公开(公告)号：US5087909A

公开(公告)日：1992-02-11

申请号：US395633

申请日：1989-08-18

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01R31/12 ,  G01R31/34 ,  H02P9/00

CPC classification number: G01R31/343

Abstract: A method and apparatus which indicates an actual arc occurrence only if a voltage or current of a generator neutral lead exceeds a specified threshold amplitude, and is followed by a second RF signal again exceeding the threshold amplitude and occurring within a specified time period.

Abstract translation: 仅在发电机中性线的电压或电流超过规定的阈值振幅的情况下才指示实际的电弧发生的方法和装置，并且后面是再次超过阈值振幅并在特定时间段内发生的第二RF信号。

公开(公告)号：US4970670A

公开(公告)日：1990-11-13

申请号：US277832

申请日：1988-11-30

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01K1/20 ,  G01K13/08

CPC classification number: G01K13/08 ,  G01K1/20

Abstract: A system for monitoring the temperature of a plurality of turbine blade shroud segments includes indicia carried by each shroud segment. A sensor produces input signals in response to the indicia. A temperature sensor measures the temperature of the sensor producing the input signals. A first circuit, responsive to the temperature sensor, corrects the input signals to compensate for the effects of temperature on the sensor. A second circuit determines the temperature of each shroud segment based on the corrected input signals.

Abstract translation: 用于监测多个涡轮机叶片护罩段的温度的系统包括由每个护罩段承载的标记。 传感器响应于标记产生输入信号。 温度传感器测量产生输入信号的传感器的温度。 响应于温度传感器的第一电路校正输入信号以补偿温度对传感器的影响。 第二电路基于校正的输入信号确定每个护罩区段的温度。

公开(公告)号：US4922233A

公开(公告)日：1990-05-01

申请号：US190323

申请日：1988-05-05

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01F1/68 ,  F01D25/00 ,  F01D25/32 ,  F16T1/48 ,  F17D5/00 ,  G01F1/684 ,  G01F1/69 ,  G01F1/696 ,  G01M3/00 ,  G05B23/02

CPC classification number: F16T1/48 ,  G01F1/6847 ,  G01M3/002 ,  G05B23/0216 ,  G05B23/0235 ,  G05B23/0262

Abstract: A flow sensor includes a strap-on heater attached to a fluid conduit downstream of a drain valve and two differential temperature measuring thermocouples attached to the fluid conduit downstream of the heater. A monitoring system employing at least one of the flow sensors further includes a controller which receives the differential temperature signal produced by the two thermocouples, a signal indicative of a selected valve position, and a signal indicative of steam turbine operating condition, i.e., hot or cold. The controller includes a logic circuit for correlating the differential temperature value signal, the valve position signal and the steam turbine condition signal to a diagnosis of the drain valve condition.

Abstract translation: 流量传感器包括附接到排水阀下游的流体导管的带式加热器和连接到加热器下游的流体导管的两个差分温度测量热电偶。 采用至少一个流量传感器的监测系统还包括控制器，其接收由两个热电偶产生的差分温度信号，指示所选阀位置的信号和指示蒸汽轮机操作条件的信号，即热或 冷。 控制器包括用于将差温值信号，阀位置信号和汽轮机状况信号相关联到排水阀状态的诊断的逻辑电路。

公开(公告)号：US4898021A

公开(公告)日：1990-02-06

申请号：US277827

申请日：1988-11-30

Applicant: Karen L. Weaver ,  Michael Twerdochlib

Inventor： Karen L. Weaver ,  Michael Twerdochlib

IPC: G01M3/20

CPC classification number: G01M3/202

Abstract: An improved tracer gas leak detection system and method for air inleakage testing of a turbine-condenser system quantified leak testing with two new elements: one, by providing discharge of a fixed, reproducible amount of tracer gas at a possible leak site, which is accomplished by controlling the flow rate, pressure and time interval of the discharge. Secondly, the total amount of tracer gas subsequently detected within the turbine-condenser is determined by integrating the detector response.

公开(公告)号：US4859076A

公开(公告)日：1989-08-22

申请号：US196706

申请日：1988-05-20

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01K1/08 ,  G01K3/14

CPC classification number: G01K3/14 ,  G01K1/08

Abstract: A heated, split thermowell comprises a cylindrical shank and integral, axially extending, part-cylindrical probes spaced by at least a first gap defined by a bilateral plane. The thermowell is mounted to the sidewall of a pressure vessel for communicating through a penetration in the sidewall with the fluid state in the pressure vessel. Each probe has at least one parallel axial bore therein, a related, selected pair of probes receiving respective heater and temperature sensing elements in the associated bores, and together functioning as a differential temperature sensor producing distinguishable, differential temperature outputs representative of the fluid condition of steam versus water. Duplex sensor embodiments permit toggling between different, selected such pairs of probes for on-line testing and verification of monitored conditions and operability of the elements and supporting circuits, with automatic substitution of complementary elements in the event of element failure. Each thermowell also permits on-line replacement of a failed element.

Abstract translation: 加热的分离热电偶套管包括圆柱形柄和整体的，轴向延伸的部分圆柱形探针，其间隔至少由双边平面限定的第一间隙。 热电偶套管安装在压力容器的侧壁上，用于通过在压力容器中的流体状态穿过侧壁进行连通。 每个探头具有至少一个平行的轴向孔，相关的选定的一对探针，其在相关联的孔中接收相应的加热器和温度感测元件，一起用作差分温度传感器，用于产生代表蒸汽流体状态的可区别的差分温度输出 与水。 双工允许在不同的选定的这种探针对之间切换，用于在线测试和检测监测的条件以及元件和支持电路的可操作性。 在元件故障的情况下，会自动替换补充元件。 每个热套管也允许在线更换故障元件。 -

公开(公告)号：US4833931A

公开(公告)日：1989-05-30

申请号：US85510

申请日：1987-08-14

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: F01D21/00 ,  F01D25/00 ,  G01B5/00 ,  G01B7/14 ,  G01H1/00

CPC classification number: G01B5/0014 ,  G01B7/14 ,  G01H1/006

Abstract: A thermally self-adjusting mount for a proximity sensor for detecting movement of a turbine blade tip within a turbine housing includes an elongated chamber in an interior wall of the turbine housing adjacent the path of travel of the turbine blade tip. The chamber is configured to receive a blade tip sensor therein and accommodate relative movement of the sensor toward and away from the path of travel of the blade tip. A thermally expansive element is operable coupled with the sensor for moving the latter in the chamber toward the path of travel of the blade tip upon heating of the sensor. A spring is provided for maintaining the sensor in contact with the thermally expansive element during both expansion and contraction of the latter. The thermally expansive member is capable, upon being heated to any given temperature, of causing movement of the sensor in the chamber and relatively toward the path of travel of the blade tip a distance which is substantially the same as the linear movement of the wall away from the path of travel due to having been heated to the same temperature. Thus, the spatial relationship between the sensor and the path of travel of the blade tip remains the same at different temperatures.

Abstract translation: 用于检测涡轮机壳体内的涡轮机叶片尖端的运动的接近传感器的热自调节安装座包括与涡轮机叶片尖端的行进路径相邻的涡轮机壳体的内壁中的细长室。 腔室被构造成在其中容纳叶片尖端传感器，并且适应传感器朝向和远离叶片尖端行进路径的相对运动。 热膨胀元件可操作地与传感器耦合，用于将腔室中的腔室朝向在传感器加热时的刀片行程的路径移动。 提供弹簧，用于在膨胀和收缩过程中使传感器与热膨胀元件接触。 热膨胀构件在加热到任何给定温度时能够使传感器在腔室中的运动并且相对于叶片尖端的行进路径移动，该距离与壁的线性运动基本相同 由于已经被加热到相同温度的行进路径。 因此，传感器与叶片尖端的行进路径之间的空间关系在不同的温度下保持不变。

公开(公告)号：US4790194A

公开(公告)日：1988-12-13

申请号：US44625

申请日：1987-05-01

Applicant: James C. Bellows ,  Michael Twerdochlib

Inventor： James C. Bellows ,  Michael Twerdochlib

IPC: G01F1/22 ,  G01F1/36 ,  G01F1/42 ,  G01F7/00

CPC classification number: G01F1/363 ,  G01F1/22 ,  G01F1/42 ,  G01F7/00 ,  G01F7/005

Abstract: Fluid flow is determined for a large flow pipe based upon differential pressure across an orifice in the pipe having a known cross-sectional area. In one form, the orifice is variable and adjusted in response to differential pressure so as to maintain differential pressure at a constant value. Flow is determined directly from orifice area. The orifice may be a part of a closed loop flow measurement system which responds to differential pressure changes to adjust orifice area. Various differential pressure settings may be used to accommodate selected back pressures in the flow pipe.

Abstract translation: 基于具有已知横截面积的管中的孔口上的压差来确定大流量管道的流体流动。 在一种形式中，孔是可变的并且响应于压差被调节，以将差压保持在恒定值。 流量从孔面积直接确定。 孔可以是闭环流量测量系统的一部分，其响应差压变化以调节孔面积。 可以使用各种差压设置来适应流管中的选定的背压。

公开(公告)号：US4790189A

公开(公告)日：1988-12-13

申请号：US20827

申请日：1987-03-02

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01H17/00 ,  F01D25/00 ,  G01H1/00 ,  G01M99/00 ,  G01H11/00

CPC classification number: G01H1/006

Abstract: A method is disclosed for eliminating aberrations in position-time data provided by an apparatus which monitors the position of a rotating blade in a turbo machine as a function periodic rotation, the apparatus including at least one sensor adjacent at least one blade position to provide a time signal corresponding to the actual arrival time required for a blade to move from a predetermined position to the at least one sensor position, the aberrations being caused by misalignment or movement of the at least one sensor with respect to a rotating blade. The method comprises the steps of first calculating an average blade arrival time for blade movement from the predetermined position to the at least one sensor position, and then estimating sensor position relative to the predetermined position based on blade velocity and average arrival time. Alternatively, measured displacements between blade position and sensor position at the average blade arrival time may be used to derive a time signal indicative of blade vibration.

Abstract translation: 公开了一种用于消除由在涡轮机中将旋转叶片的位置监测为功能周期性旋转的装置提供的位置时间数据中的像差的方法，该装置包括至少一个与至少一个叶片位置相邻的传感器，以提供 时间信号对应于叶片从预定位置移动到至少一个传感器位置所需的实际到达时间，像差是由至少一个传感器相对于旋转叶片的不对准或移动引起的。 该方法包括以下步骤：首先计算叶片从预定位置移动到至少一个传感器位置的平均叶片到达时间，然后基于叶片速度和平均到达时间估计相对于预定位置的传感器位置。 或者，可以使用在平均叶片到达时间的叶片位置和传感器位置之间的测量位移来导出指示叶片振动的时间信号。

公开(公告)号：US4676665A

公开(公告)日：1987-06-30

申请号：US864670

申请日：1986-05-19

Applicant: Michael Twerdochlib

Inventor： Michael Twerdochlib

IPC: G01K1/02 ,  G01K11/02 ,  G01K1/12 ,  G01N29/00

CPC classification number: G01K1/024 ,  G01K11/02

Abstract: A liquid-filled tube placed next to a generator winding section provides an indication of an abnormal hot spot which may develop along the winding. The tube is filled with a liquid which vaporizes to form a vapor bubble at the hot spot location. Acoustic energy is projected through the liquid in the tube and is normally received at the distal end of the tube. Presence of a vapor bubble blocks the acoustic propagation and forms a reflective surface for the acoustic energy which then is utilized to calculate distance to the vapor bubble. With a known pressure versus temperature relationship, the pressure of the liquid is controlled such that the hot spot temperature may be determined.

Abstract translation: 放置在发电机绕组部分旁边的充满液体的管提供了可能沿着绕组发展的异常热点的指示。 该管充满液体，其在热点位置蒸发以形成蒸气泡。 声能通过管中的液体投射，并且通常被容纳在管的远端。 蒸汽气泡的存在阻止声传播，并形成声能的反射表面，然后该声能用于计算到蒸气泡的距离。 利用已知的压力对温度关系，控制液体的压力使得可以确定热点温度。

公开(公告)号：US09016991B2

公开(公告)日：2015-04-28

申请号：US13863473

申请日：2013-04-16

Applicant: Michael Twerdochlib ,  Edward David Thompson ,  Evangelos V. Diatzikis

Inventor： Michael Twerdochlib ,  Edward David Thompson ,  Evangelos V. Diatzikis

IPC: F16B31/02 ,  H02K1/16 ,  B23P19/06 ,  G01L5/24 ,  G01L1/24 ,  H02K11/00 ,  G01D5/353

CPC classification number: H02K1/16 ,  B23P19/067 ,  F16B31/028 ,  G01D5/35316 ,  G01L1/246 ,  G01L5/243 ,  H02K11/20

Abstract: A generator stator core through-bolt tensioning device that automatically tightens the nut on the through-bolts that hold together and compress laminate plates of the stator core in a high voltage generator. A controller receives a signal from a measuring device, such as a fiber Bragg grating that measures the strain on the bolt, and based on that signal determines whether the nut needs to be tightened. If the controller determines that tightening is necessary, it will cause the tensioning device to automatically tighten the nut while the generator is in service, and use the measuring device to provide feedback of the tensioning of the through-bolt to know when to stop the device from tightening the nut.

Abstract translation: 发电机定子铁心贯通螺栓张紧装置，自动拧紧固定在一起的螺栓上的螺母，并将高压发生器中的定子铁心的压板压缩。 控制器接收来自测量装置的信号，例如测量螺栓上的应变的光纤布拉格光栅，并且基于该信号确定螺母是否需要拧紧。 如果控制器确定需要紧固，则会在发电机使用时使张紧装置自动拧紧螺母，并使用测量装置提供贯穿螺栓张紧的反馈信息，以知道何时停止装置 拧紧螺母。