CN110043511A - Wind wheel and its blade - Google Patents
Wind wheel and its blade Download PDFInfo
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- CN110043511A CN110043511A CN201910340928.7A CN201910340928A CN110043511A CN 110043511 A CN110043511 A CN 110043511A CN 201910340928 A CN201910340928 A CN 201910340928A CN 110043511 A CN110043511 A CN 110043511A
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- blade
- wind wheel
- longitudinal direction
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- 241000157234 Asio otus Species 0.000 description 6
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- 238000011160 research Methods 0.000 description 5
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
-
- 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
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- 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
- 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
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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
- F04D29/66—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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a kind of wind wheel and its blades, the blade extends along the longitudinal direction, and the blade has the windward side positioned at the leeward of upside and positioned at downside, the windward side includes lower convex surface and upper recess surface, the lower convex surface is at least part downwardly toward the shape far from the leeward protrusion, the shape that the upper recess surface is recessed at least part upwardly toward the leeward, and the upper recess surface is located at the rear side on the lower convex surface.The blade of wind wheel according to an embodiment of the present invention has noise reduction effect well.
Description
Technical field
The present invention relates to technical field of power equipment, in particular to the blade of a kind of wind wheel and application have the wind of the blade
Wheel.
Background technique
Window air conditioner because its structure is simple, lower production costs, it is cheap, easy for installation the advantages that, in North America, east
South Asia and the ground such as China Hong Kong and Taiwan occupation rate of market with higher.While air-conditioning appearance, performance improvement, noise
Problem more cause user, enterprise and scientific research personnel's note that thus carry out window air conditioner noise reduction technology research have ten
Divide important practical application value.
Summary of the invention
First aspect present invention is to propose a kind of blade of wind wheel have noise reduction effect well.
Second aspect of the present invention is the wind wheel for proposing to have the blade.
The blade of wind wheel according to an embodiment of the present invention, the blade extend along the longitudinal direction, and the blade has position
Leeward in upside and the windward side positioned at downside, the windward side include lower convex surface and upper recess surface, and the lower convex surface is in extremely
Few a part is downwardly toward the shape far from the leeward protrusion, and the upper recess surface is at least part upwardly toward described leeward
The shape of face recess, and the upper recess surface is located at the rear side on the lower convex surface.
The blade of wind wheel according to an embodiment of the present invention has noise reduction effect well.
In addition, the blade of wind wheel according to the above embodiment of the present invention, can also have the following additional technical features:
In some embodiments, the size L1 of the lower convex surface along the longitudinal direction is less than the ruler of the upper recess surface along the longitudinal direction
Very little L2.
In some embodiments, L1:L2 is in the range of 1:9 to 1:5.
In some embodiments, L1:L2 is in the range of 1:8 to 1:6.
In some embodiments, convex height H1 is less than the height H2 of the upper recess surface fovea superior under the lower convex surface.
In some embodiments, H1:H2 is in the range of 1:5 to 1:3.
In some embodiments, convex height is H1 under the lower convex surface, and the size of the windward side along the longitudinal direction is LY,
H1:LY is in the range of 0.02 to 0.03.
In some embodiments, the height of the upper recess surface fovea superior is H2, and the size of the windward side along the longitudinal direction is LY,
H2:LY is in the range of 0.08 to 0.1.
In some embodiments, the front on the top on the lower convex surface and the lower convex surface is at a distance from the longitudinal direction
L3, the back edge on the top on the lower convex surface and the lower convex surface in the longitudinal direction at a distance from be L4, L3 < L4.
In some embodiments, L3/L4 is in the range of 1/5 to 1/3.
In some embodiments, the front on the top on the lower convex surface and the lower convex surface is at a distance from the longitudinal direction
L3, the size of the windward side along the longitudinal direction are LY, and L3/LY is in the range of 0.0125 to 0.05.
In some embodiments, the front of the top of the upper recess surface and the upper recess surface is at a distance from the longitudinal direction
L5, the back edge of the top of the upper recess surface and the upper recess surface in the longitudinal direction at a distance from be L6, L5 < L6.
In some embodiments, L5/L6 is in the range of 0.7 to 0.9.
In some embodiments, the back edge of the top of the upper recess surface and the upper recess surface in the longitudinal direction at a distance from be
L6, the size of the windward side along the longitudinal direction are LY, and L6/LY is in the range of 0.45 to 0.55.
In some embodiments, the back edge on the lower convex surface and the front of the upper recess surface are along being connected；And/or it is described under it is convex
The front in face is along the front edge for extending to the windward side；And/or the back edge of the upper recess surface extends to the windward side
Back edge.
In some embodiments, the lower convex surface and the upper recess surface are cambered surface.
In some embodiments, the windward side is smooth cambered surface.
In some embodiments, at least part of the leeward is in the shape to raise upward.
In some embodiments, the leeward is the shape extended downwardly after elder generation is upward from preceding edge to back edge.
In some embodiments, the front of the top of the leeward and the leeward is at a distance from the longitudinal direction
L7, the back edge of the top of the leeward and the leeward along the longitudinal direction at a distance from be L8, L7 < L8.
In some embodiments, L7/L8 is in the range of 1/3 to 2/3.
In some embodiments, the convex maximum height H3 of the leeward and the size of the leeward in the longitudinal direction
The ratio H3/LB of LB is in the range of 0.14 to 0.16, preferably in the range of 0.153 to 0.154.
In some embodiments, the front of the windward side along with the front of the leeward along being connected；And/or it is described windward
The back edge in face is connected with the back edge of the leeward.
In some embodiments, the leeward is smooth cambered surface.
In some embodiments, the leading edge thickness of the blade is greater than the rear thickness of the blade, and the thickness of the blade
Degree is gradually reduced from leading edge to rear.
In some embodiments, the thickness of blade first increases and then decreases in the longitudinal direction.
In some embodiments, the front end of the blade has most along the position that spacing is 0.1LP to 0.2LP on the blade
Big thickness, wherein LP is the length of the blade along the longitudinal direction.
In some embodiments, along middle part, convex camber line extends the blade from leading edge to rear.
The wind wheel of embodiment according to a second aspect of the present invention, comprising: shell, the shell have air inlet and air outlet；
Blade, the blade are set on the housing, and the blade extends along from the air inlet to the direction of the air outlet, institute
Stating blade is the blade according to wind wheel above-mentioned.
In some embodiments, the blade include it is multiple, multiple spacing with blades arrangements circularize, and the blade edge
The radial of the annular extends to rear from leading edge.
In some embodiments, the blade extends from leading edge to rear along camber line.
In some embodiments, the blade extends from leading edge to rear along circular arc line.
In some embodiments, the leading edge of the blade is adjacent to the center of the annular, the up-front established angle of the blade
In the range of 20 ° to 60 °, the established angle of the rear of the blade is in the range of 80 ° to 120 °.
Detailed description of the invention
Fig. 1 and Fig. 2 is the schematic diagram of the blade of one embodiment of the invention.
Fig. 3 and Fig. 4 is the sectional view of the blade of one embodiment of the invention.
Fig. 5 is the schematic diagram of the wind wheel of one embodiment of the invention.
Fig. 6 is the cross-sectional view of the wind wheel of one embodiment of the invention.
Fig. 7 is the different middle camber line arrangement form schematic diagrames for organizing blade in other wind wheel of the invention.
Fig. 8 is blade arrangement form schematic diagram in the different other wind wheels of group of the invention.
Fig. 9 is the schematic diagram of blade in one embodiment of the invention.
Specific embodiment
The noise of window air conditioner is mainly made of mechanical noise, electromagnetic noise, aerodynamic noise, wherein aerodynamic noise accounting
Maximum, therefore the noise of ducting system becomes the primary study work of air-conditioning noise reduction.Ducting system is mainly by spiral case and impeller sets
At, it is less for the Research of Noise Reduction of window air conditioner ducting system merely, but have more for the noise problem of centrifugal blower
Extensive research.Impeller is the rotary part in blower, plays an important role to the energy transmission of blower, is also important noise
Source.
Asio otus can be achieved under the flying speed of 8m/s it is noiseless flutter food, this speed also corresponds to the import of general fan airflow
Speed, extract aeroperformance well and low-noise characteristic 40% section aerofoil profile, can be applied to blower blade profile improvement in.
The present invention extracts, and there is the Asio otus wing 40% of low noise characteristic to open up to aerofoil profile, with the centrifugation of certain model window air conditioner
Blower is research object, using the application mode of camber line in the thriving type difference of method analysis Fang Owl of numerical simulation to fan noise
The influence of performance, and by the validity of laboratory facilities verifying mathematical calculation model and optimization design, its noise reduction effect is carried out
Visual analyzing.
Wherein, it 40% opens up to aerofoil profile and refers to Asio otus wing along 40% position section of spanwise (wing prolonging direction)
Aerofoil profile shows the performance of high-efficient low-noise；Similarly 30% equal exhibition can also be used to aerofoil profile.
Certainly, blade, the wind wheel etc. in the present invention are not limited to be used in window air conditioner.
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Such as Fig. 1, the blade 1 of wind wheel according to an embodiment of the present invention, blade 1 extends along the longitudinal direction, and blade 1 has position
Leeward 101 in upside and the windward side 104 positioned at downside, windward side 104 include lower convex surface 102 and upper recess surface 103, under it is convex
Face 102 at least part downwardly toward the shape far from the protrusion of leeward 101, upper recess surface 103 at least part upwardly toward
The shape that leeward 101 is recessed, and upper recess surface 103 is located at the rear side on lower convex surface 102.
The blade 1 of wind wheel according to an embodiment of the present invention, when air-flow is by windward side 104, it will first pass around down convex
Then face 102 can be effectively reduced making an uproar for air-flow by the guidance on upper convex surface and lower convex surface 102 using upper recess surface 103
Sound.
It should be noted that it is as reference with blade sheet specifically, to connect windward that the fovea superior is convex under
The front edge in face and the face of back edge are reference plane, and the downwardly projecting reference plane is convex under being, and faces upward relative to the reference
Recess is fovea superior.Specifically, reference plane defines as follows, take the front of windward side along it is upper a bit,
Point corresponding to this point is found on the back edge of windward side, connects that the two dots are into a line, chooses the front edge of windward side
On all the points make line, these lines, which are combined, is formed the reference plane.
Certainly, this is only one embodiment of the present of invention, that is to say, that airflow direction, guidance air-flow in the present invention
Face can be other forms, for example, air-flow first passes through after upper recess surface through lower convex surface.
In addition, it should also be noted that, the directions such as up, down, left, right, before and after in the present invention are carried out based on attached drawing
Description, the use different for blade, pose pattern, these directions will change accordingly.In addition, following height etc. is retouched
It states, is also based on for the direction in attached drawing, its purpose is to simplify statement to understand to facilitate, should not be understood as to this hair
The limitation of bright protection scope.
In the embodiment show in figure 1, the front edge of windward side and back edge are parallel to each other, then reference plane is formed as one
Plane, and when for the front edge of windward side and not parallel back edge, reference plane can not be plane.For example, before windward side
Edge and back edge are mutually inclined；Or windward side front edge and at least one of back edge be arc shape.
In some embodiments of the invention, the size L1 of lower convex surface 102 along the longitudinal direction is less than upper recess surface 103 along front and back
The size L2 in direction.The guide functions that lower convex surface 102 can be improved, to reduce noise.
By taking air-flow first passes through lower convex surface 102 as an example, under the guiding function on lower convex surface 102, it can preferably will draw gas
It is directed on blade, so that the transfer efficiency of blade is improved, furthermore, it is possible to avoid turbulent flow.
In addition, L1 can also be set greater than to L2 in the present invention, noise can be equally reduced.
Further, the ratio of L1 and L2 can have different forms, such as L1:L2 is in the range of 1:9 to 1:5.
Preferably, L1:L2 is in the range of 1:8 to 1:6.
In some embodiments of the invention, height H1 convex under lower convex surface 102 is less than the height of 103 fovea superior of upper recess surface
H2.It can be entered in upper recess surface 103 after air-flow is by the guidance of lower convex surface 102, since the depth of upper recess surface 103 is bigger,
Air-flow will be thrown away by upper recess surface 103, the noise that not only can reduce or avoid the unstable circulation due to air-flow to generate, and
And air-flow can also be facilitated to send out, so that air-flow can with fast and stable be sent out, improve the efficiency of air-supply.
Further, H1:H2 is in the range of 1:5 to 1:3.
In some embodiments of the invention, height convex under lower convex surface 102 is H1, and windward side 104 is along the longitudinal direction
Having a size of LY, H1:LY is in the range of 0.02 to 0.03.
Further, the height of 103 fovea superior of upper recess surface is H2, and the size of windward side 104 along the longitudinal direction is LY, H2:LY
In the range of 0.08 to 0.1.
In some embodiments of the invention, the front on the top on lower convex surface 102 and lower convex surface 102 is along in the longitudinal direction
Distance be L3, the back edge on the top on lower convex surface 102 and lower convex surface 102 in the longitudinal direction at a distance from for L4, L3 < L4.
Preferably, L3/L4 is in the range of 1/5 to 1/3.
In some embodiments of the invention, the front on the top on lower convex surface 102 and lower convex surface 102 is along in the longitudinal direction
Distance be L3, the size of windward side 104 along the longitudinal direction be LY, L3/LY is in the range of 0.0125 to 0.05.
In some embodiments of the invention, the top of upper recess surface 103 and the front of upper recess surface 103 are along in the longitudinal direction
Distance be L5, the back edge of the top of upper recess surface 103 and upper recess surface 103 in the longitudinal direction at a distance from for L6, L5 < L6.
Further, L5/L6 is in the range of 0.7 to 0.9.
In some embodiments of the invention, the back edge of the top of upper recess surface 103 and upper recess surface 103 is in the longitudinal direction
Distance be L6, the size of windward side 104 along the longitudinal direction be LY, L6/LY is in the range of 0.45 to 0.55.
In some embodiments of the invention, the back edge on lower convex surface 102 and the front of upper recess surface 103 are along being connected.Into one
The convenient guidance to air-flow in step ground.
In addition, can also be connected by the face of plane, curved surface or other forms between lower convex surface 102 and upper recess surface 103
Come.
Further, the front on lower convex surface 102 is along the front edge for extending to windward side 104.Further, upper recess surface
103 back edge extends to the back edge of windward side 104.Further improve the guidance effect to air-flow.
Preferably, lower convex surface 102 and upper recess surface 103 are cambered surface.In addition, the lower convex surface 102 in the present invention, concave surface
103 can also be other forms, such as have multiple planes to be formed by connecting.
Advantageously, windward side 104 is smooth cambered surface.That is, being smooth transition, example everywhere on windward side 104
Such as, the mode of settable fillet is seamlessly transitted.
In some embodiments of the invention, at least part of leeward 101 is in the shape to raise upward.Leeward
It can play the role of guiding air-flow.
Further, the shape that leeward 101 extends downwardly after upward from preceding edge to back edge for elder generation.That is,
Leeward does not have the shape to rise and fall, only single plane, in other words, connects the equal position of straight line of any two points on leeward
In the inside (downside) of leeward.
Advantageously, the front of the top of leeward 101 and leeward 101 is L7 at a distance from the longitudinal direction, leeward
The back edge of the top in face 101 and leeward 101 along the longitudinal direction at a distance from be L8, L7 < L8.
Further, L7/L8 is in the range of 1/3 to 2/3.
Advantageously, the ratio of the convex maximum height H3 of leeward 101 and the size LB of leeward 101 in the longitudinal direction
H3/LB is in the range of 0.14 to 0.16.
In attached drawing 1 of the invention, due to leeward front along with the front of windward side along being connected, the back of leeward
Along being connected with the back edge of windward side, therefore, the size LB of leeward along the longitudinal direction and the size of windward side along the longitudinal direction
LY is identical.
Preferably, H3/LB is 0.153 to 0.154 in the range of.
In some embodiments of the invention, the front of windward side 104 along with the front of leeward 101 along being connected
Further, the back edge of the back edge with leeward 101 of windward side 104 is connected.
Advantageously, leeward 101 is smooth cambered surface.
Preferably, the leading edge thickness of blade 1 be greater than blade 1 rear thickness, and the thickness of blade 1 from leading edge to rear by
It is decrescence small.
In some embodiments of the invention, the thickness of blade 1 first increases and then decreases in the longitudinal direction.
Further, the front end of 1 blade 1 of blade has maximum gauge along the position that spacing is 0.1LP to 0.2LP,
Middle LP is the length of blade 1 along the longitudinal direction.
In some embodiments of the invention, along middle part, convex camber line extends blade 1 from leading edge to rear.
In addition, the present invention also provides another blades.
Such as Fig. 2, the blade 1 of wind wheel according to an embodiment of the present invention, blade 1 extends along the longitudinal direction, and blade 1 has position
Leeward 101 in upside and the windward side 104 positioned at downside, lower surface molded line 104 ' include lower convex line 102 ' and upper concave
103 ', specifically, to intercept blade perpendicular to the plane of left and right directions, wherein windward side forms lower surface shape on section
At leeward forms upper surface molded line on section.Wherein, lower convex line 102 ' is at least part downwardly toward far from upper surface type
The shape of 101 ' protrusion of line, the shape that upper concave 103 ' is recessed at least part upwardly toward upper surface molded line 101 ', and on
Concave 103 ' is located at the rear side of lower convex line 102 '.
The blade 1 of wind wheel according to an embodiment of the present invention, can be effectively reduced the noise of air-flow.
It should be noted that it is as reference with blade sheet specifically, to connect following table that the fovea superior is convex under
The forward terminal of face molded line and the face of aft terminal are reference plane, and the downwardly projecting reference plane is convex under being, and relative to the reference plane
Recess is fovea superior upwards.Specifically, reference plane defines as follows, on the forward terminal for removing surface molded line
A bit, point corresponding to this point is found on the aft terminal of lower surface molded line, it is into a line to connect the two dots, chooses following table
All the points on the forward terminal of face molded line make line, these lines, which are combined, is formed the reference plane.
In addition, it is necessary to illustrate, in the blade of embodiment description in front, leaf is intercepted using perpendicular to left and right directions
Piece can obtain the structures such as upper surface molded line, the lower surface molded line in the application, but be not meant as the blade in the application
Identical as the blade in preceding embodiment, the upper surface molded line in the application can obtain different realities from the combination of lower surface molded line
Apply the blade of example.
For example, blade is arranged to be made of the multiple portions being staggeredly arranged, the section that can be each part has
Upper surface molded line and lower surface molded line in the present invention are also possible to have on the only section of some heretofore described
Upper surface molded line and lower surface molded line.
In some embodiments of the invention, the size L1 ' of lower convex line 102 ' along the longitudinal direction is less than upper 103 ' edge of concave
Size L2 ' in the front-back direction.The guide functions of lower convex line 102 ' can be improved, to reduce noise.
Further, L1 ': L2 ' in the range of 1:9 to 1:5.
Preferably, L1 ': L2 ' in the range of 1:8 to 1:6.
In some embodiments of the invention, height H1 ' convex under lower convex line 102 ' is less than the height of upper 103 ' fovea superior of concave
Spend H2 '.It can enter in concave 103 ', after air-flow is by the guidance of lower convex line 102 ' due to the depth of upper concave 103 '
Bigger, air-flow will be thrown away by upper concave 103 ', not only can reduce or avoid the unstable circulation due to air-flow to generate
Noise, so that air-flow can with fast and stable be sent out, improves the efficiency of air-supply moreover, it is also possible to which air-flow is facilitated to send out.
Further, H1 ': H2 ' in the range of 1:5 to 1:3.
In some embodiments of the invention, height convex under lower convex line 102 ' is H1 ', and lower surface molded line 104 ' is along front and back
The size in direction is LY ', and H1 ': LY ' in the range of 0.02 to 0.03.
Further, the height of upper 103 ' fovea superior of concave is H2 ', and the size of lower surface molded line 104 ' along the longitudinal direction is
LY ', H2 ': LY ' is in the range of 0.08 to 0.1.
In some embodiments of the invention, the forward terminal of the top of lower convex line 102 ' and lower convex line 102 ' is in front-rear direction
On distance be L3 ', the aft terminal of the top of lower convex line 102 ' and lower convex line 102 ' in the longitudinal direction at a distance from for L4 ', L3 '
< L4 '.
Preferably, L3 '/L4 ' is in the range of 1/5 to 1/3.
In some embodiments of the invention, the forward terminal of the top of lower convex line 102 ' and lower convex line 102 ' is in front-rear direction
On distance be L3 ', the size of lower surface molded line 104 ' along the longitudinal direction be LY ', range of the L3 '/LY ' 0.0125 to 0.05
It is interior.
In some embodiments of the invention, the forward terminal of the top of upper concave 103 ' and upper concave 103 ' is in front-rear direction
On distance be L5 ', the aft terminal of the top of upper concave 103 ' and upper concave 103 ' in the longitudinal direction at a distance from for L6 ', L5 '
< L6 '.
Further, L5 '/L6 ' is in the range of 0.7 to 0.9.
In some embodiments of the invention, the aft terminal of the top of upper concave 103 ' and upper concave 103 ' is in front-rear direction
On distance be L6 ', the size of lower surface molded line 104 ' along the longitudinal direction be LY ', range of the L6 '/LY ' 0.45 to 0.55
It is interior.
In some embodiments of the invention, the aft terminal of lower convex line 102 ' is connected with the forward terminal of upper concave 103 '.
Further, the forward terminal of lower convex line 102 ' extends to the forward terminal of lower surface molded line 104 '.
Further, the aft terminal of upper concave 103 ' extends to the aft terminal of lower surface molded line 104 '.
Preferably, lower convex line 102 ' and upper concave 103 ' are cambered surface.
Advantageously, lower surface molded line 104 ' is smooth cambered surface.
In some embodiments of the invention, at least part of upper surface molded line 101 ' is in the shape to raise upward.
Further, the shape that upper surface molded line 101 ' extends downwardly after upward from forward terminal to aft terminal for elder generation.
Advantageously, the forward terminal of the top of upper surface molded line 101 ' and upper surface molded line 101 ' in the longitudinal direction at a distance from
For L7 ', the aft terminal of the top of upper surface molded line 101 ' and upper surface molded line 101 ' along the longitudinal direction at a distance from be L8 ', L7 ' <
L8’。
Further, L7 '/L8 ' is in the range of 1/3 to 2/3.
Advantageously, the convex maximum height H3 ' of upper surface molded line 101 ' and upper surface molded line 101 ' be in the longitudinal direction
Ratio H3 '/LB ' of size LB ' is in the range of 0.14 to 0.16.
In attached drawing 2 of the invention, since the forward terminal of upper surface molded line is connected with the forward terminal of lower surface molded line, upper table
The aft terminal of face molded line is connected with the aft terminal of lower surface molded line, and therefore, the size LB ' of upper surface molded line along the longitudinal direction is under
The size LY ' of surface molded line along the longitudinal direction is identical.
Preferably, H3 '/LB ' is 0.153 to 0.154 in the range of.
In some embodiments of the invention, the forward terminal of the forward terminal of lower surface molded line 104 ' and upper surface molded line 101 '
It is connected
Further, the aft terminal of lower surface molded line 104 ' is connected with the aft terminal of upper surface molded line 101 '.
Advantageously, upper surface molded line 101 ' is smooth cambered surface.
Preferably, the leading edge thickness of blade 1 be greater than blade 1 rear thickness, and the thickness of blade 1 from leading edge to rear by
It is decrescence small.
In some embodiments of the invention, the thickness of blade 1 first increases and then decreases in the longitudinal direction.
Further, the front end of 1 blade 1 of blade has maximum gauge along the position that spacing is 0.1LP to 0.2LP,
Middle LP is the length of blade 1 along the longitudinal direction.
In some embodiments of the invention, along middle part, convex camber line extends blade 1 from leading edge to rear.
In addition, the present invention also provides the blades of the wind wheel of another embodiment.It should be noted that provided by the invention
The blade of different embodiments can be combined together.
The blade of wind wheel according to an embodiment of the present invention, blade extend along the longitudinal direction, and blade has positioned at upside
Leeward and windward side positioned at downside, with perpendicular to the plane of left and right directions intercept the windward side formed lower surface molded line,
It intercepts the leeward and forms upper surface molded line, using the forward terminal of the lower surface molded line as origin, with the lower surface molded line
The line of two-end-point establish coordinate system as x-axis, using up and down direction as Y-axis, the lower surface molded line meets:
Wherein, ZcFor the middle arc length coordinate of blade, ZlowerFor the Y-coordinate value of lower surface molded line, ZtIt is vertically square for blade
To distribution of the thickness in x-axis, c is the length of lower surface molded line in left-right direction, and x is x-axis coordinate, η=x/c, Zc(max)For
The maximum Y axis coordinate value of middle camber line, SnFor the multinomial coefficient for describing blade, Zt(max)For the maximum gauge of blade, AnFor description
The multinomial coefficient of blade.
The blade of wind wheel according to an embodiment of the present invention, the blade design of Cai Yong Owl aerofoil profile, it is ensured that or improve and give
In the case where wind effect, noise is reduced.
According to one embodiment of present invention, SnAnd AnIt is the multinomial coefficient being fitted by least square method.
Further, S1=3.9362, S2=-0.7705, S3=0.8485, A1=-29.4861, A2=66.4565, A3
=-59.806, A4=19.0439.
Preferably, Zc(max)And Zt(max)Meet:
Wherein, [0,1] ξ ∈
Advantageously, ξ=0.4.
According to above-mentioned various, 40% section aerofoil profile of Asio otus wing is extracted, aerofoil profile design parameter is as shown in table 1, wherein+y/
C is blade upper surface molded line relative coordinate, and-y/c is blade lower surface molded line relative coordinate.Fig. 9 is drawn according to aerofoil profile data point
The thriving type molded line of Fang Owl processed.
Further, the upper surface molded line ZupperMeet:
Wherein, ZupperFor the Y-coordinate value of upper surface molded line.
Further, the forward terminal of the windward side is connected with the forward terminal of the leeward, the rear end of the windward side
Point is connected with the aft terminal of the leeward.
The 1 thriving shape parameter of Fang Owl of table
In addition, the present invention also provides a kind of wind wheels 100, comprising: shell 2 and blade 1, shell 2 have 201 He of air inlet
Air outlet 202, blade is located on shell, and blade extends along the direction from air inlet to air outlet, and blade is according to above-mentioned
The blade of wind wheel.
Further, blade includes multiple, and multiple spacing with blades arrangements circularize, and blade is along the radial from leading edge of annular
Extend to rear.
Advantageously, blade extends from leading edge to rear along camber line.Further, blade prolongs from leading edge to rear along circular arc line
It stretches.
Preferably, the center of the leading edge adjacent rings of blade, the up-front established angle of blade in the range of 20 ° to 60 °,
The established angle of the rear of blade is in the range of 80 ° to 120 °.
In order to clearly illustrate the advantage of the wind wheel with blade of the present invention, the survey to wind wheel is described in detail in the present invention
Examination mode.
Blade of the invention improves the air-supply effect of wind wheel, the present invention is in following test wrapper for the noise of reduction wind wheel
Wind wheel of the invention is tested under border.
1 numerical value calculates
1.1 physical model
By taking window air conditioner room as an example, window air conditioner indoor ducting system is mainly made of spiral case and impeller.
According to ducting system structure to fluid mass carry out three-dimensional modeling, fluid mass be broadly divided into entrance region, impeller area,
Spiral case area (inlet and outlet each extend over 0.5,1 times of impeller outer diameter) carries out unstrctured grid division using ICEM, before impeller blade
Trailing edge and volute tongue region carry out local mesh reflnement, under the premise of the turbulence model of selection nearly wall equation, so that net region
Y+ value be in 30~100 between.For the accuracy and validity for guaranteeing numerical value calculating, independence verifying is carried out to grid, most
Whole entrance region grid 790,000, impeller region grid 1,530,000, spiral case area grid 1,720,000 amount to 4,040,000.
1.2 Flow Field Calculation
1.2.1 permanent calculating
Numerical value calculating is carried out to its interior flow field using business software Fluent, governing equation is the side Navier-Stokes
Journey, turbulent flow, which calculates, uses Realizable k-epsilon model, and nearly wall equation uses Standard law of wall, pressure x velocity coupling
Using SIMPLE algorithm, pressure discrete scheme uses PRESTO！Format, the equation of momentum, energy equation and turbulent dissipation equation are equal
Using Second-order Up-wind format, calculates convergence residual error and be set as 10-4.It is 0Pa that inlet boundary, which gives stagnation pressure, and constant static-pressure 0Pa is given in outlet
Calculate maximum quantity of wind.Spiral case area, entrance region are set as stagnant zone, and impeller area is set as rotary area, using Frame
Motion model sets rotary area revolving speed as 1500rpm.
1.2.2 unsteady computation
Unsteady computation is carried out using the convergence solution of permanent calculating as initial value, time term selects second order implied format, leaf
Wheel area is that rotary area uses Mesh Motion model instead, and the time step of unsteady computation is determined by following formula:
In formula: K is the greatest iteration step number in each time step, takes K=30；N is wheel speed, n=1500rpm；Z
For impeller blade number, Z=11.
According to calculating, time step is taken as 1.21 × 10 during unsteady computation of the present invention-4S, impeller rotate 5 weeks, prison
There is apparent cyclically-varying in the calculated result for controlling variable, shows that stream has reached steady flow condition in blower.
1.2.3 noise calculation
Unsteady computation is obtained into steady flow condition as the input condition of FW-H acoustic equation, and noise source and reception are set
Point, then carry out the transient state that impeller rotates 5 weeks and calculate.Due to using Integral Solution to count far-field noise in Fluent software
It calculates, does not need to establish additional acoustic mesh outside stream field, so noise source is set as snail when noise source and receiving point is arranged
Shell and impeller wall surface, and according to test as defined in window air conditioner indoor in GBT 7725-2004 " room air conditioner "
Point setting noise Rx point, to be compared with experiment, be set as according to the final receiving point of coordinate system (- 40.32mm,
8.01mm,1110.6mm)。
After the completion of sound field calculates, the spectrogram of noise calculation can be obtained by quick Fourier transformation.Wherein blade is logical
Overfrequency may be calculated as:
In formula: I is harmonic wave serial number (being fundamental frequency when I=1).It is 275Hz, wave by the blower fundamental frequency that formula (8) is calculated
A length of 1.2364m.Since wavelength is much larger than the characteristic size of blower, in noise calculation between spiral case and impeller noise it is anti-
It penetrates, diffraction and scattering process can be ignored.
2 experimental tests
The test of 2.1 aeroperformances
Aeroperformance test according to " GB/T1236-2000 industrial ventilation machine is made a service test with standardization air duct " into
Row, using Type B experimental rig, system mainly by test blower, accessory fan, nozzle, temperature sensor, differential pressure transmitter and
Data collection system composition.By above-mentioned apparatus and instrument, the nozzle diameter for being suitble to test is chosen, it is final through data collection system
Obtain compressor flow.The components such as removal outlet grid, basket strainer, evaporator, only retain fan section, the purpose is to just in test
Compared with being calculated with numerical value.
2.2 noise testing
Noise testing carries out in professional semi-anechoic room, laboratory background noise 17.0dB, and test uses 4189 type of B&K
Sound pressure sensor measures acoustic pressure and is sent to LMS SCADAS Mobile SCM01 data by 2669 type preamplifier of B&K
Acquisition system, acquisition signal are analyzed software by LMS Test.Xpress 7A vibration noise and are handled, used before experiment
4231 type acoustic calibration device of B&K calibrates sound pressure sensor, is tested after stable.Experimental provision meets GBT
7725-2004 " room air conditioner " regulation, test noise measuring point is measured according to standard, i.e., apart from air-conditioning front surface
1m and identical with the receiving point of noise calculation apart from ground 1m.
2.3 experimental tests and numerical simulation contrast verification
Table 2 gives the comparing result of experimental test and numerical simulation.Fan test is to remove outlet lattice in air conditioner
It is carried out in the case where grid, basket strainer, evaporator, the skies such as discovery outlet cells, basket strainer, evaporator is tested by pre-stage test
Component is adjusted, there is certain influence on air quantity, it is little to influence of noise, therefore air-conditioning noise reduction can be directed to emphatically the drop of fan noise
It is low.Numerical simulation is carried out to simple blower, can simplify computation model in this way, saves and calculates the time, while it is pre- to can reach noise
The purpose of survey.The test and numerical result, error for comparing blower show that calculation method is reliable, Ke Yizhun within 5%
The aeroperformance and noise of true simulates blower fan.
The comparing result of table 2 experimental test and numerical simulation.
The application of 3 Fang Owl wing blades
40% section aerofoil profile of Asio otus wing there are its distinctive middle camber line, therefore aerofoil profile in the improvement of blower blade profile just
There are a variety of application modes, can be distributed according to camber line in conventional single circular arc, it can also be according to its own airfoil mean line
It is distributed.The present invention is using extracting the thriving type of Fang Owl, according in camber line in the middle camber line of prototype blade, single circular arc, aerofoil profile
Camber line carries out the arrangement of the thriving type of Fang Owl, and because blade imports and exports established angle with the fixed relationship of middle camber line, by arc in aerofoil profile
Line is distributed as guaranteeing its original middle camber line molded line, and the stagger angle and exit installation angle for ensuring blade respectively are the same as prototype blade
It is identical, therefore totally four kinds of different aerofoil profile arrangements.Four kinds of different middle camber line distributions are as shown in fig. 7, install four Zhong Fang Owl additional
The blade profile of thriving type as shown in figure 8, the relevant parameter of impeller is shown in Table 3, wherein group 1,2,3,4 distinguish the thriving type of Shi Fang Owl according to
Camber line in prototype, camber line, the identical airfoil mean line of stagger angle, the identical airfoil mean line of exit installation angle in single circular arc
It is distributed.
3 prototype of table is He Fang Owl winged petiole wheel relevant parameter
The air quantity and noise of four kinds of application Fang Owl wing blade blowers are calculated separately, and using the method for numerical simulation in order to protect
The comparativity of calculated result is demonstrate,proved, four kinds of different Fang Owl wing blade blowers use identical computation model, grid dividing and calculating
Method, concrete outcome are as shown in table 4.
The calculated result of 4 prototype of table and four Zhong Fang Owl wing blade blowers
Analytical table 4 is it is found that the different application mode of the thriving type of Fang Owl generates different effects to aerodynamic performance and noise
Fruit.Using the thriving type of Fang Owl, according to vane inlet established angle, with prototype, the fan delivery of identical middle camber line distribution increases compared with prototype
13m3/ h, but noise also increases 0.4dB simultaneously；Using the thriving type of Fang Owl according to camber line and blade in camber line in prototype, single circular arc
In the case where keeping air quantity to be basically unchanged, noise has in various degree the blower of the angle of outlet identical middle camber line distribution with prototype
Reduction, wherein the thriving type of Fang Owl presses camber line partition noise in single circular arc to reduce degree maximum, compared with prototype compared to can reduce
1.7dB.It can thus be seen that the thriving type of Fang Owl is applied in centrifugal blower, it can be compared with while guaranteeing aerodynamic performance
Big degree reduces the aerodynamic noise of blower.
5 test results and Reduction Analysis
5.1 test result
On the basis of numerical simulation, verifying is compared to calculated result using the method for experimental test.Using ABS material
Material carries out palm processing to best noise reduction effect Fang Owl winged petiole wheel (group 2), i.e., the thriving type of Fang Owl is according to camber line in single circular arc
The impeller of distribution keeps material same as prototype impeller, to ignore influence of the material to fan performance and noise.
Table 5 gives the comparison result of experimental test and numerical simulation.As can be seen from Table 5, using Fang Owl wing blade
Fan test test and numerical simulation all show fan delivery noise while being basically unchanged and significantly decrease.Compared to
Experiment test, the air quantity and test measurement air quantity gap of the Owl wing blade blower of Fang as the result is shown of numerical simulation are smaller, opposite to miss
Difference is 1.7%, and the relative error of noise is 3.4%, in the range of engineering allowable error, it is believed that numerical value calculates can be with
Quantitative prediction is carried out to noise.By verification experimental verification, the use of imitative Owl wing airfoil fan can reduce fan noise 1.3dB,
Show good noise reduction effect.
The comparison result of table 5 experimental test and numerical simulation
Stream and noise analysis in 5.2
Below by taking the best thriving type application mode of noise reduction effect Fang Owl as an example, stream and noise reduction in it are analyzed compared with prototype
Mechanism.
Analysis as can be seen that prototype impeller He Fang Owl winged petiole wheel flow condition at volute outlet is good, flowing basic one
It causes, but the flowing of the draught fan impeller region with Fang Owl wing blade can preferably adhere to blade surface, is conducive to fluid flowing
Stability.Impeller region inside spiral case, imitative Owl wing aerofoil vane flowing performance is more excellent, low in suction surface compared to prototype blade
Fast region is reduced, and flow separation weakens, it is suppressed that the generation and development of vortex, macroscopic view aspect noise show as blower broadband noise
Reduction.
Fan blade is that the speed that calculates is almost the same in 275Hz, with figure by frequency, and noise is presented with frequency
Apparent periodical out, there is apparent peak value in noise at fundamental frequency and frequency multiplication, consistent with theory analysis.As can be seen from the figure
Using the blower of Fang Owl wing blade, noise profile is substantially below prototype blade blower at each frequency, at fundamental frequency and frequency multiplication
Peak value also below prototype blade blower, wherein at 275Hz, 1375Hz, 3025Hz frequency noise peak reduce respectively 1.0dB,
2.2dB, 3.7dB, final numerical result are that noise reduces 1.7dB, are shown good low using the blower of Fang Owl wing blade
Noise characteristic.
Using third-octave spectrum analysis can reaction noise source definitely spectral characteristic.With prototype blower phase
Than the blower with Fang Owl wing blade all decreases in entire band noise, it can be seen that the blower with Fang Owl wing blade
Noise reduction becomes apparent in the frequency after 600Hz, and Zhe Yu Owl class is the phenomenon that low and medium frequency section generates low noise flight
It is consistent.Blower broadband noise and discrete noise all decrease, and show that flow separation is drawn in the use of Fang Owl wing blade
Between the eddy current crack served and blade and volute tongue it is unsteady caused by rotational noise have improvement result.
Acoustic pressure pulsation hourly value directly reacts sound source region, and clearly shows that each position to the contribution margin of noise.Due to leaf
Wheel is unshrouded impeller, and collector outlet is bigger than profile ID, therefore axial admission is larger to the impact of impeller front disc end, and because
It is air-flow during axially turning radial direction, blade inlet edge is larger by gas shock, and impeller front disc end is shown as in figure
It is larger with blade inlet edge pressure pulse value, it is more to noise contribution.Prototype blade is compared He Fang Owl wing blade, it can be found that Fang Owl
The use of wing blade can mitigate the pressure fluctuation of blade inlet edge, and leading edge structure can make air-flow more smoothly turn diameter through axial
To hence into impeller channel, effectively inhibit the noise of front edge area pressure fluctuation generation.It can be seen that Fang Owl wing blade makes
With the pressure fluctuation for reducing spiral case volute tongue position, the violent region of local pressure pulsation reduces, and can weaken blade and volute tongue
Unsteady effect.
6 conclusions
The present invention extracts that aeroperformance is good and the 40% section aerofoil profile of Asio otus wing of low noise characteristic, and is applied to
The blade profile of window air conditioner centrifugal fan blade is answered in improving using the thriving type difference of technique study Fang Owl of numerical simulation
With the noise reduction effect of mode, the interior stream and de-noising mechanism of its optimum efficiency are analyzed, and has carried out verification experimental verification, obtains following knot
By:
(1) the noise reduction problem of window air conditioner essentially consists in the reduction of aerodynamic noise, is centrifuged for window air conditioner
Blower establish mathematical calculation model and calculation method can effectively simulates blower fan air quantity and noise.
In (2) four kinds of different imitative Owl wing airfoil distributions, (vane inlet established angle is same by camber line distribution in itself for aerofoil profile
Prototype is identical) fan delivery compared with prototype increase 13m3/ h, but noise also increases 0.4dB simultaneously；Aerofoil profile is by camber line, list in prototype
In circular arc in camber line, aerofoil profile itself blower of camber line (blade exit established angle is identical with prototype) remained unchanged in air quantity it is same
When, noise decreases, and the fan noise that wherein aerofoil profile is distributed by camber line in single circular arc can be reduced by verification experimental verification
1.3dB；
(3) its best noise reduction effect Fang Owl wing blade blower is analyzed, it is found that the use of airfoil fan can reduce impeller stream
Low speed separated region in road, inhibits the generation and development of vortex, and aerofoil profile leading edge structure can make air-flow more smoothly through axial direction
Turn radial, weaken the pressure fluctuation of blade inlet edge, the noise for effectively front edge area pressure fluctuation being inhibited to generate, and mitigate spiral case with
The pressure fluctuation in volute tongue region, blower broadband noise and discrete noise all decrease.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (34)
1. a kind of blade of wind wheel, which is characterized in that the blade extends along the longitudinal direction, and the blade has positioned at upside
Leeward and windward side positioned at downside, the windward side include lower convex surface and upper recess surface, the lower convex surface is at least one
Divide downwardly toward the shape far from the leeward protrusion, the upper recess surface is recessed at least part upwardly toward the leeward
Shape, and the upper recess surface is located at the rear side on the lower convex surface.
2. the blade of wind wheel according to claim 1, which is characterized in that the size L1 of the lower convex surface along the longitudinal direction is small
In the size L2 of the upper recess surface along the longitudinal direction.
3. the blade of wind wheel according to claim 2, which is characterized in that L1:L2 is in the range of 1:9 to 1:5.
4. the blade of wind wheel according to claim 3, which is characterized in that L1:L2 is in the range of 1:8 to 1:6.
5. the blade of wind wheel according to claim 1, which is characterized in that convex height H1 is less than described under the lower convex surface
The height H2 of upper recess surface fovea superior.
6. the blade of wind wheel according to claim 5, which is characterized in that H1:H2 is in the range of 1:5 to 1:3.
7. the blade of wind wheel according to claim 1, which is characterized in that convex height is H1 under the lower convex surface, described
The size of windward side along the longitudinal direction is LY, and H1:LY is in the range of 0.02 to 0.03.
8. the blade of wind wheel according to claim 1, which is characterized in that the height of the upper recess surface fovea superior is H2, described
The size of windward side along the longitudinal direction is LY, and H2:LY is in the range of 0.08 to 0.1.
9. the blade of wind wheel according to claim 1, which is characterized in that the top on the lower convex surface and the lower convex surface
Front is L3 along distance in the longitudinal direction, and the back edge on the top on the lower convex surface and the lower convex surface is in the longitudinal direction
Distance be L4, L3 < L4.
10. the blade of wind wheel according to claim 9, which is characterized in that L3/L4 is in the range of 1/5 to 1/3.
11. the blade of wind wheel according to claim 1, which is characterized in that the top on the lower convex surface and the lower convex surface
Front along distance be in the longitudinal direction L3, the size of the windward side along the longitudinal direction is LY, and L3/LY arrives 0.0125
In the range of 0.05.
12. the blade of wind wheel according to claim 1, which is characterized in that the top of the upper recess surface and the upper recess surface
Front along distance be in the longitudinal direction L5, the back edge of the top of the upper recess surface and the upper recess surface is in front-rear direction
On distance be L6, L5 < L6.
13. the blade of wind wheel according to claim 12, which is characterized in that L5/L6 is in the range of 0.7 to 0.9.
14. the blade of wind wheel according to claim 1, which is characterized in that the top of the upper recess surface and the upper recess surface
Back edge distance in the longitudinal direction be L6, the size of the windward side along the longitudinal direction is LY, and L6/LY is arrived 0.45
In the range of 0.55.
15. the blade of wind wheel described in any one of -14 according to claim 1, which is characterized in that
The back edge on the lower convex surface and the front of the upper recess surface are along being connected；And/or
The front on the lower convex surface is along the front edge for extending to the windward side；And/or
The back edge of the upper recess surface extends to the back edge of the windward side.
16. the blade of wind wheel described in any one of -14 according to claim 1, which is characterized in that the lower convex surface and it is described on
Concave surface is cambered surface.
17. the blade of wind wheel described in any one of -14 according to claim 1, which is characterized in that the windward side is smooth
Cambered surface.
18. the blade of wind wheel according to claim 1, which is characterized in that at least part of the leeward is in upward
The shape of protrusion.
19. the blade of wind wheel according to claim 18, which is characterized in that the leeward is from preceding edge to back edge
The shape extended downwardly after first upward.
20. the blade of wind wheel according to claim 18, which is characterized in that the top of the leeward and the leeward
Front along distance be in the longitudinal direction L7, the back edge of the top of the leeward and the leeward is along the longitudinal direction
Distance be L8, L7 < L8.
21. the blade of wind wheel according to claim 20, which is characterized in that L7/L8 is in the range of 1/3 to 2/3.
22. the blade of wind wheel according to claim 18, which is characterized in that the convex maximum height H3 of the leeward with
The ratio H3/LB of the size LB of the leeward in the longitudinal direction is in the range of 0.14 to 0.16.
23. the blade of wind wheel according to claim 18, which is characterized in that the convex maximum height H3 of the leeward with
The ratio H3/LB of the size LB of the leeward in the longitudinal direction is in the range of 0.153 to 0.154.
24. the blade of wind wheel described in any one of -14 and 18-23 according to claim 1, which is characterized in that
The front of the windward side along with the front of the leeward along being connected；And/or
The back edge of the windward side is connected with the back edge of the leeward.
25. the blade of wind wheel described in any one of -14 and 18-23 according to claim 1, which is characterized in that described leeward
Face is smooth cambered surface.
26. the blade of wind wheel according to claim 1, which is characterized in that the leading edge thickness of the blade is greater than the leaf
The rear thickness of piece, and the thickness of the blade is gradually reduced from leading edge to rear.
27. the blade of wind wheel according to claim 1, which is characterized in that the thickness of the blade is first in the longitudinal direction
Reduce after increase.
28. the blade of wind wheel according to claim 27, which is characterized in that the front end of the blade is between on the blade
Away from having maximum gauge for the position of 0.1LP to 0.2LP, wherein LP is the length of the blade along the longitudinal direction.
29. the blade of wind wheel according to claim 1, which is characterized in that the blade is from leading edge to rear along middle part
Convex camber line extends.
30. a kind of wind wheel characterized by comprising
Shell, the shell have air inlet and air outlet；
Blade, the blade are set on the housing, and blade edge is prolonged from the air inlet to the direction of the air outlet
It stretches, the blade is the blade of the wind wheel according to any one of claim 1-29.
31. wind wheel according to claim 30, which is characterized in that the blade includes multiple, multiple spacing with blades
Arrangement circularizes, and the blade extends to rear from leading edge along the radial of the annular.
32. wind wheel according to claim 31, which is characterized in that the blade extends from leading edge to rear along camber line.
33. wind wheel according to claim 32, which is characterized in that the blade extends from leading edge to rear along circular arc line.
34. wind wheel according to claim 31, which is characterized in that the leading edge of the blade adjacent to the center of the annular,
For the up-front established angle of the blade in the range of 20 ° to 60 °, the established angle of the rear of the blade is at 80 ° to 120 °
In range.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810477530 | 2018-05-18 | ||
| CN201820750729 | 2018-05-18 | ||
| CN2018207507294 | 2018-05-18 | ||
| CN2018104775303 | 2018-05-18 |
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| CN110043511A true CN110043511A (en) | 2019-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920584452.7U Active CN209761851U (en) | 2018-05-18 | 2019-04-25 | Wind wheel and blade thereof |
| CN201910340928.7A Pending CN110043511A (en) | 2018-05-18 | 2019-04-25 | Wind wheel and its blade |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920584452.7U Active CN209761851U (en) | 2018-05-18 | 2019-04-25 | Wind wheel and blade thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209761851U (en) * | 2018-05-18 | 2019-12-10 | 广东美的制冷设备有限公司 | Wind wheel and blade thereof |
| CN114439771A (en) * | 2022-01-24 | 2022-05-06 | 广东顺威精密塑料股份有限公司 | Become inclined formula centrifugal impeller |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165950A (en) * | 1976-09-06 | 1979-08-28 | Hitachi, Ltd. | Fan having forward-curved blades |
| JP2010236437A (en) * | 2009-03-31 | 2010-10-21 | Daikin Ind Ltd | Cross-flow fan and air conditioner provided with the same |
| CN102686887A (en) * | 2009-09-28 | 2012-09-19 | 三菱电机株式会社 | Through-flow fan, air blower, and air conditioner |
| CN107701509A (en) * | 2017-10-23 | 2018-02-16 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, air conditioner room unit and air conditioner |
| CN209761851U (en) * | 2018-05-18 | 2019-12-10 | 广东美的制冷设备有限公司 | Wind wheel and blade thereof |
-
2019
- 2019-04-25 CN CN201920584452.7U patent/CN209761851U/en active Active
- 2019-04-25 CN CN201910340928.7A patent/CN110043511A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4165950A (en) * | 1976-09-06 | 1979-08-28 | Hitachi, Ltd. | Fan having forward-curved blades |
| JP2010236437A (en) * | 2009-03-31 | 2010-10-21 | Daikin Ind Ltd | Cross-flow fan and air conditioner provided with the same |
| CN102686887A (en) * | 2009-09-28 | 2012-09-19 | 三菱电机株式会社 | Through-flow fan, air blower, and air conditioner |
| CN107701509A (en) * | 2017-10-23 | 2018-02-16 | 广东美的制冷设备有限公司 | Centrifugal wind wheel, air conditioner room unit and air conditioner |
| CN209761851U (en) * | 2018-05-18 | 2019-12-10 | 广东美的制冷设备有限公司 | Wind wheel and blade thereof |
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| CN209761851U (en) | 2019-12-10 |
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