CN111043075A - Centrifugal fan blade with improved backward centrifugal section - Google Patents
Centrifugal fan blade with improved backward centrifugal section Download PDFInfo
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- CN111043075A CN111043075A CN201911173394.XA CN201911173394A CN111043075A CN 111043075 A CN111043075 A CN 111043075A CN 201911173394 A CN201911173394 A CN 201911173394A CN 111043075 A CN111043075 A CN 111043075A
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- wind wheel
- blade
- arc
- point
- centrifugal
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- 238000005119 centrifugation Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
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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
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- 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 an improved centrifugal fan blade with a backward centrifugal section, which 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, B, C, D, E, F, G from the inner side of the wind wheel to the outer side of the wind wheel; the diameter of an inscribed circle on the center line of the point D is the largest; the improved blade profile of the fan enables the streamline of the wind flow to flow out along the shape of the blade when the wind wheel works, reduces the resistance in the flow channel, enables the internal flow field to be smoother when the fan rotates, is very beneficial to inhibiting the airflow separation, improves the flow efficiency of the airflow, and effectively solves the problems of small work of the fan impeller, high noise and the like.
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.
Background
When the centrifugal fan blade works, the original blade profile of the existing centrifugal wind wheel is similar to an equal-thickness blade profile, when an impeller rotates, in the limited number of blades, streamline at the position of an impeller flow channel can flow along the shape of the blades, but gas flows through the blade channel and also has axial vortex, due to the existence of the axial vortex, the relative speed of the gas at the outlet of the impeller deviates and the gas does not flow out along the tangential direction of the outlet of the blades, namely, the outlet airflow angle β 2 is smaller than the blade outlet installation angle β 2A, the process directly influences the air outlet efficiency of the fan blade, and the problems of energy loss and noise are caused by the conventional centrifugal fan blade.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a centrifugal fan blade with an improved backward centrifugal section.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a centrifugal fan blade with an improved backward centrifugal section comprises a wind wheel and arc-shaped blades distributed on the wind wheel, wherein the center line of each arc-shaped blade sequentially comprises A, B, C, D, E, F, G from the inner side of the wind wheel to the outer side of the wind wheel; the diameter of an inscribed circle on the center line of the point D is the largest;
the function relation between the diameter y of the inscribed circle corresponding to each point A to G in the arc-shaped blade and the ordinal number (x is 1, 2 and … 7) corresponding to each point A to G is that y is-0.2833 x2+2.1795x-K, wherein K is 0.4-1.2. The invention has the beneficial effects that: the improved blade profile of the fan enables the streamline of the wind flow to flow out along the shape of the blade when the wind wheel works, reduces the resistance in the flow channel, enables the internal flow field to be smoother when the fan rotates, is very beneficial to inhibiting the airflow separation, improves the flow efficiency of the airflow, and effectively solves the problems of small work of the fan impeller, high noise and the like.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a comparison of the working conditions of the present invention;
FIG. 4 is a comparative graph showing the results of the test according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the invention can be practiced without these specific details, i.e., those skilled in the art can more effectively describe the nature of their work to others skilled in the art using the description and illustrations herein.
Referring to fig. 1 and 2, a centrifugal fan blade with an improved backward centrifugal section comprises a wind wheel 1 and arc-shaped blades 2 distributed on the wind wheel 1.
The midline of the arc-shaped blade 2 sequentially comprises A, B, C, D, E, F, G 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 midline of the point D is the largest.
A. B, C, D, E, F, G the arc length between points is as follows:
the functional relation between the diameter y of the inscribed circle corresponding to each point A to G in the arc-shaped blade 2 and the ordinal number (x is 1, 2 and … 7) corresponding to each point A to G is that y is-0.2833 x2+2.1795x-K, wherein K is 0.4-1.2. For example, the diameter y of an inscribed circle at the point A of the arc-shaped blade 2, the serial number x of the point A is 1, and y is-0.2833 multiplied by 12+2.1795X 1-K; the diameter y of an inscribed circle at the point E of the arc-shaped blade 2, the serial number x of the point E is 5, and y is-0.2833 multiplied by 52+2.1795×5-K。
The newly designed blade structure is like a fish shape in appearance, 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 flow channel is reduced. The internal flow field is smoother when the fan rotates, the air flow separation is favorably inhibited, the flow efficiency of the air flow is improved, and the problems of small work of the fan impeller, high noise and the like are effectively solved. The fan power capability can be greatly improved, the fan noise can be reduced, and the fan power device can be widely applied to the field of air purifiers.
The present invention can be modified and adapted appropriately from the above-described embodiments, according to the principles described above. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention.
The following are examples of novel centrifugal fan blade technology, wherein "examples" as referred to herein 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 "an embodiment" 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.
Example 1, the diameter of the rotor is 226 mm:
the diameter phi A corresponding to the arc-shaped blade A point in the wind wheel is 130mm,
point a corresponds to y 2.06 mm;
example 2, rotor diameter 225 mm:
the diameter phi A corresponding to the arc-shaped blade A point in the wind wheel is 127.9mm,
point a corresponds to y 1.88 mm;
example 3, rotor diameter 224 mm:
the diameter phi A corresponding to the arc-shaped blade A point in the wind wheel is 127.8mm,
point a corresponds to y 1.65 mm;
example 4, rotor diameter 222 mm:
the diameter phi A corresponding to the arc-shaped blade A point in the wind wheel is 127.7mm,
point a corresponds to y 1.42 mm;
example 5, the rotor diameter was 220 mm:
the diameter phi A corresponding to the arc-shaped blade A point in the wind wheel is 127.6mm,
point a corresponds to y 1.26 mm.
Proved by practice, taking the fan blade of L266-119 as an example, the performance data of the new blade compared with the original blade experiment is shown in figure 3.
From the noise-air volume test data in fig. 4, it can be found that the noise in the new blade is reduced by 2dB at the same air volume at the middle and high levels, and the power is reduced by 5w, which is more than 10% of the original power. While other gears substantially maintain a noise advantage above 2 db.
Claims (1)
1. The utility model provides a to centrifugal cross-section improvement type centrifugation fan blade of back, includes wind wheel (1) and arc blade (2) of distribution on wind wheel (1), its characterized in that:
the center line of the arc-shaped blade (2) sequentially comprises A, B, C, D, E, F, G from the inner side of the wind wheel (1) to the outer side of the wind wheel (1);
the diameter of an inscribed circle on the center line of the point D is the largest;
the function relation between the diameter y of the inscribed circle corresponding to each point A to G in the arc-shaped blade (2) and the ordinal number (x is 1, 2 and … 7) corresponding to each point A to G is that y is-0.2833 x2+2.1795x-K, wherein K is 0.4-1.2.
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 true CN111043075A (en) | 2020-04-21 |
| CN111043075B CN111043075B (en) | 2024-07-02 |
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Family Applications (1)
| 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825552A (en) * | 2018-07-17 | 2018-11-16 | 珠海格力电器股份有限公司 | Air treatment equipment, fan and centrifugal fan blade thereof |
| 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 |
| 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 |
| 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 |
| 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 |
-
2019
- 2019-11-26 CN CN201911173394.XA patent/CN111043075B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825552A (en) * | 2018-07-17 | 2018-11-16 | 珠海格力电器股份有限公司 | Air treatment equipment, fan and centrifugal fan blade thereof |
| 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 |
| 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 |
| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN111043075B (en) | 2024-07-02 |
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