CN210371247U - High-efficient back bend centrifugal fan - Google Patents
High-efficient back bend centrifugal fan Download PDFInfo
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- CN210371247U CN210371247U CN201920934071.7U CN201920934071U CN210371247U CN 210371247 U CN210371247 U CN 210371247U CN 201920934071 U CN201920934071 U CN 201920934071U CN 210371247 U CN210371247 U CN 210371247U
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- Prior art keywords
- centrifugal fan
- blade
- air inlet
- spiral case
- shaft cover
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- 238000000034 method Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a high-efficient back bend centrifugal fan, including spiral case, shaft cover, rim plate and a plurality of blade, be provided with the air inlet on the outer panel of spiral case, the shape of air inlet is the awl arc, the shaft cover is installed the spiral case is kept away from one side of air inlet, the rim plate with bolted connection between the shaft cover, blade fixed mounting be in the periphery of rim plate, the shape of blade is single arc, still be provided with the gas outlet on the spiral case. This high-efficient back bend centrifugal fan gets the blade through conical arc's air inlet and single arc, very big improvement the efficiency for the efficiency promotes to more than 83%, and overall structure is compact simultaneously, and the installation is reasonable.
Description
Technical Field
The utility model relates to a technical field of ventilation blower especially relates to a high-efficient back bend centrifugal fan.
Background
The ventilator is a machine which increases the pressure of gas and discharges the gas by means of input mechanical energy, and is a driven fluid machine. The exhaust pressure is lower than 1.5 x 10^4 Pa. Modern ventilators are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and draught of boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household electrical appliances, drying and sorting of grains, wind tunnel wind sources and inflation and propulsion of air cushion boats, and the like.
In the existing backward centrifugal ventilator, the energy efficiency is only 65% -75%, and 83% of the first-level energy efficiency cannot be achieved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at: the utility model provides a high-efficient back-bending centrifugal fan, this high-efficient back-bending centrifugal fan get the blade through the air inlet of awl curved shape and single arc, very big improvement the efficiency for the efficiency promotes to more than 83%, and overall structure is compact simultaneously, and the installation is reasonable.
To achieve the purpose, the utility model adopts the following technical proposal: the utility model provides a high-efficient back bend centrifugal fan, includes spiral case, shaft cover, rim plate and a plurality of blade, be provided with the air inlet on the outer panel of spiral case, the shape of air inlet is the awl arc, the shaft cover is installed the spiral case is kept away from one side of air inlet, the rim plate with bolted connection between the shaft cover, blade fixed mounting be in the periphery of rim plate, the shape of blade is single arc, still be provided with the gas outlet on the spiral case.
As a preferred technical solution, the inlet width of the blade is 1.18 times the outlet width of the blade.
As a preferred technical solution, the inner wall line of the volute is a spiral line made according to the inequilateral method.
As a preferable technical scheme, the outlet installation angle of the blade is any degree between 35 degrees and 45 degrees.
As a preferable technical scheme, the outlet installation angle of the blade is any degree between 18 degrees and 25 degrees.
As a preferable technical scheme, the degree of the inlet installation angle of the blade is any degree between 35 degrees and 45 degrees.
As a preferred technical solution, the inner wall line of the volute is a spiral line made according to the inequilateral method.
The utility model has the advantages that: the utility model provides a high-efficient back-bending centrifugal fan, this high-efficient back-bending centrifugal fan get the blade through the air inlet of awl curved shape and single arc, very big improvement the efficiency for the efficiency promotes to more than 83%, and overall structure is compact simultaneously, and the installation is reasonable.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and examples.
FIG. 1 is a schematic view of a disk and blade assembly according to an embodiment;
FIG. 2 is a schematic view of a combined structure of a shaft cover, a wheel disc and a blade according to the first embodiment;
FIG. 3 is a schematic structural diagram of a volute according to the first embodiment;
fig. 4 is a schematic structural diagram of an outer side plate of the scroll casing according to the first embodiment.
In fig. 1 to 4:
1. a volute; 2. a shaft cover; 3. a wheel disc; 4. a blade; 5. an air inlet; 6. an air outlet; 7. an outlet mounting angle; 8. and (6) an inlet mounting angle.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1 to 4, in this embodiment, a high-efficiency backward-bending centrifugal fan includes a volute 1, a shaft cover 2, a wheel disc 3 and a plurality of blades 4, an air inlet 5 is provided on an outer side plate of the volute 1, the air inlet 5 is in the shape of a conical arc, the shaft cover 2 is installed on one side of the volute 1 away from the air inlet 5, the wheel disc 3 is connected with the shaft cover 2 through bolts, the blades 4 are fixedly installed on the periphery of the wheel disc 3, the blades 4 are in the shape of a single circular arc, and an air outlet 6 is further provided on the volute 1.
Wherein the inlet width (b 1 in the figure) of the vane 4 is 1.18 times of the outlet width (b 2 in the figure) of the vane 4.
Specifically, the inner wall line of the volute 1 is a spiral line manufactured according to a scalene base method.
By taking a =240mm and R =500mm as an example, the mapping method of the inequilateral base method: 4 squares with different side lengths are adopted, a =0.15A, b =0.1333A, c =0.1167A, d =0.1A, and the radiuses of the 4 circular arcs are respectively R4= R + A-a, R3= R + (6/8) A-b, R2= R + (4/8) A-c, and R1= R + (2/8) A-d.
In the present embodiment, the outlet setting angle 7 of the vane 4 is 35 °.
In the present embodiment, the inlet setting angle 8 of the blade 4 is 35 °.
Example two:
the difference between this embodiment and the first embodiment is:
in the present embodiment, the outlet setting angle 7 of the vane 4 is 45 °.
Example three:
the difference between this embodiment and the first embodiment is:
in the present embodiment, the outlet setting angle 7 of the vane 4 is 40 °.
Example four:
the difference between this embodiment and the first embodiment is:
in the present embodiment, the inlet setting angle 8 of the blade 4 is 45 °.
Example five:
the difference between this embodiment and the first embodiment is:
in the present embodiment, the inlet setting angle 8 of the blade 4 is 40 °.
Example six:
the difference between this embodiment and the first embodiment is:
in the present embodiment, the outlet setting angle 7 of the vane 4 is 18 °.
Example seven:
the difference between this embodiment and the first embodiment is:
in the present embodiment, the outlet setting angle 7 of the vane 4 is 25 °.
Example eight:
the difference between this embodiment and the first embodiment is:
in the present embodiment, the outlet setting angle 7 of the vane 4 is 21 °.
It should be noted that the above embodiments are only preferred embodiments of the present invention and the technical principles applied, and any changes or substitutions which can be easily conceived by those skilled in the art within the technical scope of the present invention are covered by the protection scope of the present invention.
Claims (7)
1. The utility model provides a high-efficient back bend centrifugal fan, its characterized in that, includes spiral case, shaft cover, rim plate and a plurality of blade, be provided with the air inlet on the outer panel of spiral case, the shape of air inlet is the awl arc, the shaft cover is installed the spiral case is kept away from one side of air inlet, the rim plate with bolted connection between the shaft cover, blade fixed mounting be in the periphery of rim plate, the shape of blade is single arc, still be provided with the gas outlet on the spiral case.
2. A high efficiency backward-curved centrifugal fan as claimed in claim 1, wherein the inlet width of the vanes is 1.18 times the outlet width of the vanes.
3. A high efficiency backward-curved centrifugal fan according to claim 1, wherein the inner wall of the scroll casing is formed in a spiral line shape made according to a inequilateral method.
4. A high efficiency backward-curved centrifugal fan according to claim 1, wherein the outlet setting angle of the blades is any number of degrees between 35 ° and 45 °.
5. A high efficiency backward-curved centrifugal fan as claimed in claim 1, wherein the outlet setting angle of the vanes is any number of degrees between 18 ° and 25 °.
6. A high efficiency backward-curved centrifugal fan as claimed in claim 1, wherein the inlet setting angle of the blades is any number of degrees between 35 ° and 45 °.
7. A high efficiency backward-curved centrifugal fan according to claim 1, wherein the inner wall of the scroll casing is formed in a spiral line shape made according to a inequilateral method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920934071.7U CN210371247U (en) | 2019-06-20 | 2019-06-20 | High-efficient back bend centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920934071.7U CN210371247U (en) | 2019-06-20 | 2019-06-20 | High-efficient back bend centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210371247U true CN210371247U (en) | 2020-04-21 |
Family
ID=70266011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920934071.7U Expired - Fee Related CN210371247U (en) | 2019-06-20 | 2019-06-20 | High-efficient back bend centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210371247U (en) |
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2019
- 2019-06-20 CN CN201920934071.7U patent/CN210371247U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Workshop A1, Guangdong Luosen Ventilation Equipment Manufacturing Co., Ltd., No. 6 Desheng Road, Industrial Park, Chengdong Neighborhood Committee, Decheng Street, Deqing County, Zhaoqing City, Guangdong Province, 526600 Patentee after: Guangdong East Ventilation Fan Co.,Ltd. Address before: 523000 No. 2, Sha Wang Road, Hongwu vortex village, Hongmei Town, Dongguan, Guangdong. Patentee before: DONGGUAN GUOTONG VENTILATION EQUIPMENT CO.,LTD. |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200421 |