CN207554423U - Fan - Google Patents

Abstract

The utility model discloses a kind of fans, several blades for setting gradually of circumferential direction including shaft and along shaft, the windward side of each blade is equipped with the riser of shark fin-shaped, the circumferential surface of the riser is surrounded by the first face, the second face and third face, first face along shaft circumferentially extending and be connected on the windward side of corresponding blade, the second face and third face are towards riding out arc-shaped face in front of corresponding blade.Aerodynamic principle is utilized in the fan, water conservancy diversion can be carried out to fluid by the riser that shark fin-shaped is set on the windward side of blade, reduce flow-disturbing, and lateral airflow is generated to improve fluid distrbution, reduce windage, so as to reduce the friction noise between fluid and blade, generate noise reduction.

Description

Fan

Technical field

The utility model is related to fan technology field, more particularly to a kind of fan.

Background technology

It in current conventional fan, please refers to Fig.1, generally include shaft 01 and is set gradually along the circumferential direction of shaft 01 Several blades 02, blade 02 is usually in the arc plate of tabular or single radian, and flow resistance is larger during operating, so as to make fan Larger noise is generated in operation process, noise pollution is formed to working environment.

Therefore, the noise that fan generates in operation process how is reduced, is that those skilled in the art need to solve at present The technical issues of.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of fan, and the noise generated when operating is smaller.

To achieve the above object, the utility model provides following technical solution：

A kind of fan, several blades for setting gradually of circumferential direction including shaft and along the shaft, each blade Windward side is equipped with the riser of shark fin-shaped, and the circumferential surface of the riser is surrounded by the first face, the second face and third face, first face Along the shaft circumferentially extending and be connected on the windward side of the corresponding blade, second face and the equal court in third face Arc-shaped face is rided out in front of the correspondence blade.

Preferably, the windward side of each blade arc type consistent for bending situation with the axial cross section of leeward.

Preferably, the tangent line for crossing trailing edge free end endpoint is tilted relative to axially vertical plane in 45 °.

Preferably, the blade inlet edge of the blade is followed successively by the indent that radius is 6.0mm by the shaft to free end and justifies The interior concave arc that the evagination arc section and radius that indent arc section that segmental arc, radius are 6.9mm, radius are 5.7mm are 5.3mm Section, the trailing edge of the blade are followed successively by evagination arc section, radius that radius is 10.5mm by the shaft to free end and are The indent arc section and radius of 11mm is the evagination arc section of 6.3mm, and the adjacent blade free end tip-clearance is 8.75mm。

Preferably, the thickness of the riser becomes larger from front to back.

Preferably, the riser on each blade is set close to the free end of the blade.

Preferably, the second face of each riser and third surface shape into top projection in the axial direction fall within it is corresponding described in Except blade.

Preferably, the second face of each blade is set on the front in third face, and second face is the circle that radius is 7.5mm Cambered surface, the third face are the arc surface that radius is 4.5mm.

Preferably, the blade includes the metalwork being set on windward side and is set on leeward and is coated on the metalwork On plastic parts, the riser be metalwork.

Preferably, plastic parts is integrally formed with metalwork in each blade.

Fan provided by the utility model includes shaft and several blades for setting gradually of circumferential direction along shaft, each blade Windward side be equipped with the riser of shark fin-shaped, the circumferential surface of riser surrounds by the first face, the second face and third face, and the first face is circumferentially Extend and be connected on the windward side of corresponding blade, rided out in front of the second face and third the face corresponding blade of direction arc-shaped Face.

Aerodynamic principle is utilized in the fan, can be right by the riser that shark fin-shaped is set on the windward side of blade Fluid carries out water conservancy diversion, reduces flow-disturbing, and generates lateral airflow to improve fluid distrbution, reduce windage, so as to reduce fluid and leaf Friction noise between piece generates noise reduction.

Description of the drawings

It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is the embodiment of the utility model, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to the attached drawing of offer.

Fig. 1 is the vertical view of fan of the prior art；

Fig. 2 is provided the structure diagram of fan by the utility model；

Fig. 3 provides fan vertical view by the utility model；

Fig. 4 provides fan side view by the utility model.

In Fig. 1：01- shafts, 02- blades；

In Fig. 2 to Fig. 4：1- shafts, 2- blades, 21- blade inlet edges, 22- trailing edges, 3- risers, the first faces of 31-, 32- Second face, 33- thirds face.

Specific embodiment

The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work All other embodiments obtained shall fall within the protection scope of the present invention.

The core of the utility model is to provide a kind of fan, and the noise generated when operating is smaller.

It please refers to Fig.2 to Fig. 4, Fig. 2 and the structure diagram of fan is provided by the utility model；Fig. 3 is the utility model Institute's offer fan vertical view；Fig. 4 provides fan side view by the utility model.

The utility model is provided in a kind of specific embodiment of fan, is set successively including shaft 1 and along the circumferential direction of shaft 1 Several blades 2 put.The windward side of blade 2 is equipped with the riser 3 of shark fin-shaped, and riser 3 has with the blade 2 residing for the riser 3 There is correspondence.The circumferential surface of riser 3 is surrounded by the first face 31, the second face 32 and third face 33.Circumferential direction of first face 31 along shaft 1 Extend and be connected on the windward side of corresponding blade 2.Second face 32 is rided out with third face 33 towards the front of corresponding blade 2 Arcwall face, in order to reduce windage.Wherein, for each blade 2, forward and backward orientation is consistent with the rotation direction of blade 2. In addition, axial, circumferential direction in the application, radially on the basis of the central shaft of shaft 1.

Specifically, the radian in the second face 32 and third face 33 can be configured according to actual needs, for example, each blade 2 The second face 32 can be arranged on the front in third face 33, the second face 32 is the arc surface that radius is 7.5mm, and third face 33 is half Diameter is the arc surface of 4.5mm.

When fan is run, riser 3 can carry out water conservancy diversion to fluid, to reduce flow-disturbing, and generate lateral airflow, to improve Fluid distrbution reduces windage, so as to reduce the friction noise between fluid and blade 2, generates noise reduction.

Specifically, the windward side of each blade 2 and the axial cross section of leeward can be the arc type that bending situation is consistent.Leaf The bouble-bow shape setting of piece 2 can effectively increase the front face area of blade 2, increase intake.

Further, the tangent line for crossing 22 free end endpoint of trailing edge can be in 45 ° relative to axially vertical plane It tilts.The blade inlet edge 21 of blade 2 is followed successively by the indent arc section that radius is 6.0mm by shaft 1 to free end, radius is The indent arc section that the evagination arc section and radius that indent arc section, the radius of 6.9mm is 5.7mm are 5.3mm, blade 2 The interior concave arc that trailing edge 22 is followed successively by the evagination arc section that radius is 10.5mm by shaft 1 to free end, radius is 11mm Section and the evagination arc section that radius is 6.3mm.Wherein, in the circumferential, after the radian of blade 2 should be by blade inlet edge 21 to blade Edge 22 seamlessly transits.2 free end tip-clearance of adjacent blades can be 8.75mm, to change 21 fluid distrbution of blade inlet edge, subtract Few fluid spreads toward 2 periphery of blade, avoids backflow phenomenon appearance, improves vortex and flow-disturbing phenomenon, reaching noise reduction.

Specifically, the thickness of riser 3 can become larger from front to back.The forepart thickness of riser 3 is set as relatively Small value is conducive to reduce the resistance that riser 3 is subject in operational process.

Specifically, the riser 3 on each blade 2 can be set close to the free end of the blade 2, for example, riser 3 and corresponding leaf The free end end face spacing of piece 2 can be only 2.65mm, and the spacing between riser 3 and shaft 1 is much larger than the value, to protect Ensure maximum quantity of wind as far as possible while demonstrate,proving noise reduction.

Specifically, the projection of the top that the second face 32 of each riser 3 is formed with third face 33 in the axial direction can be fallen within pair It answers except blade 2, to ensure the air quantity of fan.

Specifically, blade 2 can include the metalwork being set on windward side and be set on leeward and be coated in blade 2 Plastic parts on metalwork, riser are metalwork.Only has blade 2 made of plastic cement in compared with the prior art, in the present embodiment Blade 2 in, plastic parts can reduce the overall weight of blade 2, and blade 2 can be ensured by being arranged on the metalwork above plastic parts Surface is smooth, can reduce and rub between 2 surface of fluid and blade, further reduce noise, meanwhile, being set as metalwork can be with Increase the intensity of blade 2 and riser 3, make blade 2 and riser 3 is not easily broken and high temperature resistant, can lower because of blade 2 and riser 3 Deformation and caused by fan disequilibrium, generate the risk of shake, avoid influencing when there is turbulent flow phenomenon the dynamic property of air Energy.

Further, the plastic parts in each blade 2 can be integrally formed with metalwork, to ensure the integral strength of blade 2. Specifically, metalwork can be hardware precision stamping part, which can be placed in plastic mould, make blade 2 It is integrally formed.

Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other The difference of embodiment, just to refer each other for identical similar portion between each embodiment.

Fan provided by the utility model is described in detail above.Specific case used herein is to this reality It is expounded with novel principle and embodiment, the explanation of above example is only intended to help to understand the utility model Method and its core concept.It should be pointed out that for those skilled in the art, the utility model is not being departed from Under the premise of principle, can also to the utility model, some improvement and modification can also be carried out, these improvement and modification also fall into this practicality In novel scope of the claims.

Claims (10)

1. a kind of fan, several blades (2) set gradually including shaft (1) and along the circumferential direction of the shaft (1), feature It is, the windward side of each blade (2) is equipped with the riser (3) of shark fin-shaped, and the circumferential surface of the riser (3) is by the first face (31), the second face (32) and third face (33) surround, first face (31) along the shaft (1) circumferentially extending and be connected to On the windward side of the corresponding blade (2), second face (32) is with the third face (33) towards the corresponding blade (2) Front ride out arc-shaped face.

2. fan according to claim 1, which is characterized in that the windward side of each blade (2) and the axial direction of leeward The section arc type consistent for bending situation.

3. fan according to claim 2, which is characterized in that cross trailing edge (22) free end endpoint tangent line relative to With axially vertical plane in 45 ° of inclinations.

4. fan according to claim 3, which is characterized in that the blade inlet edge (21) of the blade (2) is by the shaft (1) the indent arc section that indent arc section, radius that radius is 6.0mm are 6.9mm, radius 5.7mm are followed successively by free end Evagination arc section and radius be 5.3mm indent arc section, the trailing edge (22) of the blade (2) is by the shaft (1) it is followed successively by indent arc section that evagination arc section, radius that radius is 10.5mm are 11mm to free end and radius is The evagination arc section of 6.3mm, adjacent blade (2) the free end tip-clearance are 8.75mm.

5. fan according to claim 1, which is characterized in that the thickness of the riser (3) becomes larger from front to back.

6. fan according to claim 1, which is characterized in that the riser (3) on each blade (2) is close to the leaf The free end setting of piece (2).

7. fan according to claim 1, which is characterized in that the second face (32) of each riser (3) and third face (33) projection of the top formed in the axial direction is fallen within except the corresponding blade (2).

8. fan according to claim 1, which is characterized in that the second face (32) of each blade is set on third face (33) Front, second face (32) is the arc surface that radius is 7.5mm, and the third face (33) is the circular arc that radius is 4.5mm Face.

9. according to the fan described in claim 1 to 8 any one, which is characterized in that the blade (2) is including being set on windward side On metalwork and be set on leeward and the plastic parts being coated on the metalwork, the riser be metalwork.

10. fan according to claim 9, which is characterized in that in each blade (2) plastic parts and metalwork one into Type.