An adjustable axial flow fan

Abstract

The utility model provides an axial flow fan with adjustable moving blades, comprising a casing, a spoke one being arranged inside the casing, an output motor being mounted on the spoke one, a blade shaft being arranged at the output end of the output motor, a plurality of blades being arranged in a circular array on the blade shaft, a mounting plate being detachably arranged on the outer side of the blade shaft, a rotation groove and a limit groove being arranged on the mounting plate and the blade shaft, a mounting shaft being arranged at the tail of the blade, a limit ring being arranged on the mounting shaft, the mounting shaft and the limit ring being arranged in the rotation groove and the limit groove, the mounting shaft and the blade shaft being rotationally matched, the position of the blade being limited by clamping the mounting shaft through the cooperation between the mounting plate and the blade shaft, and through the cooperation between the limit ring and the limit groove, the blade being fixed on the blade shaft, the blade being driven to rotate through a power source one, thereby adjusting the inclination angle of the blade, thereby optimizing the air volume and efficiency, and making the axial flow fan adaptable to different occasions.

Description

Technical Field

[0001] The utility model relates to a fan, in particular to an axial flow fan with adjustable moving blades. Background Art

[0002] An axial flow fan is a fan whose output airflow is in the same direction as the fan blade axis. It is usually used in vents in factories, warehouses, etc. It can also be used for forced ventilation of air coolers, air conditioner outdoor units, and condensers. Usually the blades are tilted on the fan blade axis to ensure that the air is accelerated and airflow is formed. The greater the blade tilt angle, the stronger the airflow generated, and the required energy liquid is correspondingly reduced. However, the greater the blade tilt angle, the greater the noise, so the blade angle needs to be adjusted to balance the relationship between noise and performance.

[0003] At present, a Chinese patent with announcement number CN217206927U discloses an axial flow fan, including a fan frame and a middle tube, the fan frame has a cylindrical outer shell, spokes are installed in the outer shell, a mounting seat is arranged in the middle of the spokes, the mounting seat has a mounting hole, the middle tube is installed in the mounting hole, a rotatable axial flow fan impeller is arranged on the middle tube, the axial flow fan impeller is provided with a stator assembly and a rotor assembly, an inner hole is arranged in the middle of the middle tube, a core shaft is arranged in the inner hole, an impeller hub is arranged on the core shaft, and blades are fixedly arranged on the impeller hub.

[0004] The above patent still has shortcomings. The above axial flow fan cannot be used in multiple occasions. The air volume required in different environments and working conditions is different, and the noise and voltage that can be tolerated are also different. When the hub and the blades are fixedly connected, it is impossible to increase the air volume while avoiding increasing the noise. Utility Model Content

[0005] In view of this, the utility model aims to provide an axial flow fan with adjustable moving blades, which has the function of adjustable blades.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: an axial flow fan with adjustable moving blades, comprising a casing, a spoke one is arranged inside the casing, an output motor is installed on the spoke one, a fan blade shaft is arranged at the output end of the output motor, a plurality of blades are arranged in a circular array on the fan blade shaft, a mounting plate is detachably arranged on the outer side of the fan blade shaft, a rotation groove and a limit groove are provided on the mounting plate and the fan blade shaft, a mounting shaft is arranged at the tail of the blade, a limit ring is also arranged on the mounting shaft, the mounting shaft and the limit ring are arranged in the rotation groove and the limit groove, the mounting shaft and the fan blade shaft are rotatably matched, and a power source one for driving the blade to rotate is also arranged at the side end of the fan blade shaft.

[0007] Through the above-mentioned technical means, through the cooperation between the mounting plate and the fan blade shaft, and through the cooperation between the limit ring and the limit groove, the position of the blade is limited by clamping the mounting shaft, so that the blade is fixed on the fan blade shaft, and the blade is driven to rotate by a power source to adjust the inclination angle of the blade, thereby optimizing the air volume and efficiency, so that the axial flow fan can adapt to different occasions.

[0008] Preferably, the limiting ring is in the shape of a semicircular ring, and a through hole 1 is further provided at a position corresponding to the limiting ring on the mounting plate. The power source 1 comprises a linear electric cylinder 1, a linear electric cylinder 2, a plurality of rotating rods 1 and a plurality of rotating rods 2. The linear electric cylinder 1 drives the rotating rod 1 to move in the through hole 1 and abut against one end of the limiting ring, and the linear electric cylinder 2 drives the rotating rod 2 to move in the through hole 1 and abut against the other end of the limiting ring.

[0009] Through the above technical means, the two ends of the limit ring are pressed against by the linear electric cylinder 1 and the linear electric cylinder 2, so as to adjust the rotation angle of the blade, and at the same time limit the position of the fan shaft when it rotates, thereby increasing the stability of the blade.

[0010] Preferably, the rotating rod 1 and the rotating rod 2 are in the shape of an elliptical cylinder, and arc-shaped abutment surfaces are arranged at the bottom of the rotating rod 1 and the rotating rod 2.

[0011] Through the above technical means, the contact area between the rotating rod 1, the rotating rod 2 and the limiting ring is increased through the arc-shaped abutment surface, thereby reducing wear.

[0012] Preferably, a countersunk hole is provided in the middle of the mounting plate, the power source 1 also includes abutment plate 1 and abutment plate 2, the abutment plate 1 and abutment plate 2 are arranged in the countersunk hole, a number of the rotating rods 1 are installed on the abutment plate 1, a number of the rotating rods 2 are installed on the abutment plate 2, the abutment plate 1 is also provided with a through hole 2 for the rotating rods 2 to pass through, the linear electric cylinder 1 drives the abutment plate 1 to move up and down, and the linear electric cylinder 2 drives the abutment plate 2 to move up and down.

[0013] Through the above technical means, the plurality of rotating rods 1 and 2 are moved simultaneously through the abutment plates 1 and 2, so that the blades rotate simultaneously, and the interference between the rotating rods 2 and the abutment plate 1 is prevented through the through hole 2.

[0014] Preferably, a clamping strip is provided at the inner side wall of the countersunk hole, and a clamping groove is provided at the side ends of the first and second abutment plates, and the clamping strip is clamped into the clamping groove.

[0015] Through the above technical means, through the cooperation between the card strip and the card slot, the fan blade shaft drives the abutment plates 1 and 2 to rotate simultaneously, so that the positions of the rotating rods 1 and 2 are kept consistent with the limit ring, and the movement accuracy of the abutment plates 1 and 2 is increased.

[0016] Preferably, spoke 2 is further provided inside the housing, a base plate is provided in the middle of spoke 2, the base plate is provided at the front end of the mounting plate, the linear electric cylinder 1 and the linear electric cylinder 2 are fixedly provided on the base plate, a through hole 3 is provided at the center of the abutment plate 2, the output shaft of the linear electric cylinder 1 passes through the through hole 3 and abuts against the abutment plate 1, the linear electric cylinder 2 is provided at the side end of the linear electric cylinder 1, and its output shaft abuts against the abutment plate 2.

[0017] Through the above-mentioned technical means, by arranging the linear electric cylinder 1 and the linear electric cylinder 2 on the base plate, and making their output shafts abut against the abutment plates 1 and 2, the linear electric cylinder 1 and the linear electric cylinder 2 can be fixed while controlling the movement of the abutment plates 1 and 2, so that the linear electric cylinder 1 and the linear electric cylinder 2 do not rotate with the fan shaft, thereby reducing the possibility of damage to the linear electric cylinder 1 and the linear electric cylinder 2.

[0018] Preferably, a bearing is sleeved on the output shaft of the linear electric cylinder one, the outer ring of the bearing is fixed to the abutment plate one, an annular groove is opened on the abutment plate two, and a ball is embedded on the output shaft of the linear electric cylinder two, and the ball rolls in the annular groove.

[0019] Through the above technical means, the friction between the output shafts of the linear electric cylinder 1 and the linear electric cylinder 2 and the abutment plates 1 and 2 is reduced through bearings and balls, thereby reducing wear and increasing service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structure of the embodiment is shown in FIG. Figure 1 ;

[0021] Figure 2 The structure of the embodiment is shown in FIG. Figure 2

[0022] Figure 3 is a cross-sectional schematic diagram of an embodiment;

[0023] Figure 4 A partial cross-sectional view of an embodiment Figure 1 ;

[0024] Figure 5 An exploded schematic diagram of an embodiment;

[0025] Figure 6 It is a structural schematic diagram of the mounting plate;

[0026] Figure 7 A partial cross-sectional view of an embodiment Figure 2 ;

[0027] Figure 8 It is a partial exploded view of the embodiment.

[0028] Figure numerals: 1, housing; 2, spoke 1; 3, output motor; 4, fan blade shaft; 5, blade; 6, mounting plate; 7, rotating groove; 8, limiting groove; 9, mounting shaft; 10, limiting ring; 11, through hole 1; 12, spoke 2; 13, base plate; 14, linear electric cylinder 1; 15, linear electric cylinder 2; 16, abutment plate 1; 17, abutment plate 2; 18, rotating rod 1; 19, rotating rod 2; 20, countersunk hole; 21, clamping strip; 22, clamping groove; 23, through hole 2; 24, through hole 3; 25, arc-shaped abutment surface; 26, bearing; 27, ring groove; 28, ball. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0030] A kind of axial flow fan with adjustable moving blades comprises a casing 1, a spoke 2 is arranged inside the casing 1, an output motor 3 is installed on the spoke 2, a blade shaft 4 is arranged at the output end of the output motor 3, a plurality of blades 5 are arranged in a circular array on the blade shaft 4, a mounting plate 6 is detachably arranged on the outer side of the blade shaft 4 by screws, half of a rotation groove 7 and a limiting groove 8 are opened on the mounting plate 6 and the blade shaft 4, a mounting shaft 9 is arranged at the tail of the blade 5, a limiting ring 10 is also arranged on the mounting shaft 9, the mounting shaft 9 and the limiting ring 10 are arranged in the rotation groove 7 and the limiting groove 8, when installing the blade 5, the blade 5 is first placed in the groove of the blade shaft 4, and then the mounting plate 6 is covered on the mounting shaft 9, so that the blade 5 rotates in the rotation groove 7 while preventing it from separating from the blade shaft 4, the limiting ring 10 is in the shape of a semicircle, a through hole 11 is opened at the position corresponding to the limiting ring 10 on the mounting plate 6, and a power source 1 for driving the blade 5 to rotate is also arranged at the side end of the blade shaft 4.

[0031] A spoke 2 12 is also provided inside the casing 1, a base plate 13 is provided in the middle of the spoke 2 12, and the base plate 13 is provided at the front end of the mounting plate 6. The power source 1 includes a linear electric cylinder 14, a linear electric cylinder 2 15, a plate 16, a plate 2 17, a plurality of rotating rods 18 and a plurality of rotating rods 2 19. The number of rotating rods 18 and 19 is consistent with the number of blades 5, and the preferred number is five. The linear electric cylinder 14 and the linear electric cylinder 2 15 are fixedly arranged on the base plate 13, and a countersunk hole 20 is also provided in the middle of the mounting plate 6. The plate 1 16 and the plate 2 17 are arranged in the countersunk hole 20, and a clamping strip 21 is provided at the inner side wall of the countersunk hole 20. The side ends of the plate 1 16 and the plate 2 17 are both provided with a clamping groove 22, and the clamping strip 21 is clamped into the clamping groove 22. When the fan shaft 4 rotates, the clamping groove 22 and the clamping strip 21 cooperate to make the plate 1 16 and the plate 2 17 rotate together with the fan shaft 4.

[0032] A through hole three 24 is provided at the center of the abutment plate 17, and the output shaft of the linear electric cylinder 14 passes through the through hole three 24 and abuts against the abutment plate 16. The linear electric cylinder 15 is arranged at the side end of the linear electric cylinder 14, and its output shaft abuts against the abutment plate 17. The rotating rod 18 is installed on the abutment plate 16, and the rotating rod 2 19 is installed on the abutment plate 17. The abutment plate 16 is also provided with a through hole 23 for the rotating rod 2 19 to pass through. The rotating rod 18 moves in the through hole 11 and abuts against one end of the limit ring 10, and the linear electric cylinder 15 drives the rotating rod 2 19 to move in the through hole 11 and abut against the other end of the limit ring 10.

[0033] When the linear electric cylinder 14 drives the abutment plate 16 to move toward the limit ring 10, the rotating rod 18 abuts against the limit ring 10 and makes the limit ring 10 rotate clockwise. At this time, the linear electric cylinder 2 15 needs to move in the opposite direction to make the rotating rod 2 19 retreat. When the linear electric cylinder 2 15 drives the abutment plate 2 17 to move toward the limit ring 10, the linear electric cylinder 14 moves in the opposite direction to make the limit ring 10 rotate counterclockwise, thereby realizing the rotation of the blade 5.

[0034] The rotating rod 18 and the rotating rod 2 19 are in the shape of an elliptical cylinder, and arc-shaped abutment surfaces 25 are arranged at the bottom of the rotating rod 18 and the rotating rod 2 19. The arc-shaped abutment surfaces 25 increase the contact area between the rotating rod 18, the rotating rod 2 19 and the limit ring 10, thereby reducing wear.

[0035] A bearing 26 is sleeved on the output shaft of the linear electric cylinder 14, and the outer ring of the bearing 26 is fixed to the back plate 16. An annular groove 27 is opened on the back plate 27. A ball 28 is embedded on the output shaft of the linear electric cylinder 2 15, and the ball 28 rolls in the annular groove 27. When the fan blade shaft 4 rotates, the output shaft of the linear electric cylinder 14 rotates with the back plate 16 through the bearing 26, and the ball 28 on the output shaft of the linear electric cylinder 2 15 rolls in the annular groove 27, thereby reducing the friction. When the linear electric cylinder 14 is pushed downward and the linear electric cylinder 2 15 is retracted upward, the back plate 16 drives the rotating rod 18 to move downward, so that the limit ring 10 flips. At this time, the limit ring 10 automatically pushes the rotating rod 2 19 and the back plate 2 17 to move upward. When the fan blade shaft 4 is rotating, the angle adjustment of the blade 5 can also be completed to avoid wasting time by stopping. The control system for controlling the output distance of the linear electric cylinder 14 and the linear electric cylinder 2 15 is a prior art and is not disclosed here.

[0036] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. An axial flow fan with adjustable moving blades, comprising a casing (1), a spoke (2) disposed inside the casing (1), an output motor (3) mounted on the spoke (2), a fan shaft (4) disposed at the output end of the output motor (3), a plurality of blades (5) arranged in a circular array on the fan shaft (4), wherein: A mounting plate (6) is detachably provided on the outer side of the fan blade shaft (4); a rotation groove (7) and a limit groove (8) are provided on the mounting plate (6) and the fan blade shaft (4); a mounting shaft (9) is provided at the tail of the blade (5); a limit ring (10) is provided on the mounting shaft (9); the mounting shaft (9) and the limit ring (10) are arranged in the rotation groove (7) and the limit groove (8); the mounting shaft (9) and the fan blade shaft (4) are rotatably matched; and a power source for driving the blade (5) to rotate is also provided at the side end of the fan blade shaft (4).

2. The axial flow fan with adjustable moving blades according to claim 1 is characterized in that: The limiting ring (10) is in the shape of a semicircular ring. A through hole (11) is also provided on the mounting plate (6) at a position corresponding to the limiting ring (10). The power source (1) comprises a linear electric cylinder (14), a linear electric cylinder (15), a plurality of rotating rods (18) and a plurality of rotating rods (19). The linear electric cylinder (14) drives the rotating rod (18) to move in the through hole (11) and abut against one end of the limiting ring (10). The linear electric cylinder (15) drives the rotating rod (19) to move in the through hole (11) and abut against the other end of the limiting ring (10).

3. The axial flow fan with adjustable moving blades according to claim 2 is characterized in that: The rotating rod 1 (18) and the rotating rod 2 (19) are in the shape of an elliptical cylinder, and arc-shaped abutment surfaces (25) are arranged at the bottom of the rotating rod 1 (18) and the rotating rod 2 (19).

4. The axial flow fan with adjustable moving blades according to claim 2 is characterized in that: A countersunk hole (20) is also provided in the middle of the mounting plate (6), and the power source one also includes a first plate (16) and a second plate (17), wherein the first plate (16) and the second plate (17) are arranged in the countersunk hole (20), a plurality of the first rotating rods (18) are installed on the first plate (16), and a plurality of the second rotating rods (19) are installed on the second plate (17), and a through hole two (23) is also provided on the first plate (16) for the second rotating rods (19) to pass through, the first linear electric cylinder (14) drives the first plate (16) to move up and down, and the second linear electric cylinder (15) drives the second plate (17) to move up and down.

5. The axial flow fan with adjustable moving blades according to claim 4 is characterized in that: A clamping strip (21) is arranged on the inner side wall of the countersunk hole (20), and a clamping groove (22) is provided on the side ends of the first abutment plate (16) and the second abutment plate (17), and the clamping strip (21) is clamped into the clamping groove (22).

6. The axial flow fan with adjustable moving blades according to claim 5 is characterized in that: The housing (1) is also provided with spoke 2 (12) inside, a base plate (13) is provided in the middle of the spoke 2 (12), the base plate (13) is provided at the front end of the mounting plate (6), the linear electric cylinder 1 (14) and the linear electric cylinder 2 (15) are fixedly provided on the base plate (13), the center of the abutment plate 2 (17) is provided with a through hole 3 (24), the output shaft of the linear electric cylinder 1 (14) passes through the through hole 3 (24) and abuts against the abutment plate 1 (16), the linear electric cylinder 2 (15) is provided at the side end of the linear electric cylinder 1 (14), and its output shaft abuts against the abutment plate 2 (17).

7. The axial flow fan with adjustable moving blades according to claim 6 is characterized in that: A bearing (26) is sleeved on the output shaft of the linear electric cylinder (14), the outer ring of the bearing (26) is fixed to the first abutment plate (16), an annular groove (27) is provided on the second abutment plate (17), and a ball (28) is embedded on the output shaft of the second linear electric cylinder (15), and the ball (28) rolls in the annular groove (27).

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