Axial flow fan capable of adjusting gravity center of impeller

Abstract

The utility model belongs to the field of axial flow fans, and particularly relates to an axial flow fan capable of adjusting the gravity center of an impeller. Comprising a shell, a supporting rod is fixedly connected to an inner cavity of the shell, a motor is fixedly connected to the top of the supporting rod, and an axial flow impeller is fixedly connected to the surface of an output shaft of the motor; the threaded rod is rotated to drive the first balancing weight to move, the first balancing weight can drive the sliding block to slide on the surface of the limiting rod, when the first balancing weight moves, the gravity center of the axial flow impeller can be adjusted, meanwhile, the worm can be rotated to drive the worm gear to rotate, and the worm gear can drive the first balancing weight to rotate together through the connecting block. And by matching with the movement of the first balancing weight, the first balancing weight can move to most positions on one side of the axial flow impeller, so that the effect of adjusting the gravity center is improved, the phenomenon of centrifugal unbalance does not occur easily when the axial flow impeller rotates, vibration and noise cannot be caused, and the possibility of faults is reduced.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fans, specifically an axial flow fan with an adjustable impeller center of gravity. Background Technology

[0002] Axial flow fans are widely used; they are a type of fan where the airflow direction is the same as the fan blade axis, such as electric fans and air conditioner outdoor unit fans. They are called "axial flow" because the gas flows parallel to the fan axis. Axial flow fans are typically used in applications requiring high flow rates but low pressure. An axial flow fan is fixed in position and moves air.

[0003] In existing technology, axial flow fans mainly rely on the blades on the impeller to draw air in from the air inlet, and under the push of the blades, the air is discharged along the axial direction. However, during the manufacturing process of axial flow fans, the impeller is prone to uneven centrifugal force and deviation of the center of gravity due to tolerance or uneven blade quality, which can lead to vibration and noise, and eventually cause failure. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, the impellers of axial flow fans are prone to imbalance of centrifugal force and deviation of center of gravity during rotation due to tolerances or uneven blade quality during manufacturing, which can lead to vibration and noise and eventually malfunctions. This invention proposes an axial flow fan with an adjustable impeller center of gravity.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an axial flow fan with adjustable impeller center of gravity, including a housing, a support rod fixedly connected to the inner cavity of the housing, a motor fixedly connected to the top of the support rod, an axial flow impeller fixedly connected to the surface of the output shaft of the motor, and an adjustment mechanism provided on one side of the axial flow impeller;

[0006] The adjusting mechanism includes a first hollow block, the bottom of which is fixedly connected to the surface of an axial flow impeller. A worm gear is rotatably connected to the inner cavity of the first hollow block. A worm wheel is rotatably connected to one side of the axial flow impeller. The teeth of the worm wheel mesh with the teeth of the worm gear. A connecting block is fixedly connected to the inner cavity of the worm wheel. A threaded rod is rotatably connected to the top of the connecting block. A first counterweight is threadedly connected to the surface of the threaded rod. A limit rod is fixedly connected to the inner cavity of the worm wheel. A slider is fixedly connected to one side of the first counterweight. The inner cavity of the slider is slidably connected to the surface of the limit rod.

[0007] Preferably, a second counterweight is provided on one side of the first counterweight, a second hollow block is fixedly connected to one side of the first counterweight, a third hollow block is fixedly connected to one side of the second counterweight, and bolts are threadedly connected to the inner cavities of the second and third hollow blocks.

[0008] Preferably, the inner cavity of the first hollow block is provided with a limiting groove, the inner cavity of the limiting groove is rotatably connected to a limiting ring block, and the inner cavity of the limiting ring block is fixedly connected to the surface of the worm.

[0009] Preferably, a damping bearing is fixedly connected to one side of the first hollow block, and the inner cavity of the damping bearing is fixedly connected to the surface of the worm gear.

[0010] Preferably, the surface of the axial flow impeller is provided with a hollow groove, and a T-shaped rotating block is rotatably connected to the inner cavity of the hollow groove. One side of the T-shaped rotating block is fixedly connected to one side of the worm gear.

[0011] Preferably, a fixing block is fixedly connected to the outer side of the threaded rod near the connecting block, and the surface of the fixing block is provided with anti-slip grooves.

[0012] Preferably, a stop block is fixedly connected to the top of the threaded rod, and the diameter of the stop block is larger than the diameter of the threaded rod.

[0013] The advantages of this utility model are:

[0014] This invention uses a rotating threaded rod to move a first counterweight. The first counterweight causes a slider to slide on the surface of a limiting rod. When the first counterweight moves, the center of gravity of the axial impeller can be adjusted. Simultaneously, the worm gear can be rotated to drive the worm wheel to rotate. The worm wheel, through a connecting block, drives the first counterweight to rotate as well. Combined with the movement of the first counterweight, it can be moved to most of one side of the axial impeller, thereby improving the effect of adjusting the center of gravity. This makes the axial impeller less prone to centrifugal imbalance during rotation, thus preventing vibration and noise, reducing the possibility of failure. It solves the problem that during the manufacturing process of axial impellers, uneven tolerances or blade quality can easily lead to unbalanced centrifugal force and deviations in the center of gravity, resulting in vibration, noise, and eventual failure over time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall equipment of this utility model;

[0017] Figure 2 This is a cross-sectional view of the motor of this utility model;

[0018] Figure 3 This is a cross-sectional schematic diagram of the T-shaped rotating block of this utility model;

[0019] Figure 4 This is a schematic diagram of the adjustment structure of this utility model;

[0020] Figure 5 This is a three-dimensional schematic diagram of the second counterweight of this utility model;

[0021] Figure 6 This is a cross-sectional schematic diagram of the worm gear of this utility model;

[0022] Figure 7 This is a cross-sectional schematic diagram of the limiting ring block of this utility model.

[0023] In the diagram: 1. Housing; 2. Support rod; 3. Motor; 4. Axial flow impeller; 5. Adjustment mechanism; 501. First hollow block; 502. Worm gear; 503. Worm wheel; 504. Connecting block; 505. Threaded rod; 506. First counterweight; 507. Limiting rod; 508. Sliding block; 6. Second counterweight; 7. Second hollow block; 8. Third hollow block; 9. Bolt; 10. Limiting groove; 11. Limiting ring block; 12. Damping bearing; 13. Hollow groove; 14. T-shaped rotating block; 15. Fixing block; 16. Anti-slip groove; 17. Stop block. Detailed Implementation

[0024] 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 scope of protection of the present utility model.

[0025] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0026] This application discloses an axial flow fan with an adjustable impeller center of gravity. (Refer to...) Figure 1-4An axial flow fan with an adjustable impeller center of gravity includes a housing 1. A support rod 2 is fixedly connected to the inner cavity of the housing 1. A motor 3 is fixedly connected to the top of the support rod 2. An axial flow impeller 4 is fixedly connected to the output shaft surface of the motor 3. An adjustment mechanism 5 is provided on one side of the axial flow impeller 4. The motor 3 can be connected to the inside of the housing 1 through the support rod 2, so that the motor 3 can be stably positioned on one side of the axial flow impeller 4. The motor 3 can drive the axial flow impeller 4 to rotate, thereby realizing axial exhaust.

[0027] The adjusting mechanism 5 includes a first hollow block 501. The bottom of the first hollow block 501 is fixedly connected to the surface of the axial flow impeller 4. A worm gear 502 is rotatably connected to the inner cavity of the first hollow block 501. A worm wheel 503 is rotatably connected to one side of the axial flow impeller 4. The teeth of the worm wheel 503 mesh with the teeth of the worm gear 502. A connecting block 504 is fixedly connected to the inner cavity of the worm wheel 503. A threaded rod 505 is rotatably connected to the top of the connecting block 504. A first counterweight 506 is threadedly connected to the surface of the threaded rod 505. A limit rod 507 is fixedly connected to the inner cavity of the worm wheel 503. A slider 508 is fixedly connected to one side of the first counterweight 506. The inner cavity of the slider 508 is slidably connected to the surface of the limit rod 507.

[0028] The worm gear 503 is hollow and can be connected to the threaded rod 505 via the connecting block 504, allowing the threaded rod 505 to rotate on one side of the axial impeller 4. When the threaded rod 505 rotates, it drives the first counterweight 506 to move. The first counterweight 506 is located on one side of the axial impeller 4, and its movement can adjust the center of gravity of the axial impeller 4, preventing centrifugal imbalance during rotation and thus avoiding vibration and noise, reducing the possibility of malfunction. The limiting rod 507 can limit the first counterweight 506 via the slider 508, ensuring smooth movement of the first counterweight 506 when the threaded rod 505 rotates, preventing it from rotating on its own. The first hollow block 501 can be connected to the worm gear 502, allowing the worm gear 502 to mesh with the worm wheel 503 on one side of the axial flow impeller 4. This allows the worm gear 502 to rotate, driving the worm wheel 503 and the first counterweight 506 to rotate on one side of the axial flow impeller 4. Combined with the movement of the first counterweight 506, the first counterweight 506 can be moved to most of the position on one side of the axial flow impeller 4, thereby improving the effect of adjusting the center of gravity. At the same time, the weight of the worm gear 502 itself can also achieve a certain effect of adjusting the center of gravity. In addition, the meshing between the worm gear 502 and the worm wheel 503 has a certain degree of self-locking, making it less likely for the worm wheel 503 and the first counterweight 506 to rotate after rotation, resulting in better stability.

[0029] Reference Figure 5A second counterweight 6 is provided on one side of the first counterweight 506. A second hollow block 7 is fixedly connected to one side of the first counterweight 506. A third hollow block 8 is fixedly connected to one side of the second counterweight 6. Bolts 9 are threadedly connected to the inner cavities of the second hollow block 7 and the third hollow block 8. The second hollow block 7 and the third hollow block 8 are respectively connected to one side of the first counterweight 506 and the second counterweight 6. Their interiors can be connected together by bolts 9, thereby achieving the function of fixing the first counterweight 506 and the second counterweight 6. The second counterweight 6 can further increase the weight of the first counterweight 506, thereby better adjusting the center of gravity. At the same time, the bolts 9 can be rotated to disengage the second hollow block 7 and the third hollow block 8, so as to facilitate the disassembly of the second counterweight 6.

[0030] Reference Figure 7 The inner cavity of the first hollow block 501 has a limiting groove 10. The inner cavity of the limiting groove 10 is rotatably connected to a limiting ring block 11. The inner cavity of the limiting ring block 11 is fixedly connected to the surface of the worm 502. The inside of the limiting groove 10 can be used to place the limiting ring block 11, and the limiting ring block 11 is used to limit the worm 502, so that the worm 502 is not easy to move inside the first hollow block 501, thereby improving the stability of the worm wheel 503 and the first counterweight 506.

[0031] Reference Figure 7 A damping bearing 12 is fixedly connected to one side of the first hollow block 501. The inner cavity of the damping bearing 12 is fixedly connected to the surface of the worm 502. The damping bearing 12 has a certain damping property, so that when the axial flow impeller 4 drives the worm 502 to rotate, the worm 502 itself is not easy to rotate. The surface of the threaded rod 505 is also provided with a damping bearing 12. The outer ring of the damping bearing 12 on the surface of the threaded rod 505 is connected to the connecting block 504, and the inner cavity is connected to the threaded rod 505, so that the threaded rod 505 is also not easy to rotate.

[0032] Reference Figure 3 A hollow groove 13 is provided on the surface of the axial impeller 4. A T-shaped rotating block 14 is rotatably connected to the inner cavity of the hollow groove 13. One side of the T-shaped rotating block 14 is fixedly connected to one side of the worm wheel 503. The hollow groove 13 can reinforce the worm wheel 503 through the T-shaped rotating block 14, so that the worm wheel 503 is not easy to detach from the axial impeller 4 when it rotates on one side of the axial impeller 4.

[0033] Reference Figure 5 A fixing block 15 is fixedly connected to the outer side of the threaded rod 505 near the connecting block 504. The surface of the fixing block 15 is provided with an anti-slip groove 16. The fixing block 15 can prevent people from being accidentally injured by the threads on the surface of the threaded rod 505 when rotating the threaded rod 505, while the anti-slip groove 16 can prevent slipping, making it less likely for the hand to slip when rotating the fixing block 15.

[0034] Reference Figure 5 A stop 17 is fixedly connected to the top of the threaded rod 505. The diameter of the stop 17 is larger than the diameter of the threaded rod 505. The stop 17 can limit the first counterweight 506, so that when the threaded rod 505 moves the first counterweight 506, the first counterweight 506 is less likely to detach from the threaded rod 505, making it more stable.

[0035] Working Principle: When using this device, the motor 3 is first started to drive the axial flow impeller 4 to rotate, thereby achieving axial exhaust. When the axial flow impeller 4 becomes unstable, the threaded rod 505 is rotated to move the first counterweight 506. The first counterweight 506 will drive the slider 508 to slide on the surface of the limit rod 507. When the first counterweight 506 moves, the center of gravity of the axial flow impeller 4 can be adjusted. At the same time, the worm gear 502 can be rotated by turning the handle, which will drive the worm wheel 503 to rotate. The worm wheel 503 will drive the first counterweight 506 to rotate together through the connecting block 504. Combined with the movement of the first counterweight 506, the first counterweight 506 can be adjusted. The impeller can be moved to most of one side of the axial impeller 4, thereby improving the effect of adjusting the center of gravity. This makes it less likely for the axial impeller 4 to experience centrifugal imbalance during rotation, thus preventing vibration and noise and reducing the possibility of failure. At the same time, the meshing of the worm 502 and the worm wheel 503 has a certain degree of self-locking, making it less likely for the worm wheel 503 and the first counterweight 506 to rotate after rotation, resulting in better stability. This solves the problem that during the manufacturing process of the axial impeller 4 of the axial fan, uneven tolerances or blade quality can easily lead to unbalanced centrifugal force during rotation and deviation of the center of gravity, which in turn causes vibration and noise and is prone to failure in the long run.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An axial flow fan with an adjustable impeller center of gravity, characterized in that: Includes a housing (1), a support rod (2) is fixedly connected to the inner cavity of the housing (1), a motor (3) is fixedly connected to the top of the support rod (2), an axial flow impeller (4) is fixedly connected to the output shaft surface of the motor (3), and an adjustment mechanism (5) is provided on one side of the axial flow impeller (4); The adjusting mechanism (5) includes a first hollow block (501), the bottom of which is fixedly connected to the surface of the axial flow impeller (4). A worm (502) is rotatably connected to the inner cavity of the first hollow block (501). A worm wheel (503) is rotatably connected to one side of the axial flow impeller (4). The teeth of the worm wheel (503) mesh with the teeth of the worm (502). A connecting block (504) is fixedly connected to the inner cavity of the worm wheel (503). A threaded rod (505) is rotatably connected to the top of the connecting block (504). A first counterweight (506) is threadedly connected to the surface of the threaded rod (505). A limit rod (507) is fixedly connected to the inner cavity of the worm wheel (503). A slider (508) is fixedly connected to one side of the first counterweight (506). The inner cavity of the slider (508) is slidably connected to the surface of the limit rod (507).

2. An axial flow fan with an adjustable impeller center of gravity according to claim 1, characterized in that: A second counterweight (6) is provided on one side of the first counterweight (506), a second hollow block (7) is fixedly connected to one side of the first counterweight (506), a third hollow block (8) is fixedly connected to one side of the second counterweight (6), and bolts (9) are threadedly connected to the inner cavities of the second hollow block (7) and the third hollow block (8).

3. An axial flow fan with an adjustable impeller center of gravity according to claim 2, characterized in that: The inner cavity of the first hollow block (501) has a limiting groove (10), and the inner cavity of the limiting groove (10) is rotatably connected to a limiting ring block (11), and the inner cavity of the limiting ring block (11) is fixedly connected to the surface of the worm (502).

4. An axial flow fan with an adjustable impeller center of gravity according to claim 3, characterized in that: A damping bearing (12) is fixedly connected to one side of the first hollow block (501), and the inner cavity of the damping bearing (12) is fixedly connected to the surface of the worm (502).

5. An axial flow fan with an adjustable impeller center of gravity according to claim 4, characterized in that: The surface of the axial flow impeller (4) is provided with a hollow groove (13), and a T-shaped rotating block (14) is rotatably connected to the inner cavity of the hollow groove (13). One side of the T-shaped rotating block (14) is fixedly connected to one side of the worm gear (503).

6. An axial flow fan with an adjustable impeller center of gravity according to claim 5, characterized in that: The threaded rod (505) is fixedly connected to a fixing block (15) near the outer side of the connecting block (504), and the surface of the fixing block (15) is provided with an anti-slip groove (16).

7. An axial flow fan with an adjustable impeller center of gravity according to claim 6, characterized in that: A stop (17) is fixedly connected to the top of the threaded rod (505), and the diameter of the stop (17) is larger than the diameter of the threaded rod (505).

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