초록

To prevent surge in a compressor, the flow therethrough is automatically altered when the static pressure differential taken laterally across one of its diffuser vanes approaches a magnitude indicative of a surge condition.

대표청구항 ▼

A method of preventing surge in a compressor flowing pressurized gas through a mutually spaced series of diffuser vanes each having a leading end, trailing end, a pressure side surface, and a suction side surface, said method comprising the steps of: (a) sensing a static pressure adjacent the pressu

A method of preventing surge in a compressor flowing pressurized gas through a mutually spaced series of diffuser vanes each having a leading end, trailing end, a pressure side surface, and a suction side surface, said method comprising the steps of: (a) sensing a static pressure adjacent the pressure side surface of a diffuser vane; (b) sensing a static pressure adjacent the suction side surface of a diffuser vane; (c) sensing a reference static pressure; (d) generating signal having a magnitude equal to (P1-P2)/(P1-P3), where P1 is the reference static pressure, P2 is the static pressure sensed adjacent the vane pressure side surface, and P3 is the static pressure sensed adjacent the vane suction side surface, said signal haing a magnitude indicative of the proximity of the compressor operating point to the surge line associated with such operating point; and (e) increasing the flow through the compressor, prior to the onset of surge in any portion thereof, when the magnitude of said signal reaches a predetermined value thereof.