Low noise control method

Abstract

The invention relates to a low noise control method. The method is characterized in that an annular gap is formed between an air compressor shell and a rotor blade of a rotor of a supercharger system,the air compressor shell is internally provided with an air compressor inner wall, an air feeding cavity is defined by the air compressor inner wall, and the air feeding cavity communicates with theannular gap; an airflow channel which is arranged in the direction of airflow in the air feeding cavity is formed between the air compressor shell and air compressor inner wall; and the air compressorinner wall is provided with an executing mechanism which is used for allowing the airflow to flow through an outlet of the airflow channel or preventing the airflow from flowing through the outlet ofthe airflow channel. The low noise control method comprises the steps of jointly changing low-frequency and medium-frequency noise through a silencing ring and a flow expanding groove, and reducing high-frequency noise through the executing mechanism. The invention provides the supercharger system and the low noise control method. According to the system and the method, the structure of a supercharger is improved, the noise is cut off on a sound wave transmission path, the system is applicable to all radial flow type superchargers, and the problem that the low-frequency and medium-frequency noise and the high-frequency noise can not be reduced simultaneously in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a low noise control method. Background technique [0002] With the increasingly stringent requirements for carbon emission restrictions, supercharging technology has become an inevitable choice for the development of engine technology. As the pressure ratio of the supercharger has gradually increased in recent years, people's requirements for the comfort of the engine have also begun to increase, resulting in the noise problem of the supercharger becoming an issue that manufacturers and users are paying more and more attention to. [0003] At present, the most common means to directly solve the noise problem of a flow-type exhaust gas turbocharger is to use a muffler ring and / or a flow widening groove. Among them, the muffler ring acts as a flow guide, which can make the air flow field more smooth and stable, thereby reducing some aerodynamic noise; the flow widening groove can ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a supercharger system and a low-noise control method, improve the structure of the supercharger, cut off the noise from the sound wave transmission path, apply to all radial-flow superchargers, and solve the current problem. There is a problem that the technology cannot reduce the low-frequency noise and high-frequency noise at the same time

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