Fan blade

Abstract

The utility model discloses a fan blade, which belongs to the technical field of fans and comprises a blade wheel used for being connected with a driving shaft of an axial flow motor and a blade used for pushing air to flow, a rotating structure used for adjusting the angle of the blade on the blade wheel is arranged on the blade wheel and the blade, and the rotating structure comprises a fixed shaft arranged on the blade wheel. And the movable seat is rotationally mounted on the fixed shaft. According to the utility model, by starting the electric push rod, the adjusting ring can drive the plurality of linkage shafts to move, the moving linkage shafts can stir the linkage pieces and turn over the linkage pieces, and the turned linkage pieces can drive the movable seats and the blades to rotate, so that the angles of the plurality of blades can be adjusted at the same time; resistance borne by the blades during rotation can be reduced, the noise level of the fan is reduced while the air volume is guaranteed, the adjusting process is simple and rapid, manual operation is not needed, and the downtime is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and particularly relates to a fan blade. Background Art

[0002] Axial flow fan blades are one of the most critical components in a fan. They are responsible for accelerating air or gas in the axial direction and generating thrust. This thrust enables the gas to flow axially along the axial flow fan, achieving functions such as ventilation and air exchange.

[0003] When the angle of the fan blade increases, the angle of attack of the blade (i.e., the inclination angle of the blade relative to the oncoming flow direction) also increases accordingly. This increases the force-bearing area of the blade, thereby increasing the air volume and air pressure of the fan. By adjusting the blade angle, the performance curve of the fan can be optimized, enabling the fan to achieve the best operating effect under specific working conditions.

[0004] In the prior art, axial flow fan blades are mostly fixed with bolts, and the angle needs to be adjusted manually. The operation is rather cumbersome and time-consuming, which will prolong the shutdown time of the fan. Moreover, the center of gravity position of the fan blade is usually fixedly set, and the fixed center of gravity may cause unbalanced vibration and noise when the fan operates under different working conditions. Summary of the Utility Model

[0005] Aiming at the above-mentioned technical deficiencies, the purpose of the utility model is to provide a fan blade to solve some or all of the problems in the above background art.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A fan blade, comprising:

[0008] A blade wheel for connecting the drive shaft of an axial flow motor;

[0009] Blades for pushing air to flow;

[0010] A rotating structure arranged on the blade wheel and the blades for adjusting the angle of the blades on the blade wheel;

[0011] A center of gravity adjusting structure arranged on the blades for adjusting the center of gravity distribution of the blades;

[0012] Wherein, the center of gravity adjusting structure includes a counterweight assembly for increasing the weight of the blade, a moving assembly for adjusting the position of the counterweight assembly on the blade, and a linkage assembly for driving the operation of the moving assembly.

[0013] Preferably, the rotating structure includes:

[0014] A fixed shaft arranged on the blade wheel;

[0015] The movable seat is rotatably mounted on the fixed shaft;

[0016] The limiting collar is rotatably sleeved on the inner wall of the fixed shaft, and the movable seat is sleeved on the limiting collar to prevent the movable seat from disengaging;

[0017] The driving component is arranged on the movable seat to control the rotation of the movable seat;

[0018] Among them, the movable seat is mounted on the blade.

[0019] Preferably, the driving component includes:

[0020] The linkage member is arranged on one side of the movable seat;

[0021] The linkage hole is opened on the inner wall of the linkage member;

[0022] The linkage shaft is movably installed in the linkage shaft;

[0023] The guiding sliding hole is opened on the blade wheel, and the linkage shaft is slidably installed in the guiding sliding hole to limit the moving direction of the guiding sliding hole;

[0024] The adjusting ring is movably installed in the blade wheel, and the adjusting ring is arranged on the linkage shaft;

[0025] The electric push rod is arranged on the inner wall of the blade wheel, and the output end of the electric push rod is installed on one side of the adjusting ring to drive the adjusting ring to move;

[0026] Among them, the linkage member is rotatably mounted on the fixed shaft.

[0027] Preferably, the counterweight component includes a counterweight block slidably mounted on one side of the blade to increase the weight of the blade.

[0028] Preferably, the moving component includes:

[0029] The adjusting column is rotatably mounted on the inner wall of the counterweight block;

[0030] Two limiting baffles are respectively in contact with both sides of the counterweight block, and the two limiting baffles are respectively arranged at both ends of the adjusting column to prevent the adjusting column from loosening;

[0031] The adjusting screw rod is rotatably mounted on the blade wheel and the fixed shaft, and the adjusting column is threadedly sleeved on the adjusting screw rod;

[0032] The screw rod seat is arranged on one side of the blade, and one end of the adjusting screw rod is rotatably mounted on the screw rod seat to support the adjusting screw rod;

[0033] The guiding component is arranged on the adjusting column and the limiting baffle to guide the moving direction of the adjusting column and the limiting baffle.

[0034] Preferably, the guide assembly includes a U-shaped guide rod arranged on one side of the fixed shaft, the U-shaped guide rod is slidably mounted on the inner wall of the adjusting column and the limit baffle, and the U-shaped guide rod is rotatably mounted on the adjusting screw rod to prevent the adjusting column and the limit baffle from offsetting.

[0035] Preferably, the linkage component includes:

[0036] A bevel gear is arranged at one end of the adjusting screw;

[0037] The conical gear ring is rotatably mounted on the inner wall of the impeller and meshes with the conical gear for transmission;

[0038] A linkage gear ring is arranged on the inner wall of the conical gear ring;

[0039] The linkage gear is rotatably mounted on the inner wall of the impeller, and the linkage gear is meshed with the linkage gear ring for transmission;

[0040] The motor is arranged on the inner wall of the blade wheel, and the output end of the motor is arranged at one end of the linkage gear to drive the linkage gear to rotate.

[0041] The beneficial effects of the utility model are:

[0042] The utility model can make the adjustment ring drive multiple linkage shafts to move by turning on the electric push rod, and the moving linkage shaft can toggle the linkage part and flip it, and the flipped linkage part can drive the movable seat and the blades to rotate, so that the angles of multiple blades can be adjusted at the same time. By reasonably adjusting the blade angle, the resistance encountered by the blades during rotation can be reduced, and the noise level of the fan can be reduced while ensuring the air volume. The adjustment process is simple and quick, and no manual operation is required, which reduces downtime.

[0043] The utility model can adjust the position of the counterweight on one side of the blade by turning on the motor. The counterweight can be set away from the center of the blade or close to the center of the blade, thereby changing the centrifugal force when the blade rotates, so as to adjust the center of gravity of the blade according to different working conditions, making the blade more stable during rotation. In combination with adjusting the angle of the blade, the vibration generated by the blade when in use can be further reduced, and the position adjustment of the counterweight will not be affected by changes in the blade angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 Schematic structural diagram of a fan blade provided by an embodiment of the present utility model;

[0046] Figure 2 Side view structural diagram of a fan blade provided by an embodiment of the present utility model;

[0047] Figure 3 Schematic diagram of the blade structure of a fan blade provided by an embodiment of the present utility model;

[0048] Figure 4 Schematic cross-sectional structure diagram of a fan blade provided by an embodiment of the present utility model;

[0049] Figure 5 Schematic connection structure diagram of a linkage member of a fan blade provided by an embodiment of the present utility model;

[0050] Figure 6 Schematic structure diagram of an adjusting screw rod of a fan blade provided by an embodiment of the present utility model;

[0051] Figure 7 Schematic structure diagram of a conical gear ring of a fan blade provided by an embodiment of the present utility model.

[0052] Explanation of reference numerals:

[0053] 1. Blade wheel; 2. Blade; 3. Fixed shaft; 301. Movable seat; 302. Limit collar; 303. Linkage member; 304. Linkage hole; 305. Linkage shaft; 306. Guide sliding hole; 307. Adjusting ring; 308. Electric push rod; 4. Counterweight block; 401. Adjusting column; 402. Limit baffle; 403. Adjusting screw rod; 404. Screw rod seat; 405. U-shaped guide rod; 5. Bevel gear; 501. Conical gear ring; 502. Linkage gear ring; 503. Linkage gear; 504. Motor. Detailed implementation manners

[0054] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0055] Embodiment 1:

[0056] As Figures 1 to 7 shown, the present utility model provides a fan blade, including: a blade wheel 1 for connecting to the drive shaft of an axial flow motor, and a blade 2 for pushing air to flow.

[0057] In order to quickly adjust the angle of the blade 2 and eliminate the need for manual adjustment, a rotating structure for adjusting the angle of the blade 2 on the blade wheel 1 is arranged on the blade wheel 1 and the blade 2.

[0058] Among them, the rotating structure includes a fixed shaft 3 arranged on the blade wheel 1, a movable seat 301 rotatably installed on the fixed shaft 3, a limiting collar 302 rotatably sleeved on the inner wall of the fixed shaft 3 to prevent the movable seat 301 from detaching, the movable seat 301 is sleeved on the limiting collar 302, a driving component arranged on the movable seat 301 for controlling the rotation of the movable seat 301, the movable seat 301 is installed on the blade 2, and when the movable seat 301 rotates, it can drive the limiting collar 302 to rotate on the fixed shaft 3, and the rotating fixed shaft 3 will drive the blade 2 to rotate to adjust the angle of the blade 2.

[0059] Among them, the driving component includes a linkage member 303 arranged on one side of the movable seat 301, a linkage hole 304 opened on the inner wall of the linkage member 303, a linkage shaft 305 movably installed in the linkage shaft 305, a guiding sliding hole 306 opened on the blade wheel 1 for restricting the moving direction of the guiding sliding hole 306, the linkage shaft 305 is slidably installed in the guiding sliding hole 306, an adjusting ring 307 movably installed in the blade wheel 1, the adjusting ring 307 is arranged on the linkage shaft 305, an electric push rod 308 arranged on the inner wall of the blade wheel 1 for driving the adjusting ring 307 to move, the output end of the electric push rod 308 is installed on one side of the adjusting ring 307, the linkage member 303 is rotatably installed on the fixed shaft 3, and when the electric push rod 308 is turned on, it can drive the adjusting ring 307 to move. When the adjusting ring 307 moves, it will drive the linkage shaft 305 to slide, so that the linkage shaft 305 presses the linkage member 303 and makes it rotate, and the rotating linkage member 303 will drive the movable seat 301 to rotate.

[0060] Embodiment 2:

[0061] On the basis of Embodiment 1, in order to adjust the center of gravity position of the blade 2 and reduce vibration when the blade 2 vibrates, a center of gravity adjustment structure for adjusting the center of gravity distribution of the blade 2 is arranged on the blade 2. The center of gravity adjustment structure includes a weight component for increasing the weight of the blade 2, a moving component for adjusting the position of the weight component on the blade 2, and a linkage component for driving the moving component to operate.

[0062] Among them, the weight component includes a weight block 4 slidably installed on one side of the blade 2 for increasing the weight of the blade 2, and the center of gravity position of the blade 2 can be changed by moving the weight block 4.

[0063] Among them, the moving component includes an adjusting column 401 rotatably installed on the inner wall of the counterweight 4, two limiting baffles 402 respectively contacting the two sides of the counterweight 4 to prevent the loosening of the adjusting column 401, the two limiting baffles 402 are respectively arranged at both ends of the adjusting column 401, an adjusting screw rod 403 rotatably installed on the blade wheel 1 and the fixed shaft 3, the adjusting column 401 is threadedly sleeved on the adjusting screw rod 403, a screw rod seat 404 arranged on one side of the blade 2 to support the adjusting screw rod 403, one end of the adjusting screw rod 403 is rotatably installed on the screw rod seat 404, a guiding component arranged on the adjusting column 401 and the limiting baffle 402 to guide the moving direction of the adjusting column 401 and the limiting baffle 402. When the adjusting screw rod 403 rotates, it can drive the adjusting column 401 and the limiting baffle 402 to slide through the threaded cooperation with the adjusting column 401 and the limiting baffle 402, and the sliding limiting baffle 402 will drive the counterweight 4 to move on the blade 2.

[0064] Specifically, the guiding component includes a U-shaped guide rod 405 arranged on one side of the fixed shaft 3 to prevent the adjusting column 401 and the limiting baffle 402 from shifting. The U-shaped guide rod 405 is slidably installed on the inner walls of the adjusting column 401 and the limiting baffle 402, and the U-shaped guide rod 405 is rotatably installed on the adjusting screw rod 403. The sliding adjusting column 401 and limiting baffle 402 will slide on the U-shaped guide rod 405, thereby restricting their moving directions.

[0065] Among them, the linkage component includes a bevel gear 5 arranged at one end of the adjusting screw rod 403, a bevel gear ring 501 rotatably installed on the inner wall of the blade wheel 1 for transmission, the bevel gear ring 501 meshes with the bevel gear 5, a linkage gear ring 502 arranged on the inner wall of the bevel gear ring 501, a linkage gear 503 rotatably installed on the inner wall of the blade wheel 1 for transmission, the linkage gear 503 meshes with the linkage gear ring 502, a motor 504 arranged on the inner wall of the blade wheel 1 to drive the linkage gear 503 to rotate, the output end of the motor 504 is arranged at one end of the linkage gear 503, the output end of the motor 504 can drive the linkage gear 503 to rotate, and when the linkage gear 503 rotates, it can drive the bevel gear ring 501 to rotate, so that the bevel gear ring 501 can drive the adjusting screw rod 403 to rotate through the meshing with the bevel gear 5.

[0066] Working principle:

[0067] When the axial-flow motor drives the impeller 1 to rotate, the impeller 1 can drive the blades 2 to move in a circular motion to generate air flow. When the motor 504 is turned on, the output end of the motor 504 can drive the linkage gear 503 to rotate. When the linkage gear 503 rotates, it can drive the tapered gear ring 501 to rotate on the inner wall of the impeller 1 through meshing with the linkage gear 503. The rotating tapered gear ring 501 can drive the adjusting screw rod 403 to rotate through meshing with the bevel gear 5. The rotating adjusting screw rod 403 can drive the adjusting column 401 and the limit baffle 402 to slide through the threaded fit with the adjusting column 401 and the limit baffle 402. The continuously moving limit baffle 402 will drive the counterweight 4 to move on the blade 2, thereby changing the position of the counterweight 4 on the blade 2, changing the centrifugal force when the blade 2 rotates, so as to adjust the center of gravity of the blade 2 and reduce vibration. By turning on the electric push rod 308, it can drive the adjusting ring 307 to move. When the adjusting ring 307 moves, it will drive the linkage shaft 305 to slide in the guiding sliding hole 306, thereby restricting the moving direction of the linkage shaft 305. The continuously moving linkage shaft 305 will move in the linkage hole 304. At the same time, the linkage hole 304 will be squeezed by the movement of the linkage shaft 305, causing the linkage member 303 to rotate. The rotating linkage member 303 will drive the movable seat 301 to rotate, causing the movable seat 301 to drive the limit collar 302 to rotate on the fixed shaft 3, thereby preventing the movable seat 301 from loosening from the fixed shaft 3. The rotating fixed shaft 3 will then drive the blade 2 to rotate, thereby realizing the adjustment of the angle of the blade 2. During the flipping process of the blade 2, it will drive the screw rod seat 404 to rotate on the adjusting screw rod 403, and at the same time drive the counterweight 4 to rotate on the adjusting column 401, so that the position of the counterweight 4 will not be affected during the process of adjusting the angle of the blade 2, and it will not affect the subsequent position adjustment operation of the counterweight 4.

[0068] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. A wind turbine blade, characterized in that, Comprising: A blade wheel (1) for connecting to the drive shaft of an axial flow motor; Blades (2) for pushing air to flow; A rotating structure arranged on the blade wheel (1) and the blades (2) for adjusting the angle of the blades (2) on the blade wheel (1); A center of gravity adjusting structure arranged on the blades (2) for adjusting the center of gravity distribution of the blades (2); Wherein, the center of gravity adjusting structure includes a counterweight assembly for increasing the weight of the blades (2), a moving assembly for adjusting the position of the counterweight assembly on the blades (2), and a linkage assembly for driving the moving assembly to operate.

2. The wind turbine blade according to claim 1, wherein, The rotating structure includes: A fixed shaft (3) arranged on the blade wheel (1); A movable seat (301) rotatably mounted on the fixed shaft (3); A limiting collar (302) rotatably sleeved on the inner wall of the fixed shaft (3), and the movable seat (301) is sleeved on the limiting collar (302) to prevent the movable seat (301) from disengaging; A driving assembly arranged on the movable seat (301) for controlling the rotation of the movable seat (301); Wherein, the movable seat (301) is mounted on the blades (2).

3. A fan blade according to claim 2, characterized in that, The driving assembly includes: A linkage member (303) arranged on one side of the movable seat (301); A linkage hole (304) opened on the inner wall of the linkage member (303); A linkage shaft (305) movably mounted in the linkage shaft (305); A guiding sliding hole (306) opened on the blade wheel (1), and the linkage shaft (305) is slidably mounted in the guiding sliding hole (306) for restricting the moving direction of the guiding sliding hole (306); An adjusting ring (307) movably mounted in the blade wheel (1), and the adjusting ring (307) is arranged on the linkage shaft (305); An electric push rod (308) arranged on the inner wall of the blade wheel (1), and the output end of the electric push rod (308) is mounted on one side of the adjusting ring (307) for driving the adjusting ring (307) to move; Wherein, the linkage member (303) is rotatably mounted on the fixed shaft (3).

4. A fan blade according to claim 1, wherein, The counterweight assembly includes a counterweight block (4) slidably mounted on one side of the blades (2) for increasing the weight of the blades (2).

5. A fan blade according to claim 1, characterized in that, The moving assembly includes: An adjusting column (401) rotatably mounted on the inner wall of the counterweight block (4); Two limiting baffles (402) respectively contacting the two sides of the counterweight block (4), and the two limiting baffles (402) are respectively arranged at both ends of the adjusting column (401) for preventing the adjusting column (401) from loosening; An adjusting lead screw (403) rotatably mounted on the blade wheel (1) and the fixed shaft (3), and the adjusting column (401) is threadedly sleeved on the adjusting lead screw (403); A lead screw seat (404) arranged on one side of the blades (2), and one end of the adjusting lead screw (403) is rotatably mounted on the lead screw seat (404) for supporting the adjusting lead screw (403); A guiding assembly arranged on the adjusting column (401) and the limiting baffles (402) for guiding the moving direction of the adjusting column (401) and the limiting baffles (402).

6. A fan blade as claimed in claim 5, characterized in that, The guiding component includes a U-shaped guide rod (405) arranged on one side of a fixed shaft (3). The U-shaped guide rod (405) is slidably installed on the inner walls of an adjusting column (401) and a limiting baffle (402), and the U-shaped guide rod (405) is rotatably installed on an adjusting lead screw (403) to prevent the adjusting column (401) and the limiting baffle (402) from shifting.

7. A fan blade according to claim 1, characterized in that, The linkage component includes: A bevel gear (5) arranged at one end of the adjusting lead screw (403); A bevel gear ring (501) rotatably installed on the inner wall of the blade wheel (1). The bevel gear ring (501) meshes with the bevel gear (5) for transmission; A linkage gear ring (502) arranged on the inner wall of the bevel gear ring (501); A linkage gear (503) rotatably installed on the inner wall of the blade wheel (1). The linkage gear (503) meshes with the linkage gear ring (502) for transmission; A motor (504) arranged on the inner wall of the blade wheel (1). The output end of the motor (504) is arranged at one end of the linkage gear (503) to drive the linkage gear (503) to rotate.

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