Fan blade

Abstract

The invention relates to the technical field of design and manufacturing of blades in fan equipment, and discloses a fan blade which comprises a plurality of mounting plates and a base plate, a plurality of blade bodies are rotationally connected to the peripheries of the tops of the mounting plates and the base plate, and sound absorption layers are fixedly connected to the outer walls of the blade bodies. Reinforcing ribs are fixedly connected to the upper sides and the lower sides of the interiors of the multiple blade bodies correspondingly, sound absorption particles are fixedly connected to the outer walls of the multiple sound absorption layers correspondingly, holes are formed between the adjacent sound absorption particles correspondingly, and a top disc is arranged at the tops of the multiple blade bodies on the upper side. Through the three-dimensional curved surface optimization technology and the edge smoothing treatment of the blade body, the running resistance is effectively reduced, the wind energy utilization efficiency is improved, the noise can be remarkably reduced through the sound absorption layer and the sound absorption particles, the fan runs more quietly and stably through the multi-layer sound absorption structure, the performance and reliability of the fan are improved on the whole, and the fan is suitable for various scenes needing the fan.

Description

Technical Field

[0001] The invention relates to the technical field of blade design and manufacturing in fan equipment, in particular to a fan blade. Background Art

[0002] Currently, in wind power generation and other aerodynamic applications, the design and performance of wind turbine blades are crucial to the efficiency of the entire system. With the growth of energy demand and technological advancement, the market demand for high-efficiency, low-noise and long-life wind turbine blades is increasing.

[0003] The traditional blade shape is designed based on early aerodynamic theory and does not fully consider the achievements of modern fluid mechanics. When the fan rotates, a large amount of air will be lost, resulting in a low energy efficiency conversion rate of the fan. The existing technology uses new composite materials, optimizes blade geometry and adopts active control systems. Although it can improve the energy efficiency conversion rate, the electronic equipment used is expensive, resulting in high production costs and complex implementation, which limits large-scale applications. In addition, the existing device has the problem of friction with the airflow when the blades rotate at high speed, resulting in high noise. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a fan blade, which solves the problem in the prior art that when the blade rotates at high speed, it generates friction with the airflow, resulting in high noise.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a fan blade, comprising multiple mounting plates and a chassis, multiple mounting plates and multiple blade bodies are rotatably connected around the top of the chassis, multiple outer walls of the blade bodies are fixedly connected with sound absorbing layers, multiple inner upper and lower sides of the blade bodies are fixedly connected with reinforcing ribs, multiple outer walls of the sound absorbing layers are fixedly connected with sound absorbing particles, gaps are opened between adjacent sound absorbing particles, a top plate is provided on the top of the multiple blade bodies on the upper side, the multiple blade bodies on the upper side are rotatably connected to the top plate, and an adjustment mechanism is provided on the top.

[0006] Preferably, the adjustment mechanism includes a plurality of connecting rods, and the plurality of connecting rods are respectively fixedly connected to the tops of the plurality of blade bodies, the tops of the plurality of connecting rods are fixedly connected with hexagonal prisms, the bottoms of the plurality of blade bodies are fixedly connected with connecting sleeves, the plurality of connecting sleeves are respectively engaged with the corresponding hexagonal prisms, the tops of the plurality of hexagonal prisms at the top pass through the top plate and are fixedly connected with pinions, an annular groove is opened on the top of the top plate, the inner wall of the annular groove is rotatably connected with an internal gear ring, the plurality of annular grooves are meshed with the internal gear ring, the top of the internal gear ring is rotatably connected with a rotating handle, and a locking mechanism is provided on the top of the adjustment mechanism.

[0007] Preferably, the locking mechanism includes a fixed frame, which is fixedly connected to the right side of the top of the inner gear ring, a sliding rod is slidably connected to the inner wall of the fixed frame, a fixed block is fixedly connected to the top of the sliding rod, a limiting ring is fixedly connected to the middle part of the outer wall of the sliding rod, a spring is provided on the outside of the sliding rod, the top of the spring is fixedly connected to the top of the inner wall of the fixed frame, the bottom end of the spring is fixedly connected to the limiting ring, a plurality of positioning holes are opened on the right side of the top of the inner gear ring, and the sliding rod is slidably connected to the positioning hole in the middle.

[0008] Preferably, the upper and lower sides of the outer walls of the plurality of mounting plates are fixedly connected with anti-corrosion layers, the plurality of anti-corrosion layers and the outer wall tops of the chassis are provided with reserved holes around them, and the plurality of blade bodies are rotatably connected to the corresponding reserved holes respectively.

[0009] Preferably, multiple mounting plates are threadedly connected to the inner wall of the chassis with bolts, multiple mounting plates and upper and lower sides of the outer wall of the chassis are provided with nuts, and multiple nuts are threadedly connected to the bolts.

[0010] Preferably, an annular locking plate is provided on the top of the top plate and the bottom of the bottom plate, and the outer walls of the two annular locking plates are threadedly connected with screws one on all sides, the upper annular locking plate is threadedly connected to the top plate through multiple screws one on the upper side, and the lower annular locking plate is threadedly connected to the bottom plate through multiple screws one on the lower side, and the outer walls of the two annular locking plates are fixedly connected with wear-resistant rings.

[0011] Preferably, an information plate is provided at the rear side of the bottom of the chassis, and two screws are threadedly connected to the outer wall of the information plate around four sides, and the information plate is threadedly connected to the chassis through the two screws.

[0012] Preferably, a plum blossom slot is formed in the middle of the bottom ends of the plurality of information plates, and a cross slot is formed on the tops of the plurality of screws.

[0013] Preferably, an anti-skid pad is fixedly connected to the outer wall of the rotating handle, and anti-slip blocks are fixedly connected to the outer wall of the anti-skid pad on all sides.

[0014] Preferably, a filter screen is provided on the inner wall of the top plate, and screw three is threadedly connected to the left and right sides of the top of the filter screen, and the filter screen is threadedly connected to the top plate through the screw three.

[0015] The present invention provides a fan blade having the following beneficial effects: 1. The present invention effectively reduces the operating resistance and improves the efficiency of wind energy utilization through the three-dimensional surface optimization technology and edge smoothing of the blade body. The sound-absorbing layer and the sound-absorbing particles can significantly reduce noise, create a quiet environment, reduce noise pollution, strengthen the ribs to enhance the structural strength of the blade, prevent deformation and damage, extend the life of the blade, and reduce maintenance costs. The multi-level sound-absorbing structure makes the fan run more quietly and smoothly, which improves the performance and reliability of the fan as a whole, has good economic and environmental benefits, and is suitable for various scenarios requiring fans.

[0016] 2. The present invention drives the internal gear ring to rotate precisely in the annular groove by rotating the handle. The internal gear ring transmits torque to each pinion by meshing with the pinion. The pinion is fixedly connected to the hexagonal prism, and the hexagonal prism forms a stable connection with the blade body with the help of a connecting sleeve, so that the operator can accurately adjust the blade angle to ensure that the fan can always maintain the best performance no matter how complex the working conditions are, greatly improving the performance and reliability of the fan, while having good economic and environmental benefits, and is widely applicable to various different fan application scenarios.

[0017] 3. In the present invention, the fixed block provides a fulcrum for the operator, which facilitates the operation of the sliding rod to lock and unlock. Pulling the fixed block upward or pressing it downward can flexibly respond to different initial states, ensure that the sliding rod moves accurately to disengage or insert into the positioning hole, and realize the release or locking of the restriction on the blade angle adjustment. The elastic potential energy of the spring is cleverly utilized to make the operation more convenient and have an automatic reset function, accurately limit the rotational freedom of the inner gear ring, and effectively prevent the blade body angle from changing unexpectedly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention; Figure 2 It is a partial structural split diagram of the present invention; Figure 3 is a cross-sectional view of a blade body of the present invention; Figure 4 for Figure 3 A magnified image of point A; Figure 5 It is a schematic diagram of the adjustment mechanism of the present invention; Figure 6 It is a schematic diagram of the locking mechanism of the present invention; Figure 7 A bottom view of the present invention; Figure 8 for Figure 7 The enlarged view of point B; Fig. 9 It is a schematic diagram of a bolt of the present invention.

[0019] Among them, 1. mounting plate; 2. adjustment mechanism; 201. connecting rod; 202. hexagonal prism; 203. connecting sleeve; 204. pinion; 205. annular groove; 206. inner gear ring; 207. turning handle; 3. locking mechanism; 301. fixing frame; 302. sliding rod; 303. fixing block; 304. limiting ring; 305. spring; 306. positioning hole; 4. blade body; 5. sound absorbing layer; 6. reinforcing ribs; 7. sound absorbing particles; 8. pores; 9. top plate; 10. bottom plate; 11. anti-corrosion layer; 12. reserved holes; 13. bolts; 14. nuts; 15. annular locking plate; 16. screw one; 17. wear-resistant ring; 18. information plate; 19. screw two; 20. plum blossom slot; 21. cross slot; 22. anti-skid pad; 23. anti-sliding block; 24. filter; 25. screw three. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Please refer to the attached Figure 1 , Attachment Figure 2 and attached Figure 4 The embodiment of the present invention provides a fan blade, comprising a plurality of mounting plates 1 and a chassis 10, wherein the plurality of mounting plates 1 and the top of the chassis 10 are rotatably connected with a plurality of blade bodies 4, the outer walls of the plurality of blade bodies 4 are fixedly connected with sound absorbing layers 5, the inner upper and lower sides of the plurality of blade bodies 4 are fixedly connected with reinforcing ribs 6, the outer walls of the plurality of sound absorbing layers 5 are fixedly connected with sound absorbing particles 7, gaps 8 are provided between adjacent plurality of sound absorbing particles 7, a top plate 9 is provided on the top of the plurality of blade bodies 4 on the upper side, the plurality of blade bodies 4 on the upper side are rotatably connected with the top plate 9, and an adjustment mechanism 2 is provided on the top of the upper mounting plate 1.

[0022] Specifically, multiple mounting plates 1 are rotatably connected to multiple blade bodies 4 on all sides of the top of the chassis 10. This rotatable connection method allows the blade bodies 4 to rotate flexibly when affected by wind, ensuring stable operation of the fan and effectively improving the efficiency of wind energy utilization. The blade bodies 4 adopt three-dimensional curved surface optimization technology and edge smoothing treatment, which reduces the occurrence of airflow separation and further reduces the operating resistance. The outer walls of the multiple blade bodies 4 are firmly fixedly connected with sound absorbing layers 5, and the sound absorbing layers 5 are made of advanced sound absorbing materials. When the fan generates noise during operation, the sound absorbing layers 5 can effectively absorb the vibration of the blade bodies 4 and the noise generated by the interaction with the airflow, significantly reducing the noise level when the fan is running, creating a quiet atmosphere for the surrounding environment, and reducing the impact of noise pollution on the surrounding areas. The upper and lower sides of the interiors of the multiple blade bodies 4 are firmly fixedly connected with reinforcing ribs 6. The reinforcing ribs 6 are made of high-strength materials and are reasonably distributed inside the blade bodies 4. During the operation of the fan, it can greatly enhance the structural strength of the blade bodies 4, enabling them to withstand strong wind loads and effectively prevent the blade bodies from The body 4 is deformed and damaged under high-speed rotation and complex force conditions, which effectively guarantees the stability of the blade body 4, extends the service life of the blade body 4, and reduces the maintenance cost of the fan. The sound-absorbing particles 7 have excellent sound absorption performance, further improve the sound absorption effect, and more effectively suppress the noise generated by the operation of the fan. The gaps 8 between the adjacent multiple sound-absorbing particles 7 form a complex acoustic channel. When the sound wave propagates here, it will be reflected and refracted multiple times in the gaps 8. The sound energy is continuously consumed in this process, thereby greatly enhancing the sound absorption effect, making the fan run quieter and more stable. The multiple blade bodies 4 on the upper side are all rotatably connected to the top plate 9. The top plate 9 plays an important role in auxiliary support and stabilization of the structure of the blade body 4 during the operation of the fan, ensuring the balance and stability of the blade body 4 during the rotation process, reducing the vibration and shaking of the blade body 4, and further improving the operation efficiency and stability of the fan. The adjustment mechanism 2 can accurately adjust the angle of the blade body 4 according to the actual operating conditions of the fan, such as different wind speeds, wind directions and other conditions, so that the blade body 4 is always in the best working state.

[0023] Please refer to the attached Figure 1 , Attachment Figure 3 and attached Figure 5The adjustment mechanism 2 includes a plurality of connecting rods 201, and the plurality of connecting rods 201 are respectively fixedly connected to the tops of the plurality of blade bodies 4, and the tops of the plurality of connecting rods 201 are fixedly connected with hexagonal prisms 202, and the bottoms of the plurality of blade bodies 4 are fixedly connected with connecting sleeves 203, and the plurality of connecting sleeves 203 are respectively engaged with the corresponding hexagonal prisms 202, and the tops of the plurality of hexagonal prisms 202 at the top all penetrate the top plate 9 and are fixedly connected with pinions 204, and an annular groove 205 is provided on the top of the top plate 9, and the inner wall of the annular groove 205 is rotatably connected with an inner gear ring 206, and the plurality of annular grooves 205 are meshedly connected with the inner gear ring 206, and the top of the inner gear ring 206 is rotatably connected with a rotating handle 207, and a locking mechanism 3 is provided on the top of the adjustment mechanism 2.

[0024] Specifically, the connecting rod 201 serves as a connecting link between the blade body 4 and other adjustment components, ensuring the integrity of the structure, so that the movement of the blade body 4 can be accurately transmitted to the subsequent adjustment components, thereby achieving precise adjustment and ensuring the stable operation of the fan. The unique shape design of the hexagonal prism 202 is not only convenient for connection with other components, but also can remain stable when transmitting torque, effectively avoiding the problem of slipping or loose connection during adjustment of the angle of the blade body 4, ensuring the reliable execution of the adjustment action. The connecting sleeve 203 is engaged with the corresponding hexagonal prism 202 to form a stable connection structure between the blade body 4 and the hexagonal prism 202, which can not only transmit power, but also allow the blade body 4 to perform a certain degree of adaptive adjustment when subjected to external force to a certain extent, ensuring that the blade body 4 can maintain a good connection state under various working conditions, improving the reliability and adaptability of the entire adjustment mechanism 2, the pinion 204 can convert the rotation of the blade body 4 into linear motion, and facilitates the angle adjustment through meshing with other gears, making the adjustment process more accurate and efficient, ensuring that the fan can optimize the angle of the blade body 4 according to different working conditions, and improving the efficiency of wind energy utilization. 205 provides a stable track for the rotation of the inner gear ring 206, ensuring that the inner gear ring 206 maintains an accurate position and motion trajectory during the rotation process to avoid deviation or shaking, thereby ensuring accurate meshing with the pinion 204 and achieving a stable angle adjustment function. The inner gear ring 206 can rotate smoothly in the annular groove 205. As an intermediate transmission component, the inner gear ring 206 can mesh with multiple pinions 204 at the same time to achieve synchronous adjustment of the angles of multiple blade bodies 4, ensure the overall coordination and consistency of the fan blades, and improve the stability of the fan operation. The inner gear ring 206 and the rotating handle 2 07 is connected, and rotating handle 207 is convenient for the operator to apply external force. By manually operating the rotating handle 207, the rotation of the inner gear ring 206 can be easily controlled to realize convenient adjustment of the angle of the blade body 4. No complicated electric or hydraulic drive device is required, which reduces the cost and improves the flexibility of adjustment. The locking mechanism 3 can lock the blade body 4 after it is adjusted to a suitable angle to prevent accidental changes in the angle of the blade body 4 during the operation of the fan, ensure that the fan is always kept in the best working state, ensure the stability and safety of the fan operation, and extend the service life of the fan and the blade body 4.

[0025] Please refer to the attached Figure 1 , Attachment Figure 5 and attached Figure 6The locking mechanism 3 includes a fixed frame 301, which is fixedly connected to the right side of the top of the inner gear ring 206. A sliding rod 302 is slidably connected to the inner wall of the fixed frame 301, and a fixed block 303 is fixedly connected to the top of the sliding rod 302. A limiting ring 304 is fixedly connected to the middle part of the outer wall of the sliding rod 302. A spring 305 is arranged on the outer side of the sliding rod 302. The top of the spring 305 is fixedly connected to the top of the inner wall of the fixed frame 301, and the bottom end of the spring 305 is fixedly connected to the limiting ring 304. A plurality of positioning holes 306 are opened on the right side of the top of the inner gear ring 206, and the sliding rod 302 is slidably connected to the middle positioning hole 306.

[0026] Specifically, the sliding rod 302 can slide up and down smoothly in the fixing frame 301, providing the necessary freedom of movement for locking and unlocking operations, so that the sliding rod 302 can accurately cooperate with other components to achieve effective locking and unlocking of the blade angle. The fixing block 303 is convenient for the operator to manually operate the sliding rod 302. When it is necessary to lock or unlock the blade angle, the operator controls the position of the sliding rod 302 by pulling or pressing the fixing block 303. The operation is simple and convenient, which improves the convenience of use of the locking mechanism 3. The limiting ring 304 plays a role in limiting the sliding range of the sliding rod 302, preventing the sliding rod 302 from excessive displacement during the movement, ensuring that the sliding rod 302 works within a predetermined travel range, ensuring the normal operation of the locking mechanism 3, and avoiding locking failure or other malfunctions due to abnormal position of the sliding rod 302. The spring 305 is in the locking mechanism The spring 305 plays a key elastic reset role in the structure 3. When the operator releases the fixing block 303, the spring 305 can rely on its own elastic force to restore the sliding rod 302 to the initial position, realizing the automatic locking function and ensuring that the blade angle can remain stable after adjustment. At the same time, it also provides the operator with a certain operating feel feedback, which is convenient for judging the locking state. The position of the positioning hole 306 corresponds to the different angle adjustment positions of the blade body 4. When the blade body 4 is adjusted to a suitable angle, the sliding rod 302 is inserted into the corresponding positioning hole 306 under the action of the spring 305. Through the cooperation between the sliding rod 302 and the positioning hole 306, the rotation of the inner gear ring 206 is accurately limited, thereby preventing the blade body 4 from accidentally changing its angle, ensuring that the fan always remains in the best working state, improving the stability and safety of the fan operation, and extending the service life of the fan and the blade body 4.

[0027] Please refer to the attached Figure 1 and attached Fig. 9 The upper and lower sides of the outer walls of the multiple mounting plates 1 are fixedly connected with anti-corrosion layers 11, and reserved holes 12 are opened around the top of the outer wall of the multiple anti-corrosion layers 11 and the chassis 10, and the multiple blade bodies 4 are rotatably connected to the corresponding reserved holes 12 respectively.

[0028] Specifically, the anti-corrosion layer 11 can effectively prevent the mounting plate 1 from being corroded by the external environment, thereby extending the service life of the mounting plate 1 . The reserved hole 12 provides a space for the blade body 4 to be installed and rotated, thereby ensuring that the blade body 4 can rotate flexibly therein.

[0029] Please refer to the attached Figure 1 , Attachment Figure 7 and attached Fig. 9 Multiple mounting plates 1 are threadedly connected to the inner wall of the chassis 10 with bolts 13, and nuts 14 are provided on the upper and lower sides of the outer walls of the multiple mounting plates 1 and the chassis 10, and the multiple nuts 14 are threadedly connected to the bolts 13.

[0030] Specifically, the bolt 13 is passed through the mounting plate 1 and the chassis 10, and the mounting plate 1 and the chassis 10 are fixed on the bolt 13 by the nut 14. When maintenance or replacement of parts is required, the nut 14 is conveniently unscrewed and the bolt 13 is removed, thereby achieving separation of the mounting plate 1 and the chassis 10, thereby improving the maintenance convenience of the fan blades.

[0031] Please refer to the attached Figure 1 and attached Figure 7 , an annular locking plate 15 is provided at the top of the top plate 9 and the bottom of the bottom plate 10, and the outer walls of the two annular locking plates 15 are threadedly connected with screws 16 all around, the upper annular locking plate 15 is threadedly connected to the top plate 9 through multiple screws 16 on the upper side, and the lower annular locking plate 15 is threadedly connected to the bottom plate 10 through multiple screws 16 on the lower side, and the outer walls of the two annular locking plates 15 are fixedly connected with wear-resistant rings 17.

[0032] Specifically, the annular locking plate 15 prevents the top plate 9 from deforming during rotation, and the wear-resistant ring 17 can effectively reduce the wear of the annular locking plate 15 during contact or friction with other components, thereby extending the service life of the annular locking plate 15 .

[0033] Please refer to the attached Figure 7 and attached Figure 8 An information plate 18 is provided at the rear side of the bottom of the chassis 10 , and screws 19 are threadedly connected to the outer wall of the information plate 18 . The information plate 18 is threadedly connected to the chassis 10 through the screws 19 .

[0034] Specifically, the information plate 18 can be used to mark important information of the fan blades. The information plate 18 is threadedly connected to the chassis 10 via screws 19 to ensure that the information plate 18 is firmly fixed to the chassis 10 .

[0035] Please refer to the attached Figure 6 and attached Figure 7 A plum blossom slot 20 is provided at the middle of the bottom end of each of the information plates 18 , and a cross slot 21 is provided at the top of each of the screws 16 .

[0036] Specifically, the hexagonal slot 20 makes it convenient to use tools adapted thereto to operate the information plate 18. When the information plate 18 needs to be installed or removed, a special tool such as a screwdriver with a hexagonal head is inserted into the hexagonal slot 20, so that torque can be applied more stably and accurately, thereby easily tightening or loosening the screw 2 19 connected to the chassis 10. When the annular locking plate 15 is threadedly connected to the top plate 9 and the chassis 10, a screwdriver with a cross head is inserted into the cross slot 21, which can accurately transmit torque, so that the screw 16 can be smoothly screwed into the corresponding threaded hole to achieve a firm connection.

[0037] Please refer to the attached Figure 1 , Attachment Figure 5 and attached Figure 6 The outer wall of the rotating handle 207 is fixedly connected with an anti-skid pad 22, and the outer wall of the anti-skid pad 22 is fixedly connected with anti-sliding blocks 23 all around.

[0038] Specifically, the anti-skid pad 22 mainly serves to increase friction. When the operator holds the rotating handle 207 to operate, the anti-skid pad 22 can effectively prevent the hand from slipping, ensuring that the operator can stably hold the rotating handle 207 and apply sufficient force to rotate the inner gear ring 206. The anti-slip block 23 further enhances the anti-skid effect and can form greater friction and resistance between the hand and the rotating handle 207.

[0039] Please refer to the attached Figure 1 , Attachment Figure 5 and attached Figure 6 A filter screen 24 is provided on the inner wall of the top plate 9 , and screws 25 are threadedly connected to the left and right sides of the top of the filter screen 24 , and the filter screen 24 is threadedly connected to the top plate 9 through the screws 25 .

[0040] Specifically, the filter screen 24 can play a filtering role. During the operation of the fan, it can prevent external dust and debris from entering the blade structure. The filter screen 24 is threadedly connected to the top plate 9 through screw three 25, and will not fall off due to airflow impact or vibration when the fan is running.

[0041] Working principle: When the fan is running, the external airflow blows towards the blade body 4. The blade body 4 adopts advanced three-dimensional surface optimization technology. Its curved surface shape has been accurately calculated and designed. When the airflow flows through the blade surface, it can guide the airflow to flow along an ideal trajectory, reducing the separation of the airflow on the blade surface. At the same time, the edge of the blade body 4 is smoothed, further reducing the degree of turbulence of the airflow at the edge, thereby effectively reducing the running resistance. The sound-absorbing layer 5 is used as a sound-absorbing material. When the fan generates noise during operation, whether it is the structural noise generated by the vibration of the blade body 4 or the aerodynamic noise generated by the interaction between the blade body 4 and the airflow, the sound-absorbing layer 5 can effectively absorb the noise, significantly reducing the noise level transmitted to the surrounding environment when the fan is running, creating a quiet and comfortable atmosphere for the surrounding area, and greatly reducing the adverse effects of noise pollution on the surrounding environment and personnel. The reinforcement ribs 6 provide a solid guarantee for the structural strength of the blade. During the continuous operation of the fan, the blade body 4 is subjected to strong The wind load, the reinforcement rib 6 effectively shares and resists these loads through its own high-strength characteristics, prevents the blade body 4 from being deformed or even damaged under high-speed rotation and complex stress conditions, effectively guarantees the structural stability of the blade body 4 during operation, ensures that the fan can operate continuously and stably, extends the service life of the blade body 4, reduces the number of fan shutdown repairs and maintenance costs caused by damage to the blade body 4, and improves the overall economy and reliability of the fan. The sound-absorbing particles 7 on the outer wall of the sound-absorbing layer 5 further enhance the sound absorption effect, and together with the sound-absorbing layer 5, form a multi-layered sound absorption structure. When the sound wave propagates to the sound-absorbing particles 7, part of the sound energy will be directly absorbed by the surface of the sound-absorbing particles 7, while the other part of the sound energy will enter the pores 8 between the sound-absorbing particles 7. The sound wave will be reflected and refracted multiple times in the pores 8, so that the sound energy is continuously consumed in this complex process, which greatly enhances the sound absorption effect, and the noise generated by the operation of the fan is more effectively suppressed, making the fan run quieter and more stable. Subsequently, when the operator manually turns the handle 207, the external force first acts on the turning handle 207 to drive the inner gear ring 206 to rotate in the annular groove 205. The annular groove 205 provides a stable and precise rotation track for the inner gear ring 206, ensuring that the inner gear ring 206 will not deviate or shake during the rotation. When the inner gear ring 206 rotates, the torque is transmitted to each pinion 204 through the meshing connection with the pinion 204, driving the multiple pinions 204 to rotate synchronously. The pinion 204 is fixedly connected to the hexagonal prism 202, and the hexagonal prism 202 forms a stable connection with the blade body 4 through the connecting sleeve 203, so that the rotation of the hexagonal prism 202 can be accurate. The rotation of the pinion 204 will synchronously drive the hexagonal prism 202 to rotate, and then transmit the rotation to the blade body 4 through the connecting sleeve 203, so as to adjust the angle of the blade body 4. The operator can accurately control the rotation direction and angle of the rotating handle 207 according to the actual operating conditions of the fan, so as to achieve fine adjustment of the angle of the blade body 4, ensure that the fan can maintain the best performance under various working conditions, improve the power generation efficiency or ventilation effect of the fan, extend the service life of the fan and the blade body 4, reduce the maintenance cost of the fan, and improve the overall economy and reliability of the fan. Then, the fixing block 303 is manually held to provide a fulcrum for the operator. If the sliding rod 302 is not inserted into the positioning hole 306 in the initial state, the fixing block 303 is pulled upward, and the elastic force of the spring 305 and the friction between the sliding rod 302 and the fixing frame 301 are overcome by the external force applied by the hand, so that the sliding rod 302 slides upward in the fixing frame 301. If the sliding rod 302 is partially inserted into the positioning hole 306 but not completely locked in the initial state, the fixing block 303 is pressed downward to push the sliding rod 302 to move downward. During the sliding upward or downward sliding process of the sliding rod 302 in the fixing frame 301, the spring 305 is compressed or stretched, and the elastic potential energy of the spring 305 is changed. While sliding upward, the sliding rod 302 will disengage from the current positioning hole 306, releasing the restriction on the rotation of the inner gear ring 206, and the operator The personnel continue to fine-tune the angle of the blade body 4 according to the actual situation. After completing the fine-tuning, the operator slowly loosens the fixing block 303. At this time, the spring 305 has stored elastic potential energy due to being compressed before. After losing the external force constraint, the spring 305 returns to its original state by its own elastic force. The spring 305 will push the sliding rod 302 downward. Under the action of the spring 305, the sliding rod 302 is accurately inserted into the positioning hole 306 corresponding to the current angle of the blade body 4. Through the close cooperation between the sliding rod 302 and the positioning hole 306, a mechanical limiting structure is formed, which accurately limits the rotational freedom of the inner gear ring 206, thereby effectively preventing the blade body 4 from changing unexpectedly, thereby completing the locking operation, ensuring that the fan can operate stably in the optimal working state after adjustment, ensuring the reliability and safety of the fan operation, and improving the overall performance of the fan.

[0042] Although 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 fan blade, comprising a plurality of mounting plates (1) and a chassis (10), characterized in that: A plurality of blade bodies (4) are rotatably connected around the top of the plurality of mounting plates (1) and the bottom plate (10); the outer walls of the plurality of blade bodies (4) are fixedly connected with a sound absorbing layer (5); the inner upper and lower sides of the plurality of blade bodies (4) are fixedly connected with reinforcing ribs (6); the outer walls of the plurality of sound absorbing layers (5) are fixedly connected with sound absorbing particles (7); gaps (8) are provided between adjacent plurality of sound absorbing particles (7); a top plate (9) is provided on the top of the plurality of blade bodies (4) on the upper side; the plurality of blade bodies (4) on the upper side are rotatably connected with the top plate (9); and an adjustment mechanism (2) is provided on the top of the mounting plate (1) on the upper side.

2. A fan blade according to claim 1, characterized in that: The adjustment mechanism (2) comprises a plurality of connecting rods (201), the plurality of connecting rods (201) being fixedly connected to the tops of the plurality of blade bodies (4), the tops of the plurality of connecting rods (201) being fixedly connected to a hexagonal prism (202), the bottoms of the plurality of blade bodies (4) being fixedly connected to a connecting sleeve (203), the plurality of connecting sleeves (203) being respectively engaged with the corresponding hexagonal prism (202), the tops of the plurality of hexagonal prisms (202) passing through the top plate (9) and being fixedly connected to a pinion gear (204), the top of the top plate (9) being provided with an annular groove (205), the inner wall of the annular groove (205) being rotatably connected to an inner toothed ring (206), the plurality of annular grooves (205) being meshingly connected to the inner toothed ring (206), the top of the inner toothed ring (206) being rotatably connected to a rotating handle (207), and the top of the adjustment mechanism (2) being provided with a locking mechanism (3).

3. A fan blade according to claim 2, characterized in that: The locking mechanism (3) comprises a fixed frame (301), the fixed frame (301) being fixedly connected to the right side of the top of the inner gear ring (206), a sliding rod (302) being slidably connected to the inner wall of the fixed frame (301), a fixed block (303) being fixedly connected to the top of the sliding rod (302), a limiting ring (304) being fixedly connected to the middle of the outer wall of the sliding rod (302), a spring (305) being arranged on the outer side of the sliding rod (302), the top of the spring (305) being fixedly connected to the top of the inner wall of the fixed frame (301), the bottom of the spring (305) being fixedly connected to the limiting ring (304), a plurality of positioning holes (306) being provided on the right side of the top of the inner gear ring (206), and the sliding rod (302) being slidably connected to the positioning holes (306) in the middle.

4. A fan blade according to claim 1, characterized in that: The upper and lower sides of the outer walls of the plurality of mounting plates (1) are fixedly connected with anti-corrosion layers (11), the plurality of anti-corrosion layers (11) and the outer wall tops of the chassis (10) are provided with reserved holes (12) around them, and the plurality of blade bodies (4) are rotatably connected to the corresponding reserved holes (12) respectively.

5. A fan blade according to claim 1, characterized in that: Bolts (13) are threadedly connected between the plurality of mounting plates (1) and the inner wall of the chassis (10); nuts (14) are provided on upper and lower sides of the outer walls of the plurality of mounting plates (1) and the chassis (10); and the plurality of nuts (14) are threadedly connected to the bolts (13).

6. A fan blade according to claim 1, characterized in that: The top of the top plate (9) and the bottom of the bottom plate (10) are both provided with an annular locking plate (15), and the outer walls of the two annular locking plates (15) are all threadedly connected with screws (16), the upper annular locking plate (15) is threadedly connected to the top plate (9) through multiple screws (16) on the upper side, and the lower annular locking plate (15) is threadedly connected to the bottom plate (10) through multiple screws (16) on the lower side, and the outer walls of the two annular locking plates (15) are fixedly connected with wear-resistant rings (17).

7. A fan blade according to claim 1, characterized in that: An information plate (18) is provided at the rear side of the bottom of the chassis (10), and two screws (19) are threadedly connected to the outer wall of the information plate (18) on all sides, and the information plate (18) is threadedly connected to the chassis (10) via the two screws (19).

8. A fan blade according to claim 7, characterized in that: The middle parts of the bottom ends of the plurality of information plates (18) are each provided with a hexagram groove (20), and the tops of the plurality of screws (16) are each provided with a cross groove (21).

9. A fan blade according to claim 2, characterized in that: The outer wall of the rotating handle (207) is fixedly connected to an anti-skid pad (22), and the outer wall of the anti-skid pad (22) is fixedly connected to anti-slip blocks (23) on all sides.

10. The fan blade according to claim 1, characterized in that: A filter screen (24) is provided on the inner wall of the top plate (9), and three screws (25) are threadedly connected to the left and right sides of the top of the filter screen (24), and the filter screen (24) is threadedly connected to the top plate (9) via the three screws (25).

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