CN208578770U - A kind of saw tooth blade for centrifugal blower - Google Patents
A kind of saw tooth blade for centrifugal blower Download PDFInfo
- Publication number
- CN208578770U CN208578770U CN201820922809.3U CN201820922809U CN208578770U CN 208578770 U CN208578770 U CN 208578770U CN 201820922809 U CN201820922809 U CN 201820922809U CN 208578770 U CN208578770 U CN 208578770U
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- blade body
- tooth
- blade
- broached
- centrifugal blower
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- 238000000465 moulding Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 241000282326 Felis catus Species 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model discloses a kind of saw tooth blades for centrifugal blower, it include blade body, wherein, the top and bottom end of the blade body are mounted on the impeller being preset with, broached-tooth design is formed in the blade body leading edge, wherein, the broached-tooth design from the top of blade body along the blade body short transverse extend and the broached-tooth design length account for the blade body height one third；The broached-tooth design includes multiple noise reduction teeth in triangular shape.
Description
Technical field
The utility model relates to centrifugal blower technical fields, more particularly, to a kind of zigzag leaf for centrifugal blower
Piece.
Background technique
Centrifugal blower is the rotation by its impeller so that being centrally formed negative pressure in impeller to which drive gas flow is moved
Equipment is widely used in the multiple fields such as ventilation, dust discharge and cooling and the air-conditioning system of vehicle, ship and building, specifically
Ground, gas is first along impeller axially into high speed rotation the radially flowing out from impeller for then passing through impeller, wherein gas stream
Through vortex can be generated when blade in impeller, the working efficiency of impeller is not only reduced, while can also generate noise.
In bionic field in recent years, it has been found that cat owl can accomplish noiseless flight in flight, this is because
The laciniation of cat owl wing primaries outer rim can play the role of vortex generator, will flow through the big of wing surface
Air-swirl " filtering " inhibits the generation of turbulent boundary layer noise at small vortex fine crushing；Air-flow passes through wing rear Shi Huifa
The raw separation that falls off of being vortexed to significantly reduce aerodynamic noise plays mute effect.
Utility model content
In view of the deficiencies of the prior art, the purpose of this utility model is to provide a kind of work noise is small, operating power disappears
Consume the lower saw tooth blade for centrifugal blower.
To achieve the above object, scheme provided by the utility model are as follows: a kind of saw tooth blade for centrifugal blower, packet
Blade body is included, wherein the top and bottom end of the blade body are mounted on the impeller being preset with, the blade body
Broached-tooth design is formed in leading edge, wherein the broached-tooth design is from the top of blade body along the height side of the blade body
The one third of the height of the blade body is accounted for the length of extension and the broached-tooth design；The broached-tooth design includes more
A noise reduction tooth in triangular shape.
Further, the blade body has a plurality of wind gathering slot along the length direction elongation moulding of its intrados, wherein a plurality of
The wind gathering slot is arranged side by side along the short transverse of the blade body.
Further, the facewidth of the noise reduction tooth is 2.2 ~ 3mm, a height of 1.5 ~ 2.5mm of tooth；Per two adjacent drops
The tooth pitch made an uproar between tooth is 3.2 ~ 4mm.
Compared with the prior art, the utility model has the beneficial effect that being provided with zigzag knot by the leading edge portion in blade
Structure can be effectively reduced the aerodynamic noise generated when impeller work and the working efficiency for improving impeller, while the weight of blade
Also it decreases, effectively reduces the work energy consumption of impeller, play energy conservation and drop dry technical effect；Meanwhile in blade
The wind gathering slot being provided in cambered surface plays the function and effect of aggregation air quantity, considerably increases the discharge quantity of fan of impeller.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the top view of the utility model blade body.
Fig. 3 is the A of the utility model blade body to schematic diagram.
Fig. 4 is partial enlarged view at the B of the utility model.
Fig. 5 is the cross-sectional view of the utility model blade body.
Fig. 6 is the utility model blade body C to schematic diagram.
Wherein, 1- blade body, the top 11-, the bottom end 12-, 13- leading edge, 14- rear, 2- broached-tooth design, 21- noise reduction tooth,
The 211- facewidth, 212- tooth is high, 213- tooth pitch, 3- wind gathering slot.
Specific embodiment
The utility model is described in further detail combined with specific embodiments below:
Referring to shown in attached drawing 1 to attached drawing 6, the utility model is a kind of saw tooth blade for centrifugal blower, includes
Blade body 1, wherein the top 11 and bottom end 12 of blade body 1 are mounted on the impeller being preset with, 1 leading edge of blade body
Broached-tooth design 2 is formed on 13, wherein short transverse of the broached-tooth design 2 from the top of blade body 1 11 along blade body 1 is prolonged
Stretch and the length of broached-tooth design 2 account for the blade body 1 height one third, i.e. the broached-tooth design 2 is set to the blade
The preceding one third section of 1 height of ontology, and latter 2/3rds sections of 1 height of the blade body shapes flushed to be neat；Sawtooth
Structure 2 includes multiple noise reduction teeth 21 in triangular shape.
In the present embodiment, blade body 1 has a plurality of wind gathering slot 3 along the length direction elongation moulding of its intrados, wherein
A plurality of wind gathering slot 3 is arranged side by side along the short transverse of blade body 1；By being provided with a plurality of wind gathering slot 3, so that gas flows through leaf
Assemble in a plurality of wind gathering slot 3 when piece ontology 1, substantially increases the discharge quantity of fan of impeller.
It in the present embodiment, specifically, include multiple blades, which includes shroud and hub disk, multiple blade rings
Shape is distributed between the shroud and hub disk.
In the present embodiment, the facewidth 211 of noise reduction tooth 21 is 2.2 ~ 3mm, and tooth high 212 is 1.5 ~ 2.5mm；Per adjacent
Tooth pitch 213 between two noise reduction teeth 21 is 3.2 ~ 4mm.
Operation principle and process is as follows, and gas stream enters from the air inlet of centrifugal blower along the central axial direction of impeller stream
Enter, under the high-speed rotating work of impeller, gas stream is flowed out from the radial direction of impeller, wherein gas stream first passes through blade
Leading edge 13 flow through and flowed out from the rear 14 of blade after blade, vortex can be generated when flowing through blade, and in the leading edge of blade
13 generate swirl ratios rear 14 generate vortex obviously will it is more, so blade leading edge 13 form zigzag structure to
The vortex of generation is subjected to destruction decomposition, effectively reduces the vortex quantity of blade inlet edge 13, the swirl number per min of trailing edge 14
Amount is also reduced therewith, thus efficiently solve be vortexed brought by aerodynamic noise and the working efficiency of impeller had an impact
Technical problem, meanwhile, the weight of blade can also mitigate so that the operating power consumption of impeller reduces, and the technology for playing energy-saving and noise-reducing is imitated
Fruit；Specifically, short transverse extension and the broached-tooth design 2 of the broached-tooth design 2 from 1 top 11 of blade body along the blade body 1
Length account for the one third of blade height, i.e. the broached-tooth design 2 is the preceding one third for taking shape in 1 height of blade body
Section, and when gas flows through blade, the discharge of gas mainly concentrates on latter 2/3rds sections of 1 height of blade body, the i.e. saw
Toothing 2 is the non-principal position for being set to gas output, and such structure setting is so that the broached-tooth design 2, which plays, destroys whirlpool
While stream will not caused by effective work area due to reducing blade inlet edge 13 too much blade air output by compared with
Big the problem of influencing, so the preceding one third section that broached-tooth design 2 is only set to 1 leading edge 13 of blade body guaranteeing impeller
The air quantity of output reaches the technical effect of energy conservation reduction noise in the case where being substantially unaffected；Blade body 1 is in it simultaneously
The length direction elongation moulding of cambered surface, which plays the role of a plurality of wind gathering slot 3, has aggregation air quantity, so that the discharge quantity of fan of impeller obtains
Increase；So while by broached-tooth design to impeller energy-saving and noise-reducing, the discharge quantity of fan of impeller is also increased by above structure
Add.
In addition, it should be noted that, the specific embodiments described in this specification, each section title etc. can not
Together, all equivalent or simple changes done according to structure, feature and principle described in the concept of the patent of the utility model are included in this
In the protection scope of utility model patent.Those skilled in the art of the present invention can be to described specific reality
Example is applied to do various modifications or additions or be substituted in a similar manner, structure without departing from the utility model or
Beyond the scope defined by this claim, it all should belong to the protection range of the utility model.
Claims (3)
1. a kind of saw tooth blade for centrifugal blower includes blade body (1), wherein the top of the blade body (1)
End (11) and bottom end (12) be mounted on the impeller being preset with, it is characterised in that: on blade body (1) leading edge (13) at
Type has broached-tooth design (2), wherein the broached-tooth design (2) is from the top (11) of blade body (1) along the blade body (1)
Short transverse extend and the broached-tooth design (2) length account for the blade body (1) height one third；The saw
Toothing (2) includes multiple noise reduction teeth (21) in triangular shape.
2. a kind of saw tooth blade for centrifugal blower according to claim 1, it is characterised in that: the blade body
(1) there is a plurality of wind gathering slot (3) along the length direction elongation moulding of its intrados, wherein a plurality of wind gathering slot (3) is along the leaf
The short transverse of piece ontology (1) is arranged side by side.
3. a kind of saw tooth blade for centrifugal blower according to claim 1, it is characterised in that: the noise reduction tooth
(21) the facewidth (211) is 2.2 ~ 3mm, and tooth height (212) is 1.5 ~ 2.5mm；Between per two adjacent noise reduction teeth
Tooth pitch (213) is 3.2 ~ 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820922809.3U CN208578770U (en) | 2018-06-14 | 2018-06-14 | A kind of saw tooth blade for centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820922809.3U CN208578770U (en) | 2018-06-14 | 2018-06-14 | A kind of saw tooth blade for centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208578770U true CN208578770U (en) | 2019-03-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820922809.3U Expired - Fee Related CN208578770U (en) | 2018-06-14 | 2018-06-14 | A kind of saw tooth blade for centrifugal blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208578770U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425450A (en) * | 2020-04-13 | 2020-07-17 | 江苏大学 | Centrifugal pump blade with bionic sawtooth structure at front edge and tail edge |
-
2018
- 2018-06-14 CN CN201820922809.3U patent/CN208578770U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425450A (en) * | 2020-04-13 | 2020-07-17 | 江苏大学 | Centrifugal pump blade with bionic sawtooth structure at front edge and tail edge |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190305 |