CN106015094A - Fan blade - Google Patents
Fan blade Download PDFInfo
- Publication number
- CN106015094A CN106015094A CN201610510271.0A CN201610510271A CN106015094A CN 106015094 A CN106015094 A CN 106015094A CN 201610510271 A CN201610510271 A CN 201610510271A CN 106015094 A CN106015094 A CN 106015094A
- Authority
- CN
- China
- Prior art keywords
- blade
- kink
- suction surface
- flabellum
- pressure
- 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
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
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
- F04D29/386—Skewed blades
-
- 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
- F04D29/388—Blades characterised by construction
-
- 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
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/305—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the pressure side of a rotor blade
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/306—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the suction side of a rotor blade
Abstract
The invention discloses a fan blade comprising a fan shaft (1) and a plurality of blades (2) evenly installed on the fan shaft. Each blade (2) is provided with a suction force face (21) and a pressure face (22), wherein the top of the blade (2) is bent towards the suction force face (21) or the pressure face (22) to form a bent part (23). The technical scheme has the remarkable beneficial effects that air amount losses are small and the running noise is low and meanwhile has the beneficial effects that the process is simple, the manufacturing cost is low, and industrial production is easy.
Description
Technical field
The present invention relates to a kind of electric fan, be specifically related to the flabellum of a kind of axial-flow type electric fan.
Background technology
Existing fan commonly used smooth curvature continuous print flabellum, the surface of whole flabellum simply comprises traditional pressure face and suction surface, without special construction, blowing flow field is optimized, particularly at the blade tip of flabellum, pressure differential due to pressure face Yu suction surface, air-flow can flow towards the suction surface that pressure is low from the pressure that pressure is high, and build-up of pressure loss causes wind loss, and on the other hand the turbulent flow of blade tip increases pneumatic noise.Application No. " 201310514402.9 ", the application for a patent for invention of entitled " fan blade and there is the electric fan of this blade ", by being provided with for blocking the whirlpool blocking unit that whirlpool is formed at blade tip end, provide a kind of minimizing wind loss, the solution of fall low wind noise, but above-mentioned technical side needs to increase parts at blade tip end, and a quality being the increase in blade makes motor load increase, air quantity may be increased but cause capacity loss, realize air quantity increase as increased power；Two is that the complex process of flabellum is with high costs, and die cost is just high than traditional, and the defect rate in production is the highest, is not easy to commercial production；Three is to increase whirlpool blocking unit at tip, so-called whirlpool blocking unit lacks essential features, analyze from technical logic and at least claim 2 is incorporated to claim 1 and just has authorization, even if therefore having patented product is the most also that the edge of the blade tip end along blade body bends in vertical state to the suction surface of blade body；Four is that blade tip stress is too big, and whirlpool blocking unit is easily deformed, furthermore noise is relevant to 6 powers of speed, and the wind cutting area of whirlpool blocking unit is excessive, and noise is impossible little；Five is that market the most fully shows that technique scheme does not has vitality, and the product of this invention almost be can not see on the market.The design of flabellum is a complicated engineering, if from high efficiency angle, different operating modes cause blade design difference huge, and fundamental need is specifically designed, and optimizes endless.In a word, prior art or there is the problem that the big noise of wind loss is big, otherwise there is with high costs being not easy to of complex manufacturing produces.
Summary of the invention
The present invention provides a kind of flabellum, it is possible to resolve the problem that the wind loss of existing electric fan is big, noise is big, and technique is simple simultaneously, low cost of manufacture is prone to commercial production.
For solving above-mentioned technical problem, the present invention provides a kind of flabellum, and including fan axle and some blades being uniformly arranged on fan axle, described blade has suction surface and pressure face, and the top of blade bends to suction surface or suction surface, forms a kink.How blade is arranged on fan axle is the routine techniques in industry, is fixedly mounted on fan axle outer peripheral face generally by root, and blade is one-time formed integrative-structure with fan axle；The top of blade refers to that blade generally refers to the part near fan axle away from fan axle the part of relatively close blade tip, the root of blade, and top is relative concept with root；It is not that the whole of blade top half bend to suction surface or pressure face that the top of blade bends to suction surface or pressure face, the top of kink i.e. blade cylindrical is less than 0.5 to the length of folding line and the ratio of blade radius, practice is advisable between generally 0.05-0.45,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45 all can, according to actual condition adjust.Described kink bends to suction surface or pressure face, it must be noted that a little kink can not be vertical with blade, otherwise build-up of pressure face and suction surface reduce, and then the effective area of blade acting also can reduce, and kink can not bend to pressure face and suction surface as the scheme in background technology simultaneously, otherwise can cause noise abruptly increase because wind cutting area volume increases, the problem in background technology arises that.Kink is substantially a part for blade, is positioned at the top of blade, and kink can be effectively blocked air-flow and flow from the higher-pressure region of pressure face to the low-pressure area of suction surface, reduces wind loss, and the formation of minimizing blade tip whirlpool, drops low wind noise.Testing through reality, wind-force can improve 20%, and noise can reduce 3-4 decibel.
Further, the top of described kink i.e. blade cylindrical is less than 0.5 to the greatest length of folding line and the ratio of blade radius.The top of kink i.e. blade cylindrical is less than 0.5 to the greatest length of folding line and the ratio of blade radius, it is advisable between generally 0.05-0.45,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4,0.45,0.5 all can, according to actual condition adjust.The product that instantaneous velocity is radius and angular velocity when blade rotates, the speed of blade tip is tens times of blade root, maintains certain blast again simultaneously, if the length of kink is excessive with the ratio of blade radius, under common rotating speed, pressure cannot meet needs；Increasing speed that to may result in the pressure of kink too big for reaching pressure requirements, simply kink deformation is even ruptured.Therefore, ratio should be not excessive, and the top of kink i.e. blade cylindrical to the length of folding line and the ratio of blade radius should be less than 0.5, in actual production, ratio be about 0.25 technique effect the best.
Further, described kink and the angle of suction surface or pressure face are 1450To 1750Between.When kink bends to suction surface, described angle refers to the angle between kink and suction surface, and angle is 1450To 1750Between；When kink bends to pressure face, described angle refers to the angle between kink and pressure face, and angle is 1450To 1750Between.The kink of the present invention can not bend to pressure face and suction surface simultaneously, but kink can select to bend to pressure face or suction surface, so the angle correspondence angle that to be the side of kink overbending direction corresponding.No matter how kink designs, and all can not be entirely prevented from air-flow and flow towards suction surface from pressure, the angle 145 between kink and suction surface or pressure face after tested0、1500、1550、1600、1650、1700、1750All can have good economy, the impact of performance, kink angle is 1600During left and right, effect is the best, and economy, integrated performance index are the most excellent.Fan conventional in daily life, kink is 160 with the angle of suction surface0Left and right just can well be reduced air-flow and be flowed towards suction surface from pressure, and the kink simultaneously rotated will not have again the biggest deformation pressure to blade.
Further, the length of described kink is gradually increased to the trailing edge of blade from the leading edge of blade tip.The leading edge of blade tip does not has kink, and the starting point of kink overlaps with blade tip leading edge, and toward the trailing edge of blade, the length of kink is gradually increased.The leading edge of blade tip is with a some wind cutting, it is possible to reduce noise, and this is also that the fan that the most a lot of 5 blades are even above at present is designed to sharper reason blade tip leading edge, silent as point of a knife pierces through air, reduces noise and also reduces the resistance of rotation；Rotate flabellum be also from the leading edge of blade tip toward trailing edge gradually to gas pressurized, more the biggest toward trailing edge pressure, the pressure reduction causing air-flow to flow towards blade suction surface from blade pressure is the biggest, therefore along with the increase of pressure reduction, it is gradually increased the length of kink can effectively reduce air-flow and flow towards suction surface from pressure, improves air-supply efficiency.
Further, described kink is ganoid curved surface.Kink together rotates with blade, air-flow relative vane and kink flow, blade high speed rotating, air-flow relative velocity is the biggest, but also break-in to be occurred, therefore, smooth curved surface can reduce fluid air flow and drastically change the whirlpool of formation, and then minimizing capacity loss, reduce and run noise.
Further, described kink outer surface is connected with suction surface smooth outer surface ground.As above, blade high speed rotating, air-flow relative velocity is the biggest, but also break-in to be occurred, and therefore, smooth curved surface can reduce fluid air flow and drastically change the whirlpool of formation, and then reduces capacity loss, reduces and runs noise for reason.
Compared with existing flabellum, the present invention can effectively reduce operation noise, reduces wind loss, and technique is simple simultaneously, low cost of manufacture is prone to commercial production, has the highest market competition advantage.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of a kind of flabellum embodiment of the present invention；
Fig. 2 is the schematic diagram of a kind of flabellum embodiment of the present invention；
Fig. 3 is the another schematic diagram of a kind of flabellum embodiment of the present invention；
Fig. 1 to Fig. 3 includes:
Fan axle 1；Blade 2；Suction surface 21, pressure face 22, kink 23.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Accompanying drawing 1 embodiment, several blades 2 are uniformly arranged on fan axle 1, and blade 1 top bends to suction surface 21, forms a kink 23, and the length of described kink 23 is gradually increased to the trailing edge of blade 2 from blade 2 top leading edge.The design of flabellum is a complicated engineering, it is huge that different operating modes cause blade 2 to design difference, usually to promote air quantity and the efficiency of fan by adjusting the curvature of blade 2, radian, inclination angle, lobe numbers and crimp structure etc., and reduce flabellum noise in systems.The present invention is not concerned with considering the concrete design of a certain kind of vane curvature, radian, inclination angle, lobe numbers and crimp, only it is to provide a kind of technical scheme solving problem, rather than realize the concrete structure design drawing under specific operation, accompanying drawing 1 simply preferred embodiment, kink 23 bends to suction surface 21.In actual production; the flabellum designed under different operating modes has bigger difference; but as long as the top of blade 2 is bent to form kink 23 and non-perpendicular bending to suction surface or suction surface, both fall within the protection domain of the technical program in order to the design reducing wind loss, reducing noise.
Accompanying drawing 2 is the embodiment that kink 23 bends to pressure face 22, and the top of blade 2 bends to suction surface 22, and the top of blade 2 has from leading edge to trailing edge and is all bent to form kink 23, is a preferred embodiment of claim 1.Kink 23 begins to bending from the leading edge of vane tip, it is possible to increase prevent the pretective acreage that air-flow flows towards suction surface from pressure.
Accompanying drawing 3 embodiment, the top of blade 2 bends to suction surface 21, and the length of described kink 23 is gradually increased to the trailing edge of blade from blade tip leading edge, is a preferred embodiment of claim 2.For the most whole blade of blade tip leading edge 2, comparing sharp point, it is possible to reduce wind cutting area, beneficially blade 2 punctures air-flow when high speed rotating, and this is also that sharp rather than the most blunt principle is all compared in supersonic speed opportunity of combat front end.The technical scheme of the wind cutting area the biggest with background technology is entirely different, and low wind noise can preferably drop in the technical program, can reduce 3-4 decibel through actual measurement.
Compared with existing flabellum, the present invention can effectively reduce operation noise, reduces wind loss, and technique is simple simultaneously, low cost of manufacture is prone to commercial production, has the highest market competition advantage.
Finally should be noted that; above example is only in order to illustrate technical scheme; rather than limiting the scope of the invention; although having made to explain to the present invention with reference to preferred embodiment; it will be understood by those within the art that; technical scheme can be modified or equivalent, without deviating from the spirit and scope of technical solution of the present invention.
Claims (6)
1. a flabellum, including fan axle (1) and some blades (2) being uniformly arranged on fan axle, described blade has suction surface (21) and pressure face (22), it is characterised in that: the top of blade (2) bends to suction surface (21) or pressure face (22), forms a kink (23).
A kind of flabellum the most according to claim 1, it is characterised in that: the length of described kink (23) leading edge from blade (2) top is gradually increased to the trailing edge of blade (2).
A kind of flabellum the most according to claim 1 and 2, it is characterised in that: the greatest length of top i.e. blade (2) cylindrical of described kink (23) to folding line and the ratio of blade radius are less than 0.5.
A kind of flabellum the most according to claim 3, it is characterised in that: the angle between described kink (23) and suction surface (21) or pressure face (22) is 1450To 1750Between.
A kind of flabellum the most according to claim 1, it is characterised in that: described kink (23) is ganoid curved surface.
A kind of flabellum the most according to claim 1, it is characterised in that: the bending junction of described kink (23) and pressure face (22) or suction surface (21) is for being smoothly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610510271.0A CN106015094A (en) | 2016-07-02 | 2016-07-02 | Fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610510271.0A CN106015094A (en) | 2016-07-02 | 2016-07-02 | Fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106015094A true CN106015094A (en) | 2016-10-12 |
Family
ID=57104931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610510271.0A Pending CN106015094A (en) | 2016-07-02 | 2016-07-02 | Fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106015094A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640759A (en) * | 2016-12-13 | 2017-05-10 | 广东美的环境电器制造有限公司 | Axial-flow type fan |
| CN107543365A (en) * | 2017-09-20 | 2018-01-05 | 合肥华凌股份有限公司 | Refrigerator and its fast cooling device |
| CN107816385A (en) * | 2017-05-26 | 2018-03-20 | 福建威曼动力科技有限公司 | Air-cooled power low noise unit provided with independent ventiduct |
| CN108180168A (en) * | 2017-12-27 | 2018-06-19 | 泛仕达机电股份有限公司 | A kind of compound bending fan blade and the fan including the blade |
| CN108302052A (en) * | 2017-01-12 | 2018-07-20 | 日本电产株式会社 | In-line arrangement aerofoil fan |
| WO2018153119A1 (en) * | 2017-02-27 | 2018-08-30 | 广东美的环境电器制造有限公司 | Axial flow fan blade and electric fan having same |
-
2016
- 2016-07-02 CN CN201610510271.0A patent/CN106015094A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640759A (en) * | 2016-12-13 | 2017-05-10 | 广东美的环境电器制造有限公司 | Axial-flow type fan |
| CN108302052A (en) * | 2017-01-12 | 2018-07-20 | 日本电产株式会社 | In-line arrangement aerofoil fan |
| CN108302052B (en) * | 2017-01-12 | 2020-10-27 | 日本电产株式会社 | In-line axial flow fan |
| WO2018153119A1 (en) * | 2017-02-27 | 2018-08-30 | 广东美的环境电器制造有限公司 | Axial flow fan blade and electric fan having same |
| CN107816385A (en) * | 2017-05-26 | 2018-03-20 | 福建威曼动力科技有限公司 | Air-cooled power low noise unit provided with independent ventiduct |
| CN107543365A (en) * | 2017-09-20 | 2018-01-05 | 合肥华凌股份有限公司 | Refrigerator and its fast cooling device |
| CN107543365B (en) * | 2017-09-20 | 2020-10-09 | 合肥华凌股份有限公司 | Refrigerator and rapid cooling device thereof |
| CN108180168A (en) * | 2017-12-27 | 2018-06-19 | 泛仕达机电股份有限公司 | A kind of compound bending fan blade and the fan including the blade |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106015094A (en) | Fan blade | |
| US11506211B2 (en) | Counter-rotating fan | |
| JP3174736U (en) | Steam turbine guide blade | |
| CN108386389B (en) | Centrifugal compressor diffuser structure with blades, casing and hub fused | |
| US10036392B2 (en) | Axial fan for industrial use | |
| JP2009531593A5 (en) | ||
| CN104487712A (en) | Propeller fan, and fan, air-conditioner and outdoor unit for hot-water supply provided with propeller fan | |
| CN101408196B (en) | Blower | |
| JP4888436B2 (en) | Centrifugal compressor, its impeller and its operating method | |
| EP3835591B1 (en) | Impeller for centrifugal pump, particularly for a recessed-impeller pump, and pump with such an impeller | |
| JP5314441B2 (en) | Centrifugal hydraulic machine | |
| CN108412809A (en) | A kind of baffle liner, centrifugal blower and air conditioner | |
| KR20180039548A (en) | Centrifugal impeller having backward blades using dual gradient sectional shape type | |
| CN108980103B (en) | Design method of forward multi-wing centrifugal ventilator impeller with inlet winglet | |
| EP3369938B1 (en) | Compressor impeller and method for manufacturing same | |
| CN205908510U (en) | Fan blade | |
| CN206816552U (en) | Axial-flow windwheel and air conditioner | |
| WO2020125128A1 (en) | Axial flow fan blade, ventilation device and air conditioner | |
| CN104791301B (en) | One kind is curved to plunder aluminium alloy axial blade | |
| KR101645209B1 (en) | Centrifugal impeller having airfoil suction surface type backward twisted blades | |
| CN214465105U (en) | High-efficiency low-noise centrifugal fan | |
| CN111480008A (en) | Diffuser blade and centrifugal compressor | |
| CN112303010A (en) | High-efficiency low-noise centrifugal fan | |
| CN110410259B (en) | Blade head overhanging type rotating wheel | |
| CN211737550U (en) | Backward centrifugal cross-section noise reduction type centrifugal fan blade |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161012 |
|
| WD01 | Invention patent application deemed withdrawn after publication |