An adjustable axial flow fan

Abstract

The utility model discloses an adjustable axial flow fan, including axial flow fan body, cover and power component, the shell inside of axial flow fan body is equipped with motor and impeller mechanism, the both ends of cover all appear open setting, one end of cover is connected with the shell of axial flow fan body, and the other end fixed connection of cover has the air outlet frame, and the inner wall of air outlet frame is rotatably installed with several groups of air deflector, power component sets up in the inside of cover for adjusting the pitch angle of several groups of air deflector, in the utility model, through the rotatable installation of several groups of air deflector in the air outlet frame of cover connection and the power component for adjusting the pitch angle of air deflector in the inside of cover, can realize the regulation and control of outlet air flow direction, has solved the problem that the existing axial flow fan outlet air direction is fixed, is difficult to adapt complex air flow distribution demand, can be targeted with air delivery to target area, improves ventilation effect and environmental comfort degree.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fan technology, and more specifically, to an adjustable axial flow fan. Background Technology

[0002] Adjustable blade angle axial flow fans, by setting rotatable blades on the impeller and equipping them with an adjustment system consisting of a servo motor, gear transmission mechanism or hydraulic device, can precisely change the installation angle of the blades according to actual ventilation needs. When the demand for air volume increases, the blade angle is increased to improve the airflow capture and pushing force; when the demand for air volume decreases, the blade angle is decreased to reduce the motor load. This adjustment method avoids the energy loss caused by traditional control methods such as damper throttling and significantly improves the operating energy efficiency of the fan under varying operating conditions.

[0003] Current technical solutions focus only on adjusting the blade angle to control air volume and pressure, but neglect the control of airflow direction at the outlet. Existing axial flow fans typically have fixed straight-cylinder or simple diffuser structures at the outlet, lacking a dedicated airflow direction adjustment mechanism. This makes it difficult to adapt to complex airflow distribution needs. For example, in large industrial plants, different areas have different heat dissipation or ventilation requirements. Airflow with a fixed direction cannot be delivered to the target area, which may cause insufficient local ventilation or airflow redundancy, affecting the comfort of the production environment and the stability of equipment operation.

[0004] Therefore, a new solution is needed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an adjustable axial flow fan.

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

[0007] An adjustable axial flow fan includes an axial flow fan body, a casing, and a power assembly. The axial flow fan body has a motor and an impeller mechanism inside its casing, with an actuator built into the impeller mechanism for adjusting the blade angle. The casing has openings at both ends; one end of the casing is connected to the casing of the axial flow fan body, and the other end is fixedly connected to an air outlet frame. Several sets of air guide plates are rotatably mounted on the inner wall of the air outlet frame. The power assembly is located inside the casing and is used to adjust the pitch angle of the air guide plates.

[0008] Furthermore, the power assembly includes a linkage part and a power part. The power part includes a first hinge seat, which is fixedly connected to the inner top of the cover. An electric push rod is hinged to the bottom of the first hinge seat. A second hinge seat is hinged to the bottom of the telescopic end of the electric push rod. The second hinge seat is connected to the linkage part.

[0009] Furthermore, the linkage includes several sets of third hinge seats, which are respectively fixedly connected to the side wall of one side of several sets of air guide plates, and a connecting rod is hinged to the several sets of third hinge seats. The second hinge seat is fixedly connected to the side wall of one side of the connecting rod.

[0010] Furthermore, each of the several sets of air guide plates has a rotating shaft fixedly connected to both ends, and the rotating shaft is rotatably connected to the inner wall of the air outlet frame.

[0011] Furthermore, the side of the cover away from the air outlet frame is detachably connected to the air outlet end of the axial flow fan body via a flange.

[0012] Furthermore, a sealing element is provided at the flange connection position between the cover and the axial flow fan body. The sealing element includes an annular groove embedded in the flange end face of the cover and a rubber sealing ring adapted to snap into the annular groove. The thickness of the rubber sealing ring is greater than the depth of the annular groove, and the outer circumferential surface of the rubber sealing ring is tightly fitted to the flange end face of the axial flow fan body.

[0013] Furthermore, it also includes a mounting bracket for fixing the axial flow fan body to the pre-installation position, the mounting bracket being fixedly connected to the bottom of the axial flow fan body.

[0014] The beneficial effects of this utility model are:

[0015] In this invention, several sets of air guide plates rotatably mounted inside the air outlet frame connected to the cover, and a power component inside the cover for adjusting the pitch angle of the air guide plates, enable the control of the airflow direction at the air outlet. This solves the problem of existing axial flow fans having a fixed air outlet direction and being unable to adapt to complex airflow distribution requirements. It can specifically deliver airflow to the target area, improving ventilation effect and environmental comfort. In the overall structure, the coordinated design of the axial flow fan body, cover, air outlet frame, and power component takes into account both air volume adjustment and airflow direction control functions. The connection method between the cover and the axial flow fan body and the overall modular structure make the installation, disassembly, and maintenance of each component more convenient, improving the ease of use and maintenance efficiency of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one structure of the adjustable axial flow fan in this embodiment;

[0017] Figure 2 This is a split schematic diagram of the adjustable axial flow fan in this embodiment;

[0018] Figure 3 This is a schematic diagram of one structure of the power component in this embodiment.

[0019] Reference numerals in the attached drawings: 1. Axial flow fan body; 11. Motor; 12. Impeller mechanism; 2. Cover; 3. Air outlet frame; 4. Air guide plate; 51. Linkage part; 511. Third hinge seat; 512. Connecting rod; 52. Power part; 521. First hinge seat; 522. Electric push rod; 523. Second hinge seat; 6. Rotating shaft; 7. Fixing frame. Detailed Implementation

[0020] 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.

[0021] Example: An adjustable axial flow fan, such as Figures 1-3 As shown, the fan includes an axial flow fan body 1, inside which a motor 11 and an impeller mechanism 12 are housed. The impeller mechanism 12 has a built-in actuator for adjusting the blade angle. By incorporating the built-in actuator, the blade angle adjustment can be performed directly within the impeller mechanism 12, eliminating the need for a complex adjustment structure on the outside of the casing. This simplifies the overall fan structure and reduces external space occupation. Furthermore, the built-in design prevents the actuator from directly contacting the external airflow, reducing the impact of airflow disturbances on adjustment accuracy and ensuring the stability of blade angle adjustment.

[0022] The cover 2 has openings at both ends. One end of the cover 2 is connected to the outer shell of the axial flow fan body 1, and the other end is fixedly connected to the air outlet frame 3. Several sets of air guide plates 4 are rotatably installed on the inner wall of the air outlet frame 3. By connecting the axial flow fan body 1 and the air outlet frame 3 with the cover 2, which has openings at both ends, and rotatably installing the air guide plates 4 inside the air outlet frame 3, a complete airflow channel from the fan outlet to the airflow direction adjustment is formed. This achieves the effect of guiding the airflow direction and providing an installation foundation for airflow direction adjustment. In addition, the cylindrical structure of the cover 2 can play a certain role in rectifying the airflow, reducing the turbulence of the airflow during transmission, and improving the accuracy of airflow direction adjustment.

[0023] The power unit is housed inside the enclosure 2 and is used to adjust the pitch angle of several sets of air guide vanes 4. By placing the power unit inside the enclosure 2, it is prevented from being exposed to the external environment and corroded by dust, moisture, etc. It also makes the overall appearance of the fan simpler, achieving the effects of protecting the power unit, improving the fan's aesthetics and service life. In addition, the enclosure 2 can also provide a stable installation support environment for the power unit, reducing the interference of fan vibration on the transmission accuracy of the power unit.

[0024] Furthermore, such as Figure 3As shown, the power assembly includes a linkage part 51 and a power part 52. The power part 52 includes a first hinge seat 521, which is fixedly connected to the inner top of the cover 2. A miniature electric push rod 522 is hinged to the bottom of the first hinge seat 521. A second hinge seat 523 is hinged to the bottom of the telescopic end of the electric push rod 522. The second hinge seat 523 is connected to the linkage part 51. By setting the first hinge seat 521, the electric push rod 522 is fixed and rotated. The electric push rod 522 provides a stable linear driving force, and the power is transmitted to the linkage part 51 through the second hinge seat 523. This achieves the effect of smooth power transmission and strong controllability of driving force. The electric push rod 522 also has the characteristics of controllable stroke and fast response speed, which can realize the fine adjustment of the pitch angle of the air guide plate 4.

[0025] The linkage unit 51 includes several sets of third hinge seats 511, which are respectively fixedly connected to the side wall of one side of several sets of air guide plates 4. A connecting rod 512 is hinged to all sets of third hinge seats 511. A second hinge seat 523 is fixedly connected to the side wall of one side of the connecting rod 512. By setting a third hinge seat 511 on each set of air guide plates 4 and connecting all the third hinge seats 511 into a whole using the connecting rod 512, the driving force of the power unit 52 can be synchronously transmitted to each set of air guide plates 4. This achieves the effect of synchronous adjustment of multiple sets of air guide plates 4 and ensures consistent airflow direction adjustment. The connecting rod 512 is made of high-strength alloy material, which can effectively withstand the tensile and thrust forces during power transmission, avoiding deformation that could affect the adjustment effect.

[0026] Several sets of air guide plates 4 are fixedly connected to two ends of rotating shafts 6, which are rotatably connected to the inner wall of the air outlet frame 3. By setting rotating shafts 6 at both ends of the air guide plates 4 and rotatably engaging with the inner wall of the air outlet frame 3, the rotation support points of the air guide plates 4 are set at both ends, reducing the shaking of the air guide plates 4 during rotation, thereby improving the rotational stability of the air guide plates 4 and ensuring the accuracy of air direction adjustment. Wear-resistant bushings are also provided at the mating points of the rotating shafts 6 and the air outlet frame 3 to reduce frictional loss during rotation and extend the service life of the rotating shafts 6 and the air outlet frame 3.

[0027] Furthermore, the side of the enclosure 2 furthest from the outlet frame 3 is detachably connected to the outlet end of the axial flow fan body 1 via a flange. This flange connection facilitates disassembly, repair, or replacement in case of malfunctions in the enclosure 2 or its internal power components, improving equipment maintenance convenience and reducing maintenance costs. Additionally, the flange connection offers advantages such as high connection strength and good sealing, ensuring structural stability after the enclosure 2 and axial flow fan body 1 are connected.

[0028] A sealing element is provided at the flange connection position between the cover 2 and the axial flow fan body 1. The sealing element includes an annular groove embedded in the flange end face of the cover 2, and a rubber sealing ring adapted to snap into the annular groove. The thickness of the rubber sealing ring is greater than the depth of the annular groove, and the outer circumference of the rubber sealing ring is tightly fitted to the flange end face of the axial flow fan body 1. By setting a sealing structure in which the annular groove and the rubber sealing ring cooperate, the elastic deformation of the rubber sealing ring is used to fill the flange connection gap, and the thickness is greater than the groove depth to ensure tight fit. This achieves the effect of preventing airflow leakage from the connection gap when the fan is venting, and improving the fan's air delivery efficiency. The rubber sealing ring is made of nitrile rubber that is resistant to aging and high and low temperatures, which can adapt to different operating environments and ensure long-term sealing performance.

[0029] like Figure 1 and Figure 2 As shown, the aforementioned adjustable axial flow fan also includes a mounting bracket 7 for fixing the axial flow fan body 1 to a pre-installation position. The mounting bracket 7 is fixedly connected to the bottom of the axial flow fan body 1. By setting the mounting bracket 7 at the bottom of the axial flow fan body 1, the fan can be stably installed in a pre-installation position such as a wall or bracket, avoiding positional displacement caused by vibration during fan operation. This achieves the effect of improving the installation stability of the fan and reducing the impact of operating vibration on the equipment and the surrounding environment. The bottom of the mounting bracket 7 is also equipped with a buffer pad, which can further absorb the vibration generated by the fan operation and reduce noise pollution.

[0030] In use, the axial flow fan body 1 is first securely installed in the preset ventilation position using the fixing frame 7. The buffer pad at the bottom of the fixing frame 7 can initially reduce the vibration during the operation of the fan. After the fan is started, the motor 11 is powered on and drives the blades in the impeller mechanism 12 to rotate at high speed. During the rotation of the blades, air is drawn in from the air inlet end of the axial flow fan body 1, forming a stable airflow.

[0031] When the air volume and pressure need to be adjusted according to actual ventilation requirements, the actuator built into the impeller mechanism 12 is activated. The actuator drives the blades to rotate around the hinge point between the blades and the hub through gear transmission or linkage drive, changing the blade installation angle: if the air volume needs to be increased, the actuator controls the blades to increase the installation angle, thereby increasing the blades' capture area and pushing force on the airflow, thus increasing the output air volume; if the air volume needs to be reduced, the actuator drives the blades to decrease the installation angle, reducing the load on the motor 11 and achieving energy-saving operation.

[0032] When the pitch angle of the air outlet direction needs to be adjusted, the power unit starts working, and the electric push rod 522 in the power unit 52 extends and retracts. Since the top of the electric push rod 522 is hinged to the top of the inner part of the cover 2 through the first hinge seat 521, and the bottom end is connected to the connecting rod 512 of the linkage part 51 through the second hinge seat 523, its extension and retraction movement can drive the connecting rod 512 to move up and down. When the connecting rod 512 moves, it pulls or pushes the corresponding air guide plate 4 synchronously through each set of third hinge seats 511. The air guide plate 4 rotates within the air outlet frame 3 with the rotating shafts 6 at both ends as the rotation center, thereby changing the pitch angle of the air guide plate 4 and realizing the control of the pitch direction of the air outlet. Through the coordinated cooperation of blade angle adjustment and air guide plate 4 pitch angle adjustment, the fan can flexibly adapt to the ventilation needs of different scenarios, taking into account both energy saving and practicality.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An adjustable axial flow fan, comprising an axial flow fan body (1), a casing (2), and a power assembly, characterized in that, The axial flow fan body (1) has a motor (11) and an impeller mechanism (12) inside its outer shell. The impeller mechanism (12) has an internal actuator for adjusting the blade angle. The cover (2) has openings at both ends. One end of the cover (2) is connected to the outer shell of the axial flow fan body (1), and the other end of the cover (2) is fixedly connected to an air outlet frame (3). Several sets of air guide plates (4) are rotatably installed on the inner wall of the air outlet frame (3). The power assembly is located inside the cover (2) and is used to adjust the pitch angle of the several sets of air guide plates (4).

2. An adjustable axial flow fan according to claim 1, characterized in that, The power assembly includes a linkage part (51) and a power part (52). The power part (52) includes a first hinge seat (521), which is fixedly connected to the inner top of the cover (2). An electric push rod (522) is hinged to the bottom of the first hinge seat (521). A second hinge seat (523) is hinged to the bottom of the telescopic end of the electric push rod (522). The second hinge seat (523) is connected to the linkage part (51).

3. An adjustable axial flow fan according to claim 2, characterized in that, The linkage part (51) includes several sets of third hinge seats (511), which are fixedly connected to the side wall of one side of several sets of air guide plates (4), and a connecting rod (512) is hinged on the several sets of third hinge seats (511). The second hinge seat (523) is fixedly connected to the side wall of one side of the connecting rod (512).

4. An adjustable axial flow fan according to claim 1, characterized in that, Several sets of air guide plates (4) are fixedly connected to two ends of rotating shafts (6), and the rotating shafts (6) are rotatably connected to the inner wall of the air outlet frame (3).

5. An adjustable axial flow fan according to claim 1, characterized in that, The side of the cover (2) away from the air outlet frame (3) is detachably connected to the air outlet end of the axial flow fan body (1) via a flange.

6. An adjustable axial flow fan according to claim 5, characterized in that, The flange connection between the cover (2) and the axial fan body (1) is provided with a sealing element. The sealing element includes an annular groove embedded in the flange end face of the cover (2) and a rubber sealing ring adapted to be snapped into the annular groove. The thickness of the rubber sealing ring is greater than the depth of the annular groove, and the outer circumferential surface of the rubber sealing ring is tightly fitted to the flange end face of the axial fan body (1).

7. An adjustable axial flow fan according to claim 1, characterized in that, It also includes a mounting bracket (7) for fixing the axial fan body (1) in a pre-installation position, the mounting bracket (7) being fixedly connected to the bottom of the axial fan body (1).

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