CN111043075B - Backward centrifugal section improved centrifugal fan blade applied to centrifugal fan - Google Patents
Backward centrifugal section improved centrifugal fan blade applied to centrifugal fan Download PDFInfo
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- CN111043075B CN111043075B CN201911173394.XA CN201911173394A CN111043075B CN 111043075 B CN111043075 B CN 111043075B CN 201911173394 A CN201911173394 A CN 201911173394A CN 111043075 B CN111043075 B CN 111043075B
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- point
- wind wheel
- blade
- centrifugal
- centrifugal fan
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- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000002401 inhibitory effect Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a centrifugal fan blade with an improved backward centrifugal section, which is applied to a centrifugal fan, and comprises a wind wheel and arc-shaped blades distributed on the wind wheel, wherein the central line of each arc-shaped blade sequentially comprises a point A, a point B, a point C, a point D, a point E, a point F and a point G according to the direction from the inner side of the wind wheel to the outer side of the wind wheel; the diameter of the inscribed circle on the middle line of the point D is the largest; the improved blade profile of the fan blade ensures that the streamline of the wind flow flows out along the shape of the blade when the wind wheel works, reduces the resistance in the flow channel, ensures that the internal flow field is smoother when the fan rotates, is very beneficial to inhibiting the separation of air flow, improves the flow efficiency of the air flow, and effectively solves the problems of small work and high noise of the fan impeller.
Description
Technical Field
The invention relates to the technical field of centrifugal fan blades, in particular to a centrifugal fan blade with an improved backward centrifugal section, which is applied to a centrifugal fan.
Background
When the centrifugal fan blade works, the original blade profile of the existing centrifugal wind wheel is similar to the uniform-thickness blade profile, and when the impeller rotates, in the limited number of blades, streamline at the impeller flow passage can flow along the shape of the blade, but the air flow through the blade passage has axial vortex besides relative flow. The relative velocity of the gas at the impeller outlet is offset due to the presence of the axial vortices, rather than flowing out in the tangential direction of the blade outlet, i.e. the outlet airflow angle β2 is smaller than the blade outlet mounting angle β2a. This process directly affects the air-out efficiency of the fan blades, and the conventional centrifugal fan blades cause energy loss and noise problems for this reason.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a centrifugal fan blade with an improved backward centrifugal section, which is applied to a centrifugal fan.
The technical scheme adopted for solving the technical problems is as follows:
The centrifugal fan blade comprises a wind wheel and arc-shaped blades distributed on the wind wheel, wherein the central line of each arc-shaped blade sequentially comprises a point A, a point B, a point C, a point D, a point E, a point F and a point G according to the direction from the inner side of the wind wheel to the outer side of the wind wheel; the diameter of the inscribed circle on the middle line of the point D is the largest; The function relation between the inscribed circle diameter y of the corresponding point A, point B, point C, point D, point E, point F and point G in the arc-shaped blade and the ordinals (x=1, 2 and … 7) of the corresponding point A, point B, point C, point D, point E, point F and point G is y= -0.2833x 2 +2.1795x-K, wherein K is 0.4-1.2.
The beneficial effects of the invention are as follows: the improved blade profile of the fan blade ensures that the streamline of the wind flow flows out along the shape of the blade when the wind wheel works, reduces the resistance in the flow channel, ensures that the internal flow field is smoother when the fan rotates, is very beneficial to inhibiting the separation of air flow, improves the flow efficiency of the air flow, and effectively solves the problems of small work and high noise of the fan impeller.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a comparative schematic diagram of the working state of the present invention;
FIG. 4 is a comparative schematic of the test results of the present invention.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. In the following description, certain specific details are set forth in order to provide a thorough understanding of the application. While the application may be practiced without these specific details, it is possible that those skilled in the art will be able to more effectively introduce their operational nature to other persons of skill in the art using the descriptions and statements herein.
Referring to fig. 1 and 2, a centrifugal fan blade with an improved backward centrifugal cross section for a centrifugal fan comprises a wind wheel 1 and arc-shaped blades 2 distributed on the wind wheel 1.
The central line of the arc-shaped blade 2 sequentially comprises a point A, a point B, a point C, a point D, a point E, a point F and a point G according to the direction from the inner side of the wind wheel 1 to the outer side of the wind wheel 1.
The inscribed circle on the line in point D has the largest diameter.
The arc length among points A, B, C, D, E, F and G is as follows:
The functional relation between the inscribed circle diameters y corresponding to the points A, B, C, D, E, F and G in the arc-shaped blade 2 and the ordinals (x=1, 2 and …) of the points A, B, C, D, E, F and G is y= -0.2833x 2 +2.1795x-K, wherein K is 0.4-1.2. For example, the diameter y of the inscribed circle at point A in the arcuate vane 2, the number x at point A being 1, y being-0.2833X 2 +2.1795X 1-K; the inscribed circle diameter y at the point E of the arc-shaped blade 2 has a sequence number x of 5 and y of-0.2833 × 2 +2.1795 ×5-K.
The newly designed blade structure is characterized in that the appearance is like the appearance of fish, and the appearance curve is improved, so that the streamline flows out along the shape of the arc-shaped blade 2, and the resistance in the runner is reduced. The internal flow field is smoother when the fan rotates, which is very beneficial to inhibiting the separation of air flow, improving the flow efficiency of air flow and effectively solving the problems of small work and large noise of the fan impeller. The fan can greatly improve the function of the fan and reduce the noise of the fan, and can be widely applied to the field of air purifiers.
The present invention is also capable of suitable alterations and modifications in the above-described embodiments, in light of the above principles. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention.
The following are embodiments of the new centrifugal fan blade technology, wherein references herein to "embodiments" refer to particular features, structures, or characteristics that may be included in at least one implementation of the present application. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
In example 1, the diameter of the wind wheel is 226mm:
the diameter phi A corresponding to the point A of the arc-shaped blade in the wind wheel is 130mm,
Point a corresponds to y=2.06 mm;
example 2, wind wheel diameter 225mm:
the diameter phi A corresponding to the point A of the arc-shaped blade in the wind wheel is 127.9mm,
Point a corresponds to y=1.88 mm;
example 3, wind wheel diameter 224mm:
the diameter phi A corresponding to the point A of the arc-shaped blade in the wind wheel is 127.8mm,
Point a corresponds to y=1.65 mm;
example 4, wind wheel diameter 222mm:
the diameter phi A corresponding to the point A of the arc-shaped blade in the wind wheel is 127.7mm,
Point a corresponds to y=1.42 mm;
Example 5, wind wheel diameter 220mm:
the diameter phi A corresponding to the point A of the arc-shaped blade in the wind wheel is 127.6mm,
Point a corresponds to y=1.26 mm.
As proved by practice, taking the fan blade of L266-119 as an example, the new blade and the original blade are compared and the performance data is shown in figure 3.
From the noise-air volume test data in FIG. 4, the noise is reduced by 2dB under the same air volume in the middle and high grade of the new blade, and the power is reduced by 5w to more than 10% of the original power. While other gears substantially maintain a noise advantage of over 2 db.
Claims (1)
1. Be applied to centrifugal fan's centrifugal fan blade of backward centrifugal section improvement formula, including wind wheel (1) and arc blade (2) of distribution on wind wheel (1), its characterized in that:
the central line of the arc-shaped blade (2) sequentially comprises a point A, a point B, a point C, a point D, a point E, a point F and a point G according to the direction from the inner side of the wind wheel (1) to the outer side of the wind wheel (1);
the diameter of the inscribed circle on the middle line of the point D is the largest;
The function relation between the inscribed circle diameter y corresponding to the point A, the point B, the point C, the point D, the point E, the point F and the point G in the arc-shaped blade (2) and the ordinal number x of the point A, the point B, the point C, the point D, the point E, the point F and the point G is y= -0.2833x 2 +2.1795x-K, wherein K is 0.4-1.2, and x=1, 2 and ….
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911173394.XA CN111043075B (en) | 2019-11-26 | 2019-11-26 | Backward centrifugal section improved centrifugal fan blade applied to centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911173394.XA CN111043075B (en) | 2019-11-26 | 2019-11-26 | Backward centrifugal section improved centrifugal fan blade applied to centrifugal fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111043075A CN111043075A (en) | 2020-04-21 |
| CN111043075B true CN111043075B (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911173394.XA Active CN111043075B (en) | 2019-11-26 | 2019-11-26 | Backward centrifugal section improved centrifugal fan blade applied to centrifugal fan |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211737550U (en) * | 2019-11-26 | 2020-10-23 | 广东顺威精密塑料股份有限公司 | Backward centrifugal cross-section noise reduction type centrifugal fan blade |
| CN211737551U (en) * | 2019-11-26 | 2020-10-23 | 广东顺威精密塑料股份有限公司 | Backward centrifugal section resistance-reducing centrifugal fan blade |
| CN211737552U (en) * | 2019-11-26 | 2020-10-23 | 广东顺威精密塑料股份有限公司 | Centrifugal fan blade with improved backward centrifugal section |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208442081U (en) * | 2018-07-17 | 2019-01-29 | 珠海格力电器股份有限公司 | Air treatment equipment, fan and centrifugal fan blade thereof |
| CN108825552B (en) * | 2018-07-17 | 2023-10-03 | 珠海格力电器股份有限公司 | Air treatment equipment, fan and centrifugal fan blade thereof |
| 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 |
-
2019
- 2019-11-26 CN CN201911173394.XA patent/CN111043075B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211737550U (en) * | 2019-11-26 | 2020-10-23 | 广东顺威精密塑料股份有限公司 | Backward centrifugal cross-section noise reduction type centrifugal fan blade |
| CN211737551U (en) * | 2019-11-26 | 2020-10-23 | 广东顺威精密塑料股份有限公司 | Backward centrifugal section resistance-reducing centrifugal fan blade |
| CN211737552U (en) * | 2019-11-26 | 2020-10-23 | 广东顺威精密塑料股份有限公司 | Centrifugal fan blade with improved backward centrifugal section |
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| Publication number | Publication date |
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| CN111043075A (en) | 2020-04-21 |
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