CN107131153B - Axial flow fan - Google Patents

Axial flow fan Download PDF

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Publication number
CN107131153B
CN107131153B CN201710566465.7A CN201710566465A CN107131153B CN 107131153 B CN107131153 B CN 107131153B CN 201710566465 A CN201710566465 A CN 201710566465A CN 107131153 B CN107131153 B CN 107131153B
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Prior art keywords
hub
blades
outer ring
characteristic
center
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CN201710566465.7A
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Chinese (zh)
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CN107131153A (en
Inventor
张川
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Chengdu Huachuan Electric Parts Co Ltd
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Chengdu Huachuan Electric Parts Co Ltd
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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
    • F04D29/325—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
    • F04D29/384—Blades characterised by form
    • 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

Abstract

The application relates to an axial flow fan, which comprises a hub, blades and an outer ring, wherein the hub comprises seven blades, the blades are LS wing profiles, the blade roots of the seven blades are uniformly distributed and connected to the outer peripheral surface of the hub, and the blade tops of the seven blades are connected with the inner wall of the outer ring; the fan blade is formed by overlapping five characteristic sections, the five characteristic sections are distributed on five concentric circles from the center of the hub to the outer ring, and the radii of the five concentric circles are as follows in sequence: r1= 84.91mm, r2= 132.31mm, r3= 166.76mm, r4= 195.20mm, r5=220 mm; the center of gravity stacking line of the characteristic section is as follows: y= -7.363x 3 +0.157x 2 -0.00109x-74.062; in addition, parameters such as chord length, thickness, installation angle and the like of the five characteristic sections are provided. This axial fan carries out optimal design to flabellum quantity, shape, compares current fan, under the same condition, can provide bigger amount of wind, and the noise is lower.

Description

Axial flow fan
Technical Field
The present application relates to an axial flow fan.
Background
The axial flow fan is a common ventilation device, the motor drives the fan to blow out the wind direction parallel to the axial direction, and the axial flow fan structure basically comprises a hub in the middle and blades on the periphery of the hub.
Depending on the fan application, the hub may be provided with three or more blades, and the outer periphery of the blades of some fans may be provided with an outer ring, which connects all the blades into a single body.
The existing axial flow fans have basic air outlet functions, but because of different fan blade designs, the air quantity and noise generated under the same conditions are greatly different, and the large air quantity and low noise are pursued targets of the industry.
Disclosure of Invention
The technical problems to be solved by the application are as follows: an axial fan is provided, which optimizes the shape of the fan blade, and has larger air quantity and lower noise.
The technical scheme adopted for solving the technical problems is as follows:
the axial flow fan comprises a hub, blades and an outer ring, wherein the periphery of the hub is cylindrical, the outer ring is annular, the outer diameter of the hub is 169.84mm, the inner diameter of the outer ring is 440mm, the hub is identical to the axis of the outer ring, the hub is positioned on the periphery of the peripheral surface of the outer ring, the axial flow fan comprises seven blades, the blades are LS wing profiles, the blade roots of the seven blades are uniformly distributed and connected on the peripheral surface of the hub, and the blade tops of the seven blades are connected with the inner wall of the outer ring;
the fan blade is formed by overlapping five characteristic sections, the five characteristic sections are distributed on five concentric circles from the center of the hub to the outer ring, and the radii of the five concentric circles from inside to outside are as follows:
r1＝84.91mm、r2＝132.31mm、r3＝166.76mm、r4＝195.20mm、r5＝220mm；
the shape of the gravity center stacking line of the five characteristic sections is as follows:
y＝-7.363x 3 +0.157x 2 -0.00109x-74.062；
wherein, the characteristic section center of gravity x= 2.9637 closest to the hub center in the five characteristic sections, and the characteristic section center of gravity x= 75.2444 farthest from the hub center in the five characteristic sections; the plane of the gravity center stacking line is vertical to the peripheral surface of the hub;
the chord lengths of the five characteristic sections from inside to outside are as follows:
b1＝62.6mm、b2＝70.4mm、b3＝76mm、b4＝84.7mm、b5＝86.6mm；
the thicknesses of the five characteristic sections from inside to outside are as follows:
c1＝4.132mm、c2＝3.935mm、c3＝3.732mm、c4＝3.532mm、c5＝3.325mm；
the installation angles of the five characteristic sections from inside to outside are as follows:
t1＝23.74°、t2＝22.61°、t3＝21.61°、t4＝20.70°、t5＝20.33°。
further, the hub is a cylindrical shell with one end open; the thickness of the outer ring is 1.5-1.9 mm.
The beneficial effects of the application are as follows: this axial fan carries out optimal design to flabellum quantity, shape, compares current fan, under the same condition, can provide bigger amount of wind, and the noise is lower.
Drawings
FIG. 1 is a schematic top view of an axial fan of the present application;
FIG. 2 is a schematic view of a characteristic cross-sectional profile of an axial fan of the present application;
fig. 3 to 7 are schematic views of characteristic cross sections of the axial flow fan of the present application, and the characteristic cross sections of fig. 3 to 7 correspond to the characteristic cross sections of r1 to r5 in fig. 2 in sequence;
the reference numerals in the drawings are: hub 1, flabellum 2, outer lane 3, characteristic cross-section 4, focus pile up line 5.
Detailed Description
The application is further illustrated by the following examples in conjunction with the accompanying drawings:
the axial flow fan comprises a hub 1, blades 2 and an outer ring 3, wherein the periphery of the hub 1 is cylindrical, the outer ring 3 is annular, the outer diameter of the hub 1 is 169.84mm, the inner diameter of the outer ring 3 is 440mm, the axis of the hub 1 is the same as that of the outer ring 3, the hub 1 is positioned on the periphery of the peripheral surface of the outer ring 3, the axial flow fan comprises seven blades 2, the blades 2 are LS wing profiles, blade roots of the seven blades 2 are uniformly distributed and connected on the periphery of the hub 1, and blade tops of the seven blades 2 are connected with the inner wall of the outer ring 3;
the fan blade 2 is formed by overlapping five characteristic sections 4, the five characteristic sections 4 are distributed on five concentric circles from the center of the fan blade 1 to the outer ring 3, and the radii of the five concentric circles from inside to outside are as follows:
r1＝84.91mm、r2＝132.31mm、r3＝166.76mm、r4＝195.20mm、r5＝220mm；
the shape of the center of gravity stacking line 5 of the five characteristic sections 4 is as follows:
y＝-7.363x 3 +0.157x 2 -0.00109x-74.062；
wherein, the characteristic section center of gravity x= 2.9637 closest to the center of the hub 1 in the five characteristic sections 4, and the characteristic section center of gravity x= 75.2444 farthest from the center of the hub 1 in the five characteristic sections 4; the plane of the gravity center stacking line 5 is vertical to the peripheral surface of the hub 1;
the chord lengths of the five characteristic sections 4 from inside to outside are as follows:
b1＝62.6mm、b2＝70.4mm、b3＝76mm、b4＝84.7mm、b5＝86.6mm；
the thicknesses of the five characteristic sections 4 from inside to outside are as follows:
c1＝4.132mm、c2＝3.935mm、c3＝3.732mm、c4＝3.532mm、c5＝3.325mm；
the installation angles of the five characteristic sections 4 from inside to outside are as follows:
t1＝23.74°、t2＝22.61°、t3＝21.61°、t4＝20.70°、t5＝20.33°。
as shown in fig. 1: the hub 1 of the axial flow fan is provided with seven fan blades 2, the seven fan blades 2 are uniformly distributed on the periphery of the peripheral surface of the hub 1, and all the fan blades 2 are rotationally symmetrical with the axis of the hub 1.
The fan blade is in the shape of an LS airfoil, namely the LS airfoil which is published in 8 months of 2011 by the ventilator practical technical handbook 2 nd edition-commercial cloisonne-mechanical industry Press.
The shape, the number and the size of the fan are optimized, the outer diameter of the hub 1 is 169.84mm, and the inner diameter of the outer ring 3 is 440mm.
The fan blade 2 is formed by overlapping five characteristic sections 4, as shown in fig. 3 to 7, which are schematic shapes of the five characteristic sections, and the five characteristic sections in fig. 3 to 7 sequentially correspond to the characteristic sections 4 on five concentric circles r1 to r5 shown in fig. 2.
For example, the characteristic section shown in fig. 3 corresponds to the cylindrical surface on which the concentric circle r1 in fig. 2 is located;
the characteristic section shown in fig. 4 corresponds to the cylindrical surface on which the concentric circles r2 in fig. 2 are located;
the characteristic section shown in fig. 5 corresponds to the cylindrical surface on which the concentric circles r3 in fig. 2 lie, and so on.
The five concentric circle radii from inside to outside shown in fig. 2 are in order:
r1= 84.91mm, r2= 132.31mm, r3= 166.76mm, r4= 195.20mm, r5=220 mm; five characteristic sections 4 are defined at radial positions at the periphery of the hub 1.
The shape of the center of gravity stacking line 5 of the five characteristic sections 4 is as follows: function y= -7.363x 3 +0.157x 2 -0.00109x-74.062。
In the above function, the center of gravity of the characteristic section closest to the center of the hub 1 in the five characteristic sections 4 is x= 2.9637, the center of gravity of the section farthest from the center of the hub 1 in the five characteristic sections 4 is x= 75.2444, and the center of gravity stacking line 5 defining the five characteristic sections is located in the area of the function, so that the circumferential positions of the five characteristic sections 4 at the periphery of the hub 1 are defined.
The chord length, thickness and installation angle of the characteristic section corresponding to r1 in fig. 2 correspond to b1, c1 and t1 in fig. 3 respectively;
the chord length, thickness and installation angle of the characteristic section corresponding to r2 in fig. 2 correspond to b2, c2 and t2 in fig. 4 respectively;
the chord length, thickness and installation angle of the characteristic section corresponding to r3 in fig. 2 correspond to b3, c3 and t3 in fig. 5 respectively;
and so on.
As shown in fig. 2, the chord lengths of the five characteristic sections 4 from inside to outside are in order:
b1＝62.6mm、b2＝70.4mm、b3＝76mm、b4＝84.7mm、b5＝86.6mm；
the thicknesses of the five characteristic sections 4 from inside to outside are as follows:
c1＝4.132mm、c2＝3.935mm、c3＝3.732mm、c4＝3.532mm、c5＝3.325mm；
the installation angles of the five characteristic sections 4 from inside to outside are as follows:
t1＝23.74°、t2＝22.61°、t3＝21.61°、t4＝20.70°、t5＝20.33°。
the characteristic section installation angle is the included angle between the straight line where the chord length is located and the plane where the gravity center stacking line 5 is located.
The beneficial effects of the present technical solution are demonstrated below in specific test data.
Table 1, the air volume comparison data of the axial flow fan of the present application and a conventional fan is as follows:
table 2, the noise comparison data of the axial fan of the present application with a certain fan is as follows:
noise dB at 2050rpm
The fan of the application 70.3
Existing fan 73.4
The meaning of the data in the second row of table 1 is: the fan of the application is adopted, the rotating speed is regulated to 1968rpm, the static pressure is regulated to 120Pa, and the obtained air quantity is 3543.8m 3 And/h, the other data are as follows.
It can be seen that the fan of the application has a larger air volume than the existing fan under the condition of equal rotating speed and static pressure.
The data in table 2 means: under the condition of the same rotating speed of 2050rpm, the noise of the fan is 70.3dB, and the noise of a certain existing fan is 73.4dB. Indicating that the fan of the application has lower noise than the existing fan at the same rotating speed.
In addition, the fan design has the advantages of high cooling efficiency and good heat dissipation effect.

Claims (1)

1. The axial flow fan comprises a hub (1), blades (2) and an outer ring (3), wherein the periphery of the hub (1) is cylindrical, the outer ring (3) is annular, the outer diameter of the hub (1) is 169.84mm, the inner diameter of the outer ring (3) is 440mm, the hub (1) is identical to the axis of the outer ring (3), the outer ring (3) is positioned on the periphery of the peripheral surface of the hub (1), the axial flow fan comprises seven blades (2), the blades (2) are LS airfoil profiles, blade roots of the seven blades (2) are uniformly distributed and connected on the peripheral surface of the hub (1), and blade tops of the seven blades (2) are connected with the inner wall of the outer ring (3);
the fan blade (2) is formed by stacking five characteristic sections (4), the five characteristic sections (4) are distributed on five concentric circles from the center of the hub (1) to the outer ring (3), and the radii of the five concentric circles from inside to outside are as follows:
r1＝84.91mm、r2＝132.31mm、r3＝166.76mm、r4＝195.20mm、r5＝220mm；
the shape of a gravity center stacking line (5) of the five characteristic sections (4) is as follows:
y＝-7.363x 3 +0.157x 2 -0.00109x-74.062；
wherein, the characteristic section center of gravity x= 2.9637 of the five characteristic sections (4) closest to the center of the hub (1), and the characteristic section center of gravity x= 75.2444 of the five characteristic sections (4) farthest from the center of the hub (1); the plane of the gravity center stacking line (5) is vertical to the peripheral surface of the hub (1);
the chord lengths of the five characteristic sections (4) from inside to outside are as follows:
b1＝62.6mm、b2＝70.4mm、b3＝76mm、b4＝84.7mm、b5＝86.6mm；
the thicknesses of the five characteristic sections (4) from inside to outside are as follows:
c1＝4.132mm、c2＝3.935mm、c3＝3.732mm、c4＝3.532mm、c5＝3.325mm；
the installation angles of the five characteristic sections (4) from inside to outside are as follows:
t1＝23.74°、t2＝22.61°、t3＝21.61°、t4＝20.70°、t5＝20.33°；
the hub (1) is a cylindrical shell with one end open; the thickness of the outer ring (3) is 1.5-1.9 mm.
CN201710566465.7A 2017-07-12 2017-07-12 Axial flow fan Active CN107131153B (en)

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CN107131153B true CN107131153B (en) 2023-11-07

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108757568B (en) * 2018-05-29 2020-10-23 青岛科技大学 Axial flow fan blade
CN108825553A (en) * 2018-07-18 2018-11-16 成都华川电装有限责任公司 The blade structure of aerofoil fan
CN109505788B (en) * 2018-12-25 2021-01-29 哈尔滨工业大学 Reversible axial flow fan
CN111677693B (en) * 2020-05-21 2021-10-08 同济大学 High-pressure cooling fan for large-flow low-noise fuel cell automobile
CN115342068B (en) * 2022-08-04 2023-06-27 中国农业大学 Method for improving performance of agricultural ventilator

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1512294A (en) * 1974-12-16 1978-06-01 Friedling G Ventilator
FR2647511A1 (en) * 1989-05-25 1990-11-30 Velecta Ventilation Elect Appl Centrifugal fan having a reduced noise level
JP2001082384A (en) * 1999-09-20 2001-03-27 Sanyo Electric Co Ltd Impeller and centrifugal blower with the impeller
CN1294659A (en) * 1998-03-23 2001-05-09 斯帕尔公司 Axial flow fan
EP1111245A2 (en) * 1999-12-23 2001-06-27 BorgWarner Inc. Molded cooling fan
CN2833191Y (en) * 2005-11-24 2006-11-01 邹韬韵 Blade with wing-shaped structure
JP2008310576A (en) * 2007-06-14 2008-12-25 Hitachi Appliances Inc Design support method and design support system
CN101776001A (en) * 2008-12-04 2010-07-14 通用电气公司 Optimized turbocharger bearing system
CN103115021A (en) * 2013-02-01 2013-05-22 华中科技大学 Vane wheel device
CN105041684A (en) * 2015-08-07 2015-11-11 黄社兰 Engineering axial flow cooling plastic fan
CN207161381U (en) * 2017-07-12 2018-03-30 成都华川电装有限责任公司 Aerofoil fan

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1512294A (en) * 1974-12-16 1978-06-01 Friedling G Ventilator
FR2647511A1 (en) * 1989-05-25 1990-11-30 Velecta Ventilation Elect Appl Centrifugal fan having a reduced noise level
CN1294659A (en) * 1998-03-23 2001-05-09 斯帕尔公司 Axial flow fan
JP2001082384A (en) * 1999-09-20 2001-03-27 Sanyo Electric Co Ltd Impeller and centrifugal blower with the impeller
EP1111245A2 (en) * 1999-12-23 2001-06-27 BorgWarner Inc. Molded cooling fan
CN2833191Y (en) * 2005-11-24 2006-11-01 邹韬韵 Blade with wing-shaped structure
JP2008310576A (en) * 2007-06-14 2008-12-25 Hitachi Appliances Inc Design support method and design support system
CN101776001A (en) * 2008-12-04 2010-07-14 通用电气公司 Optimized turbocharger bearing system
CN103115021A (en) * 2013-02-01 2013-05-22 华中科技大学 Vane wheel device
CN105041684A (en) * 2015-08-07 2015-11-11 黄社兰 Engineering axial flow cooling plastic fan
CN207161381U (en) * 2017-07-12 2018-03-30 成都华川电装有限责任公司 Aerofoil fan

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