SCREW COMPRESSOR SLIDE VALVE HAVING AIRFLOW PULSATION ATTENUATION FUNCTION AND SCREW COMPRESSOR

摘要

A screw compressor slide valve (20) that has an airflow pulsation attenuation function and a screw compressor. The slide valve (20) is mainly composed of a wall surface (21) and slide valve through holes (24). On one hand, exhaust of the screw compressor is directly discharged from an exhaust orifice into an exhaust cavity to form a main flow channel (31), and on the other hand, an air flow channel is delayed and discharged from the exhaust orifice through the slide valve through holes (24) to the exhaust cavity to form a side branch flow channel (32). Due to the longer air flow channel in the slide valve (20), when a pulsating phase of an air flow in the side branch flow channel (32) lags behind the phase in the main flow channel (31) by 180 degrees, the pulsations of the air flows in the two flow channels cancel each other out due to the opposite phases,thus attenuating the air flow pulsation of the screw compressor and suppressing vibrations and noise induced by the pulsation of the exhaust air flow of the compressor. The air flow pulsation attenuation effect of the screw compressor slide valve (20) is only related to the depth of the through holes (24) at an inner part of the slide valve (20). The influence of the content of a lubricating medium in the exhaust gas on the air flow pulsation attenuation effect is solved, and the present invention has characteristics such as a simple structure, small pressure loss, strong practical applications, good vibration and noise reduction effects, and so on.