CN2342136Y - Silencer for fan - Google Patents
Silencer for fan Download PDFInfo
- Publication number
- CN2342136Y CN2342136Y CN 98211630 CN98211630U CN2342136Y CN 2342136 Y CN2342136 Y CN 2342136Y CN 98211630 CN98211630 CN 98211630 CN 98211630 U CN98211630 U CN 98211630U CN 2342136 Y CN2342136 Y CN 2342136Y
- Authority
- CN
- China
- Prior art keywords
- sound
- perforated plate
- absorbing material
- fan
- casing
- 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
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Abstract
The utility model relates to a silencing device for a fan, which is mainly suitable for a Roots blower with large negative pressure. The silencing device for a fan is composed of a casing and a core body; the external side of the casing is provided with an external casing which is composed of a shell, sound-absorbing materials, and a perforated plate. The sound-absorbing materials are clamped in the middle of the both-layer perforated plate; one end of the external casing is sphere-shaped; the middle and the other end are cylindrical; the periphery of the cylinder on the other end is provided with an air inlet hole, and an air inlet duct is arranged between the external casing and the casing. The utility model has advantages of good silencing effect, and the silencing device for a fan has better silencing effects particularly the fan with the larger negative pressure.
Description
The utility model relates to the control gear of fan noise, mainly is applicable to the roots blower that negative pressure is big.
The control of fan noise has micropunch plate muffler, straighttube-type dissipative muffler, and the sound absorption Kong Yi of micropunch plate muffler is stopped up by dust, makes sound absorption put fruit and reduces; The straighttube-type dissipative muffler only is applicable to the blower fan that negative pressure is little, for the big roots blower noise elimination weak effect of negative pressure, does not reach the noise reduction requirement.
The purpose of this utility model is: avoid the shortcoming of background technique, adopt the high composite sound absorbing body of sound absorption efficiency, and make noise enter blower fan silencing apparatus in the sound absorbent fully.
The utility model is made up of housing and core body, core body is contained in the center of housing one end, the cylindrical body that housing is made up of sound-absorbing material and perforated plate, sound-absorbing material is clipped between the two-layer perforated plate, two ends are connected and fixed with keel, and frame is arranged outside housing, and frame is made up of shell, sound-absorbing material and perforated plate, sound-absorbing material is clipped between the two-layer perforated plate and constitutes sound absorbent, and shell, sound-absorbing material, perforated plate are connected and fixed with keel.One end of frame is a spheroidal, and the centre and the other end are cylindrical shape, around cylinder end intake opening is arranged, and is air inlet duct between frame and the housing.
Advantage of the present utility model: the sound absorption efficiency height of sound absorbent, it is effective to eliminate the noise, and special in the big blower fan of negative pressure, the noise elimination effect improves more than 20 decibels (A) than background technique.
Fig. 1 is a structural representation of the present utility model
Fig. 2 is the A-A sectional view of Fig. 1
Frame is made up of shell 1, sound-absorbing material 2, perforated plate 3, frame is a cylindrical shape, one end is spherical, the other end is the veneer cylindrical body, does not have sound-absorbing material, and intake opening 7 is arranged around the veneer cylindrical body, the sound absorbent of being made up of sound-absorbing material 2 and perforated plate 3 is positioned at the inboard of shell 1, sound-absorbing material 2 is clipped between the two-layer perforated plate 3, is connected and fixed with keel 6, keel 10, keeps the 20-30 mm distance between shell 1 and the sound absorbent; The cylindrical body that housing 5 is made up of sound-absorbing material and perforated plate, sound-absorbing material is clipped between the two-layer perforated plate, two ends are fixing with keel 8, keel 11, on connection method hurdle, the outside of keel 89, housing is connected by keel 8 with frame one end, the other end is connected and fixed with four struts 12, is annular air inlet duct between housing and the frame; Core body 4 is fusiform long round body, and the inside is a sound-absorbing material, and the outside is a perforated plate, is contained in the center of housing 5 air intakes, is fixed on the housing with strut 13.The sound absorption bore dia of perforated plate is the 3-4 millimeter; Sound-absorbing material is selected moistureproof super glass wool for use; Keel are circular body, select material according to the size of institute's gas-distributing fan power, and high-power blower selects the metal keel, and the small-power blower fan can be selected wooden keel for use.
Claims (4)
1, a kind of blower fan silencing apparatus, form by housing and core body, it is characterized in that: there is frame the outside of housing (5), frame is made up of shell (1), sound-absorbing material (2) and perforated plate (3), sound-absorbing material is clipped between the two-layer perforated plate, and an end of frame is a spheroidal, and the centre and the other end are cylindrical shape, intake opening (7) is arranged on the cylinder of end, is air inlet duct between frame and the housing (5).
2, blower fan silencing apparatus according to claim 1, it is characterized in that: between sound absorbent of being made up of sound-absorbing material (2) and perforated plate (3) and the shell (1) the 20-30 mm distance is arranged, sound-absorbing material, perforated plate and shell are fixedly connected with keel (6), (10).
3, blower fan silencing apparatus according to claim 1 and 2 is characterized in that the sound absorption bore dia on the perforated plate is the 3-4 millimeter.
4, blower fan silencing apparatus according to claim 1 is characterized in that: housing (5) is made up of sound-absorbing material and perforated plate, and sound-absorbing material is clipped between the two-layer perforated plate, and two ends are connected and fixed with keel (8), (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98211630 CN2342136Y (en) | 1998-03-13 | 1998-03-13 | Silencer for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98211630 CN2342136Y (en) | 1998-03-13 | 1998-03-13 | Silencer for fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2342136Y true CN2342136Y (en) | 1999-10-06 |
Family
ID=33966225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98211630 Expired - Fee Related CN2342136Y (en) | 1998-03-13 | 1998-03-13 | Silencer for fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2342136Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1331158C (en) * | 2005-07-29 | 2007-08-08 | 清华大学 | Fell ball aspirator of ball bed high-temperature air cooled reactor |
| CN101137840B (en) * | 2005-03-07 | 2010-06-23 | 开利公司 | Compressor noise suppression |
| CN102927061A (en) * | 2012-11-15 | 2013-02-13 | 江苏中联风能机械有限公司 | Annular muffler device for large-sized air cooling fan |
| CN102927062A (en) * | 2012-11-15 | 2013-02-13 | 江苏中联风能机械有限公司 | Layout muffling device for large-sized air cooling fan |
| CN105864108A (en) * | 2015-01-22 | 2016-08-17 | 中国科学院声学研究所 | Silencer for draught fan air inlet |
-
1998
- 1998-03-13 CN CN 98211630 patent/CN2342136Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101137840B (en) * | 2005-03-07 | 2010-06-23 | 开利公司 | Compressor noise suppression |
| CN1331158C (en) * | 2005-07-29 | 2007-08-08 | 清华大学 | Fell ball aspirator of ball bed high-temperature air cooled reactor |
| CN102927061A (en) * | 2012-11-15 | 2013-02-13 | 江苏中联风能机械有限公司 | Annular muffler device for large-sized air cooling fan |
| CN102927062A (en) * | 2012-11-15 | 2013-02-13 | 江苏中联风能机械有限公司 | Layout muffling device for large-sized air cooling fan |
| CN105864108A (en) * | 2015-01-22 | 2016-08-17 | 中国科学院声学研究所 | Silencer for draught fan air inlet |
| CN105864108B (en) * | 2015-01-22 | 2018-08-07 | 中国科学院声学研究所 | A kind of air inlet silencer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |