CN215860969U - Wind wheel and fan with same - Google Patents
Wind wheel and fan with same Download PDFInfo
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- CN215860969U CN215860969U CN202120538997.1U CN202120538997U CN215860969U CN 215860969 U CN215860969 U CN 215860969U CN 202120538997 U CN202120538997 U CN 202120538997U CN 215860969 U CN215860969 U CN 215860969U
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Abstract
The utility model provides a wind wheel which comprises a hub and blades distributed in the center of the hub by taking the circle center of the hub as a central point; the thickness of the blade in the first section is equal to or larger than that of the blade in the second section; the thickness of the blade in the second section is larger than that of the blade in the third section; wherein, the first section is a root cylindrical section, the second section is a cylindrical section Sz at 30% -70% of the blade height, and the third section is a top cylindrical section. The design of the blade ensures the strength of the root of the blade, prevents the blade from cracking, lightens the weight of the main load surface of the blade, contributes to the dynamic balance design of the blade and reduces the running load of a motor; the included angle beta between the chord length projection b on the plane blade grid and the axis of the wind wheel is gradually increased along the blade height direction, so that backflow caused by over-low full pressure and over-dense grids at the root of the wind wheel is prevented, and meanwhile, the grid efficiency can be effectively improved.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of fans, in particular to a wind wheel and a fan with the wind wheel.
[ background of the utility model ]
In the prior art, the air supply distance, the air volume and the central air speed of the wind wheel of the floor fan are important performance parameters for judging the quality of the floor fan, and the current wind wheel is often difficult to combine with the three.
The floor fan is developed towards a thinner trend, the design of the wind wheel is an important factor influencing the overall thickness of the floor fan, and if the thickness of the floor fan is simply scaled in the axial direction, blade profile parameters are changed, so that the efficiency and the using effect of the fan are influenced.
Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.
[ Utility model ] content
The utility model aims to provide a wind wheel and a fan with the wind wheel, which aim to overcome the defects in the background technology.
The purpose of the utility model is realized by the following technical scheme:
a wind wheel comprises a hub and blades, wherein the blades are uniformly distributed on the outer surface of the hub; the thickness of the blade on the first section is equal to or larger than that of the blade on the second section; the thickness of the blade in the second section is larger than that of the blade in the third section;
the first section is a cylindrical section at the root of the blade, the second section is a cylindrical section Sz at 30% -70% of the height of the blade, and the third section is a cylindrical section at the top of the blade.
Further, the thickness of the blade in the first section is constant until the thickness of the blade in the second section, and the thickness of the blade in the second section is gradually reduced until the thickness of the blade in the third section.
Further, the blade comprises a leading edge, a trailing edge, a suction surface and a pressure surface;
the suction surface is provided with a maximum bending position on the original section curved surface, and the intersection point of the shortest distance curve from the maximum bending position to the blade profile chord length b ' and the blade profile chord length b ' is o ';
a perpendicular line L1 is a straight line passing through the point o' and perpendicular to the wind wheel axis L2, and a projection plane is a plane passing through the wind wheel axis L2 and having the perpendicular line L1 as a normal line; the section original curved surface is projected on the projection surface to form a plane cascade;
on the plane blade cascade, the maximum bending point of the projection of the suction surface is a point P1, the projection of the chord length b' of the blade profile is a chord length projection b, the intersection point of the perpendicular line passing through the point P1 to the chord length projection b and the projection of the pressure surface is P2, and the connecting line between the point P1 and the point P2 is the maximum thickness c of the plane blade cascade.
And the maximum thickness c of the plane blade cascade is gradually reduced from the first section to the third section or is kept unchanged and then gradually reduced.
Further, the maximum thickness c of the planar cascade remains constant or decreases from the first cross section to the second cross section; and gradually decreases from the second cross section to the third cross section.
Further, an included angle between the chord length projection b and the wind wheel axis L2 is β, and β gradually increases from the first section to the third section.
Further, the angle β formed in the first cross section is βhubAnd the angle beta formed at the third cross section is betath，βth-βhub≥15°。
Further, on the plane blade cascade, o is the projection of o' on the projection plane, a is the distance from the front edge projection point of the front edge of the blade on the projection plane to the point o in the chord length projection b, and a is formed on the first sectionhub、bhub,ahubAnd bhubA is 0.3. ltoreq. ahub/bhub≤0.5。
Further, a is formed on the second cross sectionSz、bSz,aSzAnd bSzA is 0.4. ltoreq. aSz/bSz≤0.5。
Further, in the third cross sectionForm ath、bth,athAnd bthA is 0.45. ltoreq. ath/bth≤0.5。
Further, ahub/bhub≤aSz/bSz≤ath/bth。
Accordingly, the utility model also provides a fan with a wind wheel, wherein the fan comprises the wind wheel as in any one of the above.
Compared with the prior art, the utility model has the following beneficial effects: the design of the blade ensures the strength of the root of the blade, prevents the blade from cracking, lightens the weight of the main load surface of the blade, contributes to the dynamic balance design of the blade and reduces the running load of a motor; the included angle beta between the chord length projection b on the plane blade grid and the axis of the wind wheel is gradually increased, so that backflow caused by too dense grids due to too small full pressure at the root of the wind wheel is prevented, and the efficiency of the wind wheel can be effectively improved.
[ description of the drawings ]
Figure 1 is a three-dimensional schematic view of a wind wheel according to the utility model;
figure 2 is another three-dimensional schematic view of a wind wheel according to the utility model;
figure 3 is a front view of a rotor according to the utility model;
figure 4 is a top view of a wind wheel according to the utility model;
FIG. 5 is a schematic view of a projection of a cross-sectional curvature of a blade according to the present invention;
FIG. 6 is a schematic view of a flat cascade of blades of the present invention after projection of the blade cross-section
FIG. 7 is a schematic view of the relationship between the blade cascade and the axis after the projection of the blade section.
Reference numerals: 11. a hub; 12. a blade; 121. a first cross-section; 122. a second cross-section; 123. a third cross-section; 124. a leading edge; 1241. a leading edge projection point; 125. a trailing edge; 1251. a trailing edge projection point; 126. a suction surface; 1261. projection of a suction surface; 127. a pressure surface; 1271. projecting a pressure surface; 128. a point of maximum flexure; 130. an original curved surface of the section; 140. and (4) a projection surface.
[ detailed description ] embodiments
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, which will enable those skilled in the art to practice the present invention with reference to the accompanying specification. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, and the like are used based on the orientation or positional relationship shown in the drawings. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Referring to fig. 1 to 7, a wind turbine includes a hub 11 and blades 12, the blades 12 are uniformly distributed on an outer surface of the hub 11, and the blades 12 include a root portion, a tip portion and a height.
The thickness of the blade 12 at the first section 121 is equal to or greater than the thickness of the blade at the second section 122; the thickness of the blade at the second section 122 is greater than the thickness of the blade at the third section 123; referring to FIG. 3, the master section of blade 12 from root to tip includes: a root cylindrical section, a cylindrical section Sz located at a position 30% -70% of the leaf height, and a top cylindrical section; wherein the first section 121 is a root cylindrical section, the second section 122 is a cylindrical section Sz at 30% -70% of the height of the blade, and the third section 123 is a top cylindrical section. Specifically, the second cross-section 122 is a cylindrical cross-section at 50% of the blade height. Preferably, from the first section 121 to the second section 122, the thickness of the blade 12 at the first section 121 to the thickness of the blade 12 at the second section 122 are constant, and the thickness of the blade 12 at the second section 122 to the thickness of the blade at the third section 123 are gradually reduced.
As shown in FIGS. 1-5, the blade 12 includes a leading edge 124, a trailing edge 125, a suction side 126, and a pressure side 127. In the rotation direction of the impeller 12, the leading edge 124 is located forward in the rotation direction, and the trailing edge 125 is located rearward in the rotation direction. Referring to fig. 3, the larger the arc is the leading edge 124 and the smaller the arc is the trailing edge 125. The shortest curve of the leading edge 124 and the trailing edge 125 on the cross-section cylinder is called a blade chord length b ', and the blade chord length b' is a curve, and cannot represent the specific relationship with the axis, namely the concept of the primer plane blade cascade.
Referring to fig. 5, the blade 12 is cut into a cylinder to form a section original curved surface 130, and on the section original curved surface 130, the shortest curve between the leading edge 124 and the trailing edge 125 of the blade is the blade chord length b ', and the suction surface projection 1261 has a maximum curvature position on the section original curved surface 130, and the maximum curvature position is the intersection point o' of the shortest distance curve from the blade chord length b 'and the blade chord length b'. The perpendicular line L1 is a straight line passing through the point o' and perpendicular to the rotor axis L2, and the projection plane 140 is a plane passing through the rotor axis L2 and having the perpendicular line L1 as a normal line; the cross-sectional original curved surface 130 is projected on a projection plane 140 to form a planar cascade.
Referring to fig. 6, after the section original curved surface 130 is projected onto the projection surface 140, there are a leading edge projection point 1241, a trailing edge projection point 1251, a suction surface projection 1261 and a pressure surface projection 1271 corresponding thereto.
On the plane blade cascade, o is a projection of o 'on the projection plane 140, a projection of the blade profile chord length b' on the projection plane 140 is a chord length projection b, in fig. 6, the chord length projection b is a distance between a front edge projection point 1241 of the front edge 124 of the blade 12 on the projection plane 140 and a tail edge projection point 1251 of the tail edge 125 of the blade 12 on the projection plane 140, and a is a distance between a front edge projection point 1241 of the front edge 124 of the blade 12 on the projection plane 140 and o point in the chord length projection b.
On the plane blade cascade, the maximum bending point 128 of the suction surface projection 1261 is P1, the intersection point of the perpendicular line of the chord length projection b passing through the pressure surface projection 1271 is P2, and the connecting line between the P1 point and the P2 point is the maximum thickness c of the plane blade cascade.
Referring to fig. 7, the included angle between the projection b of the chord length on the plane blade row and the axis L2 of the wind wheel is β, and the angle is gradually increased from the root to the top.
The angle beta formed at the first cross section 121 is betahubThe angle β formed at the third cross section 123 is βth，βth-βhub≥15°。
The grid of the fan has dense roots and sparse tops, the full pressure of the wind wheel is larger as the beta angle of the wind wheel is smaller, the full pressure of the wind wheel is smaller as the beta angle of the wind wheel is larger, and the reflux phenomenon caused by the over-dense grids and the over-small full pressure of the root of the impeller is effectively solved as the beta angle of the root is smaller; meanwhile, the efficiency of the wind wheel can be effectively improved due to the fact that the beta angle at the top of the wind wheel is large.
As shown in fig. 6, on the plane blade cascade, o is the projection of o' on the projection plane 140, a is the distance between the projection point 1241 of the leading edge 124 of the blade on the projection plane 140 and the o point in the projection b of the chord length, and a is formed on the first cross section 121hub、bhub,ahubAnd bhubA is 0.3. ltoreq. ahub/bhub≤0.5。
Form a at the second cross section 122Sz、bSz,aSzAnd bSzA is 0.4. ltoreq. aSz/bSz≤0.5。
A is formed on the third cross section 123th、bth,athAnd bthA is 0.45. ltoreq. ath/bthA is less than or equal to 0.5, and ahub/bhub≤aSz/bSz≤ath/bth. The precise design of a and b facilitates the dynamic balancing design of the blades 12 and reduces the motor running load.
The a/b value of the root part to the top part of the blade 12 is gradually increased, so that the bending degree of the blade can be effectively reduced, and the problem that the blade is easy to break due to too large bending degree in the use process is solved.
Accordingly, the utility model also provides a fan with a wind wheel, wherein the fan comprises the wind wheel.
The design of the blade ensures the strength of the root of the blade, prevents the blade from cracking, lightens the weight of the main load surface of the blade, contributes to the dynamic balance design of the blade and reduces the running load of a motor; the included angle beta between the chord length projection b on the plane blade grid and the axis of the wind wheel is gradually increased, so that backflow caused by over-low full pressure and over-dense grids at the root of the wind wheel is prevented, and meanwhile, the grid efficiency can be effectively improved.
The above is only one embodiment of the present invention, and any other modifications based on the concept of the present invention are considered as the protection scope of the present invention.
Claims (11)
1. A wind wheel is characterized by comprising a hub and blades, wherein the blades are uniformly distributed on the outer surface of the hub; the thickness of the blade on the first section is equal to or larger than that of the blade on the second section; the thickness of the blade in the second section is larger than that of the blade in the third section;
the first section is a cylindrical section at the root of the blade, the second section is a cylindrical section Sz at 30% -70% of the height of the blade, and the third section is a cylindrical section at the top of the blade.
2. A wind rotor according to claim 1, wherein the thickness of said blade in the first section is constant up to the thickness of said blade in the second section, and the thickness of said blade in the second section is gradually reduced up to the thickness of said blade in the third section.
3. A wind rotor according to claim 1, wherein said blades include a leading edge, a trailing edge, a suction side and a pressure side;
the suction surface is provided with a maximum bending position on the original section curved surface, and the intersection point of the shortest distance curve from the maximum bending position to the blade profile chord length b ' and the blade profile chord length b ' is o ';
a perpendicular line L1 is a straight line passing through the point o' and perpendicular to the wind wheel axis L2, and a projection plane is a plane passing through the wind wheel axis L2 and having the perpendicular line L1 as a normal line; the section original curved surface is projected on the projection surface to form a plane cascade;
on the plane blade cascade, the maximum bending point of the projection of the suction surface is a point P1, the projection of the chord length b' of the blade profile is a chord length projection b, the intersection point of the perpendicular line from the point P1 to the chord length projection b and the projection of the pressure surface is P2, and the connecting line between the point P1 and the point P2 is the maximum thickness c of the plane blade cascade;
and the maximum thickness c of the plane blade cascade is gradually reduced from the first section to the third section or is kept unchanged and then gradually reduced.
4. A wind rotor according to claim 3, wherein: the maximum thickness c of the planar blade cascade remains constant or decreases from the first cross section to the second cross section; and gradually decreases from the second cross section to the third cross section.
5. A wind rotor according to claim 4, wherein: an included angle between the chord length projection b and the wind wheel axis L2 is beta, and the angle beta gradually increases from the first section to the third section.
6. A wind rotor according to claim 5, wherein: the angle beta formed in the first section is betahubAnd the angle beta formed at the third cross section is betath，βth-βhub≥15°。
7. A wind rotor according to claim 3, wherein: on the plane blade cascade, o is the projection of o' on the projection plane, a is the distance from the front edge projection point of the front edge of the blade on the projection plane to the point o in the chord length projection b, and a is formed on a first sectionhub、bhub,ahubAnd bhubA is 0.3. ltoreq. ahub/bhub≤0.5。
8. A wind rotor according to claim 7, wherein: form a on the second cross sectionSz、bSz,aSzAnd bSzA is 0.4. ltoreq. aSz/bSz≤0.5。
9. A wind rotor according to claim 8, wherein: form a on the third cross sectionth、bth,athAnd bthA is 0.45. ltoreq. ath/bth≤0.5。
10. A wind rotor according to claim 9, wherein: a ishub/bhub≤aSz/bSz≤ath/bth。
11. A fan having a rotor, characterized by: the fan comprises a wind rotor according to any of claims 1-10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120538997.1U CN215860969U (en) | 2021-03-15 | 2021-03-15 | Wind wheel and fan with same |
| PCT/CN2022/075625 WO2022193869A1 (en) | 2021-03-15 | 2022-02-09 | Rotor, fan, and stand fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120538997.1U CN215860969U (en) | 2021-03-15 | 2021-03-15 | Wind wheel and fan with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215860969U true CN215860969U (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120538997.1U Active CN215860969U (en) | 2021-03-15 | 2021-03-15 | Wind wheel and fan with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215860969U (en) |
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2021
- 2021-03-15 CN CN202120538997.1U patent/CN215860969U/en active Active
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