Fan blade structure

Abstract

The utility model discloses a fan blade structure which comprises a blade body, a mounting portion is integrally formed at one end of the blade body, a mounting circular groove is formed in the center of the end, away from the blade body, of the mounting portion, a plurality of sawtooth-shaped key grooves are formed in the inner wall of the mounting circular groove at equal intervals, and the key grooves are used for being matched with keys on a fan hub. A mounting cavity is further formed in the middle of the mounting circular groove, the longitudinal section of the mounting cavity is in a linear shrinkage trend from the mounting part to the blade main body, and the tail of the mounting cavity is funnel-shaped, so that a bolt is inserted into the mounting cavity to fix the blade main body on the fan hub, and the mounting stability and reliability of the blade main body are improved; the front edge line and the rear edge line of the blade main body both tend to deviate towards one side of the central axis of the mounting part in the horizontal direction, the inlet path and the outlet path of airflow can be optimized, and the upper panel and the lower panel of the blade main body are both smooth streamline surfaces. The structure optimizes the flowing path of airflow and reduces noise generated when the blade body rotates.

Description

Technical Field

[0001] The utility model relates to the field of fan blades, in particular to a fan blade structure. Background Art

[0002] Industrial fans have strong wind output and can provide good heat dissipation effects. Therefore, they are widely used in factories to dissipate heat and cool objects. They can quickly and naturally cool down the objects. At the same time, they can most efficiently promote large amounts of air movement, generate ultra-large air volumes, and form a moving and circulating airflow field in the space, which can effectively regulate the air circulation problems in industrial production workshops.

[0003] In the prior art, industrial fan blades are generally radially distributed around the fan hub and fixed to the fan hub by bolts. However, when the industrial fan rotates at high speed for a long time, the bolts fixed to the fan hub may not be able to withstand the mechanical stress and vibration generated by the long-term high-speed rotation, causing the fan blades to loosen or fall off, affecting the stability and safety of the fan. In addition, when traditional fan blades are in operation, when high-speed airflow passes through the blades, due to defects in the blade structure design, airflow separation is likely to occur on the blade surface, forming vortices. The vortices generate unstable airflow around the fan blades, resulting in pressure fluctuations, causing the fan blades to generate large noise when running at high speed.

[0004] In order to solve this problem, we propose a fan blade structure. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention provides a fan blade structure that can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a fan blade structure for being installed on a fan hub, comprising: a blade body, a mounting portion integrally formed at one end of the blade body, a mounting circular groove being provided at the center of the end of the mounting portion away from the blade body, a plurality of serrated key grooves being equidistantly provided on the inner wall of the mounting circular groove, the key grooves being used to cooperate with the keys on the fan hub; a mounting cavity is also provided in the middle of the mounting circular groove, the longitudinal section of the mounting cavity showing a linear contraction trend from the mounting portion toward the blade body and the tail being funnel-shaped.

[0007] Preferably, a fixing ring is integrally formed on the side wall of the mounting portion, and the fixing ring is a tapered cylinder that gradually decreases linearly from the inner ring to the outer ring.

[0008] Preferably, the leading edge line and the trailing edge line of the blade body both tend to deviate toward one side of the central axis of the mounting portion in the horizontal direction.

[0009] Preferably, the leading edge line and the trailing edge line of the blade body are irregular curves, and the upper edge line and the lower edge line of the blade body are arcs.

[0010] Preferably, the blade body and the outer surface of the fixing ring are in smooth transition, and the upper panel and the lower panel of the blade body are both smooth streamlined surfaces.

[0011] Preferably, the leading edge line width of the blade body is smaller than the trailing edge line width of the blade body.

[0012] Compared with the prior art, the present invention provides a fan blade structure with the following beneficial effects:

[0013] The fan blade structure has a plurality of serrated keyways at equal intervals on the inner wall of the mounting circular groove, which cooperate with the keys on the fan hub to ensure that the blade body can rotate synchronously with the fan hub after installation; the longitudinal section of the mounting cavity has a linear contraction trend from the mounting portion toward the blade body and the tail is funnel-shaped, so that the bolts are inserted into the mounting cavity to fix the blade body on the fan hub, thereby improving the stability and reliability of the blade body installation; the leading edge line and the trailing edge line of the blade body both tend to deviate to one side of the central axis of the mounting portion in the horizontal direction, which helps to optimize the airflow entry and exhaust paths and reduce airflow separation and turbulence; the upper and lower panels of the blade body are both smooth streamlined surfaces. This structure optimizes the airflow path and reduces the noise generated when the blade body rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a fan blade structure of the present utility model.

[0015] Figure 2 This is a schematic cross-sectional view of a fan blade structure of the present invention.

[0016] Figure 3 This is a side view of a fan blade structure of the present invention.

[0017] Figure 4 This is a front view of a fan blade structure of the present invention.

[0018] Figure 5 This is a top view of a fan blade structure of the present invention.

[0019] In the figure: 1. Blade body; 11. Leading edge line; 12. Trailing edge line; 13. Upper edge line; 14. Lower edge line; 15. Upper panel; 16. Lower panel; 2. Mounting part; 21. Mounting circular groove; 22. Keyway; 23. Mounting cavity; 3. Fixing ring. DETAILED DESCRIPTION

[0020] To make the technical means, creative features, objectives, and effects of the present invention easier to understand, the present invention will be further described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0021] In order to address the shortcomings of existing technologies, such as Figure 1-Figure 5 As shown, the present invention provides a fan blade structure for installation on a fan hub, comprising: a blade body 1, a mounting portion 2 integrally formed at one end of the blade body 1, a mounting circular groove 21 being provided at the center of the end of the mounting portion 2 away from the blade body 1, a plurality of serrated key grooves 22 being equidistantly provided on the inner wall of the mounting circular groove 21, the key grooves 22 being adapted to engage with keys on the fan hub; a mounting cavity 23 being further provided in the middle of the mounting circular groove 21, the longitudinal cross-section of the mounting cavity 23 being linearly contracted from the mounting portion 2 toward the blade body 1, and the tail being funnel-shaped;

[0022] It should be noted that this structure is used to insert the bolts into the mounting cavity 23 to fix the blade body 1 to the fan hub, providing a stronger mechanical connection between the blade body 1 and the fan hub and improving the stability of the installation;

[0023] Among them, a plurality of serrated key slots 22 equidistantly provided on the inner wall of the mounting circular groove 21 are used to cooperate with the keys on the fan hub to ensure that the blade body 1 can rotate synchronously with the fan hub after installation to prevent slipping. This structure increases the contact surface and friction between the blade body 1 and the fan hub, thereby improving the stability of the installation;

[0024] Specifically, such as Figure 1 、 Figure 2 、 Figure 3 As shown, a fixing ring 3 is integrally formed on the side wall of the mounting portion 2. The fixing ring 3 is a tapered cylinder that gradually decreases linearly from the inner circle to the outer circle. This structure enables the blade body 1 to reduce the separation and turbulence of the airflow at the connection between the blade body 1 and the fan hub when the blade body 1 is in operation, so as to optimize the flow path of the airflow.

[0025] Specifically, such as Figure 5 As shown, the leading edge line 11 and the trailing edge line 12 of the blade body 1 tend to be offset to one side of the central axis of the mounting portion 2 in the horizontal direction, which helps to optimize the entry and exhaust paths of the airflow and the flow path of the airflow to reduce the noise generated when the blade body 1 rotates.

[0026] Specifically, such as Figure 1 、 Figure 2As shown, the leading edge line 11 and the trailing edge line 12 of the blade body 1 are irregular curves, the upper edge line 13 and the lower edge line 14 of the blade body 1 are arcs, the outer surface of the blade body 1 and the fixing ring 3 have a smooth transition, and the upper panel 15 and the lower panel 16 of the blade body 1 are both smooth and streamlined surfaces. The smooth and streamlined surfaces can effectively reduce aerodynamic noise and improve user comfort.

[0027] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A fan blade structure for mounting on a fan hub, characterized in that: include: A blade body (1) is provided, wherein one end of the blade body (1) is integrally formed with a mounting portion (2); a mounting circular groove (21) is provided at the center of the end of the mounting portion (2) away from the blade body (1); a plurality of sawtooth-shaped key grooves (22) are provided at equal intervals on the inner wall of the mounting circular groove (21); the key grooves (22) are used to cooperate with keys on a fan hub; a mounting cavity (23) is also provided in the middle of the mounting circular groove (21); a longitudinal section of the mounting cavity (23) is linearly contracted from the mounting portion (2) toward the blade body (1), and the tail portion is funnel-shaped.

2. A fan blade structure according to claim 1, characterized in that: A fixing ring (3) is integrally formed on the side wall of the mounting portion (2), and the fixing ring (3) is a tapered cylinder that gradually decreases linearly from the inner ring to the outer ring.

3. The fan blade structure according to claim 1, characterized in that: The leading edge line (11) and the trailing edge line (12) of the blade body (1) both tend to deviate toward one side of the central axis of the mounting portion (2) in the horizontal direction.

4. A fan blade structure according to claim 3, characterized in that: The leading edge line (11) and the trailing edge line (12) of the blade body (1) are irregular curves, and the upper edge line (13) and the lower edge line (14) of the blade body (1) are arcs.

5. The fan blade structure according to claim 1, characterized in that: The outer surfaces of the blade body (1) and the fixing ring (3) are in smooth transition, and the upper panel (15) and the lower panel (16) of the blade body (1) are both smooth streamlined surfaces.

6. The fan blade structure according to claim 5, characterized in that: The width of the leading edge line (11) of the blade body (1) is smaller than the width of the trailing edge line (12) of the blade body (1).

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