CN107246405A - A kind of fan blade - Google Patents
A kind of fan blade Download PDFInfo
- Publication number
- CN107246405A CN107246405A CN201710125481.2A CN201710125481A CN107246405A CN 107246405 A CN107246405 A CN 107246405A CN 201710125481 A CN201710125481 A CN 201710125481A CN 107246405 A CN107246405 A CN 107246405A
- Authority
- CN
- China
- Prior art keywords
- otch
- blade
- fan blade
- apart
- edge
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of fan blade, the leaf packet contains some otch, otch is to penetrate blade front and rear surfaces, the otch nearest apart from fan blade leading edge is located at apart from the arc length of fan blade leading edge 1/10, and the otch nearest apart from fan blade trailing edge is located at apart from the arc length of fan blade trailing edge 1/10, between fan blade leading edge and two row's otch of the arc length of trailing edge 1/10, order arranges some otch, otch is two-by-two apart from 10mm, the lower end closed of otch is at from blade lower edge 8mm, and the upper end open of otch is in the upper limb of blade；Otch in face of the inclination angle of inlet air be 65 °, the wide 3mm of otch.The upper limb of fan blade is zigzag, facewidth 5mm, tooth pitch 6mm.By changing the design of fan blade and upper limb edge, carry out penetration otch and upper limb in blade and designed using sawtooth pattern, influence the static characteristic of blower fan and the flow behavior of surrounding air.Due to the design of otch, the static pressure distribution on blade is changed, suppresses and reduces respective cut blade inlet edge and top backflow, so that the generation for inhibiting vortex to depart from, reaches the effect of noise reduction.
Description
Technical field
The present invention relates to a kind of structure design of blower fan, belong to field of fluid machinery.
Background technology
Blower fan is to be supplied gas side by side body using the mechanical energy of impeller or the rotation of the rotor of other forms to improve gas pressure
Machinery
Equipment, it is widely used in the fields such as family, petrochemical industry, metallurgy, mine, space flight and the energy.Small axial flow fan
As one kind of blower fan, size is small, is normally used for the heat dissipation ventilation of the small sized products such as household electrical appliances, computer, server, main performance
It is mainly reflected in performance of ventilating and the aspect of noise two.
And fan noise is most important noise source in many equipment.As the household electrical appliances such as computer, fan, air-conditioning are in office
With the popularization used in family, influence of the people to noise problem to people is increasingly paid close attention to, if user is in this for a long time
In the noise of a little products, health can be caused harm.
Wherein, the air quantity and efficiency of many rotor fans of convection rotary type have greatly improved with respect to single rotor small-sized fanses, still
Aerodynamic noise also increases more, therefore many rotor small axial flow fans carry out Research of Noise Reduction and are significant.
The content of the invention
The present invention is directed to the noise problem of existing blower fan, proposes a kind of fan blade of meter, can reduce noise.
In order to reach the goal of the invention of the present invention, the technical solution adopted by the present invention is：
A kind of fan blade, the leaf packet contains some otch, and otch is penetrates blade front and rear surfaces, apart from fan blade leading edge
Nearest otch is located at is located at distance apart from the arc length of fan blade leading edge 1/10, and the otch nearest apart from fan blade trailing edge
The arc length of fan blade trailing edge 1/10, between fan blade leading edge and two row's otch of the arc length of trailing edge 1/10, order is arranged
Some otch, otch is two-by-two apart from 10mm, and the lower end closed of otch is at from blade lower edge 8mm, and the upper end open of otch is in leaf
The upper limb of piece；Otch in face of the inclination angle of inlet air be 65 °, the wide 3mm of otch.
It is preferred that, the upper limb of fan blade is zigzag, facewidth 5mm, tooth pitch 6mm.
The beneficial effects of the present invention are：By changing the design of fan blade and upper limb edge, penetrated in blade
Formula otch and upper limb are designed using sawtooth pattern, influence the static characteristic of blower fan and the flow behavior of surrounding air.Due to otch
Design, fluid flows to suction surface from pressure face by otch, causes fluid leakage, causes the static pressure of fan to rise and declines；Change simultaneously
The static pressure distribution become on blade, suppresses and reduces time that respective cut blade inlet edge and top are flowed to suction surface by pressure face
Stream, also suppresses and reduces the generation of blade suction surface refluence, so that the generation for inhibiting vortex to depart from, reaches the effect of noise reduction
Really.
Brief description of the drawings
Fig. 1 is the schematic diagram of the fan blade of embodiment 2.Wherein 1 it is blade inlet edge, 2 is blade trailing edge, 3 is otch, 4
It is the upper end of otch for the lower end of otch, 5,6 be blade lower edge, and 7 be blade upper limb.
Embodiment
The present invention is further illustrated below in conjunction with drawings and the specific embodiments.
Embodiment 1
Home-use single rotor small-sized fanses, 12 otch of its blade, otch is penetrates blade front and rear surfaces, before fan blade
The nearest otch of edge is located at apart from the arc length of fan blade leading edge 1/10, and the otch nearest apart from fan blade trailing edge be located at away from
From the arc length of fan blade trailing edge 1/10, between fan blade leading edge and two row's otch of the arc length of trailing edge 1/10, order is arranged
Arrange some otch, otch two-by-two apart from 10mm, the lower end closed of otch at from blade lower edge 8mm, the upper end open of otch in
The upper limb of blade；Otch in face of the inclination angle of inlet air be 65 °, the wide 3mm of otch.
Embodiment 2
Family's convection rotary type birotor fan, front and rear blade misplaces arrangement two-by-two, as embodiment 1 carries out otch cloth on each blade
Put.
Embodiment 3
Home-use single rotor small-sized fanses, its blade such as embodiment 1 carries out otch arrangement, and the upper limb of fan blade is set in addition
Zigzag, facewidth 5mm, tooth pitch 6mm.
Comparative example
Home-use single rotor small-sized fanses, its blade non-incision, the usual curved line of blade upper limb, other blower sizes, blade chi
Very little grade is completely same with embodiment 1.
The analysis of waiting for quietly property is carried out to the blower fan of each embodiment and comparative example, using total head-flow analysis method, analysis result shows
Show：Compared with comparative example 1, the coefficient of total pressure of embodiment 1~3 is reduced because the otch of blade can enable flow through otch from
Pressure face flows to suction surface, causes leakage, declines coefficient of total pressure, wherein the decline best results of embodiment 3, with comparative example 1
Compare, decline reaches 15%.
Analysis of Noise Properties is carried out to the blower fan of each embodiment and comparative example, each embodiment and comparative example fan most
Good operating point sets monitoring point to carry out overall sound pressure level test, and the overall sound pressure level of each embodiment relatively example has reduction, wherein
Embodiment 1 reduces 1.5dB, and embodiment 2 reduces 1.8dB, and the best results of embodiment 3 reduce 2.6dB.
Claims (6)
1. a kind of fan blade, it is characterised in that：The leaf packet contains some otch, and otch penetrates blade front and rear surfaces.
2. a kind of fan blade according to claim 1, it is characterised in that：The otch, apart from fan blade leading edge most
Near otch is located to be located at apart from wind apart from the arc length of fan blade leading edge 1/10, and the otch nearest apart from fan blade trailing edge
The arc length of machine blade trailing edge 1/10.
3. a kind of fan blade according to claim 2, it is characterised in that：Apart from fan blade leading edge and trailing edge 1/10
Between two row's otch of arc length, some otch are sequentially arranged, otch is two-by-two apart from 10mm.
4. a kind of fan blade according to claim 3, it is characterised in that：The lower end closed of the otch is under from blade
At edge 8mm, the upper end open of otch is in the upper limb of blade.
5. a kind of fan blade according to claim 4, it is characterised in that：The inclination angle of the otch in face of inlet air is
65 °, the wide 3mm of otch.
6. a kind of fan blade according to claim 1, it is characterised in that：The upper limb of the blade is zigzag, the facewidth
5mm, tooth pitch 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710125481.2A CN107246405A (en) | 2017-03-04 | 2017-03-04 | A kind of fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710125481.2A CN107246405A (en) | 2017-03-04 | 2017-03-04 | A kind of fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107246405A true CN107246405A (en) | 2017-10-13 |
Family
ID=60017294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710125481.2A Withdrawn CN107246405A (en) | 2017-03-04 | 2017-03-04 | A kind of fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107246405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927822A (en) * | 2020-07-24 | 2020-11-13 | 江苏大学 | Novel side runner pump blade capable of effectively reducing vibration and noise of side runner pump |
-
2017
- 2017-03-04 CN CN201710125481.2A patent/CN107246405A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927822A (en) * | 2020-07-24 | 2020-11-13 | 江苏大学 | Novel side runner pump blade capable of effectively reducing vibration and noise of side runner pump |
| CN111927822B (en) * | 2020-07-24 | 2022-05-20 | 江苏大学 | Side runner pump blade capable of effectively reducing vibration and noise of side runner pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171013 |