Fan fixing structure

Abstract

The utility model provides a fixing structure of a fan, and belongs to the technical field of fans. The technical problem that an existing fan is inconvenient to install is solved. The fan fixing structure comprises an air duct shell, a driving motor and fan blades are coaxially arranged in the air duct shell, the driving motor and the fan blades are rotationally connected through an output shaft, the air duct shell comprises an upper shell and a lower shell, a first support is fixedly connected in the lower shell, the first support comprises a vertical fixing rod and a horizontal fixing rod, and the vertical fixing rod and the horizontal fixing rod are perpendicular to each other. Two symmetrical fixing plates are fixedly connected to the upper portion of the first support, the driving motor is fixedly connected between the fixing plates, the driving motor is sleeved with a drainage cover, a notch is formed in the lower end of the drainage cover, the drainage cover is fixedly clamped to the first support, second supports are fixedly connected to the two sides of the drainage cover, and the second supports are fixedly connected with a horizontal fixing rod. The end, close to the fan blades, of the drainage cover is fixedly connected with a supporting rod. The LED lamp has the advantages of being convenient to install and good in heat dissipation.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine technology, and specifically refers to a wind turbine fixing structure. Background Technology

[0002] A mixed-flow fan includes a duct housing, inside which mixed-flow fan blades are coaxially rotatably connected. A drive motor is also housed within the duct housing, with its output shaft coaxially fixed to the mixed-flow fan blades to drive their rotation. For example, in a mixed-flow fan with application number 2024106561624, a drive source, which can be a servo motor, is also fixed within the duct housing via a fixed bracket. This drive source includes an extended output shaft, which is coaxially fixed to the mixed-flow fan blades to drive their rotation. However, this fixed bracket is inconvenient to install and remove, and the drive motor, installed inside the duct housing, generates heat during operation. Prolonged high-load operation may lead to insufficient heat dissipation and motor overheating, affecting its lifespan. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a fan mounting structure. The technical problem this invention aims to solve is how to more easily install and disassemble the drive motor, and how to improve the heat dissipation of the drive motor.

[0004] The objective of this utility model can be achieved through the following technical solution: A fan fixing structure includes a fan casing, in which a drive motor and fan blades are coaxially arranged, and the drive motor and fan blades are rotatably connected via an output shaft. The fan casing includes an upper casing and a lower casing. A first bracket is fixedly connected inside the lower casing. The first bracket includes mutually perpendicular vertical fixing rods and horizontal fixing rods. Two symmetrical fixing plates are fixedly connected above the first bracket. The drive motor is fixedly connected between the fixing plates. A flow guide is fitted outside the drive motor. The lower end of the flow guide has a notch and is fixedly engaged with the first bracket. Second brackets are fixedly connected to both sides of the flow guide. The second brackets are fixedly connected to the horizontal fixing rods. A support rod is fixedly connected to the end of the flow guide near the fan blades. The first bracket is firmly fixed inside the lower casing, providing a solid rigid foundation for the entire drive system. The drive motor is clamped between the two symmetrical fixing plates and fixed to the first bracket via the fixing plates. This symmetrical clamping method greatly restricts the motor's radial and axial degrees of freedom, preventing it from swaying or rotating eccentrically during start-up, stopping, or load changes. The exhaust shroud itself is a heat dissipation component, secured to the first bracket via a notch at its lower end. It is further secured to the sides by horizontal fixing rods of the first bracket via second brackets, and further secured near the fan blade ends by support rods, adding a rigid external frame constraint to the motor body. The motor, fixing plate, first bracket, exhaust shroud, second bracket, and support rods form a highly integrated and interlocking rigid whole. This multi-point, multi-dimensional rigid fixing structure maximally suppresses vibrations generated by the drive motor itself and prevents vibrations caused by external airflow or load fluctuations from being transmitted to the motor. Vibration is a significant factor leading to motor bearing wear, coil loosening, and poor heat dissipation contact. Significantly reducing vibration means reducing internal frictional heat generation and maintaining stable contact along the heat dissipation path. The exhaust shroud, fitted over the drive motor, better directs airflow from the vents to the drive motor for heat dissipation.

[0005] Furthermore, the air intake shroud includes a flared end near the fan blades, with a smoothly connected constricted neck at the end of the flared end away from the fan blades. The support rod is located at the end of the flared end near the fan blades. Utilizing the negative pressure area generated by the fan blade rotation, airflow from behind the fan blades, i.e., the drive motor area, is guided into the air intake shroud, accelerating the drawn-in airflow and enhancing its scouring effect on the shroud wall, thereby improving the convective heat transfer coefficient. The support rod, located at the end of the flared end, may provide some guidance and support, preventing end deformation from affecting the airflow path.

[0006] Furthermore, a guide impeller is fixedly installed inside the air duct housing, and the fan blades are located between the guide impeller and the drive motor. The guide impeller includes several helical blades and a hub. The guide impeller makes the airflow entering the air duct flow more evenly and smoothly towards the fan blades. More stable and uniform air intake reduces flow separation and eddies in the fan blade and motor areas, reduces flow losses, and makes the airflow in the area between the drive motor and the guide shroud more stable.

[0007] Furthermore, an outer shell is fixedly mounted on the outside of the aforementioned duct housing via a fixed bracket, with a gap between the outer shell and the duct housing. This gap forms an insulating air layer, effectively blocking external environmental heat radiation or conduction into the internal duct housing. Several circumferentially distributed ventilation holes at both ends of the duct housing allow for a small amount of natural air convection within this gap, carrying away some of the heat conducted from the duct housing. Alternatively, sound-insulating or vibration-damping pads can be directly installed between the outer shell and the duct housing; that is, sound-insulating or vibration-damping pads are filled within the gap between the outer shell and the duct housing.

[0008] Furthermore, a fixing block is fixedly connected to the outer side of the outer casing. The fixing block and the outer casing together have a mounting groove. The vertical fixing rod passes through the mounting groove and abuts against the bottom of the groove. The fixing block and the vertical fixing rod are fixed together with fasteners. The vertical fixing rod passes through the mounting groove of the fixing block on the outer casing and abuts against the bottom of the groove, then is fixed with fasteners. This allows the drive motor and the first bracket to be directly and rigidly connected to the outermost outer casing, ensuring the stability of the entire fan system when installed on the base. Stable external installation further isolates external vibrations.

[0009] Furthermore, the outer shell is fixed by splicing together at least two arc-shaped plates.

[0010] Compared with the prior art, the technical effects of this utility model are as follows: by externally fixing the first bracket, symmetrical fixing plate, diversion shroud, second bracket, support rod and vertical rod, the drive motor and diversion shroud are significantly suppressed from the source. This stability improves heat dissipation efficiency. It ensures efficient heat conduction from the motor to the diversion shroud and maintains the carefully designed airflow channel of the diversion shroud, so that it can continuously and efficiently use the negative pressure generated by the fan blades to guide and accelerate the cooling airflow, maximizing the convective heat dissipation effect. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the present invention.

[0012] Figure 2 This is the front view of this utility model.

[0013] Figure 3 This is a perspective view of the present invention.

[0014] Figure 4 This is a half-sectional view of the present invention.

[0015] Figure 5 This is a perspective view of the drive motor fixing structure of this utility model.

[0016] Drawing number markings: 1. Duct housing; 101. Upper housing; 102. Lower housing; 2. Drive motor; 3. Fan blade; 4. Output shaft; 5. First bracket; 501. Vertical fixing rod; 502. Horizontal fixing rod; 503. Arc-shaped connecting plate; 6. Fixing plate; 7. Drainage hood; 701. Flared section; 702. Neck; 703. Notch; 8. Second bracket; 9. Support rod; 10. Guide impeller; 11. Outer housing; 12. Fixing block; 13. Mounting groove. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] according to Figures 1 to 5As shown, a fan fixing structure includes a fan housing 1. A drive motor 2 and a fan blade 3 are coaxially arranged inside the fan housing 1. The drive motor 2 and the fan blade 3 are rotatably connected via an output shaft 4. The fan housing 1 includes an upper housing 101 and a lower housing 102, which are locked and fixed by a semi-circular fastener. The gap between the upper housing 101 and the lower housing 102 is sealed. A first bracket 5 is fixedly connected inside the lower housing 102. The first bracket 5 includes mutually perpendicular vertical fixing rods 501 and horizontal fixing rods 502, which are symmetrically arranged. One horizontal fixing rod 502 corresponds to one vertical fixing rod 501. Two vertical fixing rods 501 are fixedly connected by an arc-shaped connecting plate 503. Two symmetrical fixing plates 6 are fixedly connected above the first bracket 5, and the drive motor 2 is fixedly connected between the fixing plates 6 by bolts. A cooling shroud 7 is fitted over the outside of the drive motor 2. The lower end of the cooling shroud 7 has a notch 703 and is fixedly fastened to the first bracket 5. Second brackets 8 are fixedly connected to both sides of the cooling shroud 7, and the second brackets 8 are fixedly connected to the horizontal fixing rod 502. A support rod 9 is fixedly connected to the end of the cooling shroud 7 near the fan blade 3. The first bracket 5 is firmly fixed inside the lower housing 102, providing a solid rigid foundation for the entire drive system. The drive motor 2 is clamped between two symmetrical fixing plates 6 and fixed to the first bracket 5 by the fixing plates 6. This symmetrical clamping method greatly restricts the motor's radial and axial degrees of freedom, preventing it from shaking or rotating eccentrically during start-up, stopping, or load changes. The cooling shroud 7 itself is a heat dissipation component, and it is further secured to the first bracket 5 by its lower notch 703. The two sides are fixed to the horizontal fixing rod 502 of the first bracket 5 by the second brackets 8, and the end near the fan blade 3 is also fixed by the support rod 9, adding a rigid external frame constraint to the motor body. The motor, fixing plate 6, first bracket 5, air intake shroud 7, second bracket 8, and support rod 9 form a highly integrated and interlocked rigid whole. This multi-point, multi-dimensional rigid fixing structure minimizes the vibration generated by the drive motor 2 itself and prevents vibrations caused by external airflow or load fluctuations from being transmitted to the motor. Vibration is a major factor leading to motor bearing wear, coil loosening, and poor heat dissipation contact. Significantly reducing vibration means reducing internal frictional heat generation and maintaining stable contact in the heat dissipation path. The air intake shroud 7 is fitted outside the drive motor 2, which can better guide the airflow from the vent to the drive motor 2 for heat dissipation. A guide impeller 10 is also fixedly installed inside the air duct housing 1, with the fan blades 3 located between the guide impeller 10 and the drive motor 2. The guide impeller 10 includes several spiral blades and a hub. The guide impeller 10 makes the airflow entering the air duct flow more evenly and smoothly to the fan blades 3. More stable and uniform air intake can reduce flow separation and eddies in the fan blade 3 and motor area, reduce flow losses, and make the airflow in the area between the drive motor 2 and the shroud 7 smoother.

[0020] The shroud 7 includes a flared portion 701 at one end near the fan blade 3, and a smoothly connected constricted neck 702 at the other end of the flared portion 701 away from the fan blade 3. A support rod 9 is located at the end of the flared portion 701 near the fan blade 3. Utilizing the negative pressure area generated by the rotation of the fan blade 3, airflow from behind the fan blade 3, i.e., the area of ​​the drive motor 2, is guided into the shroud 7, accelerating the drawn-in airflow and enhancing its scouring effect on the wall of the shroud 7, thereby improving the convective heat transfer coefficient. The support rod 9, located at the end of the flared portion 701, may provide some guidance and support, preventing end deformation from affecting the airflow path.

[0021] An outer shell 11 is fixedly mounted on the outside of the duct housing 1 via a fixed bracket, with a gap between the outer shell 11 and the duct housing 1. This gap forms an insulating air layer, effectively blocking external heat radiation or conduction into the duct housing 1. Several circumferentially distributed ventilation holes at both ends of the duct housing 1 allow for a small amount of natural air convection within this gap, carrying away some of the heat conducted from the duct housing 1. Alternatively, sound-insulating or vibration-damping pads can be directly installed between the outer shell 11 and the duct housing 1; that is, sound-insulating or vibration-damping pads are filled into the gap between the outer shell 11 and the duct housing 1. A fixing block 12 is fixedly connected to the outside of the outer shell 11. A mounting groove 13 is shared between the fixing block 12 and the outer shell 11. A vertical fixing rod 501 passes through the mounting groove 13 and abuts against the bottom of the groove. The fixing block 12 and the vertical fixing rod 501 are fixed together by fasteners. The vertical fixing rod 501 passes through the mounting groove 13 of the fixing block 12 of the outer casing 11 and abuts against the bottom of the groove, and is then fixed with fasteners, so that the drive motor 2 and the first bracket 5 are directly and rigidly connected to the outermost outer casing 11, ensuring the stability of the entire fan system when installed on the base. Stable external installation further isolates external vibrations. The outer casing 11 is fixed by splicing at least two arc-shaped plates.

[0022] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A fan fixing structure, comprising a fan casing (1), wherein a drive motor (2) and a fan blade (3) are coaxially arranged inside the fan casing (1), and the drive motor (2) and the fan blade (3) are rotatably connected via an output shaft (4), characterized in that: The duct housing (1) includes an upper housing (101) and a lower housing (102). A first bracket (5) is fixedly connected inside the lower housing (102). The first bracket (5) includes a vertical fixing rod (501) and a horizontal fixing rod (502) that are perpendicular to each other. Two symmetrical fixing plates (6) are fixedly connected above the first bracket (5). The drive motor (2) is fixedly connected between the fixing plates (6). A flow guide (7) is sleeved on the outside of the drive motor (2). The lower end of the flow guide (7) has a notch (703) and is fixedly clamped on the first bracket (5). A second bracket (8) is fixedly connected to both sides of the flow guide (7). The second bracket (8) is fixedly connected to the horizontal fixing rod (502). A support rod (9) is fixedly connected to the end of the flow guide (7) near the fan blade (3).

2. The fan fixing structure according to claim 1, characterized in that: The drainage hood (7) includes a flared portion (701) at one end near the fan blade (3), and a neck (702) smoothly connected to the other end of the flared portion (701) away from the fan blade (3). The support rod (9) is located at the end of the flared portion (701) near the fan blade (3).

3. A fan fixing structure according to claim 1 or 2, characterized in that: The air duct housing (1) is also fixedly provided with a guide impeller (10), and the fan blade (3) is located between the guide impeller (10) and the drive motor (2). The guide impeller (10) includes several spiral blades and a hub.

4. A fan fixing structure according to claim 1 or 2, characterized in that: An outer shell (11) is fixedly mounted on the outside of the air duct shell (1) by a fixed bracket, and there is a gap between the outer shell (11) and the air duct shell (1).

5. The fan fixing structure according to claim 4, characterized in that: A fixing block (12) is fixedly connected to the outside of the outer shell (11). The fixing block (12) and the outer shell (11) are provided with a mounting groove (13). The vertical fixing rod (501) passes through the mounting groove (13) and abuts against the bottom of the mounting groove (13). The fixing block (12) and the vertical fixing rod (501) are fixed by fasteners.

6. The fan fixing structure according to claim 5, characterized in that: The outer shell (11) is fixed by splicing at least two arc plates.

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