Self-regulating wide-frequency gas pulsation attenuator of variable-rotation-speed compressor and control method of self-regulating wide-frequency gas pulsation attenuator

Abstract

The invention discloses a self-regulating wide-frequency gas pulsation attenuator of a variable-rotation-speed compressor and a control method of the self-regulating wide-frequency gas pulsation attenuator. The self-regulating wide-frequency gas pulsation attenuator consists of a self-stretching container, a rolling ball lead screw, a drive device and a control unit. The self-regulating wide-frequency gas pulsation attenuator is mounted on a valve cavity of the compressor through a mounting hole of a compressor gas valve; a container cavity communicates with the valve cavity of the compressorthrough a lead screw; resonance frequency of the attenuator can be automatically regulated by changing length of the stretching container and the lead screw; under a variable-rotation-speed working condition, main excitation frequency of a compressor system can be monitored in real time, and the dimension of the attenuator is automatically regulated, so that resonance frequency of the attenuator is ensured to be equal to the main excitation frequency of the compressor system in real time, active attenuation, on gas pulsation of the main excitation frequency in the valve cavity of the compressor, is realized in real time under the variable-rotation-speed working condition, and the defects that common attenuator is fixed in cut-off frequency and is not practical under the variable-rotation-speed working condition are solved; and moreover, the self-regulating function improves application efficiency and working reliability of the attenuator.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and relates to a variable-speed compressor self-adjusting broadband airflow pulsation attenuator and a control method thereof, which is especially suitable for variable-speed compressors and is generally installed at the valve cavity of the compressor. Background technique [0002] Compressors are widely used in petrochemical and other fields. As the world's energy becomes increasingly tense, energy conservation and emission reduction has gradually become a threshold for industrial development. Variable speed is a common method used by compressors to adjust gas volume to achieve energy conservation. Airflow pulsation is the main cause of vibration and noise in the compressor piping system. The airflow pulsation in the valve cavity is the excitation source of airflow pulsation in the piping system, and the airflow pulsation at the main excitation frequency has the greatest impact. [0003] According...

AI Technical Summary

Problems solved by technology

The size of the traditional air flow pulsation attenuator is fixed, that is, the resonance frequency is fixed, and the main excitation frequency of the compressor changes under the condition of variable speed. The traditional attenuator is no longer applicable to the condition of variable speed, and the existing adjustable attenuator can adjust The range is narrow, and it must be adjusted manually, requiring real-time monitoring by manpower, which is time-consuming and laborious

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