CN220227271U - Diagonal flow centrifugal wind wheel - Google Patents
Diagonal flow centrifugal wind wheel Download PDFInfo
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- CN220227271U CN220227271U CN202321660685.3U CN202321660685U CN220227271U CN 220227271 U CN220227271 U CN 220227271U CN 202321660685 U CN202321660685 U CN 202321660685U CN 220227271 U CN220227271 U CN 220227271U
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- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009751 slip forming Methods 0.000 claims 1
- 230000009467 reduction Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Abstract
The utility model relates to the field of motor wind wheels, in particular to an oblique flow centrifugal wind wheel. The diagonal flow centrifugal wind wheel comprises a chassis, a plurality of blades, a wind ring and a plurality of blades, wherein the lower end parts of the blades are circumferentially arranged along the outer edge of the chassis; a shaft sleeve for connecting a motor shaft is arranged at the center of the chassis; the cross section of the blade is arc-shaped, the blade is constructed into an inclined blade which gradually inclines towards the leeward surface from the lower end part to the upper end part, saw tooth grooves are arranged on the inner edge of the blade at intervals along the length direction of the blade, corrugated grooves are continuously arranged on the outer edge of the blade along the length direction of the blade, and wave crests are formed between two adjacent corrugated grooves. The diagonal flow centrifugal wind wheel can effectively reduce noise.
Description
Technical Field
The utility model relates to the field of motor wind wheels, in particular to an oblique flow centrifugal wind wheel.
Background
Centrifugal wind wheels have been adopted by indoor air conditioners because of their high efficiency, large air volume and other advantages, but their noise problem has been the bottleneck for improving their performance. Specifically, the existing centrifugal wind wheel comprises a hub, a wind ring and a plurality of blades, wherein the blades are circumferentially and regularly arranged on the edge of the hub around the arched portion, the wind ring is arranged on the outer side of the blades in a surrounding mode, and the inner side wall of the wind ring is connected to the outer side end of the top of the blades. When the centrifugal wind wheel runs, an airflow negative pressure area is formed inside, and airflow is quickly sucked into the negative pressure area from an air inlet between wind rings and then is thrown out from an air outlet between blades. In the process that the air flow is sucked into the negative pressure area, the air flow is changed into a horizontal spiral flow direction from a vertical flow direction, and when friction is generated between the spiral flow air and the blades, the air flow is called as wind cutting. The wind cutting is one of the main reasons of high energy consumption and high noise in the wind wheel and also one of the important factors influencing the efficiency of the wind wheel.
The blades of the conventional centrifugal wind wheel are straight blades; the angle acted on the air by the blade is a right angle; the air at the tail part of the blade tip is greatly stirred by the blade; thus, the noise leaf generated by the centrifugal wind wheel is large.
Disclosure of Invention
In order to solve the problems, the utility model aims to provide an oblique flow centrifugal wind wheel which can effectively reduce noise.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the diagonal flow centrifugal wind wheel comprises a chassis, a plurality of blades, a wind ring and a plurality of blades, wherein the lower end parts of the blades are circumferentially arranged along the outer edge of the chassis; a shaft sleeve for connecting a motor shaft is arranged at the center of the chassis; the method is characterized in that: the cross section of the blade is arc-shaped, the blade is constructed into an inclined blade which gradually inclines towards the leeward surface from the lower end part to the upper end part, saw tooth grooves are arranged on the inner edge of the blade at intervals along the length direction of the blade, corrugated grooves are continuously arranged on the outer edge of the blade along the length direction of the blade, and wave crests are formed between two adjacent corrugated grooves.
The utility model adopts the technical scheme, and the technical scheme relates to an oblique flow centrifugal wind wheel, wherein the lower end parts of a plurality of blades of the oblique flow centrifugal wind wheel are circumferentially arranged along the outer edge of a chassis, and the upper end parts of the blades are connected and arranged on the inner side of a wind ring; an air inlet is formed between the wind rings, and an air outlet is formed between two adjacent blades. When the centrifugal wind wheel operates, air flow enters from the air inlet and radially blows out from the air outlet.
On the basis, the diagonal flow centrifugal wind wheel in the scheme has the following advantages:
1, the blades are constructed as inclined blades gradually inclined from the lower end part to the upper end part to the leeward surface, and the air quantity of the centrifugal wind wheel is increased due to the increase of the air stirring area of the blades with inclination; simultaneously; the inclined blades can effectively weaken noise energy superposition generated by air disturbance at the tail part of the blade tip, so that the airflow gently fluctuates, and the noise is reduced.
And 2, the inner edges of the blades are provided with saw tooth grooves at intervals along the length direction of the blades, so that the air inlet flow is guided to be in a straight line, the internal loss is reduced, the noise superposition amount is reduced, and the noise reduction effect is achieved.
And 3, the outer edge of the blade is continuously provided with a ripple groove along the length direction, and the ripple groove can inhibit the laminar boundary layer separation of the outer edge of the rotating blade and reduce the separation vortex strength so as to realize the purpose of noise reduction of the fan. On the other hand, the outer edge of the saw tooth can change vortex shedding with concentrated frequency into discrete vortex shedding, thereby avoiding the generation of pure tone and realizing the purpose of noise frequency modulation.
In a specific embodiment, the tooth shape of the sawtooth groove is constructed into an isosceles trapezoid with the caliber gradually increasing from the notch to the groove bottom, and the sawtooth groove of the isosceles trapezoid is beneficial to guiding the airflow.
In a specific embodiment, the spacing d between two adjacent serration grooves 1 Is the caliber d of the notch of the saw tooth groove 2 2 to 4 times of the total number of the components.
Preferably, the notches of the corrugation grooves and the corrugation peaks are each configured as oblique notches which slope gradually towards the inner edge from the windward side to the leeward side. In the scheme, the oblique notch is arranged like a blade opening, and when the centrifugal wind wheel rotates, the airflow can be effectively cut with small resistance, so that the running resistance and the noise generated by running are reduced.
In a specific embodiment, a crest is formed between two adjacent corrugation grooves, and the width d of the groove mouth of the corrugation groove 3 For peak width d 4 3 to 5 times of the total weight of the steel sheet.
Preferably, the width d of the notch of the corrugated groove 3 Is greater than the distance d between two adjacent sawtooth grooves 5 。
Preferably, the included angle between the lee surface of the blade and the upper end surface of the chassis is 85-70 degrees, namely the inclination angle of the blade is 5-20 degrees.
Preferably, the center of the chassis is arched upwards to form a convex part, and the lower end parts of the blades are arranged on the outer edge of the chassis outside the convex part.
Preferably, the shaft sleeve passes through the upper end face and the lower end face of the chassis, the upper end face of the chassis is connected with the side wall of the shaft sleeve above the upper end face of the chassis through a plurality of first reinforcing ribs, and the plurality of first reinforcing ribs are regularly arranged along the circumferential direction of the shaft sleeve; the lower end face of the chassis is connected with the side wall of the shaft sleeve below the lower end face of the chassis through a plurality of second reinforcing ribs, and the plurality of first reinforcing ribs are regularly arranged along the circumferential direction of the shaft sleeve. According to the scheme, the first reinforcing ribs and the second reinforcing ribs are arranged, so that the connection strength between the shaft sleeve and the chassis can be enhanced.
Preferably, a notch is arranged on the side wall of the top of the shaft sleeve.
Drawings
Fig. 1 is a perspective view of the top surface of a centrifugal fan blade according to the present utility model.
Fig. 2 is a perspective view of the bottom surface of the centrifugal fan blade according to the utility model.
Fig. 3 is a perspective view of a windward side view of a blade.
Fig. 4 is a perspective view of the lee side of the blade.
Fig. 5 is a front projection view of the blade.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
As shown in fig. 1 to 5, the present embodiment relates to a diagonal flow centrifugal wind wheel, which comprises a chassis 1, a plurality of blades 2 with lower ends circumferentially arranged along the outer edge of the chassis 1, and a wind ring 3 connected to the outer edges of the upper ends of the plurality of blades 2. The center of the chassis 1 is provided with a shaft sleeve 4 for connecting a motor shaft. The cross section of the blade 2 is arc-shaped, the blade 2 is constructed as an inclined blade which gradually inclines from the lower end part to the upper end part to the leeward surface 21, the included angle between the leeward surface 21 of the blade 2 and the upper end surface of the chassis 1 is 85-70 degrees, namely, the inclined angle of the blade 2 is 5-20 degrees. The inner edge of the blade 2 is provided with sawtooth grooves 23 at intervals along the length direction, the outer edge of the blade 2 is provided with ripple grooves 24 continuously along the length direction, and wave crests 25 are formed between two adjacent ripple grooves 24. The lower end parts of a plurality of blades 2 of the diagonal flow centrifugal wind wheel are circumferentially arranged along the outer edge of the chassis 1, and the upper end parts are connected and arranged on the inner side of the wind ring 3. An air inlet is formed between the wind rings 3, and an air outlet is formed between two adjacent blades 2. When the centrifugal wind wheel operates, air flow enters from the air inlet and radially blows out from the air outlet.
On the basis, the diagonal flow centrifugal wind wheel in the scheme has the following advantages:
1, the blades 2 are constructed as inclined blades gradually inclined from the lower end to the upper end toward the leeward surface 21, and the air volume of the centrifugal wind wheel increases due to the increased area of the inclined blades 2 for agitating air. While at the same time. The inclined blades 2 can effectively weaken noise energy superposition generated by air disturbance at the tail part of the blade tip, so that the airflow gently fluctuates, and the noise is reduced.
And 2, the inner edges of the blades 2 are provided with the saw tooth grooves 23 at intervals along the length direction, so that the inlet air flow is guided to be in a straight line, the internal loss is reduced, the noise superposition amount is reduced, and the noise reduction effect is achieved.
And 3, the outer edge of the blade 2 is continuously provided with a ripple groove 24 along the length direction, and the ripple groove 24 can inhibit the laminar boundary layer separation of the outer edge of the rotating blade 2 and reduce the separation vortex strength on one hand, so that the purpose of noise reduction of the fan is realized. On the other hand, the outer edge of the saw tooth can change vortex shedding with concentrated frequency into discrete vortex shedding, thereby avoiding the generation of pure tone and realizing the purpose of noise frequency modulation.
In the specific embodiment shown in fig. 3 and 5, the tooth shape of the sawtooth groove 23 is constructed as an isosceles trapezoid with a gradually increasing caliber from the notch to the groove bottom, and the sawtooth groove 23 of the isosceles trapezoid is beneficial for guiding the air flow. In a particular embodiment, the spacing d between two adjacent serration grooves 23 1 Is the notch caliber d of the sawtooth groove 23 2 2 to 4 times of the total number of the components.
As shown in fig. 4, the notches of the corrugation grooves 24 and the corrugation peaks 25 are each constructed as a diagonal notch gradually inclined toward the inner edge from the windward side 22 to the leeward side 21. In the scheme, the oblique notch is arranged like a blade opening, and when the centrifugal wind wheel rotates, the airflow can be effectively cut with small resistance, so that the running resistance and the noise generated by running are reduced. In a particular embodiment, a crest 25 is formed between two adjacent corrugation grooves 24, the groove mouth width d of the corrugation grooves 3 For peak width d 4 3 to 5 times of the total weight of the steel sheet.
Further, the notch width d of the corrugated groove 3 Is greater than the distance d between two adjacent sawtooth grooves 1 。
In a specific scheme, the center of the chassis 1 is arched upwards to form a convex part 11, and the lower end parts of the blades 2 are arranged on the outer edge of the chassis 1 outside the convex part 11. The side wall at the top of the shaft sleeve 4 is provided with a notch 41, the shaft sleeve 4 passes through the upper end face and the lower end face of the chassis 1, the upper end face of the chassis 1 is connected with the side wall of the shaft sleeve 4 above the upper end face through a plurality of first reinforcing ribs 42, and the plurality of first reinforcing ribs 42 are regularly arranged along the circumferential direction of the shaft sleeve 4. The lower end surface of the chassis 1 is connected with the side wall of the shaft sleeve 4 below the lower end surface through a plurality of second reinforcing ribs 43, and a plurality of first reinforcing ribs 42 are regularly arranged along the circumference of the shaft sleeve 4. This arrangement can strengthen the connection strength between the sleeve 4 and the chassis 1 by providing the first reinforcing ribs 42 and the second reinforcing ribs 43.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.
Claims (10)
1. The diagonal flow centrifugal wind wheel comprises a chassis (1), a plurality of blades (2) with lower ends circumferentially arranged along the outer edge of the chassis (1), and a wind ring (3) connected to the outer edges of the upper ends of the blades (2); a shaft sleeve (4) for connecting a motor shaft is arranged at the center of the chassis (1); the method is characterized in that: the cross section of each blade (2) is arc-shaped, each blade (2) is constructed into an inclined blade which gradually inclines towards the leeward surface (21) from the lower end part to the upper end part, saw tooth grooves (23) are formed in the inner edge of each blade (2) at intervals along the length direction of each blade, corrugated grooves (24) are continuously formed in the outer edge of each blade (2) along the length direction of each blade, and wave crests (25) are formed between every two adjacent corrugated grooves (24).
2. A diagonal flow centrifugal wind wheel according to claim 1, wherein: the tooth form of the sawtooth groove (23) is constructed as an isosceles trapezoid with the caliber gradually increasing from the notch to the groove bottom.
3. A diagonal flow centrifugal wind wheel according to claim 2, wherein: the distance d between two adjacent sawtooth grooves (23) 1 Is the caliber d of the notch of the sawtooth groove (23) 2 2 to 4 times of the total number of the components.
4. A diagonal flow centrifugal wind wheel according to claim 1, wherein: the notches (41) of the corrugation grooves (24) and the wave crests (25) are each configured as an oblique notch (41) which gradually slopes inward from the windward side (22) to the leeward side (21).
5. The diagonal flow centrifugal wind wheel according to claim 4, wherein: a wave crest (25) is formed between two adjacent corrugated grooves (24), and the notch width d of the corrugated groove 3 For peak width d 4 3 to 5 times of the total weight of the steel sheet.
6. A diagonal flow centrifugal wind wheel according to any one of claims 1-5, wherein: the width d of the notch of the corrugated groove 3 Is greater than the distance d between two adjacent sawtooth grooves 1 。
7. A diagonal flow centrifugal wind wheel according to claim 1, wherein: the included angle between the lee surface (21) of the blade (2) and the upper end surface of the chassis (1) is 85-70 degrees.
8. A diagonal flow centrifugal wind wheel according to claim 1, wherein: the center of the chassis (1) is arched upwards to form a protruding part (11), and the lower end parts of the blades (2) are arranged on the outer edge of the chassis (1) outside the protruding part (11).
9. The diagonal flow centrifugal wind wheel according to claim 8, wherein: the shaft sleeve (4) passes through the upper end face and the lower end face of the chassis (1), the upper end face of the chassis (1) is connected with the side wall of the shaft sleeve (4) above the upper end face through a plurality of first reinforcing ribs (42), and the plurality of first reinforcing ribs (42) are regularly arranged along the circumference of the shaft sleeve (4); the lower end face of the chassis (1) is connected with the side wall of the shaft sleeve (4) below the chassis through a plurality of second reinforcing ribs (43), and a plurality of first reinforcing ribs (42) are regularly arranged along the circumference of the shaft sleeve (4).
10. A diagonal flow centrifugal wind wheel according to claim 9, wherein: the side wall of the top of the shaft sleeve (4) is provided with a notch (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321660685.3U CN220227271U (en) | 2023-06-27 | 2023-06-27 | Diagonal flow centrifugal wind wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321660685.3U CN220227271U (en) | 2023-06-27 | 2023-06-27 | Diagonal flow centrifugal wind wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220227271U true CN220227271U (en) | 2023-12-22 |
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ID=89185292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321660685.3U Active CN220227271U (en) | 2023-06-27 | 2023-06-27 | Diagonal flow centrifugal wind wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220227271U (en) |
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2023
- 2023-06-27 CN CN202321660685.3U patent/CN220227271U/en active Active
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