公开(公告)号：US06767178B2

公开(公告)日：2004-07-27

申请号：US10335028

申请日：2002-12-31

申请人： Naum Staroselsky ,  Mykhailo Volynskyi ,  Dimitry Drob

发明人： Naum Staroselsky ,  Mykhailo Volynskyi ,  Dimitry Drob

IPC分类号： F01D1712

CPC分类号： G05B13/024 ,  F01D17/20 ,  F01D17/24

摘要： Steam turbine speed-control systems often incorporate pilot valves for controlling the position of hydraulic actuators for steam valves. Operational efficiency of these pilot valves can suffer from imperfections due to manufacturing defects, wear, contaminated oil, and the like, thereby impairing the control system's overall performance. This disclosure relates to a method for improving performance accuracy by incorporating a control system (including additional controllers) dedicated to overcoming the deficiencies of pilot valves or other control system components. With such a system, the lack of adequate control response can be detected by calculating the first time-derivative of a variety of main controlled-parameters. Such parameters can be directly related to steam flow control, such as steam valve position, steam flow rate, and pressure within the steam turbine; or they may be related to the driven equipment: generator power output, flow rate through a compressor, and compressor discharge pressure.

摘要翻译： 蒸汽轮机速度控制系统通常包括用于控制蒸汽阀的液压致动器的位置的先导阀。 这些先导阀的操作效率由于制造缺陷，磨损，污染的油等而存在缺陷，从而损害了控制系统的整体性能。 本公开涉及通过结合专门用于克服先导阀或其他控制系统部件的缺陷的控制系统（包括附加控制器）来提高性能精度的方法。 通过这样的系统，可以通过计算各种主要受控参数的第一时间导数来检测缺乏足够的控制响应。 这样的参数可以直接关系到蒸汽流量控制，例如蒸汽阀位置，蒸汽流量和蒸汽轮机内的压力; 或者它们可能与被驱动设备有关：发电机功率输出，通过压缩机的流量和压缩机排气压力。

公开(公告)号：US6116258A

公开(公告)日：2000-09-12

申请号：US250518

申请日：1999-02-16

申请人： Vadim Shapiro ,  Dmitry Drob ,  Mykhailo Volynskyi ,  Boris Zilberman

发明人： Vadim Shapiro ,  Dmitry Drob ,  Mykhailo Volynskyi ,  Boris Zilberman

IPC分类号： F01D17/14 ,  F01D21/18 ,  F15B13/042 ,  F15B20/00 ,  F16K31/00

CPC分类号： F15B20/002 ,  F01D17/145 ,  F01D21/18 ,  F15B13/042 ,  F05D2220/72 ,  F05D2270/021 ,  F05D2270/301 ,  Y10T137/0318 ,  Y10T137/8663

摘要： Pilot valves used in electrohydraulic control systems are driven by either an electromagnetic electromechanical actuator or an electromotor electromechanical actuator. A drawback of electromagnetic actuation is that on brief interruptions of electrical power the actuator causes a trip response to the pilot valve, whereas a drawback of electromotor actuation is that on complete interruptions of electrical power the actuator cannot independently cause a trip response of the pilot valve on demand. The proposed modification, involving the pilot valve, provides a means to effect a trip response regardless of the electromechanical actuator type used, together with overcoming the drawback of electromotor actuation. To realize the trip response, an additional piston (connected to the electromotor actuator's stem) is positioned between the actuator stem and the pilot valve. A surface area of the additional piston and one surface area of the pilot valve are loaded by pressure from an oil trip line in the hydraulic system. The loaded surface area of the pilot valve causes a force in the direction opposite to that of a trip, while the force on the additional piston is in the direction required for a trip. When a trip is required, hydraulic pressure in the trip line is reduced causing (1) the force on the actuator stem to go to zero; and (2) the other force, intrinsically found on the pilot valve, to actuate the pilot valve into a trip condition. The decrease of trip line pressure is carried out by three solenoid drain valves (each equipped with two solenoid coils) manipulated by three electronic overspeed trip devices operated by a two-out-of-three voting scheme. Consequently, this invention not only negates the disadvantage of using electromotor actuators, but it also provides overspeed protection and an under-load test of various control system elements.

摘要翻译： 用于电液控制系统的先导阀由电磁机电致动器或电动机电机械致动器驱动。 电磁致动的缺点是，在短时间的电力中断时，执行器会导致对先导阀的跳闸响应，而电动机驱动的缺点是，在完全中断电力时，执行器不能独立地引起先导阀的跳闸响应 一经请求。 涉及先导阀的所提出的修改提供了一种实现跳闸响应的手段，而不管所用的机电致动器类型如何，同时克服了电机驱动的缺点。 为了实现行程响应，附加的活塞（连接到电动机致动器的杆）位于致动器杆和先导阀之间。 附加活塞的表面积和先导阀的一个表面积通过液压系统中的油脱扣管线的压力加载。 先导阀的负载表面积在与跳闸相反的方向上产生力，而附加活塞上的力处于跳闸所需的方向。 当需要行程时，跳闸线路中的液压减小，导致（1）致动器杆上的力变为零; 和（2）在先导阀上固有的另一个力将先导阀致动到跳闸状态。 跳闸线路压力的降低由三个由两个三分之一投票方案操作的电子超速跳闸装置操纵的电磁排放阀（每个配备两个电磁线圈）进行。 因此，本发明不仅否定了使用电动执行器的缺点，而且还提供了各种控制系统元件的超速保护和欠载试验。

公开(公告)号：US06719523B2

公开(公告)日：2004-04-13

申请号：US10002924

申请日：2001-11-15

申请人： Naum Staroselsky ,  Mykhailo Volynskyi ,  Dmitry Drob

发明人： Naum Staroselsky ,  Mykhailo Volynskyi ,  Dmitry Drob

IPC分类号： F01D1720

CPC分类号： F01D17/26

摘要： Steam turbine speed-control systems often incorporate pilot valves for the purpose of controlling the position of hydraulic actuators for steam valves. However, the operational efficiency of these pilot valves can suffer from imperfections due to manufacturing defects, wear, and the like, thereby impairing the control system's overall performance. For these reasons, this disclosure relates to a method for overcoming a faulty pilot valve by incorporating a control system (including additional controllers) dedicated to the pilot valve. In this type setup, not only can the position of the pilot valve be a control variable, but the velocity of actuation of this valve can also be used as another control variable. Therefore, the results of separate controllers, using these two control variables, can be combined to improve the dynamic response of the steam turbine speed-control system.

摘要翻译： 蒸汽轮机速度控制系统通常包含导阀，用于控制蒸汽阀的液压执行器的位置。 然而，由于制造缺陷，磨损等，这些先导阀的运行效率将受到缺陷的影响，从而削弱了控制系统的整体性能。 由于这些原因，本公开涉及一种通过结合专用于先导阀的控制系统（包括额外的控制器）来克服故障先导阀的方法。 在这种类型的设置中，不仅可以使先导阀的位置成为控制变量，而且也可以将该阀的致动速度用作另一个控制变量。 因此，使用这两个控制变量的单独控制器的结果可以结合起来，以提高蒸汽轮机速度控制系统的动态响应。