CN203822713U - Diffusion silencer of mine ventilating fan - Google Patents
Diffusion silencer of mine ventilating fan Download PDFInfo
- Publication number
- CN203822713U CN203822713U CN201420111945.6U CN201420111945U CN203822713U CN 203822713 U CN203822713 U CN 203822713U CN 201420111945 U CN201420111945 U CN 201420111945U CN 203822713 U CN203822713 U CN 203822713U
- Authority
- CN
- China
- Prior art keywords
- noise elimination
- diffusion
- plate
- silencer
- frequency noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a diffusion silencer of a mine ventilating fan. The diffusion silencer of the mine ventilating fan comprises a diffusion plate, a low-frequency noise elimination layer and a high-frequency noise elimination layer, wherein the low-frequency noise elimination layer and the high-frequency noise elimination layer are arranged in the diffusion plate; the low-frequency noise elimination layer is arranged below the high-frequency noise elimination layer. According to the diffusion silencer, conical columnar diffusion noise elimination is adopted, and the diffusion plate is internally provided with the low-frequency noise elimination layer and the high-frequency noise elimination layer, so that noises at the air outlet of a diffuser of the ventilating fan can be effectively reduced, the noise elimination frequency band is wide, and high-frequency and low-frequency noises can be effectively reduced. The diffusion silencer is simple in structure and convenient in operation, and can be used for better solving the problems of large wind resistance and high fan outlet dynamic pressure loss of an existing diffusion silencer of the ventilating fan.
Description
Technical field
The utility model belongs to pit gear technical field, relates in particular to a kind of mine fan diffusion silencer.
Background technique
At present, in pit mining process, oneself reaches very serious degree the noise pollution of electromechanical equipment, large fan particularly, because its power is large, rotating speed is high, in running, can produce strong air power noise and mechanical noise, environment is caused to severe contamination, affected people's normal work and life.Its noise figure of domestic large fan is many more than 110dB (A), therefore in actual production process, except selecting low noise equipment, must control the delivering path of noise, be noise abatement, just can reach national relevant emission standards, reduce the pollution to environment.
In recent years, air-blower noise is administered and carried out a large amount of research, conventional is to fix a silencer at diffuser outlet annex, offsets deacration Aerodynamic Noise of A and plays a role. conventional silencing apparatus basic structure form has at present: straight-through structure, slice structure, cellular structure.But, conventionally after propeller fan outlet configuration silencing apparatus, the Efficiency Decreasing that can cause blower fan. therefore, the structure that need to research and develop a kind of silencing apparatus reduces the dynamic pressure loss of fan outlet, guarantee that colliery outlet noise silencer, except having enough noise elimination effects, also has good aerodynamic quality.
Model utility content
Existing ventilator diffusion baffler windage is large in order to solve for the utility model, large problem is lost in fan outlet dynamic pressure provides a kind of mine fan simple in structure, easy to install, that increase work efficiency to spread silencer.
The technological scheme that the utility model is taked for the technical problem existing in solution known technology is:
The utility model embodiment's mine fan diffusion silencer, this mine fan diffusion silencer comprises diffuser plate, low frequency silencing plate, high frequency silencing plate;
Low frequency silencing plate and high frequency silencing plate are arranged on diffuser plate inside, low frequency silencing plate be arranged on high frequency silencing plate below.
The utility model can also adopt following technical measures:
Further, diffuser plate is conical cylinder, and angle of flare becomes 10 ° to be circular cone post.
Further, adopt Type B perforated plate to surround diffuser plate.
Further, adopt the low frequency silencing plate of thickening type 250mm specification anechoic sheet.
Further, adopt the high frequency silencing plate of 150mm specification anechoic sheet.
Advantage and the good effect that the utlity model has are: because the utility model adopts circular cone column type diffusion noise reduction, low frequency silencing plate and high frequency silencing plate are housed in diffuser plate, can effectively reduce ventilator diffuser exhaust outlet noise, anechoic frequency bandwidth, effectively reduces the just noise of frequency.Of the present utility model simple in structure, easy to operate, preferably resolve that existing ventilator diffusion baffler windage is large, large problem is lost in fan outlet dynamic pressure.
Accompanying drawing explanation
Fig. 1 is the structural representation of the mine fan diffusion silencer that provides of the utility model embodiment;
In figure: 1, diffuser plate; 2, low frequency silencing plate; 3, high frequency silencing plate.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows.There is not the innovation of software or method in the utility model.
Refer to Fig. 1:
As shown in Figure 1, the utility model embodiment's mine fan diffusion silencer is mainly comprised of diffuser plate 1, low frequency silencing plate 2, high frequency silencing plate 3;
Low frequency silencing plate 2 and high frequency silencing plate 3 are arranged on diffuser plate 1 inside, low frequency silencing plate 2 be arranged on high frequency silencing plate 3 below.
Diffuser plate 1 is conical cylinder, diffuser plate stands upside down and is arranged on the exhaust outlet of mine fan diffuser, in order to guarantee that expansion gradually and the kinetic energy of flow area reclaims to greatest extent, according to repeatedly measuring and calculating, angle of flare becomes 10 ° to be circular cone post, diffuser plate 1 use Type B perforated plate surrounds, and has advantages of that intensity is high, good decorative property, acoustically effective is good and waterproof fireproofing; Diffuser plate inside is provided with low frequency silencing plate and high frequency silencing plate.
Low frequency silencing plate 2 is positioned at diffuser plate 1 inside, be positioned at high frequency silencing plate 3 below, adopt thickening type 250mm specification anechoic sheet to form, material is waterproof centrifugally glass-wool, and low frequency absorption coefficient, more than 0.3, can effectively be widened sound sucting band, promote acoustically effective, meet the demand of blower fan low frequency absorption.
High frequency silencing plate 3 is positioned at diffuser plate 1 inside, be positioned at low frequency silencing plate 2 above, adopt 150mm specification anechoic sheet to form, material is waterproof centrifugally glass-wool, and high frequency acoustic absorptivity, more than 0.8, can effectively be widened sound sucting band, promote acoustically effective, meet the high demand of sound absorption again and again of blower fan.
In order to check dispersion type noise deadener to reduce the situation of ventilator outlet noise figure, utilize sound level meter to measure: before administering, noise figure is 106dB (A); After administering, noise figure is 83dB (A); Overall sound deadening capacity is 22dB (A).
Working principle of the present utility model: have higher dynamic pressure, while particularly adopting draw-out type working method, air-flow is directly thrown into atmosphere, and its dynamic pressure (kinetic energy) is lost in atmosphere, is unprofitable to ventilate.Theoretical according to coalmine ventilation, to take away when ventilator work total head is the negative pressure that produces of blower fan and flow shedding blower fan dynamic pressure sum, that is:
H=Hst+Hd；
In formula: H is ventilator work total head; Hst is the negative pressure that blower fan produces; Hd is dynamic pressure.
Wherein dynamic pressure can be expressed as:
In formula: Q is gas density; V is fan outlet gas flow rate.After ventilator housing outlet configuration diffuser, the flow velocity due to air-flow during by diffuser reduces gradually, and institute is less than the dynamic pressure at fan outlet place down to the dynamic pressure in outlet port.When dynamic pressure reduces, static pressure increases, but the quantity that dynamic pressure reduces is not equal to the quantity that static pressure increases, and wherein a part is for overcoming the flow losses of diffuser inside.If the static pressure of the former blower fan of static pressure ratio after installation diffuser has increased, illustrate that the efficiency of propeller fan has improved.
The silencing apparatus of colliery exhaust ventilation machine outlet should be dissipative muffler, and it is to utilize the sound-absorbing porous material being laid in air-flow path to eliminate the noise.Meanwhile, in order further to reduce silencing apparatus resistance, according to blower fan diffusion theory, acoustic wave filter structure is defined as diffused.
The above is only to preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, every foundation technical spirit of the present utility model is to any simple modification made for any of the above embodiments, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.
Claims (5)
1. a mine fan diffusion silencer, is characterized in that, this mine fan diffusion silencer comprises diffuser plate, low frequency silencing plate, high frequency silencing plate;
Low frequency silencing plate and high frequency silencing plate are arranged on diffuser plate inside, low frequency silencing plate be arranged on high frequency silencing plate below.
2. mine fan diffusion silencer as claimed in claim 1, is characterized in that, diffuser plate is conical cylinder, and angle of flare becomes 10 ° to be circular cone post.
3. mine fan diffusion silencer as claimed in claim 1, is characterized in that, adopts Type B perforated plate to surround diffuser plate.
4. mine fan diffusion silencer as claimed in claim 1, is characterized in that, adopts the low frequency silencing plate of thickening type 250mm specification anechoic sheet.
5. mine fan diffusion silencer as claimed in claim 1, is characterized in that, adopts the high frequency silencing plate of 150mm specification anechoic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111945.6U CN203822713U (en) | 2014-03-12 | 2014-03-12 | Diffusion silencer of mine ventilating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420111945.6U CN203822713U (en) | 2014-03-12 | 2014-03-12 | Diffusion silencer of mine ventilating fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203822713U true CN203822713U (en) | 2014-09-10 |
Family
ID=51478222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420111945.6U Expired - Fee Related CN203822713U (en) | 2014-03-12 | 2014-03-12 | Diffusion silencer of mine ventilating fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203822713U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966008A (en) * | 2016-10-20 | 2018-04-27 | 东莞市南月模具压铸有限公司 | Hydrophone is blown in a kind of aluminum noise reduction |
-
2014
- 2014-03-12 CN CN201420111945.6U patent/CN203822713U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966008A (en) * | 2016-10-20 | 2018-04-27 | 东莞市南月模具压铸有限公司 | Hydrophone is blown in a kind of aluminum noise reduction |
| CN107966008B (en) * | 2016-10-20 | 2024-03-29 | 东莞市南月模具压铸有限公司 | Aluminum silencing water blower |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102607294B (en) | Cooling tower silencing structure | |
| CN203743083U (en) | Fan silencer used for dust remover | |
| CN203441795U (en) | Air exchanging and noise reducing device of offshore drilling platform | |
| CN103807995B (en) | A kind of combined array impedance muffler | |
| CN203441831U (en) | Power plant primary air fan inlet noise elimination device | |
| CN201199132Y (en) | Mechanical-draft cooling tower muffler | |
| CN203822713U (en) | Diffusion silencer of mine ventilating fan | |
| CN203962104U (en) | A kind of outlet pipe baffler | |
| CN204590290U (en) | A kind of roots blower machine room noise reduction compages | |
| CN208474122U (en) | The silencing means of Roots blower | |
| CN204371592U (en) | Natural gas compressor silencer and there is the natural gas compressor of this silencer | |
| CN204113452U (en) | High-power diesel generator set | |
| CN203394890U (en) | Composite chimney muffler | |
| CN111022373A (en) | Converter silencing air duct system and method for reducing low-frequency noise | |
| CN207064950U (en) | A kind of Novel muffler for exhaust outlet | |
| CN203716542U (en) | Diesel generating set machine room | |
| CN203978563U (en) | Straighttube-type baffler | |
| CN209444626U (en) | A kind of main fan noise eliminating silencer | |
| CN207879717U (en) | Metope exhaust fan composite muffler | |
| CN208185726U (en) | A kind of exhaust decompression silencing means | |
| CN206891220U (en) | A kind of large cooling column porting silencing apparatus | |
| CN202866938U (en) | Impedance combined type muffler | |
| CN207702017U (en) | A kind of ventilation shaft muffler | |
| CN213981281U (en) | Induced draft fan with spray tower and built-in silencer | |
| CN206723158U (en) | Blower fan silencer |
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: 20140910 Termination date: 20150312 |
|
| EXPY | Termination of patent right or utility model |