CN210509726U - Unequal angle blade of radiating fan - Google Patents
Unequal angle blade of radiating fan Download PDFInfo
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- CN210509726U CN210509726U CN201921086325.0U CN201921086325U CN210509726U CN 210509726 U CN210509726 U CN 210509726U CN 201921086325 U CN201921086325 U CN 201921086325U CN 210509726 U CN210509726 U CN 210509726U
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Abstract
The utility model relates to a radiator fan's not isogonal blade is designed to the not good enough technical problem of heat radiation structure design and radiating effect among the solution current like product, this not isogonal blade includes first blade and second blade, first blade and second blade are spiral slant array distribution in wheel hub's external diameter global, be equipped with the clearance between first blade and the second blade, its main points are that the difference angle between β/A between the adjacent first blade of wheel hub external diameter and the second blade and β/B is less than 5 degrees, the first blade of wheel hub external diameter and the sum of second blade quantity are the even number, the blade wing section of first blade and second blade is the same, namely the shape of first blade and second blade is the same, the best embodiment of above-mentioned installation angle is 18 degrees and 15 degrees, the blade number is six, it is fit for the flabellum use as axial fan.
Description
Technical Field
The utility model relates to an axial fan's flabellum is a radiator fan's not isogonal blade.
Background
The axial flow fan is a fan in which blades push air to flow in the same direction as a shaft when the fan works, and is divided into a large-sized axial flow fan, a medium-sized axial flow fan and a small-sized axial flow fan according to the size of the fan, wherein the small-sized axial flow fan is mainly suitable for ventilation and heat dissipation of mechanical equipment, such as an electrical cabinet and the like. With the increasing requirements of users on products, noise generated by electronic products also becomes an important index for user experience, and fluid noise derived while the cooling fan cools the electronic products is one of the main noise sources of the electronic products. The conventional axial flow fan can be used for further reducing the noise problem, such as the application number 201520944895.4 disclosed in the Chinese patent document, the granted publication date 2016.05.25, and the utility model name 'an unequal-distance multi-blade axial flow fan blade and an electric fan'; further, as disclosed in chinese patent document No. 201320395329.3, publication No. 2014.01.08, the name of the utility model "small axial flow fan with non-uniformly distributed blades". However, the blade display mode and angle design of the above products and similar products need to be further improved, so that the highest noise value at the fundamental frequency can be further avoided.
Disclosure of Invention
In order to overcome the defects, the utility model aims to provide a radiating fan's unequal angle blade to the field, make it solve the problem that the blade display angle mode of the existing like products is not good enough, resulting in the great technical problem of working noise. The purpose is realized by the following technical scheme.
The unequal angle blades of the heat dissipation fan comprise a first blade and a second blade, wherein the first blade and the second blade are spirally and obliquely distributed on the peripheral surface of the outer diameter of a hub in an array mode, a gap is arranged between the first blade and the second blade, and the structural design key points are that the difference angle between β/A and β/B between the first blade and the second blade which are adjacent to the outer diameter of the hub is less than 5 degrees, the sum of the number of the first blade and the second blade of the outer diameter of the hub is even, so that after the unequal angle blades are introduced into the hub, the fluid outlet angles of the adjacent blades are inconsistent, the number of the blades is 2N, two fluid impacts with the same frequency for N times can occur at the air outlet of the fan in a rotation period, energy cannot be superposed and dispersed, the highest noise value at the (2N + 1) position is avoided, the wind sound of the fan is purer, and the noise is reduced.
The blade airfoil of the first blade is the same as that of the second blade, namely the first blade and the second blade are the same in shape.
The utility model has reasonable structural design, convenient production and preparation, small working noise, same release of fluid frequency between the blades and difficult superposition; the fan blade is suitable for being used as a non-equiangular blade of a cooling fan and is further improved by similar products.
Drawings
Fig. 1 is a schematic sectional structure diagram of the present invention.
Fig. 2 is a schematic perspective view of fig. 1.
Figure number and name: 1. first blade, 2, second blade, 3, hub.
Detailed Description
Referring now to the drawings, the structure and operation of the present invention will be further described, as shown in fig. 1 and 2, the unequal angle blades include a first blade 1 and a second blade 2, the first blade and the second blade are spirally and obliquely distributed on the periphery of the outer diameter of the hub 3, and a gap is provided between the first blade and the second blade, wherein the difference angle between the installation angles β/a and β/B between the first blade 1 and the second blade 2 adjacent to the outer diameter of the hub is less than 5 degrees, i.e. the installation angle β/a of the first blade 1 is 18 degrees, the installation angle β/B of the second blade 2 is 15 degrees, the difference angle between the two is 3 degrees, and the sum of the number of the first blade and the second blade of the outer diameter of the hub is six blades.
In summary, the unequal angle blades are applied to the same airfoil, but in the different mounting angles β/A and β/B of the blades, the mounting angle β/A of the first blade is within 5 degrees of the mounting angle β/B of the second blade, and assuming that the number of blades is 2N, the first blade is spaced from the second blade by 180 DEG/N, the axial array N of the first blade, the axial array N of the second blade, and the array of the first blade and the array of the second blade form a fan blade.
Claims (2)
1. The unequal-angle blade of the cooling fan comprises a first blade (1) and a second blade (2), wherein the first blade and the second blade are spirally and obliquely distributed on the peripheral surface of the outer diameter of a hub (3) in an array mode, a gap is formed between the first blade and the second blade, the unequal-angle blade is characterized in that the difference angle between installation angles β/A and β/B between the first blade (1) and the second blade (2) adjacent to the outer diameter of the hub (3) is smaller than 5 degrees, and the sum of the number of the first blade and the second blade of the outer diameter of the hub is even.
2. The unequal-angle blade of a heat-dissipating fan according to claim 1, wherein the blade profiles of the first blade (1) and the second blade (2) are the same, i.e., the shapes of the first blade and the second blade are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921086325.0U CN210509726U (en) | 2019-07-11 | 2019-07-11 | Unequal angle blade of radiating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921086325.0U CN210509726U (en) | 2019-07-11 | 2019-07-11 | Unequal angle blade of radiating fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210509726U true CN210509726U (en) | 2020-05-12 |
Family
ID=70582542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921086325.0U Active CN210509726U (en) | 2019-07-11 | 2019-07-11 | Unequal angle blade of radiating fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210509726U (en) |
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2019
- 2019-07-11 CN CN201921086325.0U patent/CN210509726U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210713 Address after: 315423 No.1, Shengjiu Ring Road, industrial park, Dayin Town, Yuyao City, Ningbo City, Zhejiang Province Patentee after: Ningbo Shengjiu Technology Co.,Ltd. Address before: 315423 No.1, Shengjiu Road, industrial park, Dayin Town, Yuyao City, Ningbo City, Zhejiang Province Patentee before: NINGBO SHENGJIU HEAT DISSIPATION TECHNOLOGY Co.,Ltd. |