CN102720702A - Fan provided with double-blade impeller - Google Patents
Fan provided with double-blade impeller Download PDFInfo
- Publication number
- CN102720702A CN102720702A CN2012101691652A CN201210169165A CN102720702A CN 102720702 A CN102720702 A CN 102720702A CN 2012101691652 A CN2012101691652 A CN 2012101691652A CN 201210169165 A CN201210169165 A CN 201210169165A CN 102720702 A CN102720702 A CN 102720702A
- Authority
- CN
- China
- Prior art keywords
- impeller
- blade
- fan
- motor
- blades
- 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.)
- Pending
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a fan provided with a double-blade impeller. The fan comprises a fan shell, a motor and an impeller, wherein the rear end of the fan shell is provided with the motor; the impeller is arranged in the fan shell and is connected with an output shaft of the motor; the impeller comprises a front cover plate, a rear cover plate and first blades; a plurality of first blades are arranged between the front cover plate and the rear cover plate in an annular array; and a plurality of second blades are arranged on the rear surface of the rear cover plate in an annular array. By the fan provided with the double-blade impeller, to-be-exhausted gas which is positioned between the rear cover plate of the impeller and the shell can participate in the airflow exhaust circulation process, the phenomenon that corrosive gas required to be exhausted is retained in the fan shell for a long time so as to corrode the impeller and the fan shell is avoided, and the service life of the fan is prolonged.
Description
Technical field
The present invention relates to a kind of blower fan, particularly a kind of gas of dispatch that needs is difficult for being trapped in the blower fan that is provided with two blade impeller between back shroud of impeller and the Blower Housing.
Background technique
Blower fan is the mechanical energy that relies on input, improves supply gas the side by side machinery of body of gas pressure, and it is a kind of driven fluid machinery.Blower fan generally comprises Blower Housing, motor and impeller, and the Blower Housing rear end is provided with motor, and impeller is arranged in the Blower Housing, links to each other with the output shaft of motor, and during running, the output shaft impeller of motor is rotated, thereby reaches the purpose of dispatch gas.When impeller is installed in the Blower Housing; All can leave certain gap between itself and the Blower Housing; In case the uppermost leaf wheel grinds Blower Housing production in the work rotating process, this also brings a problem simultaneously: the blade of blower fan is normally to be arranged between front shroud and the back shroud, only between front shroud and back shroud, forms circulation of air flow; Therefore blower fan is in the process of dispatch gas; Can be more residual between the back shroud of impeller and the Blower Housing need the gas of dispatch, blower fan using scope of today more and more widely, the gas of dispatch possibly have corrosivity; Be trapped in for a long time in the Blower Housing and can cause corrosion to a certain degree, shortened the working life of blower fan impeller and Blower Housing.
Summary of the invention
Technical problem to above-mentioned existence the objective of the invention is: proposed a kind of gas of dispatch that needs and be difficult for being trapped in the blower fan that is provided with two blade impeller between back shroud of impeller and the Blower Housing.
Technical solution of the present invention is achieved in that a kind of blower fan that is provided with two blade impeller; Comprise Blower Housing, motor and impeller, said Blower Housing rear end is provided with motor, and said impeller is arranged in the Blower Housing; Link to each other with the output shaft of motor; Said impeller comprises front shroud, back shroud and first blade, a plurality of first blades of annular array between said front shroud and the back shroud, and the back surperficial circular array of said back shroud is shown a plurality of second blades.
Preferably, the back surperficial central authorities of said back shroud are provided with boss; Said boss is positioned at the formed circumference of a plurality of second blades; The height of said boss is greater than second blades height
Preferably, the number of said first blade is identical with the number of second blade.
Because the utilization of technique scheme, the present invention compared with prior art has advantage:
The blower fan that is provided with two blade impeller of the present invention; Because the back surperficial circular array of the back shroud of impeller is shown a plurality of second blades; Make the gas in the back shroud of impeller and the need dispatch between the housing can participate in the air-flow dispatch circuit process; Avoid some to have corrosive gas that needs dispatch, be trapped in the Blower Housing corrosion that impeller and Blower Housing are caused for a long time, prolonged the working life of blower fan; Simultaneously because the number of second blade is identical with the number of first blade; Make the same frequency of circulation of air flow of win blade and the formation of second blade rotation; Make non-interference between first blade and second blade, help the dispatch of gas, increased the efficiency of supply of blower fan.
Description of drawings
Below in conjunction with accompanying drawing technological scheme of the present invention is described further:
Accompanying drawing 1 is the stereogram that is provided with the blower fan of two blade impeller of the present invention;
Accompanying drawing 2 is the exploded view that is provided with the blower fan of two blade impeller of the present invention;
Wherein: 1, Blower Housing; 2, motor; 3, front shroud 4, back shroud; 5, first blade; 6, first blade; 7, boss.
Embodiment
Below in conjunction with accompanying drawing the present invention is described.
Like accompanying drawing 1, the of the present invention a kind of blower fan that is provided with two blade impeller shown in 2; Comprise Blower Housing 1, motor 2 and impeller, said Blower Housing 1 rear end is provided with motor 2, and said impeller is arranged in the Blower Housing 1; Link to each other with the output shaft of motor 2; Said impeller comprises front shroud 3, back shroud 4 and first blade 5, a plurality of first blades 5 of annular array between said front shroud 3 and the back shroud 4, and the back surperficial circular array of said back shroud 4 is shown a plurality of second blades 6; The number of said first blade 5 is identical with the number of second blade 6; The back surperficial central authorities of said back shroud 4 are provided with boss 7; Said boss 7 is positioned at a plurality of second blade, 6 formed circumference; The height of said boss 7 is greater than the height of second blade 6; The number of said first blade 5 is identical with the number of second blade 6.
During use, the output shaft impeller of motor 2 is rotated, thereby reaches the purpose of dispatch gas.In the dispatch process; Make between the back shroud 4 of impeller and housing the gas of 1 need dispatch can participate in the air-flow dispatch circuit process; Avoided some to have corrosive gas that needs dispatch; Be trapped in the Blower Housing corrosion that impeller and Blower Housing are caused for a long time, prolonged the working life of blower fan; Simultaneously during wheel rotation, first blade 5 and second blade 6 rotate the same frequency of circulation of air flow of formation, make non-interference between first blade 5 and second blade 6, help the dispatch of gas, have increased the efficiency of supply of blower fan.
The foregoing description only is explanation technical conceive of the present invention and characteristics; Its purpose is to let the personage that is familiar with this technology can understand content of the present invention and implements; Can not limit protection scope of the present invention with this; All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (3)
1. blower fan that is provided with two blade impeller; Comprise Blower Housing, motor and impeller, said Blower Housing rear end is provided with motor, and said impeller is arranged in the Blower Housing; Link to each other with the output shaft of motor; Said impeller comprises front shroud, back shroud and first blade, a plurality of first blades of annular array between said front shroud and the back shroud, and it is characterized in that: the back surperficial circular array of said back shroud is shown a plurality of second blades.
2. the blower fan that is provided with two blade impeller according to claim 2 is characterized in that: the back surperficial central authorities of said back shroud are provided with boss; Said boss is positioned at the formed circumference of a plurality of second blades; The height of said boss is greater than second blades height.
3. the blower fan that is provided with two blade impeller according to claim 1 and 2 is characterized in that: the number of said first blade is identical with the number of second blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101691652A CN102720702A (en) | 2012-05-29 | 2012-05-29 | Fan provided with double-blade impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101691652A CN102720702A (en) | 2012-05-29 | 2012-05-29 | Fan provided with double-blade impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102720702A true CN102720702A (en) | 2012-10-10 |
Family
ID=46946540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101691652A Pending CN102720702A (en) | 2012-05-29 | 2012-05-29 | Fan provided with double-blade impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102720702A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131154A (en) * | 2017-04-28 | 2017-09-05 | 广东威灵电机制造有限公司 | Blower fan system and electric device |
| WO2018028205A1 (en) * | 2016-08-06 | 2018-02-15 | 中山大洋电机股份有限公司 | Wind wheel and blower using the same |
-
2012
- 2012-05-29 CN CN2012101691652A patent/CN102720702A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018028205A1 (en) * | 2016-08-06 | 2018-02-15 | 中山大洋电机股份有限公司 | Wind wheel and blower using the same |
| CN107131154A (en) * | 2017-04-28 | 2017-09-05 | 广东威灵电机制造有限公司 | Blower fan system and electric device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102720702A (en) | Fan provided with double-blade impeller | |
| CN103062111A (en) | Fan impeller | |
| CN102261342B (en) | Centrifugal fan with external motor | |
| CN203272166U (en) | Centrifugal induced draft fan | |
| KR20180002376A (en) | Impeller and blower comprising the same | |
| CN203604104U (en) | Novel water turbine for cooling tower | |
| CN205207221U (en) | Fan | |
| CN202833308U (en) | Draught fan with double-vane impeller | |
| CN102840148A (en) | Centrifugal ventilator | |
| CN203892217U (en) | Multi-level high-pressure blower | |
| CN102720693A (en) | Double-blade impeller | |
| CN102720698A (en) | Fan | |
| CN202659559U (en) | Centrifugal fan capable of operating stably | |
| CN203009386U (en) | Blade of blower fan | |
| CN201568367U (en) | Material conveying fan impeller with back blades | |
| CN204186626U (en) | Low windage high efficiency motor fan | |
| CN204419694U (en) | Modified model fan impeller system | |
| CN202157981U (en) | External centrifugal fan of motor | |
| CN202194859U (en) | Centrifugal fan | |
| CN204126966U (en) | A kind of new and effective axial-flow blower | |
| CN206439231U (en) | A kind of new and effective backward centrifugal fan | |
| CN209398629U (en) | A kind of centrifugal impeller | |
| CN202789605U (en) | Axial flow fan | |
| CN201763674U (en) | Forward wing type fan impeller | |
| CN202493449U (en) | Heat dissipation centrifugal fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121010 |