CN201301835Y - Noise reducing and efficiency improving mechanism of axial-flow fan - Google Patents
Noise reducing and efficiency improving mechanism of axial-flow fan Download PDFInfo
- Publication number
- CN201301835Y CN201301835Y CNU2008201066449U CN200820106644U CN201301835Y CN 201301835 Y CN201301835 Y CN 201301835Y CN U2008201066449 U CNU2008201066449 U CN U2008201066449U CN 200820106644 U CN200820106644 U CN 200820106644U CN 201301835 Y CN201301835 Y CN 201301835Y
- Authority
- CN
- China
- Prior art keywords
- axial
- flow fan
- flow blower
- noise
- bell mouth
- 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
- 230000007246 mechanism Effects 0.000 title claims abstract description 11
- 230000009467 reduction Effects 0.000 claims description 9
- 230000002745 absorbent Effects 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000004378 air conditioning Methods 0.000 abstract description 10
- 230000008602 contraction Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 241000883990 Flabellum Species 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000005534 acoustic noise Effects 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a noise reducing and efficiency improving mechanism of an axial-flow fan, in particular to a noise reducing and efficiency improving device of an axial-flow fan of a high-speed train air conditioning system, pertaining to the technical field of air conditioning equipment of rail transit vehicles, and is characterized in that the mechanism comprises a bell mouth which is connected with an air inlet of the axial-flow fan. By adopting the air inlet structure in which the bell mouth is arranged, the sudden contraction of air inlet can be avoided, the flow resistance loss can be reduced, the aerodynamic performance of the axial-flow fan is improved, the mechanical efficiency can be improved and the noise can be reduced; the arc radius of the bell mouth is not less than 1/5 of the air inlet diameter of the axial-flow fan, therefore the mechanical efficiency is remarkably improved along with the increasing of the bell mouth inlet arc radius; and the shell of the fan is laid with a sound absorption layer, therefore the noise can be reduced effectively.
Description
Technical field
The utility model relates to a kind of axial-flow blower noise reduction synergy mechanism, particularly a kind of be applicable to bullet train air-conditioning system axial-flow blower with the noise enhancing device, belong to the rail traffic vehicles air conditioner technical field.
Background technique
Along with comprehensive speed-raising of China's train, comprehensive operation of EMU, and people are more and more higher for the requirement of air quality in vehicle and comfort level, also become the emphasis of people's research gradually as the air-conditioning equipment of bullet train air conditioning.On the speed car, owing to can cause near the fierceness fluctuation of the air pressure of car body during the vehicle high speed operation, the outdoor exchanger of existing air-conditioning unit all quickens its heat exchange by axial-flow blower, during unit work, high speed rotating by the axial-flow blower flabellum, thereby form negative cavity and outdoor boundary force air is drawn into the axial-flow blower inlet side at air conditioner room outdoor, air-flow passes through condenser and carries out exchange heat then.Hot air after the heat exchange is discharged to the ambient atmosphere from the air draft side of axial-flow blower, thereby reaches the purpose of heat radiation; Axial-flow blower is as the essential elements of air-conditioning unit outdoor ventilation heat radiation, the largest source of equipment acoustic noise, how improving the axial-flow blower static pressure guarantees hot blast is dissipated to outside the car, and when improving fan static pressure, reduce the research emphasis that its running noise becomes the bullet train air-conditioning system.
For the speed car, if the axial-flow blower of non-speed car idle call is directly installed on the speed car air-conditioning unit, its blast obviously is not enough, because the fluctuation of air pressure can cause the frequent air feed deficiency of condensation fan near the car body, make the heat exchange effect of air-conditioning condenser descend, cause the compressor high voltage fault, make that at last the temperature in the guest room does not reach setting value, therefore must improve blower fan.
The model utility content
The utility model technical issues that need to address provide a kind of axial-flow blower noise reduction synergy mechanism, can effectively improve the mechanical efficiency of axial-flow blower, and reduce its running noise.
For solving the problems of the technologies described above, the technological scheme that the utility model adopted is:
Axial-flow blower noise reduction synergy mechanism comprises the horn mouth of a coupling shaft flow fan intake grill in its structure.
The further improvement of the technical solution of the utility model is:
The horn mouth radius of arc is greater than 1/5 of axial-flow blower suction port diameter.
Lay absorbent treatment on the casing of axial-flow blower.
Because the technological progress of having adopted technique scheme, the present utility model to obtain is:
The axial-flow blower that the utility model structure provides is owing to adopted installation horn mouth air intake structure, can avoid the sudden contraction of air intake, reduce fluid resistance losses, improved the aeroperformance of axial-flow blower, can improve its mechanical efficiency, reduce noise, the horn mouth radius of arc should be less than 1/5 of axial-flow blower suction port diameter, and along with the increase of horn mouth import radius of arc, the mechanical efficiency of axial-flow blower obviously improves.Lay absorbent treatment on the casing of blower fan, can effectively reduce noise.
Description of drawings
Fig. 1 is an axial-flow blower noise reduction synergy mechanism structure schematic representation;
Fig. 2 is the plan view of Fig. 1.
Wherein: 1, horn mouth 2, axial-flow blower 4, impeller
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further details:
As shown in Figure 1, the utility model structure comprises that with the horn mouth 1 that axial-flow blower 2 intake grills are connected, the horn mouth radius of arc is greater than 1/5 of axial-flow blower suction port diameter.
Lay absorbent treatment on the casing of axial-flow blower 2, promptly lay the noise reduction sound-absorbing material, this material is the acoustical cotton of white, and this material does not contain the embossing aluminium foil, has another name called Mei Nami.
When impeller 4 rotations, air is sucked by suction port, and axial flow is crossed axial-flow blower 2.Bladed wheel 4 is installed in the casing, and air is under the effect of blade, and pressure increases, and is discharged by exhaust port.
The horn mouth of installing 1 can be avoided the sudden contraction of air intake, reduces fluid resistance losses, reduces noise.
Claims (3)
1, axial-flow blower noise reduction synergy mechanism is characterized in that: the horn mouth that comprises a coupling shaft flow fan intake grill in its structure.
2, axial-flow blower noise reduction synergy according to claim 1 mechanism is characterized in that described horn mouth radius of arc is greater than 1/5 of axial-flow blower suction port diameter.
3, axial-flow blower noise reduction synergy according to claim 1 and 2 mechanism is characterized in that laying absorbent treatment on the casing of described axial-flow blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201066449U CN201301835Y (en) | 2008-11-24 | 2008-11-24 | Noise reducing and efficiency improving mechanism of axial-flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201066449U CN201301835Y (en) | 2008-11-24 | 2008-11-24 | Noise reducing and efficiency improving mechanism of axial-flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201301835Y true CN201301835Y (en) | 2009-09-02 |
Family
ID=41085460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201066449U Expired - Fee Related CN201301835Y (en) | 2008-11-24 | 2008-11-24 | Noise reducing and efficiency improving mechanism of axial-flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201301835Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590222A (en) * | 2013-11-22 | 2014-02-19 | 关朋伟 | Clothes air-drying device |
| CN120187987A (en) * | 2022-11-25 | 2025-06-20 | 大金工业株式会社 | Exhaust |
-
2008
- 2008-11-24 CN CNU2008201066449U patent/CN201301835Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590222A (en) * | 2013-11-22 | 2014-02-19 | 关朋伟 | Clothes air-drying device |
| CN120187987A (en) * | 2022-11-25 | 2025-06-20 | 大金工业株式会社 | Exhaust |
| CN120187987B (en) * | 2022-11-25 | 2026-01-02 | 大金工业株式会社 | Exhaust device |
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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: 20090902 Termination date: 20161124 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |