A fan shroud structure

Abstract

This utility model discloses a fan shroud structure for an axial flow fan, including a shroud; when the shroud covers the fan, the fan's rotation axis is the central axis of the shroud; several stationary blades are arranged inside the shroud, and the stationary blades are circumferentially distributed around the central axis; the stationary blades are movably connected to the shroud, and the stationary blades can be rotated and adjusted relative to the shroud, with the rotation axis of the stationary blades perpendicular to the central axis. The shroud has a rotating hole, and an adjusting shaft is connected to the stationary blades, with the adjusting shaft rotatably engaging with the rotating hole. The rotating hole is a through hole; one end of the adjusting shaft is an adjusting end, extending out of the rotating hole from the shroud, and the adjusting end is equipped with an adjusting knob. This utility model movably connects stationary blades to the shroud, and the angle of the stationary blades is adjustable to meet different heat dissipation requirements, thereby improving the versatility of the shroud.

Description

Technical Field

[0001] This utility model relates to the field of cooling fan technology, and in particular to a fan shroud structure for an axial fan. Background Technology

[0002] In electric motors, an external fan shroud is often used in conjunction with an external fan to facilitate heat convection exchange between the motor's cooling fins and the motor itself, removing heat. Cooling fans are divided into axial fans and centrifugal fans. For axial fans, a stator structure can be installed inside the shroud for rectification and guidance, transforming the turbulent airflow generated by the fan blades into a stable, concentrated, and uniformly oriented direct current, thereby significantly improving the overall performance and efficiency of the fan. Within the same series of motors, different specifications or operating environments will result in different cooling requirements, and consequently, the optimal stator installation angle will also differ. Currently, existing stators are generally fixed to the shroud, and their installation angle cannot be adjusted, leading to poor versatility of the shroud. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a fan shroud structure for an axial flow fan, on which stator blades are movably connected, and the angle of the stator blades is adjustable to meet different heat dissipation requirements, thereby improving the versatility of the fan shroud.

[0004] Technical solution: To achieve the above objectives, the present invention provides a fan shroud structure for an axial flow fan, comprising a fan shroud; when the fan shroud covers the fan, the fan's rotation axis is the central axis of the fan shroud; a plurality of stationary blades are provided inside the fan shroud, and the stationary blades are circumferentially distributed around the central axis; the stationary blades are movably connected to the fan shroud, and the stationary blades can be rotated and adjusted relative to the fan shroud, and the rotation axis of the stationary blades is perpendicular to the central axis.

[0005] Furthermore, the wind shroud is provided with a rotating hole, and the stationary blade is connected to an adjusting shaft, which rotates in conjunction with the rotating hole.

[0006] Furthermore, the rotating hole is a through hole; one end of the adjusting shaft is an adjusting end, which extends out of the fan cover from the rotating hole, and the adjusting end is equipped with an adjusting knob.

[0007] Furthermore, the rotating hole has an annular groove; the adjusting end of the adjusting shaft has a slit, and there are arc-shaped locking blocks on both sides of the slit, which rotate in conjunction with the annular groove; during the process of the adjusting shaft being inserted into the rotating hole, the arc-shaped locking blocks can deform to flatten the slit; the adjusting knob is separately connected to the adjusting shaft, and the bottom of the adjusting knob has a plug that engages with the slit.

[0008] Furthermore, a ring seat is provided on the outer wall of the wind cover, a rotating hole extends out from the ring seat, and an annular groove is located on the inner wall of the ring seat; the ring seat has an expansion and contraction slot, which allows the ring seat to expand and contract, and a locking nut is threaded on the outer wall of the ring seat.

[0009] Furthermore, the adjustment knob has an indicator structure, and the top of the ring seat has a scale. The angle of the stationary blade can be determined by the scale indicated by the indicator structure.

[0010] Furthermore, the wind shroud is provided with an air inlet, and the central axis of the wind shroud passes through the air inlet; a number of stationary blades form an annular stationary blade array, and a cavity for accommodating the fan blades is formed between the annular stationary blade array and the air inlet; a guide shroud is provided on the side of the annular stationary blade array away from the air inlet, and an annular airflow channel is formed between the outer wall of the guide shroud and the inner wall of the wind shroud, and the airflow channel gradually narrows in the direction away from the annular stationary blade array.

[0011] Furthermore, there are several circumferentially distributed support columns between the wind shield and the air guide shield, and the outer wall of the air guide shield is connected to the inner wall of the wind shield through the support columns.

[0012] Furthermore, the center of the air deflector has a shaft hole through which the fan shaft passes.

[0013] Furthermore, the air inlet has several ventilation holes distributed in a mesh pattern.

[0014] Beneficial effects: The axial fan shroud structure of this utility model has movably connected stator blades on the shroud. By rotating the adjustment shaft extending from the shroud on the stator blades, the installation angle of the stator blades can be changed, thereby changing the rectification effect of the annular stator blade array on the airflow to meet different heat dissipation requirements and thus improve the versatility of the shroud. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the fan cover of the present invention covering the cooling fan of the motor;

[0016] Appendix Figure 2 This is a schematic diagram of the overall structure of the windshield;

[0017] Appendix Figure 3 This is a schematic diagram of the connection structure between the adjusting shaft and the rotating hole. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] As attached Figures 1 to 3The aforementioned axial flow fan shroud structure includes a shroud 1; when the shroud 1 covers the fan, the fan's rotation axis is the central axis 2 of the shroud 1. A plurality of stationary blades 3 are disposed inside the shroud 1, arranged circumferentially around the central axis 2. The stationary blades 3 are movably connected to the shroud 1, and can rotate and adjust relative to the shroud 1, with the rotation axis of the stationary blades 3 perpendicular to the central axis 2. Specifically, a rotating hole 4 is provided on the shroud 1, and an adjusting shaft 5 is connected to the stationary blades 3. The adjusting shaft 5 rotatably engages with the rotating hole 4, and rotating the adjusting shaft 5 can change the installation angle of the stationary blades 3. Different installation angles of the stationary blades 3 can meet different heat dissipation requirements.

[0020] The rotating hole 4 is a through hole, penetrating the ventilation hood 1. The end of the adjusting shaft 5 furthest from the stationary blade 3 is the adjusting end, which extends out of the ventilation hood 1 from the rotating hole 4 and is equipped with an adjusting knob 6. The adjusting knob 6 has a slotted or cross-shaped groove, allowing it to be turned with a screwdriver. Therefore, the angle of the stationary blade 3 can be adjusted directly from outside the ventilation hood 1 without removing the hood 1 and adjusting it from inside, simplifying operation.

[0021] An annular groove 7 is located within the rotating hole 4. The adjusting end of the adjusting shaft 5 has a notch 8, and arc-shaped locking blocks 9 are located on both sides of the notch 8. The cross-sectional shape of the arc-shaped locking blocks 9 matches the cross-sectional shape of the annular groove 7, and the arc-shaped locking blocks 9 rotatably engage with the annular groove 7. During the process of the adjusting shaft 5 being inserted into the rotating hole 4, the arc-shaped locking blocks 9 on both sides can deform to flatten the notch 8. The adjusting knob 6 is separately connected to the adjusting shaft 5, and the bottom of the adjusting knob 6 has a plug 10 that engages with the notch 8. (See attached...) Figure 3 As shown, the shape of the insert 10 is consistent with the shape of the cut 8. When the insert 10 is inserted into the cut 8, the arc-shaped locking blocks 9 on both sides cannot be deformed. Therefore, the arc-shaped locking blocks 9 can maintain rotational engagement with the annular locking groove 7 to prevent the adjusting shaft 5 from disengaging from the rotating hole 4.

[0022] Furthermore, a ring seat 11 is provided on the outer wall of the wind cover 1, with a rotating hole 4 extending from the ring seat 11, and an annular groove 7 located on the inner wall of the ring seat 11. The ring seat 11 has an expansion joint, allowing it to expand and contract, and correspondingly, the annular groove 7 can also deform. The outer wall of the ring seat 11 has an external thread structure, and a locking nut 13 is threaded onto the outer wall of the ring seat 11. When the locking nut 13 is removed, the expansion joint opens, allowing the adjusting shaft 5 to rotate and adjust within the rotating hole 4, thereby adjusting the installation angle of the stator vane 3. After the locking nut 13 is installed, the expansion joint narrows, and the ring seat 11 grips the adjusting shaft 5, thus fixing the stator vane 3 at the desired angle.

[0023] The adjustment knob 6 has an indicator structure, such as a pointer or an indicator arrow. There is a scale on the top of the ring base 11. The angle of the stationary blade 3 can be determined by the scale indicated by the indicator structure, making it easy to adjust the stationary blade 3 to the required installation angle.

[0024] An air inlet 14 is provided on the fan shroud 1, and several ventilation holes are distributed in a mesh pattern at the air inlet 14. The central axis 2 of the fan shroud 1 passes through the air inlet 14, and the external airflow enters the fan shroud 1 through the air inlet 14. Several stationary blades 3 form an annular stationary blade array, and a cavity for accommodating the fan blades 12 is formed between the annular stationary blade array and the air inlet 14. Several circumferentially distributed support columns 17 are provided between the fan shroud 1 and the guide shroud 15, and the outer wall of the guide shroud 15 is connected to the inner wall of the fan shroud 1 through the support columns 17. There is a shaft hole 18 at the center of the guide shroud 15 for the fan shaft 19 to pass through. (See attached diagram) Figure 1 As shown, when the shroud 1 covers the fan, the fan blades 12 are located between the annular stator array and the air inlet 14. A guide shroud 15 is provided on the side of the annular stator array away from the air inlet 14. The guide shroud 15 is annular, and an annular airflow channel 16 is formed between the outer wall of the guide shroud 15 and the inner wall of the shroud 1. The outer diameter of the guide shroud 15 gradually increases in the direction away from the annular stator array, and correspondingly, the airflow channel 16 gradually narrows in the direction away from the annular stator array, thereby increasing the air pressure.

[0025] The wind shield 1 of this utility model is movably connected with several stationary blades 3. The installation angle of the stationary blades 3 is adjustable, thereby changing the rectification effect of the annular stationary blade array on the airflow to meet different heat dissipation requirements. (See attached diagram) Figure 3 For example, when adjusting the installation angle of the stationary blade 3, first unscrew the locking nut 13, then use a screwdriver to turn the adjusting knob 6, causing the adjusting shaft 5 to move the stationary blade 3. Observe the scale indicated by the adjusting knob to obtain the angle information of the stationary blade 3. After the adjustment is completed, put the locking nut 13 back onto the ring seat 11, so that the ring seat 11 grips the adjusting shaft 5, thereby fixing the stationary blade 3 at the required installation angle.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A fan shroud structure for an axial flow fan, characterized in that: Includes a fan cover (1); when the fan cover (1) covers the fan, the rotation axis of the fan is the central axis (2) of the fan cover (1); a number of stationary blades (3) are provided inside the fan cover (1), and the stationary blades (3) are distributed in a ring around the central axis (2); the stationary blades (3) are movably connected to the fan cover (1), and the stationary blades (3) can be rotated and adjusted relative to the fan cover (1), and the rotation axis of the stationary blades (3) is perpendicular to the central axis (2).

2. The fan shroud structure of an axial flow fan according to claim 1, characterized in that: The wind cover (1) is provided with a rotating hole (4), and the stationary blade (3) is connected to an adjusting shaft (5). The adjusting shaft (5) and the rotating hole (4) are rotatably engaged.

3. The shroud structure of an axial flow fan according to claim 2, characterized in that: The rotating hole (4) is a through hole; one end of the adjusting shaft (5) is an adjusting end, which extends out of the wind cover (1) from the rotating hole (4), and the adjusting end is equipped with an adjusting knob (6).

4. The shroud structure of an axial flow fan according to claim 3, characterized in that: The rotating hole (4) has an annular groove (7); the adjusting end of the adjusting shaft (5) has a cut (8), and there are arc-shaped blocks (9) on both sides of the cut (8). The arc-shaped blocks (9) are rotatably engaged with the annular groove (7); during the process of the adjusting shaft (5) being squeezed into the rotating hole (4), the arc-shaped blocks (9) can be deformed to flatten the cut (8); the adjusting knob (6) is separately connected to the adjusting shaft (5), and there is a plug (10) at the bottom of the adjusting knob (6) that is engaged with the cut (8).

5. The shroud structure of an axial flow fan according to claim 4, characterized in that: The outer wall of the wind cover (1) is provided with a ring seat (11), the rotating hole (4) passes through the ring seat (11), and the annular groove (7) is located on the inner wall of the ring seat (11); the ring seat (11) has an expansion and contraction slot, so that the ring seat (11) can expand and contract; the outer wall of the ring seat (11) is threaded with a locking nut (13).

6. The fan shroud structure of an axial flow fan according to claim 5, characterized in that: The adjustment knob (6) has an indicator structure, and the top of the ring seat (11) has a scale. The angle of the stationary blade (3) can be determined by the scale indicated by the indicator structure.

7. The fan shroud structure of an axial flow fan according to claim 1, characterized in that: The shroud (1) is provided with an air inlet (14), and the central axis (2) of the shroud (1) passes through the air inlet (14); a number of stationary blades (3) form an annular stationary blade array, and a cavity for accommodating the fan blades (12) is formed between the annular stationary blade array and the air inlet (14); a guide shroud (15) is provided on the side of the annular stationary blade array away from the air inlet (14), and an annular airflow channel (16) is formed between the outer wall of the guide shroud (15) and the inner wall of the shroud (1), and the airflow channel (16) gradually narrows in the direction away from the annular stationary blade array.

8. The fan shroud structure of an axial flow fan according to claim 7, characterized in that: There are several circumferentially distributed support columns (17) between the wind shield (1) and the air guide (15), and the outer wall of the air guide (15) is connected to the inner wall of the wind shield (1) through the support columns (17).

9. The fan shroud structure of an axial flow fan according to claim 7, characterized in that: The center of the shroud (15) has a shaft hole (18) through which the fan shaft (19) passes.

10. The shroud structure of an axial flow fan according to claim 7, characterized in that: The air inlet (14) has several ventilation holes distributed in a mesh pattern.

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