CN202789547U - Combined silencer for fan - Google Patents
Combined silencer for fan Download PDFInfo
- Publication number
- CN202789547U CN202789547U CN201220463473.1U CN201220463473U CN202789547U CN 202789547 U CN202789547 U CN 202789547U CN 201220463473 U CN201220463473 U CN 201220463473U CN 202789547 U CN202789547 U CN 202789547U
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- foam body
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- urceolus
- inner core
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Abstract
The utility model discloses a combined silencer for a fan. The combined silencer for the fan is composed of an outer cylinder, an inner cylinder, a top cover and a base plate; an annular first empty cavity and a columnar second empty cavity are formed in the combined silencer for the fan; the inner cylinder is also provided with a plurality of through holes for communicating the two empty cavities; the first empty cavity is internally provided with a first annular sponge body and a second annular sponge body; the first sponge body is fit on the inner wall of the outer cylinder; the second sponge body is fit on the outer wall of the inner cylinder; and the density of the first sponge body is greater than the density of the second sponge body. The combined silencer for the fan provided by the utility model integrates filtering and silencing, and reduces noises by 25 decibels.
Description
Technical field
The utility model relates to the silencing apparatus technical field, and is especially a kind of on the intensive unit of Roots blower, collection filter element filtering noise elimination effect one, intensive compact type impedance muffler.
Background technique
The noise of Roots blower mainly comprises aerodynamic noise and mechanical noise, and wherein intensity is maximum, what have the greatest impact is aerodynamic noise.The control of the noise of blower fan is generally considered from three link: (1), effect a radical cure noise from sound source; (2), take measures in the noise transmission path; (3), take protective measures at the noise acceptance point.It is actual wherein to take measures in the noise transmission path, for this reason, for these characteristics of Roots blower, for at the path of propagation noise reduction, the normal measure of adopting is to install silencing apparatus additional in the blower fan import, for reducing the noise of blower fan, so the performance of silencing apparatus has conclusive impact for soundproof effect.
The model utility content
The purpose of this utility model is to provide a kind of blower fan composite muffler, by the structure of silencing apparatus being carried out optimal design again, reaches the purpose of better noise reduction noise abatement, improves the performance of silencing apparatus.
The technical scheme in the invention for solving the technical problem is: a kind of blower fan composite muffler, by urceolus, inner core, top cover and base plate consist of, urceolus and inner core are coaxial to be nested with, top cover and base plate respectively shutoff at two ends up and down, form the first cavity of an annular and the second cavity of a column in inside, and be provided with the some through holes that are communicated with two cavitys at described inner core, be provided with some intake grills at the base plate corresponding with the first cavity, be provided with exhaust outlet at the base plate corresponding with the second cavity, it is characterized in that, in described the first cavity, be provided with the first foam body of annular and the second foam body of annular, described the first foam body is fitted on the inwall of urceolus, described the second foam body is fitted on the outer wall of inner core, and the density of described the first foam body is greater than the density of the second foam body.
The first foam body is common sponge, and the second foam body is the netted sponge of polyurethane, and the gas penetration of the second foam body is better.
The surface that is arranged in described first foam body of the first cavity is the flexuose of ring-type, forms crest and trough, is commonly called as peak sponge.
The place is provided with the guide duct that extends inward certain-length at described intake grill, and the length of guide duct is 1/5th to 1/4th of urceolus length; End at the close exhaust outlet in the inboard of described inner core is provided with interior airduct, and the length of described interior airduct is greater than the length of guide duct; Be provided with outward extending flange for fixed installation usefulness at described exhaust outlet place.
Carry out removable connection by ear stud between described top cover and the urceolus.
The beneficial effects of the utility model are: owing to pass through guide duct by import, increase silencing apparatus intake grill sectional area, it is restless to reduce air-flow; Urceolus is corrugated the first foam body with the surface, can significantly eliminate noise, inboard netted the second foam body of polyurethane and the change of duct cross-section further reduce noise, a series of like this noise reduction measure is finally finished the intake noise reduction to Roots blower.The second foam body has the effect of filtration concurrently, and the utility model collection filters, eliminating the noise acts on one, reduces about about 25 decibels of noise.
Description of drawings
Fig. 1 is complete section schematic representation of the present utility model;
Among the figure: 1 top cover, 2 lifting bolts, 3 inner support ring flat-plates, 4 urceolus, 5 first foam bodies, 6 guide ducts, 7 base plates, 8 stiffening ribs, 9 flanges, 10 pressure interfaces, 11 interior airducts, 12 second foam bodies, 13 inner cores, 21 first cavitys, 22 second cavitys,
Embodiment
As shown in Figure 1,
A kind of blower fan composite muffler, comprise by urceolus 4, inner core 13, top cover 1 and base plate 7 consist of, urceolus 4 and inner core are coaxial to be nested with, top cover 1 and base plate 7 respectively shutoff at two ends up and down, and at inner core and base plate, be welded and fixed between urceolus and the base plate, upper top cover is fixed by lifting bolt 2, and there is inner support ring flat-plate 3 to strengthen join strength, namely dismantled and assembled, also be convenient to lifting, so just form the first cavity 21 of an annular and the second cavity 22 of a column in inside, be provided with the some through holes that are communicated with two cavitys at inner core 13, be provided with some intake grills at the base plate corresponding with the first cavity 7, be provided with exhaust outlet at the base plate corresponding with the second cavity, so just formed the circuitous channel of an airflow, air-flow enters from intake grill, from exhaust outlet out, be the skeleton of rigidity air-flow path.Be provided with the guide duct 6 that extends inward certain-length at the intake grill place, the length of guide duct is 1/5th to 1/4th of urceolus length, and guide duct is a plurality of, and and base plate between be welded to connect.End at the close exhaust outlet in the inboard of inner core is provided with interior airduct 11, the length of interior airduct is greater than the length of guide duct, be about 1/4th to 1/3rd of inner core length, be convenient to the fully circuitous of air-flow, can reduce the main frequency noise of blower fan by guide duct and interior airduct.
Be provided with outward extending flange 9 for fixed installation usefulness at the exhaust outlet place, this flange 9 is used for being connected with the intake grill of blower fan, is to improve join strength, at the airduct of flange stiffening rib 8 is set, and improves the connection join strength.For ease of the pressure at monitoring intake grill place, establish a pressure interface 10 at the intake grill flange, the pressure interface is connected with the external world as required.
In the first cavity, be provided with the first foam body 5 of annular and the second foam body 12 of annular, the first foam body 5 wherein is peak sponge (surface is wave-like), the surface of the first foam body is the flexuose of ring-type, form crest and trough, be commonly called as peak sponge, the first sponge 5 is shown consideration for and is combined on the inwall of urceolus 4, form the acoustic(al)absorbent of an annular, process medium wave peak vibrations in gas shock, and carry out sound-absorbing with the micropore of foam body self, attracting the traditional surface of effect wall is that the foam body sound-absorbing effect on plane is more obvious.The second foam body 12 is the netted sponge of polyurethane, the gas penetration of the second foam body is better, the second foam body 12 is fitted on the outer wall of inner core, such the second sponge is take inner core as support frame, the second sponge has the double action of noise reduction and filtration, the density of the first above-mentioned foam body should be the effect that the second sponge has filter core concurrently greater than the density of the second foam body.
Top cover wherein removes and installs conveniently, makes things convenient for the replacing of the netted sponge of filter core polyurethane to clean.
This silencing apparatus considers that corresponding blower sizes revises the silencing apparatus physical dimension on contour structure size, reach intensive compactness.
Except the described technical characteristics of specification, be the known technology of those skilled in the art.
Claims (5)
1. blower fan composite muffler, by urceolus, inner core, top cover and base plate consist of, urceolus and inner core are coaxial to be nested with, top cover and base plate respectively shutoff at two ends up and down, form the first cavity of an annular and the second cavity of a column in inside, and be provided with the some through holes that are communicated with two cavitys at described inner core, be provided with some intake grills at the base plate corresponding with the first cavity, be provided with exhaust outlet at the base plate corresponding with the second cavity, it is characterized in that, in described the first cavity, be provided with the first foam body of annular and the second foam body of annular, described the first foam body is fitted on the inwall of urceolus, described the second foam body is fitted on the outer wall of inner core, and the density of described the first foam body is greater than the density of the second foam body.
2. a kind of blower fan composite muffler according to claim 1 is characterized in that, the first foam body is common sponge, and the second foam body is the netted sponge of polyurethane.
3. a kind of blower fan composite muffler according to claim 2 is characterized in that, the surface that is arranged in described first foam body of the first cavity is the flexuose of ring-type, forms crest and trough.
4. a kind of blower fan composite muffler according to claim 1 is characterized in that the place is provided with the guide duct that extends inward certain-length at described intake grill, and the length of guide duct is 1/5th to 1/4th of urceolus length; End at the close exhaust outlet in the inboard of described inner core is provided with interior airduct, and the length of described interior airduct is greater than the length of guide duct; Be provided with outward extending flange for fixed installation usefulness at described exhaust outlet place.
5. a kind of blower fan composite muffler according to claim 1 is characterized in that, carries out removable connection by ear stud between described top cover and the urceolus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220463473.1U CN202789547U (en) | 2012-09-12 | 2012-09-12 | Combined silencer for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220463473.1U CN202789547U (en) | 2012-09-12 | 2012-09-12 | Combined silencer for fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789547U true CN202789547U (en) | 2013-03-13 |
Family
ID=47816817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220463473.1U Expired - Lifetime CN202789547U (en) | 2012-09-12 | 2012-09-12 | Combined silencer for fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202789547U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244464A (en) * | 2013-04-28 | 2013-08-14 | 山东省章丘鼓风机股份有限公司 | Roots blower pipeline noise reduction device |
| CN104110381A (en) * | 2014-06-10 | 2014-10-22 | 宁波升鸿机械设备有限公司 | Muffling bucket used for roots blower |
| CN104358676A (en) * | 2014-10-24 | 2015-02-18 | 珠海市茂田科技有限公司 | Micro piezoelectric ceramic air pump |
| CN104373326A (en) * | 2014-10-24 | 2015-02-25 | 珠海市茂田科技有限公司 | Large-displacement minitype piezoelectric ceramic pump |
| CN105275780A (en) * | 2014-07-07 | 2016-01-27 | 上海日立电器有限公司 | Hush pipe connecting structure applied to compressor silencer |
| CN105729667A (en) * | 2016-04-27 | 2016-07-06 | 德清县百盛塑料有限公司 | Plastic granulating system with draught fan noise enclosures |
| CN105729661A (en) * | 2016-04-27 | 2016-07-06 | 德清县百盛塑料有限公司 | Low-noise plastics production system with water heating stock bin |
| CN105835256A (en) * | 2016-04-27 | 2016-08-10 | 德清县百盛塑料有限公司 | Low-noise plastic granulation device capable of realizing efficient charge |
| CN105835255A (en) * | 2016-04-27 | 2016-08-10 | 德清县百盛塑料有限公司 | Low-noise plastic production device convenient for raw material preheating |
| CN107237782A (en) * | 2017-07-21 | 2017-10-10 | 江苏海鼎电气科技有限公司 | A kind of zigzag silencing apparatus |
| CN107299917A (en) * | 2016-04-15 | 2017-10-27 | 济南枭龙重工机械有限公司 | A kind of environment-friendly highly efficient noise reduction cooling air blower |
| CN109185390A (en) * | 2018-09-18 | 2019-01-11 | 方碧水 | A kind of environment-friendly type silencing apparatus |
| CN109441861A (en) * | 2018-12-26 | 2019-03-08 | 济南风机厂有限责任公司 | Cooling blower with filtering silencing apparatus |
| CN113883057A (en) * | 2021-09-27 | 2022-01-04 | 宜兴富曦机械有限公司 | Filter for suction inlet of Roots vapor compressor |
-
2012
- 2012-09-12 CN CN201220463473.1U patent/CN202789547U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244464A (en) * | 2013-04-28 | 2013-08-14 | 山东省章丘鼓风机股份有限公司 | Roots blower pipeline noise reduction device |
| CN104110381A (en) * | 2014-06-10 | 2014-10-22 | 宁波升鸿机械设备有限公司 | Muffling bucket used for roots blower |
| CN105275780A (en) * | 2014-07-07 | 2016-01-27 | 上海日立电器有限公司 | Hush pipe connecting structure applied to compressor silencer |
| CN104358676A (en) * | 2014-10-24 | 2015-02-18 | 珠海市茂田科技有限公司 | Micro piezoelectric ceramic air pump |
| CN104373326A (en) * | 2014-10-24 | 2015-02-25 | 珠海市茂田科技有限公司 | Large-displacement minitype piezoelectric ceramic pump |
| CN107299917B (en) * | 2016-04-15 | 2019-01-01 | 济南枭龙重工机械有限公司 | A kind of environment-friendly highly efficient noise reduction cooling air blower |
| CN107299917A (en) * | 2016-04-15 | 2017-10-27 | 济南枭龙重工机械有限公司 | A kind of environment-friendly highly efficient noise reduction cooling air blower |
| CN105835255A (en) * | 2016-04-27 | 2016-08-10 | 德清县百盛塑料有限公司 | Low-noise plastic production device convenient for raw material preheating |
| CN105835256A (en) * | 2016-04-27 | 2016-08-10 | 德清县百盛塑料有限公司 | Low-noise plastic granulation device capable of realizing efficient charge |
| CN105729661A (en) * | 2016-04-27 | 2016-07-06 | 德清县百盛塑料有限公司 | Low-noise plastics production system with water heating stock bin |
| CN105729667A (en) * | 2016-04-27 | 2016-07-06 | 德清县百盛塑料有限公司 | Plastic granulating system with draught fan noise enclosures |
| CN107237782A (en) * | 2017-07-21 | 2017-10-10 | 江苏海鼎电气科技有限公司 | A kind of zigzag silencing apparatus |
| CN109185390A (en) * | 2018-09-18 | 2019-01-11 | 方碧水 | A kind of environment-friendly type silencing apparatus |
| CN109185390B (en) * | 2018-09-18 | 2020-05-08 | 马鞍山纽盟知识产权管理服务有限公司 | Environment-friendly noise eliminator |
| CN109441861A (en) * | 2018-12-26 | 2019-03-08 | 济南风机厂有限责任公司 | Cooling blower with filtering silencing apparatus |
| CN113883057A (en) * | 2021-09-27 | 2022-01-04 | 宜兴富曦机械有限公司 | Filter for suction inlet of Roots vapor compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |