CN207795690U - A kind of guiding device for large axial flow fan - Google Patents
A kind of guiding device for large axial flow fan Download PDFInfo
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- CN207795690U CN207795690U CN201721741724.7U CN201721741724U CN207795690U CN 207795690 U CN207795690 U CN 207795690U CN 201721741724 U CN201721741724 U CN 201721741724U CN 207795690 U CN207795690 U CN 207795690U
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- air duct
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- guide shell
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Abstract
The utility model provides a kind of guiding device for large axial flow fan, successively by wind inlet section, diversion section and mainframe section three parts composition, wind inlet section includes air inlet and fan housing, diversion section includes the outer air duct of guide shell, inner conical-tube and the rectifying cover being connected to each other with inner conical-tube front end, mainframe section includes impeller motor, air duct in air duct and the host being connected with inner conical-tube outside the host being connected with air duct outside guide shell, diversion section further includes the first airfoil support part, for connecting air duct and inner conical-tube outside guide shell, mainframe section further includes the second airfoil support part, for connecting outside host air duct in air duct and host.The utility model uses aerofoil profile flow-guiding structure, prevents the generation of Karman vortex street, promotes the pneumatic efficiency of wind turbine, and ventilation effect is excellent, efficient, and vibration is low；The rigidity and intensity for also strengthening wind turbine simultaneously, meet the needs of fan safe reliability service, and improve the heat dissipation effect of impeller motor.
Description
Technical field
The utility model is related to wind turbine technical fields, and in particular to a kind of guiding device for large axial flow fan, it can
To prevent the generation of Karman vortex street.
Background technology
Wind turbine is mainly used for the ventilation of various places, and large capacity, high efficiency, low noise are the development sides of wind turbine technology
To.Large capacity, high efficiency, low-noise fan be mainly characterized by air quantity and pressure is larger, vibration it is smaller, along journey be lost it is relatively low,
Efficiency caused by unit volume is 1.1-1.2 times of common wind turbine.Therefore, air quantity and pressure, the reduction of wind turbine how to be improved
Vibration, reduction are primary research topics along journey loss.
The guiding device of large axial flow fan is to shadows such as the efficiency of entire wind turbine, structure, aeroperformance, vibration and maintenances
Sound is larger.When blower interior gas flows, causes flow direction to change after being impacted to barrier, effective dynamic pressure of gas is caused to reduce,
Vibration increases, and to generate Karman vortex street phenomenon, generates non-rational impact to impeller surface and in turn results in impeller failure, service life
It reduces.According to the engineering practice of domestic large axial flow fan technology, according to the own structural characteristics of large axial flow fan, design is full
The guiding device difficulty of the optimal aeroperformance of foot is larger, and it is always tired for how preventing the generation of Karman vortex street in gas flow paths
Around one of the key problem of technical staff.
Utility model content
For problems of the prior art, the utility model provides a kind of water conservancy diversion dress for large axial flow fan
It sets, using aerofoil profile flow-guiding structure, prevents from generating Karman vortex street in runner, force piece blade is avoided to be impacted by Karman vortex street
And damage and be even broken, the pneumatic efficiency of wind turbine is improved, ventilation effect is excellent, efficient, and vibration is low；Also strengthen wind simultaneously
The rigidity and intensity of machine, meet the needs of fan safe reliability service, and improve the heat dissipation effect of impeller motor.
To achieve the goals above, technical solution used by the utility model is：
A kind of guiding device for large axial flow fan is made of wind inlet section, diversion section and mainframe section three parts successively,
Wherein, wind inlet section includes air inlet and fan housing, diversion section include the outer air duct of guide shell, inner conical-tube and with before the inner conical-tube
Hold the rectifying cover that is connected to each other, mainframe section include impeller motor, the host being connected with the outer air duct of the guide shell outside air duct and
Air duct in the host being connected with the inner conical-tube, diversion section further includes the first airfoil support part, for connecting the guide shell
Outer air duct and the inner conical-tube, mainframe section further include the second airfoil support part, for connecting air duct and the master outside the host
Air duct in machine.
Preferably, the first airfoil support part air duct outside the guide shell is circumferentially uniformly distributed, accordingly, described
Two airfoil support parts air duct outside the host is circumferentially uniformly distributed.
Further, the first airfoil support part and the second airfoil support part are hollow airfoil support part, described
The periphery of first airfoil support part air duct outside the guide shell has opening, and the second airfoil support part is in the host
The periphery of outer air duct has opening.
Preferably, the first airfoil support part and the second airfoil support part are four, what composition eight interconnected
Vented cavity.
Further, diversion section is additionally provided with the water conservancy diversion tube stent welded together with air duct outside the guide shell, mainframe section
It is additionally provided with and is mounted on institute with the host rack that air duct is separately connected in air duct outside the host and the host, the impeller motor
It states on host rack, the water conservancy diversion tube stent and the host rack fix on the ground.
Further, the end of the outer air duct of the guide shell is welded with flange, and diversion section and mainframe section pass through flange and spiral shell
Bolt fastener closed butt joint.
Compared with prior art, it is had the beneficial effect that possessed by the utility model：（1）Using the first airfoil support part and
For two airfoil support parts as guiding device, aerofoil profile streamline construction will not make air-flow generate Karman vortex street phenomenon, avoid producing impeller
Raw non-rational impact；Eight are constituted in first airfoil support part and the second airfoil support part and inner conical-tube and host between air duct
Vented cavity forms independent ventilation and heat channel, and heat dissipation area is big, and it is wider to connect distribution face with air duct in host, strengthens pair
The heat dissipation effect of impeller motor.
（2）The guiding device of aerofoil profile streamline construction is relative to columnar stays structure and rectangular support structure, and axial dimension is more
It is long, improve the rigidity of structure and intensity of wind turbine entirety.
（3）The guiding device of aerofoil profile streamline construction so that runner is more smooth, smaller along journey loss, improves the whole of wind turbine
Body efficiency；Relative to columnar stays structure and rectangular support structure, the guiding device resistance of aerofoil profile streamline construction is smaller, to water conservancy diversion
The impact of device is smaller, and complete machine oscillation is smaller；Guiding device internal cavity space is larger, facilitates manual maintenance.
Description of the drawings
Fig. 1 is the internal structure schematic diagram of the utility model.
Specific implementation mode
As shown in Figure 1, the guiding device of the utility model is suitable for large-scale axial flow blower, mainly by wind inlet section, water conservancy diversion
Section and mainframe section three parts composition.Wherein, wind inlet section includes air inlet 1 and fan housing 2.Diversion section includes the outer air duct 3 of guide shell, interior
Cone cylinder 4 and rectifying cover 5, the outer air duct 3 of guide shell are connected with fan housing 2, and inner conical-tube 4 is located at the inside of air duct 3 outside guide shell, rectification
Lid 5 and the front end of inner conical-tube 4 are connected to each other.Mainframe section includes impeller motor 10, air duct 7 in the outer air duct 6 of host and host, outside host
Air duct 6 is connected with air duct outside guide shell 3, and air duct 7 is connected with inner conical-tube 4 in host.
Unlike the prior art, the diversion section of the application is additionally provided with the first airfoil support part 8, for connecting water conservancy diversion
The outer air duct 3 of cylinder and inner conical-tube 4, mainframe section are additionally provided with the second airfoil support part 9, for connecting outside host in air duct 6 and host
Air duct 7.First airfoil support part 8 circumferential direction of air duct 3 outside guide shell is uniformly distributed, and accordingly, the second airfoil support part 9 is along master
The circumferential direction of the outer air duct of machine 6 is uniformly distributed, it is preferable that the first airfoil support part 8 and the second airfoil support part 9 are four, i.e. phase
The angle of adjacent two airfoil support parts is 90 degree, further, the quantity and shape of the first airfoil support part and the second airfoil support part
Shape can make adjustment appropriate according to actual demand.
Further, the first airfoil support part 8 and the second airfoil support part 9 are hollow, what composition eight interconnected
Vented cavity.As gas channel, the periphery of the first air duct 3 outside guide shell of airfoil support part 8 has opening, the second aerofoil profile branch
There is the periphery of the air duct 6 outside host of support member 9 opening, outside air can pass in and out airfoil support part by above-mentioned opening.
Further, the diversion section of the application is additionally provided with water conservancy diversion tube stent 11, welds together with air duct outside guide shell 3 and is used for
It supports entire diversion section, mainframe section to be additionally provided with host rack 12, is separately connected, is used for air duct 7 in air duct outside host 6 and host
Support entire mainframe section.Impeller motor 10 is mounted on host rack 12, and water conservancy diversion tube stent 11 and host rack 12 are each attached to
On ground, ensure fan safe even running.The end of air duct 3 is welded with flange 13 outside guide shell, and diversion section and mainframe section are logical
Cross 14 closed butt joint of flange 13 and bolt fastener.
There are two gas flow paths using the large axial flow fan of the utility model guiding device, such as the arrow in Fig. 1
Shown in head, double solid arrow indicates that the main wind path of wind turbine, single dotted arrow indicate motor cooling air duct.
The main wind path of wind turbine：After impeller motor 10 starts, ambient atmos enter diversion section by air inlet 1 and fan housing 2, and inflow is led
The first airfoil support part 8 is bypassed when the outer cavity between air duct 3 and inner conical-tube 4 of flow cartridge, subsequently into mainframe section, is flowed into outside host
The second airfoil support part 9 is bypassed in air duct 6 and host when cavity between air duct 7, is then entered after the pressurization of movable vane wheel speedup
Next stage impeller or guiding device, most afterwards through expanding air duct outflow.In the main wind path of wind turbine, the first airfoil support part 8 and the second aerofoil profile
Support element 9, can be with optimization airflow route, to not will produce karman vortex in gas flow because of its unique streamline construction
Street will not form turbulent flow or vortex, reduce and be lost along journey, be effectively improved fan efficiency.
Motor cooling air duct：By air duct 7 in inner conical-tube 4, rectifying cover 5, host and the first airfoil support part 8 and second wing
Type support element 9 constitutes the cooling air duct structure of impeller motor, and ambient atmos are distributed in guide shell by the first airfoil support part 8
The opening of 3 periphery of outer air duct enters, and is flowed into the second airfoil support part 9 through 4 inside of inner conical-tube, then from the second airfoil support
Part 9 is distributed in the opening outflow of host 6 periphery of outer air duct, forms cycle, plays the role of cooling motor.The utility model will
First airfoil support part and the second airfoil support part are arranged to hollow-core construction, form independent ventilation and heat channel, constitute gas
Circulation loop, heat dissipation area is big, connect that distribution face is wider with air duct in host, strengthens the heat dissipation effect to impeller motor.
Embodiment described above is only that the preferred embodiment of technical solutions of the utility model is described, not pair
The scope of the utility model is defined, under the premise of not departing from the spirit of the design of the utility model, ordinary skill people
The various modifications and improvement, the claims that should all fall into the utility model that member makes the technical solution of the utility model are true
In fixed protection domain.
Claims (6)
1. a kind of guiding device for large axial flow fan is made of wind inlet section, diversion section and mainframe section three parts successively,
In, wind inlet section includes air inlet and fan housing, and diversion section includes the outer air duct of guide shell, inner conical-tube and the front end with the inner conical-tube
The rectifying cover being connected to each other, mainframe section include impeller motor, the outer air duct of the host being connected with the outer air duct of the guide shell and with
Air duct in the host that the inner conical-tube is connected, it is characterised in that：Diversion section further includes the first airfoil support part, for connecting
The outer air duct of guide shell and the inner conical-tube are stated, mainframe section further includes the second airfoil support part, for connecting air duct outside the host
With air duct in the host.
2. the guiding device according to claim 1 for large axial flow fan, it is characterised in that：The first aerofoil profile branch
Support member air duct outside the guide shell is circumferentially uniformly distributed, accordingly, the second airfoil support part air duct outside the host
Circumferentially it is uniformly distributed.
3. the guiding device according to claim 1 or 2 for large axial flow fan, it is characterised in that：First wing
Type support element and the second airfoil support part are hollow airfoil support part, and the first airfoil support part is outside the guide shell
There is the periphery of air duct opening, the periphery of the second airfoil support part air duct outside the host to have opening.
4. the guiding device according to claim 3 for large axial flow fan, it is characterised in that：The first aerofoil profile branch
Support member and the second airfoil support part are four, constitute eight vented cavities interconnected.
5. the guiding device according to claim 1 for large axial flow fan, it is characterised in that：Diversion section be additionally provided with
The water conservancy diversion tube stent that the outer air duct of the guide shell welds together, mainframe section are additionally provided with and air duct outside the host and the host
The host rack that interior air duct is separately connected, the impeller motor are mounted on the host rack, the water conservancy diversion tube stent and institute
Host rack is stated to fix on the ground.
6. the guiding device according to claim 5 for large axial flow fan, it is characterised in that：The guide shell exogenous wind
The end of cylinder is welded with flange, diversion section and mainframe section and passes through flange and bolt fastener closed butt joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721741724.7U CN207795690U (en) | 2017-12-14 | 2017-12-14 | A kind of guiding device for large axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721741724.7U CN207795690U (en) | 2017-12-14 | 2017-12-14 | A kind of guiding device for large axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207795690U true CN207795690U (en) | 2018-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721741724.7U Active CN207795690U (en) | 2017-12-14 | 2017-12-14 | A kind of guiding device for large axial flow fan |
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| CN (1) | CN207795690U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087339A (en) * | 2017-12-14 | 2018-05-29 | 卧龙电气集团股份有限公司 | A kind of guiding device for large axial flow fan |
-
2017
- 2017-12-14 CN CN201721741724.7U patent/CN207795690U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108087339A (en) * | 2017-12-14 | 2018-05-29 | 卧龙电气集团股份有限公司 | A kind of guiding device for large axial flow fan |
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