Coaxial counter-rotating two-stage fan mechanism

Abstract

The utility model discloses a coaxial reverse rotation two-stage fan mechanism which comprises a fan shell and a fan frame. The fan shell is used for supporting mechanism elements, and a fan blade adjusting assembly and a reverse rotation driving assembly are arranged on the fan frame. The utility model relates to the technical field of coaxial counter-rotating fans, and has the following beneficial effects that the fan blades can be simultaneously driven by adopting the double-layer fan blades and using the two-stage counter-rotating driving assembly, so that the air supply volume limitation of the fan can be improved, the air supply volume of the fan is greatly improved, and the service life of the fan is prolonged. Through the fan blade adjusting assembly, the air supply amount is precisely adjusted by adjusting the inclination angle of the fan blades, and the problem that the air supply amount is not precisely adjusted by controlling the rotating speed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly and processing, in particular to a coaxial counter-rotating two-stage fan mechanism. Background Art

[0002] During the wind tunnel experiment, a fan mechanism that simulates airflow is a necessary component of the experiment. However, traditional fans all have single-layer blades that rotate to deliver air. However, the air output of such fans is limited, and the air output is controlled by controlling the rotation speed of the blades. The method is single and not easy to control accurately. Utility Model Content

[0003] To achieve the above objectives, the utility model is implemented through the following technical solutions: a coaxial counter-rotating two-stage fan mechanism, comprising a fan housing and a fan frame; the fan housing is used to support the mechanism components, and the fan frame is provided with a fan blade adjustment component and a counter-rotating drive component;

[0004] The fan blade adjustment assembly includes: a front fan blade frame, a rear fan blade frame, an axis hole, a rotating shaft, a fan blade, an adjustment gear, a first gear pair, a connecting ring, a transmission gear, a driving gear, a motor box, a driving motor and a main shaft hole;

[0005] The shaft hole is opened around the front fan blade frame and the rear fan blade frame, the rotating shaft is installed in the shaft hole, the fan blade is connected to the rotating shaft, the adjusting gear is sleeved on the other end of the rotating shaft, the first gear pair is connected to the transmission gear through a connecting ring, the main shaft hole is opened on the rear of the fan frame and the first gear pair, the connecting ring is installed in the main shaft hole, the motor box is installed on the fan frame, the drive motor is installed in the motor box, the drive gear is sleeved on the output end of the drive motor and meshes with the transmission gear, the teeth of the first gear pair are meshed with the adjusting gear, and this component can be used to adjust the inclination angle of the fan blade.

[0006] Preferably, the anti-rotation drive assembly comprises: a rotating main shaft, a hollow shaft, a drive frame, a motor frame, a rotating motor, a main gear, a drive slot, a second gear pair and a third gear pair;

[0007] The rotating main shaft is rotatably connected between the fan casing and the inner wall of the driving groove and passes through the main shaft hole and the connecting ring. The front fan blade frame is sleeved on the rotating main shaft. The hollow shaft is installed at the rear of the fan casing and sleeved on the rotating main shaft. The rear fan blade frame is sleeved on the hollow shaft. The driving frame is installed on the outer wall of the fan casing. The motor frame is installed on the driving frame. The rotating motor is installed in the motor frame. The main gear is sleeved on the output end of the rotating motor. The second gear pair is sleeved on the hollow shaft. The third gear pair is sleeved on the rotating main shaft. The second gear pair and the third gear pair are meshed with the main gear at the same time. Through this component, double-layer fan blades can be driven simultaneously.

[0008] Preferably, the transmission gear is provided with an axial hole.

[0009] Preferably, air outlets are provided at the front and rear of the fan housing.

[0010] Preferably, the fan blades installed on the front fan blade frame and the rear fan blade frame are arranged with opposite inclination directions.

[0011] Beneficial Effects

[0012] The present invention is a coaxial counter-rotating two-stage fan mechanism, which has the following beneficial effects:

[0013] In this case, double-layer fan blades are adopted and two-stage counter-rotation drive components are used to drive the fan blades simultaneously, so that the air supply limit of the fan can be increased, and the air supply of the fan can be greatly increased. The fan blade adjustment component can be used to accurately adjust the air supply by adjusting the inclination angle of the fan blades, thereby solving the inaccuracy of adjusting the air supply by controlling the speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of a coaxial counter-rotating two-stage fan mechanism described in the utility model.

[0015] Figure 2-5 It is a schematic diagram of the internal three-dimensional structure of a coaxial counter-rotating two-stage fan mechanism described in the utility model.

[0016] Figure 6 This is a schematic diagram of the internal structure of a blade adjustment component of a coaxial counter-rotating two-stage fan mechanism described in the utility model.

[0017] Figure 7 This is a side view cross-sectional structural diagram of a coaxial counter-rotating two-stage fan mechanism according to the utility model.

[0018] Figure 8-9 It is a partially enlarged schematic diagram of a blade adjustment assembly of a coaxial counter-rotating two-stage fan mechanism described in the utility model.

[0019] Fig.10 It is a partially enlarged schematic diagram of a counter-rotating drive assembly of a coaxial counter-rotating two-stage fan mechanism described in the present invention.

[0020] In the figure: 1. fan housing; 2. fan frame; 3. front fan blade frame; 4. rear fan blade frame; 5. shaft hole; 6. rotating shaft; 7. fan blade; 8. adjusting gear; 9. first gear pair; 10. connecting ring; 11. transmission gear; 12. driving gear; 13. motor box; 14. driving motor; 15. main shaft hole; 16. rotating main shaft; 17. hollow shaft; 18. driving frame; 19. motor frame; 20. rotating motor; 21. main gear; 22. driving slot; 23. second gear pair; 24. third gear pair; DETAILED DESCRIPTION

[0021] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0022] See also Figure 1-10 , the utility model provides a technical solution.

[0023] A coaxial counter-rotating two-stage fan mechanism, comprising a fan housing 1 and a fan frame 2; the fan housing 1 is used to support the mechanism components, and the fan frame 2 is provided with a blade adjustment component and a counter-rotating drive component;

[0024] The fan blade adjustment assembly includes: a front fan blade frame 3, a rear fan blade frame 4, an axis hole 5, a rotating shaft 6, a fan blade 7, an adjustment gear 8, a first gear pair 9, a connecting ring 10, a transmission gear 11, a driving gear 12, a motor box 13, a driving motor 14 and a main shaft hole 15;

[0025] The shaft hole 5 is opened around the front fan blade frame 3 and the rear fan blade frame 4, the rotating shaft 6 is installed in the shaft hole 5, the fan blade 7 is connected to the rotating shaft 6, the adjusting gear 8 is sleeved on the other end of the rotating shaft 6, the first gear pair 9 is connected to the transmission gear 11 through the connecting ring 10, the main shaft hole 15 is opened on the rear of the fan frame 2 and on the first gear pair 9, the connecting ring 10 is installed in the main shaft hole 15, the motor box 13 is installed on the fan frame 2, the driving motor 14 is installed in the motor box 13, the driving gear 12 is sleeved on the output end of the driving motor 14 and meshes with the transmission gear 11, and the teeth of the first gear pair 9 are meshed with the adjusting gear 8.

[0026] It should be noted that when the angle of the fan blade 7 needs to be adjusted, the drive motor 14 is started, so that the drive gear 12 drives the transmission gear 11 to rotate. When the transmission gear 11 rotates, it drives the first gear pair 9 to rotate through the connecting ring 10. Then the first gear pair 9 can drive the adjusting gear 8 to rotate. The rotation of the adjusting gear 8 can drive the rotating shaft 6 and the fan blade 7 to rotate, so that the angle of the fan blade 7 can be adjusted.

[0027] As a preferred embodiment, further, the anti-rotation drive assembly includes: a rotating main shaft 16, a hollow shaft 17, a driving frame 18, a motor frame 19, a rotating motor 20, a main gear 21, a driving slot 22, a second gear pair 23 and a third gear pair 24;

[0028] The rotating main shaft 16 is rotatably connected between the fan housing 1 and the inner wall of the driving groove 22 and passes through the main shaft hole 15 and the connecting ring 10. The front fan blade frame 3 is sleeved on the rotating main shaft 16. The hollow shaft 17 is installed at the rear of the fan housing 1 and sleeved on the rotating main shaft 16. The rear fan blade frame 4 is sleeved on the hollow shaft 17. The driving frame 18 is installed on the outer wall of the fan housing 1. The motor frame 19 is installed on the driving frame 18. The rotating motor 20 is installed in the motor frame 19. The main gear 21 is sleeved on the output end of the rotating motor 20. The second gear pair 23 is sleeved on the hollow shaft 17. The third gear pair 24 is sleeved on the rotating main shaft 16. The second gear pair 23 and the third gear pair 24 are meshed with the main gear 21 at the same time.

[0029] It should be noted that when the fan needs to be started, the rotating motor 20 drives the main gear 21 to rotate, and then the main gear 21 simultaneously drives the second gear pair 23 and the third gear pair 24 to rotate, so that the rotating main shaft 16 and the hollow shaft 17 rotate in opposite directions at the same time, and then the front fan blade frame 3 and the rear fan blade frame 4 can be driven to start rotating in opposite directions. When the front fan blade frame 3 rotates, the blades 7 of the rear fan blade frame 4 rotate to strengthen the wind force of the fan blades 7 on the front fan blade frame 3.

[0030] Preferably, further, the transmission gear 11 is provided with an axial hole 5 .

[0031] It should be noted that the through-axis hole 5 is used for the rotating main shaft 16 and the hollow shaft 17 to pass through.

[0032] Preferably, the fan housing 1 is provided with air outlets at the front and rear.

[0033] It should be noted that the air outlet is used to blow out the airflow generated by the rotation of the fan blades 7.

[0034] Preferably, the fan blades 7 mounted on the front fan blade frame 3 and the rear fan blade frame 4 are arranged in opposite inclination directions.

[0035] It should be noted that, since the front fan blade frame 3 and the rear fan blade frame 4 rotate in opposite directions, turning the fan blades 7 to the opposite tilt direction can make the airflows blown out by the front fan blade frame 3 and the rear fan blade frame 4 blow out in the same direction.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coaxial counter-rotating two-stage fan mechanism, comprising a fan housing and a fan frame; the fan housing is used to support the mechanism components, characterized in that: The fan frame is provided with a fan blade adjustment component and a reverse rotation drive component; The fan blade adjustment assembly includes: a front fan blade frame, a rear fan blade frame, an axis hole, a rotating shaft, a fan blade, an adjustment gear, a first gear pair, a connecting ring, a transmission gear, a driving gear, a motor box, a driving motor and a main shaft hole; The shaft hole is opened around the front fan blade frame and the rear fan blade frame, the rotating shaft is installed in the shaft hole, the fan blades are connected to the rotating shaft, the adjusting gear is sleeved on the other end of the rotating shaft, the first gear pair is connected to the transmission gear through a connecting ring, the main shaft hole is opened behind the fan frame and on the first gear pair, the connecting ring is installed in the main shaft hole, the motor box is installed on the fan frame, the driving motor is installed in the motor box, the driving gear is sleeved on the output end of the driving motor and meshes with the transmission gear, and the teeth of the first gear pair are meshed with the adjusting gear.

2. A coaxial counter-rotating two-stage fan mechanism according to claim 1, characterized in that: The anti-rotation drive assembly comprises: a rotating main shaft, a hollow shaft, a drive frame, a motor frame, a rotating motor, a main gear, a drive slot, a second gear pair and a third gear pair; The rotating main shaft is rotatably connected between the fan casing and the inner wall of the driving groove and passes through the main shaft hole and the connecting ring. The front fan blade frame is sleeved on the rotating main shaft. The hollow shaft is installed at the rear of the fan casing and sleeved on the rotating main shaft. The rear fan blade frame is sleeved on the hollow shaft. The driving frame is installed on the outer wall of the fan casing. The motor frame is installed on the driving frame. The rotating motor is installed in the motor frame. The main gear is sleeved on the output end of the rotating motor. The second gear pair is sleeved on the hollow shaft. The third gear pair is sleeved on the rotating main shaft. The second gear pair and the third gear pair are meshed with the main gear at the same time.

3. The coaxial counter-rotating two-stage fan mechanism according to claim 1, characterized in that: The transmission gear is provided with an axial hole.

4. The coaxial counter-rotating two-stage fan mechanism according to claim 1, characterized in that: Air outlets are arranged at the front and rear of the fan housing.

5. The coaxial counter-rotating two-stage fan mechanism according to claim 1, characterized in that: The fan blades installed on the front fan blade frame and the rear fan blade frame are arranged in opposite inclination directions.

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