CN201475009U - Axial-flow fan with anti-resonance and noise-reduction rib plates on casing thereof for air conditioner - Google Patents
Axial-flow fan with anti-resonance and noise-reduction rib plates on casing thereof for air conditioner Download PDFInfo
- Publication number
- CN201475009U CN201475009U CN2009201867831U CN200920186783U CN201475009U CN 201475009 U CN201475009 U CN 201475009U CN 2009201867831 U CN2009201867831 U CN 2009201867831U CN 200920186783 U CN200920186783 U CN 200920186783U CN 201475009 U CN201475009 U CN 201475009U
- Authority
- CN
- China
- Prior art keywords
- casing
- floor
- axial
- flat panel
- noise
- 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
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to an axial-flow fan with anti-resonance and noise-reduction rib plates on a casing thereof for an air conditioner. Through rib plate structures between the outer side of a cylindrical barrel 1 of the casing of the axial-flow fan and a flat panel 2 of the casing, the axial-flow fan changes the frequency Omega of disturbing force and enables the frequency of the disturbing force to be far away from the natural frequency Omegan of the vibration of the blades 5 of the axial-flow fan, the cylindrical barrel 1 of the casing and the flat panel 2 of the casing, therefore, the resonance phenomenon generated by the blades 5, the cylindrical barrel 1 of the casing and the flat panel 2 of the casing, and the purpose of noise reduction is achieved. The axial-flow fan has the advantages of simple structure, convenient implementation and remarkable effect, and plays an active role in improving the people's daily living and production environment and promoting the social harmony.
Description
Technical field
The utility model relates to the manufacturing of idle call propeller fan, is specially its casing stationary part is improved design, produces resonance to avoid blade and casing, thereby reduces the vibration noise and the radiated noise of complete machine.
Background technique
The idle call propeller fan is mainly used in the pressure heat exchange occasion of all kinds of air-conditioner host heat exchangers, stable development along with Chinese national economy, all kinds of air-conditioning equipments have been widely used for the every field of people's productive life, people the each side of surrounding environment is required under the more and more higher situation, it is very urgent to the noise pollution that produces on every side to reduce air-conditioning equipment.In the practical application of air-conditioning equipment, the heat transmission propeller fan that the outer machine of air-cooled unit is installed exists problems such as vibration is big, noise height mostly, and propeller fan is the topmost noise source of air-conditioner host just.Therefore, reduce the noise of idle call propeller fan effectively, improve the daily productive life environment of people, very positive effect is arranged for the harmonious development of society and peaceful coexistence.
The noise of propeller fan is mainly derived from three aspects: aerodynamic noise, vibration noise and radiated noise.For the fixed propeller fan of performance parameter,, can't effectively reduce basically because of the fricative aerodynamic noise of air flows so if its vane type line is also definite; For because of the bigger remaining uneven vibration noise that is produced of rotor itself, in manufacture process, can be improved by improving dynamic balance accuracy; And for because of blade, casing etc. because of the resonance vibration noise and the radiated noise that are produced, must its material select for use or the design of casing stator structure on take adequate measures and method, just can make its effective reduction.
Describe the structural type of existing idle call propeller fan in detail below with reference to Fig. 1.
As shown in Figure 1, existing idle call propeller fan generally is made up of cylinder type cylindrical shell 1, flat panel 2, support 3, motor 4, blade 5 and wheel hub 6, its cylinder type cylindrical shell 1 and flat panel 2 otherwise be whole spinning or whole prolong molded, be to be welded as a whole after the sectional making moulding, its cylinder type cylindrical shell 1 outside and and flat panel 2 parts of its axis normal between other relevance component are not installed.The tabular circular arc full-open type structure of existing idle call Axial Fan Blades 5 general employings, its rigidity is relatively poor, and the impeller that blade 5 and wheel hub 6 are formed cooperates existing gap owing to the inhomogeneous of material and with the between centers of motor 4, therefore the imbalance of whole impeller always exists, so when impeller rotates, also will inevitably produce certain vibration, in a single day the casing of being formed when cylinder type cylindrical shell 1 and flat panel 2 or the vibration natural frequency of blade 5 equal or when approaching the multiple of perturbed force fundamental frequency or perturbed force fundamental frequency, the danger that resonance takes place is just arranged, and the vibration and noise of complete machine can be obviously bigger simultaneously.
The model utility content
In order to reduce vibration noise and the radiated noise that the idle call propeller fan is produced because of resonance with imitating, the utility model improves design to the casing of idle call propeller fan, avoid blade, casing and system to produce resonance, thereby reduce the noise of complete machine effectively, and the change of propeller fan casing outside pattern there is not any negative effect to performances such as the flow of blower fan, pressure.For a propeller fan approved product, can calculate the perturbed force frequency of its blade and casing Natural Frequency of Vibration and system.The propeller fan cylinder type cylindrical shell outside and and the flat panel part of its axis normal between install suitable floor additional, can change the perturbed force frequency of system, make its perturbed force frequency away from natural frequency, thereby avoid the generation of resonance phenomenon, to reach the purpose that reduces noise.
Above-mentioned purpose of the present utility model realizes by following technological scheme:
A kind of casing has the idle call propeller fan of anti-resonance vibration noise reduction floor, is made up of cylinder type cylindrical shell, floor, flat panel, support, motor, blade and wheel hub.Wherein casing is made up of cylinder type cylindrical shell, floor and flat panel, and impeller is made up of blade and wheel hub, and cylinder type cylindrical shell and impeller are same axis, the cylinder type cylindrical shell of the casing outside and with the flat panel part of its axis normal between be connected with floor.
Wherein said number of ribs is 3～15.
Wherein said floor body be triangle tabular, trapezoidal tabular, polygonal is tabular, planar or the bending of U type are tabular.
The Connecting format of wherein said floor and the cylinder type cylindrical shell outside and flat panel is welding, riveted joint or bolt connecting mode.
Description of drawings
Fig. 1 is the idle call propeller fan appearance assumption diagram of general pattern casing
Fig. 2 is the tabular idle call propeller fan appearance assumption diagram of triangle for the floor body
Fig. 3 is trapezoidal tabular idle call propeller fan appearance assumption diagram for the floor body
Fig. 4 is the tabular idle call propeller fan appearance assumption diagram of polygonal for the floor body
Fig. 5 is flat idle call propeller fan appearance assumption diagram for the floor body
Fig. 6 is the tabular idle call propeller fan appearance assumption diagram of U type bending for the floor body
1: cylinder type cylindrical shell 2: flat panel 3: support 4: motor 5: blade 6: wheel hub 7a: the tabular floor 7b of triangle: trapezoidal tabular floor 7c: the tabular floor 7d of polygonal: the tabular floor of planar floor 7e:U type bending
Embodiment
The casing of the idle call propeller fan of general pattern casing as shown in Figure 1: between the outside of cylinder type cylindrical shell 1 and the ground plane panel 2 without any the relevance component.
Casing has the idle call propeller fan of anti-resonance vibration noise reduction floor such as Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6: its floor 7a, 7b, 7c, 7d, 7e all can adopt welding manner that itself and casing cylinder type cylindrical shell 1 outside and ground plane panel 2 are connected as a single entity, and U type bending floor 7e shown in Figure 6 also can adopt riveted joint or bolted mode that itself and casing cylinder type cylindrical shell 1 outside and ground plane panel 2 are connected as a single entity.The setting height(from bottom) h of floor is no more than 3/4ths of cylinder type cylindrical shell 1 height, and the angle α of its hypotenuse or inclined-plane and flat panel 3 is between 15 °～75 °.Learn as calculated, when the setting height(from bottom) h of floor greater than cylinder type cylindrical shell 1 height 3/4ths the time, the vibration natural frequency ω of ground plane panel
nCan approach the multiple of perturbed force fundamental frequency ω or perturbed force fundamental frequency ω, resonance phenomenon can appear in the ground plane panel; When angle α greater than 75 ° or during less than 15 °, casing cylinder type cylindrical shell and ground plane panel must have one vibration natural frequency ω in the middle of the two
nApproach the multiple of perturbed force fundamental frequency ω or perturbed force fundamental frequency ω, must have a meeting resonance phenomenon to occur in the two.
At first according to the rotating speed of idle call propeller fan, behind the blade forming physical dimension, blade each radially cross-sectional area, blade material Young's modulus, blade material density, the number of blade, casing physical dimension, case material Young's modulus, case material density etc. calculate Axial Fan Blades and casing Natural Frequency of Vibration ω
nFundamental frequency ω with perturbed force.Then according to Axial Fan Blades and casing Natural Frequency of Vibration ω
nDetermine required safe perturbed force frequencies omega with the frequencies omega of perturbed force
s, again according to safety perturbed force frequencies omega
sDefinite single floor quality, floor number, floor geometrical shape that should install additional.
The utility model has obvious effects to the vibration and noise reducing of idle call propeller fan.With air quantity 8000m
3The propeller fan of/h, total head 90Pa, 7 blades, impeller diameter 700mm, rotating speed 920r/min is an example: the total noise of centrifuge of surveying when using the plain edition casing is 76dB (A); Use have 8 thickness 4mm, the end * the trapezoidal floor of height as 120mm * 45mm after, surveying its total noise of centrifuge is 73.5dB (A).This shows, use casing to have the idle call propeller fan of anti-resonance vibration noise reduction floor, can effectively reduce noise, improve the productive life environment, play a part positive the harmonious development of society.
Claims (4)
1. a casing has the idle call propeller fan of anti-resonance vibration noise reduction floor, form by cylinder type cylindrical shell, floor, flat panel, support, motor, blade and wheel hub, wherein casing is made up of cylinder type cylindrical shell, floor and flat panel, impeller is made up of blade and wheel hub, cylinder type cylindrical shell and impeller are same axis, it is characterized in that: the cylinder type cylindrical shell of the casing outside and with the flat panel part of its axis normal between be connected with floor.
2. as claims 1 described propeller fan, it is characterized in that: described number of ribs is 3～15.
3. as claims 1 described propeller fan, it is characterized in that: the body of described floor be triangle tabular, trapezoidal tabular, polygonal is tabular, planar or the bending of U type are tabular.
4. as claims 1 described propeller fan, it is characterized in that: the Connecting format of described floor and the cylinder type cylindrical shell outside and flat panel is welding, riveted joint or bolt connecting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201867831U CN201475009U (en) | 2009-08-03 | 2009-08-03 | Axial-flow fan with anti-resonance and noise-reduction rib plates on casing thereof for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201867831U CN201475009U (en) | 2009-08-03 | 2009-08-03 | Axial-flow fan with anti-resonance and noise-reduction rib plates on casing thereof for air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201475009U true CN201475009U (en) | 2010-05-19 |
Family
ID=42411255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201867831U Expired - Fee Related CN201475009U (en) | 2009-08-03 | 2009-08-03 | Axial-flow fan with anti-resonance and noise-reduction rib plates on casing thereof for air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201475009U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454642A (en) * | 2010-10-27 | 2012-05-16 | Lg电子株式会社 | Air conditioner with outdoor unit |
-
2009
- 2009-08-03 CN CN2009201867831U patent/CN201475009U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454642A (en) * | 2010-10-27 | 2012-05-16 | Lg电子株式会社 | Air conditioner with outdoor unit |
| CN102454642B (en) * | 2010-10-27 | 2014-12-17 | Lg电子株式会社 | Air conditioner with outdoor unit |
| US9228591B2 (en) | 2010-10-27 | 2016-01-05 | Lg Electronics Inc. | Air conditioner with outdoor unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201526472U (en) | Centrifugal fan with air inlet at both surfaces | |
| CN201671881U (en) | Axial-flow blade and air conditioner axial-flow fan | |
| JP5351682B2 (en) | Vertical rotating shaft type wind turbine and wind power generator using the same | |
| CN201747672U (en) | Centrifugal wind wheel | |
| CN201475009U (en) | Axial-flow fan with anti-resonance and noise-reduction rib plates on casing thereof for air conditioner | |
| CN203584898U (en) | Low-noise high-efficiency central air conditioner outdoor machine cooling axial-flow fan | |
| CN107359717B (en) | Washing machine, motor, rotor and rotor frame | |
| CN202832670U (en) | Variable section turbochanger fixed nozzle ring | |
| CN104033332A (en) | Vertical-axis wind power generation device | |
| CN202360431U (en) | Fan capable of preventing vane from removing | |
| CN203856648U (en) | Vortex air guide wind-driven generator | |
| CN202665445U (en) | Anti-backflow impeller for dust collector | |
| CN207454347U (en) | A kind of noise elimination efficient centrifugal wind turbine | |
| CN203009334U (en) | Internal recycling centrifugal fan for cooler of wind-driven generator | |
| CN208778298U (en) | A kind of spiral case blower and its blower fan system of application | |
| CN103629156A (en) | Low-noise and efficient cooling axial flow fan of central air conditioner outdoor unit | |
| CN201433940Y (en) | Fan frame of axial-flow type thermal fan | |
| CN208252426U (en) | A kind of impeller | |
| CN203297153U (en) | Exhaust fan impeller | |
| CN201284757Y (en) | Centrifugal blower and air conditioner employing the same | |
| CN202091264U (en) | Installing structure for blades of outer stator axial flow fan | |
| CN221003204U (en) | Brushless condensing fan | |
| CN206419268U (en) | One kind energy-conservation hypsokinesis wind wheel | |
| CN205533354U (en) | Acid and alkali -resistance fan | |
| CN212272440U (en) | Vertical shaft transverse fan blade mechanism stable in connection |
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: 20100519 Termination date: 20100803 |