CN201891660U - Fan impeller with unequal-thickness blades - Google Patents
Fan impeller with unequal-thickness blades Download PDFInfo
- Publication number
- CN201891660U CN201891660U CN 201020605816 CN201020605816U CN201891660U CN 201891660 U CN201891660 U CN 201891660U CN 201020605816 CN201020605816 CN 201020605816 CN 201020605816 U CN201020605816 U CN 201020605816U CN 201891660 U CN201891660 U CN 201891660U
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- blade
- impeller
- thickness
- blades
- fan impeller
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Abstract
The utility model discloses a fan impeller with unequal-thickness blades. The fan impeller comprises a wheel disk, a wheel cap and blades positioned between the wheel disk and the wheel cap. The thicknesses of the blades are uneven, and the thickness of the root of the blade positioned at the inlet position of the impeller is larger than that of each of the rest blades. The root of the blade positioned at the inlet position of the impeller is thickened properly, the maximum bending stress of the blades is decreased, and the rest blades are not thickened, so that materials are saved while weight is reduced, the rotary inertia of a fan is reduced, and starting of the fan is facilitated.
Description
Technical field
The utility model relates to draught fan impeller, is specifically related to a kind of draught fan impeller of not straightedge vane.
Background technique
Impeller is the most important parts of centrifugal blower, and impeller comprises wheel cap, blade, wheel disc, and blade generally adopts straightedge vane.When calculating blade strength, can suppose that blade is a fixed beam, the maximum stress in bend of blade is: δ
Max=2tCl
2E, the t-vane thickness; The l-width of blade; E-impeller center is to the perpendicular distance of front side of vane, and after the model specification of blower fan was selected, its width of blade l, impeller center also just determined to the perpendicular distance e of front side of vane.
Can draw from above-mentioned formula, the flexural stress of blade is subjected to having the greatest impact of width of blade, and concerning centrifugal blower, the blade at general impeller inlet place is the wideest, and stress is also just maximum.This moment, the material of inlet satisfied requirement of strength, and then the material at other position fails to give full play to its effect.
The model utility content
The model utility purpose: the utility model provides a kind of and has saved material, reduced the draught fan impeller of the not straightedge vane of blower fan rotary inertia in order to solve the deficiencies in the prior art.
Technological scheme: a kind of draught fan impeller of not straightedge vane, comprise wheel disc, wheel cap, the blade between wheel disc and wheel cap, described vane thickness inequality, the thickness of root of blade that is positioned at the impeller inlet place is greater than the vane thickness of remaining part.
As optimization, the length of described root of blade is the 1/5-1/4 of length of blade.
As optimization, the thickness of described root of blade is 1.5-2.2 times of remaining part vane thickness.
Beneficial effect: the utility model is suitably thickeied the thickness of impeller inlet place root of blade, reduce the maximum stress in bend of blade, and the remaining part blade can not thickeied, so both saved material, weight reduction again reduces the rotary inertia of blower fan, helps the startup of motor.
Description of drawings
Fig. 1 is the cross-sectional view of radial blade impeller before transforming;
Fig. 2 is for transforming the cross-sectional view of front and back to blade impeller;
Fig. 3 is the cross-sectional view of the utility model radial blade impeller;
Fig. 4 is the cross-sectional view of the utility model backward inclined blade impeller.
Embodiment
As shown in the figure, a kind of draught fan impeller of not straightedge vane comprises wheel disc 1, wheel cap 2, the blade 3 between wheel disc 1 and wheel cap 2, described blade 3 uneven thickness, and the thickness t that is positioned at the root of blade 4 at impeller inlet place is remaining part blade 3 thickness t
12 times, the length of described root of blade 4 is 1/4 of blade 3 length.
Claims (3)
1. draught fan impeller of straightedge vane not, comprise wheel disc (1), wheel cap (2), be positioned at the blade (3) between wheel disc (1) and the wheel cap (2), it is characterized in that: described blade (3) uneven thickness, the thickness that is positioned at impeller intake grill place root of blade (4) is greater than remaining part blade (3) thickness.
2. according to the draught fan impeller of the described not straightedge vane of claim 1, it is characterized in that: the length of described root of blade (4) is the 1/5-1/4 of blade (3) length.
3. according to the draught fan impeller of the described not straightedge vane of claim 1, it is characterized in that: the thickness of described root of blade (4) is 1.5-2.2 times of remaining part blade (3) thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020605816 CN201891660U (en) | 2010-11-15 | 2010-11-15 | Fan impeller with unequal-thickness blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020605816 CN201891660U (en) | 2010-11-15 | 2010-11-15 | Fan impeller with unequal-thickness blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201891660U true CN201891660U (en) | 2011-07-06 |
Family
ID=44221135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020605816 Expired - Fee Related CN201891660U (en) | 2010-11-15 | 2010-11-15 | Fan impeller with unequal-thickness blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201891660U (en) |
-
2010
- 2010-11-15 CN CN 201020605816 patent/CN201891660U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20131115 |