CN204371773U - Centrifugal fan impeller - Google Patents
Centrifugal fan impeller Download PDFInfo
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- CN204371773U CN204371773U CN201420801696.3U CN201420801696U CN204371773U CN 204371773 U CN204371773 U CN 204371773U CN 201420801696 U CN201420801696 U CN 201420801696U CN 204371773 U CN204371773 U CN 204371773U
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Abstract
The utility model relates to the Centrifugal Fan Impeller of field of ventilation equipment.Centrifugal Fan Impeller, comprise wheel disc, multiple blade, wheel cap and wheel hub, the diameter of wheel disc and wheel cap is all less than the external profile diameter of blade, and namely the outboard end of blade stretches out outside wheel disc and wheel disc, and the blade length of stretching out outside wheel disc and wheel cap is 0.6% ~ 1.5% of wheel diameter; Blade exit end profile shape between wheel disc and wheel cap is the combination of multiple jagged equity curve section.The advantage of this impeller is position by rationally changing blade exit edge and shape, can reduce the air current flow loss of impeller outlet portion, fan total efficiency can be improved to some extent.
Description
Technical field
The utility model relates to the Centrifugal Fan Impeller of field of ventilation equipment, particularly a kind of backward Centrifugal Fan Impeller.
Background technique
Impeller is the critical component of centrifugal blower, and in raising fan efficiency, the emphasis of optimal design is impeller, and its Leaf is particularly crucial, and in the All aspects of of blade shape, forefathers have carried out long-term exploration and achieved many fruitful achievements.
Existing Centrifugal Fan Impeller structure as shown in Figure 1, form primarily of wheel disc 11, blade 12, wheel cap 13 and wheel hub 14, blade 12 is between wheel disc 13 and wheel cap 11, and the external profile diameter of blade 12 is not more than the diameter of wheel disc 11 or wheel cap 13, namely the outer end of blade 12 is not stretched out outside wheel disc 11 or wheel cap 12.
Summary of the invention
The purpose of this utility model is to provide a kind of novel structure, the Centrifugal Fan Impeller that total pressure efficiency is high.
In order to realize above-mentioned object, the utility model have employed following technological scheme:
Centrifugal Fan Impeller, comprise wheel disc, multiple blade, wheel cap and wheel hub, multiple blade is between wheel disc and wheel cap, wheel disc, blade, wheel cap and wheel hub are working of plastics, wheel hub and wheel disc are connected as a single entity, and blade one end and wheel disc injection moulding are connected as a single entity, and the other end and wheel cap injection moulding are connected as a single entity; The diameter of wheel disc and wheel cap is all less than the external profile diameter of blade, and namely the outboard end of blade stretches out outside wheel disc and wheel disc, and the blade length of stretching out outside wheel disc and wheel cap is 0.6% ~ 1.5% of wheel diameter; Blade exit end profile shape between wheel disc and wheel cap is the combination of multiple jagged equity curve section.
As preferably, described blade is uniformly distributed at circumferencial direction.
As preferably, the position of the maximum external profile diameter of described blade is near wheel cap side.
As preferably, the position of the maximum external profile diameter of described blade is near wheel disc side.
Have employed a kind of Centrifugal Fan Impeller of above-mentioned technological scheme, the diameter of wheel disc and wheel cap is all less than the external profile diameter of blade, namely the outboard end of blade stretches out outside wheel disc and wheel cap, and the blade length of stretching out outside wheel disc and wheel cap is 0.6% ~ 1.5% of wheel diameter, blade exit end profile shape between wheel disc and wheel cap is the combination of multiple jagged equity curve section, by rationally changing position and the shape at blade exit edge, the air current flow loss of impeller outlet portion can be reduced, fan total efficiency can be improved to some extent.
Accompanying drawing explanation
Fig. 1: the structural representation of existing Centrifugal Fan Impeller in background technique.
Fig. 2: the structural representation of the utility model embodiment Centrifugal Fan Impeller.
Fig. 3: the perspective view of the utility model embodiment Centrifugal Fan Impeller.
Fig. 4: the partial cutaway schematic of the utility model embodiment Centrifugal Fan Impeller.
Embodiment
Below in conjunction with Fig. 2-Fig. 4, embodiment of the present utility model is made a detailed explanation.
Embodiment
A kind of Centrifugal Fan Impeller as shown in Figure 2, Figure 3 and Figure 4, comprise wheel disc 1, multiple blade 2, wheel cap 3 and wheel hub 4, multiple blade 2 is between wheel disc 1 and wheel cap 3, wheel disc 1, blade 2, wheel cap 3 and wheel hub 4 are working of plastics, wheel hub 4 and wheel disc 1 are connected as a single entity, blade 2 one end and wheel disc 1 injection moulding are connected as a single entity, and the other end and wheel cap 3 injection moulding are connected as a single entity.
The diameter of wheel disc 1 and wheel cap 3 is all less than the external profile diameter of blade 2, and namely the outboard end of blade 2 stretches out outside wheel disc 1 and wheel disc 3, and the length that blade maximum outer rim place stretches out outside wheel disc and wheel cap is 0.6% ~ 1.5% of wheel diameter at diametric numerical value.
Blade 2 outlet end contour shape between wheel disc 1 and wheel cap 3 is the combination of multiple jagged equity curve section, specifically multiple jagged equity curve is set on the basis of main body straightway, the position of the maximum external profile diameter of blade 2 is near wheel cap 3 side, and each external profile diameter is as follows respectively:
| External profile diameter | Wheel disc | The blade external profile diameter of wheel disc end | The blade external profile diameter of wheel cap end | The maximum external profile diameter of blade | Shroud diameter |
| Numerical value (mm) | Φ253.1 | Φ251.7 | Φ257.2 | Φ257.2 | Φ251.1 |
Relative to the Centrifugal Fan Impeller that blade existing in Fig. 1 does not stretch out outside wheel disc and wheel hub, blade exit shape is conventional flattened edge, identical at blade quantity, under the prerequisite that wheel disc is identical with wheel cap physical dimension, the Centrifugal Fan Impeller total pressure efficiency of this patent improves 0.5% ~ 1.4%, and noise have dropped 0.5dB-0.7 dB.
Above-described embodiment is only this patent preferably mode of execution, the external profile diameter of such as above-mentioned wheel disc 1 and the external profile diameter of wheel cap 3 can identical, also can not be identical, when wheel disc 1 is not identical with wheel cap 3 diameter, namely can be that the diameter of wheel disc 1 is large, also can be that the diameter of wheel cap 3 is large; Namely the position of the maximum external profile diameter of above-mentioned blade 2 can, near wheel cap 3, also or can be between the two near wheel disc 1; Above-mentioned multiple blade can be uniformly distributed along the circumferencial direction of impeller and also can irregularly distribute, and the molded line of blade can be the one in following molded line: composite line blade, wing blades that the composite line blade that the circular arc of dull and stereotyped prismatic blade, single curved blade, different radii is formed, circular arc combine with straightway; Blade 2 can also be plain vane or distorted shape blade; Blade 2 and wheel disc 1 can be vertical, also can be in certain angle of inclination.
The length that the blade maximum outer rim place of this patent stretches out outside wheel disc and wheel cap is 0.6% ~ 1.5% of wheel diameter at diametric numerical value, its parameter very important, when the blade length of stretching out outside wheel disc 1 and wheel cap 3 is less than 0.6%, fan total efficiency is without significant change, when the blade length of stretching out outside wheel disc 1 and wheel cap 3 is greater than 1.5%%, fan total efficiency declines gradually, and especially noise progressively increases, and at least increases more than 0.4dB.
In sum, the present invention is directed to impeller outlet each position outlet velocity, each position blade exit airspeed particularly along axial direction is inconsistent, process targetedly in shape from blade exit edge, namely designing brand-new blade structure, by rationally changing outlet edge position and the shape of blade, the air current flow loss of impeller outlet portion can be reduced, fan total efficiency can be improved to some extent, simultaneously suitably reduce noise.
Claims (4)
1. Centrifugal Fan Impeller, comprise wheel disc, multiple blade, wheel cap and wheel hub, multiple blade is between wheel disc and wheel cap, wheel disc, blade, wheel cap and wheel hub are working of plastics, wheel hub and wheel disc are connected as a single entity, blade one end and wheel disc injection moulding are connected as a single entity, and the other end and wheel cap injection moulding are connected as a single entity; It is characterized in that the diameter of wheel disc and wheel cap is all less than the external profile diameter of blade, namely the outboard end of blade stretches out outside wheel disc and wheel disc, and the blade length of stretching out outside wheel disc and wheel cap is 0.6% ~ 1.5% of wheel diameter; Blade exit end profile shape between wheel disc and wheel cap is the combination of multiple jagged equity curve section.
2. Centrifugal Fan Impeller according to claim 1, is characterized in that blade is uniformly distributed at circumferencial direction.
3. Centrifugal Fan Impeller according to claim 1, is characterized in that the position of the maximum external profile diameter of blade is near wheel cap side.
4. Centrifugal Fan Impeller according to claim 1, is characterized in that the position of the maximum external profile diameter of blade is near wheel disc side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420801696.3U CN204371773U (en) | 2014-12-16 | 2014-12-16 | Centrifugal fan impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420801696.3U CN204371773U (en) | 2014-12-16 | 2014-12-16 | Centrifugal fan impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204371773U true CN204371773U (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420801696.3U Active CN204371773U (en) | 2014-12-16 | 2014-12-16 | Centrifugal fan impeller |
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| CN (1) | CN204371773U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640752A (en) * | 2016-12-19 | 2017-05-10 | 宁波方太厨具有限公司 | Impeller of kitchen ventilator |
| CN107762985A (en) * | 2016-08-16 | 2018-03-06 | 韩华泰科株式会社 | Centrifugal compressor |
| CN109899319A (en) * | 2019-04-08 | 2019-06-18 | 中山宜必思科技有限公司 | A kind of backward centrifugal wind wheel |
| CN111350689A (en) * | 2018-12-24 | 2020-06-30 | 宏碁股份有限公司 | Fan blade and fan structure |
| WO2020206918A1 (en) * | 2019-04-08 | 2020-10-15 | 中山宜必思科技有限公司 | Backward centrifugal fan |
| US11353041B2 (en) | 2018-12-07 | 2022-06-07 | Acer Incorporated | Blade and fan structure |
-
2014
- 2014-12-16 CN CN201420801696.3U patent/CN204371773U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762985A (en) * | 2016-08-16 | 2018-03-06 | 韩华泰科株式会社 | Centrifugal compressor |
| CN107762985B (en) * | 2016-08-16 | 2021-01-05 | 韩华压缩机株式会社 | Centrifugal compressor |
| CN106640752A (en) * | 2016-12-19 | 2017-05-10 | 宁波方太厨具有限公司 | Impeller of kitchen ventilator |
| CN106640752B (en) * | 2016-12-19 | 2023-08-18 | 宁波方太厨具有限公司 | Kitchen ventilator impeller |
| US11353041B2 (en) | 2018-12-07 | 2022-06-07 | Acer Incorporated | Blade and fan structure |
| CN111350689A (en) * | 2018-12-24 | 2020-06-30 | 宏碁股份有限公司 | Fan blade and fan structure |
| CN109899319A (en) * | 2019-04-08 | 2019-06-18 | 中山宜必思科技有限公司 | A kind of backward centrifugal wind wheel |
| WO2020206918A1 (en) * | 2019-04-08 | 2020-10-15 | 中山宜必思科技有限公司 | Backward centrifugal fan |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |