CN201723506U - Silencer for low or medium pressure centrifugal fan - Google Patents
Silencer for low or medium pressure centrifugal fan Download PDFInfo
- Publication number
- CN201723506U CN201723506U CN201020225270XU CN201020225270U CN201723506U CN 201723506 U CN201723506 U CN 201723506U CN 201020225270X U CN201020225270X U CN 201020225270XU CN 201020225270 U CN201020225270 U CN 201020225270U CN 201723506 U CN201723506 U CN 201723506U
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- silencing
- sheets
- sheet
- anechoic
- silencer
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Abstract
The utility model relates to a silencer for a low or medium pressure centrifugal fan, which is mainly applied to high-pressure centrifugal fans for reducing the air power noise generated by an air inlet and an air outlet. The silencer comprises a shell body which is of a hollow structure; the inner wall of the shell body is connected with two first silencing sheets and two second silencing sheets; the two first silencing sheets are positioned up and down, so are the two second silencing sheets; both the front and rear ends of each first silencing sheet and each second silencing sheet are inserted into the inner wall of the shell body; the two second silencing sheets are arranged between the two first silencing sheets; one end of each first silencing sheet and each second silencing sheet is arc-shaped; the second silencing sheet is thicker than the first silencing sheet; and both the left and right ends of the shell body are connected with a transient body respectively. The silencer has the advantages of simple structure, god silencing effect and lower pressure loss.
Description
Technical field:
The utility model relates to a kind of silencing apparatus, and particularly a kind of mesolow centrifugal blower silencing apparatus is used for reducing industry and the mesolow centrifugal blower of civil building and the air power noise of boiler blower.
Background technique:
Silencing apparatus is to stop sound transmission and a kind of device of allowing air communication to cross, is the important measures of eliminating air power noise.Silencing apparatus is mounted on the air-flow path of aerodynamic force equipment (as blower, air compressor) or the device of the reduction noise in the inlet and exhaust system.Silencing apparatus can stop the propagation of sound wave, allows the air communication mistake, is the effective tool of control noise.At present, have only the anechoic sheet of same thickness in the centrifugal blower silencing apparatus, sound deadening capacity is very low, can not play good noise elimination effect, causes very big influence to working environment.
Summary of the invention:
The purpose of this utility model is in order to overcome above deficiency, and a kind of simple in structure, noise elimination is effective, the pressure loss is little mesolow centrifugal blower silencing apparatus is provided.
The purpose of this utility model is achieved through the following technical solutions: a kind of mesolow centrifugal blower silencing apparatus, comprise housing, housing is a hollow-core construction, be connected with two first anechoic sheets of placing up and down and two second anechoic sheets of placing up and down on the inner walls, the rear and front end of each first anechoic sheet and each second anechoic sheet all is embedded in the inwall of housing, two second anechoic sheets are arranged between two first anechoic sheets, one end of each first anechoic sheet and each second anechoic sheet is circular arc, the thickness of second anechoic sheet is thicker than the thickness of first anechoic sheet, and the two ends, the left and right sides of housing all are connected with the transition body.
The utility model compared with prior art has the following advantages:
The utility model utilizes acoustic resistance to eliminate the noise, in order to strengthen wide band sound absorption, and the anechoic sheet of built-in two kinds of different-thickness, and the thin and thick anechoic sheet is staggered, and it is effective to eliminate the noise like this.
Description of drawings:
Fig. 1 is the sectional view of structural representation of the present utility model;
Fig. 2 is the structural representation of A-A among Fig. 1;
Number in the figure: 1-housing, 2-first anechoic sheet, 3-second anechoic sheet, 4-transition body.
Embodiment:
In order to deepen understanding of the present utility model, the utility model is described in further detail below in conjunction with embodiment and accompanying drawing, and this embodiment only is used to explain the utility model, does not constitute the qualification to the utility model protection domain.
Show a kind of mode of execution of the utility model mesolow centrifugal blower silencing apparatus as Fig. 1 and Fig. 2, comprise housing 1, housing 1 is a sound-absorbing material, housing 1 is tetragonal body or cylindrical body, housing 1 is a hollow-core construction, be connected with two first anechoic sheets of placing up and down 2 and two second anechoic sheets of placing up and down 3 on housing 1 inwall, the rear and front end of each first anechoic sheet 2 and each second anechoic sheet 3 all is embedded in the inwall of housing 1, two second anechoic sheets 3 are arranged between two first anechoic sheets 2, in order to strengthen the wide band sound absorption, the thickness of second anechoic sheet 3 is thicker than the thickness of first anechoic sheet 2, one end of each first anechoic sheet 2 and each second anechoic sheet 3 is circular arc, one sound wave can be divided into the above sound wave of twice when running into the circular arc end face, reduced the frequency of original sound wave, make that sound wave energy is better absorbed, the two ends, the left and right sides of housing 1 all are connected with transition body 4.The sound wave air-flow comes and goes vibration in the aperture of microperforated panel 2, carry out noise reduction.
The utility model is mainly used in the high pressure centrifugal ventilator of various series, is used for reducing into and out of air power noises such as air ports.The utility model acoustical behavior is good, and aerodynamic quality is good; Rational in infrastructure, be convenient to install.The utility model has guaranteed to have enough sound deadening capacities in the broad frequency band scope, excites the shell wall vibration to produce radiation sound for reducing air-flow, also can on shell 1 stiffening rib be set.The utility model utilizes acoustic resistance to eliminate the noise, in order to strengthen wide band sound absorption, and the anechoic sheet of built-in two kinds of different-thickness, and the thin and thick anechoic sheet is staggered, and it is effective to eliminate the noise like this, sound deadening capacity Δ R 〉=20-25dB (A).
Claims (3)
1. mesolow centrifugal blower silencing apparatus, comprise housing (1), described housing (1) is a hollow-core construction, it is characterized in that: be connected with two first anechoic sheets of placing up and down (2) and two second anechoic sheets of placing up and down (3) on described housing (1) inwall, the rear and front end of each described first anechoic sheet (2) and each described second anechoic sheet (3) all is embedded in the inwall of described housing (1), two described second anechoic sheets (3) are arranged between two described first anechoic sheets (2), the thickness of described second anechoic sheet (3) is thicker than the thickness of described first anechoic sheet (1), and the two ends, the left and right sides of described housing (1) all are connected with transition body (4).
2. according to the described mesolow centrifugal blower of claim 1 silencing apparatus, it is characterized in that: an end of each described first anechoic sheet (2) and each described second anechoic sheet (3) is circular arc.
3. according to claim 1 or 2 described mesolow centrifugal blower silencing apparatuss, it is characterized in that: the thickness of described second anechoic sheet is thicker than the thickness of described first anechoic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020225270XU CN201723506U (en) | 2010-06-13 | 2010-06-13 | Silencer for low or medium pressure centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020225270XU CN201723506U (en) | 2010-06-13 | 2010-06-13 | Silencer for low or medium pressure centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201723506U true CN201723506U (en) | 2011-01-26 |
Family
ID=43491828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020225270XU Expired - Fee Related CN201723506U (en) | 2010-06-13 | 2010-06-13 | Silencer for low or medium pressure centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201723506U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481556A (en) * | 2016-12-07 | 2017-03-08 | 嘉兴东唐汽车科技有限公司 | A kind of vavuum pump |
-
2010
- 2010-06-13 CN CN201020225270XU patent/CN201723506U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481556A (en) * | 2016-12-07 | 2017-03-08 | 嘉兴东唐汽车科技有限公司 | A kind of vavuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20110613 |