CN109162961B - Centrifugal fan blade - Google Patents
Centrifugal fan blade Download PDFInfo
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- CN109162961B CN109162961B CN201811271432.0A CN201811271432A CN109162961B CN 109162961 B CN109162961 B CN 109162961B CN 201811271432 A CN201811271432 A CN 201811271432A CN 109162961 B CN109162961 B CN 109162961B
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- fan blade
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- blade
- guide ring
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Abstract
The invention provides a centrifugal fan blade, comprising: a wind turbine hub having a hub flange; the annular fan blade guide ring is coaxially arranged with the fan blade hub, a blade mounting space is formed between the annular fan blade guide ring and the hub flange, and an air inlet opening is formed in the center of the fan blade guide ring; the fan blade is arranged in the blade installation space, and two sides of the fan blade are respectively connected with the hub flange and the fan blade guide ring; the wind wheel hub is provided with a wind guide piece which is convexly arranged towards the wind inlet opening of the fan blade flow guide ring, and a hub wind guide angle A is formed between the inclined plane of the wind guide piece and the plane of the wind wheel hub; the angle range of the air guide angle A of the hub is more than or equal to 100 degrees and less than or equal to 140 degrees. By applying the technical scheme of the invention, the proper fan blade angle value of the centrifugal blade is designed in a targeted manner, and the centrifugal blade with lower noise is obtained.
Description
The invention relates to a divisional application of an invention patent with the application date of 2014, 05 and 14, the application number of 201410204447.0 and the name of centrifugal fan blade.
Technical Field
The invention relates to the field of air conditioners, in particular to a centrifugal fan blade.
Background
At present, the backward centrifugal fan blade is mainly applied to a courtyard machine air conditioning unit. The backward centrifugal fan blade is supplied with air by the fan blade flow guide ring and then is discharged with air from the middle of the flow guide ring and the hub, and the flow field of the air is turned by 90 degrees in the whole process. The design of wind guide in the backward centrifugal fan blade is directly related to whether the wind field is smooth or not, and the noise value of the fan system is influenced.
The wind part coming from the guide ring in the fan blade is guided by the inclined plane on the hub, so that the design of the wind guiding angle needs to be reasonable. In addition to the wind guiding effect of the wind impeller hub, the blades of the backward centrifugal fan blade separate the wind, which directly affects the fluency of the wind field.
For the existing backward centrifugal fan blade, the noise value is relatively large because the wind guiding angle of the hub of the fan blade, the elevation angle of the front edge of the fan blade and the front edge angle of the fan blade are not optimized in a targeted manner.
Disclosure of Invention
The invention aims to provide a centrifugal fan blade to solve the problem that the noise value of a backward centrifugal fan blade in the prior art is large.
In order to achieve the above object, the present invention provides a centrifugal fan blade, comprising: a wind turbine hub having a hub flange; the annular fan blade guide ring is coaxially arranged with the fan blade hub, a blade mounting space is formed between the annular fan blade guide ring and the hub flange, and an air inlet opening is formed in the center of the fan blade guide ring; the fan blade is arranged in the blade installation space, and two sides of the fan blade are respectively connected with the hub flange and the fan blade guide ring; the wind wheel hub is provided with a wind guide piece which is convexly arranged towards the wind inlet opening of the fan blade flow guide ring, and a hub wind guide angle A is formed between the inclined plane of the wind guide piece and the plane of the wind wheel hub; the angle range of the air guide angle A of the hub is more than or equal to 100 degrees and less than or equal to 140 degrees.
Further, the angle of the hub wind guiding angle a is 120 °.
Furthermore, the blade of the fan blade is provided with a convex sharp angle towards the air inlet direction, a blade front edge elevation angle B is formed between the lower edge line of the sharp angle and the plane of the wind wheel hub, and the angle range of the blade front edge elevation angle B is more than or equal to 40 degrees and less than or equal to 60 degrees.
Further, the angle of the elevation angle B of the leading edge of the blade is 50 °.
Furthermore, the blade of the fan blade is provided with a convex sharp angle towards the air inlet direction, a blade leading edge angle C is arranged between the edge lines of the upper edge and the lower edge of the sharp angle, and the angle range of the blade leading edge angle C is more than or equal to 45 degrees and less than or equal to 90 degrees.
Further, the angle of the blade leading edge angle C is 70 °.
By applying the technical scheme of the invention, the proper fan blade angle value of the centrifugal blade is designed in a targeted manner, and the centrifugal blade with lower noise is obtained.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of a centrifugal fan blade according to the present invention;
fig. 2 shows a schematic view of a hub wind guiding angle of the centrifugal fan blade according to the present invention; and
fig. 3 shows a schematic view of the leading edge elevation and leading edge angle of the centrifugal fan blade of the present invention.
Description of reference numerals:
1. a wind impeller hub; 2. a fan blade; 3. a fan blade flow guide ring; A. a hub wind angle; B. the leading edge elevation of the blade; C. the blade leading edge angle of the blade.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, the centrifugal fan blade of the present invention includes a fan blade hub 1, a fan blade 2 fixed on a hub flange plane of the fan blade hub 1, and an annular fan blade guide ring 3 connected to the other end of the fan blade 2. The annular fan blade guide ring 3 is coaxially arranged with the fan wheel hub 1, a blade installation space is formed between the annular fan blade guide ring 3 and the hub flange, and an opening for air inlet is formed in the center of the fan blade guide ring 3. An air outlet gap is formed between the plane of the fan blade guide ring 3 and the plane of a hub flange of the fan blade hub 1 for fixing the fan blade 2, the fan blade 2 is erected in the air outlet gap, and the fan blade 2 is fixed on the outer ring surface of the fan blade hub 1. The backward centrifugal fan blade is supplied with air from the center of the fan blade flow guide ring 3 and then is discharged with air from the air outlet gap between the fan blade flow guide ring 3 and the fan blade hub 1. In the whole process, the flow direction of the wind is turned by 90 degrees.
Referring to fig. 2 and 3, the wind part coming from the guide ring guides the wind by the inclined plane convexly arranged at the center of the wind impeller hub 1, which requires reasonable design of the wind guiding angle. The centrifugal fan blade is designed and tested in a targeted manner according to a hub wind guide angle A of the centrifugal fan blade formed between an inclined plane convexly arranged at the center of a hub and a hub plane, a blade front edge elevation angle B formed between a lower edge line of a front edge of a sharp corner protruding towards an air inlet direction of the fan blade 2 and the hub plane, and a blade front edge angle C formed between upper and lower edge lines of the sharp corner.
Experimental data:
when the rotational speed was 700r/min, only changed wheel hub angle of draught A, when other parameters were unchangeable, had following experimental data:
| hub wind guide angle A | Noise value |
| 80 | 48.4 |
| 90 | 48.3 |
| 100 | 48.1 |
| 120 | 48 |
| 140 | 48.5 |
| 145 | 48.7 |
| 150 | 48.8 |
When the rotating speed is 700r/min, only the front edge elevation angle B of the blade is changed, and when other parameters are unchanged, the following experimental data are shown:
| elevation angle B of blade leading edge | Noise value |
| 30 | 49.1 |
| 35 | 48.5 |
| 40 | 48.2 |
| 50 | 48.1 |
| 60 | 48.3 |
| 65 | 48.6 |
| 70 | 48.9 |
When the rotating speed is 700r/min, only the leading edge angle C of the blade is changed, and when other parameters are unchanged, the following experimental data are shown:
| blade leading edge angle C | Noise value |
| 34 | 48.9 |
| 40 | 48.6 |
| 45 | 48.3 |
| 70 | 48.1 |
| 90 | 48.2 |
| 95 | 48.4 |
| 100 | 48.5 |
The experiment proves that the following conclusions are provided: the effect of these angles on noise is not a linear rise and fall as traditionally thought, but rather there are peak-to-valley extremes that are difficult to predict prior to experimentation. The invention obtains the proper angle at the noise valley value through the targeted experiment.
The reasonable range of the wind guide angle A of the backward centrifugal wind impeller hub is as follows: a is more than or equal to 100 degrees and less than or equal to 140 degrees, the noise value is obviously increased after the A is less than 100 degrees and exceeds 140 degrees, the wind field is smoother in the angle range, and the noise value is reduced. The best effect is obtained when A is 120 degrees.
In addition to the wind guiding effect of the wind impeller hub, the blades of the backward centrifugal fan blade separate the wind, which directly affects the fluency of the wind field. The experiment proves that the following two conclusions are as follows:
the reasonable range of the front edge elevation angle B of the backward centrifugal fan blade is as follows: b is more than or equal to 40 degrees and less than or equal to 60 degrees, and the noise value is obviously increased after the B is less than 40 degrees and exceeds 60 degrees. The best effect is achieved when B is 50 degrees.
The reasonable range of the blade front edge angle C of the backward centrifugal fan blade is as follows: c is more than or equal to 45 degrees and less than or equal to 90 degrees, the noise value is obviously increased after the angle is less than 45 degrees and exceeds 90 degrees, and similarly, the wind field is smoother in the angle range, and the noise value is reduced. The best effect is achieved when the temperature is 70 ℃.
Therefore, the invention obtains a proper fan blade angle value and obtains a centrifugal blade with lower noise.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the invention adopts a reasonable wheel hub air guide angle, and the noise with the same air volume is reduced by 0.3dB (A) -0.7 dB (A) relative to the wheel hub air guide angle which is not in the range under the same configuration.
The invention adopts a reasonable elevation angle of the front edge of the blade, and compared with the elevation angle of the front edge of the blade which is not in the range, under the same configuration, the noise with the same air volume is reduced by 0.5dB (A) -1 dB (A).
The invention adopts a reasonable blade leading edge angle, and reduces the noise with the same air volume by 0.3dB (A) -0.8 dB (A) relative to the blade leading edge angle which is not in the range under the same configuration.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A centrifugal fan blade comprising:
a wind turbine hub (1) having a hub flange;
the fan blade guide ring (3) is coaxially arranged with the fan blade hub (1), a blade mounting space is formed between the fan blade guide ring and the hub flange, and an air inlet opening is formed in the center of the fan blade guide ring (3);
the fan blade (2) is arranged in the blade installation space, and two sides of the fan blade are respectively connected with the hub flange and the fan blade guide ring (3);
it is characterized in that the preparation method is characterized in that,
the fan blade guide ring is characterized in that the fan blade wheel hub (1) is provided with an air guide piece which is convexly arranged towards an air inlet opening of the fan blade guide ring (3), and a wheel hub air guide angle A is formed between the inclined surface of the air guide piece and the plane of the fan blade wheel hub (1); the fan blade (2) is provided with a convex sharp angle towards the air inlet direction, a blade leading edge angle C is arranged between the edge lines of the upper edge and the lower edge of the sharp angle, the angle range of the blade leading edge angle C is more than or equal to 45 degrees and less than or equal to 90 degrees, and the angle of the hub air guide angle A is 120 degrees.
2. The centrifugal fan blade according to claim 1 wherein the angle of the blade leading edge angle C is 70 °.
3. A centrifugal fan blade comprising:
a wind turbine hub (1) having a hub flange;
the fan blade guide ring (3) is coaxially arranged with the fan blade hub (1), a blade mounting space is formed between the fan blade guide ring and the hub flange, and an air inlet opening is formed in the center of the fan blade guide ring (3);
the fan blade (2) is arranged in the blade installation space, and two sides of the fan blade are respectively connected with the hub flange and the fan blade guide ring (3);
it is characterized in that the preparation method is characterized in that,
the fan blade guide ring is characterized in that the fan blade wheel hub (1) is provided with an air guide piece which is convexly arranged towards an air inlet opening of the fan blade guide ring (3), and a wheel hub air guide angle A is formed between the inclined surface of the air guide piece and the plane of the fan blade wheel hub (1); the fan blade (2) is provided with a convex sharp angle towards the air inlet direction, a blade leading edge elevation angle B is formed between the lower edge line of the sharp angle and the plane of the fan blade hub (1), the angle range of the blade leading edge elevation angle B is more than or equal to 40 degrees and less than or equal to 60 degrees, and the angle of the hub air guide angle A is 120 degrees.
4. The centrifugal fan blade according to claim 3, wherein the angle of the blade leading edge elevation angle B is 50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811271432.0A CN109162961B (en) | 2014-05-14 | 2014-05-14 | Centrifugal fan blade |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811271432.0A CN109162961B (en) | 2014-05-14 | 2014-05-14 | Centrifugal fan blade |
| CN201410204447.0A CN103967838B (en) | 2014-05-14 | 2014-05-14 | Centrifugation blade |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410204447.0A Division CN103967838B (en) | 2014-05-14 | 2014-05-14 | Centrifugation blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109162961A CN109162961A (en) | 2019-01-08 |
| CN109162961B true CN109162961B (en) | 2020-06-16 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410204447.0A Active CN103967838B (en) | 2014-05-14 | 2014-05-14 | Centrifugation blade |
| CN201811271432.0A Active CN109162961B (en) | 2014-05-14 | 2014-05-14 | Centrifugal fan blade |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410204447.0A Active CN103967838B (en) | 2014-05-14 | 2014-05-14 | Centrifugation blade |
Country Status (1)
| Country | Link |
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| CN (2) | CN103967838B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967838B (en) * | 2014-05-14 | 2019-03-19 | 珠海格力电器股份有限公司 | Centrifugation blade |
| CN105508296A (en) * | 2016-01-28 | 2016-04-20 | 珠海格力电器股份有限公司 | Air conditioner indoor unit, centrifugal fan-volute casing assembly and centrifugal fan |
| CN106640755A (en) * | 2017-01-13 | 2017-05-10 | 苏州弗来特金属制品有限公司 | Small-sized impeller for air suction of small and medium-sized direct current motors |
| CN109404337A (en) * | 2018-11-19 | 2019-03-01 | 珠海格力电器股份有限公司 | The assembly method of centrifugal wind wheel, air-conditioning and centrifugal wind wheel |
| CN109538529A (en) * | 2018-11-26 | 2019-03-29 | 珠海格力电器股份有限公司 | Centrifugation blade, courtyard machine and the air-conditioning system with it |
| CN109899318B (en) * | 2019-02-22 | 2021-03-30 | 宁波德业日用电器科技有限公司 | Vortex fan of new health air purifier |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6217285B1 (en) * | 1996-08-08 | 2001-04-17 | Sanyo Electric Co., Ltd. | Impeller for a centrifugal blower |
| JP3746253B2 (en) * | 2002-07-18 | 2006-02-15 | 松下エコシステムズ株式会社 | Fan filter unit |
| ITBO20020519A1 (en) * | 2002-08-02 | 2004-02-03 | Spal Srl | CENTRIFUGAL FAN IMPELLER EQUIPPED WITH BLADES |
| JP2007002708A (en) * | 2005-06-23 | 2007-01-11 | Fujitsu General Ltd | Turbo fan |
| JP4830519B2 (en) * | 2006-02-02 | 2011-12-07 | ダイキン工業株式会社 | Centrifugal fan |
| JP2009228499A (en) * | 2008-03-21 | 2009-10-08 | Daikin Ind Ltd | Air blower and air conditioner using the same |
| JP4612084B2 (en) * | 2008-08-29 | 2011-01-12 | 株式会社日立産機システム | Centrifugal fan and air fluid machine using the same |
| CN103174674A (en) * | 2013-04-02 | 2013-06-26 | 宁波朗迪叶轮机械有限公司 | Oblique flow centrifugal impeller for air conditioner |
| CN203175979U (en) * | 2013-04-03 | 2013-09-04 | 宁波朗迪叶轮机械有限公司 | Rear-tilting type centrifugal fan blade |
| CN103195754B (en) * | 2013-04-03 | 2015-11-25 | 武汉朗迪叶轮机械有限公司 | Inclined-flow centrifugal impeller |
| CN103967838B (en) * | 2014-05-14 | 2019-03-19 | 珠海格力电器股份有限公司 | Centrifugation blade |
| CN203867965U (en) * | 2014-05-14 | 2014-10-08 | 珠海格力电器股份有限公司 | Centrifugal fan |
-
2014
- 2014-05-14 CN CN201410204447.0A patent/CN103967838B/en active Active
- 2014-05-14 CN CN201811271432.0A patent/CN109162961B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109162961A (en) | 2019-01-08 |
| CN103967838B (en) | 2019-03-19 |
| CN103967838A (en) | 2014-08-06 |
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