CN204299949U - Centrifugal impeller and centrifugal blower - Google Patents
Centrifugal impeller and centrifugal blower Download PDFInfo
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- CN204299949U CN204299949U CN201420640195.1U CN201420640195U CN204299949U CN 204299949 U CN204299949 U CN 204299949U CN 201420640195 U CN201420640195 U CN 201420640195U CN 204299949 U CN204299949 U CN 204299949U
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Abstract
The utility model provides a kind of centrifugal impeller and centrifugal blower.According to centrifugal impeller of the present utility model, comprise wheel hub and multiple blade, each blade has multiple lateral cross section of the axis perpendicular to centrifugal impeller, and the molded line of multiple lateral cross section comprises multiple wing molded line.According to centrifugal impeller of the present utility model and centrifugal blower, multiple wing molded line is comprised perpendicular to multiple lateral cross section of the axis of centrifugal impeller by making blade, make blade have better aeroperformance, reduce air-flow to the impact of blade, effectively reduce noise during centrifugal impeller work.
Description
Technical field
The utility model relates to blower fan field, in particular to a kind of centrifugal impeller and centrifugal blower.
Background technique
Centrifugal impeller, as a kind of fan important in heat-exchange ventilating system, is widely used in industrial every profession and trade.In air conditioner ventilation field, the many heat exchange blower fans as cabinet type air conditioner indoor machine of centrifugal impeller.
In prior art, the design experiences of centrifugal impeller generally all based on industrial ventilation field, in industrial ventilation field, the design objective major concern drafting efficiency of centrifugal impeller; And in field of air conditioning, along with people are to the pursuit of comfortable life, the performance index of air-conditioning noise are required more and more stricter, higher requirement is proposed to centrifugal impeller design noise specification.The vane type line of centrifugal impeller is very large to impeller noise effect, and conventional centrifugal profile of impeller vane, in order to industry is easily manufactured, usually adopts simple circle camber or board-type, do not walk according to air-flow the best in blade passage and always design vane type line.
Model utility content
The utility model aims to provide a kind of centrifugal impeller and the centrifugal blower that reduce noise.
The utility model provides a kind of centrifugal impeller, comprises wheel hub and multiple blade, and each blade has multiple lateral cross section of the axis perpendicular to centrifugal impeller, and the molded line of multiple lateral cross section comprises multiple wing molded line.
Further, multiple wing molded line comprises NACA0009 and NACA0016.
Further, smooth transition between multiple lateral cross section.
Further, multiple blade adopts porous fibre metal material.
Further, each blade has the longitudinal cross-section of the axis being parallel to centrifugal impeller, and longitudinal cross-section is serpentine.
Further, outside by the center axis of centrifugal impeller, the amplitude of the longitudinal cross-section of the serpentine of blade increases gradually.
Further, each lateral cross section has blade center line, and blade center line is straight line or camber line.
The utility model additionally provides a kind of centrifugal blower, comprises motor and centrifugal impeller, and centrifugal impeller is aforesaid centrifugal impeller.
According to centrifugal impeller of the present utility model and centrifugal blower, multiple wing molded line is comprised perpendicular to multiple lateral cross section of the axis of centrifugal impeller by making blade, make blade have better aeroperformance, reduce air-flow to the impact of blade, effectively reduce noise during centrifugal impeller work.
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 working principle schematic diagram according to centrifugal impeller of the present utility model;
Fig. 2 is the air current flow schematic diagram according to blade of the present utility model;
Fig. 3 is according to the air-flow of the centrifugal impeller of the present utility model flow schematic diagram around blade;
Fig. 4 is the perspective view according to centrifugal impeller of the present utility model;
Fig. 5 is according to the perspective view in the axial direction of two in multiple lateral cross section of centrifugal impeller of the present utility model;
Fig. 6 is the perspective view of the multiple blades according to centrifugal impeller of the present utility model;
Fig. 7 is the perspective view of a blade in Fig. 6.
Description of reference numerals:
10, wheel hub; 20, blade; 21, lateral cross section; 22, longitudinal cross-section; 23, blade center line.
Embodiment
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As shown in Fig. 1 to 7, according to centrifugal impeller of the present utility model, comprise wheel hub 10 and multiple blade 20, each blade 20 has multiple lateral cross section 21 of the axis perpendicular to centrifugal impeller, the molded line of multiple lateral cross section 21 comprises multiple wing molded line, the utility model comprises multiple wing molded line by making blade perpendicular to multiple lateral cross section 21 of the axis of centrifugal impeller, namely each blade 20 adopts multiple wing molded line, blade is made to have better aeroperformance, reduce air-flow to the impact of blade, effectively reduce noise during centrifugal impeller work.Wherein, the molded line of blade is the shape of leaf cross-section.
Particularly, the centrifugal impeller working principle shown in composition graphs 1 and Fig. 3 air current flow schematic diagram, air-flow by axially entering, then turns to 90 °, is discharged by impeller radial direction.Air-flow is in blades flows process, and air-flow relative vane surface has certain angle of attack, impacts loss, and impacts blade and produce certain noise.When the molded line of blade 20 is wing molded line, air-flow enters blade passage (passages between adjacent two blades) by radial direction, the relative movement of air-flow in runner can be seen as air-flow and flow around air flow over blade, at each axial position of blade 20, the flowing state of air-flow around aircraft wing can be equivalent to.Aircraft is as transatmospheric vehicle, it runs extreme high reliability, require that its wing Profile Design must possess extraordinary aeroperformance, therefore the wing Profile Design of aircraft is applied on centrifugal impellers blades Profile Design, use the good aeroperformance of wing molded line, make the aeroperformance that centrifugal impeller has had.
Further, shown in composition graphs 2 and Fig. 3, due at air-flow in same runner, axially different position air current flow is inconsistent, thus can according to the air-flow of each axial position (i.e. lateral cross section 21), select corresponding wing molded line, air current flow phenomenon in impeller channel can be improved further, obtain higher impeller aeroperformance.Preferably, part between multiple wing molded line by three-dimensional matching, smooth transition, thus form complete blade 20, further can improve the phenomenons such as the flow separation in impeller channel, blade surface boundary layer separation, and then improve the aerodynamic noise of impeller.
The molded line projection of two lateral cross section as shown in Figure 5, one of them lateral cross section adopts NACA0009, another lateral cross section to adopt NACA0016, corresponding wing molded line is selected according to airflow characteristic in runner, make air-flow when blades flows as far as possible, make air-flow relative velocity in blade passage be 0 to the angle of attack of blade surface as far as possible, reduce air-flow to the impact loss of blade, and reduce the noise of gas shock blade generation, there is boundary layer separation less around blade suction surface side in air-flow as far as possible.
Preferably, as shown in Figure 6 and Figure 7, each blade 20 has the longitudinal cross-section 22 of the axis being parallel to centrifugal impeller, and longitudinal cross-section 22, in serpentine, can reduce turbulence noise.More preferably, outside by the center axis of centrifugal impeller, the amplitude of the longitudinal cross-section 22 of the serpentine of blade 20 increases gradually, namely the longitudinal cross-section 22 of blade 20 is transitioned into serpentine by approximate slab gradually from center axis, adopt above-mentioned design, in the runner on the one hand between the convenient air-flow radial inflow axially flowed into adjacent two blades; On the other hand, further turbulence noise can be reduced.
More preferably, in order to further reduce noise, multiple blade 20 adopts the porous fibre metal material with sqouynd absorption lowering noise effect.
Shown in composition graphs 2, each lateral cross section 21 has blade center line 23 (Fig. 2 cathetus AB), and blade center line 23 is straight line or camber line.Namely on blade center line 23, superpose corresponding profile thickness, thus form aerofoil profile molded line, thus make blade have the draft capacity of common blade, there is again the aeroperformance of airfoil fan, reduce noise.
The utility model additionally provides a kind of centrifugal blower, comprises motor and centrifugal impeller, and centrifugal impeller is aforesaid centrifugal impeller, thus effectively can reduce the impact of air-flow to blade, reduces centrifugal blower noise, promotes fan efficiency.
As can be seen from the above description, the utility model the above embodiments achieve following technique effect:
According to centrifugal impeller of the present utility model and centrifugal blower, multiple wing molded line is comprised perpendicular to multiple lateral cross section of the axis of centrifugal impeller by making blade, make blade have better aeroperformance, reduce air-flow to the impact of blade, effectively reduce noise during centrifugal impeller work.
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 (8)
1. a centrifugal impeller, comprise wheel hub (10) and multiple blade (20), it is characterized in that, each described blade (20) has the multiple lateral cross section (21) perpendicular to the axis of described centrifugal impeller, and the molded line of described multiple lateral cross section (21) comprises multiple wing molded line.
2. centrifugal impeller according to claim 1, is characterized in that,
Described multiple wing molded line comprises NACA0009 and NACA0016.
3. centrifugal impeller according to claim 1, is characterized in that,
Smooth transition between described multiple lateral cross section (21).
4. centrifugal impeller according to claim 1, is characterized in that,
Described multiple blade (20) adopts porous fibre metal material.
5. centrifugal impeller according to claim 1, is characterized in that,
Each described blade (20) has the longitudinal cross-section (22) of the axis being parallel to described centrifugal impeller, and described longitudinal cross-section (22) are in serpentine.
6. centrifugal impeller according to claim 5, is characterized in that,
Outside by the center axis of described centrifugal impeller, the amplitude of the described longitudinal cross-section (22) of the serpentine of described blade (20) increases gradually.
7. centrifugal impeller according to claim 1, is characterized in that,
Each described lateral cross section (21) has blade center line (23), and described blade center line (23) is straight line or camber line.
8. a centrifugal blower, comprises motor and centrifugal impeller, it is characterized in that, the centrifugal impeller of described centrifugal impeller according to any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420640195.1U CN204299949U (en) | 2014-10-29 | 2014-10-29 | Centrifugal impeller and centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420640195.1U CN204299949U (en) | 2014-10-29 | 2014-10-29 | Centrifugal impeller and centrifugal blower |
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| Publication Number | Publication Date |
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| CN204299949U true CN204299949U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420640195.1U Active CN204299949U (en) | 2014-10-29 | 2014-10-29 | Centrifugal impeller and centrifugal blower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389816A (en) * | 2014-10-29 | 2015-03-04 | 珠海格力电器股份有限公司 | Centrifugal impeller and centrifugal fan |
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2014
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389816A (en) * | 2014-10-29 | 2015-03-04 | 珠海格力电器股份有限公司 | Centrifugal impeller and centrifugal fan |
| CN104389816B (en) * | 2014-10-29 | 2019-03-12 | 珠海格力电器股份有限公司 | Centrifugal impeller and centrifugal blower |
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| GR01 | Patent grant |