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公开(公告)号：US08651812B2
公开(公告)日：2014-02-18
申请号：US12588084
申请日：2009-10-02
CPC分类号： F02K3/025 , B64C11/385 , B64C11/40 , B64C11/48 , B64D2027/026 , F05D2260/76
摘要： A engine such as a gas turbine engine has a bladed rotor 24 having variable pitch blades 8. In normal operation, the pitch angle of the blades 8 is controlled by a primary pitch control system. A back-up system is provided for controlling the blades 8, for example to displace them to a feathered condition, in the event of failure of the primary pitch control system. The back-up system comprises a pump 32 mounted on the rotor 24, and driven by relative rotation between the rotor 24 and a contra-rotating rotor 23. In response to a failure signal on a conduit 48, the pump delivers hydraulic fluid under pressure to a secondary actuator 30, which acts on the blade 8.
摘要翻译： 诸如燃气涡轮发动机的发动机具有具有可变桨距叶片8的叶片转子24.在正常操作中，叶片8的俯仰角由主桨距控制系统控制。 在主变桨控制系统发生故障的情况下，提供一种备用系统来控制叶片8，例如将叶片8置于羽状状态。 备用系统包括安装在转子24上的泵32，并通过转子24和反向旋转转子23之间的相对转动来驱动。响应于导管48上的故障信号，泵在压力下输送液压流体 到作用在叶片8上的次级致动器30。
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公开(公告)号：US20100129214A1
公开(公告)日：2010-05-27
申请号：US12588084
申请日：2009-10-02
CPC分类号： F02K3/025 , B64C11/385 , B64C11/40 , B64C11/48 , B64D2027/026 , F05D2260/76
摘要： A engine such as a gas turbine engine has a bladed rotor 24 having variable pitch blades 8. In normal operation, the pitch angle of the blades 8 is controlled by a primary pitch control system. A back-up system is provided for controlling the blades 8, for example to displace them to a feathered condition, in the event of failure of the primary pitch control system. The back-up system comprises a pump 32 mounted on the rotor 24, and driven by relative rotation between the rotor 24 and a contra-rotating rotor 23. In response to a failure signal on a conduit 48, the pump delivers hydraulic fluid under pressure to a secondary actuator 30, which acts on the blade 8.
摘要翻译： 诸如燃气涡轮发动机的发动机具有具有可变桨距叶片8的叶片转子24.在正常操作中，叶片8的俯仰角由主桨距控制系统控制。 在主变桨控制系统发生故障的情况下，提供一种备用系统来控制叶片8，例如将叶片8置于羽状状态。 备用系统包括安装在转子24上的泵32，并通过转子24和反向旋转转子23之间的相对转动来驱动。响应于导管48上的故障信号，泵在压力下输送液压流体 到作用在叶片8上的次级致动器30。
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公开(公告)号：US08794920B2
公开(公告)日：2014-08-05
申请号：US13034312
申请日：2011-02-24
申请人： Marko Bacic , Jonathan E. Holt
发明人： Marko Bacic , Jonathan E. Holt
CPC分类号： B64C11/306 , B64C11/44 , B64D2027/005 , Y02T50/66
摘要： A method and arrangement of controlling blade pitch angle of a set of rotor blades. The method comprises providing a target blade pitch angle to a controller mounted on the rotor; measuring the speed of rotation of the rotor using a rate gyro mounted on the rotor; calculating the blade pitch angle required to match the target blade pitch angle by summing the target blade pitch angle and the measured rotational speed; and actuating the blades to the calculated blade pitch angle.
摘要翻译： 控制一组转子叶片叶片桨距角的方法和装置。 该方法包括向安装在转子上的控制器提供目标叶片桨距角; 使用安装在转子上的速率陀螺仪来测量转子的转速; 通过将目标叶片桨距角和测量的旋转速度相加来计算与目标叶片俯仰角匹配所需的叶片桨距角; 并且将叶片致动到所计算的叶片俯仰角。
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公开(公告)号：US20080238698A1
公开(公告)日：2008-10-02
申请号：US11896706
申请日：2007-09-05
IPC分类号： G08B21/00
CPC分类号： F01D17/20 , F02C9/18 , Y02T50/671 , Y10T137/8175 , Y10T137/8326
摘要： It is known that determination of bleed valve activation in a gas turbine engine can be difficult unless the engine is maintained at a steady idle state for comparison between that state and effects of activation of the bleed valve. Furthermore, specific test activation of bleed valves increases wear and tear on those valves. By sensing a flow pressure response signal and then through appropriate averaging and processing through a non-linear filter, it is possible to identify bleed valve activation by a target signal response exceeding a threshold indicative of such bleed valve activation.
摘要翻译： 众所周知，除非发动机保持在稳定的怠速状态，否则在燃气涡轮发动机中确定泄放阀的活化可能是困难的，以便在该状态和排放阀的启动效果之间进行比较。 此外，泄放阀的特定测试激活会增加这些阀门的磨损。 通过感测流量压力响应信号，然后通过非线性滤波器的适当平均和处理，可以通过超过表示这种泄放阀激活的阈值的目标信号响应来识别泄放阀激活。
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公开(公告)号：US09423233B2
公开(公告)日：2016-08-23
申请号：US13703909
申请日：2011-06-14
CPC分类号： G01B7/14 , B64C11/30 , B64C11/306 , B64D2027/005 , F04D27/0246 , F04D29/323 , F04D29/36 , F04D29/362 , G01B7/003 , G01D5/2216 , G01P3/488 , Y02T50/66
摘要： An apparatus, for example for a pitch change mechanism, includes a cylinder having a magnetic portion defining an annular array of features extending parallel to the longitudinal axis of the cylinder, the cylinder rotating in use and able to translate longitudinally. There is a sensing arrangement including a stationary magnetised core and two coils connected in series and wound around the core. In use, the cylinder rotates and current is induced in the coils. Monitoring equipment is arranged to calculate rotational speed of the cylinder from the frequency of the current and to calculate longitudinal position from the relative amplitude of the current in each coil. Also a method.
摘要翻译： 例如用于间距改变机构的装置包括具有磁性部分的圆柱体，该磁性部分限定平行于圆柱体的纵向轴线延伸的特征的环形阵列，该圆柱体在使用中旋转并能够纵向平移。 存在感测装置，其包括固定磁化芯和串联连接并缠绕在芯上的两个线圈。 在使用中，气缸旋转，线圈中感应出电流。 监视设备被布置成从电流的频率计算汽缸的转速，并根据每个线圈中的电流的相对幅度计算纵向位置。 也是一种方法。
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公开(公告)号：US20130094966A1
公开(公告)日：2013-04-18
申请号：US13703909
申请日：2011-06-14
CPC分类号： G01B7/14 , B64C11/30 , B64C11/306 , B64D2027/005 , F04D27/0246 , F04D29/323 , F04D29/36 , F04D29/362 , G01B7/003 , G01D5/2216 , G01P3/488 , Y02T50/66
摘要： An apparatus, for example for a pitch change mechanism, includes a cylinder having a magnetic portion defining an annular array of features extending parallel to the longitudinal axis of the cylinder, the cylinder rotating in use and able to translate longitudinally. There is a sensing arrangement including a stationary magnetised core and two coils connected in series and wound around the core. In use, the cylinder rotates and current is induced in the coils. Monitoring equipment is arranged to calculate rotational speed of the cylinder from the frequency of the current and to calculate longitudinal position from the relative amplitude of the current in each coil. Also a method.
摘要翻译： 例如用于间距改变机构的装置包括具有磁性部分的圆柱体，该磁性部分限定平行于圆柱体的纵向轴线延伸的特征的环形阵列，该圆柱体在使用中旋转并能够纵向平移。 存在感测装置，其包括固定磁化芯和串联连接并缠绕在芯上的两个线圈。 在使用中，气缸旋转，线圈中感应出电流。 监视设备被布置成从电流的频率计算汽缸的转速，并根据每个线圈中的电流的相对幅度计算纵向位置。 也是一种方法。
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