Muffler and construction vehicle

Abstract

The invention discloses a muffler and an engineering vehicle, relates to the field of engineering machinery and is used for optimizing the structure of the muffler. The muffler includes a shell assembly, an intake pipe and an exhaust pipe; the inner chamber of the shell assembly is divided into a Helmholtz resonance chamber, a first cavity, a second cavity and a third cavity; the intake The air pipe communicates with the first cavity, and the exhaust pipe communicates with the third cavity; the Helmholtz resonance cavity is used to eliminate exhaust noise that matches the engine frequency of the engineering vehicle. The muffler provided by the above technical solution adds a Helmholtz resonant cavity, which can eliminate specific frequency noise in a targeted manner. Here, the Helmholtz resonant cavity is used to eliminate the fundamental frequency noise of the engine exhaust noise, so that the muffler can Matched with the engine, it can eliminate the specific fundamental frequency and double frequency noise of the engine exhaust, and fully exert the noise reduction performance of the muffler.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a muffler and an engineering vehicle. Background technique [0002] With the continuous improvement of national laws and regulations on vibration and noise requirements, the vibration and noise reduction of engineering vehicles has become more and more important. The vibration and noise level of engineering vehicles has become an important indicator of product competitiveness and brand influence, directly affecting product quality. Survival of the fittest. As one of the main vibration sources of engineering vehicles, the vibration of the engine is transmitted to the muffler, causing damage to the structure of the muffler and radiating noise from the surface of the muffler; as one of the main noise sources of engineering vehicles, the exhaust noise of the engine affects the work of engineering vehicles The most common way to reduce the exhaust noise is to use a muffler. How ...

AI Technical Summary

Problems solved by technology

[0006] The inventors found that there are at least the following problems in the prior art: At present, most of the same type of engineering vehicles use mufflers with the same structure, so that the muffler effect is not good

Images