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Silencer, engine and engineering mechanical device

A muffler and muffler cavity technology, applied in mechanical equipment, machines/engines, engine components, etc., can solve the problems of difficult engine ignition fundamental frequency and multiplier noise muffler, and achieve the effect of strengthening the muffler effect.

Active Publication Date: 2017-03-08
JIANGSU XCMG STATE KEY LAB TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned muffler is mainly effective for a certain wide-band noise of exhaust noise, but it is difficult to muffle the engine ignition fundamental frequency and double frequency noise in a targeted manner

Method used

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  • Silencer, engine and engineering mechanical device
  • Silencer, engine and engineering mechanical device
  • Silencer, engine and engineering mechanical device

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Embodiment Construction

[0032] The present invention will be described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless specifically stated otherwise. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features which are considered to be preferred or advantageous.

[0033] Terms such as "first" and "second" appearing in the present invention are only for convenience of description, to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0034] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "horizontal", "longitudinal" etc. are based on those shown in the accompanying drawings. Orientation or positional rel...

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Abstract

The invention relates to a silencer, an engine and an engineering mechanical device. The silencer comprises a shell, an air inlet pipe and an air outlet pipe. The air inlet pipe and the air outlet pipe are arranged on the shell. The shell is internally provided with a plurality of communicating silencing cavities. Each silencing cavity comprises a plurality of main silencing cavities, wherein at least one main silencing cavity is provided with at least two sub-cavities communicating in a serial connection manner, at least two sub-cavities include the first sub-cavity located in the downstream part of the air inlet direction and the second sub-cavity located in the upstream part of the air inlet direction, and the first sub-cavity only communicates with the second sub-cavity. The first sub-cavity is divided into a plurality of cavities isolated from one another in an airtight manner. Each cavity communicates with the air inlet pipe through the second sub-cavity. The air outlet pipe communicates with the second sub-cavity. According to the silencer, the cavities isolated from one another in the airtight manner can be used for eliminating the peak value of noise under multiple specific frequencies at the same time, and accordingly noise under the specific frequencies can be eliminated.

Description

technical field [0001] The invention relates to the technical field of construction machinery equipment, in particular to a muffler, an engine and construction machinery equipment. Background technique [0002] The engine is the main noise source of construction machinery. The noise is composed of exhaust noise and surface radiation noise. The most common measure to reduce exhaust noise is to use an exhaust muffler. [0003] At present, resistance mufflers or impedance compound mufflers are mostly used in construction machinery. The above-mentioned muffler is mainly effective for a certain wide-band noise of the exhaust noise, but it is difficult to muffle the engine ignition fundamental frequency and double frequency noise in a targeted manner. Therefore, how to improve the design of the internal structure of the muffler so that it can reduce the noise of a specific frequency band in a targeted manner is a technical problem to be solved urgently by those skilled in the art...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N13/00F01N1/02
CPCF01N1/02F01N13/007
Inventor 倪翔宇高磊磊苏俊收
Owner JIANGSU XCMG STATE KEY LAB TECH CO LTD
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