Axial flow fan with adjustable fan blade angle

Abstract

The utility model relates to the technical field of axial flow fans, and discloses a fan blade angle adjustable axial flow fan which comprises a shell, a first supporting plate is fixedly connected to the inner wall of the shell, a motor is fixedly connected to the side wall of the first supporting plate, a connecting frame is fixedly connected to the output end of the motor, a rotating column is fixedly connected to the side wall of the connecting frame, and a fan blade is fixedly connected to the rotating column. A connecting disc is arranged on the inner wall of the connecting frame, and an adjusting assembly is arranged on the side wall of the connecting frame. And the adjusting assembly comprises a connecting column, one end of the connecting column is rotationally connected to the interior of the connecting disc, and the other end of the connecting column is fixedly connected with a fixing column. According to the fan, the fan blade plate is pulled, the fan blade plate drives the fixing column to rotate, the connecting plate is rotated on the fixing column, and the connecting plate drives the connecting rod, so that the effect of adjusting the angle of the fan blade plate is achieved, and the problem that the fixed fan blade angle cannot be adjusted according to the air volume or the environment change, and consequently the efficiency of the fan is low under the non-design working condition is solved; and the diversity of the axial flow fan with the adjustable fan blade angle is improved.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fan technology, and in particular to an axial flow fan with adjustable blade angle. Background Technology

[0002] In modern industrial production, ventilation, and numerous scenarios requiring airflow regulation, axial flow fans serve as crucial equipment, with their performance directly impacting overall operational efficiency. As demands for environmental adaptability, energy efficiency, and precise airflow control continue to rise across various sectors, developing axial flow fans with greater flexibility and adaptability has become an important direction for industry development.

[0003] Traditional axial flow fans typically employ a fixed hub and integrated blade design, with the blades mounted on the hub at a predetermined angle. The technical principle involves a motor driving the hub to rotate at high speed, which in turn causes the blades to propel air axially, thus achieving functions such as ventilation or gas transport.

[0004] However, this traditional axial flow fan has significant drawbacks. Because the blade angle is fixed, in practical applications, the fan cannot flexibly adjust its state when faced with changes in airflow, pressure requirements, or environmental conditions. For example, when there are significant differences between indoor and outdoor temperatures in different seasons, or when the ventilation demand in industrial production changes with process variations, axial flow fans with fixed blade angles can only maintain a predetermined operating mode and cannot make adaptive adjustments according to actual working conditions. This results in low operating efficiency under non-design conditions, failing to fully realize its intended function, wasting energy, and degrading overall performance. Therefore, an axial flow fan with adjustable blade angle is proposed to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an axial flow fan with adjustable blade angle, which aims to improve the problem in the prior art where the fixed blade angle cannot be adjusted according to changes in air volume, pressure or environment, resulting in low efficiency of the fan under non-design conditions.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An axial flow fan with adjustable blade angle includes a housing, a first support plate fixedly connected to the inner wall of the housing, a motor fixedly connected to the side wall of the first support plate, a connecting frame fixedly connected to the output end of the motor, a rotating column fixedly connected to the side wall of the connecting frame, a connecting plate provided on the inner wall of the connecting frame, and an adjustment component provided on the side wall of the connecting frame.

[0008] The adjustment assembly includes a connecting column, one end of which is rotatably connected to the inside of the connecting plate, and a fixed column fixedly connected to one end of the connecting column. A connecting plate is fixedly connected to the outer wall of the fixed column, and a connecting rod is rotatably connected to the side wall of the connecting plate. The other end of the connecting rod is rotatably connected to the side wall of another connecting plate. A fan blade is fixedly connected to the outer wall of the fixed column, and the side wall of the fan blade is rotatably connected to the inner wall of the outer shell. A support assembly is provided on the inner wall of the connecting frame.

[0009] As a further description of the above technical solution:

[0010] The support assembly includes a support plate, the side wall of which is fixedly connected to the inner wall of the connecting frame, and the side wall of the connecting frame is disposed on the side wall of the connecting column.

[0011] As a further description of the above technical solution:

[0012] A base is fixedly connected to the outer wall of the outer shell, and a connecting block is fixedly connected to the side wall of the base.

[0013] As a further description of the above technical solution:

[0014] The inner wall of the connecting block is slidably connected to a hollow column, and the inner wall of the hollow column is threadedly connected to a threaded column.

[0015] As a further description of the above technical solution:

[0016] A turntable is fixedly connected to one end of the threaded post, and a spring is provided at one end of the threaded post.

[0017] As a further description of the above technical solution:

[0018] One end of the spring is fixedly connected to one end of the threaded column, and the other end of the spring is fixedly connected to a trapezoidal column.

[0019] As a further description of the above technical solution:

[0020] The outer wall of the trapezoidal column is provided with a retaining ball, and the outer wall of the retaining ball is slidably connected to the inside of the hollow column.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by turning the fan blade plate, the fan blade plate drives the fixed column to rotate, and at the same time the fixed column rotates, the connecting plate rotates, and the connecting plate rotates, which in turn drives the connecting rod, thus achieving the effect of adjusting the angle of the fan blade plate. This solves the problem that the fixed fan blade angle cannot be adjusted according to changes in air volume, pressure or environment, resulting in low efficiency of the fan under non-design conditions, and improves the versatility of axial flow fans with adjustable fan blade angles.

[0023] 2. In this utility model, rotating the turntable drives the threaded column to rotate, the rotation of the threaded column drives the spring to contract, the contraction of the spring drives the trapezoidal column at the bottom to move, and at the same time the movement of the trapezoidal column will squeeze out the ball on the outer wall, achieving the effect of quick installation of the fan, solving the problem of complicated installation process, requiring more time and manpower, and increasing deployment costs, and improving the convenience of the axial flow fan with adjustable blade angle. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of an axial flow fan with adjustable blade angle proposed in this utility model.

[0025] Figure 2 This is a schematic diagram of the inner wall structure of the outer casing of an axial flow fan with adjustable blade angle proposed in this utility model.

[0026] Figure 3 This is a schematic diagram of the first support plate sidewall structure of an axial flow fan with adjustable blade angle proposed in this utility model.

[0027] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0028] Legend:

[0029] 1. Outer shell; 2. Base; 3. Connecting block; 4. Rotating column; 5. First support plate; 6. Motor; 7. Connecting plate; 8. Turntable; 9. Hollow column; 10. Threaded column; 11. Spring; 12. Trapezoidal column; 13. Ball clamp; 14. Connecting frame; 15. Connecting column; 16. Fixed column; 17. Fan blade plate; 18. Connecting plate; 19. Connecting rod; 20. Support plate. Detailed Implementation

[0030] 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.

[0031] Reference Figure 1 , Figure 2 and Figure 4This utility model provides an embodiment of an axial flow fan with adjustable blade angle, including a housing 1. The housing 1 is usually made of high-strength carbon steel, which has good mechanical strength and wear resistance. A first support plate 5 is fixedly connected to the inner wall of the housing 1. The first support plate 5 is generally made of aluminum alloy. Aluminum alloy is lightweight but has high strength, which can ensure stable support for internal components while reducing the weight of the entire fan. A motor 6 is fixedly connected to the side wall of the first support plate 5. A connecting frame 14 is fixedly connected to the output end of the motor 6. The connecting frame 14 is usually made of stainless steel. Stainless steel has excellent corrosion resistance and can maintain good performance in harsh environments such as humid environments. A rotating column 4 is fixedly connected to the side wall of the connecting frame 14. A connecting plate 7 is provided on the inner wall of the connecting frame 14. An adjustment component is provided on the side wall of the connecting frame 14.

[0032] The adjustment assembly includes a connecting column 15, which is generally made of copper alloy. Copper alloy has good wear reduction and wear resistance. During frequent rotation, one end of the connecting column 15 is rotatably connected to the inside of the connecting plate 7, and one end of the connecting column 15 is fixedly connected to a fixing column 16. A connecting plate 18 is fixedly connected to the outer wall of the fixing column 16. A connecting rod 19 is rotatably connected to the side wall of the connecting plate 18. The connecting rod 19 is usually made of aluminum alloy, which is lightweight and has high strength. The other end of the connecting rod 19 is rotatably connected to the side wall of another connecting plate 18. A fan blade 17 is fixedly connected to the outer wall of the fixing column 16. The fan blade 17 is generally made of carbon fiber composite material, which has high strength and low density. The side wall of the fan blade 17 is rotatably connected to the inner wall of the outer shell 1. A support assembly is provided on the inner wall of the connecting frame 14.

[0033] Specifically, when adjusting the fan blades, the fan is first paused, and then the fan blade plate 17 is directly moved. The rotation of the fan blade plate 17 causes the fixed column 16 to rotate, which in turn causes the connecting plate 18 on its outer wall to rotate. Simultaneously, the connecting rod 19 on its side wall is also moved and rotates accordingly. As the fixed column 16 rotates, the connecting column 15 at one end is moved and rotates on the outer wall of the connecting plate 7, thereby adjusting and limiting the angle of the fan blade plate 17. This simplifies the fan blade angle adjustment process, improves the convenience and accuracy of operation, and ensures the stability and reliability of the adjustment process, providing users with a more efficient fan performance optimization experience.

[0034] Reference Figure 1 and Figure 3The support assembly includes a support plate 20, whose sidewall is fixedly connected to the inner wall of the connecting frame 14. The sidewall of the connecting frame 14 is set on the sidewall of the connecting column 15. A base 2 is fixedly connected to the outer wall of the outer shell 1. A connecting block 3 is fixedly connected to the sidewall of the base 2. A hollow column 9 is slidably connected to the inner wall of the connecting block 3. A threaded column 10 is threadedly connected to the inner wall of the hollow column 9. The threaded column 10 is made of medium carbon steel. After appropriate heat treatment, medium carbon steel has high strength and good machinability, which can ensure the accuracy and strength of the thread. One end of the threaded column 10 is fixedly connected to the turntable 8. One end of the threaded column 10 is provided with a spring 11. One end of the spring 11 is fixedly connected to one end of the threaded column 10. The other end of the spring 11 is fixedly connected to a trapezoidal column 12. The trapezoidal column 12 is generally made of copper. Copper has good wear-reducing properties and can effectively reduce frictional resistance when moving in conjunction with other parts. The outer wall of the trapezoidal column 12 is provided with a ball 13. The ball 13 is made of stainless steel. Stainless steel has high hardness and good wear resistance. The outer wall of the ball 13 is slidably connected to the inside of the hollow column 9.

[0035] Specifically, when installing an axial flow fan with adjustable blade angle, the device is first placed in the pre-drilled hole, and then the turntable 8 is rotated. Under pressure, the turntable 8 drives the threaded column 10 at one end to rotate, and the rotation of the threaded column 10 further causes the spring 11 at one end to contract. During the contraction of the spring 11, the trapezoidal column 12 at one end is driven and slides within the inner wall of the hollow column 9. As the trapezoidal column 12 moves, the retaining ball 13 on its outer wall is driven and gradually contracts, eventually being pressed and firmly pressed against the inner wall of the hole, thus achieving rapid fan installation. Through a clever mechanical linkage structure, the installation steps are simplified, installation efficiency is improved, and the stability and reliability of the fan after installation are ensured, providing users with a more convenient operating experience.

[0036] Working principle: When installing an axial flow fan with adjustable blade angle, first place the device in the reserved hole, then rotate the turntable 8. The turntable 8 is driven by force to rotate the threaded column 10 at one end. Then, after the threaded column 10 rotates, it drives the spring 11 at one end and causes it to contract. At the same time, when the spring 11 contracts, it drives the trapezoidal column 12 at one end to slide on the inner wall of the hollow column 9. Next, when the trapezoidal column 12 moves, it drives the retaining ball 13 on the outer wall to contract and squeeze the retaining ball 13 to press it against the inside of the hole, thus achieving the effect of quickly installing the fan.

[0037] Subsequently, when adjusting the fan blades, the fan is first paused, and the fan blade plate 17 is directly moved. The fan blade plate 17 causes the fixed column 16 to rotate. When the fixed column 16 rotates, it causes the connecting plate 18 on the outer wall to rotate. When the connecting plate 18 rotates, it causes the connecting rod 19 on the side wall to rotate. Then, when the fixed column 16 rotates, it causes the connecting column 15 at one end to rotate. The connecting column 15 rotates on the outer wall of the connecting plate 7 to limit its position, thus achieving the effect of adjusting the angle of the fan blade plate 17.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fan with adjustable blade angle, comprising a housing (1), characterized in that: The inner wall of the outer shell (1) is fixedly connected to a first support plate (5), the side wall of the first support plate (5) is fixedly connected to a motor (6), the output end of the motor (6) is fixedly connected to a connecting frame (14), the side wall of the connecting frame (14) is fixedly connected to a rotating column (4), the inner wall of the connecting frame (14) is provided with a connecting plate (7), and the side wall of the connecting frame (14) is provided with an adjustment component. The adjustment assembly includes a connecting column (15), one end of which is rotatably connected to the inside of the connecting plate (7), and a fixing column (16) is fixedly connected to one end of the connecting column (15). A connecting plate (18) is fixedly connected to the outer wall of the fixing column (16). A connecting rod (19) is rotatably connected to the side wall of the connecting plate (18). The other end of the connecting rod (19) is rotatably connected to the side wall of another connecting plate (18). A fan blade plate (17) is fixedly connected to the outer wall of the fixing column (16). The side wall of the fan blade plate (17) is rotatably connected to the inner wall of the outer shell (1). A support assembly is provided on the inner wall of the connecting frame (14).

2. The adjustable blade angle axial fan according to claim 1, characterized in that: The support assembly includes a support plate (20), the side wall of which is fixedly connected to the inner wall of the connecting frame (14), and the side wall of the connecting frame (14) is disposed on the side wall of the connecting column (15).

3. The variable-angled axial fan of claim 2, wherein: The outer wall of the outer shell (1) is fixedly connected to the base (2), and the side wall of the base (2) is fixedly connected to the connecting block (3).

4. The variable-angled axial fan of claim 3, wherein: The inner wall of the connecting block (3) is slidably connected to a hollow column (9), and the inner wall of the hollow column (9) is threadedly connected to a threaded column (10).

5. The variable-angled axial fan of claim 4, wherein: One end of the threaded post (10) is fixedly connected to a turntable (8), and one end of the threaded post (10) is provided with a spring (11).

6. The variable-angled axial fan of claim 5, wherein: One end of the spring (11) is fixedly connected to one end of the threaded column (10), and the other end of the spring (11) is fixedly connected to a trapezoidal column (12).

7. The variable-angled axial fan of claim 6, wherein: The trapezoidal column (12) has a ball (13) on its outer wall, and the outer wall of the ball (13) is slidably connected to the inside of the hollow column (9).

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