CN207634402U - A kind of wind turbine noise reduction spiral tougue - Google Patents
A kind of wind turbine noise reduction spiral tougue Download PDFInfo
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- CN207634402U CN207634402U CN201721873158.5U CN201721873158U CN207634402U CN 207634402 U CN207634402 U CN 207634402U CN 201721873158 U CN201721873158 U CN 201721873158U CN 207634402 U CN207634402 U CN 207634402U
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- noise reduction
- volute tongue
- wind turbine
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Abstract
The utility model discloses a kind of wind turbine noise reduction spiral tougue, which includes volute tongue ontology, it is characterised in that：The upper side of the volute tongue ontology and downside have been respectively formed on noise reduction cavity, and outer cover compatible with volute tongue ontology is externally provided in the volute tongue ontology, and are provided on the outer cover and the one-to-one noise reduction hole of the noise reduction cavity.Compared with prior art, the utility model has the advantage of：The wind turbine noise reduction spiral tougue on the upper side of volute tongue ontology and downside by forming noise reduction cavity, it is provided on the external outer cover of volute tongue sheet and the one-to-one noise reduction hole of noise reduction cavity, each noise reduction cavity constitutes independent noise reduction cavity with the cooperation of noise reduction hole, volute tongue is allow to carry out noise reduction using Helmholz resonance noise-cancelling theory, it is not only simple in structure, and noise reduction sound-deadening effect is preferable.
Description
Technical field
The utility model is related to a kind of range hoods, more particularly, to a kind of wind turbine noise reduction spiral tougue.
Background technology
The main function of wind turbine volute tongue for range hood is to shut off and (impeller is prevented to drive air-flow idle running without going out),
In general volute tongue can be divided into sharp tongue, deep tongue, short tongue, flat tongue, and for traditional straight volute tongue, volute tongue is deeper, it and impeller
Gap is smaller, and efficiency improves, but noise increases.The flowing velocity of spiral case interior air-flow is along in axis direction distribution substantially
Between flow velocity it is big, both ends flow velocity it is small conic section distribution, from fluid emulation analyze result it is found that near fan outlet due to
Midrange speed is big, and both ends speed is small, thus has the apparent intermediate Secondary Flow toward left and right sides flowing to form Maelstrom, this existing
As the generally existing in traditional straight volute tongue wind turbine.
In order to reduce fan noise and eliminate whirlpool, people improve the structure of volute tongue, such as application No. is
Disclosed in the Chinese invention patent application of 201110427490.X (application publication number is 102518603 A of CN)《Lampblack absorber wind
Machine and the kitchen ventilator for being equipped with the wind turbine》, by forming the recess portion to snail row shell outer concave in the volute tongue portion of snail row shell, to
From the point of view of on the direction of air outlet, recess portion is arc, although by the way that recess portion is arranged rectification can be carried out to air-flow herein, to
When reducing kitchen ventilator work at the volute tongue portion caused by noise, but the gap size phase of the lower face of the volute tongue and impeller
Together, thus, when blower fan work, is easy to generate whirlpool in the front and rear sides of volute tongue.For another example application No. is the (Shens 201210210890.X
Please publication No. be 103512064A) Chinese invention patent application disclosed in《Smoke exhaust ventilator and its spiral case, volute tongue》, volute tongue
Including inner concave, inner concave is smooth surface, to keep the air-flow at volute tongue more smooth, and then advantageously reduces noise, though
So, the improved volute tongue being since air-flow has part to slow down among volute tongue and advantageously reduces noise, but upper due to volute tongue
Joint face is plane, and the front and back air-flow of volute tongue both sides is normally gone out, and since middle air flow speed is big, thus middle air flow is with before
Air-flow almost impacts the joint face in synchronization afterwards, and noise superposition is caused to increase.Volute tongue structure master disclosed above
Noise reduction is carried out by changing the moulding surface structure of volute tongue inlet side, although also having preferable noise reduction, volute tongue processing
It is not easy, increases the manufacturing cost of volute tongue.
Utility model content
Technical problem to be solved in the utility model is present situation for the above-mentioned prior art, provide it is a kind of it is simple in structure,
The wind turbine noise reduction spiral tougue of excellent noise reduction effect.
Technical solution is used by the utility model solves above-mentioned technical problem：The wind turbine noise reduction spiral tougue includes volute tongue sheet
Body, it is characterised in that：The upper side of the volute tongue ontology and downside have been respectively formed on noise reduction cavity, in the volute tongue ontology peripheral hardware
There is outer cover compatible with volute tongue ontology, and is provided on the outer cover and the one-to-one noise reduction hole of the noise reduction cavity.
Preferably, the noise reduction cavity of the volute tongue ontology upper side forms water conservancy diversion noise reduction cavity, the noise reduction of volute tongue ontology downside
Chamber forms reflux noise reduction cavity, and accordingly, the upper side of the outer cover is guide face, and the downside of outer cover is backflow surface, described
The noise reduction hole is provided on guide face and backflow surface.
Further preferably, it is mutually linked by the grouping teaching to smoothly transit between the guide face and backflow surface of the outer cover.
In order to make volute tongue denoising structure and the air velocity of volute tongue front and back end be adapted, the noise reduction hole area S with it is corresponding
The ratio S/V of noise reduction cavity volume V meet following condition：It is maximum with the S/V values of impeller central disc corresponding position, and S/V values are certainly
It is gradually reduced to the front and rear sides of volute tongue with impeller central disc corresponding position.
As a preferred embodiment, the noise reduction hole area S being located on outer cover same side is equal in magnitude, on the upside of volute tongue ontology
Noise reduction cavity on face and downside is being minimum with the volume V of impeller central disc corresponding position, and same positioned at volute tongue ontology
The volume V of noise reduction cavity on side becomes larger with impeller central disc corresponding position to the front and rear sides of volute tongue certainly.
The depth for being preferably located at the noise reduction cavity on volute tongue ontology same side is identical, and the noise reduction cavity on same side
Sectional area from being become larger to the front and rear sides of volute tongue with impeller central disc corresponding position.
Preferably, the sectional area size of the noise reduction cavity on same side is equal, the drop being located on volute tongue ontology same side
Make an uproar chamber depth from being become larger to the front and rear sides of volute tongue with impeller central disc corresponding position.
Further preferably, noise reduction hole area S all on the outer cover is equal in magnitude.
As another preferred embodiment, the volume size for being located at the noise reduction cavity on volute tongue ontology same side is equal, is located at
Noise reduction hole area S on outer cover same side is tapered into impeller central disc corresponding position to the front and rear sides of volute tongue certainly.
Preferably, the volute tongue ontology is an integral molding structure.
Compared with prior art, the utility model has the advantage of：The wind turbine noise reduction spiral tougue passes through in the upper of volute tongue ontology
Form noise reduction cavity on side and downside, be provided on the external outer cover of volute tongue sheet with the one-to-one noise reduction hole of noise reduction cavity, often
A noise reduction cavity constitutes independent noise reduction cavity with the cooperation of noise reduction hole so that volute tongue can be dropped using Helmholz resonance noise-cancelling theory
It makes an uproar, is not only simple in structure, and noise reduction sound-deadening effect is preferable.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model embodiment one；
Fig. 2 is the decomposition diagram of the utility model embodiment one；
Fig. 3 is the decomposition diagram of one another angle of the utility model embodiment；
Fig. 4 is the internal structure schematic diagram of the utility model embodiment one；
Fig. 5 is the noise reduction cavity sectional area change schematic diagram of the volute tongue ontology of the utility model embodiment one；
Fig. 6 is the blower fan structure schematic diagram for the volute tongue for being equipped with the utility model embodiment one；
Fig. 7 is the noise reduction hole change schematic diagram on the volute tongue outer cover of the utility model embodiment two；
Fig. 8 is the noise reduction cavity change in depth schematic diagram of the volute tongue ontology of the utility model embodiment three.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing embodiment.
Embodiment one：
As shown in Figures 1 to 6, the wind turbine noise reduction spiral tougue in the present embodiment includes volute tongue ontology 1 and is located at volute tongue ontology
Outer outer cover 2, volute tongue ontology 1 are an integral molding structure, and the shape of outer cover 2 is adapted with volute tongue ontology 1.Wherein, volute tongue ontology 1
Upper side and downside on be equipped with noise reduction cavity 11, and the noise reduction cavity 11 on upper side forms water conservancy diversion noise reduction cavity, on downside
Noise reduction cavity 11 formed reflux noise reduction cavity；Accordingly, the upper side of outer cover 2 forms guide face 22, and the downside of outer cover 2 is formed back
Stream interface 23, be provided on guide face 22 with the one-to-one noise reduction hole 21 of water conservancy diversion noise reduction cavity, be provided with and flow back in backflow surface 23
The one-to-one noise reduction hole of noise reduction cavity 21.In addition, the shunting between the guide face 22 and backflow surface 23 of outer cover 2 by smoothly transitting
Face 24 is mutually linked.
According to Helmholz resonance principle, the resonant frequency of each independent noise reduction cavity 11 isC is the velocity of sound, S
For 21 area of corresponding noise reduction hole, V is noise reduction cavity volume, and L is 21 effective neck length of noise reduction hole.It follows that constant in other parameters
In the case of, 11 volume of noise reduction cavity becomes larger, and resonant frequency f reduces, conversely, 11 volume of noise reduction cavity becomes smaller, resonant frequency f becomes larger.
Using Helmholz resonance noise reduction principle, the air column in noise reduction hole 21 constitutes elasticity resonance with the air in noise reduction cavity 11 and is
System, when the partial noise frequency of range hood is identical with the intrinsic frequency of this resonator system, the air column in noise reduction hole 21
Resonance occurs and severe friction occurs with hole wall, friction makes acoustic energy be converted into thermal energy, to achieve the purpose that noise elimination.
According to the velocity flow profile at fan outlet it is found that the air velocity at corresponding impeller central disc 3 is maximum, disk before and after impeller
The air velocity at place is minimum, in conjunction with above-mentioned Helmholz resonance principle, 21 area S of noise reduction hole and 11 volume V of corresponding noise reduction cavity
Ratio S/V need to meet following condition：It is maximum with the S/V values of 3 corresponding position of impeller central disc, and S/V values from impeller central disc 3
Corresponding position is gradually reduced to the front and rear sides of volute tongue.
In the present embodiment, the area S for being located at the noise reduction hole 21 on 2 same side of outer cover is equal in magnitude, it is of course also possible to set
Count into the equal-sized structures of area S in all noise reduction holes 21 on outer cover 2.Noise reduction on 1 upper side of volute tongue ontology and downside
Chamber 11 is being minimum with the volume V of 3 corresponding position of impeller central disc, and the noise reduction cavity on 1 same side of volute tongue ontology
11 volume V becomes larger with 3 corresponding position of impeller central disc to the front and rear sides of volute tongue certainly.
Also, the variation tendency of the volume V of noise reduction cavity 11 is specific as follows：Noise reduction on 1 same side of volute tongue ontology
The depth D of chamber 11 is identical, and the sectional area of the noise reduction cavity 11 on same side from 3 corresponding position of impeller central disc to volute tongue
Front and rear sides become larger, i.e., the sectional area of the noise reduction cavity 11 at C1 is minimum, and gradually becomes along direction shown in arrow A1
Greatly.
Embodiment two：
As shown in fig. 7, the variation tendency of the volume V of the noise reduction cavity 11 of the noise reduction spiral tougue of the present embodiment is specific as follows：It is same
The sectional area size of noise reduction cavity 11 on side is equal, be located at 1 same side of volute tongue ontology on noise reduction cavity 11 depth from
Impeller central disc corresponding position becomes larger to the front and rear sides of volute tongue, i.e., the depth of the noise reduction cavity 11 at C2 is minimum, and
It is become larger along direction shown in arrow A2.Remaining structure is identical as embodiment one, herein not reinflated description.
Embodiment three：
As shown in figure 8, the volume that the noise reduction spiral tougue of the present embodiment is located at the noise reduction cavity 11 on 1 same side of volute tongue ontology is big
It is small equal, and the area S in the noise reduction hole 21 on 2 same side of outer cover from impeller central disc corresponding position to before volute tongue
Both sides taper into afterwards.The area S in the noise reduction hole i.e. at C3 is maximum, and is tapered into along direction described in arrow A3.
Claims (9)
1. a kind of wind turbine noise reduction spiral tougue, including volute tongue ontology (1), it is characterised in that：The upper side of the volute tongue ontology (1) is under
Side has been respectively formed on noise reduction cavity (11), and outer cover (2) compatible with volute tongue ontology is externally provided in the volute tongue ontology (1), and
It is provided on the outer cover (2) and the one-to-one noise reduction hole (21) of the noise reduction cavity (11).
2. wind turbine noise reduction spiral tougue according to claim 1, it is characterised in that：The noise reduction of volute tongue ontology (1) upper side
Chamber (11) forms water conservancy diversion noise reduction cavity, and the noise reduction cavity (11) of volute tongue ontology (1) downside forms reflux noise reduction cavity, accordingly, described
The upper side of outer cover (2) is guide face (22), and the downside of outer cover (2) is backflow surface (23), in the guide face (22) and is returned
The noise reduction hole (21) is provided on stream interface (23).
3. wind turbine noise reduction spiral tougue according to claim 2, it is characterised in that：The guide face (22) of the outer cover (2) with return
It is mutually linked by the grouping teaching (24) to smoothly transit between stream interface (23).
4. wind turbine noise reduction spiral tougue according to claim 1, it is characterised in that：Noise reduction hole (21) the area S with it is corresponding
The ratio S/V of noise reduction cavity (11) volume V meets following condition：It is maximum with the S/V values of impeller central disc corresponding position, and S/V values
It is gradually reduced from impeller central disc corresponding position to the front and rear sides of volute tongue.
5. wind turbine noise reduction spiral tougue according to claim 4, it is characterised in that：Noise reduction on outer cover (2) same side
The area S in hole (21) is equal in magnitude, and the noise reduction cavity (11) on volute tongue ontology (1) upper side and downside is corresponding with impeller central disc
Volume V at position is minimum, and the volume V of the noise reduction cavity (11) on volute tongue ontology (1) same side from and impeller
Mid-game corresponding position becomes larger to the front and rear sides of volute tongue.
6. wind turbine noise reduction spiral tougue according to claim 5, it is characterised in that：On volute tongue ontology (1) same side
The depth of noise reduction cavity (11) is identical, and the sectional area of the noise reduction cavity (11) on same side from impeller central disc corresponding position to
The front and rear sides of volute tongue become larger.
7. wind turbine noise reduction spiral tougue according to claim 5, it is characterised in that：The section of noise reduction cavity (11) on same side
Product it is equal in magnitude, be located at volute tongue ontology (1) same side on noise reduction cavity (11) depth from impeller central disc corresponding position
It is become larger to the front and rear sides of volute tongue.
8. the wind turbine noise reduction spiral tougue according to any claim in claim 5 to 7, it is characterised in that：The outer cover (2)
The area S in upper all noise reduction holes (21) is equal in magnitude.
9. wind turbine noise reduction spiral tougue according to claim 4, it is characterised in that：On volute tongue ontology (1) same side
The volume size of noise reduction cavity (11) is equal, is located at the area S in the noise reduction hole (21) on outer cover (2) same side oneself and impeller central disc
Corresponding position is tapered into the front and rear sides of volute tongue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721873158.5U CN207634402U (en) | 2017-12-27 | 2017-12-27 | A kind of wind turbine noise reduction spiral tougue |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721873158.5U CN207634402U (en) | 2017-12-27 | 2017-12-27 | A kind of wind turbine noise reduction spiral tougue |
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| CN207634402U true CN207634402U (en) | 2018-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721873158.5U Active CN207634402U (en) | 2017-12-27 | 2017-12-27 | A kind of wind turbine noise reduction spiral tougue |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240357A (en) * | 2017-12-27 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of wind turbine noise reduction spiral tougue |
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2017
- 2017-12-27 CN CN201721873158.5U patent/CN207634402U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240357A (en) * | 2017-12-27 | 2018-07-03 | 宁波方太厨具有限公司 | A kind of wind turbine noise reduction spiral tougue |
| CN108240357B (en) * | 2017-12-27 | 2024-05-14 | 宁波方太厨具有限公司 | Noise-reducing volute tongue of fan |
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