FIELD: compressor engineering. SUBSTANCE: air pressure is measured downstream of a compressor, downstream of the first group of compressor stages and at the edge of a nozzle. When the rate of varying air pressure downstream of the first group of the compressor stages and at the edge of the nozzle as well as downstream of the compressor exceeds a threshold value, a signal about surging is generated. The device has pressure pickups downstream of the first group of compressor stages and at the edge of the nozzle, second and third differentiators, third threshold element, and second AND element. EFFECT: enhanced reliability. 3 cl, 2 dwg
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