CN205173054U - Centrifugal fan blade and centrifugal fan - Google Patents
Centrifugal fan blade and centrifugal fan Download PDFInfo
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- CN205173054U CN205173054U CN201520805099.2U CN201520805099U CN205173054U CN 205173054 U CN205173054 U CN 205173054U CN 201520805099 U CN201520805099 U CN 201520805099U CN 205173054 U CN205173054 U CN 205173054U
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- 238000005119 centrifugation Methods 0.000 claims abstract description 23
- 230000008676 import Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005534 acoustic noise Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides a centrifugation fan blade and centrifugal fan. The centrifugal fan blade comprises a front cover plate (10), a rear cover plate (20) and a plurality of blades (30) arranged between the front cover plate (10) and the rear cover plate (20), wherein the blade-shaped entrance angle at the joint of the blades (30) and the front cover plate (10) is beta a 1; the blade-shaped inlet angle at the joint of the blade (30) and the rear cover plate (20) is beta b1, wherein beta a1 < beta b 1. The utility model discloses a make blade (30) and front shroud (10) junction's blade profile entrance angle be less than blade (30) and back shroud (20) junction's blade profile entrance angle to can reduce the impact loss of air current in the import department, noise reduction improves the pneumatic efficiency of fan blade.
Description
Technical field
The utility model relates to centrifugal blower field, in particular to a kind of centrifugation blade and centrifugal blower.
Background technique
In prior art, the backward centrifugation blade of courtyard machine to back shroud entrance edge of blade from front shroud along the circumferential direction without significant change, is unfavorable for reducing equipment acoustic noise, and is unfavorable for improving tonequality in phase angle; The less easy generation air-flow stagnant area of angle of exit edge of blade and front shroud, reduces fan efficiency.
Model utility content
The utility model aims to provide a kind of centrifugation blade and the centrifugal blower that can improve reduction noise.
The utility model provides a kind of centrifugation blade, comprises front shroud, back shroud and is arranged on the multiple blades between front shroud and back shroud, and the blade profile Inlet cone angle of blade and front shroud joint is β a1; The blade profile Inlet cone angle of blade and back shroud joint is β b1, wherein, and β a1 < β b1.
Further, the blade profile Inlet cone angle of blade is the trend increased gradually along front shroud to back shroud direction.
Further, the blade profile chord length of blade is the trend increased gradually along front shroud to back shroud direction.
Further, blade is crossing with the first blade profile of front shroud joint and the second blade profile of blade and back shroud joint.
Further, the front acies of the first blade profile is positioned at the fan blade rotary side of the front acies of the second blade profile, and the fan blade derotation that the rear acies of the first blade profile is positioned at the rear acies of the second blade profile is changed one's position.
Further, the blade inlet edge of blade extends along sense of rotation from front shroud to back shroud, and curvature is in increase tendency gradually.
The utility model additionally provides a kind of centrifugal blower, comprises aforesaid centrifugation blade.
According to centrifugation blade of the present utility model and centrifugal blower, by the blade profile Inlet cone angle making the blade profile Inlet cone angle of blade and front shroud joint be less than blade and back shroud joint, thus the impact loss of air-flow in inlet can be reduced, reduce noise, improve fan blade pneumatic efficiency.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the schematic perspective view according to centrifugation blade of the present utility model;
Fig. 2 is according to the projection drawing of centrifugation blade of the present utility model in back shroud plane.
Description of reference numerals:
10, front shroud; 20, back shroud; 30, blade.
Embodiment
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As depicted in figs. 1 and 2, according to centrifugation blade of the present utility model, the multiple blades 30 comprising front shroud 10, back shroud 20 and be arranged between front shroud 10 and back shroud 20, blade 30 is β a1 with the blade profile Inlet cone angle of front shroud 10 joint; Blade 30 is β b1 with the blade profile Inlet cone angle of back shroud 20 joint, wherein, and β a1 < β b1.The utility model is less than the blade profile Inlet cone angle β b1 of blade 30 and back shroud 20 joint by making blade 30 with the blade profile Inlet cone angle β a1 of front shroud 10 joint, thus can reduce the impact loss of air-flow in inlet, reduces noise, improves fan blade pneumatic efficiency.
Preferably, the blade profile Inlet cone angle of blade 30 is the trend increased gradually along front shroud 10 to back shroud 20 direction, thus make blade profile Inlet cone angle meet Changing Pattern from front shroud 10 to back shroud 20 flow angle, more be conducive to reducing air-flow at the impact loss of blade 30 inlet and noise, improve fan blade pneumatic efficiency.
Further, shown in composition graphs 2, β a2 refers to the angle of the blade profile that blade is crossing with front shroud and impeller outer edge circumferencial direction, and β b2 refers to the angle of the blade profile that blade is crossing with back shroud and impeller outer edge circumferencial direction.Usually, between β a2, β b2 value 30 ~ 50 degree, and meet β b2> β a2.That is, the angle of exit edge of blade and front shroud is comparatively large, is weakened the fluid stagnation district of this position by the angle increasing blade and front shroud, thus improves fan blade pneumatic efficiency.
Shown in composition graphs 2, the blade profile chord length of blade 30 in the trend increased gradually, effectively can improve the workmanship ability of blade 30 along front shroud 10 to back shroud 20 direction, and then improves the efficiency of centrifugation blade.Particularly, in fig. 2, blade 30 is la1 with the blade profile chord length of front shroud 10 joint, blade 30 is lb1, lb1 > la1 with the blade profile chord length of back shroud 20 joint, and by front shroud 10 to back shroud 20, blade profile chord length increases gradually, improves blade 30 in workmanship ability.
As shown in Figure 2, blade 30 is crossing with the first blade profile la of front shroud 10 joint and the second blade profile lb of blade 30 and back shroud 20 joint.Particularly, the front acies of the first blade profile is positioned at the fan blade rotary side of the front acies of the second blade profile, and the fan blade derotation that the rear acies of the first blade profile is positioned at the rear acies of the second blade profile is changed one's position.Realize the blade profile dislocation on blade 30 diverse location, thus reach the effect improving tonequality, but also effectively can ensure that blade 30 and front shroud 10 have larger angle to avoid blade 30 and front shroud 10 joint to produce serious air-flow stagnant area, thus effectively improve fan blade efficiency.More effectively, the blade inlet edge of blade 30 extends from front shroud 10 to back shroud 20 along sense of rotation, and curvature is in increase tendency gradually, the blade profile on blade 30 diverse location can be made further misplace, improve tonequality, reduction noise.
The utility model additionally provides a kind of centrifugal blower, comprises aforesaid centrifugation blade, thus reduces centrifugal fan noise, improves tonequality, improves fan efficiency.
As can be seen from the above description, the utility model the above embodiments achieve following technique effect:
According to centrifugation blade of the present utility model and centrifugal blower, the blade profile Inlet cone angle of blade 30 and back shroud 20 joint is less than with the blade profile Inlet cone angle of front shroud 10 joint by making blade 30, thus the impact loss of air-flow in inlet can be reduced, reduce noise, improve fan blade pneumatic efficiency.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. a centrifugation blade, the multiple blades (30) comprising front shroud (10), back shroud (20) and be arranged between described front shroud (10) and back shroud (20), is characterized in that,
Described blade (30) is β a1 with the blade profile Inlet cone angle of described front shroud (10) joint;
Described blade (30) is β b1 with the blade profile Inlet cone angle of described back shroud (20) joint, wherein, and β a1 < β b1.
2. centrifugation blade according to claim 1, is characterized in that,
The blade profile Inlet cone angle of described blade (30) is the trend increased gradually along front shroud (10) to back shroud (20) direction.
3. centrifugation blade according to claim 1, is characterized in that,
The blade profile chord length of described blade (30) is the trend increased gradually along front shroud (10) to back shroud (20) direction.
4. centrifugation blade according to claim 1, is characterized in that,
Described blade (30) is crossing with the first blade profile of described front shroud (10) joint and the second blade profile of described blade (30) and described back shroud (20) joint.
5. centrifugation blade according to claim 4, is characterized in that,
The front acies of described first blade profile is positioned at the fan blade rotary side of the front acies of described second blade profile, and the fan blade derotation that the rear acies of described first blade profile is positioned at the rear acies of described second blade profile is changed one's position.
6. centrifugation blade according to any one of claim 1 to 5, is characterized in that,
The blade inlet edge of described blade (30) extends from front shroud (10) to back shroud (20) along sense of rotation, and curvature is in increase tendency gradually.
7. a centrifugal blower, comprises centrifugation blade, it is characterized in that, the centrifugation blade of described centrifugation blade according to any one of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805099.2U CN205173054U (en) | 2015-10-15 | 2015-10-15 | Centrifugal fan blade and centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805099.2U CN205173054U (en) | 2015-10-15 | 2015-10-15 | Centrifugal fan blade and centrifugal fan |
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| Publication Number | Publication Date |
|---|---|
| CN205173054U true CN205173054U (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520805099.2U Active CN205173054U (en) | 2015-10-15 | 2015-10-15 | Centrifugal fan blade and centrifugal fan |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275875A (en) * | 2015-10-15 | 2016-01-27 | 珠海格力电器股份有限公司 | Centrifugal fan blade and centrifugal fan |
| CN110360150A (en) * | 2019-07-08 | 2019-10-22 | 珠海格力电器股份有限公司 | Wind wheel, centrifugal fan and air conditioner indoor unit |
| CN114427543A (en) * | 2022-01-17 | 2022-05-03 | 泛仕达机电股份有限公司 | Bionic centrifugal wind wheel and centrifugal fan |
-
2015
- 2015-10-15 CN CN201520805099.2U patent/CN205173054U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275875A (en) * | 2015-10-15 | 2016-01-27 | 珠海格力电器股份有限公司 | Centrifugal fan blade and centrifugal fan |
| CN110360150A (en) * | 2019-07-08 | 2019-10-22 | 珠海格力电器股份有限公司 | Wind wheel, centrifugal fan and air conditioner indoor unit |
| CN110360150B (en) * | 2019-07-08 | 2020-08-21 | 珠海格力电器股份有限公司 | Wind wheel, centrifugal fan and air conditioner indoor unit |
| CN114427543A (en) * | 2022-01-17 | 2022-05-03 | 泛仕达机电股份有限公司 | Bionic centrifugal wind wheel and centrifugal fan |
| CN114427543B (en) * | 2022-01-17 | 2024-04-02 | 泛仕达机电股份有限公司 | Bionic centrifugal wind wheel and centrifugal fan |
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