A slide valve of screw compressor with airflow pulsation attenuation function

Abstract

The invention provides a screw compressor slide valve having a gas flow pulsation attenuation function. The slide valve mainly comprises a wall surface and a slide valve through hole. On the one hand,exhaust of a screw compressor is directly discharged into an exhaust chamber via an exhaust orifice to form a main flow channel, and on the other hand, the exhaust is discharged into the exhaust chamber from the exhaust orifice through a slide valve through hole gas flow passage in a delayed manner to form a lateral flow channel. The gas flow passage inside the slide valve is relatively long, when the phase of the gas flow pulsation inside the lateral flow channel lags behind the phase inside the main flow channel by 180 degrees, the gas flow pulsation inside the lateral flow channel and thegas flow pulsation inside the main flow channel offset each other due to the opposite phases, the gas flow pulsation of the screw compressor is attenuated, and the vibration noise caused by the gas flow pulsation of the exhaust of the compressor is suppressed. According to the slide valve, the gas flow pulsation attenuation effect of the screw compressor slide valve is only related to the depth ofthe through hole inside the slide valve, the influence caused by the content of a lubrication medium inside the exhaust gas to the gas flow pulsation attenuation effect is eliminated, and the slide valve has the characteristics of simple structure, low pressure loss, high practical practicability, good vibration and noise reduction effect and the like.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction and noise reduction of fluid machinery, and relates to a slide valve of a screw compressor with the function of attenuating air flow pulsation. Background technique [0002] Screw compressor, as a general equipment for increasing gas pressure and transporting gas, has been widely used in petroleum, natural gas, chemical industry, metallurgy and other fields. The screw compressor is a rotary volumetric compressor. Driven by the motor, the male rotor and the female rotor mesh with each other and rotate synchronously to form a periodic change in the volume of the working chamber, thereby realizing the working process of suction, compression and exhaust. The periodic suction and exhaust of the screw compressor will cause periodic fluctuations in the gas pressure and flow in the discharge chamber, resulting in airflow pulsation. The air flow pulsation of the screw compressor will not only ...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of airflow pulsation in the exhaust process of the screw compressor from the source, and provides a slide valve of the screw compressor with the function of attenuating the airflow pulsation, which can suppress the pulsation of the exhaust airflow of the screw compressor and reduce the airflow pulsation-induced vibration noise

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