CN207750264U - Injection type centrifugal blower - Google Patents
Injection type centrifugal blower Download PDFInfo
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- CN207750264U CN207750264U CN201721801166.9U CN201721801166U CN207750264U CN 207750264 U CN207750264 U CN 207750264U CN 201721801166 U CN201721801166 U CN 201721801166U CN 207750264 U CN207750264 U CN 207750264U
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- 238000002347 injection Methods 0.000 title claims abstract description 24
- 239000007924 injection Substances 0.000 title claims abstract description 24
- 239000000203 mixture Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005094 computer simulation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model is related to a kind of injection type centrifugal blowers.The wind turbine includes mainly centrifugal fan, changeover portion air duct and nozzle three parts, and nozzle includes that section is made of with section by justifying a turn petal air duct sections rectangle turn circle air duct sections, is smoothly tightly connected between each section.It is characterized in that increasing by one section of changeover portion air duct and nozzle on the basis of conventional centrifugal wind turbine rectangular section exports so that air-flow is not disperseed when leaving impeller, and air-flow is more concentrated, VELOCITY DISTRIBUTION is more uniform；Wind turbine can be made radially out to have the air-flow of certain drift angle gradual to air duct outer wall is parallel in changeover portion air duct, avoid air-flow negative sequence harmonic from flowing, reduce flow resistance, reduce output flow loss；Nozzle tapered portion makes air velocity increase, and static pressure reduces, and can turn the static gas of petal a part of outside wall surface of air duct sections injection by justifying in section, to increase compressor flow under identical operating condition.
Description
Technical field
The utility model patent is related to a kind of injection type centrifugal blower, belongs 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 unreasonable import and export Duct design of centrifugal fan connection is to cause the weight that wind turbine is contributed, efficiency is relatively low
Want reason.Rational outlet conduits are not arranged for traditional centrifugal fan, and only a very short rectangular section air duct sections are made
For its outlet conduits, in the exit of blade, circumferentially the speed and pressure of air-flow are all non-uniform, the core in exit
Heart stream will will disperse, and reduce wind turbine air supplying distance, and the direction of air outlet velocity can also deviate preset direction, and air-flow is leaving rectangle section
Face export when direction will not vertical cross-section, have a certain amount of deflection angle to wind turbine center line.
Therefore, in order to solve the problems, such as that it is unreasonable that outlet conduits design, it is necessary to improve existing design, design one
The wind turbine of outlet conduits of the kind with transition zone for diversion and injection air-flow.
Utility model content
The purpose of this utility model is that in order to overcome the above-mentioned deficiencies of the prior art, design is a kind of to guide gas in exit
The injection type centrifugal blower for flowing Rational flow, increasing air output and stablizing core flow rate degree distribution.
The technical solution of the utility model is achieved in that the injection type centrifugal blower by centrifugal fan, changeover portion
Air duct and nozzle three parts composition；Wherein centrifugal fan is made of fan main body and fan outlet, and nozzle is by section by square
Shape turns circle air duct sections and is formed with section by justifying a turn petal air duct sections, and fan outlet connects transition by the tangent mode that seamlessly transits
Duan Fengdao, the changeover portion air duct other side are smoothly connected with nozzle.
The utility model is in traditional centrifugal fan rectangular section outlet arrangement changeover portion air duct and nozzle, nozzle packet
It includes section to be made of by justifying a turn petal air duct sections rectangle turn circle air duct sections and section, be smoothly tightly connected between each section.This
Sample is arranged such that air-flow is not disperseed when the rectangular section for leaving centrifugal blower exports, and air-flow is more concentrated, VELOCITY DISTRIBUTION is equal
It is even；Wind turbine can be made radially out to have the air-flow of certain drift angle gradual to air duct outer wall is parallel in changeover portion air duct, avoided
Air-flow negative sequence harmonic flows, and reduces flow resistance, reduces output flow loss；Nozzle air duct tapered portion makes air velocity
Increase, static pressure reduces, can be in the static gas of a part of outside wall surface of petal section injection, in identical operating condition
Lower increase compressor flow.
A kind of injection type centrifugal blower, it is characterised in that：The cross sectional shape and area in changeover portion air duct are constant, mistake
The path rule for crossing section air duct is two sections of tangent connections of circular arc, that section of circular arc and the fan outlet area close to fan outlet hang down
Directly, vertical with nozzle inlet section close to that section of circular arc of nozzle；The outlet in changeover portion air duct is flat with fan outlet area
Row.The main function designed in this way is that wind turbine is made radially out to have the air-flow of certain drift angle gradual to air duct outer wall is parallel to, and is kept away
Exempt from the flowing of air-flow negative sequence harmonic, reduce flow resistance, reduces output flow loss.
A kind of injection type centrifugal blower, it is characterised in that：Nozzle cross-section is turned the section shape of circle air duct sections by rectangle
Shape is gradually changed from rectangle to circle, and the area of rectangular section is equal with circular cross-sectional area.The main function designed in this way is
Keep VELOCITY DISTRIBUTION of the air-flow on duct cross-section more uniform, is not in the phenomenon that mutually extruding between streamline, is next section
Transitional function is played in the flowing in air duct.
A kind of injection type centrifugal blower, it is characterised in that：Latter section of duct cross-section of nozzle turns petal wind by justifying
For the cross sectional shape in road gradually from circle to petal change in shape, the area of circular cross-section is equal with petal tee section；It is petal
The every petal center line in shape section is equal with the angle that adjacent petal center line surrounds.The main function designed in this way is
Air duct tapered portion can make air velocity increase, and static pressure reduces, can be in a part of static gas of outside wall surface injection.
A kind of injection type centrifugal blower, it is characterised in that：The height of the every petal in petal shape section with most
The ratio of wide director's degree is classified as 1-1.5.Design can allow centrifugal fan to increase compressor flow under identical operating condition in this way.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of injection type centrifugal blower of the utility model patent；
Fig. 2 is a kind of planar structure schematic diagram of injection type centrifugal blower of the utility model patent；
Fig. 3 is the planar structure schematic diagram that nozzle is connected with changeover portion air duct；
Fig. 4 is the structural schematic diagram of nozzle petal tee section；
The structural schematic diagram of Fig. 5 nozzles, wherein（a）Nozzle graphics,（b）Nozzle side view,（c）Nozzle exit is just
View；
The contoured velocity figure in Fig. 6 jet expansions flow field（Ratio is 1）.
The contoured velocity figure in Fig. 7 jet expansions flow field（Ratio is 1.5）.
Figure label title：1- wind turbines；2- changeover portions air duct；3- nozzles；11- fan main bodies；12- fan outlets；The roads 21-
Radial line；The sections 31- turn circle air duct sections by rectangle；The sections 32- turn petal air duct sections by justifying；The flower in 321- petal shapes section
Valve；Region between 322- two panels petals；The height of 3211- petals；The length of 3212- petal the widest part；Two adjacent flowers of 323-
The angle of valve center line
Specific implementation method
The utility model is further illustrated below in conjunction with the accompanying drawings.
It please refers to shown in attached Fig. 1 and 2, a kind of injection type centrifugal blower is by centrifugal fan 1, changeover portion air duct 2 and nozzle 3
Three parts form.Centrifugal fan 1 is made of fan main body 11 and fan outlet 12, and nozzle 3 is to turn circle wind by rectangle by section
Road section 31 and section are formed by justifying a turn petal air duct sections 32, and each section is smoothly tightly connected.Fan outlet 12 is by mutually cutting flat with
Sliding transient mode connection changeover portion air duct 2,2 other side of changeover portion air duct is smoothly connected with nozzle 3.Please
Shown in attached drawing 3, the changes of section path-line 21 in changeover portion air duct 2, the changing rule of this line is by two circular arcs
Tangent connection composition, that section of circular arc close to fan outlet 12 is vertical with fan outlet area, close to nozzle 3 that section of circular arc and
Nozzle inlet section is vertical.
It please refers to shown in attached drawing 4,321 center line of every petal in petal shape section and adjacent 321 center line of petal
The angle of the angle 323 surrounded is equal, and the ratio of the height 3211 of petal 321 and the length 3212 of the widest part is 1-1.5.
Special changeover portion air duct 2 and nozzle 3, the air-flow being inhaled by wind turbine axial entrance are installed in wind turbine air-supply outlet
Radially away from impeller after impeller does work, changeover portion air duct 2, this section of air duct are flow in wind turbine rectangular section outlet 12
Effect be script dispersion with have the air-flow of certain deflection angle gradual to 2 outer wall of changeover portion air duct is parallel to, make air-flow more
Concentration, VELOCITY DISTRIBUTION are more uniform, and negative sequence harmonic is avoided to flow, its is made to reduce flow resistance, reduce output flow loss.When
Air-flow flow to section by justify turn petal air duct sections 32 when, the speed of 321 interior air-flow of region of the every petal in petal shape section
Degree increases, and static pressure reduces, can be with region 322 of the injection part between two panels petal, the i.e. static gas of 3 outside wall surface of nozzle
Body, to increase the flow of gas compared with conventional fan under identical operating condition.
Computer simulation experimental verification
Numerical simulation is the powerful of Study of Fluid flowing, and many research institutions are in a new construction or new technology beforehand research
Stage all can carry out numerical simulation study to the new construction or new technology.Numerical simulation can utilize Fluid Mechanics Computation to wind turbine
The simulation of Complex Flows problem calculate, fluid motion equation is solved by numerical discretization, discloses wind turbine flow mechanism and flowing
Rule.
It is obtained by Numerical Experiment method validation：Nozzle designed by the utility model is cut relative to traditional rectangle
Face exports, the flowing velocity with bigger, farther range, more uniform VELOCITY DISTRIBUTION, more stable core flow.For
Two groups of different every petal height of nozzle petal tee section are emulated with the widest part lenth ratio, study designed nozzle pair
Flow improved effect.The ratio of two groups of different petal height and the widest part length is respectively 1 and 1.5.
Following setting is done to boundary condition in fluent softwares：Fluid selects incompressible air, nozzle inlet to cut
Face uses speed import, inlet velocity 6m/s identical as the air-supply average speed of certain conventional fan rectangular section outlet；To spray
1m other than mouth outlet3Space in fluid flowing carry out numerical simulation, reference pressure 1atm；Nozzle wall surface is set as smooth no cunning
Move wall surface.
To 1m other than jet expansion3Space middle section velocity field analyzed, obtained result is as shown in Figure 6 and Figure 7,
Analog result when wherein Fig. 6 is petal height and the ratio of the widest part length is 1, Fig. 7 are petal height and the widest part length
Ratio be 1.5 when analog result.The distribution situation that jet expansion flow field velocity is considered using flow velocity 0.5m/s as boundary, by scheming
6 and velocity field isogram shown in Fig. 7 can be seen that jet expansion flow uniformity mutually less nozzle be more preferable, novel spraying
Mouth also can have Involving velocity to fluid in flow field around.Nozzle core velocity flow profile is uniform, it can thus be appreciated that air-flow is leaving impeller
When do not disperseed, air-flow is more concentrated, VELOCITY DISTRIBUTION is more uniform.
Claims (5)
1. a kind of injection type centrifugal blower, it is characterised in that：
The injection type centrifugal blower is by centrifugal fan（1）, changeover portion air duct（2）And nozzle（3）Three parts form；Wherein centrifuge
Formula wind turbine（1）By fan main body（11）And fan outlet（12）Composition, nozzle（3）It is that circle air duct sections are turned by rectangle by section（31）
Turn petal air duct sections by justifying with section（32）Composition, fan outlet（12）Changeover portion wind is connected by the tangent mode that seamlessly transits
Road（2）, changeover portion air duct（2）The other side and nozzle（3）It is smoothly connected.
2. injection type centrifugal blower according to claim 1, it is characterised in that：
The changeover portion air duct（2）Cross sectional shape and area it is constant, changeover portion air duct（2）Section path rule be two sections
The tangent connection of circular arc, close to fan outlet（12）That section of circular arc it is vertical with fan outlet area, close to nozzle（3）That section circle
Arc and nozzle（3）Import section is vertical；Changeover portion air duct（2）Outlet and fan outlet（12）Section is parallel.
3. injection type centrifugal blower according to claim 1, it is characterised in that：
The nozzle cross-section turns circle air duct sections by rectangle（31）Cross sectional shape gradually from rectangle to circle change, rectangular section
Area is equal with circular cross-sectional area.
4. injection type centrifugal blower according to claim 1, it is characterised in that：
The nozzle cross-section turns petal air duct sections by justifying（32）Cross sectional shape gradually from circle to petal change in shape, circle
The area of tee section is equal with petal tee section；The every petal in petal shape section（321）Center line and adjacent petal
（321）The angle that center line surrounds is equal.
5. injection type centrifugal blower according to claim 4, it is characterised in that：
The every petal in the petal shape section（321）Height and the widest part length ratio be 1-1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721801166.9U CN207750264U (en) | 2017-12-21 | 2017-12-21 | Injection type centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721801166.9U CN207750264U (en) | 2017-12-21 | 2017-12-21 | Injection type centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207750264U true CN207750264U (en) | 2018-08-21 |
Family
ID=63149339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721801166.9U Expired - Fee Related CN207750264U (en) | 2017-12-21 | 2017-12-21 | Injection type centrifugal blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207750264U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087303A (en) * | 2017-12-21 | 2018-05-29 | 南京航空航天大学 | Injection type centrifugal blower |
| CN111001110A (en) * | 2020-01-10 | 2020-04-14 | 福州高新区玲富科技有限公司 | Dedicated automatic fire extinguishing device in distribution room |
-
2017
- 2017-12-21 CN CN201721801166.9U patent/CN207750264U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087303A (en) * | 2017-12-21 | 2018-05-29 | 南京航空航天大学 | Injection type centrifugal blower |
| CN111001110A (en) * | 2020-01-10 | 2020-04-14 | 福州高新区玲富科技有限公司 | Dedicated automatic fire extinguishing device in distribution room |
| CN111001110B (en) * | 2020-01-10 | 2020-07-31 | 韶关市鸿杰电力安装工程有限公司 | Dedicated automatic fire extinguishing device in distribution room |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 |