CN206246413U - A kind of forward multiple wing centrifugal fan - Google Patents
A kind of forward multiple wing centrifugal fan Download PDFInfo
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- CN206246413U CN206246413U CN201621069021.XU CN201621069021U CN206246413U CN 206246413 U CN206246413 U CN 206246413U CN 201621069021 U CN201621069021 U CN 201621069021U CN 206246413 U CN206246413 U CN 206246413U
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Abstract
The utility model discloses a kind of forward multiple wing centrifugal fan, including wheel hub and blade, blade is torsion structure, the air intake end face of blade and/or the center line of air-out end face helically linear structure, the inlet angle and/or the angle of outlet of blade along its axis direction at least partly.Set by by blade twist so that the center line of blade air intake end face and/or air-out end face helically linear structure, so as to change the shape of blade so that inlet angle is differed blade with the angle of outlet everywhere.Under in working order, on the one hand change inlet angle so that blade axial direction diverse location contact air-flow when it is more smooth, reduce kinetic energy rejection；On the other hand due to the different Shedding Vortexes so as to upset blade trailing edge of the angle of outlet, noise can effectively be suppressed.Using the blade of the structure type, vorticity has decline at the air-out tubulence energy and air intake of forward multiple wing centrifugal fan, so as to reduce fan overall noise.
Description
Technical field
The utility model belongs to the structure-design technique field of centrifugal fan blade, and in particular to a kind of forward multiple wing centrifugal
Fan.
Background technology
Centrifugal fan be it is a kind of by fluid from fan axial direction suction after fluid circumferencial direction is got rid of using centrifugal action
The fan form gone out, common are air blower, smoke exhaust ventilator etc..
Multiple wing centrifugal fan is one kind of centrifugal fan, generally includes two ends wheel hub, middle wheel hub, and be arranged at adjacent
Multiple blades between two wheel hubs, usual centrifugal fan generally metal material, wheel hub is molded with blade by metallic plate punching,
Blade is connected by the fixed forms such as riveting and two ends wheel hub with middle wheel hub afterwards.
Traditional blade shape is planar sheet or arc-shaped flaky structure, and blade is arranged at wheel hub in the way of annular array
On periphery, due to blade type structure linear in the longitudinal direction, therefore each blade and individual blade from top to bottom each
Inlet angle at position is consistent with the angle of outlet, but because the entrance angle of the axially different position air-flow in fan inside is different, therefore
Identical inlet angle is difficult to ensure that blade with the angle of outlet, and air intake is smooth everywhere, and trailing edge in blade after air-flow air-out is formed
Shedding Vortex so that the noise of fan is larger, and fan performance is poor, influences Consumer's Experience.
A kind of cabinet-type air conditioner indoor machine centrifugal (patent No. as disclosed in the prior art：200820237803.9),
Its scope for only defining vane inlet angle and exit angle, but entrance angle is throughout one with exit angle
Cause, it is difficult to realize changing the purpose for importing and exporting airflow direction.
A kind of and for example variable cross-section forward multiple wing centrifugal fan (patent No.：200710151027.0), the centrifugal fan is
The scope of optimal air intake angle and optimal air outlet angle is determined, but the inlet angle of whole blade is constant with the angle of outlet
, however it remains above-mentioned technical problem.
Therefore, in view of problem above, it is necessary to a kind of new centrifugal fan structure is proposed, by the shape for changing blade
Shape so that inlet angle is differed blade with the angle of outlet everywhere, the position while change blade contact air-flow and air-flow come off, optimization
Fan airstream is distributed and effectively reduces the Shedding Vortex of blade trailing edge, improves the noise of fan, improves the performance of fan.
Utility model content
In view of this, the utility model provides a kind of forward multiple wing centrifugal fan, is set by by blade twist, changes
The shape of blade so that inlet angle is differed blade with the angle of outlet everywhere, while change blade contact air-flow being come off with air-flow
Position, the effectively distribution of optimization fan airstream and the Shedding Vortex of reduction blade trailing edge, improves the noise of fan, improves the property of fan
Energy.
According to a kind of forward multiple wing centrifugal fan that the purpose of this utility model is proposed, including wheel hub and it is arranged at wheel hub
Some blades of upper circular array distribution, the angle formed between blade air intake and wheel hub inner circle is inlet angle, blade air-out
The angle formed between end and wheel hub are cylindrical is the angle of outlet, and the blade is torsion structure, the inlet angle of blade and/or angle of outlet edge
Its axis direction is at least partly.
Preferably, the center line of the air intake end face of the blade and/or air-out end face helically linear structure.
Preferably, at least inlet angle and/or the angle of outlet of blade is along its axis direction progressively increasing or decreasing.
Preferably, the blade is for torsion or left and right are reversed up and down.
Preferably, the blade is along the torsional deflection in whole or in part of its axis direction, the air intake end face of the blade and/or
The center line of air-out end face helically linear structure.
Preferably, the blade along thereon, the center line torsional deflection in whole or in part of lower surface, the air intake of the blade
The center line of end face and/or air-out end face helically linear structure.
Preferably, after blade twist, upper surface center line intersects at a point of contact with the projection of lower surface center line, is cut with this
Point does the tangent line of upper surface center line and lower surface center line respectively, and two angles of tangent line form blade twist angle, the leaf
Piece torsion angle is 0-45 °.
Preferably, the blade is strip arc shaped blade, and the locating slot for installing blade, upside are provided with the wheel hub
Locating slot intersects at the point of contact with the projection of downside locating slot, and blade two ends are respectively arranged in the upside locating slot and downside
Torsion structure is formed in locating slot.
Preferably, the blade is integrated the torsion structure of machine-shaping.
Compared with prior art, the advantage of forward multiple wing centrifugal fan disclosed in the utility model is：
Set by by blade twist so that the center line of blade air intake end face and air-out end face helically linear structure,
Change blade shape so that blade inlet angle is differed with the angle of outlet everywhere.Under in working order, on the one hand change
Inlet angle so that blade axial direction diverse location contact air-flow when it is more smooth, reduce kinetic energy rejection；On the other hand due to outlet
The different Shedding Vortexes so as to upset blade trailing edge in angle, can effectively suppress noise.Using the blade of the structure type, forward direction is more
Vorticity has decline at the air-out tubulence energy and air intake of wing centrifugal fan, so as to reduce fan overall noise.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of forward multiple wing centrifugal fan.
Fig. 2 is Leaf positional distribution figure.
Fig. 3 is the front view of blade.
Fig. 4 is top view when blade is not reversed.
Fig. 5,6 are the top view after blade twist.
Fig. 7 a are the blade surface tubulence energy distribution map not twisted.
Fig. 7 b are the blade surface tubulence energy distribution map after twisting.
Fig. 8 is the left view of forward multiple wing centrifugal fan.
Fig. 9 a are the blade not twisted near fan intermediate cross-section A Vorticity Distribution cloud atlas.
Fig. 9 b are that the blade after twisting is close to fan intermediate cross-section A Vorticity Distribution cloud atlas.
Figure 10 a are the blade not twisted near fan end cross-sectional B Vorticity Distribution cloud atlas.
Figure 10 b are that the blade after twisting is close to fan end cross-sectional B Vorticity Distribution cloud atlas.
The title of the digital or alphabetical representative corresponding component in figure：
1st, wheel hub 2, blade 3, center line 4, centre of twist axle
Specific embodiment
Traditional blade shape is planar sheet or arc-shaped flaky structure, and blade is arranged at wheel hub in the way of annular array
On periphery, due to blade type structure linear in the longitudinal direction, therefore each blade and individual blade from top to bottom each
Inlet angle at position is consistent with the angle of outlet, but because the entrance angle of the axially different position air-flow in fan inside is different, therefore
Identical inlet angle is difficult to ensure that blade with the angle of outlet, and air intake is smooth everywhere, and trailing edge in blade after air-flow air-out forms de-
Fall whirlpool so that the noise of fan is larger, and fan performance is poor, influences Consumer's Experience.
The utility model is directed to deficiency of the prior art, there is provided a kind of forward multiple wing centrifugal fan, by by blade
Reverse and set, change the shape of blade so that inlet angle is differed blade with the angle of outlet everywhere, while changing blade contact gas
Stream comes off position with air-flow, the distribution of optimization fan airstream and effectively reduces the Shedding Vortex of blade trailing edge, improves the noise of fan, carries
The performance of fan high.
The technical solution of the utility model will be clearly and completely described by specific embodiment below.Obviously,
Described embodiment is only a part of embodiment of the utility model, rather than whole embodiments.Based on the utility model
In embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of the utility model protection.
Please also refer to Fig. 1 to Fig. 6, as illustrated, a kind of forward multiple wing centrifugal fan, including wheel hub 1 and it is arranged at
Some blades 2 of circular array distribution on wheel hub 1, the angle formed between the air intake of blade 2 and wheel hub inner circle is inlet angle, leaf
The angle formed between piece outlet air end and wheel hub are cylindrical is the angle of outlet.
Blade in the utility model is torsion structure, and the air intake end face of blade and/or the center line of air-out end face are in spiral shell
Rotation linear structure, the inlet angle and/or the angle of outlet of blade is at least part of along its axis direction.
In the present embodiment, the air intake end face of blade and the center line of air-out end face helically linear structure, blade enters
Bicker and the angle of outlet are along its axis direction progressively increasing or decreasing.Wherein on the basis of the center line 3 of blade upper and lower end face, with it
Midpoint on center line is clockwise with lower surface so as to realize rotating counterclockwise for blade upper surface as centre of twist axle 4
Rotate, the torsion overall so as to realize blade.In addition, also part on blade can be realized to partly being reversed on blade
Inlet angle and the angle of outlet.
By the midpoint on the center line using vane end faces as centre of twist axle, after blade twist, upper surface center line
A point of contact is intersected at the projection of lower surface center line, the point of contact is the midpoint of upper and lower end face center line, is done respectively with the point of contact
The tangent line of upper surface center line and lower surface center line, two angles of tangent line form blade twist angles.Wherein, blade twist angle
Scope is 0-45 °.Preferably, blade twist angle be 30 °, in addition can also be 10 °, 20 °, 40 ° etc., specific torsion angle according to
Setting is needed, is not limited herein.
Wherein the position of centre of twist axle can disalignment midpoint setting, so after blade twist, upper surface center
The projection of line and lower surface center line intersects at a point of contact, the midpoint of the point of contact not center line, and the position of centre of twist axle can
Set as needed, be not limited herein.
Blade can be torsion or left and right torsion up and down, and any torsional mode is capable of achieving blade twist effect.Specifically not
It is limited.
When left and right is reversed, blade is along the torsional deflection in whole or in part of its axis direction, the air intake end face of blade and/or air-out
The center line of end face helically linear structure.
When reversing up and down, blade along thereon, the center line torsional deflection in whole or in part of lower surface, the air intake end face of blade
And/or the center line of air-out end face helically linear structure.
In the present embodiment, blade is integrated the torsion structure of machine-shaping, can be integrally formed by stamping forming mode
Go out the blade with torsion structure, after by the two ends of blade by riveting or other fixed forms be fixed on wheel hub, due to turn round
The presence of rotation structure so that inlet angle is differed blade with the angle of outlet everywhere.Under in working order, on the one hand change inlet angle
So that it is more smooth during the diverse location contact air-flow of blade axial direction, reduce kinetic energy rejection；On the other hand because the angle of outlet is different
So as to upset the Shedding Vortex of blade trailing edge, can effectively suppress noise.Using the blade of the structure type, forward multiple wing centrifugal
Vorticity has decline at the air-out tubulence energy and air intake of fan, so as to reduce fan overall noise.
Please also refer to Fig. 7 a to Figure 10 b, contrasted from blade surface tubulence energy distribution map, due to going out after leaf curling
The change of bicker has upset the vortex of blade trailing edge, reduces the distribution of the tubulence energy of blade, so that the entirety for reducing fan is made an uproar
Sound.
Drawn with the Vorticity Distribution cloud atlas comparative analysis of section B by section A, after inlet angle changes, blade contact air-flow is more
Smooth, the vorticity for distorting rear blade leading edge substantially diminishes.Due to the change of the angle of outlet, the blade trailing edge vorticity after distortion reduces,
Embodiment 2
Remaining is same as Example 1, and difference is that blade is strip arc shaped blade, and installation is provided with wheel hub
The locating slot (not shown) of blade, upside locating slot intersects at the point of contact, blade two ends difference with the projection of downside locating slot
Upside locating slot is installed on formation torsion structure in the locating slot of downside.Traditional technique can be also used in machine-shaping blade
The blade of traditional structure shape is molded, the projection of traditional blades upper and lower end face overlaps, by the difference in upper lower hub in the application
Position sets locating slot, after blade is installed into locating slot, because the position of locating slot is different, can cause that blade produces one naturally
Fixed torsion, windup-degree can be changed by the change in location of locating slot, be not limited specifically.
The utility model discloses a kind of forward multiple wing centrifugal fan, set by by blade twist so that blade air intake
The center line of end face and/or air-out end face helically linear structure, so as to change the shape of blade so that blade inlet angle everywhere
Differed with the angle of outlet.Under in working order, on the one hand change inlet angle so that blade axial direction diverse location contact air-flow
When it is more smooth, reduce kinetic energy rejection；On the other hand due to the different Shedding Vortexes so as to upset blade trailing edge of the angle of outlet, can
Effectively suppress noise.Using the blade of the structure type, vorticity is equal at the air-out tubulence energy and air intake of forward multiple wing centrifugal fan
There is decline, so as to reduce fan overall noise.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.Various modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case where spirit or scope of the present utility model are not departed from.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (9)
1. a kind of forward multiple wing centrifugal fan, including wheel hub and some blades of the distribution of circular array on wheel hub are arranged at,
The angle formed between blade air intake and wheel hub inner circle is inlet angle, blade outlet air end and wheel hub it is cylindrical between the angle that is formed be
Bicker, it is characterised in that the blade is torsion structure, and the inlet angle and/or the angle of outlet of blade are along its axis direction at least portion
Point.
2. forward multiple wing centrifugal fan as claimed in claim 1, it is characterised in that the air intake end face of the blade and/or go out
The center line of wind end face helically linear structure.
3. forward multiple wing centrifugal fan as claimed in claim 1, it is characterised in that at least inlet angle of blade and/or outlet
Angle is along its axis direction progressively increasing or decreasing.
4. forward multiple wing centrifugal fan as claimed in claim 1, it is characterised in that the blade to reverse or left and right is turned round up and down
Turn.
5. forward multiple wing centrifugal fan as claimed in claim 4, it is characterised in that the blade along its axis direction it is overall or
Part torsional deflection, the air intake end face of the blade and/or the center line of air-out end face helically linear structure.
6. forward multiple wing centrifugal fan as claimed in claim 4, it is characterised in that the blade along thereon, in lower surface
The torsional deflection in whole or in part of heart line, the air intake end face of the blade and/or the center line of air-out end face helically linear structure.
7. forward multiple wing centrifugal fan as claimed in claim 6, it is characterised in that after blade twist, upper surface center line with
The projection of lower surface center line intersects at a point of contact, and cutting for upper surface center line and lower surface center line is done respectively with the point of contact
Line, two angles of tangent line form blade twist angle, and the blade twist angle is 0-45 °.
8. forward multiple wing centrifugal fan as claimed in claim 7, it is characterised in that the blade is strip arc shaped blade,
The locating slot for installing blade is provided with the wheel hub, upside locating slot intersects at the point of contact with the projection of downside locating slot,
Blade two ends are respectively arranged in the upside locating slot with formation torsion structure in the locating slot of downside.
9. forward multiple wing centrifugal fan as claimed in claim 1, it is characterised in that the blade is integrated the torsion of machine-shaping
Rotation structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621069021.XU CN206246413U (en) | 2016-09-21 | 2016-09-21 | A kind of forward multiple wing centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621069021.XU CN206246413U (en) | 2016-09-21 | 2016-09-21 | A kind of forward multiple wing centrifugal fan |
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| Publication Number | Publication Date |
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| CN206246413U true CN206246413U (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621069021.XU Active CN206246413U (en) | 2016-09-21 | 2016-09-21 | A kind of forward multiple wing centrifugal fan |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131324A (en) * | 2018-01-15 | 2018-06-08 | 汕头大学 | A kind of small-sized multi-wing centrifugal exhaust fan of highly effective low noise and impeller |
| CN108644997A (en) * | 2018-06-13 | 2018-10-12 | 广东美的制冷设备有限公司 | Wind guiding component, air conditioner room unit and the air conditioner of air conditioner |
| CN110360150A (en) * | 2019-07-08 | 2019-10-22 | 珠海格力电器股份有限公司 | Wind wheel, centrifugal fan and air conditioner indoor unit |
| CN111734675A (en) * | 2020-06-16 | 2020-10-02 | 泛仕达机电股份有限公司 | Backward centrifugal wind wheel and centrifugal fan |
-
2016
- 2016-09-21 CN CN201621069021.XU patent/CN206246413U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131324A (en) * | 2018-01-15 | 2018-06-08 | 汕头大学 | A kind of small-sized multi-wing centrifugal exhaust fan of highly effective low noise and impeller |
| CN108644997A (en) * | 2018-06-13 | 2018-10-12 | 广东美的制冷设备有限公司 | Wind guiding component, air conditioner room unit and the air conditioner of air conditioner |
| CN108644997B (en) * | 2018-06-13 | 2024-01-12 | 广东美的制冷设备有限公司 | Air guide assembly of air conditioner, indoor unit of air conditioner and air conditioner |
| CN110360150A (en) * | 2019-07-08 | 2019-10-22 | 珠海格力电器股份有限公司 | Wind wheel, centrifugal fan and air conditioner indoor unit |
| CN110360150B (en) * | 2019-07-08 | 2020-08-21 | 珠海格力电器股份有限公司 | Wind wheel, centrifugal fan and air conditioner indoor unit |
| CN111734675A (en) * | 2020-06-16 | 2020-10-02 | 泛仕达机电股份有限公司 | Backward centrifugal wind wheel and centrifugal fan |
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