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Fan volute with noise reduction device and assembly method thereof

An assembly method and noise reduction technology, which is applied to components, mechanical equipment, machines/engines, etc. of pumping devices used for elastic fluids, can solve the problems of high fan manufacturing costs, affecting sound absorption effects, and dusty impurities. Achieve the effect of easy cleaning and replacement, excellent noise reduction effect

Active Publication Date: 2019-06-04
上海应达风机股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has the following defects: due to the large number of noise reduction equipment, the manufacturing cost of the fan becomes higher, and the sound-absorbing layer will accumulate more dust and impurities on its surface after long-term use, which will affect its sound-absorbing effect

Method used

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  • Fan volute with noise reduction device and assembly method thereof
  • Fan volute with noise reduction device and assembly method thereof
  • Fan volute with noise reduction device and assembly method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] refer to figure 1 , figure 2 , image 3 , is a fan volute with a noise reduction device disclosed in the present invention, including a casing 1, and the casing 1 includes two sidewalls 11 parallel to each other and an annular ring that is arranged between the sidewalls 11 and extends along the edge of the sidewalls 11. Wall 12, the annular wall 12 is fixedly welded on one of the side walls 11, the other side wall 11 is bolted to the end surface of the free end of the annular wall 12, and a sealing ring 5 is sandwiched between the two, and the sealing ring 5 is on the side The seam between the wall 11 and the annular wall 12 forms a seal, which prevents air leakage from the edge of the casing 1 . The side wall 11 is provided with an air inlet 2, one side of the annular wall 12 is provided with an air outlet 3, and the housing 1 is provided with a noise reduction device 4, and the noise reduction device 4 includes a noise reduction layer 41 pasted on the inner wall of...

Embodiment 2

[0057] refer to Figure 4 , Figure 5 , a fan volute with a noise reduction device 4 disclosed in the present invention and its assembly method are basically the same as the first embodiment, the difference is that the structure of the noise reduction layer 41 is different, specifically: the noise reduction layer 41 is far away from the ring One side of the wall 12 is provided with a sound-absorbing wedge 45 .

[0058] The sound-absorbing principle of the sound-absorbing wedge 45 is: when the sound wave is incident from the tip of the sound-absorbing wedge 45, since the acoustic impedance of the material of the noise-reducing layer 41 and the acoustic impedance of the airflow can be better matched, the sound wave is transmitted into the noise-reducing layer 41 , and is absorbed efficiently. The structure of the noise reduction layer 41 can also increase the sound absorption effect of the noise reduction layer 41 and reduce the noise emitted by the fan.

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Abstract

The invention provides a fan volute with a noise reduction device and an assembly method thereof, relates to the technical field of fan structures, and aims at solving the problem that the noise absorbing effect of the noise reduction device is influenced due to more dust impurities accumulated on the surface of the noise reduction device after the noise reduction device in an existing fan is usedfor a long term. The fan volute structurally comprises a housing, the housing comprises two side walls which are mutually parallel and an annular wall which is arranged between the side walls and extends along the edge of the side wall, the housing is internally provided with the noise reduction device, the noise reduction device comprises a noise reduction layer which is arranged tightly closedto a ring-shaped wall and a plurality of blocking rods which are arranged perpendicular to the side wall, the baffle rods are arranged at intervals in the extension direction of the ring-shaped wall,the housing is divided into two parts in the direction parallel to the side wall, and the two parts are detachably connected. The assembly method of the fan volute comprises the steps that the ring-shaped wall is glued, the noise reduction layer is bonded, an inner component is installed, a sealing ring is bonded, and the side wall and the ring-shaped wall are connected through bolts. The fan volute has the advantages that the noise reduction layer is conveniently replaced, and a better noise reduction effect can be maintained.

Description

technical field [0001] The invention relates to the technical field of fan structures, in particular to a fan volute with a noise reduction device and an assembly method thereof. Background technique [0002] The fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. The fan is mainly used in metallurgy, petrochemical, electric power, urban rail transit, textiles, ships and other national economic fields and various Ventilation of the place. However, the existing fan is noisy during operation, and the noise pollution seriously affects the life of the personnel on site. [0003] The invention with the publication number of CN107191391A discloses a noise-reducing fan, including a fan body, the fan body is composed of a fan casing arranged on the top of the fan body and a base arranged at the bottom of the fan body, the top of the fan casing is set There is an air outlet, and a filter scree...

Claims

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Application Information

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IPC IPC(8): F04D29/42F04D29/62F04D29/66
Inventor 应德池彭新华
Owner 上海应达风机股份有限公司
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