: United Technologies Corporation

    Inventor： Timothy J. Crowley ,  Tyler J. Selstad ,  Sorin Bengea ,  Robert H. Luppold

    IPC: F02C7/22 ,  F02C7/232 ,  F02C7/236

    CPC classification number: F02C7/222 ,  F02C7/22 ,  F02C7/232 ,  F02C7/236 ,  F02C9/00 ,  F02C9/28 ,  F05D2220/32 ,  F05D2260/80

    Abstract: A fuel system for a gas turbine engine includes, among other things, a plurality of components defining a plurality of localized nodes at distinct locations relative to a fuel flow path, each of the plurality of localized nodes characterized by a distinct set of failure parameters. One or more fuel sensors are configured to measure at least one fuel condition relating to flow through the fuel flow path. A fuel observation assembly is coupled to one or more engine sensors configured to measure at least one engine condition. The fuel observation assembly comprises an estimation module operable to calculate an expected condition of each of the plurality of localized nodes based upon the set of failure parameters, an observation module operable to calculate an observed condition of each of the plurality of localized nodes, the observed condition based on present values of the at least one fuel condition and the at least one engine condition, and a comparison module operable to determine an abnormality corresponding to a first one of the plurality of localized nodes based upon a comparison of the expected condition and the observed condition for each of the plurality of localized nodes.

    High pressure turbine speed calculation from fuel system hydraulic pressures
    10.
    发明授权
    High pressure turbine speed calculation from fuel system hydraulic pressures 有权
    从燃油系统液压压力计算高压汽轮机转速

    公开(公告)号：US09151229B2

    公开(公告)日：2015-10-06

    申请号：US13718066

    申请日：2012-12-18

    Applicant: United Technologies Corporation

    Inventor： Tyler J. Selstad

    IPC: F02C7/22 ,  F02C9/26

    CPC classification number: F02C9/26 ,  F01D21/003 ,  F05D2260/80 ,  F05D2270/3015

    Abstract: The speed of a high-pressure turbine of a gas turbine engine may be determined using known centrifugal pump affinity relationships for a fuel pressure apparatus, fuel pressure apparatus input and output pressures, and gear ratios for a mechanical linkage between the high-pressure turbine and the fuel pressure apparatus. The technique avoids wear-related variations in gas pressure based measurements and also applies to fuel pressure apparatus using both single pump and multiple pump configurations.

    Abstract translation: 燃气涡轮发动机的高压涡轮机的速度可以使用用于燃料压力装置，燃料压力装置输入和输出压力以及高压涡轮机和 燃料压力装置。 该技术避免了基于气体压力的测量的磨损相关变化，并且也适用于使用单泵和多泵配置的燃油压力装置。

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