-
公开(公告)号：US4608820A
公开(公告)日：1986-09-02
申请号：US730000
申请日：1985-05-03
摘要： A fuel control for a gas turbine engine has an actuator (24) for a fuel metering valve (22) which includes two stepper motors (46 and 48) which selectively drive a differential mechanism operatively connected to the valve. The differential mechanism includes two identical gear assemblies (60, 64) which are mounted for rotation upon a shaft (26) connected to the valve. The gear assemblies include worm gears (58, 62) in engagement with worms (54, 56) driven by the stepper motors and bevel gears (68, 70). A spider bevel gear (66), carried by the shaft, is in meshing engagement with the bevel gears of the gear assemblies such that rotation of one of the gear assemblies with the other at rest causes a circumferential movement of the spider bevel gear which rotates the shaft and positions the valve. Two identical electronic control units (A, B), which each sense selected engine parameters are respectively connected to the stepper motors for controlling their operation. Only one of the electronic control units functions to control its stepper motor during normal operation while the positions worm and gear assembly associated with the other stepper motor remain frozen without any backdriving. Changeover to the other electronic control unit because of a malfunction or other reason may be effected by switching logic or operation of a selector switch (100).
摘要翻译： 用于燃气涡轮发动机的燃料控制器具有用于燃料计量阀（22）的致动器（24），其包括两个步进电动机（46和48），其选择性地驱动可操作地连接到阀的差动机构。 差速机构包括两个相同的齿轮组件（60,64），其被安装成在连接到阀的轴（26）上旋转。 齿轮组件包括与由步进电机和锥齿轮（68,70）驱动的蜗杆（54,56）接合的蜗轮（58,62）。 由该轴承载的一个齿锥齿轮（66）与齿轮组件的锥齿轮啮合啮合，使得一个齿轮组件与其他齿轮组件之间的转动停止，导致该旋转的齿轮锥齿轮的周向运动 轴和定位阀。 两个相同的电子控制单元（A，B）分别连接到步进电机以控制它们的操作。 只有一个电子控制单元用于在正常操作期间控制其步进电机，而与其他步进电机相关联的位置蜗杆和齿轮组件在没有任何反向驱动的情况下保持冷冻。 由于故障或其它原因导致切换到另一个电子控制单元可以通过切换逻辑或切换开关（100）的操作来实现。
-
公开(公告)号：US4454713A
公开(公告)日：1984-06-19
申请号：US270484
申请日：1981-06-04
申请人： Gene A. Meyer , Robert E. Peck
发明人： Gene A. Meyer , Robert E. Peck
IPC分类号： F02C9/28
CPC分类号： F02C9/28
摘要： A fuel metering system for a gas turbine engine with a low pressure drop fuel vaporizing system includes an engine driven centrifugal pump (10) supplied with fuel at a given absolute pressure (Pi) from a tank. The pump discharges fuel to a rapidly pulsed, solenoid operated ball valve (20) which functions as a metering valve in controlling flow to the engine. The solenoid (38) of the metering valve receives periodic voltage pulses of appropriate width from an electronic control which senses selected engine parameters and computes the required fuel flow and the pressure differential (Pr-P.sub.D) across the metering valve. Since the pressure differential across the metering valve increases with engine speed, favorable flow turndown ratios may be achieved without operating the metering valve at high or low values of duty cycle.
摘要翻译： 一种用于具有低压降燃料蒸发系统的燃气涡轮发动机的燃料计量系统，包括从罐提供给定绝对压力（Pi）的燃料的发动机驱动的离心泵（10）。 泵将燃料排放到快速脉冲的电磁操作的球阀（20）上，该球阀用作控制流向发动机的计量阀。 计量阀的螺线管（38）从电子控制器接收适当宽度的周期性电压脉冲，该电子控制器感测所选择的发动机参数，并计算跨越计量阀的所需燃料流量和压力差（Pr-PD）。 由于计量阀上的压力差随着发动机转速的增加而增加，因此可以在不使用计量阀处于高或低占空比的情况下实现有利的流量调节比。
-
公开(公告)号：US4578945A
公开(公告)日：1986-04-01
申请号：US550610
申请日：1983-11-10
申请人： Robert E. Peck , Albert H. White
发明人： Robert E. Peck , Albert H. White
摘要： A fuel control for a gas turbine engine has a positive displacement pump (28) for supplying fuel to the engine. Fuel flow from the pump is metered by a metering valve (30) which has a constant pressure head held across it by a metering head regulator valve (48) adapted to bypass flow around the pump in a conduit (50). An overspeed valve and solenoid assembly (42) is positioned in the control downstream of the metering valve for shutting off fuel flow to the engine in the event of an overspeed of a turbine of the engine. The metering head regulator valve is referenced to a pressure downstream of the overspeed valve and solenoid assembly by a pressure sense line (68). The solenoid (96) is controlled by a dual channel overspeed valve control circuit (102) having proportional plus derivative gains (108, 110). When the overspeed valve (76) of the assembly is operated, the pump is not deadheaded because the metering head regulator valve is referenced to a lower pressure downstream of the overspeed valve. By not deadheading the pump, faster fuel shutoff can be achieved and leakage across the overspeed valve minimized.
摘要翻译： 用于燃气涡轮发动机的燃料控制器具有用于向发动机供应燃料的容积式泵（28）。 来自泵的燃料流量由计量阀（30）计量，计量阀（30）具有通过计量头调节阀（48）保持在恒定压力头上的恒定压头，该计量阀调节阀（48）适于在导管（50）内围绕泵绕流。 超量阀和螺线管组件（42）定位在计量阀下游的控制器中，用于在发动机的涡轮机超速的情况下关闭向发动机的燃料流。 计量头调节阀以超压阀和螺线管组件的下游压力通过压力感测线（68）参考。 螺线管（96）由具有比例正导数增益（108,110）的双通道超速阀控制电路（102）控制。 当组件的超速阀（76）被操作时，泵不是无头，因为计量头调节阀参考超速阀下游的较低压力。 通过不会使泵不起作用，可以实现更快的燃料关闭，并且超过阀门的泄漏最小化。
-
公开(公告)号：US4393651A
公开(公告)日：1983-07-19
申请号：US183059
申请日：1980-09-02
摘要： A fuel control for a gas turbine engine has a positive displacement pump (10) which directs fuel to a constant flow regulator (14) which generates a constant or fixed rate flow of fuel. A flow diverter (16) includes a dividing device which divides the constant flow of fuel between a discharge conduit (18) connected to the burner nozzles of the engine and a bypass conduit (20) connected to the inlet side of the pump. A computer (22) which is adapted to sense various engine parameters; and calculate fuel flow controls the flow dividing device in order to apportion the flow so that the calculated fuel flow is delivered to the engine.
摘要翻译： 用于燃气涡轮发动机的燃料控制器具有容积泵（10），其将燃料引导到恒定的流量调节器（14），其产生恒定或固定的燃料流量。 流量分配器（16）包括一个分流装置，该分配装置将连接到发动机的燃烧器喷嘴的排放管道（18）与连接到泵的入口侧的旁路管道（20）之间的恒定的燃料流分开。 一种适于感测各种发动机参数的计算机（22） 并且计算燃料流量控制分流装置，以便分配流量，使得计算的燃料流量被输送到发动机。
-
公开(公告)号：US4793133A
公开(公告)日：1988-12-27
申请号：US546567
申请日：1983-10-28
申请人： Albert H. White , Robert E. Peck
发明人： Albert H. White , Robert E. Peck
CPC分类号： F02C9/46 , F05D2200/13
摘要： A manual backup system (10) for a fuel control incorporating a metering valve (108) controlled by an electronic computer has a power piston (34) and a loading piston (60) in confronting relationship adapted to engage each other upon power being withdrawn from a solenoid operated valve (72). The loading piston acts to maintain an arm (28) in engagement with the power piston so that it follows the power piston's movements as controlled by a servo valve (48), incorporating a fuel flow to compressor discharge pressure schedule (54), operated by a PLA lever (74). The position of the arm represents a requested fuel flow to discharge pressure ratio. The arm is mechanically connected to the metering valve through a multiplier linkage (96) which is also connected to a compressor discharge pressure transducer (98) so that the metering valve is positioned in accordance with the requested fuel flow to discharge pressure ratio as multiplied by the sensed compressor discharge pressure. Fuel flow is metered on the basis of an adjustable manual fuel flow to compressor discharge pressure schedule with the PLA lever operating in its normal quadrant. The PLA lever is not susceptible to being back driven during changeover or manual operation.
摘要翻译： 用于包括由电子计算机控制的计量阀（108）的燃料控制器的手动备用系统（10）具有动力活塞（34）和负载活塞（60），所述动力活塞（34）和负载活塞（60）适于在从 电磁阀（72）。 装载活塞用于保持臂（28）与动力活塞接合，使得其遵循由伺服阀（48）控制的动力活塞的运动，其包括燃料流到压缩机排放压力调度（54），由 PLA杆（74）。 臂的位置表示要求的燃料流量对排出压力比。 臂通过乘法器连杆机构连接到计量阀，该乘法器连杆还连接到压缩机排放压力传感器（98），使得计量阀根据要求的燃料流量排出压力比乘以 感测的压缩机排气压力。 基于可调节的手动燃油流量到压缩机排放压力计划，在PLA杆操作在其正常象限中的情况下，计量燃油流量。 PLA转向杆或手动操作时不易受背部驱动。
-
公开(公告)号：US4977111A
公开(公告)日：1990-12-11
申请号：US389542
申请日：1989-08-04
CPC分类号： F23D14/16 , C04B28/06 , C04B30/02 , C04B35/803 , F23D2203/106 , F23D2213/00
摘要： Means and methods for enhancing the output of radiant energy from a porous radiant burner by minimizing the scattering and increasing the adsorption, and thus emission of such energy by the use of randomly dispersed ceramic fibers of sub-micron diameter in the fabrication of ceramic fiber matrix burners and for use therein.
摘要翻译： 通过最小化散射和增加吸附来增强多孔辐射燃烧器的辐射能输出的方法和方法，从而通过在制造陶瓷纤维基质中使用亚微米直径的随机分散的陶瓷纤维发射这种能量 燃烧器和用于其中。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.019 秒)
