CN112392764A - Axial flow fan blade structure - Google Patents

Axial flow fan blade structure Download PDF

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Publication number
CN112392764A
CN112392764A CN202011190801.0A CN202011190801A CN112392764A CN 112392764 A CN112392764 A CN 112392764A CN 202011190801 A CN202011190801 A CN 202011190801A CN 112392764 A CN112392764 A CN 112392764A
Authority
CN
China
Prior art keywords
pitch circle
front edge
fan blade
end part
edge end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011190801.0A
Other languages
Chinese (zh)
Inventor
林宜致
孙颂伟
周初宪
李培全
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asia Vital Components Co Ltd
Original Assignee
Asia Vital Components Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asia Vital Components Co Ltd filed Critical Asia Vital Components Co Ltd
Priority to CN202011190801.0A priority Critical patent/CN112392764A/en
Publication of CN112392764A publication Critical patent/CN112392764A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F04D29/384—Blades characterised by form
    • F04D29/386—Skewed blades
    • 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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • 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
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/329—Details of the hub
    • 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
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention provides an axial flow fan blade structure, which comprises a hub and a plurality of fan blades, wherein the plurality of fan blades are formed by extending the outer periphery of the hub outwards, each fan blade is provided with a front edge end part, the front edge end part is arranged at the windward end of the plurality of fan blades, the front edge end part is in an arc shape, and by means of the design that the front edge end part is in the arc shape, the wind pressure can be greatly improved, and the noise generated when a fan runs can be reduced.

Description

Axial flow fan blade structure
Technical Field
The present invention relates to the field of heat dissipation fans, and more particularly, to an axial fan blade structure for substantially increasing wind pressure and reducing noise generated during fan operation.
Background
The noise and wind pressure generated by the fan during operation are one of the problems to be improved in the fan field, and it is a technical means to solve the problems in the prior art whether the rotating speed is controlled by a circuit or the fan structure is changed to improve the noise and wind pressure of the fan.
Referring to fig. 1, a structure of fan blades 10 of a conventional fan 1 is shown, wherein a tip 11 with a sharp angle is formed at a front end of each fan blade 10 of the conventional fan 1; when the fan 1 is running, because the end 11 of the fan blade 10 of the existing fan 1 is designed to have a structure with a tip (acute) angle, when the air current contacts the end 11, it is easy to stagnate at the position of the tip (acute) angle to generate pressure concentration, and in addition, part of the air current directly breaks away from the fan blade 10 from the end 11, and furthermore, the fan blade 10 cannot effectively guide the air current to flow to the leeward surface for pressurization, so that the existing fan 1 is prone to have the problems of noise and insufficient wind pressure.
Therefore, how to reduce the noise when the fan operates and increase the wind pressure is an objective that designers in this field strive to improve.
Disclosure of Invention
Accordingly, the present invention is directed to an axial flow fan blade structure for greatly increasing wind pressure.
The secondary objective of the present invention is to provide an axial fan blade structure that greatly reduces the noise generated during the operation of the fan.
In order to achieve the purpose, the invention adopts the technical scheme that:
an axial fan blade structure, comprising:
a hub;
the fan blades are formed by extending the outer peripheral side of the hub outwards, each fan blade is provided with a front edge end part, the front edge end part is arranged at the windward end of the fan blades, and the front edge end part is in an arc shape.
The central point of the hub is defined with a central point, the central point extends outwards to the outer edge of the hub to define a first pitch circle, the first pitch circle extends outwards to form a second pitch circle, the second pitch circle is formed by extending the first pitch circle outwards 0.1-0.9 times, the first pitch circle extends outwards 1 time to define a third pitch circle, and the third pitch circle is flush with the outermost edge of the plurality of fan blades.
The front edge end part also comprises a first radian and a second radian, wherein the first radian is formed by the arc extension of the overlapping part of the front edge end part and the second pitch circle to the third pitch circle, and the second radian is formed by the arc extension of the overlapping part of the front edge end part and the first pitch circle to the second pitch circle.
By the design of the structure, the front edge end part of the fan blade is the windward end when the fan runs by virtue of the structural mode that the front edge end part is in the shape of the arc (obtuse angle), when airflow contacts the front edge end part, the arc front edge end part can bring the airflow to the lower part of the fan blade to generate a pressurizing effect, so that the wind pressure is greatly improved, in addition, the surface action area of the windward end can be increased by virtue of the fillet design of the front edge end part, the pressure on the front edge end part is uniformly distributed, the noise generated when the fan runs is reduced, and the wind pressure is further improved.
Drawings
FIG. 1 is a top view of a conventional fan blade structure;
FIG. 2 is a perspective view of an axial fan blade according to the present invention;
FIG. 3 is a top view of the axial fan blade structure of the present invention.
Description of reference numerals: a fan 1; a fan blade 10; an end portion 11; an axial fan blade structure 2; a hub 20; a center point 200; fan blades 21; a leading end 210; a first arc 2100; a second arc 2101; a first pitch circle 3; a second pitch circle 4; a third segment 5; a first distance D1; second distance D2.
Detailed Description
The above objects, together with the structural and functional features thereof, are accomplished by the preferred embodiments according to the accompanying drawings.
Please refer to fig. 2, which is a perspective view of the axial fan structure of the present invention, as shown in the figure, an axial fan structure 2 includes a hub 20 and a plurality of blades 21, the plurality of blades 21 are formed by extending the outer circumferential side of the hub 20, each blade 21 has a leading edge end 210, the leading edge end 210 is disposed at the windward end of the plurality of blades 21, and the leading edge end 210 is in a circular arc shape or an obtuse angle.
Referring to fig. 3, a top view of the axial fan blade structure of the present invention is shown, and more specifically, a center point 200 is defined at the center of the hub 20, the center point 200 extends outward to the outer edge of the hub 20 to define a first pitch circle 3, a second pitch circle 4 is defined at a first distance D1 extending outward from the first pitch circle 3, a third pitch circle 5 is defined at a second distance D2 extending outward from the first pitch circle 3, the third pitch circle 5 is exactly aligned with the outermost edge of the plurality of fan blades 21, the second pitch circle 4 is formed by extending outward from the first pitch circle 3 by 0.1 to 0.9 times, it should be noted that, in the embodiment, the ratio of the first distance D1 to the second distance D2 is not particularly limited, and can be adjusted according to the requirements of the user, which will be described first.
The leading edge 210 further comprises a first arc 2100 and a second arc 2101, the first arc 2100 is formed by the leading edge 210 overlapping the second pitch circle 4 extending arcuately toward the third pitch circle 5, and the second arc 2101 is formed by the leading edge 210 overlapping the first pitch circle 3 extending arcuately toward the second pitch circle 4.
Therefore, by the design of the structure of the present invention, by the structural configuration that the front edge end 210 is in the shape of an arc or an obtuse angle, when the fan operates, the front edge end 210 of the fan blade 21 is the windward end, when the airflow contacts the front edge end 210, the arc front edge end 210 can bring the airflow to the lower side of the fan blade 21 to generate the pressurization effect, so as to greatly increase the wind pressure, and in addition, by the design of the fillet or the obtuse angle of the front edge end 210, the surface acting area of the windward end can be increased, so that the pressure applied to the front edge end 210 is evenly distributed, and the noise generated when the fan operates is reduced.
As described above, the present invention has the following advantages over the prior art:
1. the wind pressure is greatly improved;
2. greatly reduce the noise generated when the fan operates.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (3)

1. An axial fan blade structure, comprising:
a hub;
the fan blades are formed by extending the outer peripheral side of the hub outwards, each fan blade is provided with a front edge end part, the front edge end part is arranged at the windward end of the fan blades, and the front edge end part is in an arc shape.
2. The axial fan blade structure according to claim 1, wherein: the central point of the hub is defined with a central point, the central point extends outwards to the outer edge of the hub to define a first pitch circle, the first pitch circle extends outwards to form a second pitch circle, the second pitch circle is formed by extending the first pitch circle outwards 0.1-0.9 times, the first pitch circle extends outwards 1 time to define a third pitch circle, and the third pitch circle is flush with the outermost edge of the plurality of fan blades.
3. The axial fan blade structure according to claim 2, wherein: the front edge end part also comprises a first radian and a second radian, wherein the first radian is formed by the arc extension of the overlapping part of the front edge end part and the second pitch circle to the third pitch circle, and the second radian is formed by the arc extension of the overlapping part of the front edge end part and the first pitch circle to the second pitch circle.
CN202011190801.0A 2020-10-30 2020-10-30 Axial flow fan blade structure Pending CN112392764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011190801.0A CN112392764A (en) 2020-10-30 2020-10-30 Axial flow fan blade structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011190801.0A CN112392764A (en) 2020-10-30 2020-10-30 Axial flow fan blade structure

Publications (1)

Publication Number Publication Date
CN112392764A true CN112392764A (en) 2021-02-23

Family

ID=74598531

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011190801.0A Pending CN112392764A (en) 2020-10-30 2020-10-30 Axial flow fan blade structure

Country Status (1)

Country Link
CN (1) CN112392764A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1350122A (en) * 2001-09-25 2002-05-22 广东正野电器有限公司 Vane wheel of low-noise scavenger fan
CN1981134A (en) * 2004-07-06 2007-06-13 斯佩尔汽车有限公司 Axial fan
CN101149063A (en) * 2006-09-22 2008-03-26 乐金电子(天津)电器有限公司 Integral air conditioner axial flow fan structure
CN210919558U (en) * 2019-11-14 2020-07-03 苏州驿力机车科技股份有限公司 Fan structure of fan
CN213775816U (en) * 2020-10-30 2021-07-23 奇鋐科技股份有限公司 Axial flow fan blade structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1350122A (en) * 2001-09-25 2002-05-22 广东正野电器有限公司 Vane wheel of low-noise scavenger fan
CN1981134A (en) * 2004-07-06 2007-06-13 斯佩尔汽车有限公司 Axial fan
CN101149063A (en) * 2006-09-22 2008-03-26 乐金电子(天津)电器有限公司 Integral air conditioner axial flow fan structure
CN210919558U (en) * 2019-11-14 2020-07-03 苏州驿力机车科技股份有限公司 Fan structure of fan
CN213775816U (en) * 2020-10-30 2021-07-23 奇鋐科技股份有限公司 Axial flow fan blade structure

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Application publication date: 20210223