CN219639119U - Double air inlet centrifugal fan blade - Google Patents
Double air inlet centrifugal fan blade Download PDFInfo
- Publication number
- CN219639119U CN219639119U CN202320331420.2U CN202320331420U CN219639119U CN 219639119 U CN219639119 U CN 219639119U CN 202320331420 U CN202320331420 U CN 202320331420U CN 219639119 U CN219639119 U CN 219639119U
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- blade group
- centrifugal fan
- wind
- middle disc
- air inlet
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- 230000004323 axial length Effects 0.000 claims abstract description 6
- 238000003780 insertion Methods 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to the field of centrifugal wind wheels, in particular to a double-air-inlet centrifugal fan blade, which comprises a middle plate, a first blade group, a second blade group, a first wind ring and a second wind ring, wherein the first blade group and the second blade group are circumferentially arranged along the outer edges of two end surfaces of the middle plate; a first air cavity is formed between the first blade group and the middle plate, and a second air cavity is formed between the second blade group and the middle plate; the method is characterized in that: the axial length of the first blade group is greater than that of the second blade group, and a middle disc hole for communicating the first air cavity and the second air cavity is formed in the middle disc; the center plate axle center department is provided with the shaft hole that is used for connecting the motor shaft, and the insertion end in shaft hole is towards second wind chamber. In this scheme, receive the second wind chamber that is less of motor influence intake, the intake in first wind chamber is guaranteed, so reduced the influence of motor to the intake on the whole, promotes the amount of wind of two air inlet centrifugal fan blades.
Description
Technical Field
The utility model relates to the field of centrifugal wind wheels, in particular to a double-air-inlet centrifugal fan blade.
Background
The centrifugal fan drives gas to flow through rotation of the centrifugal fan blades, so that the functions of exhausting, ventilating, cooling and the like are realized. The centrifugal fan is widely applied to equipment such as air conditioners, vehicles and the like, or applied to occasions such as factories, mines and the like. The existing double-air-inlet centrifugal fan blade mainly comprises a middle disc, a shaft sleeve with a shaft hole, an upper blade group, a lower blade group and two wind rings, wherein the upper blade group and the lower blade group are respectively and regularly arranged along the edges of two sides of the middle disc, the wind rings are respectively arranged at the end parts of the outer sides of the upper blade group and the lower blade group, and the shaft sleeve with the shaft hole, through which a motor shaft passes, is arranged at the center of the middle disc. Reference is made in particular to the prior patent solutions described in CN202326404U, CN201420710Y, CN 217129902U.
In the prior art, the lengths of the upper blade group and the lower blade group at two sides of the centrifugal fan blade are consistent, and the sizes of wind cavities formed at two sides of the middle disc are consistent. When the centrifugal fan blade rotates, an air inlet is formed between two wind rings, and an air outlet is formed between two adjacent blades in the same blade group. However, when the centrifugal fan blade is installed, one side of the centrifugal fan blade is required to be connected with a motor, and the motor is positioned at the position of the air inlet of the side air cavity, so that the air inlet of the side air cavity can be seriously blocked, the air inlet of the side air cavity can not meet the air outlet requirement, and the overall air quantity of the fan blade is influenced.
Disclosure of Invention
In order to solve the above problems, the present utility model aims to provide a double air inlet centrifugal fan blade, wherein the second air chamber is smaller in air inlet quantity affected by a motor, and the length of the second blade group is reduced, so that the air outlet quantity requirement of the second air chamber can be objectively reduced. The air inlet of the first air cavity is ensured, so that the influence of the motor on the air inlet is reduced on the whole, and the air quantity of the double-air inlet centrifugal fan blade is improved.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the double air inlet centrifugal fan blade comprises a middle plate, a first blade group, a second blade group, a first wind ring and a second wind ring, wherein the first blade group and the second blade group are circumferentially arranged along the outer edges of two end surfaces of the middle plate; a first air cavity is formed between the first blade group and the middle plate, and a second air cavity is formed between the second blade group and the middle plate; the method is characterized in that: the axial length of the first blade group is greater than that of the second blade group, and a middle disc hole for communicating the first air cavity and the second air cavity is formed in the middle disc; the center plate axle center department is provided with the shaft hole that is used for connecting the motor shaft, and the insertion end in shaft hole is towards second wind chamber.
According to the technical scheme, the double-air-inlet centrifugal fan blade is characterized in that the first blade group and the second blade group on two sides of the middle disc are set to be inconsistent in length on the basis of the prior art, and particularly the axial length of the first blade group is larger than that of the second blade group, so that air cavities on two sides of the centrifugal fan blade are not equally divided, but are obviously larger than that of the second air cavity. Under this condition, this scheme will connect the insertion end in the shaft hole of motor shaft towards the second wind chamber, receives the second wind chamber that is less of motor influence intake like this, and reduces the second vane group length and objectively reducible the air output demand in second wind chamber. The air inlet of the first air cavity is ensured, so that the influence of the motor on the air inlet is reduced on the whole, and the air quantity of the double-air inlet centrifugal fan blade is improved.
On the basis, the first blade group and the second blade group with different lengths are adopted in the scheme, so that the air quantity at two sides is obviously different. In the scheme, a middle disc hole is formed in the middle disc, and a part of components of the second air cavity are compensated based on the first air cavity of the middle disc Kong Kerang. And when the whole machine operates under the working condition of air outlet resistance, the wind pressure at two sides of the fan blade is balanced, and abnormal conditions such as surge are reduced.
Preferably, the middle disc is formed with a hub part protruding to the second wind cavity, and a shaft hole is formed in the center of the hub part. In the technical scheme, the center of the middle disc is constructed into an arch shape protruding towards the second wind cavity, and the shaft hole is arranged at the center of the hub part. Therefore, the shaft hole is close to the air inlet of the second air cavity, the driving motor can be connected with the shaft hole by adopting a shorter motor shaft, or the driving motor can be arranged farther from the air inlet by adopting the motor shaft with the original length, so that the influence on the air inlet quantity is reduced.
In a further scheme, the hub part is axially extended and provided with a sleeve part at the edge of the shaft hole facing the first wind cavity side, and the outer wall of the sleeve part is connected with the hub part through a plurality of reinforcing ribs; a shaft sleeve is arranged in the through hole on the inner side of the sleeve part, and a shaft hole for connecting a motor shaft is formed in the center of the shaft sleeve.
Preferably, the plurality of center plate holes are provided, and the plurality of center plate holes are circumferentially arranged on the center plate outside the hub portion.
Preferably, the outer side edge of the middle plate is provided with annular ribs which extend beyond the outer edges of the first blade group and the second blade group. Here, the annular rib acts: during injection molding, the circular ribs play a role in positioning in the mold, so that the blade cracking and napping caused by the opposite pulling process of the blades on two sides are reduced, the molding quality is improved, and meanwhile, the strength of the middle plate is increased.
Preferably, the middle plate, the first blade group, the second blade group, the first wind ring and the second wind ring are all integrally injection molded, and the double-air-inlet centrifugal fan blade constructed in an integral injection molding mode is higher in strength.
Preferably, the first blade group and the second blade group are staggered in the circumferential direction, so that the wind discharging rules on two sides of the staggered blade group are different, and wind resistance is not easy to generate.
Drawings
Fig. 1 is a schematic side view of a double air inlet centrifugal fan blade according to the utility model.
Fig. 2 is a schematic diagram of an end face structure of a double air inlet centrifugal fan blade according to the utility model.
Fig. 3 is a cross-sectional view A-A of fig. 2.
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 3, the double-air-intake centrifugal fan blade according to the present embodiment includes a middle disk 1, a first blade group 2 and a second blade group 3 circumferentially arranged along the outer edges of both end surfaces of the middle disk 1, and a first wind ring 4 connected to the outer side of the top of the first blade group 2 and a second wind ring 5 connected to the outer side of the top of the second blade group 3. A first air cavity is formed between the first blade group 2 and the middle disc 1, and a second air cavity is formed between the second blade group 3 and the middle disc 1. The double-air-inlet centrifugal fan blade is characterized in that the middle disc 1, the first blade group 2, the second blade group 3, the first air ring 4 and the second air ring 5 are integrally injection molded, and the double-air-inlet centrifugal fan blade constructed in an integral injection molding mode is higher in strength. In a further scheme, the first blade group 2 and the second blade group 3 are arranged in a staggered mode in the circumferential direction, so that the difference of air outlet rules at two sides of the staggered blade group is facilitated, and wind resistance is not easy to generate.
As shown in fig. 3, the axial length of the first blade set 2 is greater than that of the second blade set 3, and the middle disc 1 is provided with a middle disc hole 11 for communicating the first air cavity and the second air cavity. The axle center of the middle disc 1 is provided with an axle hole 16 for connecting a motor shaft, and the insertion end of the axle hole 16 faces the second air cavity. On the basis of the prior art, the first blade group 2 and the second blade group 3 on two sides of the middle disc 1 are set to be inconsistent in length, specifically, the axial length of the first blade group 2 is greater than that of the second blade group 3, and therefore, the wind cavities on two sides of the centrifugal fan are not equally divided, but the first wind cavity is obviously greater than the second wind cavity. In this case, the insertion end of the shaft hole 16 connected with the motor shaft faces the second air cavity, so that the second air cavity with smaller air inlet quantity is affected by the motor, and the length of the second blade set 3 is reduced, so that the air outlet quantity requirement of the second air cavity can be objectively reduced. The air inlet of the first air cavity is ensured, so that the influence of the motor on the air inlet is reduced on the whole, and the air quantity of the double-air inlet centrifugal fan blade is improved.
On the basis, the first blade group 2 and the second blade group 3 with different lengths are adopted in the scheme, so that the air quantity at two sides is obviously different. In the scheme, the middle disc hole 11 is arranged on the middle disc 1, and the first air cavity can compensate a part of components of the second air cavity based on the middle disc hole 11. And when the whole machine operates under the working condition of air outlet resistance, the wind pressure at two sides of the fan blade is balanced, and abnormal conditions such as surge are reduced.
As shown in fig. 3, the hub plate 1 is formed with a boss portion 12 protruding toward the second wind chamber, and a shaft hole 16 is provided at the center of the boss portion 12. In this embodiment, the center of the center plate 1 is constructed in an arch shape protruding toward the second wind chamber, and the shaft hole 16 is provided at the center of the hub portion 12. Therefore, the shaft hole 16 is close to the air inlet of the second air cavity, the driving motor can be connected with the shaft hole 16 by adopting a shorter motor shaft, or the driving motor 6 can be arranged farther from the air inlet by adopting the motor shaft with the original length, so that the influence on the air inlet quantity is reduced. In a further aspect, the hub portion 12 is provided with a sleeve portion 13 extending axially from an edge of the shaft hole 16 facing the first wind chamber side, and an outer wall of the sleeve portion 13 is connected to the hub portion 12 by a plurality of reinforcing ribs 14. A shaft sleeve 15 is installed in the through hole 131 inside the sleeve part 13, and a shaft hole 16 for connecting a motor shaft is formed at the center of the shaft sleeve 15.
In the above-mentioned aspect, the plurality of middle disc holes 11 are provided, and the plurality of middle disc holes 11 are circumferentially arranged on the middle disc 1 outside the hub portion 12. The outer side edge of the middle disc 1 is provided with a circular rib 17 which exceeds the outer edges of the first blade group 2 and the second blade group 3. Here, the annular bead 17 functions as: during injection molding, the circular ribs 17 play a role in positioning in the mold, so that the blade cracking and napping caused by the opposite-pulling process of the blades at two sides are reduced, the molding quality is improved, and meanwhile, the strength of the middle plate 1 is increased.
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 (7)
1. The double-air-inlet centrifugal fan blade comprises a middle disc (1), a first blade group (2) and a second blade group (3) which are circumferentially arranged along the outer edges of two end surfaces of the middle disc (1), a first wind ring (4) connected to the outer side of the top of the first blade group (2) and a second wind ring (5) connected to the outer side of the top of the second blade group (3); a first air cavity is formed between the first blade group (2) and the middle disc (1), and a second air cavity is formed between the second blade group (3) and the middle disc (1); the method is characterized in that: the axial length of the first blade group (2) is greater than that of the second blade group (3), and a middle disc hole (11) for communicating the first air cavity and the second air cavity is formed in the middle disc (1); the center plate (1) is provided with a shaft hole (16) for connecting a motor shaft, and the insertion end of the shaft hole (16) faces the second air cavity.
2. The double air inlet centrifugal fan blade according to claim 1, wherein: the middle disc (1) protrudes towards the second wind cavity to form a hub part (12), and a shaft hole (16) is formed in the center of the hub part (12).
3. The double air inlet centrifugal fan blade according to claim 2, wherein: the hub part (12) is axially provided with a sleeve part (13) extending towards the edge of the shaft hole (16) at the side of the first wind cavity, and the outer wall of the sleeve part (13) is connected with the hub part (12) through a plurality of reinforcing ribs (14); a shaft sleeve (15) is arranged in a through hole (131) on the inner side of the sleeve part (13), and a shaft hole (16) for connecting a motor shaft is formed in the center of the shaft sleeve (15).
4. The double air inlet centrifugal fan blade according to claim 2, wherein: the plurality of middle disc holes (11) are arranged on the middle disc (1) outside the hub part (12) along the circumferential direction.
5. The double air inlet centrifugal fan blade according to claim 1, wherein: the outer side edge of the middle disc (1) is provided with a circular rib (17) which exceeds the outer edges of the first blade group (2) and the second blade group (3).
6. The double air inlet centrifugal fan blade according to claim 1, wherein: the middle plate (1), the first blade group (2), the second blade group (3), the first wind ring (4) and the second wind ring (5) are all integrally injection molded.
7. The double air inlet centrifugal fan blade according to claim 1, wherein: the first blade group (2) and the second blade group (3) are arranged in a staggered mode in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320331420.2U CN219639119U (en) | 2023-02-14 | 2023-02-14 | Double air inlet centrifugal fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320331420.2U CN219639119U (en) | 2023-02-14 | 2023-02-14 | Double air inlet centrifugal fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219639119U true CN219639119U (en) | 2023-09-05 |
Family
ID=87809246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320331420.2U Active CN219639119U (en) | 2023-02-14 | 2023-02-14 | Double air inlet centrifugal fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219639119U (en) |
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2023
- 2023-02-14 CN CN202320331420.2U patent/CN219639119U/en active Active
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