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公开(公告)号：US20240337222A1
公开(公告)日：2024-10-10
申请号：US18750320
申请日：2024-06-21
IPC分类号： F02C9/36
CPC分类号： F02C9/36
摘要： A system and method for operating a gas turbine engine are provided. The system and method remove fuel from a fuel manifold during a low-power mode of operation of the gas turbine engine. The method includes supplying fuel to a combustor of the gas turbine engine via a first manifold and a second manifold during a first mode of operation; stopping fuel supply to the combustor via the second manifold and continuing to supply fuel to the combustor via the first manifold during a second mode of operation; and, after stopping fuel supply to the combustor via the second manifold, purging fuel from the second manifold using a pressure inside the combustor to drive the fuel in the second manifold away from the combustor.
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公开(公告)号：US10465908B2
公开(公告)日：2019-11-05
申请号：US15430085
申请日：2017-02-10
申请人： ROLLS-ROYCE plc
发明人： Andrew Stevenson , Graham Thompson
摘要： A combustion staging system includes a splitting unit which receives a metered fuel flow and controllably splits the received fuel flow into pilot and mains flows. Pilot and mains fuel manifolds distribute fuel from the splitting unit to the pilot and mains stages. The splitting unit selects and deselects pilot-only operation. Both pilot and mains manifolds are selectable for pilot and mains operation. A cooling flow recirculation line has a delivery section arranged to provide a cooling flow of fuel to the mains manifold when it is deselected during pilot-only operation. Cooling flow enters the delivery section from a high pressure fuel zone of the engine and exits the return section to a low pressure fuel zone of the engine. A controller adjusts the splitting unit during pilot-only operation to partially select the mains manifold thereby increasing the pressure in the mains manifold to meet a target fuel pressure therein.
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公开(公告)号：US10267237B2
公开(公告)日：2019-04-23
申请号：US15067921
申请日：2016-03-11
摘要： A fuel system for an aircraft is provided having an improved fluid circuit and method of operation. Un-burnt fuel is directed via a return loop towards a fuel tank reservoir. A turbine is located in the return loop and upstream from the fuel tank. The pressurized un-burnt fuel energizes the turbine and the fuel passes to the fuel tank. The turbine is harnessed to a generator for providing a power.
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公开(公告)号：US09261025B2
公开(公告)日：2016-02-16
申请号：US14278095
申请日：2014-05-15
发明人： Kevin Allan Dooley
CPC分类号： F02C7/22 , F01D21/06 , F02C7/228 , F02C7/232 , F02C9/34 , F02C9/36 , F05D2260/602 , F05D2270/3015
摘要： A method for purging fuel from a fuel system of a gas turbine engine on shutdown of the engine comprises, in one aspect, terminating a fuel supply to the fuel system and using the residual compressed air to create a reversed pressure differential in the fuel system relative to a forward pressure differential of the fuel system used to maintain fuel supply for engine operation, and under the reversed pressure differential substantially purging the fuel remaining in the system therefrom to a fuel source.
摘要翻译： 在发动机关闭时，用于从燃气涡轮发动机的燃料系统中清除燃料的方法包括在一个方面终止燃料供应到燃料系统并且使用剩余的压缩空气在燃料系统相对中产生反向的压力差 到用于维持用于发动机运转的燃料供应的燃料系统的正向压力差，以及在逆向压差下将基本上清除系统中剩余的燃料从燃料供给到燃料源。
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公开(公告)号：US08813470B2
公开(公告)日：2014-08-26
申请号：US13524102
申请日：2012-06-15
申请人： Hermann Engesser
发明人： Hermann Engesser
CPC分类号： F02C7/232 , F02C9/36 , F05D2260/602
摘要： In a method for operating a fuel supply for a heat engine, in a first step the block valve (4) and the control valve (5) are closed, with the vent valve (7) closed. In a second step, the vent valve (7) is opened so that fuel volume (V1) which is present in the fuel line section (1′) and vent line (6′) can drain. In a third step, the vent valve (7) is closed. In a fourth step, the control valve (5) is opened. In a fifth step, the fuel volume (V1) is replenished by a pressure-driven backflow of fuel from the combustion process (3). In a sixth step, the control valve (5) is closed and then the vent valve (7) is opened, for draining of the replenished fuel volume (V1) which has been formed there on account of the action taken according to the fifth step.
摘要翻译： 在用于操作热机的燃料供给的方法中，在第一步骤中，通气阀（7）关闭时，截止阀（4）和控制阀（5）关闭。 在第二步骤中，排气阀（7）打开，使得存在于燃料管路部分（1'）和排放管线（6'）中的燃料量（V1）能够排出。 在第三步骤中，排气阀（7）关闭。 在第四步骤中，打开控制阀（5）。 在第五步骤中，燃料量（V1）由来自燃烧过程（3）的燃料的压力驱动回流补充。 在第六步骤中，关闭控制阀（5），然后打开排气阀（7），用于排出由于根据第五步骤所采取的动作而形成在那里的补充燃料量（V1） 。
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公开(公告)号：US4776560A
公开(公告)日：1988-10-11
申请号：US920610
申请日：1986-10-20
摘要： A fuel flow control valve is adapted to control the flow of fuel in a spill line to control the amount of fuel usable in a two speed gas turbine. The valve includes fluid pressure operated valve means controlled by two variable volume fluid pressure chambers to provide appropriate fuel flow for `run` and `idle` conditions, and positioning means to automatically position the fluid pressure operated valve means when the control valve is at rest to provide a flow of fuel appropriate for `start-up` of the gas turbine that is greater than the flow required in the `idle` condition but less than that required in the `run` condition. Operating fluid pressures connected to the chambers may comprise either gaseous fluid pressures tapped from a stage of the compressor of the gas turbine or a combination of said gaseous pressure source and a liquid fluid pressure source preferably comprising a fuel pressure supply tapped from the fuel supply line to the gas turbine.
摘要翻译： 燃料流量控制阀适于控制溢流管线中的燃料流量，以控制可用于两速燃气轮机的燃料量。 阀包括由两个可变体积流体压力室控制的流体压力操作阀装置，以便为“运行”和“空转”条件提供适当的燃料流量，以及定位装置，用于在控制阀静止时自动定位流体压力操作阀装置 以提供适合于燃气轮机的“起动”的燃料流量大于“空转”状态所需的流量，但小于“运行”状态下所需的流量。 连接到室的工作流体压力可以包括从燃气轮机的压缩机的级或从所述气体压力源和液体流体压力源的组合中抽出的气体流体压力，优选地包括从燃料供应管线 到燃气轮机。
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公开(公告)号：US4747263A
公开(公告)日：1988-05-31
申请号：US922932
申请日：1986-10-24
CPC分类号： F02C9/26
摘要： An electrical control system for a fuel circuit including a low pressure pump, a high pressure pump, a throttle valve and a pressurizing valve connected in series between a fuel reservoir and the fuel injectors of a gas turbine engine includes a first device including a first solenoid controlled valve capable of interruption of the connection between the outlet of the throttle valve and an inlet to a pressure drop detector which is normally connected across the throttle valve. The output of the pressure drop detector controls a control valve which can by-pass high pressure fuel output from the high pressure pump back to the pump inlet. The first device includes two, identical, parallel control channels each provided with its own independent power supply, a control first switch with two positions each leading to a respective processing circuit which has its output connected to one terminal of a respective solenoid winding of the bistable first solenoid controlled valve. In the "start" position of the first switch each channel independently causes operation of its respective first solenoid controlled valve to make the fuel circuit between the output of the throttle valve and the input of the pressure drop detector allowing fuel to be supplied to the start-up injectors and then the main injectors of the jet engine. In the "stop" position the signal is processed to operate the bistable valves to "break" the fuel circuit between the output of the supply regulator and the input to the pressure detector. This causes the by-pass valve to by-pass the fuel from the outlet to the inlet of the high pressure pump, cutting off the fuel supply to the injectors and stopping the engine. A second device acts directly in the by-pass valve to supply the fuel reservoir pressure instead of the outlet from the pressure drop detector to the control input of the by-pass valve so as to cause the by-pass valve to open so that fuel is recirculated from the high pressure pump to its input. This second device acts as a safety cut-off device in the event of failure of the first device.
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公开(公告)号：US3878676A
公开(公告)日：1975-04-22
申请号：US39776373
申请日：1973-09-17
申请人： GEN MOTORS CORP
发明人： HITZELBERGER ALAN L
CPC分类号： F02C9/36
摘要： A fuel supply system for a gas turbine engine such as a gascoupled vehicle driving engine includes a pump driven by the engine, a resistance valve between the pump outlet and the engine combustion chamber fuel nozzle, and a by-pass from the pump outlet to the pump inlet flowing through a by-pass valve and a resistance valve in series. The fuel nozzle provides a fuel metering orifice. The by-pass valve is biased to open by fuel pump discharge pressure and is biased to close by a pressure derived from the engine compressor discharge pressure. Compressor discharge pressure is fed through an orifice into a chamber to bias a diaphragm which operates to close the valve. Compensation for ambient temperature and pressure are provided by suitably controlled bleeds from this chamber. Limitation of metered fuel pressure for acceleration is accomplished by the compressor discharge pressure as so modified, and steady state fuel pressure is limited by a relief valve from the chamber the pressure setting of which is varied by manual control. The resistance valve in the engine fuel line establishes a suitable bias tending to open the by-pass valve to accommodate its characteristics to those of the engine, and a resistance valve in the by-pass line which has a higher setting enforces flow of fuel to the engine during starting.
摘要翻译： 用于诸如气体联接车辆驱动发动机的燃气涡轮发动机的燃料供应系统包括由发动机驱动的泵，泵出口和发动机燃烧室燃料喷嘴之间的阻力阀，以及来自泵出口的旁路 到通过旁路阀和电阻阀串联的泵入口。 燃料喷嘴提供燃料计量孔。 旁通阀被燃料泵排出压力偏压打开，并通过来自发动机压缩机排气压力的压力偏压关闭。 压缩机排出压力通过孔进料到室中以偏压操作以关闭阀的隔膜。 环境温度和压力的补偿由适当控制的来自该腔室的出血提供。 加压的计量燃油压力的限制是通过如此修改的压缩机排气压力来实现的，并且稳态燃料压力受到其压力设定由手动控制而改变的腔室的安全阀的限制。 发动机燃油管路中的阻力阀建立了适合于打开旁通阀以适应其发动机特性的偏压，并且具有较高设定值的旁通管线中的阻力阀将燃料流动 发动机起动时。
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公开(公告)号：US3777480A
公开(公告)日：1973-12-11
申请号：US3777480D
申请日：1972-03-20
申请人： GEN MOTORS CORP
发明人： STOLTMAN D
摘要： A fuel control disclosed in connection with a gas-coupled gas tubine engine for shaft power output purposes. The fuel control is supplied by a transfer pump and a pressure pump in series and delivers fuel to a nozzle in the engine combustion apparatus. The control receives an input of gas generator speed and an input of compressor discharge pressure. It receives electrical inputs serving to limit turbine inlet temperature and power turbine speed, and may include an electrical On-Off input. Flow of fuel to the engine is directly controlled by a slave valve which responds to pressure of fuel delivered to the nozzle and to a control pressure derived from the pressure pump outlet. The control pressure is developed between an upstream orifice and parallel downstream valves which include a solenoid valve operated to limit turbine inlet temperature and power turbine speed, a valve responsive to compressor discharge pressure, and a governor valve responsive to gas generator turbine speed. The OnOff control bleeds the nozzle to the fuel tank when the engine is turned off. During engine deceleration, the slave valve stops fuel flow without emptying the nozzle and the fuel line to it. The metering head across the slave valve is controlled by a differential pressure responsive by-pass valve which discharges excess fuel to the pressure pump inlet. The by-pass valve may define a passage for fuel to maintain a pilot flame during deceleration.
摘要翻译： 关于用于轴功率输出目的的气体联接气体发动机公开的燃料控制。 燃料控制由输送泵和压力泵串联提供，并将燃料输送到发动机燃烧装置中的喷嘴。 控制器接收气体发生器速度的输入和压缩机排放压力的输入。 它接收用于限制涡轮机入口温度和功率涡轮机速度的电输入，并且可以包括电开关输入。 燃料流向发动机的流量直接由从动阀控制，从动阀响应输送到喷嘴的燃料的压力和来自压力泵出口的控制压力。 控制压力在上游孔口和并行下游阀门之间形成，其包括操作以限制涡轮机入口温度和功率涡轮机速度的电磁阀，响应于压缩机排气压力的阀门以及响应于气体发生器涡轮机速度的调速阀。 当发动机关闭时，On-Off控制器将喷嘴喷射到燃油箱。 在发动机减速期间，从动阀停止燃油流动，而不会将喷嘴和燃油管路排空。 从阀的计量头由压差响应的旁通阀控制，该压力阀将多余的燃料排放到压力泵入口。 旁路阀可以限定用于燃料的通道，以在减速期间保持导向火焰。
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公开(公告)号：US11530653B2
公开(公告)日：2022-12-20
申请号：US17528670
申请日：2021-11-17
摘要： A method for reducing an engine core speed is disclosed, which includes determining a condition of an engine during operation of the engine, and controlling an engine turbine clearance based on the condition of the engine so as to influence the engine core speed. An engine system comprising an engine core speed reducing system is also disclosed.
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