Steady-flow fan

Abstract

The invention relates to the technical field of fans, and provides a steady flow fan which comprises a machine shell and fan blades, the fan blades are fixedly connected with a driving motor used for driving the fan blades to rotate, the machine shell comprises an inner shell and an outer shell, the inner shell is located in the outer shell, the driving motor is fixedly connected with the inner shell, and a plurality of elastic supports are arranged between the inner shell and the outer shell. The elastic support is inclined to the outer shell or the inner shell, the two ends of the elastic support are fixedly connected with the outer shell and the inner shell respectively, a fixing support is arranged on the side, away from the inner shell, of the outer shell, and a multi-section flow guide structure used for reducing turbulent flow and turbulent flow of airflow is arranged between one end of an air outlet of the inner shell and fan blades. By means of the technical scheme, the problems that in the prior art, blades of a fan are likely to be unbalanced in the running process, then vibration is caused, the running noise of equipment is increased through the vibration, mechanical abrasion of the fan is aggravated, and the service life of the fan is shortened are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a steady-flow fan. Background Art

[0002] Axial flow fans are currently widely used ventilation equipment in the fields of industry, construction, HVAC, etc., and are favored for their simple structure, small size, large air volume, and high efficiency. The basic working principle of an axial flow fan is to transfer kinetic energy to the air through rotating blades to achieve ventilation and exhaust by making the air flow in a direction parallel to the axis. According to its specific structure and application scenarios, axial flow fans are often used in large flow and low pressure situations, such as factory ventilation, warehouse ventilation, cooling tower heat dissipation, etc.

[0003] However, traditional axial fans still have many problems in practical applications, especially when running at high speeds, they often face vibration and airflow turbulence. First, since the fan blades are prone to imbalance during operation, the operation of the fan often causes vibration. This vibration not only increases the operating noise of the equipment, but also aggravates the mechanical wear of the fan, shortens its service life, and may cause structural failures, which in turn affects the stability and reliability of the fan.

[0004] Secondly, the blade design of the axial flow fan makes it difficult to completely control the directionality of the airflow. After the airflow passes through the fan blades, the airflow turbulence often occurs at the air outlet. This turbulence not only reduces the overall operating efficiency of the fan, but also causes airflow instability. The existence of turbulence problems interferes with the equipment or air flow environment at the rear end of the fan, affecting the operation of the entire system, especially in places with high requirements for airflow quality and stability, such as clean rooms and precision processing workshops. Summary of the invention

[0005] The present invention provides a steady-flow fan to reduce vibration during the operation of the fan and improve the stability of the airflow.

[0006] The technical solution of the present invention is as follows: A steady flow fan comprises a casing and fan blades, wherein the fan blades are located in the middle of the casing, and the fan blades are fixedly connected to a drive motor for driving the fan blades to rotate. The casing comprises an inner casing and an outer casing, and the inner casing is located inside the outer casing. The drive motor is fixedly connected to the inner casing, and a plurality of elastic brackets are arranged between the inner casing and the outer casing. The elastic brackets are inclined to the outer casing or the inner casing, and the two ends of the elastic brackets are fixedly connected to the outer casing and the inner casing respectively. A multi-stage guide structure for reducing airflow turbulence and turbulence is arranged between one end of the inner casing air outlet and the fan blades.

[0007] Furthermore, a plurality of screws are fixedly connected to the inner shell on one side facing the outer shell, and an inner arc fixing plate and an outer arc fixing plate that fit the inner shell and the outer shell are distributed at both ends of the elastic bracket, and the inner arc fixing plate and the outer arc fixing plate are both provided with nuts, and the inner arc fixing plate is connected to the inner shell through a threaded connection of nuts and screws, and the outer arc fixing plate is also provided with bolts, and the outer arc fixing plate is connected to the outer shell through a threaded connection of bolts and nuts.

[0008] Furthermore, the multi-section flow guide structure includes a first rectifying structure, a second rectifying structure, and a third rectifying structure which are arranged in sequence from the fan blades to the air outlet of the inner shell. The first rectifying structure, the second rectifying structure, and the third rectifying structure are fixedly connected to the outer shell through the inner shell. An isolation interval is provided between the first rectifying structure, the second rectifying structure, the third rectifying structure and the inner shell. The first rectifying structure includes a first central fixed block and three first rectifying blades fixed on the first central fixed block. The second rectifying structure includes a second central fixed block and three second rectifying blades fixed on the second central fixed block. The third rectifying structure includes a third central fixed block and three third rectifying blades fixed on the third central fixed block. The length of the second rectifying blade is longer than that of the first rectifying blade. The length of the third rectifying blade is longer than that of the second rectifying blade. The first rectifying blade, the second rectifying blade, and the third rectifying blade are inclined toward the fan blade.

[0009] Furthermore, the first straightening blade includes a leading edge facing the fan blade and a trailing edge away from the fan blade, the leading edge is an arc-shaped curved surface structure, the thickness of the first straightening blade gradually becomes thinner from the leading edge to the trailing edge, the trailing edge is a wedge-shaped structure, the upper surface of the first straightening blade is a raised streamlined structure, the lower surface of the first straightening blade is a planar structure, and the structures of the second straightening blade and the third straightening blade are the same as that of the first straightening blade.

[0010] Furthermore, the outer shell is fixedly connected to a plurality of servo motors, and the first straightening blade, the second straightening blade, and the third straightening blade are provided with adjustment rods toward one end of the outer shell, the adjustment rods extend toward the outer shell and are connected to the servo motor, the first straightening blade is rotatably connected to the first center fixed block, the second straightening blade is rotatably connected to the second center fixed block, and the third straightening blade is rotatably connected to the third center fixed block, an airflow monitoring device is provided inside the inner shell, and the servo motor is electrically connected to the airflow monitoring device.

[0011] Furthermore, the airflow monitoring device includes three thermal film wind speed sensors and a controller, the three thermal film wind speed sensors are respectively located on the side of the first straightening blade, the second straightening blade, and the third straightening blade away from the fan blade, the three thermal film sensors are respectively fixedly connected to the first center fixing block, the second center fixing block, and the third center fixing block, the three thermal film sensors face the inner shell, and the thermal film wind speed sensor and the servo motor are electrically connected to the controller.

[0012] Furthermore, the airflow monitoring device also includes three miniature pressure sensors, which are respectively located on the side of the first straightening blade, the second straightening blade, and the third straightening blade away from the fan blade. The three miniature pressure sensors are respectively fixedly connected to the first center fixing block, the second center fixing block, and the third center fixing block. The three miniature pressure sensors face the inner shell, and the miniature pressure sensors are electrically connected to the controller. The angle between the three miniature pressure sensors is 120 degrees, and the angle between the three thermal film wind speed sensors is 120 degrees.

[0013] Furthermore, fixing feet for fixing the shell are provided on both sides of the shell, the fixing feet are fixedly connected to the shell by bolts, and a buffer pad is provided on the side of the fixing feet away from the shell.

[0014] The working principle and beneficial effects of the present invention are: The double-layer shell design of the present invention prevents the vibration of the motor and fan blades during operation from being directly transmitted to the external casing and equipment mounting structure through the isolation effect of the elastic bracket. This design can absorb and buffer the vibration of the blades when they rotate at high speed, solving the problem of equipment vibration caused by imbalance in the existing fan system. The mechanical noise and wind noise of the entire system are effectively controlled by absorbing vibrations through the elastic bracket and reducing airflow turbulence through the guide structure. At the same time, reducing vibrations and airflow disturbances can also reduce mechanical wear, thereby extending the service life of the fan. The multi-stage guide structure significantly reduces the problem of airflow turbulence near the fan blades, allowing the airflow to pass through the fan blades more smoothly and orderly, improving the overall operating efficiency of the fan and reducing the impact of airflow turbulence on the back-end equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 It is a rear view of the present invention; Figure 4 for Figure 2 Sectional view at AA.

[0017] In the figure: 1. shell; 2. elastic bracket; 3. first straightening blade; 4. second straightening blade; 5. third straightening blade; 6. thermal film wind speed sensor; 7. micro pressure sensor; 8. fixing foot; 11. inner shell; 12. outer shell; 13. fan blade; 14. drive motor; 21. screw; 22. nut; 31. first center fixing block; 41. second center fixing block; 51. third center fixing block; 81. buffer pad; 91. servo motor; 92. controller; 110. isolation interval; 345. adjustment rod. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments 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.

[0019] like Figure 1~Figure 4 As shown, the present embodiment proposes a steady flow fan, comprising a casing and a fan blade 13. The fan blade 13 is located in the middle of the casing. The fan blade 13 is fixedly connected to a drive motor 14 for driving the fan blade 13 to rotate. The casing comprises an inner casing 11 and an outer casing 12. The inner casing 11 is located inside the outer casing 12. The drive motor 14 is fixedly connected to the inner casing 11. A plurality of elastic brackets 2 are arranged between the inner casing 11 and the outer casing 12. The elastic bracket 2 is inclined to the outer casing 12 or the inner casing 11. Both ends of the elastic bracket 2 are fixedly connected to the outer casing 12 and the inner casing 11 respectively. A multi-stage guide structure for reducing airflow turbulence and turbulence is arranged between one end of the air outlet of the inner casing 11 and the fan blade 13.

[0020] The outer shell 12 and the inner shell 11 together constitute the overall structure of the fan, providing strength and stability. The inner shell 11 is the mounting structure for the fan blades 13 and the drive motor 14, while the outer shell 12 protects the equipment and provides external support for the fan. The separation design of the inner and outer shells 12 reduces the directly transmitted mechanical vibration. The double-layer shell 1 design effectively reduces the transmission of vibration and noise by isolating the inner and outer shells 12, making the fan run more smoothly. The outer shell 12 can withstand external stress from the environment, while the inner shell 11 focuses on supporting and stabilizing the rotation of the fan blades 13 and reducing the imbalance of the blades. The drive motor 14 is directly fixed to the inner shell 11, responsible for driving the rotation of the fan blades 13 and ensuring the stability of the rotation axis. The stable drive connection reduces the direct transmission of motor vibration to the external structure, further reducing the noise and wear problems caused by mechanical vibration. The elastic bracket 2 is arranged obliquely between the inner shell 11 and the outer shell 12, used to support and isolate the two layers of the shell 1, and absorb the vibration energy generated during the operation of the fan. By reducing the direct rigid connection between the inner and outer shells 12, the elastic bracket 2 can significantly reduce mechanical wear. The design of the elastic bracket 2 can effectively absorb and disperse the vibration caused by the imbalance or resonance of the fan blades 13. The inclined installation method further optimizes the support strength and elastic effect, reduces the vibration transmission when the fan is running, thereby reducing the operating noise and extending the service life of the equipment.

[0021] In this embodiment, a plurality of screws 21 are fixedly connected to the side of the inner shell 11 facing the outer shell 12, and an inner arc fixing plate and an outer arc fixing plate that fit the inner shell 11 and the outer shell 12 are respectively provided at both ends of the elastic bracket 2. Nuts 22 are provided on the inner arc fixing plate and the outer arc fixing plate. The inner arc fixing plate is connected to the inner shell 11 through a threaded connection between the nut 22 and the screw 21. Bolts are also provided on the outer arc fixing plate, and the outer arc fixing plate is connected to the outer shell 12 through a threaded connection between the bolts and the nut 22.

[0022] The screw 21 is fixedly connected to the side of the inner shell 11 facing the outer shell 12, and serves as the main structural member connecting the inner shell 11 and the elastic bracket 2. It is connected to the nut 22 on the inner arc fixing plate through a thread to ensure the tight connection between the inner shell 11 and the elastic bracket 2. The screw 21 provides a stable and adjustable connection method to ensure the firm installation of the elastic bracket 2 on the inner shell 11. At the same time, through the threaded connection, the screw 21 can be easily disassembled and adjusted, which is convenient for the maintenance and installation of the equipment. And by directly fixing the screw 21 on the side of the inner shell 11 facing the outer shell 12, it can be avoided that the inner surface of the inner shell 11 is left with a bulge due to the fixing method of the detachable bolt, thereby affecting the movement of the airflow. The inner arc fixing plate cooperates with the inner shell 11 and is fixed to the inner shell 11 through the nut 22 on the screw 21. The arc design of the fixing plate ensures that it fits the inner shell 11 tightly, provides a larger contact area, and increases the stability of the connection. The inner arc fixing plate provides a stronger supporting force through the arc design, which enhances the connection stability between the elastic bracket 2 and the inner shell 11. This not only prevents the displacement of the bracket, but also further reduces the transmission of vibration and improves the overall stability of the fan. Through the threaded connection of the nut 22 and the screw 21, the inner arc-shaped fixing plate can be easily adjusted and disassembled, which improves the convenience of equipment maintenance. The outer arc-shaped fixing plate cooperates with the outer shell 12, and the outer shell 12 is fixed together with the elastic bracket 2 through the threaded connection of the bolt and nut 22, which plays the role of supporting the outer shell 12 and preventing the shell 1 from being displaced or deformed. The outer arc-shaped fixing plate also adopts an arc-shaped design to ensure that it fits tightly with the outer shell 12, providing a larger contact area, making the outer shell 12 more stable during high-speed operation.

[0023] In this embodiment, the multi-stage guide structure includes a first rectifying structure, a second rectifying structure, and a third rectifying structure which are arranged in sequence from the fan blades 13 to the air outlet of the inner shell 11. The first rectifying structure, the second rectifying structure, and the third rectifying structure are fixedly connected to the outer shell 12 through the inner shell 11. An isolation interval 110 is arranged between the first rectifying structure, the second rectifying structure, the third rectifying structure and the inner shell 11. The first rectifying structure includes a first central fixing block 31 and three first rectifying blades 3 fixed on the first central fixing block 31. The second rectifying structure includes a second central fixing block 41 and three second rectifying blades 4 fixed on the second central fixing block 41. The third rectifying structure includes a third central fixing block 51 and three third rectifying blades 5 fixed on the third central fixing block 51. The length of the second rectifying blade 4 is longer than that of the first rectifying blade 3. The length of the third rectifying blade 5 is longer than that of the second rectifying blade 4. The first rectifying blade 3, the second rectifying blade 4, and the third rectifying blade 5 are inclined toward the fan blade 13.

[0024] The first rectifying structure, the second rectifying structure, and the third rectifying structure are arranged in sequence from the fan blades 13 to the air outlet of the inner shell 11, and are used to gradually guide and rectify the airflow. Each rectifying structure is responsible for adjusting the airflow at different positions to ensure that the airflow enters the next guide area smoothly and orderly after passing through the fan blades 13. The rectifying structure passes through the inner shell 11 and is fixedly connected to the outer shell 12, so that its structure is stable and the transmission of mechanical vibration inside and outside is isolated. The segmented rectification design effectively reduces the turbulence of the airflow in the fan by controlling the airflow section by section. The rectifying blades extended section by section enable the airflow to transition more smoothly and avoid violent disturbances in the airflow in different guide intervals. Each rectifying structure is fixed between the inner and outer shells 12 to form a stable guide system, reduce the impact of vibration on airflow control, make the rectification effect more reliable, and improve the overall stability of the airflow. The isolation interval 110 is located between the rectifying structure and the inner shell 11 to ensure that the rectifying structure maintains a certain distance from the shell 1 during the operation of the fan to reduce the direct transmission of vibration and prevent the guiding effect of the rectifying blades from being disturbed. Each rectifying structure has a central fixing block for fixing three rectifying blades. These fixing blocks are located at the core of the rectifying structure, ensuring the stable arrangement of the rectifying blades and providing sufficient structural strength so that the blades maintain a stable shape under the action of the airflow. The design of the central fixing block enables the three rectifying blades to maintain the best inclination angle and arrangement, ensuring that the airflow can effectively pass through the blade surface without unnecessary disturbance. The existence of the fixing block also enables the rectifying blades to maintain uniform force during operation, avoiding deformation or displacement of the blades. Each rectifying structure contains three rectifying blades, and the airflow is gradually adjusted and stabilized by the different lengths and segmented extension design of the rectifying blades to reduce turbulence. The rectifying blades are designed to be inclined toward the fan blades 13, aiming to optimize the airflow guidance so that the airflow can flow better along the surface of the rectifying blades. The distribution of the three blades can effectively disperse the disturbance area of ​​the airflow, so that each blade can play a rectifying role in different airflow areas. The segmented extension of the blade design enables each section of the guide structure to play a rectifying role in a specific airflow area, thereby smoothly controlling the airflow. The inclined design of the rectifying blades cooperates with the fan blades 13, which can reduce the turbulence of the airflow after leaving the fan blades 13, reduce the eddy current phenomenon caused by the rotating wind, make the airflow smoother, and thus improve the overall operating efficiency of the fan.

[0025] In this embodiment, the first straightening blade 3 includes a leading edge facing the fan blade 13 and a trailing edge away from the fan blade 13, the leading edge is a circular arc curved surface structure, the thickness of the first straightening blade 3 gradually becomes thinner from the leading edge to the trailing edge, the trailing edge is a wedge-shaped structure, the upper surface of the first straightening blade 3 is a convex streamlined structure, the lower surface of the first straightening blade 3 is a planar structure, and the structures of the second straightening blade 4 and the third straightening blade 5 are the same as that of the first straightening blade 3.

[0026] The leading edge of the first straightening blade 3 faces the fan blade 13 and is designed as an arc-shaped curved surface structure. This shape can effectively reduce the air resistance of the airflow in front of the straightening blade and allow the airflow to smoothly enter the surface of the straightening blade. The arc-shaped leading edge is similar to the design of an aircraft wing, which can reduce the separation and turbulence of the airflow and ensure that the airflow flows smoothly along the surface of the blade. This can reduce the resistance of the leading edge, reduce the vortex generated by the airflow at the front end of the blade, and improve the stability of the airflow. The thickness of the first straightening blade 3 gradually becomes thinner from the leading edge to the trailing edge, forming a streamlined shape. This design is to optimize the flow of airflow on the surface of the blade, so that the airflow gradually accelerates without being disturbed by sudden shape changes. The trailing edge of the first straightening blade 3 is designed as a wedge-shaped structure. This sharp and thin design can allow the airflow to disperse quickly at the end of the blade and reduce the separation of the airflow at the trailing edge of the blade. The wedge-shaped trailing edge design can effectively reduce the drag resistance of the airflow at the tail of the blade. The airflow can flow out smoothly from the surface of the blade without generating vortices or airflow separation at the rear end of the blade, further reducing the energy loss of the fan and improving the overall efficiency of the fan. The upper surface of the first straightening blade 3 is designed as a raised streamlined structure, which can accelerate the flow of air on the upper surface of the blade to form a smooth airflow path. The raised streamlined structure can reduce the airflow resistance and form a low-pressure area, so that the airflow can flow faster along the blade surface, thereby avoiding the separation of airflow and the generation of vortices. This helps to enhance the airflow guidance behind the fan blade 13, so that the airflow flows more smoothly and smoothly to the air outlet, and improves the operating efficiency of the fan. The lower surface of the first straightening blade 3 is a planar structure, which forms a clear contrast with the streamlined structure of the upper surface. This design accelerates the airflow on the upper surface, while the lower surface maintains a relatively stable flow. The planar lower surface design helps to form a pressure difference between the upper and lower surfaces of the blade, enhance the straightening effect, make the airflow flow faster above the blade, and reduce the formation of turbulence. The design draws on the aerodynamic principles of aircraft wings to ensure that the distribution of airflow above and below the straightening blade is more uniform and stable. The second straightening blade 4 and the third straightening blade 5 are consistent in structure with the first straightening blade 3, which means that the three straightening blades all adopt the same aerodynamic design and can effectively control and stabilize the airflow at different positions of the fan.

[0027] In this embodiment, the outer shell 12 is fixedly connected to a plurality of servo motors 91, and an adjustment rod 345 is provided toward one end of the outer shell 12 for the first straightening blade 3, the second straightening blade 4, and the third straightening blade 5. The adjustment rod 345 extends toward the outer shell 12 and is connected to the servo motor 91. The first straightening blade 3 is rotatably connected to the first center fixed block 31, the second straightening blade 4 is rotatably connected to the second center fixed block 41, and the third straightening blade 5 is rotatably connected to the third center fixed block 51. An airflow monitoring device is provided inside the inner shell 11, and the servo motor 91 is electrically connected to the airflow monitoring device.

[0028] The servo motor 91 is used to drive the angle adjustment of each rectifying blade. Through the precise control of the servo motor 91, the angle of the rectifying blade can be flexibly adjusted according to the change of the airflow, so as to realize the dynamic adjustment of the airflow. The adjustment rod 345 connects the rectifying blade and the servo motor 91, and acts as a transmission device, so that the servo motor 91 can change the angle of the rectifying blade through the adjustment rod 345. The design of the adjustment rod 345 ensures that the servo motor 91 can quickly and accurately control the blade. The rectifying blade and the central fixed block are connected in a rotating manner, so that the blade can be adjusted in angle under the drive of the servo motor 91. The rotating connection ensures that the blade can accurately adjust its angle during the operation of the fan and change the airflow direction. The airflow monitoring device is used to monitor the airflow state inside the fan in real time, collect data and feed it back to the servo motor 91 control system. The airflow monitoring device can detect key parameters such as the speed, pressure, and stability of the airflow.

[0029] In this embodiment, the airflow monitoring device includes three hot film wind speed sensors 6 and a controller 92. The three hot film wind speed sensors 6 are respectively located on the side of the first straightening blade 3, the second straightening blade 4, and the third straightening blade 5 away from the fan blade 13. The three hot film sensors are respectively fixedly connected to the first central fixing block 31, the second central fixing block 41, and the third central fixing block 51. The three hot film sensors face the inner shell 11. The hot film wind speed sensor 6 and the servo motor 91 are electrically connected to the controller 92. The airflow monitoring device also includes three micro pressure sensors 7. The three micro pressure sensors 7 are respectively located on the side of the first straightening blade 3, the second straightening blade 4, and the third straightening blade 5 away from the fan blade 13. The three micro pressure sensors 7 are respectively fixedly connected to the first central fixing block 31, the second central fixing block 41, and the third central fixing block 51. The three micro pressure sensors 7 face the inner shell 11. The micro pressure sensors 7 are electrically connected to the controller 92. The angle between the three micro pressure sensors 7 is 120 degrees, and the angle between the three hot film wind speed sensors 6 is 120 degrees.

[0030] The hot film wind speed sensor 6 is used to monitor the air flow velocity around the rectifying blades, and evaluate the air flow state during the operation of the fan by detecting the flow velocity changes of the air flow in real time. The hot film wind speed sensor 6 is installed behind the rectifying blade to ensure independent monitoring of each section of the air flow. The 120-degree uniform distribution of the hot film wind speed sensor 6 can provide comprehensive and accurate air flow detection, and improve the stability and efficiency of the fan. The micro pressure sensor 7 is used to monitor the pressure changes in the air flow and capture the pressure distribution around the rectifying blades. The micro pressure sensor 7 is installed behind the rectifying blade to ensure accurate monitoring of the air flow pressure in different sections. The 120-degree uniform distribution of the micro pressure sensor 7 ensures all-round perception of the air flow pressure, making the pressure distribution of the air flow more uniform, which helps to improve the balance and stability of the system. The controller 92 (PLC) obtains data from multiple hot film wind speed sensors 6 and micro pressure sensors 7 in real time, including air flow velocity and pressure information. Through these data, the controller 92 can analyze the changes in the air flow inside the fan in real time. The controller 92 automatically adjusts the working state of the servo motor 91 connected to the rectifier blades through calculation and analysis according to the real-time airflow information fed back by the sensor, and accurately controls the angle of the rectifier blades to cope with the fluctuation of the airflow. The controller 92 preferably adopts the Omron CP1E series PLC, which is an entry-level PLC with good cost performance and is suitable for small-scale automatic control of the fan system. It can realize the data collection of the hot film wind speed sensor 6 and the micro pressure sensor 7 and the control function of the servo motor 91.

[0031] In this embodiment, fixed feet 8 for fixing the outer shell 12 are provided on both sides of the outer shell 12, and the fixed feet 8 are fixedly connected to the outer shell 12 by bolts, and a buffer pad 81 is provided on the side of the fixed feet 8 away from the outer shell 12. The fixed feet 8 are connected to the outer shell 12 by bolts to ensure that the entire fan device can be firmly fixed at the installation position during operation to prevent the fan from being displaced or tilted due to vibration or external factors. The fixed feet 8 support the weight of the entire fan device and help transfer the vibration generated by the fan during operation to the ground or the installation platform, thereby reducing the impact of the fan vibration on the equipment and the surrounding environment. The buffer pad 81 is located on the side of the fixed foot 8 away from the outer shell 12, and absorbs vibration energy to reduce the vibration generated by the fan during operation from being transmitted to the fixed foot 8 and the ground. The buffer pad 81 provides a flexible buffer between the device and the ground or the installation platform when the fan is running to prevent wear caused by long-term contact.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steady flow fan, comprising a casing and a fan blade (13), wherein the fan blade (13) is located in the middle of the casing, and the fan blade (13) is fixedly connected to a drive motor (14) for driving the fan blade (13) to rotate, characterized in that: The casing comprises an inner casing (11) and an outer casing (12), the inner casing (11) being located inside the outer casing (12), the drive motor (14) being fixedly connected to the inner casing (11), a plurality of elastic brackets (2) being arranged between the inner casing (11) and the outer casing (12), the elastic brackets (2) being inclined toward the outer casing (12) or the inner casing (11), the two ends of the elastic brackets (2) being fixedly connected to the outer casing (12) and the inner casing (11) respectively, and a multi-stage flow guiding structure for reducing airflow turbulence and turbulence is arranged between one end of the air outlet of the inner casing (11) and the fan blades (13).

2. The steady flow fan according to claim 1, characterized in that: A plurality of screw rods (21) are fixedly connected to one side of the inner shell (11) facing the outer shell (12); an inner arc-shaped fixing plate and an outer arc-shaped fixing plate are disposed at both ends of the elastic bracket (2) and fit the inner shell (11) and the outer shell (12); the inner arc-shaped fixing plate and the outer arc-shaped fixing plate are both provided with nuts (22); the inner arc-shaped fixing plate is connected to the inner shell (11) by threaded connection between the nuts (22) and the screw rods (21); the outer arc-shaped fixing plate is further provided with bolts; the outer arc-shaped fixing plate is connected to the outer shell (12) by threaded connection between the bolts and the nuts (22).

3. The steady flow fan according to claim 1, characterized in that: The multi-stage flow-guiding structure comprises a first rectifying structure, a second rectifying structure, and a third rectifying structure which are arranged in sequence from the fan blades (13) to the air outlet of the inner shell (11); the first rectifying structure, the second rectifying structure, and the third rectifying structure are fixedly connected to the outer shell (12) through the inner shell (11); an isolation spacer (110) is provided between the first rectifying structure, the second rectifying structure, the third rectifying structure and the inner shell (11); the first rectifying structure comprises a first central fixing block (31) and three first rectifying blades (3) fixed to the first central fixing block (31); The second rectifying structure comprises a second central fixing block (41) and three second rectifying blades (4) fixed on the second central fixing block (41); the third rectifying structure comprises a third central fixing block (51) and three third rectifying blades (5) fixed on the third central fixing block (51); the second rectifying blade (4) is longer than the first rectifying blade (3); the third rectifying blade (5) is longer than the second rectifying blade (4); and the first rectifying blade (3), the second rectifying blade (4) and the third rectifying blade (5) are inclined toward the fan blade (13).

4. The steady flow fan according to claim 3, characterized in that: The first straightening blade (3) comprises a leading edge facing the fan blade (13) and a trailing edge facing away from the fan blade (13); the leading edge is an arc-shaped curved surface structure; the thickness of the first straightening blade (3) gradually becomes thinner from the leading edge to the trailing edge; the trailing edge is a wedge-shaped structure; the upper surface of the first straightening blade (3) is a convex streamlined structure; the lower surface of the first straightening blade (3) is a planar structure; the structures of the second straightening blade (4) and the third straightening blade (5) are the same as the structure of the first straightening blade (3).

5. The steady flow fan according to claim 3, characterized in that: The outer shell (12) is fixedly connected to a plurality of servo motors (91); an adjustment rod (345) is provided at one end of the first rectifying blade (3), the second rectifying blade (4), and the third rectifying blade (5) facing the outer shell (12); the adjustment rod (345) extends toward the outer shell (12) and is connected to the servo motor (91); the first rectifying blade (3) is rotatably connected to a first central fixing block (31); the second rectifying blade (4) is rotatably connected to a second central fixing block (41); the third rectifying blade (5) is rotatably connected to a third central fixing block (51); an airflow monitoring device is provided inside the inner shell (11); and the servo motor (91) is electrically connected to the airflow monitoring device.

6. The steady flow fan according to claim 5, characterized in that: The airflow monitoring device comprises three hot film wind speed sensors (6) and a controller (92). The three hot film wind speed sensors (6) are respectively located on the side of the first straightening blade (3), the second straightening blade (4), and the third straightening blade (5) away from the fan blade (13). The three hot film sensors are respectively fixedly connected to the first central fixing block (31), the second central fixing block (41), and the third central fixing block (51). The three hot film sensors face the inner shell (11). The hot film wind speed sensors (6) and the servo motor (91) are electrically connected to the controller (92).

7. The steady flow fan according to claim 6, characterized in that: The airflow monitoring device further comprises three micro pressure sensors (7), the three micro pressure sensors (7) being respectively located on the side of the first rectifying blade (3), the second rectifying blade (4) and the third rectifying blade (5) away from the fan blade (13), the three micro pressure sensors (7) being respectively fixedly connected to the first central fixing block (31), the second central fixing block (41) and the third central fixing block (51), the three micro pressure sensors (7) facing the inner shell (11), the micro pressure sensors (7) being electrically connected to the controller (92), the angle between the three micro pressure sensors (7) being 120 degrees, and the angle between the three hot film wind speed sensors (6) being 120 degrees.

8. The steady flow fan according to claim 1, characterized in that: Both sides of the shell (12) are provided with fixing feet (8) for fixing the shell (12); the fixing feet (8) are fixedly connected to the shell (12) by bolts; and a buffer pad (81) is provided on the side of the fixing feet (8) facing away from the shell (12).

Images