A blade for a centrifugal fan wheel, a centrifugal fan wheel and a fan

Abstract

The utility model discloses a kind of blade for centrifugal fan, centrifugal fan and fan, it is related to the field of centrifugal fan, wherein the blade main body of blade for centrifugal fan is located and is equipped with inverted arc surface structure on the side of leading edge suction surface, and inverted round structure is equipped on the side of leading edge pressure surface, blade main body upper part is set away from axis in the direction close to front disc, and lower part is gradually reduced in the direction close to rear disc towards axis distance;Centrifugal fan includes front disc, rear disc and above-mentioned blade, and the outer edge of front disc and rear disc is integrally formed with first reinforcing ring, and rear disc middle part is integrally formed with second reinforcing ring, and arch bridge structure is arranged between adjacent blade main body, and the area of arch bridge structure, upper arch height, arch bridge length and outlet distance ratio are limited;Fan includes above-mentioned centrifugal fan, and the application achieves the technical effects such as optimizing blade structure, enhancing fan strength, improving airflow flow performance.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal impeller technology, and more specifically, to a blade for a centrifugal impeller, a centrifugal impeller and a fan. Background Technology

[0002] Centrifugal impellers and fans play a vital role in modern industry and daily life, with extremely wide applications. In the industrial manufacturing sector, centrifugal impellers and fans are extensively used in the ventilation and heat dissipation of various mechanical equipment.

[0003] In existing technologies, the straight leading edge of the blades limits the air outlet area, resulting in low air volume, low efficiency, and high noise in centrifugal fans of the same size and specifications, which cannot meet the current demand for high-performance, low-energy-consumption equipment.

[0004] In summary, how to solve the problems of low air volume, low efficiency, and high noise in centrifugal fans of the same specifications and dimensions is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a blade for a centrifugal fan that effectively increases airflow guidance and flow, increases air volume, reduces noise from vortex gas collisions and flow loss, improves efficiency, and reduces noise.

[0006] Another objective of this invention is to provide a centrifugal impeller, including the aforementioned centrifugal impeller blades.

[0007] Another objective of this invention is to provide a fan, including the centrifugal impeller described above.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A blade for a centrifugal wind turbine includes a blade body, wherein the blade body has an arc-shaped structure on the suction side of the leading edge and a rounded structure on the pressure side of the leading edge.

[0010] Preferably, the upper part of the blade body is positioned away from the axis in the direction close to the front disc, while the lower part of the blade body is positioned towards the axis in the direction close to the rear disc, with the distance gradually decreasing.

[0011] A centrifugal impeller includes a front plate, a rear plate, and blades disposed between the front plate and the rear plate, wherein the blades are any of the centrifugal impeller blades described above.

[0012] Preferably, both the outer edge of the front disc and the outer edge of the rear disc are provided with a first reinforcing ring. The first reinforcing ring is generated by conformal scanning of the outer circle of the front disc or the rear disc, and the first reinforcing ring is integrally formed with the front disc or the rear disc.

[0013] Preferably, a second reinforcing ring is provided in the middle of the rear disc, and the second reinforcing ring is integrally formed with the rear disc.

[0014] Preferably, an arch bridge structure is provided between two adjacent blade bodies, and the arch bridge structure is opened along the airflow direction of the front plate.

[0015] Preferably, the area of ​​the arch bridge structure is 40%-90% of the area between two adjacent blade bodies.

[0016] Preferably, the height of the upper arch of the arch bridge structure is in the range of 1mm-10mm.

[0017] Preferably, the ratio of the arch length of the arch structure to the distance between the air outlets of two adjacent blade bodies is in the range of 0.3-0.95.

[0018] A fan includes a centrifugal impeller, wherein the centrifugal impeller is any of the centrifugal impellers described above.

[0019] The centrifugal impeller blades provided by this utility model increase airflow guidance and flow through the inverted arc surface structure on the suction side of the blade leading edge, thereby increasing air volume, reducing noise from vortex gas collisions and flow loss, improving efficiency, and reducing noise; the rounded structure on the pressure side of the blade leading edge allows airflow to enter the flow channel more smoothly, increasing the intake air volume, improving efficiency, and reducing noise from airflow collisions.

[0020] The further solutions provided in this application can also achieve at least one of the following beneficial technical effects:

[0021] The centrifugal impeller provided by this utility model utilizes a first reinforcing ring and a second reinforcing ring to effectively enhance the strength of the centrifugal impeller and reduce deformation;

[0022] The centrifugal impeller provided by this utility model, with the help of the arch bridge structure, can further increase the outlet area of ​​the centrifugal impeller, thereby increasing the air intake volume, improving the fan efficiency, and reducing the noise of airflow collision. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the blade structure in this embodiment;

[0025] Figure 2 This is a schematic diagram of the centrifugal impeller structure in this embodiment;

[0026] Figure 3 This is a schematic diagram showing the installation position of the reinforcing ring in this embodiment;

[0027] Figure 4 This is a side sectional view of the centrifugal impeller in this embodiment;

[0028] Figure 5 This is a top view of the centrifugal fan in this embodiment;

[0029] Figure 6 This is a side view of the centrifugal impeller in this embodiment;

[0030] Figure 7 This is a schematic diagram of the fan structure in this embodiment;

[0031] Figure 8 This is a schematic diagram of the gas flow direction on the side of the fan in this embodiment;

[0032] Figure 9 This is a schematic diagram of the forward gas flow direction of the fan in this embodiment.

[0033] Figures 1-9 In the accompanying drawings, the reference numerals include:

[0034] 1. Blade body; 11. Inverted arc surface structure; 12. Rounded structure; 13. Suction surface; 14. Pressure surface;

[0035] 2. Front plate; 3. Rear plate; 4. First reinforcing ring; 5. Second reinforcing ring; 6. Arch bridge structure; 7. Motor. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar words used in this utility model do not indicate any order, quantity, or importance. Terms such as "connection" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship can also change accordingly. Embodiments of this application disclose a centrifugal fan blade, a centrifugal fan, and a fan.

[0038] The core of this utility model is to provide a blade for a centrifugal impeller, a centrifugal impeller, and a fan.

[0039] Please refer to Figure 1 .

[0040] The centrifugal impeller blade provided by this utility model includes a blade body 1, the blade body 1 has an arc-shaped structure 11 on the leading edge suction surface 13 side, and a rounded structure 12 on the leading edge pressure surface 14 side.

[0041] Specifically, the blade body 1 of the centrifugal impeller blade has a chamfered surface structure 11 on the leading edge suction surface 13 side (e.g., Figure 1 As shown, a rounded structure 12 is provided on the leading edge pressure surface 14 side (i.e., at the leading edge suction surface 13, there is a rounded surface). Figure 1 As shown, the rounded corner at the leading edge pressure surface 14 increases airflow guidance and flow, and the rounded structure 12 makes the airflow enter the flow channel more smoothly, thereby increasing the air intake volume, improving efficiency, reducing the noise of airflow collision, and reducing the noise and flow loss of vortex gas collision.

[0042] The centrifugal impeller blades described above, by incorporating an arc-shaped surface structure 11 and a rounded structure 12 on the blade body 1, enable the blades to guide and process airflow more efficiently during operation. Compared to traditional blade structures, the blades in this embodiment can significantly increase the air intake volume, improve the working efficiency of the fan, and reduce the noise generated by the collision of airflows. This effectively solves the problems of poor air intake performance and high noise in existing blades, and effectively improves and enhances the existing centrifugal impeller blade technology.

[0043] The centrifugal impeller blades provided by this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0044] In one specific implementation, reference is made to... Figure 2The upper part of the blade body 1 is positioned away from the axis in the direction close to the front disc 2, while the lower part of the blade body 1 is positioned towards the axis in the direction close to the rear disc 3, with the distance gradually decreasing.

[0045] Specifically, the leading edge of the blade body 1 is cut off by a large arc, the upper part of the blade body 1 is set away from the axis in the direction close to the front disk 2, and the lower part of the blade body 1 is set away from the axis in the direction close to the rear disk 3. The large arc surface can better increase the pre-guidance of the airflow.

[0046] It should be noted that the blade body 1 is the main part that makes up the entire blade. It is usually made of metal materials, such as aluminum alloy or stainless steel, which have good strength and corrosion resistance.

[0047] In some other embodiments, the inverted arc surface structure 11 may also adopt a gradually changing arc design, adjusting the curvature of the arc according to different parts of the blade and the actual airflow conditions to achieve a better airflow guidance effect.

[0048] In practical applications, the radius of the rounded structure 12 can be adjusted according to the specific size of the blade and the operating conditions. Alternatively, the rounded structure 12 can also adopt an elliptical or other curved chamfer design, as long as it allows for a smooth airflow transition.

[0049] The implementation principle of a centrifugal wind turbine blade according to an embodiment of this application is as follows: by setting an inverted arc surface structure 11 and an inverted round structure 12 on the blade body 1, and by reasonably adjusting the layout of the blade body 1, the blade can guide and handle airflow more efficiently during operation. Compared with traditional blade structures, the blade of this embodiment can significantly increase the air intake volume, improve the working efficiency of the fan, and reduce the noise generated by the collision of airflows. It effectively solves the problems of poor air intake performance and high noise in the prior art, and effectively improves and enhances the existing centrifugal wind turbine blade technology.

[0050] Please refer to Figure 2 .

[0051] The centrifugal impeller provided by this utility model includes a front plate 2, a rear plate 3, and blades disposed between the front plate 2 and the rear plate 3. The blades are the centrifugal impeller blades mentioned above.

[0052] The centrifugal impeller provided by this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0053] Based on any of the above embodiments, refer to Figure 3 The outer edge of the front disc 2 and the outer edge of the rear disc 3 are provided with a first reinforcing ring 4. The first reinforcing ring 4 is generated by scanning the outer circle of the front disc 2 or the rear disc 3 in a conformal manner. The first reinforcing ring 4 is integrally formed with the front disc 2 or the rear disc 3.

[0054] Specifically, the outer edges of the front disc 2 and the rear disc 3 are integrally formed with a first reinforcing ring 4 by conformal scanning of the outer circle of the front disc 2 or the rear disc 3. This reinforcing ring is distributed at the outer edge of the front disc 2 and the rear disc 3, which enhances the overall strength of the front disc 2 and the rear disc 3 and can effectively reduce the deformation of the centrifugal impeller.

[0055] Based on any of the above embodiments, refer to Figure 3 and Figure 4 A second reinforcing ring 5 is provided in the middle of the rear disc 3, and the second reinforcing ring 5 is integrally formed with the rear disc 3.

[0056] Specifically, based on the first reinforcing ring 4 mentioned above, a second reinforcing ring 5 is provided in the middle of the rear plate 3 to cooperate with the first reinforcing ring 4. Similarly, the second reinforcing ring 5 is also integrally formed with the rear plate 3, which can strengthen the overall structure of the rear plate 3. Since the second reinforcing ring 5 is closely connected with the rear plate 3 to form a whole, it can improve the rear plate 3's resistance to deformation during the operation of the wind turbine, thereby enhancing the strength of the centrifugal wind turbine and reducing the deformation of the wind turbine due to external forces or high-speed operation.

[0057] In some alternative solutions, the first reinforcing ring 4 and the second reinforcing ring 5 can also be connected to the front disc 2 or the rear disc 3 by welding or bolting, but the one-piece molding method has obvious advantages in terms of strength and stability.

[0058] In one specific embodiment provided in this application, such as Figure 5 and Figure 6 As shown, an arch bridge structure 6 is provided between two adjacent blade bodies 1, and the arch bridge structure 6 is opened along the airflow direction of the front plate 2.

[0059] Specifically, an arch bridge structure 6 is provided between two adjacent blade bodies 1, along the airflow direction of the front plate 2. When airflow passes through the centrifugal impeller, the arch bridge structure 6 increases the outlet area of ​​the airflow, allowing more airflow to flow out smoothly, thereby increasing the intake air volume. Because the airflow can flow more smoothly, the collision between airflows is reduced, thus improving the efficiency of the centrifugal impeller and reducing the noise generated by airflow collisions.

[0060] Furthermore, the area of ​​the arch bridge structure 6 is 40%-90% of the area between two adjacent blade bodies 1.

[0061] Specifically, the area of ​​arch bridge structure 6 is... Figure 6The area enclosed by the arc-shaped dotted line. Setting the area of ​​the arch bridge structure 6 to 40%-90% of the area between two adjacent blade bodies 1 can increase the outlet area, allowing more airflow to flow out smoothly, thereby increasing the intake volume, improving fan efficiency, and reducing noise from airflow collisions.

[0062] Preferably, the area of ​​the arch bridge structure 6 is 50%-85% of the area between two adjacent blade bodies 1.

[0063] Based on any of the above embodiments, refer to Figure 6 The height of the upper arch of the arch bridge structure 6 ranges from 1mm to 10mm.

[0064] Specifically, the height of the upper arch of arch bridge structure 6 is Figure 6 The height H in the figure ranges from 1mm to 10mm. By adjusting the height H, the outlet area can be increased, thereby increasing the air intake volume, improving efficiency, and reducing noise from airflow collisions.

[0065] Preferably, the optimal range for the upper arch height of the arch bridge structure 6 is between 1.5mm and 8mm.

[0066] Based on any of the above embodiments, refer to Figure 6 The ratio of the length of the arch bridge structure 6 to the distance between the air outlets of the two adjacent blade bodies 1 ranges from 0.3 to 0.95.

[0067] Specifically, the arch length of the arch structure 6 is L1, the distance between the air outlets of two adjacent blade bodies 1 is L, and the ratio of L1 / L is in the range of 0.3-0.95. This can effectively increase the outlet area, allow more airflow to flow out smoothly, thereby increasing the air intake volume, improving the fan efficiency, and reducing the noise generated by the collision of airflows.

[0068] Preferably, the optimal ratio of the arch length of the arch structure 6 to the distance between the air outlets of two adjacent blade bodies 1 is 0.4-0.9.

[0069] It should be noted that the arch bridge structure 6 described above is an arc-shaped structure. In other embodiments, the shape of the arch bridge structure 6 can be adjusted according to the simulation analysis results of airflow to make it more in line with the flow law of airflow.

[0070] The implementation principle of a centrifugal impeller in this application embodiment is as follows: by setting a reinforcing ring and an arch bridge structure 6 on the centrifugal impeller, the problems of low strength, easy deformation, low air volume, low efficiency, and high noise of existing centrifugal impellers are solved. The reinforcing ring enhances the structural stability of the impeller, enabling it to withstand greater centrifugal force and airflow pressure; the design of the arch bridge structure 6 improves the airflow, increases the air outlet area, and improves the working efficiency and performance of the fan. This design considers both the structural mechanical characteristics of the impeller and the principles of airflow dynamics, representing a comprehensive and innovative design that comprehensively improves and optimizes existing centrifugal impeller technology.

[0071] Please refer to Figure 7 .

[0072] The fan provided by this utility model includes the aforementioned centrifugal impeller and a motor 78 for driving the centrifugal impeller. For example... Figure 8 and Figure 9 As shown, this indicates the airflow direction of the fan.

[0073] Specifically, the casing of a blower is typically made of plastic or metal, serving to protect the internal centrifugal impeller and guide airflow. The shape and structure of the casing affect the overall performance of the blower. Generally, the inner wall of the casing should be smooth to reduce frictional losses in the airflow. In some alternative solutions, the casing can adopt a modular design for easy assembly and maintenance.

[0074] The centrifugal impeller is installed inside the fan casing and is driven to rotate by motor 7. Motor 7 is the power source for the fan, and it is typically a DC motor or an AC motor, selected according to different application scenarios and power requirements. The output shaft of motor 7 is connected to the central shaft of the centrifugal impeller, transmitting power to the impeller. During installation, it is essential to ensure the concentricity of motor 7 and the centrifugal impeller to reduce vibration and noise.

[0075] The operating principle of the fan provided in this embodiment is as follows: Due to the adoption of the aforementioned centrifugal impeller, the fan can utilize the high performance of the centrifugal impeller to achieve large-volume, high-efficiency air delivery during operation. Simultaneously, the low-noise design of the centrifugal impeller makes the entire fan quieter during operation. This type of fan overcomes the shortcomings of traditional fans, such as low air volume, low efficiency, and high noise.

[0076] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0077] The foregoing has provided a detailed description of the centrifugal impeller blades, centrifugal impeller, and fan provided by this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A blade for a centrifugal fan wheel, comprising a blade body (1), characterized in that, The blade body (1) is provided with a reverse arc structure (11) on the side of the leading edge suction surface (13), and is provided with a rounded structure (12) on the side of the leading edge pressure surface (14).

2. The blade for a centrifugal fan wheel according to claim 1, characterized by The upper part of the blade body (1) is arranged away from the axis in the direction close to the front disc (2), and the lower part of the blade body (1) is arranged towards the axis in the direction close to the rear disc (3), and the distance gradually decreases.

3. A centrifugal fan wheel comprising a front disc (2), a rear disc (3) and blades arranged between the front disc (2) and the rear disc (3), characterized in that The blade is the blade for the centrifugal fan wheel according to any one of claims 1-2.

4. The centrifugal fan wheel of claim 3, wherein An arch bridge structure (6) is arranged between the two adjacent blade bodies (1), and the arch bridge structure (6) is opened in the direction of the airflow out of the front disc (2).

5. The centrifugal fan wheel of claim 3, wherein The outer edge of the front disc (2) and the outer edge of the rear disc (3) are provided with a first reinforcing ring (4), the first reinforcing ring (4) is generated by the outer circle of the front disc (2) or the rear disc (3) conformal scanning, and the first reinforcing ring (4) is integrally formed with the front disc (2) or the rear disc (3).

6. The centrifugal fan wheel of claim 5, wherein A second reinforcing ring (5) is arranged in the middle of the rear disc (3), and the second reinforcing ring (5) is integrally formed with the rear disc (3).

7. The centrifugal fan wheel of claim 4 wherein, The area of the arch bridge structure (6) is 40%-90% of the area between the two adjacent blade bodies (1).

8. The centrifugal fan wheel of claim 4 wherein, The upper arch height of the arch bridge structure (6) ranges from 1mm to 10mm.

9. The centrifugal fan wheel of claim 4 wherein, The ratio of the arch bridge length of the arch bridge structure (6) to the distance between the air outlets of the two adjacent blade bodies (1) ranges from 0.3 to 0.

95.

10. A fan comprising a centrifugal impeller, characterised in that The centrifugal fan is the centrifugal fan according to any one of claims 3-9.

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