CN202851448U - Backward centrifugal blade - Google Patents
Backward centrifugal blade Download PDFInfo
- Publication number
- CN202851448U CN202851448U CN201220452733.5U CN201220452733U CN202851448U CN 202851448 U CN202851448 U CN 202851448U CN 201220452733 U CN201220452733 U CN 201220452733U CN 202851448 U CN202851448 U CN 202851448U
- Authority
- CN
- China
- Prior art keywords
- base
- blade
- convex surface
- guide vane
- 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.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses a backward centrifugal blade comprising a base, blades and a front disc, wherein the base is a symmetric rotator structure, a shaft hole for installing a motor is arranged in the center of the base, a plurality of blades are fixed between the base and the front disc at a degree smaller than 90 degrees, and the external sides of the blades are uniformly distributed along the periphery of the base. The front disc comprises outer protruding curved guide vanes, of which the number is identical to that of the blades, and an air draught loop, wherein the outer protruding curved guide vanes are arranged between two blades. The inner edges of the outer protruding curved guide vanes are fixed on the air draught loop, and the projections of the outer edges of the outer protruding curved guide vanes on the base are superposed with the external periphery of the base. The base, blades and the outer protruding curved guide vanes form an expanding air outlet of which the direction is opposite to the rotation direction of the backward centrifugal blade. The backward centrifugal blade when rotates rapidly generates low eddy current sound. Compared with backward centrifugal blade of the same specification, the backward centrifugal blade is 3db lower in noise.
Description
Technical field
The utility model relates to a kind of backward centrifugation blade.
Background technique
Centrifugation blade is widely used in the household appliances such as dehumidifier, air cleaner, cabinet air-conditioner, mobile air conditioner.The leaf type of centrifugation blade have forward direction, radially, backward three kinds of different forms.The blades installation angle of backward centrifugation blade is less than 90 degree, and the Way out of blade is opposite with the sense of rotation of impeller.Backward centrifugation blade generally is used for the higher occasion of rotating ratio, and its utilization efficiency is high, but often noise is higher.
The model utility content
Technical problem to be solved in the utility model provides a kind of the rear to centrifugation blade of low noise of can realizing when high-speed rotary.
In order to solve the problems of the technologies described above, technological scheme provided by the utility model is: a kind of backward centrifugation blade comprises base, blade and shroud; Described base is the symmetrical rotary body structure; The center of described base is provided with the axis hole for mounted motor; Described blade is provided with multi-disc, and is fixed between base and the shroud, and the setting angle of blade is less than 90 degree; The outside of described multi-disc blade evenly distributes along the periphery of base; Described shroud is comprised of outer convex surface guide vane and the air draught circle identical with the quantity of blade; Described outer convex surface guide vane is arranged between two blades, and the inward flange of outer convex surface guide vane is fixed on the air draught circle, and the projection of the outward edge of outer convex surface guide vane on base overlaps with the outward edge of base; Described base, blade and outer convex surface guide vane form the expanssion type exhaust outlet, and the direction of this exhaust outlet is opposite with the sense of rotation of backward centrifugation blade.
Described base comprises fitting seat and is arranged on the toroidal race of fitting seat periphery; Described axis hole is arranged on the center of fitting seat, is provided with a plurality of equally distributed through holes around the axis hole; Described blade is fixed on the toroidal race.
Described blade is curved, and the joint of blade and base is provided with the technique fillet.
The outer convex surface guide vane of described shroud is to the opposite direction projection of the air draught direction of backward centrifugation blade.
After having adopted technique scheme, the utlity model has following beneficial effect: the eddy current sound that the expanssion type exhaust outlet that (1) the utility model is formed by base, blade and outer convex surface guide vane produces in the time of can effectively reducing the utility model High Rotation Speed, compare with the backward centrifugation blade with equal-specification, noise of the present utility model will hang down 3db.
(2) joint of blade of the present utility model and base is provided with the technique fillet, and this mechanism is the join strength of reinforced blade and base effectively.
Description of drawings
Content of the present utility model is easier to be expressly understood in order to make, and the below is described in further detail the utility model, wherein according to specific embodiment also by reference to the accompanying drawings
Fig. 1 is structural representation of the present utility model.
Label in the accompanying drawing is:
Base 1, fitting seat 11, toroidal race 12, axis hole 13, through hole 14, blade 2, shroud 3, outer convex surface guide vane 31, air draught circle 32.
Embodiment
(embodiment 1)
See Fig. 1, the backward centrifugation blade of the present embodiment comprises base 1, blade 2 and shroud 3.
Base 1 is the symmetrical rotary body structure.Base 1 comprises fitting seat 11 and is arranged on the toroidal race 12 of fitting seat 11 peripheries.The center of fitting seat 11 is provided with the axis hole 13 for mounted motor.Be provided with a plurality of equally distributed through holes 14 around the axis hole 13.
Blade 2 is provided with multi-disc, and curved.Multi-disc blade 2 is fixed between the toroidal race 12 and shroud 3 of base 1, and the setting angle of blade 2 is less than 90 degree, and the joint of the toroidal race 12 of blade 2 and base 1 is provided with the technique fillet.The outside of multi-disc blade 2 evenly distributes along the periphery of base 1.
Shroud 3 is comprised of outer convex surface guide vane 31 and the air draught circle 32 identical with the quantity of blade 2.Outer convex surface guide vane 31 is to the opposite direction projection of the air draught direction of backward centrifugation blade.Outer convex surface guide vane 31 is arranged between two blades 2, and the inward flange of outer convex surface guide vane 31 is fixed on the air draught circle 32, and the projection of the outward edge of outer convex surface guide vane 31 on base 1 overlaps with the outward edge of base 1.Base 1, blade 2 and outer convex surface guide vane 31 form the expanssion type exhaust outlet, and the direction of this exhaust outlet is opposite with the sense of rotation of backward centrifugation blade.。
Above-described specific embodiment; the purpose of this utility model, technological scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. a backward centrifugation blade is characterized in that: comprise base (1), blade (2) and shroud (3); Described base (1) is the symmetrical rotary body structure; The center of described base (1) is provided with the axis hole (13) for mounted motor; Described blade (2) is provided with multi-disc, and is fixed between base (1) and the shroud (3), and the setting angle of blade (2) is less than 90 degree; The outside of described multi-disc blade (2) evenly distributes along the periphery of base (1); Described shroud (3) is comprised of outer convex surface guide vane (31) and the air draught circle (32) identical with the quantity of blade (2); Described outer convex surface guide vane (31) is arranged between two blades (2), the inward flange of outer convex surface guide vane (31) is fixed on the air draught circle (32), and the projection of the outward edge of outer convex surface guide vane (31) on base (1) overlaps with the outward edge of base (1); Described base (1), blade (2) and outer convex surface guide vane (31) form the expanssion type exhaust outlet, and the direction of this exhaust outlet is opposite with the sense of rotation of backward centrifugation blade.
2. a kind of backward centrifugation blade according to claim 1, it is characterized in that: described base (1) comprises fitting seat (11) and is arranged on the toroidal race (12) of fitting seat (11) periphery; Described axis hole (13) is arranged on the center of fitting seat (11), is provided with a plurality of equally distributed through holes (14) around the axis hole (13); Described blade (2) is fixed on the toroidal race (12).
3. a kind of backward centrifugation blade according to claim 1, it is characterized in that: described blade (2) is curved, and blade (2) is provided with the technique fillet with the joint of base (1).
4. a kind of backward centrifugation blade according to claim 1 is characterized in that: the outer convex surface guide vane (31) of described shroud (3) is to the opposite direction projection of the air draught direction of backward centrifugation blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220452733.5U CN202851448U (en) | 2012-09-06 | 2012-09-06 | Backward centrifugal blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220452733.5U CN202851448U (en) | 2012-09-06 | 2012-09-06 | Backward centrifugal blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202851448U true CN202851448U (en) | 2013-04-03 |
Family
ID=47982655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220452733.5U Expired - Lifetime CN202851448U (en) | 2012-09-06 | 2012-09-06 | Backward centrifugal blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202851448U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140537A (en) * | 2018-11-02 | 2020-05-12 | 苏州三星电子有限公司 | Fan air guide assembly and centrifugal fan |
| US11041502B2 (en) | 2018-01-30 | 2021-06-22 | Carrier Corporation | Double inlet backward curved blower |
| US11242864B2 (en) | 2016-10-18 | 2022-02-08 | Carrier Corporation | Asymmetric double inlet backward curved blower |
-
2012
- 2012-09-06 CN CN201220452733.5U patent/CN202851448U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11242864B2 (en) | 2016-10-18 | 2022-02-08 | Carrier Corporation | Asymmetric double inlet backward curved blower |
| US11041502B2 (en) | 2018-01-30 | 2021-06-22 | Carrier Corporation | Double inlet backward curved blower |
| US11873831B2 (en) | 2018-01-30 | 2024-01-16 | Carrier Corporation | Double inlet backward curved blower |
| CN111140537A (en) * | 2018-11-02 | 2020-05-12 | 苏州三星电子有限公司 | Fan air guide assembly and centrifugal fan |
| CN111140537B (en) * | 2018-11-02 | 2021-11-12 | 苏州三星电子有限公司 | Fan air guide assembly and centrifugal fan |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204900330U (en) | Fan wheel , centrifugal fan and domestic appliance | |
| CN202851448U (en) | Backward centrifugal blade | |
| JP3204521U (en) | fan | |
| CN203879799U (en) | Double-suction centrifugal fan blade | |
| CN201547015U (en) | Low-noise centrifugal wind wheel | |
| CN203685679U (en) | Centrifugal fan blade, centrifugal fan and air conditioner | |
| KR20080019521A (en) | Propeller fan | |
| CN102536900A (en) | Axial flow wind wheel | |
| CN204716616U (en) | A kind of highly effective low noise axial-flow windwheel of air conditioner outdoor machine | |
| CN106015090A (en) | Centrifugal fan blade, centrifugal fan and air conditioning device | |
| CN203067346U (en) | Double-inlet centrifugal wind wheel and conditioner adopting same | |
| CN201080925Y (en) | Fan flow guiding structure | |
| CN207420962U (en) | A kind of aerofoil fan and air-conditioner outdoor unit for air-conditioner outdoor unit | |
| CN202833301U (en) | Axial fan and air conditioner outside machine | |
| CN203051219U (en) | Novel axial fan used for air-conditioner outdoor unit | |
| CN203730399U (en) | Axial flow impeller and axial flow fan | |
| CN202665445U (en) | Anti-backflow impeller for dust collector | |
| CN202628612U (en) | Axial flow fan blade, fan and air conditioner outdoor machine | |
| CN205243937U (en) | High -pressure centrifugal blower that reducible amount of wind leaked | |
| CN104895838A (en) | Axial flow blade and axial flow fan | |
| CN203670291U (en) | Pressure boost and energy conservation type centrifugal blower | |
| CN203297153U (en) | Exhaust fan impeller | |
| CN203453116U (en) | Radiation fan with double wind directions | |
| CN203548268U (en) | Two-way air inlet centrifugal fan | |
| CN203810595U (en) | Fan air outlet protection cover, fan and air conditioner outdoor unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |
|
| CX01 | Expiry of patent term |