CN108240357A - A kind of wind turbine noise reduction spiral tougue - Google Patents
A kind of wind turbine noise reduction spiral tougue Download PDFInfo
- Publication number
- CN108240357A CN108240357A CN201711449597.8A CN201711449597A CN108240357A CN 108240357 A CN108240357 A CN 108240357A CN 201711449597 A CN201711449597 A CN 201711449597A CN 108240357 A CN108240357 A CN 108240357A
- Authority
- CN
- China
- Prior art keywords
- noise reduction
- volute tongue
- wind turbine
- cavity
- outer cover
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 3
- 239000006227 byproduct Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000000465 moulding Methods 0.000 description 3
- 241000237858 Gastropoda Species 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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
- F04D29/66—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
- F04D29/665—Sound attenuation by means of resonance chambers or interference
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/422—Discharge tongues
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
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 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 the outer cover being adapted 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 advantage of the invention is that：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 forms independent noise reduction cavity with the cooperation of noise reduction hole, volute tongue is allowd 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 present invention relates to a kind of range hood, more particularly, to a kind of wind turbine noise reduction spiral tougue.
Background technology
Main function for the wind turbine volute tongue of 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, so as to
From the point of view of on the direction of air outlet, recess portion is arc, although, by setting recess portion that can carry out rectification to air-flow herein, so as to
Noise caused by volute tongue portion when reducing kitchen ventilator work, but the lower face of the volute tongue and the gap size phase of impeller
Together, thus, easily generate whirlpool in the front and rear sides of volute tongue during blower fan work.For another example application No. is 201210210890.X (Shens
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, so as to make 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 rear 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, causes noise superposition 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 manufacture cost of volute tongue.
Invention content
The technical problems to be solved by the invention are present situations for the above-mentioned prior art, provide a kind of simple in structure, noise reduction
The good wind turbine noise reduction spiral tougue of effect.
Technical solution is used by the present invention solves above-mentioned technical problem：The wind turbine noise reduction spiral tougue includes volute tongue ontology,
It is characterized in that：The upper side of the volute tongue ontology and downside have been respectively formed on noise reduction cavity, are externally provided in the volute tongue ontology
The outer cover being adapted with volute tongue ontology, and be 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 between the guide face of the outer cover and backflow surface by the grouping teaching to smoothly transit.
In order to be adapted volute tongue denoising structure and the air velocity of volute tongue front and back end, 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 with impeller central disc corresponding position to the front and rear sides of volute tongue.
As a preferred embodiment, the noise reduction hole area S 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 certainly with impeller central disc corresponding position to the front and rear sides of volute tongue.
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 with impeller central disc corresponding position to the front and rear sides of volute tongue.
Preferably, the sectional area of the noise reduction cavity on same side is equal in magnitude, the drop on volute tongue ontology same side
Make an uproar chamber depth from being become larger with impeller central disc corresponding position to the front and rear sides of volute tongue.
Further preferably, noise reduction hole area S all on the outer cover is equal in magnitude.
As another preferred embodiment, the volume size of 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 certainly with impeller central disc corresponding position to the front and rear sides of volute tongue.
Preferably, the volute tongue ontology is an integral molding structure.
Compared with prior art, the advantage of the invention is that：The wind turbine noise reduction spiral tougue passes through the upper side in volute tongue ontology
With noise reduction cavity is formed on downside, be provided on the external outer cover of volute tongue sheet and the one-to-one noise reduction hole of noise reduction cavity, it is each to drop
Chamber of making an uproar forms independent noise reduction cavity with the cooperation of noise reduction hole so that and volute tongue can 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 of the drawings
Fig. 1 is the structure diagram of the embodiment of the present invention one；
Fig. 2 is the decomposition diagram of the embodiment of the present invention one；
Fig. 3 is the decomposition diagram of one another angle of the embodiment of the present invention；
Fig. 4 is the internal structure schematic diagram of the embodiment of the present invention one；
Fig. 5 is the noise reduction cavity sectional area change schematic diagram of the volute tongue ontology of the embodiment of the present invention one；
Fig. 6 is the blower fan structure schematic diagram for the volute tongue for being equipped with the embodiment of the present invention one；
Fig. 7 is the noise reduction hole change schematic diagram on the volute tongue outer cover of the embodiment of the present invention two；
Fig. 8 is the noise reduction cavity change in depth schematic diagram of the volute tongue ontology of the embodiment of the present invention three.
Specific embodiment
The present invention 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 21 of noise reduction cavity.In addition, the shunting between the guide face 22 of outer cover 2 and backflow surface 23 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 corresponding 21 area of noise reduction hole, V is noise reduction cavity volume, and L is 21 effective neck length of noise reduction hole.It is 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, so as 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, with reference to above-mentioned Helmholz resonance principle, 21 area S of noise reduction hole and corresponding 11 volume V of 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 in 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 certainly with 3 corresponding position of impeller central disc to the front and rear sides of volute tongue.
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 of noise reduction cavity 11 on side is equal in magnitude, the depth of the noise reduction cavity 11 on 1 same side of volute tongue ontology 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 with 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 (10)
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 the outer cover (2) being adapted 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) is with returning
It is mutually linked between stream interface (23) by the grouping teaching (24) to smoothly transit.
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 is equal in magnitude, the depth of the noise reduction cavity (11) on volute tongue ontology (1) same side 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, 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.
10. wind turbine noise reduction spiral tougue according to claim 1, it is characterised in that：The volute tongue ontology (1) is integrally formed knot
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711449597.8A CN108240357B (en) | 2017-12-27 | 2017-12-27 | Noise-reducing volute tongue of fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711449597.8A CN108240357B (en) | 2017-12-27 | 2017-12-27 | Noise-reducing volute tongue of fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108240357A true CN108240357A (en) | 2018-07-03 |
| CN108240357B CN108240357B (en) | 2024-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711449597.8A Active CN108240357B (en) | 2017-12-27 | 2017-12-27 | Noise-reducing volute tongue of fan |
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| CN (1) | CN108240357B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458736A (en) * | 2018-12-24 | 2019-03-12 | 广东美的白色家电技术创新中心有限公司 | Gas water-heater housing and gas heater |
| CN110925240A (en) * | 2019-09-13 | 2020-03-27 | 浙江理工大学上虞工业技术研究院有限公司 | Frequency-adjustable noise-reducing centrifugal ventilator and volute thereof |
| CN111096711A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Motor cover assembly and dust collector with same |
| CN111102247A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Amortization subassembly, centrifugal fan's spiral case subassembly, centrifugal fan and lampblack absorber |
| CN111096708A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Air outlet cover assembly of dust collector and dust collector with same |
| CN111255746A (en) * | 2018-11-30 | 2020-06-09 | 无锡小天鹅电器有限公司 | Volute air duct, fan assembly and clothes dryer |
| CN112460071A (en) * | 2021-01-26 | 2021-03-09 | 佛山市顺德区美的洗涤电器制造有限公司 | Noise-reduction volute tongue, volute, fan and range hood |
| US11002286B2 (en) * | 2018-05-04 | 2021-05-11 | Ningbo Fotile Kitchen Ware Co., Ltd. | Volute mechanism of a centrifugal fan |
| US11078927B2 (en) | 2018-08-29 | 2021-08-03 | Lenovo (Singapore) Pte Ltd | Electronic device having a fan |
| WO2023272928A1 (en) * | 2021-06-29 | 2023-01-05 | 广东美的制冷设备有限公司 | Centrifugal fan and air conditioner |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11002286B2 (en) * | 2018-05-04 | 2021-05-11 | Ningbo Fotile Kitchen Ware Co., Ltd. | Volute mechanism of a centrifugal fan |
| US11078927B2 (en) | 2018-08-29 | 2021-08-03 | Lenovo (Singapore) Pte Ltd | Electronic device having a fan |
| CN111096708B (en) * | 2018-10-25 | 2022-03-01 | 广东美的白色家电技术创新中心有限公司 | Air outlet cover assembly of dust collector and dust collector with same |
| CN111102247A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Amortization subassembly, centrifugal fan's spiral case subassembly, centrifugal fan and lampblack absorber |
| CN111096708A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Air outlet cover assembly of dust collector and dust collector with same |
| CN111096711A (en) * | 2018-10-25 | 2020-05-05 | 广东美的白色家电技术创新中心有限公司 | Motor cover assembly and dust collector with same |
| CN111096711B (en) * | 2018-10-25 | 2022-03-22 | 广东美的白色家电技术创新中心有限公司 | Motor cover assembly and dust collector with same |
| CN111102247B (en) * | 2018-10-25 | 2022-05-17 | 广东美的白色家电技术创新中心有限公司 | Amortization subassembly, centrifugal fan's spiral case subassembly, centrifugal fan and lampblack absorber |
| CN111255746A (en) * | 2018-11-30 | 2020-06-09 | 无锡小天鹅电器有限公司 | Volute air duct, fan assembly and clothes dryer |
| CN109458736A (en) * | 2018-12-24 | 2019-03-12 | 广东美的白色家电技术创新中心有限公司 | Gas water-heater housing and gas heater |
| CN110925240A (en) * | 2019-09-13 | 2020-03-27 | 浙江理工大学上虞工业技术研究院有限公司 | Frequency-adjustable noise-reducing centrifugal ventilator and volute thereof |
| CN112460071A (en) * | 2021-01-26 | 2021-03-09 | 佛山市顺德区美的洗涤电器制造有限公司 | Noise-reduction volute tongue, volute, fan and range hood |
| WO2023272928A1 (en) * | 2021-06-29 | 2023-01-05 | 广东美的制冷设备有限公司 | Centrifugal fan and air conditioner |
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| Publication number | Publication date |
|---|---|
| CN108240357B (en) | 2024-05-14 |
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