Spark arresting muffler

Abstract

The invention discloses a spark arresting muffler. At least one gas inlet is formed in one side of a shell, and at least one exhaust port is formed in the other side of the shell, wherein a partition plate is arranged in the shell, and is divided into a first partition plate and a second partition plate; the first partition plate partitions a first cavity and a second cavity; the second partition plate partitions the second cavity and a third cavity; a first muffling pipe is arranged on the first partition plate; a second muffling pipe is arranged on the second partition plate; an inlet pipe of the first muffling pipe is connected with the first cavity, and an outlet pipe of the first muffling pipe is connected with the second cavity; an inlet pipe of the second muffling pipe is connected with the second cavity, and an outlet pipe of the muffling pipe is connected with the third cavity; the gas inlet is connected with the first cavity; the exhaust port is connected with the third cavity; a spark arrestor is arranged at the exhaust port. According to the spark arresting muffler, sound can be well reflected and interacted to achieve a good muffling effect in a transmission process; the spark arrestor is arranged at the exhaust port, so that gas can be safely discharged.

Description

Technical field [0001] The invention relates to a muffler, in particular to an exhaust muffler for a diesel engine of an excavator. Background technique [0002] The exhaust muffler of the existing excavator diesel engine is a noise reduction device installed on the air flow channel of aerodynamic equipment or in the intake and exhaust systems. The muffler can block the propagation of sound waves and allow airflow to pass through, and is an effective tool for noise control. Existing resistant muffler, through the sudden change of the pipe section or bypassing the resonance cavity, causes the impedance change in the sound propagation process to produce the reflection and interference of sound energy, thereby reducing the sound energy radiated from the muffler to achieve elimination For acoustic purposes, the muffling effect is limited. Summary of the invention [0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provid...

AI Technical Summary

Problems solved by technology

The existing resistant muffler, through the sudden change of the pipe section or the side-connected resonant cavity, etc., causes the change of impedance during the sound propagation process to generate reflection and interference of sound energy, thereby reducing the sound energy radiated from the muffler to achieve muffler. Acoustic purpose, limited noise reduction effect

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