CN109185225B - Fan blade and fan - Google Patents
Fan blade and fan Download PDFInfo
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- CN109185225B CN109185225B CN201811419511.1A CN201811419511A CN109185225B CN 109185225 B CN109185225 B CN 109185225B CN 201811419511 A CN201811419511 A CN 201811419511A CN 109185225 B CN109185225 B CN 109185225B
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- 238000005452 bending Methods 0.000 claims abstract description 37
- 230000003068 static effect Effects 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 54
- 239000002356 single layer Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
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
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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
- F04D29/30—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
- F04D29/666—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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a fan blade and a fan, wherein the fan blade comprises a mounting cylinder and a plurality of outer-layer blades, the fan blade is provided with a reference plane perpendicular to the axis of the mounting cylinder, the projection of the outer circumferential surface of the mounting cylinder on the reference plane is a reference circle, and the reference circle is provided with a circle center O; taking a cylindrical surface with radius r and concentric with the mounting cylinder to intercept the outer layer blade to obtain a reference section, wherein the projection of the reference section on a reference plane is a first reference curve section, the midpoint of the first reference curve section is a reference point A, and the connecting line of the reference point A and the circle center O forms a reference line L1; the projection of the surface of the outer layer blade connected with the mounting cylinder on the reference plane is a second reference curve section, the midpoint of the second reference curve section is a reference point B, and a reference line L2 is formed by the connection line of the reference point B and the circle center O; the included angle between the reference line L1 and the reference line L2 is the static bending angle alpha of the blade; wherein alpha is more than or equal to 0 and less than or equal to 12 degrees. The invention solves the problem of loud noise of the fan in the prior art when the fan runs.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a fan blade and a fan.
Background
In the prior art, a single-layer fan blade with a simple structure is generally adopted, and in the using process of the single-layer fan blade, the wind power around the single-layer fan blade is strong, the wind power in the center is weak, so that the air supply effect of the fan is poor, and the using experience of a user is influenced. In order to increase the air volume of the fan, a mode of increasing the diameter of a single-layer fan blade or increasing the rotating speed of the single-layer fan blade is generally adopted, so that the fan is noisier in operation.
Disclosure of Invention
The invention mainly aims to provide a fan blade and a fan so as to solve the problem that the fan in the prior art is loud in noise during operation.
In order to achieve the above object, according to one aspect of the present invention, there is provided a fan blade including a mounting cylinder and a plurality of outer layer blades spaced around an outer circumferential surface of the mounting cylinder; the fan blade is provided with a reference plane perpendicular to the axis of the mounting cylinder, the projection of the outer peripheral surface of the mounting cylinder on the reference plane is a reference circle, and the reference circle is provided with a circle center O; taking a cylindrical surface with radius r and concentric with the mounting cylinder to intercept the outer layer blade to obtain a reference section, wherein the projection of the reference section on a reference plane is a first reference curve section, the midpoint of the first reference curve section is a reference point A, and the connecting line of the reference point A and the circle center O forms a reference line L1; the projection of the surface of the outer layer blade connected with the mounting cylinder on the reference plane is a second reference curve section, the midpoint of the second reference curve section is a reference point B, and a reference line L2 is formed by the connection line of the reference point B and the circle center O; the included angle between the reference line L1 and the reference line L2 is the static bending angle alpha of the blade; wherein alpha is more than or equal to 0 and less than or equal to 12 degrees.
Further, the outer layer blade is bent towards the rotating direction of the mounting cylinder, the projection of the curved surface of the outer layer blade, which is far away from the rotating direction, on the reference plane is a guiding edge, the intersection point of the guiding edge and the first reference curve section is a reference point C, and a reference line L3 is continuously formed by the reference point C and the circle center O; the tangent line of the guide edge forms a reference line L4, and the included angle between the reference line L3 and the reference line L4 is the guide edge bending angle beta; wherein, beta is more than or equal to 4 degrees and less than or equal to 42 degrees.
Further, the outer layer blades are arranged in a bending mode along the axial direction of the mounting cylinder, the reference section is provided with a chord line K, and an included angle between the chord line K and the reference plane is a blade mounting angle Q; wherein Q is more than or equal to 6 degrees and less than or equal to 32 degrees.
Further, the outer layer blade comprises a first air guide section and a second air guide section which are connected, the first air guide section is connected with the mounting cylinder, and the bending directions of the first air guide section and the second air guide section are opposite; the reference section comprises a first section corresponding to the first air guide section and a second section corresponding to the second air guide section; the reference plane includes a first reference plane intersecting an end point of the first section remote from the second section, and a second reference plane intersecting an end point of the second section remote from the first section; the first section is provided with a chord line K1, and the included angle between the chord line K1 and the first reference plane is Q1, wherein Q1 is more than or equal to 11 degrees and less than or equal to 32 degrees; the second section has a chord line K2, and the angle between the chord line K2 and the second reference plane is Q2, wherein Q2 is more than or equal to 6 DEG and less than or equal to 26 deg.
Further, the outer diameter of the mounting cylinder is D, and the maximum radius of the connecting line of the outer layer blade and the circle center O is R, wherein D is more than or equal to R and less than or equal to R.
Further, D/r=0.6.
Further, the relationship between the blade static bending angle α, the leading bending angle β, the blade mounting angles Q and R/R is set with reference to the following table:
TABLE 1
The above table is table 1.
Further, the relationship between the blade static bending angle α, the leading bending angle β, the blade mounting angles Q and R/R is set with reference to the following table:
TABLE 2
The above table is table 2.
Further, the fan blade further includes: the hub is arranged concentrically with the mounting cylinder and is positioned at the inner side of the mounting cylinder; the inner layer blades are arranged around the periphery of the hub at intervals and connected between the hub and the mounting cylinder.
Further, the mounting cylinder, the plurality of outer layer blades, the hub and the plurality of inner layer blades are integrally formed.
According to another aspect of the present invention, a fan is provided, including the blade described above.
By applying the technical scheme of the application, the outer-layer blade in the wing-shaped design is designed, and the running noise of the fan blade is reduced and the service performance of the fan blade adopting the outer-layer blade is improved by optimizing the structural parameters of the outer-layer blade. Specifically, the application optimizes the static bending angle alpha of the parameter blade, so that alpha is more than or equal to 0 and less than or equal to 12 degrees, and test data show that when alpha is more than or equal to 0 and less than or equal to 12 degrees, the running noise of the blade is obviously reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a schematic structural view of a fan blade according to an alternative embodiment of the present invention;
FIG. 2 shows a schematic view of a projection structure of the fan blade of FIG. 1 on a reference plane;
FIG. 3 shows a schematic structural view of an outer layer blade of the fan blade of FIG. 1;
Fig. 4 shows a schematic structural view of a reference section of the outer layer blade of the fan blade of fig. 1.
Wherein the above figures include the following reference numerals:
10. a mounting cylinder; 20. an outer layer blade; 21. a first cross section; 22. a second cross section; 30. a hub; 40. inner layer blades; 1. a cylindrical surface; 2. edge guiding; 3. a first reference plane; 4. a second reference plane; 5. fold lines; 23. an auxiliary wind surface; 24. a main wind surface; 25. avoiding the wind surface.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the problem that the fan in the prior art is large in noise during operation, the invention provides a fan blade and a fan. The fan comprises the fan blade.
As shown in fig. 1, the fan blade comprises a mounting cylinder 10 and a plurality of outer-layer blades 20, wherein the outer-layer blades 20 are arranged at intervals around the outer circumferential surface of the mounting cylinder 10; the fan blade is provided with a reference plane perpendicular to the axis of the installation cylinder 10, the projection of the outer peripheral surface of the installation cylinder 10 on the reference plane is a reference circle, and the reference circle is provided with a circle center O; taking a cylindrical surface 1 with radius r and concentricity with the mounting cylinder 10 to intercept the outer layer blade 20 to obtain a reference section, wherein the projection of the reference section on a reference plane is a first reference curve section, the midpoint of the first reference curve section is a reference point A, and the connecting line of the reference point A and the circle center O forms a reference line L1; the projection of the surface of the outer layer blade 20 connected with the mounting cylinder 10 on the reference plane is a second reference curve section, the midpoint of the second reference curve section is a reference point B, and the connecting line of the reference point B and the circle center O forms a reference line L2; the included angle between the reference line L1 and the reference line L2 is the static bending angle alpha of the blade; wherein alpha is more than or equal to 0 and less than or equal to 12 degrees.
In the application, the outer layer blade 20 in an airfoil design is designed, and through optimizing the structural parameters of the outer layer blade 20, the running noise of the fan blade is reduced, and the service performance of the fan blade adopting the outer layer blade is improved. Specifically, the application optimizes the static bending angle alpha of the parameter blade, so that alpha is more than or equal to 0 and less than or equal to 12 degrees, and test data show that when alpha is more than or equal to 0 and less than or equal to 12 degrees, the running noise of the blade is obviously reduced.
Compared with the common blade with a simple structure and medium thickness in the prior art, the outer blade provided by the application has excellent performance, reduces the gas flow loss and improves the gas flow efficiency.
As shown in fig. 2, the outer layer blade 20 is curved toward the rotation direction of the mounting cylinder 10, the projection of the curved surface of the outer layer blade 20 far from the rotation direction on the reference plane is a guiding edge 2, the intersection point of the guiding edge 2 and the first reference curve section is a reference point C, and the reference point C and the circle center O continuously form a reference line L3; the tangent line of the guide edge 2 forms a reference line L4, and the included angle between the reference line L3 and the reference line L4 is a guide edge bending angle beta; wherein, beta is more than or equal to 4 degrees and less than or equal to 42 degrees. The application further optimizes the parameter edge-guiding bending angle beta, so that the beta is more than or equal to 4 degrees and less than or equal to 42 degrees, and test data show that when the beta is more than or equal to 4 degrees and less than or equal to 42 degrees, the running noise of the fan blade is obviously reduced.
As shown in fig. 4, the outer layer blades 20 are arranged in a bending manner along the axial direction of the mounting cylinder 10, the reference section has a chord line K, and the included angle between the chord line K and the reference plane is the blade mounting angle Q; wherein Q is more than or equal to 6 degrees and less than or equal to 32 degrees. According to the application, the parameter blade mounting angle Q is further optimized, so that the Q is more than or equal to 6 degrees and less than or equal to 32 degrees, the blade mounting angle Q influences the gas compression performance of the blade, the wind quantity and the wind speed of the blade are determined, and test data show that when the Q is more than or equal to 6 degrees and less than or equal to 32 degrees, the wind quantity of the blade is larger, so that the energy efficiency of the blade is improved.
As shown in fig. 4, the outer layer blade 20 includes a first wind guiding section and a second wind guiding section connected, the first wind guiding section is connected with the mounting cylinder 10, and the bending directions of the first wind guiding section and the second wind guiding section are opposite; the reference section comprises a first section 21 corresponding to the first wind guiding section and a second section 22 corresponding to the second wind guiding section; the reference planes comprise a first reference plane 3 intersecting an end point of the first section 21 remote from the second section 22, and a second reference plane 4 intersecting an end point of the second section 22 remote from the first section 21; the first section 21 has a chord line K1, and the angle between the chord line K1 and the first reference plane 3 is Q1, wherein Q1 is more than or equal to 11 degrees and less than or equal to 32 degrees; the second cross section 22 has a chord line K2, the angle between the chord line K2 and the second reference plane 4 being Q2, wherein Q2 is 6 DEG.ltoreq.Q 2.ltoreq.26 deg. The application further optimizes the shape of the outer layer blade 20, and correspondingly optimizes the blade mounting angle Q1 of the first air guide section and the blade mounting angle Q2 of the second air guide section, and test data show that when Q1 is more than or equal to 11 degrees and less than or equal to 32 degrees and Q2 is more than or equal to 6 degrees and less than or equal to 26 degrees, the air supply amount of the fan blade is larger, so that the energy efficiency of the fan blade is effectively improved.
As shown in fig. 3, the first wind guiding section has a secondary wind surface 23, the second wind guiding section has a primary wind surface 24, the secondary wind surface 23 and the primary wind surface 24 are separated by a concave fold line 5, the fold line 5 is a curve, and an included angle is formed between a tangent line of the curve and a reference line L1. In this way, wind generated on the wind surface of the outer layer blades 20 spreads the wind due to the difference in wind surface angle, reducing the concentration of the wind, and reducing the fluctuation range of the wind speed, thereby solving the problem of noise generated by the concentration of the wind.
As shown in fig. 3, the outer layer blade 20 further includes a third wind guiding section connected to the second wind guiding section, where an included angle is formed between the third wind guiding section and the second wind guiding section, and the third wind guiding section has a wind avoiding surface 25, where the wind avoiding surface 25 is located at a position of the main wind surface 24 facing the front edge fluid of the adjacent outer layer blade 20, for avoiding the front edge fluid, so as to effectively reduce interference of the fluid between the tail edge of the outer layer blade 20 and the front edge of the adjacent outer layer blade 20, and further reduce operation noise of the outer layer blade 20. According to the outer-layer blade 20 provided by the application, the fluctuation range of wind speed is further reduced by arranging the three wind guide sections, and the running noise of the fan blade is reduced.
Optionally, an included angle between the third air guiding section and the second air guiding section is between 5 degrees and 20 degrees.
As shown in FIG. 2, the outer diameter of the mounting cylinder 10 is D, and the maximum radius of the connecting line of the outer layer blades 20 and the circle center O is R, wherein D is equal to or less than R is equal to or less than R.
Alternatively, D/r=0.6.
Optionally, the present application further optimizes the relationship between the blade static bending angle α, the lead bending angle β, the blade mounting angles Q and R/R, specifically, the relationship between the blade static bending angle α, the lead bending angle β, the blade mounting angles Q and R/R is set with reference to the following table:
TABLE 1
The table is shown in table 1, and the relationship among the static bending angle alpha, the edge guiding bending angle beta and the blade mounting angles Q and R/R is optimized according to the numerical range of table 1, so that the fan blade provided by the application has higher energy efficiency and lower running noise.
The static bending angle alpha and the edge guiding bending angle beta of the blade determine the noise, the installation angle Q of the blade mainly plays a role in the gas compression performance, the air quantity and the air speed are determined, and the purposes of high efficiency and low noise are achieved by optimizing various parameters.
Alternatively, in one specific embodiment of the present application, when R/r=0.6, L2 and L1 are disposed in order along the rotation direction of the mounting cylinder 10, and the blade net bending angle α=0.5 °; in yet another embodiment of the present application, when R/r=0.6, L1 and L2 are disposed in order along the rotation direction of the mounting cylinder 10, and the blade net bending angle α=0.5°.
If it is assumed that clockwise is positive and counterclockwise is negative, when L2 and L1 are sequentially arranged in the rotation direction of the mounting cylinder 10, a negative sign "-" is added before the net bending angle of the blade; when L1 and L2 are disposed in order in the rotational direction of the mounting cylinder 10, the positive sign "+" is added before the net bending angle of the blade.
Preferably, the relationship between the blade static bending angle α, the leading bending angle β, the blade mounting angles Q and R/R is set with reference to the following table:
TABLE 2
The above table is table 2. The preferred embodiment of the fan blade is designed according to the numerical value of the table 2, so that the fan blade provided by the application has higher energy efficiency and lower running noise.
Note that, when the value of r is small, only the first wind guiding section can be cut, but the second wind guiding section cannot be cut, so in table 1 and table 2, the value of the portion Q2 is replaced with "-".
As shown in fig. 1 and 2, the fan blade further includes a hub 30 concentrically disposed with the mounting cylinder 10 and located inside the mounting cylinder 10, and a plurality of inner layer blades 40 spaced around the outer circumference of the hub 30 and connected between the hub 30 and the mounting cylinder 10. Thus, the application increases the number of the fan blades on the basis of not increasing the density of the fan blades by arranging the inner-layer blades 40 and the outer-layer blades 20, increases the continuous flatness and stability of the wind, and avoids the excessive concentration of the wind.
The fan blade provided by the application has double layers of blades, so that the wind sense of the wind provided by the fan blade is soft, the wind quantity is larger, the power of the fan blade is lower, the noise is lower, and the overall performance of the fan blade is improved.
Optionally, the tips of the inner blades 40 are connected to the mounting cylinder 10.
In the prior art, only a single-layer common blade with a simple structure is arranged, and under the action of centrifugal force, wind sent out by the blade is quickly thrown out to the periphery, and the air flow in the center of the blade is weaker, so that the air supply distance of the blade is shorter.
The fan blade provided by the application is provided with the outer layer blade 20 and the inner layer blade 40, when the fan blade runs, the fan blade rotates clockwise, the inner layer blade 40 and the outer layer blade 20 push air to move towards the outlet direction of the fan, the output air quantity of the outer layer blade 20 is larger, and the output air quantity of the inner layer blade 40 is smaller, so that the inner side and the outer side of the installation cylinder 10 respectively form a stream of air flow. The two air flows rub each other at the junction, and the centrifugal diffusion effect is greatly reduced, so that the wind sent out by the fan is concentrated and does not diverge, and the wind can be sent to a position farther away. In addition, due to the existence of the air flow at the inner side, the problem of vortex of the air flow at the outlet of the fan can be solved, so that the flow efficiency of the air is improved, and the fan provided by the application can stably push the air flow to a more distant place.
Alternatively, the plurality of inner blades 40 are uniformly spaced around the outer circumference of the hub 30, and the plurality of outer blades 20 are uniformly spaced around the outer circumference of the mounting cylinder 10. Thus, the pneumatic performance of the fan blade is improved, and the power consumption of the fan blade is reduced.
Optionally, the mounting cylinder 10, the plurality of outer layer blades 20, the hub 30 and the plurality of inner layer blades 40 are integrally formed, so that the processing and manufacturing of the fan blade are facilitated, the structural strength of the fan blade can be improved, the mounting cylinder 10, the plurality of outer layer blades 20, the hub 30 and the plurality of inner layer blades 40 can not move mutually, and the reliable performance of the fan blade is ensured.
Alternatively, the mounting barrel 10, the plurality of outer blades 20, the hub 30, and the plurality of inner blades 40 are integrally injection molded.
The performance comparison of the fan blade with the outer layer blade 20 provided by the application and the fan blade with the single-layer common blade in the prior art is shown in the following table:
TABLE 3 Table 3
| Scheme for the production of a semiconductor device | Rotating speed (rpm) | Air volume (m 3/min) | Energy efficiency | Noise generation |
| Fan blade in the prior art | 900 | 52.3 | 1.59 | 58.2 |
| The application provides a fan blade | 900 | 56.8 | 1.60 | 56.4 |
The table is shown in table 3, and it can be seen from table 3 that the fan blade with the outer layer blade 20 provided by the application has the advantages of effectively improving energy efficiency, improving air quantity by 8% and obviously reducing noise under the condition of unchanged rotating speed.
The fan blade provided by the application can increase the air supply range, improve the energy efficiency, improve the air supply softness and effectively reduce the operation noise of the fan blade while ensuring the air supply distance.
The fan provided by the application comprises the fan blade, so that the wind sense of the wind sent out by the fan provided by the application is soft, the wind quantity is larger, the power is lower, the noise is lower, the running tone quality of the fan is improved, and the overall performance of the fan is improved.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The fan blade is characterized by comprising a mounting cylinder (10) and a plurality of outer-layer blades (20), wherein the outer-layer blades (20) are arranged at intervals around the outer circumferential surface of the mounting cylinder (10);
The fan blade is provided with a reference plane perpendicular to the axis of the mounting cylinder (10), the projection of the outer peripheral surface of the mounting cylinder (10) on the reference plane is a reference circle, and the reference circle is provided with a circle center O;
Taking a cylindrical surface (1) with the radius r and concentric with the mounting cylinder (10) to intercept the outer layer blade (20) to obtain a reference section, wherein the projection of the reference section on the reference plane is a first reference curve section, the midpoint of the first reference curve section is a reference point A, and the connecting line of the reference point A and the circle center O forms a reference line L1;
The projection of the surface, connected with the mounting cylinder (10), of the outer layer blade (20) on the reference plane is a second reference curve section, the midpoint of the second reference curve section is a reference point B, and a connecting line of the reference point B and the circle center O forms a reference line L2; the included angle between the reference line L1 and the reference line L2 is a static bending angle alpha of the blade; wherein alpha is more than or equal to 0 and less than or equal to 12 degrees;
The outer layer blade (20) comprises a first air guide section and a second air guide section which are connected, the first air guide section is connected with the mounting cylinder (10), and the bending directions of the first air guide section and the second air guide section are opposite;
the reference section comprises a first section (21) corresponding to the first wind guiding section and a second section (22) corresponding to the second wind guiding section; the reference plane comprises a first reference plane (3) intersecting an end point of the first section (21) remote from the second section (22), and a second reference plane (4) intersecting an end point of the second section (22) remote from the first section (21);
The first section (21) has a chord line K1, and the angle between the chord line K1 and the first reference plane (3) is Q1, wherein Q1 is more than or equal to 11 degrees and less than or equal to 32 degrees; the second section (22) has a chord line K2, the angle between the chord line K2 and the second reference plane (4) being Q2, wherein Q2 is more than or equal to 6 DEG and less than or equal to 26 DEG;
The fan blade also comprises:
A hub (30), wherein the hub (30) is concentrically arranged with the mounting cylinder (10) and is positioned on the inner side of the mounting cylinder (10);
And a plurality of inner blades (40), wherein the inner blades (40) are arranged around the periphery of the hub (30) at intervals and are connected between the hub (30) and the mounting cylinder (10).
2. The fan blade according to claim 1, wherein,
The outer layer blades (20) are bent towards the rotation direction of the mounting cylinder (10), the projection of the curved surface of the outer layer blades (20) far away from the rotation direction on the reference plane is a guide edge (2), the intersection point of the guide edge (2) and the first reference curve section is a reference point C, and the connecting line of the reference point C and the circle center O forms a reference line L3;
the tangent line of the guide edge (2) forms a reference line L4, and an included angle between the reference line L3 and the reference line L4 is a guide edge bending angle beta; wherein, beta is more than or equal to 4 degrees and less than or equal to 42 degrees.
3. The blade according to claim 2, wherein the outer layer blade (20) is arranged in a curved manner along the axial direction of the mounting cylinder (10), the reference section has a chord line K, and the angle between the chord line K and the reference plane is the blade mounting angle Q; wherein Q is more than or equal to 6 degrees and less than or equal to 32 degrees.
4. A fan blade according to claim 3, wherein the outer diameter of the mounting cylinder (10) is D, and the maximum radius of the connection line between the outer layer blade (20) and the circle center O is R, wherein D is equal to or less than R.
5. The fan blade of claim 4, wherein D/R = 0.6.
6. The fan blade of claim 5, wherein the relationship between the blade static bending angle α, the edge-guiding bending angle β, the blade mounting angles Q and R/R is set with reference to the following table:
TABLE 1
，
The above table is table 1.
7. The fan blade of claim 6, wherein the relationship between the blade static bending angle α, the edge-guiding bending angle β, the blade mounting angles Q and R/R is set with reference to the following table:
TABLE 2
，
The above table is table 2.
8. The fan blade according to claim 1, wherein the mounting cylinder (10), the plurality of outer blades (20), the hub (30) and the plurality of inner blades (40) are integrally formed.
9. A fan comprising a blade according to any one of claims 1 to 8.
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| CN201811419511.1A CN109185225B (en) | 2018-11-26 | 2018-11-26 | Fan blade and fan |
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| CN114233662B (en) * | 2021-12-17 | 2023-09-29 | 西安交通大学 | Axial flow fan blade structure, axial flow fan and preparation method of axial flow fan |
| CN116357611A (en) * | 2021-12-28 | 2023-06-30 | 全亿大科技（佛山）有限公司 | Fan with fan body |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202545349U (en) * | 2012-03-13 | 2012-11-21 | 格力电器（中山）小家电制造有限公司 | Electric fan blade |
| CN204371777U (en) * | 2014-12-29 | 2015-06-03 | 广东美的环境电器制造有限公司 | Fan blade and there is its fan |
| CN209083670U (en) * | 2018-11-26 | 2019-07-09 | 珠海格力电器股份有限公司 | Fan blade and fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4937331B2 (en) * | 2009-11-09 | 2012-05-23 | 三菱電機株式会社 | Blower and heat pump device |
| CN102720700B (en) * | 2012-06-21 | 2015-11-25 | 海尔集团公司 | The blade of axial fan and axial flow fan for air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202545349U (en) * | 2012-03-13 | 2012-11-21 | 格力电器（中山）小家电制造有限公司 | Electric fan blade |
| CN204371777U (en) * | 2014-12-29 | 2015-06-03 | 广东美的环境电器制造有限公司 | Fan blade and there is its fan |
| CN209083670U (en) * | 2018-11-26 | 2019-07-09 | 珠海格力电器股份有限公司 | Fan blade and fan |
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