CN207989400U - A kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure - Google Patents
A kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure Download PDFInfo
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- CN207989400U CN207989400U CN201820071654.7U CN201820071654U CN207989400U CN 207989400 U CN207989400 U CN 207989400U CN 201820071654 U CN201820071654 U CN 201820071654U CN 207989400 U CN207989400 U CN 207989400U
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- diffuser
- noise elimination
- spiral case
- helmholtz resonance
- resonance noise
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Abstract
The utility model is related to a kind of centrifugal blower diffusers with helmholtz resonance noise elimination structure, belong to noise elimination technique field.It includes helmholtz resonance noise elimination cavity, spiral case, mesosphere, diffuser seat and gear-box；The spiral case is connect with mesosphere, and diffuser seat is connect with spiral case；Gear-box is connect with spiral case and diffuser seat respectively；The helmholtz resonance noise elimination cavity is set on the inner wall of mesosphere and/or diffuser seat.The utility model is simple in structure, compact, reasonable, and manufacturing cost is low, is suitble to use on the high-speed centrifugal fan of all specifications；It can realize effective reduction and inhibition by frequency noise to centrifugal compressor impeller, reduce the overall noise of centrifugal compressor.
Description
Technical field
The utility model is related to a kind of centrifugal blower diffusers with helmholtz resonance noise elimination structure, specifically
A kind of impeller for reducing centrifugal fan belongs to noise elimination technique field by the device of frequency noise.
Background technology
When centrifugal fan is run, the rotating speed of impeller typically is up to up to ten thousand rpms, and impeller is to working gas
Compression generate a specific frequency noise, be referred to as impeller and pass through frequency（BPF: Blade Pass Frequency）, this
The frequency of a noise is typically up to few kilohertz, is the main source of fan noise.
Invention content
It is a kind of with helmholtz resonance noise elimination to provide in place of the purpose of this utility model is to overcome above-mentioned deficiency
The centrifugal blower diffuser of structure, it is simple in structure, at low cost.
The technical solution of the utility model, a kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure, packet
Include helmholtz resonance noise elimination cavity, spiral case, mesosphere, diffuser seat and gear-box；The spiral case is connect with mesosphere, diffuser
Seat is connect with spiral case；Gear-box is connect with spiral case and diffuser seat respectively；The helmholtz resonance noise elimination cavity is set to centre
On the inner wall of circle and/or diffuser seat.
After the spiral case, mesosphere and diffuser seat surround, air ventilation passage is formed.
The spiral case is threadably secured with mesosphere to be connect；Diffuser seat is threadably secured with spiral case to be connect；Gear
Case is threadably secured and connect with spiral case and diffuser seat.
The helmholtz resonance noise elimination cavity includes perforated panel, honeycomb partition board and bottom plate；The honeycomb partition board is set to
Between perforated panel and bottom plate.The depth of the helmholtz resonance noise elimination cavity is 5-70mm.
The beneficial effects of the utility model：The utility model is simple in structure, compact, reasonable, and manufacturing cost is low, is suitble to all
It is used on the high-speed centrifugal fan of specification；It can realize the effective reduction and suppression that frequency noise is passed through to centrifugal compressor impeller
System, reduces the overall noise of centrifugal compressor.
Description of the drawings
Fig. 1 is the utility model section schematic diagram.
Fig. 2 is helmholtz resonance noise elimination cavity structural schematic diagram.
Reference sign：1, helmholtz resonance noise elimination cavity；2, spiral case；3, mesosphere；4, diffuser seat；5, gear
Case；6, air ventilation passage；7, perforated panel；8, honeycomb partition board；9, bottom plate.
Specific implementation mode
As shown in Figs. 1-2, a kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure, including Helmholtz
Resonant silencing chamber 1, spiral case 2, mesosphere 3, diffuser seat 4 and gear-box 5；The spiral case 2 is connect with mesosphere 3, diffuser seat 4
It is connect with spiral case 2；Gear-box 5 is connect with spiral case 2 and diffuser seat 4 respectively；During the helmholtz resonance noise elimination cavity 1 is set to
Between circle 3 and/or diffuser seat 4 inner wall on.
After the spiral case 2, mesosphere 3 and diffuser seat 4 surround, air ventilation passage 6 is formed.
The spiral case 2 is threadably secured with mesosphere 3 and connect；Diffuser seat 4 is threadably secured with spiral case 2 and connect；
Gear-box 5 is threadably secured and connect with spiral case 2 and diffuser seat 4.
The helmholtz resonance noise elimination cavity 1 includes perforated panel 7, honeycomb partition board 8 and bottom plate 9；The honeycomb partition board 7 is set
It is placed between perforated panel 6 and bottom plate 8.
The depth of the helmholtz resonance noise elimination cavity 1 is 5-70mm.The height of blade body is 5 to 100mm.
When utility model works, centrifugal fan operating, noise is propagated along air-flow wind direction, encounters the leading edge of blade,
Identical as blade passing frequency, opposite in phase a sound wave is obtained after the reflection of helmholtz resonance noise elimination cavity 1, to support
Partial blade disappeared by the noise in frequency, has reduced overall noise level.
Claims (5)
1. a kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure, it is characterized in that：Including helmholtz resonance
Noise elimination cavity（1）, spiral case（2）, mesosphere（3）, diffuser seat（4）And gear-box（5）；The spiral case（2）With mesosphere（3）Even
It connects, diffuser seat（4）With spiral case（2）Connection；Gear-box（5）Respectively with spiral case（2）With diffuser seat（4）Connection；The last of the twelve Earthly Branches nurse
Hereby resonant silencing chamber suddenly（1）It is set to mesosphere（3）And/or diffuser seat（4）Inner wall on.
2. the centrifugal blower diffuser with helmholtz resonance noise elimination structure as described in claim 1, it is characterized in that：The snail
Shell（2）, mesosphere（3）With diffuser seat（4）After surrounding, air ventilation passage is formed（6）.
3. the centrifugal blower diffuser with helmholtz resonance noise elimination structure as described in claim 1, it is characterized in that：The snail
Shell（2）With mesosphere（3）It is threadably secured connection；Diffuser seat（4）With spiral case（2）It is threadably secured connection；Gear-box
（5）With spiral case（2）With diffuser seat（4）It is threadably secured connection.
4. the centrifugal blower diffuser with helmholtz resonance noise elimination structure as described in claim 1, it is characterized in that：The last of the twelve Earthly Branches
Mu Huozi resonant silencing chambers（1）Including perforated panel（7）, honeycomb partition board（8）And bottom plate（9）；The honeycomb partition board（8）It is set to
Perforated panel（7）With bottom plate（9）Between.
5. the centrifugal blower diffuser with helmholtz resonance noise elimination structure as described in claim 1, it is characterized in that：The last of the twelve Earthly Branches
Mu Huozi resonant silencing chambers（1）Depth be 5-70mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820071654.7U CN207989400U (en) | 2018-01-16 | 2018-01-16 | A kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820071654.7U CN207989400U (en) | 2018-01-16 | 2018-01-16 | A kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207989400U true CN207989400U (en) | 2018-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820071654.7U Active CN207989400U (en) | 2018-01-16 | 2018-01-16 | A kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN207989400U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087342A (en) * | 2018-01-16 | 2018-05-29 | 江苏杰尔科技股份有限公司 | A kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure |
-
2018
- 2018-01-16 CN CN201820071654.7U patent/CN207989400U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087342A (en) * | 2018-01-16 | 2018-05-29 | 江苏杰尔科技股份有限公司 | A kind of centrifugal blower diffuser with helmholtz resonance noise elimination structure |
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