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    • 1. 发明授权
    • Ultrasonic flow nozzle cleaning apparatus
    • 超声波流量喷嘴清洗装置
    • US5123433A
    • 1992-06-23
    • US356162
    • 1989-05-24
    • Daniel E. FridsmaGeorge J. Silvestri, Jr.Michael Twerdochlib
    • Daniel E. FridsmaGeorge J. Silvestri, Jr.Michael Twerdochlib
    • G01F1/44B08B3/12G21F9/28
    • B08B3/12
    • An ultrasonic cleaning apparatus and method is provided for a venturi flow nozzle which is mounted in a pipe having fluid flowing therethrough. The apparatus includes a plurality of ultrasonic transducers mounted in openings provided upstream of the venturi flow nozzle inlet. The transducers transmit ultrasonic waves directly into and thereby excite the fluid flowing through the venturi flow nozzle and create cavitation which cleans the nozzle. Additional transducers are preferably provided in the throat area of the venturi flow nozzle. In alternative embodiments, the transducers are mounted in high and low pressure taps associated with the venturi flow nozzle such that the transducers directly transmit ultrasonic waves into fluid flowing into the high and low pressure taps. The transducers may be mounted flush with the interior of the pipe or venturi flow nozzle, or the transducers may be mounted at a position spaced therefrom in the high and low pressure tap piping.
    • 提供一种用于文丘里流喷嘴的超声波清洗装置和方法,其安装在流体中流过的流体管中。 该装置包括安装在文丘里流喷嘴入口上游的开口中的多个超声换能器。 换能器将超声波直接发射到流经文丘里管喷嘴的流体中,从而激发流过文丘里管喷嘴的流体,并产生清洁喷嘴的空化。 附加的传感器优选地设置在文丘里管喷嘴的喉部区域中。 在替代实施例中,换能器安装在与文氏管流喷嘴相关联的高压和低压抽头中,使得换能器将超声波直接传输到流入高压和低压抽头的流体中。 换能器可以与管或文氏管流动喷嘴的内部齐平地安装,或者换能器可以安装在与高压和低压抽头管道隔开的位置。
    • 5. 发明授权
    • Turbine governor valve monitor
    • 涡轮调速阀监控
    • US4878348A
    • 1989-11-07
    • US250198
    • 1988-09-28
    • Daniel E. Fridsma
    • Daniel E. Fridsma
    • F01D17/08F01D17/18
    • F01D17/18F01D17/08
    • A method and apparatus for continually monitoring the operating state of a set of governor valves (42,60) in a steam supply system for the first stage of a high pressure turbine during operation of the turbine, the system including a source including a throttle valve (40) for supplying steam at a defined pressure to the governor valves (42,60) and a plurality of nozzles (44) each connected to deliver steam from a respective governor valve (42,60) to a respective turbine inlet region, by the steps of: monitoring (52) the pressure at the outlet of each governor valve (42,60); monitoring (50,54) the pressure at the inlet to the throttle valve(s) (40) and at the turbine first stage; and comparing (56) the monitored outlet pressure of each governor valve (42,60) with the monitored pressure at the throttle valve inlet and at the turbine first stage in order to provide an indication of the operating state of each governor valve (42,60) and to detect and alert power plant operators of valve malfunctions or inefficient operation.