Air valve noise suppression system and suppression method for rail transit oil-free air compressor

Abstract

The invention provides an air valve noise suppression system and method for a rail transit oilless air compressor. The air valve noise suppression system comprises an air filter, a cylinder cover, a crankcase and an air inlet pipeline. An air inlet of the crankcase communicates with an exhaust port of the air filter, and an air outlet of the crankcase communicates with the cylinder cover through the air inlet pipeline. The cylinder cover comprises a cylinder air inlet, a cylinder air outlet, a suction cavity and an exhaust cavity. The cylinder air inlet communicates with the suction cavity, and the cylinder air outlet communicates with the exhaust cavity. The suction cavity and the exhaust cavity are both annular inner cavities arranged in the cylinder cover. The suction cavity is arranged between the inner ring side face of the exhaust cavity and the central axis of the cylinder cover. The air valve noise suppression system is simple in structure, the crankcase is used as a buffer tank of the air inlet pipeline through the creative design, and suction noise generated before inlet air flow enters a cylinder can be lowered by absorbing noise on the air valve suction side multiple times in a labyrinth mode. In addition, through the unique design of the cylinder cover, suction noise can be prevented from coming out, and the high-frequency spectrum is lowered.

Description

technical field [0001] The invention relates to an air valve noise suppression system and a suppression method of an oil-free air compressor, in particular to a valve noise suppression system and a suppression method of an oil-free air compressor for rail transit. Background technique [0002] Oil-free air compressors play a vital role in rail transportation. They usually provide pneumatic systems for rail vehicles, and operate the brakes of rail vehicles through the pneumatic system. The oil-free air compressors used in rail transit are all piston air compressors. At present, piston air compressors generally have the problems of large valve noise and high frequency components, which have a certain impact on the surrounding environment. The main influencing factor is the intake and discharge of the airflow during the operation of the air compressor. The components involved in the intake and discharge of the airflow are the air filter and the cylinder head connected to the ai...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a valve noise suppression system and suppression method for rail transit oil-free air compressors, so as to solve the problem that the existing rail transit oil-free air compressors cannot meet the requirements of rail transit vehicles due to the large noise. noise requirements

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