CN110566504A - Coaxial double-impeller fan - Google Patents
Coaxial double-impeller fan Download PDFInfo
- Publication number
- CN110566504A CN110566504A CN201910979268.7A CN201910979268A CN110566504A CN 110566504 A CN110566504 A CN 110566504A CN 201910979268 A CN201910979268 A CN 201910979268A CN 110566504 A CN110566504 A CN 110566504A
- Authority
- CN
- China
- Prior art keywords
- impeller
- motor
- theta
- blades
- fan
- 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
Links
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- 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
- F04D29/66—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a coaxial double-impeller fan which comprises an air duct, a motor support and a motor, wherein the motor support is fixed in the air duct, the motor is fixed on the motor support, an output shaft of the motor extends out of two ends of a shell, one end of the output shaft is provided with a front impeller, the other end of the output shaft is provided with a rear impeller, the front impeller and the rear impeller are impellers with the same blades and are uniformly distributed, the front impeller is an impeller with the rear impeller, the rotation angle of the rear impeller along the rotation direction of the motor is theta, and the theta =4 pi n1s/v‑（2n+1）（θ1+θ2) /2, where θ1Is the angle between the midpoints of adjacent blades, theta2Is the angle between the middle points of the blades, s is the distance between the front impeller and the rear impeller, n1The motor rotating speed, v is the rated wind speed, and n is a natural number. The coaxial double-impeller fan effectively reduces the air outlet wind resistance and the noiseThe energy consumption is reduced, and the total air output is improved.
Description
Technical Field
The invention belongs to the technical field of fans, and particularly relates to a coaxial double-impeller fan.
Background
The fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Fans are widely used for ventilation, dust exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, and for ventilation and draught of boilers and industrial furnaces and kilns; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grain, wind tunnel wind source and air cushion boat inflating and propelling.
The utility model discloses a name is a bilobed wheel axial fan as disclosing No. CN205714872U, specifically discloses this bilobed wheel axial fan includes base, blade, preceding impeller, back impeller and motor, the base upper surface is equipped with safety net, outer casing and tripe frame, outer casing internal surface is equipped with the inner casing, outer casing one end is equipped with the safety net, the outer casing other end is equipped with the tripe frame, the inner casing upper surface is equipped with motor support, inside preceding impeller, back impeller, motor and the small-size fan of being equipped with of inner casing, preceding impeller one side is equipped with wheel hub, back impeller one side is equipped with fixing device and fixing device one side is equipped with the pillar. The double-impeller axial flow fan greatly reduces the noise of the axial flow fan, can effectively improve the working efficiency of the axial flow fan, is provided with the safety net for preventing dust in the air from entering the axial flow fan, has good anti-corrosion effect because the surface of the blade is coated with the anti-corrosion zinc coating, and prolongs the service life of the axial flow fan.
However, in the use process of the double-impeller axial flow fan, due to the blocking of the front side blades, the rear side blades can be blocked during air outlet, so that the wind resistance is increased, the noise is high, the energy consumption is increased, and the total air outlet volume is increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the coaxial double-impeller fan which can effectively reduce the air outlet wind resistance, reduce the noise, reduce the energy consumption and improve the total air output.
In order to solve the technical problem, the invention is solved by the following technical scheme: the utility model provides a coaxial bilobed wheel fan, includes dryer, motor support and motor, the dryer internal fixation has motor support, be fixed with the motor on the motor support, the output shaft of motor stretches out from the casing both ends, output shaft one end is provided with preceding impeller other end and is provided with back impeller, preceding impeller with back impeller is the impeller of same blade evenly distributed, preceding impeller does back impeller is for theta, theta =4 pi n along motor direction of rotation turned angle, theta =4 pi n1s/v-（2n+1）（θ1+θ2) /2, where θ1Is the angle between the midpoints of adjacent blades, theta2Is the angle between the middle points of the blades, s is the distance between the front impeller and the rear impeller, n1The motor rotating speed, v is the rated wind speed, and n is a natural number. The air pushed by the blade center of the front impeller of the coaxial double-impeller fan can flow out from the center of the blade gap of the rear impeller when flowing to the rear impeller, so that the blocking of the rear impeller to the front impeller is reduced, the air outlet wind resistance is effectively reduced, the noise is reduced, the energy consumption is reduced, and the total air output is increased.
In the above technical solution, preferably, four blades are uniformly distributed on the front impeller and the rear impeller, and θ = pi/4.
Compared with the prior art, the invention has the following beneficial effects: the air pushed by the blade center of the front impeller of the coaxial double-impeller fan can flow out from the center of the blade gap of the rear impeller when flowing to the rear impeller, so that the blocking of the rear impeller to the front impeller is reduced, the air outlet wind resistance is effectively reduced, the noise is reduced, the energy consumption is reduced, and the total air output is increased.
Drawings
Fig. 1 is a schematic half-section structure diagram of an embodiment of the present invention.
Fig. 2 is a perspective structural diagram of an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a front impeller or a rear impeller in an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings: referring to fig. 1 to 3, a coaxial dual-impeller fan comprises an air duct 1, a motor support 2 and a motor 3, wherein the motor support 2 is fixed in the air duct 1, the motor 3 is fixed on the motor support 2, an output shaft of the motor 3 extends out from two ends of a shell, one end of the output shaft is provided with a front impeller 4, the other end of the output shaft is provided with a rear impeller 5, the front impeller 4 and the rear impeller 5 are impellers with the same blades uniformly distributed, the front impeller 4 is an impeller with the rear impeller 5 rotating at an angle of θ along the motor rotation direction, and θ =4 n1s/2nvθ1+vθ1+2nθ2Wherein theta1Is the angle between the midpoints of adjacent blades, theta2Is the angle between the middle points of the blades, s is the distance between the front impeller 4 and the rear impeller 5, n1The rotating speed of the motor 3, v is the rated wind speed, and n is a natural number. In the present embodiment, four blades are uniformly distributed on the front impeller 4 and the rear impeller 5, and θ = pi/4. The distance between the front impeller 4 and the rear impeller 5 is the included angle theta between the middle points of the adjacent blades according to the rotating speed of the motor 31Angle theta between the midpoints of the blades2And rated wind speed v.
The calculation process is as follows: impeller angular velocity ω =2 π n1(ii) a The air flow time t = s/v from the front impeller to the rear impeller; since the air from the front impeller to the rear impeller flows out from any blade pitch center of the rear impeller to reduce the wind resistance maximally, 2 n1× s/v=1/2（θ1+θ2）+n（θ1+θ2) + θ; thus θ =4 π n1s/v-（2n+1）（θ1+θ2）/2。
The air that this kind of coaxial bilobed wheel fan front vane wheel 4's blade center promoted can flow from the center in 5 blade gaps of back impeller when flowing to back impeller 5 department, reduces the back impeller 5 and to the blockking of front vane wheel 4, and the effectual air-out windage that reduces the noise, reduces the energy consumption, promotes total air output.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (2)
1. The utility model provides a coaxial bilobed wheel fan, includes dryer (1), motor support (2) and motor (3), dryer (1) internal fixation has motor support (2), be fixed with motor (3) on motor support (2), the output shaft of motor (3) stretches out from the casing both ends, output shaft one end is provided with preceding impeller (4) the other end and is provided with back impeller (5), its characterized in that: the front impeller (4) and the rear impeller (5) are impellers with the same blades uniformly distributed, the front impeller (4) is the rear impeller (5) and the rotation angle of the front impeller (4) along the rotation direction of the motor is theta, and theta =4 pi n1s/v-（2n+1）（θ1+θ2) /2, where θ1Is the angle between the midpoints of adjacent blades, theta2Is the angle between the middle points of the blades, s is the distance between the front impeller (4) and the rear impeller (5), n1The rotating speed of the motor (3), v is the rated wind speed, and n is a natural number.
2. A coaxial twin-impeller fan in accordance with claim 1 wherein: four blades are uniformly distributed on the front impeller (4) and the rear impeller (5), and theta = pi/4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910979268.7A CN110566504A (en) | 2019-10-15 | 2019-10-15 | Coaxial double-impeller fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910979268.7A CN110566504A (en) | 2019-10-15 | 2019-10-15 | Coaxial double-impeller fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110566504A true CN110566504A (en) | 2019-12-13 |
Family
ID=68785024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910979268.7A Pending CN110566504A (en) | 2019-10-15 | 2019-10-15 | Coaxial double-impeller fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110566504A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832283A (en) * | 2010-05-06 | 2010-09-15 | 杭州小尔科技有限公司 | Three- impeller axial flow fan of subway traction motor brake cooling system |
| US20110142612A1 (en) * | 2009-12-14 | 2011-06-16 | The University Of Tokyo | Counter-rotating axial flow fan |
| CN205714872U (en) * | 2016-06-22 | 2016-11-23 | 常山县吉华风机厂 | A kind of double-impeller axial flow fan |
| CN206582136U (en) * | 2017-03-14 | 2017-10-24 | 浙江上建风机有限公司 | Fire-fighting high-temperature smoke discharging propeller fan |
| CN209053821U (en) * | 2018-10-15 | 2019-07-02 | 广东美的白色家电技术创新中心有限公司 | To counter-rotating fan |
| CN210715259U (en) * | 2019-10-15 | 2020-06-09 | 浙江上建风机有限公司 | Coaxial double-impeller fan |
-
2019
- 2019-10-15 CN CN201910979268.7A patent/CN110566504A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110142612A1 (en) * | 2009-12-14 | 2011-06-16 | The University Of Tokyo | Counter-rotating axial flow fan |
| CN101832283A (en) * | 2010-05-06 | 2010-09-15 | 杭州小尔科技有限公司 | Three- impeller axial flow fan of subway traction motor brake cooling system |
| CN205714872U (en) * | 2016-06-22 | 2016-11-23 | 常山县吉华风机厂 | A kind of double-impeller axial flow fan |
| CN206582136U (en) * | 2017-03-14 | 2017-10-24 | 浙江上建风机有限公司 | Fire-fighting high-temperature smoke discharging propeller fan |
| CN209053821U (en) * | 2018-10-15 | 2019-07-02 | 广东美的白色家电技术创新中心有限公司 | To counter-rotating fan |
| CN210715259U (en) * | 2019-10-15 | 2020-06-09 | 浙江上建风机有限公司 | Coaxial double-impeller fan |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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