Turbocharger compressor volute with noise reduction function

Abstract

Provided is a turbocharger compressor volute with a noise reduction function. The turbocharger compressor volute with the noise reduction function comprises a shell, and an air inlet channel with the two ends open is formed in the shell. The shell is further provided with a plurality of annular silencing cavities which surround the air inlet channel and are arranged at intervals in the axial direction. Every two adjacent annular silencing cavities communicate with each other through a plurality of silencing holes B. A plurality of silencing holes A used for enabling the annular silencing cavity closest to the air inlet edge of the air inlet opening section to communicate with the air inlet channel are formed in the air inlet opening section. The shell is further provided with a secondary air inlet slot used for enabling the air inlet channel to communicate with the annular silencing cavity furthest from the air inlet edge of the air inlet opening section. The turbocharger compressor volute with the noise reduction function has the advantages that the three annular silencing cavities are designed according to the silencing frequency range, every two adjacent cavities communicate with each other through the silencing holes B, accordingly an expanded cavity structure is formed, and different voice frequencies are eliminated according to different expansion ratios; and meanwhile, the three cavities are combined, a silencing frequency band can be formed through simulating calculation, the effect of lowering noise within a small space is achieved, and the surge-resistant control effect is also achieved.

Description

technical field [0001] The invention relates to components on a turbocharger, in particular to a turbocharger compressor volute with a noise reduction function. Background technique [0002] With the improvement of the performance of the vehicle engine, the working range of the turbocharger also needs to be gradually expanded, but the compressor surge has always been a stumbling block accompanying the development of the compressor performance, which affects the stability of the airflow when the turbocharger is working. If the effective working range of the engine cannot be improved, it will eventually affect the improvement of the working range of the entire engine. [0003] The root cause of compressor surge is that the airflow field in the compressor produces local distortion at small flow rates, that is, when the flow rate is too small, the airflow first undergoes a pressure change at the outlet of the impeller, and produces an airflow disturbance at the outlet. The airf...

AI Technical Summary

Problems solved by technology

When the turbocharger surges, the air at the intake end of the compressor is blocked, and part of the air is separated from the blades of the compressor, swirls, and fluctuates, causing a harsh whistling sound, which causes noise pollution and also causes front of the supercharger The vibration of the intake pipe and the high-frequency axial vibration of the rotor shaft will make the working state of the engine tend to be unstable, thereby affecting the working life of the engine and turbocharger

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