Efficient outer rotor fan air guide ring

Abstract

The utility model relates to the technical field of fans, and discloses an efficient outer rotor fan air guide ring which comprises a support module, the support module comprises an air guide ring, a guide vane hub and a plurality of rear guide vanes, and connecting blocks are further arranged at the joints of the rear guide vanes and the inner wall of the air guide ring. By means of the arrangement of the rear guide vane, airflow flowing out of the impeller can be accurately guided, redundant rotation components in the airflow are converted into axial flow, and turbulence of the airflow and energy loss are effectively reduced. By means of the well-designed shape and angle of the rear guide vane, airflow can pass more evenly and smoothly, and static pressure and efficiency of the fan are improved.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to a high-efficiency external rotor fan guide ring. Background Technology

[0002] A fan is a general-purpose mechanical device that converts mechanical energy into gas energy and enables the directional transport of gas. It is widely used in various fields such as industry, construction, agriculture, transportation, and energy. Based on their working principle, fans can be classified into positive displacement, turbine, and jet types; according to their application, they can be classified into industrial boiler fans, tunnel fans, and general exhaust fans; and according to the airflow direction, they can be classified into centrifugal fans, axial flow fans, and mixed flow fans. In the industrial field, fans are used for ventilation, dust removal, and cooling.

[0003] Most modern wind turbines lack a rear guide vane structure. When the wind turbine rotates, the airflow it absorbs is rotating, which generates a lot of turbulence inside the airflow, resulting in energy loss and reduced wind turbine efficiency. Moreover, wind turbines with a rear guide vane structure require a core-pulling structure to be designed in the mold during the molding process, which increases the design cost. After molding, the core-pulling parts still need to be cut off, resulting in waste of raw materials. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides a high-efficiency external rotor fan guide ring, which has the advantages of increasing the fan's air output efficiency and reducing mold forming design costs.

[0005] To achieve the above-mentioned goals of increasing the air output efficiency of the fan and reducing the mold forming design cost, this utility model provides the following technical solution: it includes a support module, which includes an air guide ring, a guide vane hub and a rear guide vane. Several rear guide vanes are provided, and a connecting block is also provided at the connection between the rear guide vane and the inner wall of the air guide ring.

[0006] Preferably, the connecting block is a diffusion rib.

[0007] Preferably, the guide vane hub is located at the center of the air guide ring, the guide vane hub is connected to the inner wall of the air guide ring through the rear guide vane, the motor module is installed in the guide vane hub, the rear guide vanes are all circumferentially and evenly distributed on the outer peripheral side of the guide vane hub, and the rear guide vanes are distributed in a clockwise oblique direction.

[0008] Preferably, at least two heat dissipation holes are provided on the side end face of the guide vane hub, and a cavity is provided on the other side of the guide vane hub, with a number of damping strips provided inside the cavity.

[0009] Preferably, the connection between the rear guide vane and the air guide ring is a movable connection, and the connection is a movable adjusting block.

[0010] Preferably, the two inner rings of the air guide ring are respectively provided with an air inlet cutout and a diffuser cutout, the air inlet cutout is provided with an arc surface, and the diffuser cutout is provided with an inclined surface, and the outer periphery of the air guide ring is further fixedly provided with a reinforcing rib.

[0011] Compared with the prior art, the high-efficiency outer rotor fan air guide ring has the following beneficial effects:

[0012] 1. The high-efficiency outer rotor fan air guide ring is provided with a diffusion rib, which can strengthen the connection strength between the rear guide vane and the side wall of the air guide ring and increase the service life, and can facilitate mold opening; after adding this structure, the mold forming the structure does not need to be designed to have a core-pulling structure, only needs to have a conventional opening and closing structure, and the cost can be significantly reduced.

[0013] 2. The high-efficiency outer rotor fan air guide ring is provided with a rear guide vane, which can accurately guide the airflow out of the impeller, convert the excess rotational component in the airflow into axial flow, and effectively reduce the turbulence and energy loss of the airflow. Through careful design of the shape and angle of the rear guide vane, the airflow can be more uniform and smooth, and the static pressure and efficiency of the fan can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure schematic view of the air guide ring of the utility model;

[0015] Figure 2 It is a structure schematic view of the diffuser cutout of the utility model;

[0016] Figure 3 It is a structure schematic view of the diffusion rib of the utility model;

[0017] Figure 4 It is a structure schematic view of the air guide ring wire gap of the utility model;

[0018] Figure 5 It is a structure schematic view of the air guide ring bottom reinforcing structure of the utility model;

[0019] Figure 6 It is a structure schematic view of the sectional view of the rear guide vane with different diameters of the utility model.

[0020] In the drawing: 10, air guide ring; 101, air inlet cutout; 102, diffuser cutout; 103, reinforcing rib; 20, guide vane hub; 201, rear guide vane; 2011, diffusion rib; 202, heat dissipation hole. DETAILED DESCRIPTION

[0021] 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. Example 1

[0022] like Figure 1 As shown, the fan includes a support module, which comprises an air guide ring 10, a guide vane hub 20, and a rear guide vane 201. The guide vane hub 20 is located at the center of the air guide ring 10 and is connected to the inner wall of the air guide ring 10 via the rear guide vane 201. The motor module is installed inside the guide vane hub 20. The inner rings on both sides of the air guide ring 10 have an air inlet 101 and a diffuser 102, respectively. The air inlet 101 is an arc-shaped surface, and the diffuser 102 is a beveled surface. Reinforcing ribs 103 are also fixedly installed on the outer periphery of the air guide ring 10. The air inlet 101 effectively reduces the length and width dimensions of the fan without affecting its ventilation performance, achieving a compact design. Figure 2 As shown, the diffusion angle of the diffuser 102 is α, which ranges from 3° to 15°, and the height of the diffuser is H, where 10≦H≦200mm. In this application, α is 11° and the height is 50mm. The diffuser 102 is designed so that when the airflow enters the diffuser 102 after being accelerated by the impeller and the rear guide vanes, the airflow speed decreases due to the gradual increase in the cross-sectional area of ​​the diffuser 102. According to the principle of energy conversion, the kinetic energy of the airflow is converted into pressure energy, thereby increasing the static pressure of the fan and enabling the air to be transported to a greater distance.

[0023] Several rear guide vanes 201 are provided, all circumferentially and evenly distributed on the outer periphery of the guide vane hub 20. The rear guide vanes 201 are distributed obliquely in a clockwise direction, while the impeller rotates counterclockwise. This arrangement of the rear guide vanes 201 precisely guides the airflow exiting the impeller, converting excess rotational components into axial flow, effectively reducing airflow turbulence and energy loss. Through carefully designed rear guide vane shape and angle, airflow can pass more evenly and smoothly, improving the fan's static pressure and efficiency, and increasing the ventilation efficiency of the guide vane ring by 10%-15%.

[0024] like Figure 6As shown, the center of the middle hole of the air guide ring is taken as the center of a circle, and columnar curved surfaces of Φ200, Φ250, Φ300, Φ350, Φ400 and Φ450 are established, which respectively intersect with the rear guide vane of the air guide ring, a line segment is made from the bottom to the top center of the intersecting section, the left point of the line segment is taken as an end point to make a ray to the right, the included angle between the ray and the line segment is γ, 40≦γ≦80, and the length of the line segment is c, 15≦c≦80.

[0025] In the present application, the cross section at Φ200 is γ=67 degrees and c=26.1 mm, the cross section at Φ250 is γ=62 degrees and c=26.4 mm, the cross section at Φ300 is γ=59 degrees and c=26.9 mm, the cross section at Φ350 is γ=57 degrees and c=26.4 mm, the cross section at Φ400 is γ=55 degrees and c=26.0 mm, and the cross section at Φ450 is γ=51 degrees and c=25.1 mm.

[0026] The connecting part between the rear guide vane 201 and the inner wall of the air guide ring 10 is also provided with diffusion ribs 2011, as shown in Figure 3 As shown, the diffusion ribs 2011 are provided to strengthen the connecting strength between the rear guide vane and the side wall of the air guide ring, and to increase the service life. On the other hand, the diffusion ribs 2011 are provided to facilitate mold opening. If the air guide ring does not have this reinforcing structure, the mold needs to have an additional core-pulling structure, and the cost will increase significantly. Conversely, after adding this structure, the mold forming the structure does not need to be designed with a core-pulling structure, but only needs to be designed with a conventional opening and closing structure, and the cost will decrease significantly.

[0027] The air guide ring 10 is also provided with a notch, and a wire is installed in the notch, as shown in Figure 4 As shown, the notch is reserved in the side wall, the width of the notch is a, 5≦a≦12, the depth of the notch is b, 5≦b≦100, and the angle of the notch is β, 10≦β≦80. In the present application, a=8, b=42 and β=45, and the notch extends to the bottom on the left. The advantage of this structure is that the motor lead with a terminal can be directly installed on the air guide ring. Compared with the traditional wire passing hole, the notch can avoid the problem that the traditional hole penetrates the fan and is too large to weaken the effect of the diffuser, causing leakage and air leakage at this position.

[0028] The bottom outer periphery side of the air guide ring 10 is also provided with a reinforcing structure, and the reinforcing structure is a plurality of curved lines arranged in a staggered manner, as shown in Figure 5 As shown, the curved change trajectory of the bottom reinforcing structure meets the condition that the distance SDn between the scanning section and the scanning trajectory is A+B*sin(n*360*trajpar).

[0029] Wherein: A is the basic distance;

[0030] B is the amplitude;

[0031] n is the cycle period;

[0032] trajpar refers to the value of the system variable 0~1.

[0033] This application: SD1=0+21*sin(trajpar*360*1.5), SD1=0-21*sin(trajpar*360*1.5)

[0034] The bottom reinforcing structure can improve the stability of the air guide ring during installation and fixation. During use, the air guide ring needs to bear its own weight, vibration during operation of the fan, and the action force of the airflow. The bottom reinforcing structure can disperse these action forces, prevent the air guide ring from deforming or loosening on the installation surface, and ensure that it is tightly combined with the installation base. This not only ensures the safety of the fan operation, but also reduces noise and performance degradation problems caused by unstable installation, prolongs the service life of the air guide ring and the fan, and provides more reliable ventilation equipment for users.

[0035] The guide vane hub 20 side end face is also provided with at least two heat dissipation holes 202, and the other side of the guide vane hub 20 is provided with a cavity, and a plurality of shock absorption strips are arranged in the cavity. When the motor is installed, the motor can be effectively damped, prolonging the service life of the fan. Example 2

[0036] The connection between the rear guide vane 201 and the air guide ring 10 can also be a movable connection, and the connection is a movable adjusting block. The rear guide vane 201 has a small elasticity, so the degree of twisting of the rear guide vane 201 can be adjusted through the movable adjusting block. In this way, when different impellers are replaced, the angle of the rear guide vane can be adjusted according to the needs, so that the airflow of the fan always remains axial movement.

[0037] In summary, the high-efficiency outer rotor fan air guide ring, through the setting of the diffusion rib 2011, on the one hand, it is to strengthen the connection strength between the rear guide vane and the side wall of the air guide ring, and increase the service life; on the other hand, it is to facilitate mold opening. If the structure is formed on the mold, it does not need to design a core-pulling structure, only a conventional opening and closing structure is needed, and the cost will be significantly reduced. The setting of the rear guide vane 201 can accurately guide the airflow out of the impeller, convert the excess rotational component in the airflow into axial flow, and effectively reduce the turbulence and energy loss of the airflow. Through careful design of the shape and angle of the rear guide vane, the airflow can be more uniform and smooth, improving the static pressure and efficiency of the fan.

[0038] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0039] While the embodiments of the present application have been shown and described with respect to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. Therefore, the scope of the application should not be limited by the embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims

1. A high-efficiency outer-rotor fan air guide ring, comprising a support module, characterized in that: the support module comprises an air guide ring (10), a guide vane hub (20), and rear guide vanes (201), wherein the rear guide vanes (201) are provided in plurality, and a connecting block is further provided at the connecting part between the rear guide vanes (201) and the inner wall of the air guide ring (10).

2. The high efficiency outer rotor fan air guide ring of claim 1, wherein: The connecting block is a diffusion rib (2011).

3. The high efficiency outer rotor fan air guide ring of claim 1, wherein: The guide vane hub (20) is arranged at the center of the air guide ring (10), the guide vane hub (20) is connected to the inner wall of the air guide ring (10) through the rear guide vanes (201), a motor module is installed in the guide vane hub (20), the rear guide vanes (201) are uniformly distributed on the outer circumferential side of the guide vane hub (20) in a clockwise and oblique manner.

4. The high efficiency outer rotor fan wind ring of claim 1, wherein: At least two heat dissipation holes (202) are further arranged on the side end face of the guide vane hub (20), the other side of the guide vane hub (20) is provided with a cavity, and a plurality of shock-absorbing strips are arranged inside the cavity.

5. The high efficiency outer rotor fan wind ring of claim 1, wherein: The connecting part between the rear guide vanes (201) and the air guide ring (10) is a movable connection, and the connecting part is a movable adjusting block.

6. The high efficiency outer rotor fan wind ring of claim 1, wherein: The inner ring of the air guide ring (10) on both sides is respectively an air inlet cutout (101) and a diffuser port (102), wherein the air inlet cutout (101) is provided in an arc shape, the diffuser port (102) is provided in an inclined surface, and a reinforcing rib (103) is further fixedly installed on the outer circumferential side of the air guide ring (10).

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