Apparatus for making diagnosis of valve device in turbine system

Details Apparatus for making diagnosis of valve device in turbine system Apparatus for making diagnosis of valve device in turbine system

1982-08-05

1985-06-11

Krass, Errol A.

Boots, shoes, and leggings

73 9, 137551, 137554, 137557, 364550, F16K 3700

Patent

active

045232865

ABSTRACT:
A diagnostic apparatus for diagnosising of a valve device in a turbine system comprises at least one of a pressure sensor for sensing hydraulic pressure in a hydraulic cylinder for driving a valve body of the valve device and a position sensor for sensing the displacement of the valve body, and a processing device for processing the output signal from the above-mentioned at least one sensor. The processing device has an offset computing device which receives a signal representing the actual operating state of the valve device obtained on the basis of the output signal from the at least one sensor and a signal corresponding to a reference value obtained under the normal operating state of the valve device. The offset computing device is operable to compute the offset between the signals received thereto. A judging device is provided for judging as to whether or not there is a symptom of a sticking in the valve device, in accordance with the output signal from the offset computing device.

REFERENCES:
patent: 4029122 (1977-06-01), Jaegtnes
patent: 4090065 (1978-05-01), Braytenbah et al.
patent: 4274438 (1981-06-01), La Coste
patent: 4404637 (1983-09-01), Walters et al.

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