CN202646174U - Sound-proofing tapered diffusion core cylinder of mine axial flow fan - Google Patents
Sound-proofing tapered diffusion core cylinder of mine axial flow fan Download PDFInfo
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- CN202646174U CN202646174U CN 201220311002 CN201220311002U CN202646174U CN 202646174 U CN202646174 U CN 202646174U CN 201220311002 CN201220311002 CN 201220311002 CN 201220311002 U CN201220311002 U CN 201220311002U CN 202646174 U CN202646174 U CN 202646174U
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- core cylinder
- absorbing material
- noise
- proofing
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Abstract
The utility model belongs to the technical field of mine ventilating fans and particularly relates to a sound-proofing tapered diffusion core cylinder of a mine axial flow fan. A shell of the tapered core cylinder adopts porous steel plates; a fiberglass mesh fabric layer is adhered to the inner side of each porous steel plate; the inner sides of the round steel plates at two end faces of the core cylinder are adhered with one sound-absorbing material; the interior of the core cylinder is filled with multiple layers of transverse arc-shaped bent clapboards which are made of steel plates; two sides of each clapboard are adhered with one sound-absorbing material; the arc-shaped bent clapboards divide the internal space of the core cylinder into multiple regions in which a plurality of reactive mufflers are arranged; and gaps among the reactive mufflers are filled with the sound-absorbing material. The sound-proofing tapered diffusion core cylinder of the mine axial flow fan is simple in structure, wide in applicable noise spectra and good in sound-proofing effect and can be simply and conveniently installed and manufactured.
Description
Technical field
The utility model belongs to the mine fan technical field, is specifically related to a kind of mining axial blower noise elimination taper diffusion core cylinder.
Background technique
Extensive use in the colliery of propeller fan, however ventilator is in the using process of colliery, because motor oscillating and gas unsteady flow can produce huge noise, more and more receives people's concern.The noise overwhelming majority that blower fan produces directly propagates into the space around the blower fan; through on-site measurement, noise usually reaches 110dB, even higher; surpassed greatly national standard about labor protection and environmental protection, serious harm coal mine working personnel's physical and mental health.Therefore, the improvement of mine fan noise problem has become one of subject matter of environmental pollution and occupational hazards.
At present, domestic main fan for mines and booster use propeller fan mostly, and for axial fan, diffusion barrel is the essential parts of axial-flow blower.The outlet velocity of axial-flow blower is large, and its outlet dynamic pressure is just large, accounts for more than 30% of total head, for the large and lower propeller fan of pressure of some flow, and its outlet kinetic energy even account for about 50% of blower press.Therefore must diffusion barrel be set in the back of draught fan impeller wheel hub, enlarge gradually cross section of fluid channel long-pending, reduce the airspeed in outlet port, in order to the recovery section dynamic pressure, thus the operational efficiency of raising axial-flow blower.
Some Domestic blower fan manufacturing enterprise has taked some improvement methods for the large problem of fan noise, as silencing pot is installed in the blower fan air outlet, perhaps the diffusing cone cylinder is added sound-absorbing material.Add silencing pot before and after the blower fan so that blower fan volume and runner increase; The diffusing cone cylinder adds sound-absorbing material, and certain noise elimination function is arranged, and its general configuration is: profile is designed to the conical hollow steel cylinder, and outer wall attaches sound-absorbing material (super glass wool etc.), wraps up at sound-absorbing material external application one deck stephanoporate steel plate.This method has certain control effect to noise, but exist very large defective: the division center of (1) this noise elimination core cylinder is one deck sound-absorbing material that covers tapered core cylinder outside, noise only depends on this to partially absorb, and sound absorption structure is too simple, and acoustically effective is not obvious.(2) the sound absorption frequency range is narrow.Around the diffusion core cylinder, except main aerodynamic noise (rotational noise and eddy current crack), also comprise the mechanical noise of contiguous motor operation generation etc., the frequency range of these noises is wide, existing Middle and low frequency noise, high-frequency noise is also arranged, and this type of cone cylinder sound absorption frequency range of eliminating the noise is narrow, can't the multi-frequency range noise that fan operation produces effectively be absorbed.Therefore, invent a kind of broadband noise muffler body for axial-flow blower diffusion core cylinder, significant to reducing the axial-flow blower noise.
Summary of the invention
The purpose of this utility model is for the defects that exists in the prior art, according to present China mining axial blower characteristics, do not affecting under the prerequisite of axial-flow blower diffusion barrel tapered core cylinder to distinguished and admirable regulating action, a kind of noise elimination taper diffusion core cylinder of better effects if is being provided.
The purpose of this utility model realizes by the following technical solutions: this mining axial blower noise elimination taper diffusion core cylinder, be characterized in: the shell of tapered core cylinder adopts stephanoporate steel plate, the stephanoporate steel plate inboard is pasted with the layer of glass screen cloth, and the circular steel plate inboard of core cylinder both ends of the surface also is pasted with one deck sound-absorbing material; Several layers of horizontal arc bend dividing plate are installed in core cylinder inside, and arc bend dividing plate adopts steel plate to make, and its two sides all is pasted with sound-absorbing material; In several zones that arc bend dividing plate is divided into core cylinder inner space, lay several reactive mufflers, the space between the reactive muffler adopts sound-absorbing material to fill.
Described sound-absorbing material is that ultra-fine fibre glass is cotton.
Noise-cancelling theory of the present utility model is that resistance is comprehensively eliminated the noise, its detailed process is: the noise that fan operation produces enters core cylinder inside by the aperture on stephanoporate steel plate surface, in the sound-absorbing material propagation process that section fills within it, a part of noise acoustic energy is consumed absorption; Fail absorbed noise transmission to arc bend baffle surface, part noise is absorbed by the baffle surface sound-absorbing material, a part is reflected, because the special construction of arc bend dividing plate, noise how many reflections of process and absorption in by the zone of separator lined, acoustic energy is consumed, so that reducing noise.Sound-absorbing material is better to the assimilation effect of high-frequency noises, and several reactive mufflers that the Middle and low frequency noise that fan operation produces then can be arranged in the zone absorb.
Mining axial blower taper diffusion core cylinder silencer of the present utility model is simple in structure, and applicable noise spectrum scope is wide, and soundproof effect is good, installs simple for production.
Description of drawings
Fig. 1 is the utility model embodiment's sectional view.
Fig. 2 is this practical embodiment's noise-cancelling theory schematic diagram.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Referring to Fig. 1, the utility model noise elimination tapered core cylinder is installed in the blower fan diffusion barrel.Noise elimination tapered core cylinder as shown in Figure 1, its shell is one deck stephanoporate steel plate 1, the inside of stephanoporate steel plate 1 attaches layer of glass screen cloth 2.Shown in Figure 1 have five layers of arc bend dividing plate 3 laterally to be installed in taper diffusion core cylinder inside, core cylinder internal separation is spread in taper become several zones, lay several reactive mufflers 5 at each intra-zone according to the noise reduction needs, fill with sound-absorbing material 4 in the space that reactive muffler is 5.The two sides of arc bend dividing plate 3 all is pasted with sound-absorbing material, equally also attaches one deck sound-absorbing material 6 on the circular steel plate at core cylinder two ends.Sound-absorbing material in the present embodiment adopts ultra-fine fibre glass cotton.
Referring to Fig. 2, it is inner that noise enters taper diffusion core cylinder by the aperture on the stephanoporate steel plate 1, and glass fiber mesh 2 is outside at taper diffusion core cylinder with obstructs such as the solid particles in the air-flow, and noise is in the propagation process of sound-absorbing material 4, and a part of noise is absorbed; Unabsorbed noise transmission is to the A face of arc bend dividing plate 3, the sound-absorbing material of arc bend baffle surface absorbs a part of noise, another part is reflexed to the B face of arc bend dividing plate 3 by it, reflex in the process of B face at noise, the path of propagation of sound has again the absorption of sound-absorbing material 4 and reactive muffler 5.Because the special construction of arc bend dividing plate, so that the noise sound wave repeatedly absorbed and reflect in limited space, thus continuous sound energy consumption reduction noise.Sound-absorbing material 6 on the steel plate of core cylinder bottom can absorb the noise that propagates into core cylinder bottom.
Claims (2)
1. the core cylinder is spread in a mining axial blower noise elimination taper, and it is characterized in that: the shell of tapered core cylinder adopts stephanoporate steel plate, and the stephanoporate steel plate inboard is pasted with the layer of glass screen cloth, and the circular steel plate inboard of core cylinder both ends of the surface also is pasted with one deck sound-absorbing material; Several layers of horizontal arc bend dividing plate are installed in core cylinder inside, and dividing plate adopts steel plate to make, and its two sides all is pasted with sound-absorbing material; In several zones that arc bend dividing plate is divided into core cylinder inner space, lay several reactive mufflers, the space between the reactive muffler adopts sound-absorbing material to fill.
2. the core cylinder is spread in mining axial blower noise elimination taper according to claim 1, it is characterized in that: described sound-absorbing material is that ultra-fine fibre glass is cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220311002 CN202646174U (en) | 2012-06-29 | 2012-06-29 | Sound-proofing tapered diffusion core cylinder of mine axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220311002 CN202646174U (en) | 2012-06-29 | 2012-06-29 | Sound-proofing tapered diffusion core cylinder of mine axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646174U true CN202646174U (en) | 2013-01-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220311002 Expired - Fee Related CN202646174U (en) | 2012-06-29 | 2012-06-29 | Sound-proofing tapered diffusion core cylinder of mine axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646174U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821776A (en) * | 2014-03-10 | 2014-05-28 | 南通大通宝富风机有限公司 | Diffusion taper pipe silencer for blower |
| RU2789987C1 (en) * | 2022-01-31 | 2023-02-14 | Владимир Викторович Коваленко | Gas flow noise muffler (gfnm) |
-
2012
- 2012-06-29 CN CN 201220311002 patent/CN202646174U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821776A (en) * | 2014-03-10 | 2014-05-28 | 南通大通宝富风机有限公司 | Diffusion taper pipe silencer for blower |
| RU2789987C1 (en) * | 2022-01-31 | 2023-02-14 | Владимир Викторович Коваленко | Gas flow noise muffler (gfnm) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20150629 |
|
| EXPY | Termination of patent right or utility model |