Process for monitoring the gas volume in an hydropneumatic accum

Details Process for monitoring the gas volume in an hydropneumatic accum Process for monitoring the gas volume in an hydropneumatic accum

1987-03-17

1988-11-01

Noland, Tom

Measuring and testing

Volumetric content measuring

73168, G01F 1700, G01M 1900

Patent

active

047810610

ABSTRACT:
In a hydropneumatic accumulator, the gas volume contained therein is monitored by measuring the volume increase in the hydraulic fluid, which takes place during a pressure increase at a given minimum pressure. Moreover, for monitoring purposes, the hydraulic pressure is measured and a signal transmitted at insufficient gas volume as a function of the volume increase and the pressure increase. In order to obtain reliable signals concerning the filling state of the accumulator at all ambient operating temperatures, the temperature of the environment and the gas volume is detected, a standard value for the volume increase proportional to the ratio of the gas temperature to the minimum pressure determined and the volume increase causing the pressure increase compared to this standard value.

REFERENCES:
patent: 3494192 (1970-02-01), Zahid
patent: 4448065 (1984-05-01), Meurer
patent: 4694693 (1987-11-01), Gerlowski
Siemens Zeitschrift, Band 43, No. 4, Apr. 1969, "Leistungsschalter H801-E fur 110 bis 145 kV mit elektrohydraulischem Antrieb"; pp. 285-287; in German.

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