Capacity-tube-capacity type gas-flow pulsation attenuator of compressor

Abstract

The invention discloses a capacity-tube-capacity type gas-flow pulsation attenuator of a compressor. The capacity-tube-capacity type gas-flow pulsation attenuator mainly consists of an accommodating cavity, an interpolated throat tube, an extrapolated throat tube with an adjustable valve opening, and a partition, wherein the attenuator is mounted between the compressor and a pipeline through a flange; the partition is used for dividing the accommodating cavity into two small accommodating cavities; the interpolated throat tube communicates with the extrapolated throat tube for regulating opening of a valve on the extrapolated throat tube, so that cut-off frequency of an acoustic low-pass filter which consists of two small accommodating cavities and a middle connecting throat tube can be changed, and therefore, main excitation of the compressor and gas-flow pulsation wave corresponding to the frequency are greatly reduced, pulsation gas flow in the pipeline tends to be stable, and the problem that a conventional pulsation attenuator only can effectively attenuate gas-flow pulsation in a fixed-rotation-speed compressor pipeline and is poor in pulsation attenuation effect in the variable-rotation-speed compressor pipeline is solved. The capacity-tube-capacity type gas-flow pulsation attenuator can be conveniently mounted at a gas inlet flange and a gas outlet flange of the compressor, and further can be simultaneously used with a Helmholtz resonator or other pulsation attenuators.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and relates to a volume-tube-volume air flow pulsation attenuator, in particular to a volume-tube-volume air flow pulsation attenuator for variable-speed reciprocating compressors. Background technique [0002] As the "heart" equipment for pressurizing and transporting gas, compressors are widely used in petroleum, chemical industry, aerodynamics and other fields, especially reciprocating piston compressors, whose periodic suction and exhaust will stimulate strong vibration in the pipeline system. Air pulsation. The air flow pulsation in the pipeline will induce the vibration and noise of the compression system, bring safety hazards, and reduce the economy and reliability of the compressor. Moreover, the severe air flow pulsation in the pipeline will greatly increase the power consumption of the compression system, which violates the demand for energy saving and emission reduction. [0003] At pr...

AI Technical Summary

Problems solved by technology

The air flow pulsation in the pipeline will induce the vibration and noise of the compression system, bring safety hazards, and reduce the economy and reliability of the compressor

Moreover, the severe air flow pulsation in the pipeline will greatly increase the power consumption of the compression system, which violates the demand for energy saving and emission reduction.

[0003] At present, the commonly used devices for reducing air flow pulsation are mainly designed based on the principle of avoiding resonance under the condition of constant speed. Under working conditions, the attenuation effect of airflow pulsation in the pipeline is very poor; by designing the cut-off frequency of the volume-tube-volume airflow pulsation attenuator to fix it at the main excitation frequency at the lowest speed, this attenuator can effectively attenuate The airflow in the pipeline fluctuates at variable speed, but as the speed increases, the flow velocity in the pipeline increases, which will greatly increase the resistance loss of the volume-tube-volume airflow pulsation attenuator

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