Tail gas and noise processing mechanism

Abstract

The invention discloses a tail gas and noise processing mechanism which comprises a cylinder body. A noise reduction cavity is formed in the cylinder body, the two ends of the cylinder body are provided with an air inlet and an air outlet respectively, two partition plates and two baffles are sequentially arranged in the noise reduction cavity in the direction of an air outlet, the upper portions of the two partition plates are communicated with the lower portions of the two baffles through connecting pipes, the lower portions of the partition plates are provided with a plurality of through holes, the upper portions of the baffles are provided with a plurality of air holes, a ventilation pipe is connected between the air outlet and an air inlet and penetrates through the partition plates and the baffles, and a pneumatic control valve is arranged on the connection position of the ventilation pipe and the air inlet. The tail gas and noise processing mechanism further comprises hollow noise reduction bulges which are arranged on the through holes in the direction back to the air inlet. When air flow across the air inlet is smaller, the air flow generates smaller noise accordingly, the pneumatic control valve is shut off directly, the airflow is discharged from the air outlet and through the ventilation pipe, and the service life of the noise reduction device is prolonged.

Description

technical field [0001] The invention relates to a muffler, in particular to an exhaust noise processing mechanism. Background technique [0002] Traffic noise is the pollution source with the strongest radiation and the widest influence in the urban environment. In the noise of motor vehicles, exhaust noise is one of the main noise sources. Its reduction is mainly through the installation of exhaust mufflers. After the muffler is installed, it will inevitably have a great impact on the engine; the power loss of the general muffler is 3% to 8%. Larger power loss is allowed when the muffler is larger; lower power loss is required for the muffler matching the low-power engine. [0003] The number of automobiles in our country is increasing, and people's requirements for automobiles are no longer just means of transportation, but also energy-saving, environmental protection, aesthetics and comfort. Traffic noise from motor vehicles is the main source of noise on urban roads, a...

AI Technical Summary

Problems solved by technology

However, in the production and processing of general mufflers, the resistive mufflers and resistive mufflers mainly used in the market can only deal with high-frequency or low-frequency noise separately, and the scope of application is not wide. In terms of: in high temperature, water vapor, and gas that is corrosive to sound-absorbing materials, the service life of the muffler is short, and the effect on low-frequency noise is poor; the biggest disadvantage is that the power loss of the muffler is too large; and in the general single muffler filter The effect of the hole on the noise treatment is not obvious, which in turn affects the efficiency of the entire noise reduction process

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