CN2665417Y - Blade asymmetric type double air admission centrifugal blower fan - Google Patents
Blade asymmetric type double air admission centrifugal blower fan Download PDFInfo
- Publication number
- CN2665417Y CN2665417Y CN 200320118706 CN200320118706U CN2665417Y CN 2665417 Y CN2665417 Y CN 2665417Y CN 200320118706 CN200320118706 CN 200320118706 CN 200320118706 U CN200320118706 U CN 200320118706U CN 2665417 Y CN2665417 Y CN 2665417Y
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- blade
- motor
- centrifugal impeller
- centrifugal
- offside
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Abstract
Disclosed is a non-symmetrical-blade double-entry centrifugal fan, which comprises centrifugal impellers, a scroll casing and a motor. The blade outlet installation angle, the blade shape, the cord length of the blade central line and the blade number of the centrifugal impellers beside the motor and the centrifugal impellers opposite to the motor are different, the aerodynamic performances at both sides of the fan are changed so that the aerodynamic forces of the impellers at both sides of the fan are basically the same, and the motor shaft is stress evenly. The non-symmetry of the blades allows the wind pressure produced by the centrifugal impellers at both sides of the fan to be basically the same, the vortex at the outlet is reduced, the vortex noise and the vibration noise are decreased, and the efficiency of the entire fan is improved.
Description
Technical field
The utility model relates to a kind of centrifugal blower, especially a kind of two air inlet centrifugal blowers that are applicable to fields such as air conditioner, household electric appliance, vehicle, ventilation equipment.
Background technique
In background technique, the chord length and the number of blade of the exit installation angle of the two air inlet centrifugal blower motor side impeller blades of symmetric type and motor offside impeller blade, blade profile, blade center line are identical, because stopping of motor, make that the both sides inlet air conditions is different, cause the aerodynamic force difference of both sides centrifugal impeller, thereby cause the motor shaft discontinuity equalization, produced vibration noise, simultaneously owing to the both sides centrifugal impeller does not move at same operating point, thereby the difference of its pressure makes the air-flow of impeller outlet become chaotic, has increased flow losses simultaneously, has produced eddy current crack.
Summary of the invention
The purpose of this utility model is: provide a kind of blade asymmetric two air inlet centrifugal blowers, can not only effectively reduce vibration noise, and can also reduce flow losses, reduce eddy current crack, play the overall noise effect of raising the efficiency, reduce blower fan.
The object of the present invention is achieved like this: the two air inlet centrifugal blowers of a kind of blade asymmetric, comprise spiral case, centrifugal impeller, motor, the different part of its feature is: the exit installation angle of motor side centrifugal impeller blade is different with the exit installation angle of motor offside centrifugal impeller blade.
The exit installation angle of motor side centrifugal impeller blade is bigger than the exit installation angle of motor offside centrifugal impeller blade.
The chord length of motor side centrifugal impeller blade center line is longer than the chord length of motor offside centrifugal impeller blade center line.
The chord length of motor side centrifugal impeller blade center line is shorter than the chord length of motor offside centrifugal impeller blade center line.
Motor side centrifugal impeller blade is axially straight sheet, and motor offside centrifugal impeller blade is wedged plate or distortion sheet.
Motor offside centrifugal impeller blade is axially straight sheet, and motor side centrifugal impeller blade is wedged plate or distortion sheet.
Motor side centrifugal impeller vane foil is a circular arc type, and motor offside centrifugal impeller vane foil is wing blade or straight line type.
Motor offside centrifugal impeller vane foil is a circular arc type, and motor side centrifugal impeller vane foil is wing blade or straight line type.
The number of blade of motor side centrifugal impeller is Duoed than the number of blade of motor offside centrifugal impeller or is few.
The two air inlet centrifugal blowers of a kind of blade asymmetric, comprise centrifugal impeller, spiral case, motor, its special way is: the exit installation angle of motor side centrifugal impeller blade is identical with the exit installation angle of motor offside centrifugal impeller blade, and the blade profile of the blade profile of motor side centrifugal impeller blade, the chord length of blade center line and the number of blade and motor offside centrifugal impeller blade, the chord length and the number of blade of blade center line are different.
The two air inlet centrifugal blowers of the utility model blade asymmetric, the chord length of the exit installation angle of motor side centrifugal impeller blade, blade profile, blade center line and the number of blade are different with the opposite side centrifugal impeller.Changed the aeroperformance of blower fan both sides, cause the aerodynamic force of both sides centrifugal impeller basic identical, the motor shaft stress equalization, simultaneously because this blade is asymmetric, the blast that the both sides centrifugal impeller is produced is substantially the same, reduced and opening vortex, reduced eddy current crack, vibration noise, improved complete blower efficient.
Description of drawings
Fig. 1 is the plan view of the two air inlet centrifugal blowers of the utility model blade asymmetric.
Fig. 2 is the left view of the two air inlet centrifugal blowers of the utility model blade asymmetric.
Fig. 3 is the right elevation of the two air inlet centrifugal blowers of the utility model blade asymmetric.
Fig. 4 is the three-dimensional view of the blade of the two air inlet centrifugal blowers of the utility model blade asymmetric for axially straight sheet.
Fig. 5 is that the blade of the two air inlet centrifugal blowers of the utility model blade asymmetric is the three-dimensional view of wedged plate.
Fig. 6 is the three-dimensional view of the blade of the two air inlet centrifugal blowers of the utility model blade asymmetric for the distortion sheet.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail
As Fig. 1, Fig. 2, shown in Figure 3,101, the motor side centrifugal impeller, 102, motor offside centrifugal impeller, 2, motor, 3, spiral case.
The two air inlet centrifugal blowers of the utility model blade asymmetric, comprise centrifugal impeller 101,102, motor 2, spiral case 3, motor 2 are fixed on the spiral case 3, the axle of centrifugal impeller 101,102 and motor 2 is fixing, and the vane foil of centrifugal impeller 101,102 can be circular arc type, wing blade, straight line type; As Fig. 4, Fig. 5, shown in Figure 6, blade can be axially straight sheet, wedged plate, distortion sheet; The chord length of the blade exit established angle of motor side centrifugal impeller 101, blade profile, blade center line and the number of blade are different with motor offside centrifugal impeller 102; The blade exit established angle of motor side centrifugal impeller 101 is bigger than the exit installation angle of motor offside centrifugal impeller 102, the chord length of motor side centrifugal impeller 101 blade center lines is longer than the chord length of motor offside centrifugal impeller 102 blade center lines, and chord length that also can motor side centrifugal impeller 101 blade center lines is shorter than the chord length of motor offside centrifugal impeller 102 blade center lines; Motor side centrifugal impeller 101 blades are the axially straight sheet of axle, also can be wedged plate or distortion sheet, and motor offside centrifugal impeller 102 blades are wedged plate or distortion sheet, also axially straight sheet; Motor side centrifugal impeller 101 vane foils are circular arc type, also can be wing blade or straight line type, and motor offside centrifugal impeller 102 vane foils are wing blade or straight line type, also can be circular arc types; The number of blade of motor side centrifugal impeller 101 is more than the number of blade of motor offside centrifugal impeller 102, also can lack than the number of blade of motor offside centrifugal impeller 102; Driving two centrifugal impellers 101,102 that fuse by motor 2 rotates in spiral case 3, thereby drive gas motion, produce blast, wind speed, play draught effect, changed the aeroperformance of blower fan both sides, cause the aerodynamic force of both sides centrifugal impeller basic identical, the motor shaft stress equalization.
As the two air inlet centrifugal blowers of the utility model blade asymmetric can also be that the exit installation angle of motor side centrifugal impeller 101 blades is identical with the exit installation angle of motor offside centrifugal impeller 102 blades, and the blade profile of the blade profile of motor side centrifugal impeller 101 blades, the chord length of blade center line and the number of blade and motor offside centrifugal impeller 102 blades, the chord length and the number of blade of blade center line are different.
Claims (10)
1, the two air inlet centrifugal blowers of a kind of blade asymmetric comprise centrifugal impeller, spiral case, motor, and it is characterized in that: the exit installation angle of motor side centrifugal impeller blade is different with the exit installation angle of motor offside centrifugal impeller blade.
2, the two air inlet centrifugal blowers of blade asymmetric according to claim 1, it is characterized in that: the exit installation angle of motor side centrifugal impeller blade is bigger than the exit installation angle of motor offside centrifugal impeller blade.
3, the two air inlet centrifugal blowers of blade asymmetric according to claim 2, it is characterized in that: the chord length of motor side centrifugal impeller blade center line is longer than the chord length of motor offside centrifugal impeller blade center line.
4, the two air inlet centrifugal blowers of blade asymmetric according to claim 2, it is characterized in that: the chord length of motor side centrifugal impeller blade center line is shorter than the chord length of motor offside centrifugal impeller blade center line.
5, according to claim 3 or the two air inlet centrifugal blowers of 4 described blade asymmetrics, it is characterized in that: motor side centrifugal impeller blade is axially straight sheet, and motor offside centrifugal impeller blade is wedged plate or distortion sheet.
6, according to claim 3 or the two air inlet centrifugal blowers of 4 described blade asymmetrics, it is characterized in that: motor offside centrifugal impeller blade is axially straight sheet, and motor side centrifugal impeller blade is wedged plate or distortion sheet.
7, according to claim 5 or the two air inlet centrifugal blowers of 6 described blade asymmetrics, it is characterized in that: motor side centrifugal impeller vane foil is a circular arc type, and motor offside centrifugal impeller vane foil is wing blade or straight line type.
8, according to claim 5 or the two air inlet centrifugal blowers of 6 described blade asymmetrics, it is characterized in that: motor offside centrifugal impeller vane foil is a circular arc type, and motor side centrifugal impeller vane foil is wing blade or straight line type.
9, according to claim 7 or the two air inlet centrifugal blowers of 8 described blade asymmetrics, it is characterized in that: the number of blade of motor side centrifugal impeller is Duoed than the number of blade of motor offside centrifugal impeller or is few.
10, the two air inlet centrifugal blowers of a kind of blade asymmetric, comprise centrifugal impeller, spiral case, motor, it is characterized in that: the exit installation angle of motor side centrifugal impeller blade is identical with the exit installation angle of motor offside centrifugal impeller blade, and the blade profile of the blade profile of motor side centrifugal impeller blade, the chord length of blade center line and the number of blade and motor offside centrifugal impeller blade, the chord length and the number of blade of blade center line are different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320118706 CN2665417Y (en) | 2003-12-01 | 2003-12-01 | Blade asymmetric type double air admission centrifugal blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320118706 CN2665417Y (en) | 2003-12-01 | 2003-12-01 | Blade asymmetric type double air admission centrifugal blower fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2665417Y true CN2665417Y (en) | 2004-12-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320118706 Expired - Fee Related CN2665417Y (en) | 2003-12-01 | 2003-12-01 | Blade asymmetric type double air admission centrifugal blower fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2665417Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922457A (en) * | 2010-09-10 | 2010-12-22 | 朱崇央 | Eddy-current booster fan |
| CN105057076A (en) * | 2015-08-14 | 2015-11-18 | 吉首大学 | Huperzia serrata ventilation type crusher |
| CN112377457A (en) * | 2020-10-13 | 2021-02-19 | 宁波方太厨具有限公司 | Impeller, centrifugal fan applying same and range hood |
-
2003
- 2003-12-01 CN CN 200320118706 patent/CN2665417Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922457A (en) * | 2010-09-10 | 2010-12-22 | 朱崇央 | Eddy-current booster fan |
| CN105057076A (en) * | 2015-08-14 | 2015-11-18 | 吉首大学 | Huperzia serrata ventilation type crusher |
| CN112377457A (en) * | 2020-10-13 | 2021-02-19 | 宁波方太厨具有限公司 | Impeller, centrifugal fan applying same and range hood |
| CN112377457B (en) * | 2020-10-13 | 2021-12-17 | 宁波方太厨具有限公司 | Impeller, centrifugal fan applying same and range hood |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |