CN107355425B - High noise cancellation degree axial flow fan blade - Google Patents
High noise cancellation degree axial flow fan blade Download PDFInfo
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- CN107355425B CN107355425B CN201710618094.2A CN201710618094A CN107355425B CN 107355425 B CN107355425 B CN 107355425B CN 201710618094 A CN201710618094 A CN 201710618094A CN 107355425 B CN107355425 B CN 107355425B
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- Prior art keywords
- blade
- shaped groove
- edge
- tail edge
- tail
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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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a high-noise-cancellation-degree axial flow fan blade, which comprises a hub and a blade arranged on the side part of the hub, wherein a V-shaped groove extending towards the central area of the blade is arranged in the middle of the tail edge of the blade, the length of a side line of the tail edge is L, the starting point of the V-shaped groove on the tail edge is positioned at the position of 0.55-0.64L of the side line of the tail edge, the ending point of the V-shaped groove on the tail edge is positioned at the position of 0.7-0.78L of the side line of the tail edge, and the depth of the V-shaped groove is 0.4-0.65L; the blades on two sides of the V-shaped groove are densely provided with a plurality of miniature silencing holes, and the aperture of each miniature silencing hole is 0.4-0.7 mm. Through opening V-shaped groove in the middle part position at the blade trailing edge, select the starting point and the recess degree of depth of V-shaped groove on the blade trailing edge, assist and set up intensive miniature noise elimination hole, can guide the quick circulation of air current to weaken the air current disorder of blade trailing edge department, and then reduce noise level, reduced noise volume under the circumstances of guaranteeing that blade air supply loss is not big.
Description
Technical Field
The invention relates to the technical field of axial flow fan blades, in particular to an axial flow fan blade with high noise elimination degree.
Background
The axial flow fan blade has very wide application in daily life, and the axial flow refers to the air flow flowing in the same direction with the axis of the fan blade, such as an electric fan and an air conditioner external fan, which are fans running in an axial flow mode. Axial fans with axial fans are generally used in occasions with higher flow requirements and lower pressure requirements, and are widely used in the field of air conditioning.
The common axial flow fan blade mainly comprises a hub and a plurality of blades arranged on the periphery of the hub, and the structure is simple, but the data parameter requirements of the detail structures of the axial flow fan blade are very high, and the operation and noise control of the axial flow fan blade are greatly influenced. In the related art, the detailed design of the axial flow fan blade is continuously enhanced, but the design of the low noise performance of the fan blade is still to be further improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing an axial flow fan blade capable of eliminating blade noise to a higher degree.
The invention provides an axial flow fan blade with high noise elimination degree, which comprises a hub and a blade arranged on the side part of the hub, wherein a V-shaped groove extending towards the central area of the blade is arranged in the middle of the tail edge of the blade, the length of a side line of the tail edge is L, the starting point of the V-shaped groove on the tail edge is positioned at the position of 0.55-0.64L of the side line of the tail edge, the end point of the V-shaped groove on the tail edge is positioned at the position of 0.7-0.78L of the side line of the tail edge, and the depth of the V-shaped groove is 0.4-0.65L; the blades on two sides of the V-shaped groove are densely provided with a plurality of miniature silencing holes, and the aperture of each miniature silencing hole is 0.4-0.7 mm.
Further, the micro silencing hole penetrates through the blade to be obliquely arranged, one end of the micro silencing hole, which is located on the windward side of the blade, is close to the tail edge of the blade, and one end of the micro silencing hole, which is located on the leeward side of the blade, is close to the front edge of the blade.
Further, continuous auxiliary silencing saw teeth are arranged on the inner side walls of the grooves on the two sides of the V-shaped groove.
Further, the outside limit of blade is close to blade trailing edge department and is provided with the anti-shake chimb, the width of anti-shake chimb is from blade leading edge one end to blade trailing edge one end progressively increases.
Further, the outer side of the anti-shake flange extends away from the leeward side of the blade.
The technical scheme of the invention has the beneficial effects that: through optimizing the blade structure of the axial fan blade, the V-shaped groove is formed in the middle of the tail edge of the blade, and the starting point and the groove depth of the V-shaped groove on the tail edge of the blade are proved to be selected for a long time, and dense miniature silencing holes are additionally arranged, so that air flow can be guided to rapidly circulate to weaken air flow disturbance at the tail edge of the blade, the noise degree is further reduced, and the noise volume is reduced under the condition that the air quantity loss of the blade is not great.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of an axial flow fan blade with high noise cancellation in an embodiment of the present invention;
fig. 2 is another structural diagram of an axial flow fan blade with high noise cancellation degree according to an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
Referring to fig. 1, the invention provides an axial flow fan blade with high noise cancellation degree, which comprises a hub 1 and a blade 2 arranged at the side part of the hub 1, wherein a V-shaped groove 4 extending towards the central area of the blade 2 is arranged in the middle of the tail edge 3 of the blade 2, the length of the edge line of the tail edge 3 is L, the starting point of the V-shaped groove 4 on the tail edge 3 is positioned at the position of 0.55-0.64L of the edge line of the tail edge 3, the end point of the V-shaped groove 4 on the tail edge 3 is positioned at the position of 0.7-0.78L of the edge line of the tail edge 3, and the depth of the V-shaped groove 4 is 0.4-0.65L; the blades 2 on the two sides of the V-shaped groove 4 are densely provided with a plurality of micro silencing holes 5, and the aperture of the micro silencing holes 5 is 0.4-0.7 mm.
Specifically, through optimizing the structure of the blade 2 of the axial fan blade, particularly, a V-shaped groove 4 is formed in the middle of the tail edge 3 of the blade 2, and the starting point and the groove depth of the V-shaped groove 4 on the tail edge 3 are selected through long-time demonstration, and dense miniature silencing holes 5 are additionally arranged, so that air flow can be guided to rapidly circulate, the air flow disturbance at the tail edge 3 of the blade is weakened, the noise degree is further reduced, and the noise amount is reduced under the condition that the air quantity loss of the blade is not great; the length L of the edge line of the tail edge 3 refers to the length of the complete edge line before the tail edge 3 is not notched in the V shape.
As one of the improvements, a micro noise elimination hole 5 is obliquely arranged penetrating through the blade 2, one end of the micro noise elimination hole 5 on the windward side of the blade 2 is close to the tail edge 3 of the blade, and one end of the micro noise elimination hole on the leeward side of the blade is close to the front edge 6 of the blade.
Specifically, the inclined mini-type silencing hole 5 forms an included angle smaller than 90 degrees with the windward surface of the blade, and the port at one end of the windward surface is opposite to the air inlet end of the blade, so that the loss of air quantity can be reduced as much as possible, partial vortex can be absorbed, and noise is eliminated.
As another improvement, in this embodiment, continuous auxiliary silencing saw teeth (not shown) are arranged on the inner side walls of the grooves on the two sides of the V-shaped groove 4.
As one improvement, the outer side edge of the blade 2 is provided with an anti-shake convex edge 7 near the blade tail edge 3, and the width of the anti-shake convex edge 7 gradually increases from one end of the blade front edge 6 to one end of the blade tail edge 3.
Specifically, when the blades 2 of the axial flow fan blade rotate at a high speed, noise is formed by continuous vibration due to the influence of high-speed air flow, vortex and the like, the air flow enters from one end of the front edge 4 of the blade and is axially blown out from one end of the rear edge 3 of the blade through the windward side of the blade at a high speed, and the gradually widened anti-vibration convex edge 5 has a certain inhibition effect on disordered disturbance of the turbulent air flow, so that the formation of partial noise can be reduced.
As one of the preferred embodiments, the outer side of the anti-vibration rim 7 extends offset to the leeward side of the blade 2. The outside edge of the anti-shake convex edge 7 extends towards the leeward side of the blade 2, has a drainage effect on the turbulent airflow at the edge of the windward side, and can reduce partial noise to a certain extent under the condition of ensuring that the air quantity is not changed greatly.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (3)
1. The utility model provides a high noise cancellation degree axial fan blade, includes wheel hub and sets up the blade of wheel hub lateral part, its characterized in that: the middle part of the tail edge of the blade is provided with a V-shaped groove extending towards the central area of the blade, the length of the edge line of the tail edge is L, the starting point of the V-shaped groove on the tail edge is positioned at the position of 0.55-0.64L of the edge line of the tail edge, the ending point of the V-shaped groove on the tail edge is positioned at the position of 0.7-0.78L of the edge line of the tail edge, and the depth of the V-shaped groove is 0.4-0.65L; the blades on two sides of the V-shaped groove are densely provided with a plurality of micro silencing holes, and the aperture of each micro silencing hole is 0.4-0.7 mm; the miniature silencing hole penetrates through the blade and is obliquely arranged, one end of the miniature silencing hole, which is positioned on the windward side of the blade, is close to the tail edge of the blade, and one end of the miniature silencing hole, which is positioned on the leeward side of the blade, is close to the front edge of the blade; the lateral side of blade is provided with the anti-shake chimb near blade trailing edge department, the width of anti-shake chimb is from blade leading edge one end to blade trailing edge one end increase gradually.
2. The high noise cancellation degree axial flow fan blade of claim 1, wherein continuous auxiliary silencing serrations are provided on inner side walls of both side grooves of the V-shaped groove.
3. The high noise cancellation degree axial flow fan blade of claim 1, wherein the outboard portion of the anti-rattle rim extends offset toward the leeward side of the blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710618094.2A CN107355425B (en) | 2017-07-26 | 2017-07-26 | High noise cancellation degree axial flow fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710618094.2A CN107355425B (en) | 2017-07-26 | 2017-07-26 | High noise cancellation degree axial flow fan blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107355425A CN107355425A (en) | 2017-11-17 |
| CN107355425B true CN107355425B (en) | 2023-04-25 |
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ID=60285638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710618094.2A Active CN107355425B (en) | 2017-07-26 | 2017-07-26 | High noise cancellation degree axial flow fan blade |
Country Status (1)
| Country | Link |
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| CN (1) | CN107355425B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240749A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Electric Corp | Blower |
| JP2013249787A (en) * | 2012-06-01 | 2013-12-12 | Daikin Industries Ltd | Propeller fan |
| CN103511339B (en) * | 2012-06-29 | 2016-02-03 | 珠海格力电器股份有限公司 | Air-conditioning, axial-flow blower and axial-flow leaf thereof |
| WO2014050146A1 (en) * | 2012-09-28 | 2014-04-03 | ダイキン工業株式会社 | Propeller fan and air conditioner equipped with same |
| CN204175642U (en) * | 2014-09-30 | 2015-02-25 | 美的集团武汉制冷设备有限公司 | Axial-flow windwheel and the air conditioner with it |
| CN207268232U (en) * | 2017-07-26 | 2018-04-24 | 奥克斯空调股份有限公司 | Strong noise elimination degree axial-flow leaf |
-
2017
- 2017-07-26 CN CN201710618094.2A patent/CN107355425B/en active Active
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| Publication number | Publication date |
|---|---|
| CN107355425A (en) | 2017-11-17 |
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