CN108799203A - Without back-pressure flush type density current wind-engaging element - Google Patents
Without back-pressure flush type density current wind-engaging element Download PDFInfo
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- CN108799203A CN108799203A CN201810608126.5A CN201810608126A CN108799203A CN 108799203 A CN108799203 A CN 108799203A CN 201810608126 A CN201810608126 A CN 201810608126A CN 108799203 A CN108799203 A CN 108799203A
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- Prior art keywords
- fan housing
- wind
- fan
- engaging
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- 239000000203 mixture Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- 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
-
- 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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of no back-pressure flush type density current wind-engaging elements.The element includes mainly by two fan housing, wind turbine parts, it is in integrally bottomless bowl-shape shape by fan housing, and wall surface is smooth surface, it is wherein rounded by air port and inlet scoop section, it is more than by fan housing inlet scoop area by fan housing wind-engaging open area, it is fitted closely with fans entrance seamless, is installed at the air outlet of wind turbine by fan housing inlet scoop.It is characterized in that the air inlet in wind turbine adds one by fan housing so that preferably polymerize from external core flow and suck in wind turbine, due to being in certain radian by fan housing, air-flow is fitted closely with wind-engaging cover wall face to be avoided generating back-pressure.
Description
Technical field
The present invention relates to a kind of no back-pressure flush type density current wind-engaging elements, belong to centrifugal blower technical field.
Background technology
With the continuous development of fan industry, up to the present, wind turbine is widely used in every field, each Ministry of Industry
Door.On the market, centrifugal fan and axial fan are using most commonly seen.The former be primarily adapted for use in small flow, high pressure field
Institute, and the latter be primarily adapted for use in big flow, low-pressure environment in.Centrifugal fan at work, air-flow by wind turbine it is axial into
Enter blade space, driven by blade, radially away from impeller, wind turbine is left by the outlet conduits of design.
The import Duct design of centrifugal fan is unreasonable, is a major reason for causing wind turbine to generate back-pressure.Tradition
Centrifugal fan be not arranged by fan housing, mainstream air-flow can not be sucked well, can cause instead sucking air-flow in mix
More extraneous airs, therefore add one at air inlet and enabled to polymerize from external mainstream air-flow by fan housing
And the generation that back-pressure effect is avoided in sucking wind turbine is fitted closely with wind-engaging cover hydraulically smooth surface.
In order to solve the problems, such as fans entrance back-pressure, it is necessary to improve existing design, devise a kind of band wind-engaging
The element of cover and nested type transition outlet.
Invention content：
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, it is interior that design one kind enables to outer core stream to be close to
Wall flows into wind turbine and the element without back-pressure, more preferable sucking outer core stream at fans entrance.
This is formed without back-pressure flush type density current wind-engaging element by centrifugal fan, by fan housing two parts；Wherein, centrifugal wind
Machine is made of fan main body, fans entrance and fan outlet, by fan housing by wall surface, by fan housing wind-engaging mouth, by fan housing inlet scoop group
At；It is equal with Air Inlet of Centrifugal Fan area of section by fan housing inlet scoop area of section, and by fan housing inlet scoop and centrifugal wind
Machine entrance fits closely, and is seamlessly connected；Described is in bottomless bowl structure by fan housing, and wall surface surrounding is smooth surface, by fan housing
By air port diameter of section d with by fan housing inlet scoop diameter of section D, radius ratio D/d is 1.5-2, by fan housing height H with by fan housing by
Air port diameter of section d ratios H/d be 0.75-1, wall radius R with by fan housing wind-engaging mouth diameter of section d ratios R/d be 1.5-2.
Described to be filled shape by fan housing for bottomless bowl, this design can make outer core stream more preferably suck wind turbine, reduce in wind-engaging
The pressure loss in cover, and in inlet scoop same circumference, area of section is maximum.Wall surface surrounding is smooth surface, is avoided
It is leaked out by fan housing.It is 1.5-2, D/d by fan housing wind-engaging mouth diameter of section d and by fan housing inlet scoop diameter of section D, radius ratio D/d
Excessive external air flow can be sucked more than 2, reduces detection precision, and D/d is less than 1.5 and cannot all suck outer core stream.
It is 0.75-1 by fan housing height H and by fan housing wind-engaging mouth diameter of section d ratios H/d, H/d is more than 1 cannot be fully embedded by fan housing
Shell, being less than 0.75 by fan housing H/d cannot all suck outer core stream.Wall radius R with by fan housing wind-engaging mouth
Diameter of section d ratios R/d is 1.5-2, and R/d will appear back-pressure more than 2 in by fan housing, R/d cannot be by outer core less than 1.5
Stream all suckings.
It is described without back-pressure flush type density current wind-engaging element, it is characterised in that：At by fan housing wind-engaging mouth, on fan shaft
Deflection cone can be also installed；The deflection cone is in cone shape, water conservancy diversion cone height h and by fan housing wind-engaging mouth（21）Diameter of section
D ratios h/d be 0.5-0.86, bottom surface radius r with by fan housing wind-engaging mouth diameter of section d ratios r/d be 0.4-0.6, taper angle theta be 30 °-
45°。
The deflection cone is 0.5- in cone shape, water conservancy diversion cone height h and by fan housing wind-engaging mouth diameter of section d ratios h/d
0.86, taper angle theta, which is 30 ° of -45 ° of h/d, can influence outer core stream more than 0.86 by fan housing, and h/d, which is less than 0.58, to be reduced
The pressure loss of wind turbine；θ, which is more than 45 °, can cause bottom surface radius excessive, can not install, and θ is less than 30 ° of pressure that cannot reduce wind turbine
Loss.Bottom surface radius r be 0.4-0.6 by fan housing wind-engaging mouth diameter of section d ratios r/d, r/d, which is more than, 0.6 can not install, and r/d is small
In the pressure loss that 0.4 cannot reduce wind turbine.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of no back-pressure flush type density current wind-engaging element of the present invention；
Fig. 2 is a kind of planar structure schematic diagram of no back-pressure flush type density current wind-engaging element of the present invention；
Fig. 3 is the structural schematic diagram by fan housing, wherein（a）By fan housing graphics,（b）By fan housing front view；
Fig. 4 is the front view of deflection cone；
Figure label title：1, centrifugal fan, 11, fan main body, 12, fans entrance, 12, fan outlet, 2, by fan housing,
21, wall surface, 22, by fan housing wind-engaging mouth, 23, by fan housing inlet scoop.
Specific implementation method
Fig. 1 is schematic structural view of the invention, and the course of work of system is illustrated referring to Fig. 1.
This is formed without back-pressure flush type density current wind-engaging element by centrifugal fan 1, by 2 two parts of fan housing.Wherein, centrifugal
Wind turbine 1 is made of fan main body 11, fans entrance 12 and fan outlet 13, by fan housing 2 by wall surface 21, by fan housing wind-engaging mouth 22,
It is formed by fan housing inlet scoop 23.By fan housing inlet scoop 23 and the seamless close connection of fans entrance 12.
It is in bottomless bowl structure by fan housing, wall surface surrounding is smooth seamless, and is in certain radian, and that designs in this way is main
Effect is that wind turbine is made preferably to suck from the external core flow for injecting fans entrance, reduces the unrelated of sucking fans entrance surrounding
Air-flow improves accuracy of detection, and fans entrance is avoided to generate back-pressure phenomenon.
Example one is 40mm by fan housing wind-engaging mouth diameter of section d, is 60mm by fan housing inlet scoop diameter of section D, by fan housing height
Degree H is 30mm, and wall radius R 60mm, water conservancy diversion cone height h are 20mm, and bottom surface radius r is 20mm, and taper angle theta is 45 °.?
Fan outlet connects sensor, which can detect petrol molecule, such as by air-flow in contain petrol molecule, then sensor
Alarm.Gasoline bottle is opened in appropriate location in the middle part of core flow flow field, at this point, outer core stream blends petrol molecule, fluid-mixing
It is subjected to fan housing sucking wind turbine, through fan outlet flow sensor after, sensor alarm is rung at this time.Above-mentioned experiment ten times is repeated,
Alarm has nine alarms, Success in Experiment.
Example two is 60mm by fan housing wind-engaging mouth diameter of section d, is 1200mm by fan housing inlet scoop diameter of section D, by fan housing
Height H is 60mm, and wall radius R 120mm, water conservancy diversion cone height h are 51.6mm, and bottom surface radius r is 30mm, and taper angle theta is
30 °, equipment works well in this case.Sensor is connected in fan outlet, which can detect petrol molecule, as by
Contain petrol molecule in air-flow, then sensor alarm.Gasoline bottle is opened in a suitable position, outer core stream blends petrol molecule
When, core flow is subjected to fan housing sucking wind turbine, and through fan outlet flow sensor after, sensor alarm is rung at this time.It repeats above-mentioned
Experiment ten times, alarm have ten alarms, Success in Experiment.
Claims (2)
1. a kind of no back-pressure flush type density current wind-engaging element, it is characterised in that：
This is without back-pressure flush type density current wind-engaging element by centrifugal fan（1）, by fan housing（2）Two parts form；Wherein, centrifugal
Wind turbine（1）By fan main body（11）, fans entrance（12）And fan outlet（13）Composition, by fan housing（2）By wall surface（21）, wind-engaging
Cover is by air port（22）, by fan housing inlet scoop（23）Composition；By fan housing inlet scoop（22）Area of section and Air Inlet of Centrifugal Fan
（12）Area of section is equal, and by fan housing inlet scoop（22）With Air Inlet of Centrifugal Fan（12）It fits closely, is seamlessly connected；
It is described by fan housing（2）In bottomless bowl structure, wall surface surrounding is smooth surface, by fan housing wind-engaging mouth（21）Diameter of section
D with by fan housing inlet scoop（22）Diameter of section D, radius ratio D/d are 1.5-2, by fan housing height H and by fan housing wind-engaging mouth（21）It cuts
Face diameter d ratios H/d be 0.75-1, wall radius R with by fan housing wind-engaging mouth（21）Diameter of section d ratios R/d is 1.5-2.
2. no back-pressure flush type density current wind-engaging element according to claim 1, it is characterised in that：
By fan housing wind-engaging mouth（22）Locate, deflection cone is also equipped on fan shaft（3）；The deflection cone（3）In cone
Shape, water conservancy diversion cone height h with by fan housing wind-engaging mouth（21）Diameter of section d ratios h/d be 0.5-0.86, bottom surface radius r with by fan housing by
Air port（21）Diameter of section d ratios r/d is 0.4-0.6, and taper angle theta is 30 ° -45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810608126.5A CN108799203B (en) | 2018-06-13 | 2018-06-13 | Non-back pressure embedded heavy-current wind-receiving element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810608126.5A CN108799203B (en) | 2018-06-13 | 2018-06-13 | Non-back pressure embedded heavy-current wind-receiving element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108799203A true CN108799203A (en) | 2018-11-13 |
| CN108799203B CN108799203B (en) | 2024-03-19 |
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ID=64085719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810608126.5A Active CN108799203B (en) | 2018-06-13 | 2018-06-13 | Non-back pressure embedded heavy-current wind-receiving element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108799203B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2213248Y (en) * | 1994-10-22 | 1995-11-22 | 华南理工大学 | Glass fibre reinforced plastic centrifugal fan |
| CN201854141U (en) * | 2010-11-16 | 2011-06-01 | 安徽皖南电机股份有限公司 | Air hood of closed heat dissipation system outside motor |
| CN105090119A (en) * | 2015-09-01 | 2015-11-25 | 广东美的制冷设备有限公司 | Volute, whirl blower provided with volute, and air conditioner provided with volute |
| CN206478732U (en) * | 2016-12-02 | 2017-09-08 | 杭州大湛机电科技有限公司 | A kind of integral type air channel structure efficiently blown |
| CN206694183U (en) * | 2017-04-14 | 2017-12-01 | 上海理工大学 | A kind of electric generator driven by weak wind |
| CN208686652U (en) * | 2018-06-13 | 2019-04-02 | 南京航空航天大学 | Without back-pressure flush type density current wind-engaging element |
-
2018
- 2018-06-13 CN CN201810608126.5A patent/CN108799203B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2213248Y (en) * | 1994-10-22 | 1995-11-22 | 华南理工大学 | Glass fibre reinforced plastic centrifugal fan |
| CN201854141U (en) * | 2010-11-16 | 2011-06-01 | 安徽皖南电机股份有限公司 | Air hood of closed heat dissipation system outside motor |
| CN105090119A (en) * | 2015-09-01 | 2015-11-25 | 广东美的制冷设备有限公司 | Volute, whirl blower provided with volute, and air conditioner provided with volute |
| CN206478732U (en) * | 2016-12-02 | 2017-09-08 | 杭州大湛机电科技有限公司 | A kind of integral type air channel structure efficiently blown |
| CN206694183U (en) * | 2017-04-14 | 2017-12-01 | 上海理工大学 | A kind of electric generator driven by weak wind |
| CN208686652U (en) * | 2018-06-13 | 2019-04-02 | 南京航空航天大学 | Without back-pressure flush type density current wind-engaging element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108799203B (en) | 2024-03-19 |
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