Compact efficient axial flow fan
By introducing an axial rectifier surface and a conical guide surface into the axial flow fan, combining the rectifier and rectifier to optimize the flow channel structure, the problem of increasing loss of cyclone gas at the outlet is solved, and efficient uniform airflow discharge and air volume increase is achieved.
Patent Information
- Application Number
- CN202422416591.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The existing axial flow fans cannot effectively rectify the cyclone gas in a limited space, resulting in increased losses at the outlet, the center of the airflow is hollow, and the wind speed does not meet the standard.
A compact and efficient axial flow fan is designed, using an axial rectifier and a conical guide surface combined with a rectifier and a rectifier to optimize the flow structure, eliminate the influence of swirl flow, and improve the uniformity and regularity of the airflow.
Improve fan efficiency in a narrow space, increase air output, reduce drag, achieve uniform airflow discharge, and improve air volume performance of more than 20%.
Smart Images
Figure CN223075795U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of axial flow fans, in particular to a compact and efficient axial flow fan. Background Art
[0002] With the continuous increase of the power of wind turbines, in order to meet a greater cooling power, a greater cooling air volume is required; at the same time, in order to reduce costs, the original dimensions, especially the key interface dimensions, will be maintained as much as possible during the design of wind turbines. This requires designing an axial flow fan with higher performance within a limited space.
[0003] The generally used axial flow fans on the market often require the shapes and areas at the air inlet and outlet to be consistent with, or even larger than, the impeller working area, so as to ensure as high an efficiency as possible; however, in the actual application process, due to the limitations of the interfaces and space, this requirement cannot be met; therefore, it is necessary to change the structure and optimize the flow path within a limited space to achieve the purpose of improving the fan efficiency.
[0004] However, since the gas coming out of the axial flow impeller has swirl, during the movement of the swirl, it directly reaches the system outlet without undergoing a rectifying effect, and the system outlet size is much smaller than the impeller itself size, resulting in that the swirl air flow at the outlet has to undergo a 180° axial direction change and also change the circumferential swirl direction. The two are superimposed at the outlet, leading to a sharp increase in the loss at the outlet. Thirdly, the air flow coming out of the axial flow impeller has no regular flow and a large frictional resistance along the way, and the center of the air flow is hollow, failing to meet the wind speed requirement. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a compact and efficient axial flow fan, aiming to solve the technical problems in the prior art that since the gas coming out of the axial flow impeller has swirl, during the movement of the swirl, it directly reaches the system outlet without undergoing a rectifying effect, and the system outlet size is much smaller than the impeller itself size, resulting in that the swirl air flow at the outlet has to undergo a 180° axial direction change and also change the circumferential swirl direction. The two are superimposed at the outlet, leading to a sharp increase in the loss at the outlet. Thirdly, the air flow coming out of the axial flow impeller has no regular flow and a large frictional resistance along the way, and the center of the air flow is hollow, failing to meet the wind speed requirement.
[0006] To achieve the above object, a compact and efficient axial flow fan adopted by the present utility model comprises a wind cylinder and a transition cylinder. A fixing frame is arranged in the wind cylinder and fixed by bolts. An electric motor is arranged above the fixing frame by bolts. An impeller is arranged at the output end of the electric motor by bolts. A junction box is arranged below the wind cylinder by screws. The outlet end of the transition cylinder has an axial rectifying surface and a conical guiding surface, and the conical guiding surface is located behind the axial rectifying surface. A rectifier and a plurality of rectifying fins are arranged in the transition cylinder, and the plurality of rectifying fins are respectively located outside the rectifier. The wind cylinder is connected to the transition cylinder by bolts and is located at one end of the transition cylinder.
[0007] Wherein, a rain shield is arranged at one end of the transition cylinder away from the wind cylinder, and the rain shield is connected to the transition cylinder by bolts.
[0008] Wherein, the angle of the fixing frame is the same as that of the rectifying fins.
[0009] Wherein, a first mesh cover is arranged at one end of the rain shield away from the transition cylinder, and the first mesh cover is connected to the rain shield by bolts.
[0010] Wherein, a second mesh cover is arranged at one end of the wind cylinder away from the transition cylinder, and the second mesh cover is connected to the wind cylinder by bolts.
[0011] A compact and efficient axial flow fan of the present utility model comprises a wind cylinder and a transition cylinder. A fixing frame is arranged in the wind cylinder and fixed by bolts. An electric motor is arranged above the fixing frame by bolts. An impeller is arranged at the output end of the electric motor by bolts. A junction box is arranged below the wind cylinder by screws. The outlet end of the transition cylinder has an axial rectifying surface and a conical guiding surface, and the conical guiding surface is located behind the axial rectifying surface. A rectifier and a plurality of rectifying fins are arranged in the transition cylinder, and the plurality of rectifying fins are respectively located outside the rectifier. The wind cylinder is connected to the transition cylinder by bolts and is located at one end of the transition cylinder. This design can work in a narrow space, provide sufficient air volume for the cooler, add a rectifying device, and on the premise of the same configuration, reduce the wind resistance of the air flow passing through the transition cylinder, make the air flow uniform and regular, and be more efficient. The space utilization rate is higher. During the test, the air output becomes larger, saving costs. Description of the Drawings
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0013] Figure 1 It is the front view of the compact and efficient axial flow fan of the present utility model.
[0014] Figure 2 It is the side view of the compact and efficient axial flow fan of the present utility model.
[0015] Figure 3 It is the bottom view of the compact and efficient axial flow fan of the present utility model.
[0016] Figure 4 It is the schematic structural view of the rain shield in the compact and efficient axial flow fan of the present utility model.
[0017] Figure 5 It is the schematic structural view of the adapter tube in the compact and efficient axial flow fan of the present utility model.
[0018] Figure 6 It is the schematic structural view of the motor in the compact and efficient axial flow fan of the present utility model.
[0019] Figure 7 It is the schematic structural view of the impeller in the compact and efficient axial flow fan of the present utility model.
[0020] Figure 8 It is the schematic structural view of the first wire mesh cover and the second wire mesh cover in the compact and efficient axial flow fan of the present utility model.
[0021] Figure 9 It is the schematic structural view of the air duct in the compact and efficient axial flow fan of the present utility model.
[0022] Figure 10 It is the schematic structural view of the junction box in the compact and efficient axial flow fan of the present utility model.
[0023] Figure 11 It is the three-dimensional perspective view of the adapter tube in the compact and efficient axial flow fan of the present utility model.
[0024] 1 - Rain shield, 2 - Adapter tube, 3 - Motor, 4 - Impeller, 5 - Second wire mesh cover, 6 - Air duct, 7 - Junction box, 8 - Fixed bracket, 9 - Axial rectifying surface, 10 - Conical guiding surface, 11 - First wire mesh cover, 12 - Rectifying fin, 13 - Rectifier. Detailed implementation manners
[0025] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.
[0026] Please refer to Figures 1 to 11 , the present utility model provides a compact and efficient axial flow fan, including a wind cylinder 6 and an adapter cylinder 2. A fixing frame 8 is arranged in the wind cylinder 6 through bolts. An electric motor 3 is arranged above the fixing frame 8 through bolts. An impeller 4 is arranged at the output end of the electric motor 3 through bolts. A junction box 7 is arranged below the wind cylinder 6 through screws. The outlet end of the adapter cylinder 2 has an axial rectifying surface 9 and a conical guiding surface 10, and the conical guiding surface 10 is located behind the axial rectifying surface 9. A rectifier 13 and a plurality of rectifying fins 12 are arranged in the adapter cylinder 2, and the plurality of rectifying fins 12 are respectively located outside the rectifier 13. The wind cylinder 6 is connected to the adapter cylinder 2 through bolts and is located at one end of the adapter cylinder 2.
[0027] In this embodiment, by arranging the axial rectifying surface 9 and the conical guiding surface 10 at the outlet end of the adapter cylinder 2, and the axial rectifying surface 9 is also arranged in a conical shape at the large aperture of the adapter cylinder 2 and corresponds to the outer adapter cylinder 2, the local resistance is reduced, the air flow smoothly transitions to the small aperture, and the air flow loss is reduced.
[0028] Furthermore, a rain shield 1 is arranged at one end of the adapter cylinder 2 away from the wind cylinder 6, and the rain shield 1 is connected to the adapter cylinder 2 through bolts.
[0029] In this embodiment, most of the rain can be blocked by the rain shield 1.
[0030] Furthermore, the angle of the fixing frame 8 is the same as the angle of the rectifying fins 12.
[0031] In this embodiment, by increasing the rectifying fins 12, the air flow is no longer chaotic, the influence of the swirling flow is eliminated, and the fixing frame 8 is designed to have the same angle as the rectifying fins 12 to further eliminate the influence of the swirling flow.
[0032] Furthermore, a first wire mesh cover 11 is arranged at one end of the rain shield 1 away from the adapter cylinder 2, and the first wire mesh cover 11 is connected to the rain shield 1 through bolts.
[0033] Furthermore, a second wire mesh cover 5 is arranged at one end of the wind cylinder 6 away from the adapter cylinder 2, and the second wire mesh cover 5 is connected to the wind cylinder 6 through bolts.
[0034] In this embodiment, the dust-proof ability of the device can be improved by the first wire mesh cover 11 and the second wire mesh cover 5, and the structures of the first wire mesh cover and the second wire mesh cover are the same.
[0035] In this embodiment, through the design of the axial rectifying surface 9, the swirling influence of the air flow can be gradually eliminated during the forward flow process, and the design of the conical guiding surface 10 gradually transitions from the large diameter of the impeller 4 to the small diameter of the outlet. At the same time, through fluid simulation calculation, the shapes and position coordination of the outer conical wall and the internal guiding cone are reasonably designed, so as to achieve a gradual and smooth transition of the air flow to the outlet, prevent a sharp change in the streamline at the outlet, and achieve the purpose of reducing resistance and improving the fan efficiency.
[0036] In this embodiment, through experimental comparison, the performance of the compact and efficient axial flow fan designed according to this design is improved by more than 20% compared with the conventional design; the air volume of the original fan can only reach 13,000 m 3 / h, and after the transformation of the fan, the air volume can reach 16,000 m 3 / h, and the effect is obvious.
[0037] In this embodiment, the design can also greatly make the air flow no longer chaotic by increasing the number of the rectifying fins 12, and further eliminate the swirling influence; at the same time, the rectifying fins 12 can be replaced with a grid of cross-shaped grids to eliminate the swirling.
[0038] The above-disclosed is only a preferred embodiment of the present invention, and of course, it cannot be used to limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.
Claims
1. A compact and efficient axial flow fan, characterized in that it includes a wind cylinder and a transition cylinder. A bolt fixing frame is arranged inside the wind cylinder. Above the fixing frame, a motor is arranged through bolts. The output end of the motor is provided with an impeller through bolts. A junction box is arranged below the wind cylinder through screws. The outlet end of the transition cylinder has an axial rectifying surface and a conical guiding surface, and the conical guiding surface is located behind the axial rectifying surface. A rectifier and a plurality of rectifying fins are arranged inside the transition cylinder, and the plurality of rectifying fins are respectively located outside the rectifier. The wind cylinder is connected to the transition cylinder through bolts and is located at one end of the transition cylinder.
2. The compact and efficient axial flow fan according to claim 1, characterized in that a rain shield is arranged at one end of the transition cylinder away from the wind cylinder, and the rain shield is connected to the transition cylinder through bolts.
3. The compact and efficient axial flow fan according to claim 2, characterized in that the angle of the fixing frame is the same as the angle of the rectifying fins.
4. The compact and efficient axial flow fan according to claim 3, characterized in that a first mesh cover is arranged at one end of the rain shield away from the transition cylinder, and the first mesh cover is connected to the rain shield through bolts.
5. The compact and efficient axial flow fan according to claim 4, characterized in that a second mesh cover is arranged at one end of the wind cylinder away from the transition cylinder, and the second mesh cover is connected to the wind cylinder through bolts.