Device and method for widening stable operation area of ​​centrifugal compressor and centrifugal compressor

Abstract

The invention discloses a device for widening a stable operation area of a centrifugal compressor. The device comprises a plurality of high frequency response dynamic pressure sensors, a high frequency response dynamic strain indicator, signal conditioning equipment, a signal processing digital signal processor (DSP) module, and an air jet device, wherein the dynamic pressure sensors and the dynamic strain indicator acquire dynamic signals of the compressor during operation; the signal conditioning equipment transmits the signals to the DSP module; and the DSP module processes the signals and sends a command to a controller so as to make the air jet device act. The device can widen the stable operation area of the centrifugal compressor, namely a stability working range, and eliminates or reduces the harm of flow instability, namely stall and surge. The invention also discloses a method for widening the stable operation area of the centrifugal compressor, and a centrifugal compressor provided with the device for widening the stable operation area of the centrifugal compressor.

Description

technical field [0001] The invention relates to an accessory of a centrifugal compressor, in particular to a device for widening the stable operation area of ​​the centrifugal compressor. The invention also relates to a method for widening the stable operating region of the centrifugal compressor. The invention also relates to a centrifugal compressor provided with means for widening the stable operating region of the centrifugal compressor. Background technique [0002] Centrifugal compressors, as a general-purpose machine for increasing gas pressure, have been widely used in many sectors of the national economy and occupy an important position, especially in the metallurgical industry (blast furnace blast, oxygen steelmaking, oxygen production, etc.) , petrochemical (oil field gas injection, synthetic ammonia, urea, ethylene, petroleum refining, etc.), natural gas transmission, refrigeration, aviation and power (aero engines, gas turbines, internal combustion engine super...

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Problems solved by technology

Or use the method of casing treatment and bleed or backflow, but on the one hand, this method cannot make full use of the potential of the compressor, and it is easy to reduce the efficiency of the compressor at the non-surge point; on the other hand, this method is mostly in the Measures such as deflation are taken at the outlet of the compressor. Since the action cannot be near the fundamental position that caused the instability, the speed of releasing the instability is relatively slow, and it will cause a huge waste of energy.

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