Silencer structure

Abstract

The invention discloses a silencer structure. A first chamber is formed between a left partition board and a left shell, a second chamber is formed between a right partition board and a right shell, and the second chamber is communicated with the first chamber through first pores. A third chamber is formed by the upper parts of the non-overlapped parts of the left and right partition boards, the third chamber is communicated with the second chamber through second pores, an exhaust pipe is formed by the lower parts of the non-overlapped parts of the left and right partition boards, and the length of the exhaust pipe is 50 to 70 millimeters. The volume ratio of the first chamber to the second chamber and the volume ratio of the second chamber to the third chamber are 1.9 to 2.1. The sizes of the first pore and the second pore are equal, and the apertures are 3.2 to 3.5 millimeters. The silencer structure can effectively reduce noise by 1.5 to 2dB without reducing the performance of a gasoline engine, fulfills the purpose of de-noising, thoroughly solves the problem of poor applicability of a vertical axis gasoline engine silencer, and prolongs the service life of the silencer.

Description

technical field [0001] The invention belongs to the technical field of gasoline engines, and in particular relates to a muffler structure on a gasoline engine. Background technique [0002] The muffler is the exhaust device of the vertical axis general-purpose gasoline engine, and its main function is to discharge the exhaust gas of the gasoline engine. At present, the vertical axis gasoline engine mufflers commonly used in the market are all expansion structures, which are generally composed of a left shell, a right shell, a left partition and a right partition, wherein the left and right shells are fixed into a whole by buckles. The left and right partitions are arranged inside the left and right housings, and the parts of the left and right partitions overlap, so that three chambers are formed inside the housing, that is, the first chamber is formed between the left housing and the left partition , the second chamber is formed between the right housing and the right part...

AI Technical Summary

Problems solved by technology

The size of the small hole of the muffler is unreasonable, the number of the first small hole is small, the contact friction surface between the noise and the small hole neck wall is small, the efficiency of converting noise energy into heat energy is small, the noise energy consumption is small, the noise attenuation is small, and the high frequency noise is reduced. weak effect

The diameter of the second small hole is slightly smaller, and the total area is smaller. When the airflow passes through the second small hole, the airflow velocity is slightly higher, and the airflow regeneration noise is louder.

[0006] 4. The length of the muffler exhaust pipe is short

The length of the exhaust pipe of the original muffler is relatively short, only 36mm, which is also one of the reasons for the loud noise of the muffler

In addition, the length of the exhaust pipe is short, and the ability to reduce the noise in the middle and low frequency parts of the noise is weak

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