CN208534857U - Axial flow blower noise-reducing structure - Google Patents

Abstract

The utility model relates to a kind of axial flow blower noise-reducing structures, including inner cylinder, outer cylinder, motor and impeller, the outer barrel is additionally provided with an orifice plate noise reduction layer, orifice plate noise reduction layer front opening edge opens setting and open edge is connect with outer cylinder end, it is opening between orifice plate noise reduction layer rear end and outer cylinder, orifice plate noise reduction layer is equipped with annular noise reduction corresponding with the blade of impeller is located at and is open；Silencing cotton layer is additionally provided on the outer tube inner wall, the gap for air circulation is equipped between silencing cotton layer and orifice plate noise reduction layer, silencing cotton layer is equipped with the silencing block of respective protrusions structure in the annular noise reduction opening of orifice plate noise reduction layer, and the axial middle part of silencing block is smooth concave inward structure and its surface is round circumferentially distributed annular dentalation；The structure design of the utility model is reasonable, by the way that orifice plate noise reduction layer and silencing cotton layer are arranged on outer cylinder, can reduce noise caused by axial flow blower work, improve task environmental quality.

Description

Axial flow blower noise-reducing structure

Technical field

The utility model relates to blower art field more particularly to a kind of axial flow blower noise-reducing structures.

Background technique

Currently, axial flow blower has that noise is big during the work time, noise pollution is caused to installation site, it is some Special occasions so that axial flow blower is individually installed using undesirable, needs to install additional to the more demanding of noise Noise elimination auxiliary products increase engineering cost in the case where occupying larger construction space.

Summary of the invention

In order to solve deficiency in the prior art, the purpose of this utility model is to provide a kind of axial flow blower noise reduction knots Structure, for reducing noise caused by axial flow blower work.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of axial flow blower noise-reducing structure, including inner cylinder, outer cylinder, motor and impeller, inner cylinder are arranged on the inside of outer cylinder, motor It is arranged on the inside of inner cylinder, the output end of motor and the impeller on front side of inner cylinder connect, it is characterised in that:

The outer barrel is additionally provided with an orifice plate noise reduction layer, and orifice plate noise reduction layer front opening edge opens setting and opening edge Edge is connect with outer cylinder end, is opening between orifice plate noise reduction layer rear end and outer cylinder, and orifice plate noise reduction layer is equipped with and is located at impeller The corresponding annular noise reduction opening of blade；

It is additionally provided with silencing cotton layer on the outer tube inner wall, is equipped between silencing cotton layer and orifice plate noise reduction layer and is used for air circulation Gap, silencing cotton layer in orifice plate noise reduction layer annular noise reduction opening be equipped with respective protrusions structure silencing block, silencing block Axial middle part is smooth concave inward structure and its surface is round circumferentially distributed annular dentalation.

The silencing block is located at annular noise reduction opening inner side.

It is additionally provided with silencing cotton layer on the outer drum outer wall, is enclosed with protective layer on the outside of silencing cotton layer.

The protective layer uses fire retardant nonwoven fabric.

The beneficial effects of the utility model are: it is reasonable in design, by the way that orifice plate noise reduction layer and noise reduction are arranged on outer cylinder Cotton layer can reduce noise caused by axial flow blower work, improve task environmental quality.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the structural schematic diagram of the utility model (half-sectional state).

Fig. 2 is the partial enlargement structural representation of " A " in Fig. 1.

In figure: 1 outer cylinder, 2 motors, 3 inner cylinders, 4 impellers, 5 blades, 6 orifice plates noise reduction layer, 7 annular noise reductions openings, noise reduction in 8 Cotton layer, 9 silencing blocks, 10 gaps, 11 outer silencing cotton layers, 12 protective layers.

Specific embodiment

The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by this Content disclosed by specification understands other advantages and effect of the utility model easily.

As shown in Figure 1, 2: a kind of axial flow blower noise-reducing structure, including inner cylinder 3, outer cylinder 1, motor 2 and impeller 4, inner cylinder 3 are set It sets in 1 inside of outer cylinder, is carried out between inner cylinder 3 and outer cylinder 1 by construction packages such as support plate, heat dissipation air inlet pipe, heat dissipation escape pipes Connection, the setting of motor 2 are connect in 3 inside of inner cylinder, the output end of motor 2 with the impeller 4 of 3 front side of inner cylinder, drive leaf by motor 2 Wheel 4 is rotated；

An orifice plate noise reduction layer 6 is additionally provided with inside the outer cylinder 1,6 front opening edge of orifice plate noise reduction layer opens setting and opens Mouthful edge is connect with 1 end of outer cylinder, is made the horn-like structure in air inlet side end of orifice plate noise reduction layer 6 and is connect with outer cylinder 1, can be with Reduce the windage of axial flow blower inlet side；It is opening between 6 rear end of orifice plate noise reduction layer and outer cylinder 1, for orifice plate noise reduction layer 6 and outside The discharge of air between cylinder 1；Orifice plate noise reduction layer 6 is equipped with annular noise reduction opening 7 corresponding with the blade 5 of impeller 4 is located at, annular Noise reduction opening 7 is for carrying out noise reduction to 5 edge of blade；

It is additionally provided with interior silencing cotton layer 8 on 1 inner wall of outer cylinder, is equipped with and is used between interior silencing cotton layer 8 and orifice plate noise reduction layer 6 The gap 10 of air circulation is used for the circulation of air by the gap 10, reduces windage, interior silencing cotton layer 8 is in orifice plate noise reduction layer 6 Annular noise reduction opening 7 at be equipped with the silencing block 9 of respective protrusions structure, silencing block 9 is located at annular 7 inside of noise reduction opening, noise reduction The axial middle part of block 9 is smooth concave inward structure and its surface is round circumferentially distributed annular dentalation, passes through concave inward structure It is used to increase the surface absorption area of silencing block 9 with annular dentalation, reaches preferable noise reduction effect.

By the way that orifice plate noise reduction layer 6 and interior silencing cotton layer 8 are arranged on outer cylinder, can reduce caused by axial flow blower work Noise improves task environmental quality.

Further, on the basis of above-mentioned axial flow blower noise-reducing structure, outer silencing cotton is additionally provided on 1 outer wall of outer cylinder Layer 11 is enclosed with protective layer 12 on the outside of outer silencing cotton layer 11, and protective layer 12 uses fire retardant nonwoven fabric, by outer silencing cotton layer 11 into One step improves noise reduction effect.

The foregoing is merely the preferred embodiments of the utility model, as long as realizing the utility model with essentially identical means Purpose technical solution, belong within the protection scope of the utility model.

Claims (4)

1. a kind of axial flow blower noise-reducing structure, including inner cylinder, outer cylinder, motor and impeller, inner cylinder is arranged on the inside of outer cylinder, and motor is set It sets on the inside of inner cylinder, the output end of motor and the impeller on front side of inner cylinder connect, it is characterised in that:

The outer barrel is additionally provided with an orifice plate noise reduction layer, orifice plate noise reduction layer front opening edge open setting and open edge with The connection of outer cylinder end, is opening between orifice plate noise reduction layer rear end and outer cylinder, and orifice plate noise reduction layer is equipped with and is located at the blade of impeller Corresponding annular noise reduction opening；

It is additionally provided with silencing cotton layer on the outer tube inner wall, is equipped between silencing cotton layer and orifice plate noise reduction layer between air circulation Gap, silencing cotton layer are equipped with the silencing block of respective protrusions structure, the axial direction of silencing block in the annular noise reduction opening of orifice plate noise reduction layer Middle part is smooth concave inward structure and its surface is round circumferentially distributed annular dentalation.

2. axial flow blower noise-reducing structure according to claim 1, it is characterised in that: the silencing block is located at annular noise reduction and opens On the inside of mouthful.

3. axial flow blower noise-reducing structure according to claim 1, it is characterised in that: be additionally provided with noise reduction on the outer drum outer wall Cotton layer, silencing cotton layer outside are enclosed with protective layer.

4. axial flow blower noise-reducing structure according to claim 3, it is characterised in that: the protective layer uses fire-retardant nonwoven Cloth.