CN115342068A - Method for improving performance of agricultural ventilator - Google Patents

Method for improving performance of agricultural ventilator Download PDF

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Publication number
CN115342068A
CN115342068A CN202210930567.3A CN202210930567A CN115342068A CN 115342068 A CN115342068 A CN 115342068A CN 202210930567 A CN202210930567 A CN 202210930567A CN 115342068 A CN115342068 A CN 115342068A
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Prior art keywords
guide vane
agricultural
ventilator
front guide
prototype
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CN115342068B (en
Inventor
丁涛
李妥
刘志伟
王朝元
施正香
李保明
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China Agricultural University
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China Agricultural University
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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
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B76/00—Parts, details or accessories of agricultural machines or implements, not provided for in groups A01B51/00 - A01B75/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F04D29/542—Bladed diffusers
    • F04D29/544—Blade shapes

Abstract

The invention belongs to the field of mechanical application equipment, and particularly relates to a method for improving the performance of an agricultural ventilator. The method comprises the following steps: s1, carrying out performance test on the prototype agricultural ventilator to obtain ventilation volume, inlet static pressure and power parameters of the prototype agricultural ventilator; s2, reversely modeling the blade 4 of the prototype agricultural ventilator to obtain the radial position, chord length and air inlet geometric angle corresponding to the blade 4 of the prototype agricultural ventilator relative to the blade height; s3, selecting an airfoil profile matched with the blade 4 of the prototype agricultural ventilator as an airfoil profile of the front guide vane 6; s4, solving a function model of the front guide vane installation combination by taking the ventilation quantity as an optimization target; s5, manufacturing the front guide vane 6 according to the wing section of the front guide vane 6 obtained in the step S3; and then, installing the front guide vane 6 on the prototype agricultural ventilator according to the function model of the front guide vane installation combination obtained in the step S4.

Description

Method for improving performance of agricultural ventilator
Technical Field
The invention belongs to the field of mechanical application equipment, and particularly relates to a method for improving the performance of an agricultural ventilator.
Background
With the development of economic society, china has changed from a rapid development stage of pursuing economy to a high-quality development stage, and the social-economic transformation puts forward new requirements on the production scale and the production quality of various industries and puts forward higher requirements on the supply of fluid machinery. As a typical fluid machine, its wide application also puts higher demands on the axial flow fan, wherein the most urgent is to solve the problems of high energy consumption and low utilization rate of the axial flow fan. Therefore, the bottleneck for limiting the rapid development of the axial flow fan industry is formed by improving the efficiency of the axial flow fan and reducing the energy consumption of the axial flow fan.
Along with the high-quality development of the modern aquaculture industry of China, higher requirements are put forward on low energy consumption and large ventilation volume of the agricultural axial flow fan. The agricultural axial flow fan for performance detection in the ventilation equipment performance detection laboratory of the university of agriculture in China has ventilation energy efficiency distributed in the range of 20% -40%, and compared with high-efficiency fans in the world, the agricultural axial flow fan is generally low in efficiency and high in power consumption ratio, so that the improvement of the energy conversion efficiency of the agricultural axial flow fan is the key point for energy conservation and emission reduction. The front guide vane is additionally arranged to change the air flow inlet angle to optimize the agricultural axial flow fan, so that the improvement of the ventilation rate and the reduction of the energy consumption are feasible and have important significance on energy conservation and environmental protection. At present, the front guide vane is not applied to the field of agricultural axial flow fans, no existing achievement can be used by persons with ordinary skill in the art, and the invention is provided based on the background.
Disclosure of Invention
In view of the above technical problems, it is an object of the present invention to provide a method for improving the performance of an agricultural ventilator by selecting a wing profile adapted to a blade of a prototype agricultural ventilatorThe method is characterized in that the mounting angle alpha of the front guide vane is obtained through a ventilation quantity, mounting structure parameters of the front guide vane of the ventilator and a function model as the wing section of the front guide vane 1 The optimal values of the moving and static installation distance L of the guide vanes and the number n of the guide vanes are obtained, so that the ventilation quantity and the ventilation energy efficiency ratio of the agricultural ventilator are obviously improved, the internal flow state of the agricultural ventilator is improved, and the working capacity of the agricultural ventilator is improved.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for improving the performance of an agricultural ventilator, the agricultural ventilator comprises a motor 1, a rotating shaft 2, a hub 3, blades 4 and a current collector 5; wherein, the inlet and the outlet of the current collector 5 are circular rings with equal diameters, and the motor 1 is fixed on the wall surface of the current collector 5 through a motor bracket; a rotating shaft 2 of the motor 1 extends to the front end of a hub 3 towards the front end; the root of the blade 4 is placed in a groove reserved in the hub 3 and fixed on the hub 3;
wherein the method comprises the following steps:
s1, carrying out performance test on the prototype agricultural ventilator to obtain ventilation volume, inlet static pressure and power parameters of the prototype agricultural ventilator;
s2, reversely modeling the blade 4 of the prototype agricultural ventilator to obtain the radial position, chord length and air inlet geometric angle corresponding to the blade 4 of the prototype agricultural ventilator at the position corresponding to the blade height;
s3, selecting an airfoil profile matched with a blade 4 of the prototype agricultural ventilator as an airfoil profile of a front guide vane 6; wherein, the first and the second end of the pipe are connected with each other,
selecting the chord length corresponding to the position of the blade 4 with 0.5 relative to the height of the blade as the chord length of the front guide blade 6, and selecting the relative thickness of the airfoil profile with the lift coefficient of 0.9-1.1
Figure BDA0003781194680000021
The wing profile of 0.05-0.1 is used as the wing profile of the front guide vane 6;
s4, solving a function model of the front guide vane installation combination by taking the ventilation quantity as an optimization target:
ventilation and guide vane mounting angle alpha 1 Function model of guide vane dynamic and static installation distance L and guide vane number nThe model, namely the function model of the front guide vane installation combination is as follows:
Figure BDA0003781194680000032
wherein x is 1 Is a leading guide vane installation angle alpha 1 In degrees; x is the number of 2 The guide vane dynamic and static installation distance L is set as mm; x is the number of 3 The number of the guide vanes is n;
s5, manufacturing the front guide vane 6 according to the wing section of the front guide vane 6 obtained in the step S3; and then, the front guide vane 6 is installed on the prototype agricultural ventilator according to the function model of the front guide vane installation combination obtained in the step S4.
In step S3, the chord length of the front guide vane 6 is 103mm, the lift coefficient of the airfoil of the front guide vane 6 is 0.96, and the relative thickness of the airfoil of the front guide vane 6
Figure BDA0003781194680000031
Was 0.09.
The hub 3 is divided into a front part and a rear part, and is buckled on the rotating shaft 2 through a nut ring.
Compared with the prior art, the invention has the beneficial effects that:
1) According to the method for improving the performance of the agricultural ventilator, the wing section matched with the blade of the prototype agricultural ventilator is selected as the wing section of the front guide vane, and the ventilation volume and the energy efficiency ratio of the fan are remarkably improved through a function model of the ventilation volume and the mounting structure parameters of the front guide vane.
2) The method for improving the performance of the agricultural ventilator can improve the ventilation energy efficiency ratio of the agricultural ventilator by 5.7-10.39% and improve the ventilation quantity by 6.62-10.89%.
3) The method for improving the performance of the agricultural ventilator can effectively enhance the acting capacity of the fan blade.
Drawings
FIG. 1a is a left side view of a farm ventilator;
FIG. 1b is a front view of the agricultural ventilator;
FIG. 1c is a rear view of the agricultural ventilator;
FIG. 2a is a first schematic view of a selected leading vane airfoil of the leading vane of the present invention;
FIG. 2b is a second schematic view of a selected leading vane airfoil of the leading vane of the present invention;
FIG. 3a is a front isometric view of an embodiment of the agricultural ventilator of the present invention mounted with a front vane;
FIG. 3b is a rear view structural view of a front vane mounting embodiment of the agricultural ventilator of the present invention;
FIG. 4a is a leading vane setting angle α of the present invention 1 A first schematic diagram of a guide vane dynamic and static installation distance L parameter;
FIG. 4b is a second schematic view of parameters of a leading guide vane installation angle α 1 and a guide vane dynamic and static installation distance L according to the present invention;
FIG. 5a is a graph of the present invention versus the air flow of a prototype agricultural ventilator;
FIG. 5b is a graph of the energy efficiency ratio of the present invention versus a prototype agricultural ventilator;
fig. 6a is a plot of pressure line at span =0.15 (low span);
fig. 6b is a plot of pressure lines at span =0.50 (mid-span);
fig. 6c is a pressure line plot for span =0.85 (high span).
Wherein the reference numerals are:
1 motor 2 rotating shaft
3 hub 4 blade
5 leading stator of wind collector 6
7 rotation axis direction 8 guide vane trailing edge
9 hub leading edge
α 1 Guide vane mounting angle L guide vane dynamic and static mounting distance
Detailed Description
In order to make the technical features of the present invention clearer, the present invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1a, 1b and 1c, an agricultural ventilator comprises a motor 1, a rotating shaft 2, a hub 3, blades 4 and a collector 5. Wherein the content of the first and second substances,
the inlet and the outlet of the current collector 5 are circular rings with equal diameters, and the motor 1 is fixed on the wall surface of the current collector 5 through a motor bracket. The rotating shaft 2 of the motor 1 extends forward to the front end of the hub 3. The hub 3 is divided into a front part and a rear part and is buckled on the rotating shaft 2 through a nut ring. The root of the blade 4 is placed in a groove reserved in the hub 3 and fixed on the hub 3.
A method for improving the performance of an agricultural ventilator comprises the following steps:
s1, performing performance test on a prototype agricultural ventilator to obtain performance parameters;
and (4) carrying out performance test on the prototype agricultural ventilator to obtain ventilation quantity, inlet static pressure and power parameters of the prototype agricultural ventilator.
S2, reversely modeling the blade 4 of the prototype agricultural ventilator to obtain the radial position, chord length and air inlet geometric angle corresponding to the blade 4 of the prototype agricultural ventilator at the position corresponding to the blade height;
and (3) carrying out reverse modeling on the blade 4 of the prototype agricultural ventilator in 3D modeling software to obtain the radial position, chord length and air inlet geometric angle corresponding to the blade 4 of the prototype agricultural ventilator relative to the blade height.
S3, selecting an airfoil profile matched with the blade 4 of the prototype agricultural ventilator as an airfoil profile of the front guide vane 6;
optimum lift coefficient Cyopt, lift-drag ratio 1/mu (1/mu = Cy/Cx), and relative thickness of airfoil
Figure BDA0003781194680000051
Stall performance and airfoil shape, etc. Selecting the lift coefficient of 0.9-1.1 and the relative thickness of wing profile
Figure BDA0003781194680000052
The airfoil shape of 0.05-0.1 is used as the airfoil shape of the front guide vane 6.
S4, solving a function model of the front guide vane installation combination by taking the ventilation quantity as an optimization target:
as the function model belongs to a curved surface equation, design-Expert software is adopted for assisting in solving.
Mounting angle alpha of guide vane 1 The dynamic and static installation distance L of the guide vanes and the number n of the guide vanes are subjected to single factor analysis respectively, the external characteristic takes the ventilation volume and the energy efficiency ratio of the fan as evaluation indexes, the internal characteristic takes the internal flow field characteristic of the fan as the evaluation indexes, and a more optimal value interval of each factor is obtained.
Wherein the guide vane mounting angle alpha 1 The fan performance is better in the inlet geometric angle range corresponding to the blade height of 0.3-0.7 times; the performance of the fan with the same number of guide vanes and blades is better; the guide vane dynamic and static installation distance L is 0.85b h ～1.2b h (b h Chord length at the root of the blade) is better.
According to the Box-Behnken test combination design principle, the installation angle alpha of the guide vane is used 1 The dynamic and static installation distance L of the guide vanes and the number n of the guide vanes are test factors, the ventilation quantity is used as a response value to carry out response surface simulation test research, and the ventilation quantity and the installation angle alpha of the guide vanes are obtained 1 The function model of the guide vane dynamic and static installation distance L and the guide vane number n, namely the function model of the front guide vane installation combination is as follows:
Figure BDA0003781194680000061
wherein x is 1 Is a leading guide vane installation angle alpha 1 In degrees; x is a radical of a fluorine atom 2 Setting the guide vane dynamic and static installation distance L in mm; x is the number of 3 The number of guide vanes is n.
S5, manufacturing the front guide vane 6 according to the wing section of the front guide vane 6 obtained in the step S3; and then, installing the front guide vane 6 on the prototype agricultural ventilator according to the function model of the front guide vane installation combination obtained in the step S4.
Manufacturing the front guide vane 6 by 3D printing according to the airfoil of the front guide vane 6 obtained in the step S3, and obtaining the guide vane installation angle alpha obtained in the step S4 1 The guide vane dynamic and static installation distance L and the guide vane number n are used for installing the front guide vane 6 on the corresponding position of the motor 1 of the prototype agricultural ventilator, the grooves are in one-to-one correspondence, and the liquid glue is used forAnd (5) fixing. Wherein the leading guide vane installation angle alpha 1 The included angle between the chord line at the root part of the guide vane and the direction of the rotating shaft is formed; the dynamic and static installation distance L of the guide vane is the distance between the tail part of the guide vane and the front edge of the hub.
Examples
S1, carrying out performance test on the prototype agricultural ventilator to obtain performance parameters
A 550 agricultural ventilator (the 550 agricultural ventilator is hereinafter referred to as a prototype agricultural ventilator) is structured as shown in fig. 1a, 1b, and 1 c. The rotating speed of the agricultural ventilator is 1440r/min, the diameters of an inlet and an outlet of the ventilator are both 550mm, the radial length of a blade is 221mm, the diameter of a hub of the ventilator is 98mm, the diameter of a motor is 125mm, the length of the motor is 148mm, and the axial distance of the inlet and the outlet is 380mm.
Under the working condition (49.02 Pa) of the prototype agricultural ventilator, the ventilation rate is 6343m3/h, and the energy efficiency ratio is 14.2m 3 /(h·W)。
S2, carrying out reverse modeling on the prototype agricultural ventilator blade, and further analyzing to obtain relevant parameters of the blade
And (3) carrying out reverse modeling on the prototype agricultural ventilator blade in 3D modeling software, and further analyzing to obtain the radial position, chord length and air inlet geometric angle corresponding to the blade relative to the blade height:
Figure BDA0003781194680000071
s3, selecting an airfoil as an airfoil of a front guide vane
According to the characteristics of the blades of the prototype agricultural ventilator, the characteristics are selected to be matched with the blades, NACA 0015 is selected to be used as the wing profile of the front guide blade 6, the chord length of the front guide blade 6 is 103mm, the lift coefficient of the wing profile of the front guide blade 6 is 0.96, and the relative thickness of the wing profile of the front guide blade 6
Figure BDA0003781194680000072
Was 0.09. As shown in fig. 2a and 2 b.
S4, solving a function model of the front guide vane installation combination by taking the ventilation quantity as an optimization target
Figure BDA0003781194680000081
Wherein x is 1 Is a leading guide vane installation angle alpha 1 In degrees; x is the number of 2 Setting the guide vane dynamic and static installation distance L in mm; x is a radical of a fluorine atom 3 The number of guide vanes is n.
As shown in fig. 3a, 3b, 4a and 4b, the agricultural ventilator front guide vane parameter of this embodiment is set to a front guide vane installation angle a 1 And the installation distance L =57mm, the number of guide vanes n =4.
S5, manufacturing the front guide vane 6 according to the wing section of the front guide vane 6 obtained in the step S3; and (5) installing the front guide vane 6 on the prototype agricultural ventilator according to the function model of the front guide vane installation combination obtained in the step (S4).
Manufacturing the front guide vane 6 by 3D printing according to the airfoil of the front guide vane 6 obtained in the step S3, and obtaining the guide vane installation angle alpha obtained in the step S4 1 And the mounting distance L =57mm between the movable and the static guide vanes and the number n =4 of the guide vanes, the front guide vanes 6 are mounted at the corresponding positions of the motor 1 of the prototype agricultural ventilator, the grooves correspond one to one and are fixed by liquid glue.
The method for improving the performance of the agricultural ventilator can improve the ventilation quantity and the ventilation energy efficiency ratio of the agricultural ventilator. Compared with a prototype agricultural ventilator, under the working condition (49.02 Pa), the ventilation rate is 6772m 3 The reaction time is increased by 6.76%; the energy efficiency ratio is 15.3m 3 /(h.W), 7.75% improvement.
To illustrate the performance of the present invention under all conditions in detail, the air volume, energy efficiency ratio and pressure line of the blade surface are analyzed.
Fig. 5a is a graph comparing the ventilation rate of the agricultural ventilator of the present invention with that of the prototype agricultural ventilator, and it can be seen that the ventilation rate gradually decreases with the increase of the inlet static pressure, and the present invention is superior to the prototype agricultural ventilator under all conditions.
Fig. 5b is a graph showing the comparison of the energy efficiency ratio of the agricultural ventilator and the prototype, and it can be seen that the energy efficiency ratio gradually decreases with the increase of the static pressure of the inlet, and the agricultural ventilator is superior to the prototype under all working conditions.
Fig. 6a is a pressure line plot at span =0.15 (low span) from which it can be seen that the pressure differential across the surface of the vanes of the prototype agricultural ventilator is less by a maximum pressure differential of approximately 300Pa; it can be obviously seen that the pressure line of the fan processed according to the invention wraps the pressure line of the prototype agricultural ventilator, the pressure difference of the blade is obviously increased, and the working capacity of the blade is enhanced.
Figure 6b is a pressure profile at span =0.50 (mid-span) with an increase in differential pressure across the blade surface for the prototype agricultural ventilator, the maximum differential pressure being approximately 520Pa; the difference value of the pressure lines of the fans treated according to the invention is further increased.
Figure 6c is a pressure line plot at span =0.85 (high span) with the prototype agricultural ventilator blade surface pressure differential continuing to increase to a maximum of about 600Pa; the difference value of the pressure lines of the fans treated according to the invention is further increased.
As can be seen from fig. 6a, 6b and 6c, at low span, the leading edge of the blade has an inverse pressure gradient, because the inlet angle of the blade is a negative angle of attack, the incoming flow first contacts the suction surface of the blade, and the pressure of the suction surface at the leading edge of the blade is significantly higher than that of the pressure surface, resulting in a large loss at the root of the blade. The pressure difference of the suction surface of the pressure surface of the middle and upper parts of the blade is large, and the blade is a main working area.

Claims (3)

1. A method for improving the performance of an agricultural ventilator, the agricultural ventilator comprises a motor (1), a rotating shaft (2), a hub (3), blades (4) and a current collector (5); wherein, the inlet and the outlet of the current collector (5) are equal-diameter circular rings, and the motor (1) is fixed on the wall surface of the current collector (5) through a motor bracket; a rotating shaft (2) of the motor (1) extends to the front end of the hub (3) towards the front end; the root part of the blade (4) is placed in a groove reserved in the hub (3) and fixed on the hub (3);
the method is characterized in that: the method comprises the following steps:
s1, carrying out performance test on the prototype agricultural ventilator to obtain ventilation volume, inlet static pressure and power parameters of the prototype agricultural ventilator;
s2, carrying out reverse modeling on the blade (4) of the prototype agricultural ventilator to obtain the radial position, chord length and air inlet geometric angle corresponding to the blade (4) of the prototype agricultural ventilator relative to the blade height;
s3, selecting an airfoil profile matched with a blade (4) of the prototype agricultural ventilator as an airfoil profile of a front guide vane (6); wherein the content of the first and second substances,
selecting the chord length corresponding to the position of the blade (4) with the height of 0.5 as the chord length of the front guide blade (6), and selecting the lift coefficient of 0.9-1.1 and the relative thickness of the wing profile
Figure FDA0003781194670000012
The wing profile of 0.05-0.1 is used as the wing profile of the front guide vane (6);
s4, solving a function model of the front guide vane installation combination by taking the ventilation quantity as an optimization target:
ventilation and guide vane mounting angle alpha 1 The function model of the guide vane dynamic and static installation distance L and the guide vane number n, namely the function model of the front guide vane installation combination is as follows:
Figure FDA0003781194670000011
wherein x is 1 Is a leading guide vane installation angle alpha 1 In degrees; x is a radical of a fluorine atom 2 The guide vane dynamic and static installation distance L is set as mm; x is the number of 3 The number of the guide vanes is n;
s5, manufacturing the front guide vane (6) according to the wing section of the front guide vane (6) obtained in the step S3; and then, installing the front guide vane (6) on the prototype agricultural ventilator according to the function model of the front guide vane installation combination obtained in the step S4.
2. A method of improving the performance of an agricultural ventilator as claimed in claim 1, wherein: in the step S3, the chord length of the front guide vane (6) is 103mm, the lift coefficient of the wing profile of the front guide vane (6) is 0.96, and the relative thickness of the wing profile of the front guide vane (6)
Figure FDA0003781194670000021
Was 0.09.
3. A method of improving the performance of an agricultural ventilator as claimed in claim 1, wherein: the hub (3) is divided into a front part and a rear part which are buckled on the rotating shaft (2) through a nut ring.
CN202210930567.3A 2022-08-04 2022-08-04 Method for improving performance of agricultural ventilator Active CN115342068B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2338517Y (en) * 1998-06-30 1999-09-15 华耀南 Explosion-proof axial-flow electric fan for local ventilation
US20080219836A1 (en) * 2007-03-05 2008-09-11 Xcelaero Corporation Fan with heat dissipating outlet guide vanes
CN205639016U (en) * 2016-05-25 2016-10-12 株洲联诚集团有限责任公司 High and cold anti -wind sand transformer fan for EMUs
CN107131153A (en) * 2017-07-12 2017-09-05 成都华川电装有限责任公司 Aerofoil fan
CN110159564A (en) * 2019-04-23 2019-08-23 贵州永红航空机械有限责任公司 A kind of axial flow blower of low-specific-speed
CN110805568A (en) * 2019-10-18 2020-02-18 华中科技大学 Plate-shaped rear guide vane of diagonal flow fan and design method thereof
CN112528397A (en) * 2020-11-23 2021-03-19 江苏大学 Optimized design method for rear fluid director of jet fan
CN114607641A (en) * 2022-03-23 2022-06-10 珠海格力电器股份有限公司 Axial fan's stator structure and axial fan

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2338517Y (en) * 1998-06-30 1999-09-15 华耀南 Explosion-proof axial-flow electric fan for local ventilation
US20080219836A1 (en) * 2007-03-05 2008-09-11 Xcelaero Corporation Fan with heat dissipating outlet guide vanes
CN205639016U (en) * 2016-05-25 2016-10-12 株洲联诚集团有限责任公司 High and cold anti -wind sand transformer fan for EMUs
CN107131153A (en) * 2017-07-12 2017-09-05 成都华川电装有限责任公司 Aerofoil fan
CN110159564A (en) * 2019-04-23 2019-08-23 贵州永红航空机械有限责任公司 A kind of axial flow blower of low-specific-speed
CN110805568A (en) * 2019-10-18 2020-02-18 华中科技大学 Plate-shaped rear guide vane of diagonal flow fan and design method thereof
CN112528397A (en) * 2020-11-23 2021-03-19 江苏大学 Optimized design method for rear fluid director of jet fan
CN114607641A (en) * 2022-03-23 2022-06-10 珠海格力电器股份有限公司 Axial fan's stator structure and axial fan

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