CN105673559B - Efficient meridionally-accelerated axial flow fan with casing - Google Patents
Efficient meridionally-accelerated axial flow fan with casing Download PDFInfo
- Publication number
- CN105673559B CN105673559B CN201610226404.1A CN201610226404A CN105673559B CN 105673559 B CN105673559 B CN 105673559B CN 201610226404 A CN201610226404 A CN 201610226404A CN 105673559 B CN105673559 B CN 105673559B
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- CN
- China
- Prior art keywords
- air duct
- internal diameter
- inner cylinder
- fan
- air
- 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.)
- Expired - Fee Related
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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
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
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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
- F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
-
- 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
- F04D29/545—Ducts
- F04D29/547—Ducts having a special shape in order to influence fluid flow
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of efficient meridionally-accelerated axial flow fan with casing, including air duct, motor, fan blade, wind wheel, the wind wheel is shaped as a cone bar shape, air duct is the tubular body of trapezium structure, along air current flow direction, air duct front portion internal diameter is bigger than air duct rear portion internal diameter, the fan blade external diameter is more than air duct rear portion internal diameter, less than air duct front portion internal diameter, air duct front end is fixedly connected with current collector, rear end connects guide shell, and the guide shell is made up of outer barrel, inner cylinder, stator, and the inner cylinder leading portion external diameter is equal to wind wheel rear end face external diameter；One T-shaped support is set inside inner cylinder, and uniform 13 radial directions water conservancy diversion leaf between the inside and outside cylinder of motor is fixedly connected with by T-shaped support, water conservancy diversion leaf section is aerofoil profile.When air-flow passes through rotary blade, the leakage of leaf top reduces, and pressure increase, fan efficiency improves, and air-flow improves fan efficiency by the stator rectification in guide shell in addition.
Description
Technical field
The present invention relates to a kind of meridian acceleration axial fan, particularly a kind of efficient meridionally-accelerated axial flow fan.
Background technology
Meridian acceleration axial fan is to be gained the name by impeller meridian plane streamline with axis oblique, is between centrifugal fan
A kind of form between axial fan, have the height of the big flow coefficient of axial fan, high efficiency and centrifugal fan concurrently
The advantages of pressure coefficient, wide working range.As shown in figure 1, existing meridionally-accelerated axial flow fan by air duct 1, motor 6, wind wheel,
Fan blade 2 is formed, and several skew wind leaves 2 are fixed on wind wheel, and sky is in taper hole shape in its air duct 1, and wind wheel is cylindrical in cone bar shape.
The defects of this blower fan, is：Fan blade top outer barrel diameter is identical with the outer barrel top external diameter of fan blade exit portion,
To ensure that fan blade normally rotates, certain gap between fan blade and outer barrel be present, generally gap is larger between its fan blade and air duct,
The leakage loss of leaf top is larger.
The content of the invention
It is an object of the invention to overcome above-mentioned defect, there is provided a kind of efficient meridian acceleration axle stream wind with casing
Machine.
To achieve the above object, the technical scheme is that：A kind of efficient meridionally-accelerated axial flow fan with casing, bag
Air duct, motor, fan blade, wind wheel are included, the wind wheel is shaped as a cone bar shape, and air duct is the tubular body of trapezium structure, along gas
Flow direction is flowed, air duct front portion internal diameter is bigger than air duct rear portion internal diameter, and the fan blade external diameter is more than air duct rear portion internal diameter, less than air duct
Anterior internal diameter, air duct front end are fixedly connected with current collector, and rear end connection guide shell, the guide shell is by outer barrel, inner cylinder, stator group
Into the inner cylinder leading portion external diameter is equal to wind wheel rear end face external diameter；One T-shaped support is set inside inner cylinder, and fixed by T-shaped support
Uniform 13 radial directions water conservancy diversion leaf between the connection inside and outside cylinder of motor, water conservancy diversion leaf section is aerofoil profile.
Air duct front portion internal diameter is bigger than air duct rear portion internal diameter 8 millimeters.The outer barrel rear end face is set with for connecting airduct
Or for being fixedly connected with the flange of blower fan.
The beneficial effects of the present invention are：Air-flow is guided by current collector, improves gas mobility status；Air-flow enters inlet air
Leaf, on the one hand because fan blade does work, air-flow velocity improves, blast increase, on the other hand because circulation area reduces, air-flow velocity
Improve, along the increase of meridional stream line air velocity, impeller acting ability enhancing, blast increase；Because air duct rear portion internal diameter is less than wind
Leaf external diameter, backflow of the impeller outlet gases at high pressure along blade tip clearance is blocked, therefore leakage loss can be greatly reduced；Air-flow exists
Guided in guide shell by stator into axial flow, and rear guide vane plays a part of diffusion simultaneously, and fan blade outlet is curled up into air-flow
Kinetic energy converts the static pressure for being recovered as air-flow, improves the stagnation pressure liter of blower fan, fan efficiency increase.
Brief description of the drawings
Fig. 1 is the structural representation of the meridionally-accelerated axial flow fan of prior art；
Fig. 2 is the structural representation of the efficient meridionally-accelerated axial flow fan with casing of the present invention；
Fig. 3 is partial enlarged drawing at the A in Fig. 2；
Fig. 4 is along B-B sectional view in Fig. 2.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figures 2 to 4, the efficient meridionally-accelerated axial flow fan of the invention with casing, including air duct 1, fan blade 2,
Water conservancy diversion leaf 5, motor 6, air-flow are by current collector 7, T-shaped support 8, wind wheel 9 etc..
Air duct 1 is shaped as a tubular body, and wind wheel 9 is shaped as a cone bar shape, be additionally provided with by outer barrel 4, inner cylinder 3,
The guide shell that stator 5 forms, air duct 1 is trapezium structure, and along air current flow direction, the internal diameter of air duct 1 is in different size, and air duct is anterior
1 internal diameter is bigger 8 millimeters than the rear portion internal diameter of air duct 1, and the external diameter of fan blade 2 is more than the rear portion internal diameter of air duct 1, and it is anterior that the external diameter of fan blade 2 is less than air duct 1
Internal diameter, the front/rear end of air duct 1 are respectively equipped with ring flange, and the forward flange disk of air duct 1 is fixed with the ring flange of current collector 7 to be docked, after air duct 1
Ring flange is fixedly connected with the ring flange of outer barrel 4；Inner cylinder 3 is a tubular body, and the leading portion external diameter of inner cylinder 3 is equal to wind wheel rear end face external diameter；
Inner cylinder 3 is internally provided with a T-shaped support 8,8 four through holes of T-shaped support, and motor 6 is bolted to connection with T-shaped support 8；It is interior
Uniform 13 radial direction water conservancy diversion leaf 5, the section of water conservancy diversion leaf 5 are aerofoil profile between outer barrel.
Air-flow is guided by current collector 7, improves gas mobility status, reduces import local losses.Air duct 1 is anterior for pipe
Shape body, wind wheel are expanding prick cylinder, and air-flow enters fan blade, and on the one hand because fan blade does work, air-flow velocity improves, blast increase,
On the other hand because axial annular circulation area reduces, air-flow velocity improves, blast increase.
It can be seen from Fig. 3 that the rear portion internal diameter of air duct 1 is less than the external diameter of fan blade 2, the airflow reflux flowing in blade tip clearance is blocked,
Reduce the leakage loss of leaf top.
Water conservancy diversion leaf 5 is aerofoil section, and during airflow passes water conservancy diversion leaf 5, its direction is adjusted to axial direction, and stator plays simultaneously
The effect of diffusion, the kinetic energy conversion that fan blade outlet is curled up to air-flow are recovered as the static pressure of air-flow, improve the stagnation pressure liter of blower fan, blower fan
Efficiency increases.The adpting flange of the rear end face of outer barrel 4 is used to be connected with airduct or for fixing blower fan.
Claims (3)
1. a kind of efficient meridionally-accelerated axial flow fan with casing, including air duct（1）, motor（6）, fan blade（2）, wind wheel（9）, its
It is characterised by：The wind wheel（9）Be shaped as a cone bar shape, air duct（1）For the tubular body of trapezium structure, along air current flow side
To air duct（1）Anterior internal diameter compares air duct（1）Rear portion internal diameter is big, the fan blade（2）External diameter is more than air duct（1）Rear portion internal diameter, is less than
Air duct（1）Anterior internal diameter, air duct（1）Front end is fixedly connected with current collector（7）, rear end connection guide shell, the guide shell is by outer barrel
（4）, inner cylinder（3）, water conservancy diversion leaf（5）Composition, the inner cylinder（3）Leading portion external diameter is equal to wind wheel rear end face external diameter；Inner cylinder（3）Inside is set
Put a T-shaped support（8）, and pass through T-shaped support（8）It is fixedly connected with motor（6）, inner cylinder（3）, outer barrel（4）Between uniform 13 footpaths
To water conservancy diversion leaf（5）, water conservancy diversion leaf（5）Section is aerofoil profile.
2. the efficient meridionally-accelerated axial flow fan according to claim 1 with casing, it is characterised in that：The air duct（1）
Anterior internal diameter compares air duct（1）Rear portion internal diameter is big 8 millimeters.
3. the efficient meridionally-accelerated axial flow fan according to claim 1 with casing, it is characterised in that：The outer barrel（4）
Rear end face, which is provided with, to be used to connect airduct or the flange for being fixedly connected with blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610226404.1A CN105673559B (en) | 2016-04-13 | 2016-04-13 | Efficient meridionally-accelerated axial flow fan with casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610226404.1A CN105673559B (en) | 2016-04-13 | 2016-04-13 | Efficient meridionally-accelerated axial flow fan with casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105673559A CN105673559A (en) | 2016-06-15 |
| CN105673559B true CN105673559B (en) | 2018-04-06 |
Family
ID=56310190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610226404.1A Expired - Fee Related CN105673559B (en) | 2016-04-13 | 2016-04-13 | Efficient meridionally-accelerated axial flow fan with casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105673559B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224265B (en) * | 2016-08-24 | 2019-01-08 | 宁波高新区若水智创科技有限公司 | Turbocharging cooling hair dryer |
| CN109779948B (en) * | 2019-01-17 | 2021-01-05 | 沈阳航空航天大学 | Plasma type blade top gap sealing method for improving performance of axial flow fan |
| CN110159564B (en) * | 2019-04-23 | 2020-06-19 | 贵州永红航空机械有限责任公司 | Axial flow fan with low specific speed |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2038958U (en) * | 1988-10-15 | 1989-06-07 | 广东省韶关风机厂 | Axial flow type electric fan |
| CN2436701Y (en) * | 2000-04-16 | 2001-06-27 | 荣毅 | Bidirectional ventilator |
| CN201078341Y (en) * | 2007-09-03 | 2008-06-25 | 刘福祥 | High effective and low noise flame-proof type axial flow type local fan for mine |
| JP4882939B2 (en) * | 2007-09-25 | 2012-02-22 | 株式会社日立プラントテクノロジー | Movable blade axial flow pump |
| CN101576094A (en) * | 2008-05-07 | 2009-11-11 | 台达电子工业股份有限公司 | Fan and flow-guided structure thereof |
| EP2369136B1 (en) * | 2010-03-12 | 2012-12-19 | Techspace Aero S.A. | Weight-reduced single-piece multi-stage drum of an axial flow compressor |
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2016
- 2016-04-13 CN CN201610226404.1A patent/CN105673559B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN105673559A (en) | 2016-06-15 |
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