Fan capable of being automatically adjusted according to air volume
Through the combined structure of connecting rod, adjustment frame, adjustment rod and spring in the fan, the blade angle is automatically adjusted when the wind is strong, solving the complex and cost problems of traditional fan systems, ensuring the stable operation of the fan.
Patent Information
- Application Number
- CN202510573055.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-06-06
AI Technical Summary
Existing fans need to adjust the blade angle when the wind is strong to avoid the risks of overload and blade separation, but traditional pitch control systems are complex and costly, and independent blade control can easily lead to instability.
A fan is designed, using a combined structure of connecting rod, adjustment frame, adjustment rod and spring, and the spring is used to rotate the spring around the connecting rod by the air blades, the spring pulls the adjustment frame, and the adjustment frame twists and pulls the adjustment rod to achieve synchronous angle adjustment of all blades and automatically adjust the windward area of the blades.
It realizes automatic adjustment of the blade angle without a motor, ensuring the coordinated adjustment of multiple blades, and avoiding the risk of fan instability caused by inconsistent blade angles.
Smart Images
Figure CN120100624A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a fan, in particular to a fan which can be automatically adjusted according to the air volume. Background Art
[0002] When the wind volume is high, the wind turbine may have the risk of generator overload or blade separation. Therefore, when the wind is strong, the blade angle needs to be adjusted appropriately to reduce the windward area of the blade. Generally, this blade adjustment requires a variable pitch control system. The common variable pitch system requires a drive motor to be provided for each blade. The motor drives the blade to rotate to change the windward area of the blade. This mechanism is complex and costly. Since each blade is controlled separately, if the adjustment angles between the blades are inconsistent, the wind turbine will become unstable and there will be risks. Therefore, it is necessary to improve it. Summary of the invention
[0003] The purpose of the present invention is to provide a fan which can be automatically adjusted according to the wind volume, the angle of the blades can be adjusted without a motor, and multiple blades can be linked together without inconsistent adjustment angles between blades.
[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a fan that automatically adjusts according to the wind volume, comprises a rotating shaft, a fan blade and a bracket, the fan blade is connected to the rotating shaft through a connecting rod, one end of the connecting rod is rotatably connected to the fan blade, and the other end of the connecting rod is combined and connected to the rotating shaft, the rotating shaft is rotatably connected to the bracket, and also comprises an adjustment frame, an adjustment rod and a spring, the rotating frame is sleeved on the rotating shaft, one end of the adjusting rod is rotatably connected to the adjusting frame, the other end of the adjusting rod is rotatably connected to the fan blade, one end of the spring is connected to the fan blade, and the other end of the spring is connected to the adjusting frame, when the adjusting frame rotates relative to one side of the rotating shaft, the fan blade expands outward, when the adjusting frame rotates relative to the other side of the rotating shaft, the fan blade retracts inward, and the spring pulls the fan blade to the retracted side. When in use, the wind blows towards the fan blades, and the fan blades will rotate around the hinge point of the connecting rod (the direction of rotation is toward the side that reduces the windward area). During the rotation, the fan blades pull the spring, and the tension of the spring makes the angle of the fan blade within a reasonable range. When the fan blades pull the spring, the spring will also pull the adjustment frame, and the adjustment frame will twist. During the twisting process, the adjustment rod will pull the fan blades, so that all the fan blades can also achieve synchronous angle adjustment. This structure can adjust the angle of the blades without a motor, and multiple blades can be linked, so there will be no inconsistent adjustment angles between blades.
[0005] As a preferred embodiment of the present invention, there are four fan blades, the four fan blades are arranged longitudinally, and the outer sides of the fan blades are curved surfaces.
[0006] As a preferred embodiment of the present invention, the adjustment frame is cross-shaped, and each arm of the adjustment frame is rotatably connected to an adjustment rod.
[0007] As a preferred embodiment of the present invention, the four adjustment rods have the same length, the connection positions of the four adjustment rods on the adjustment frame are located on the same circumference, and the connection positions of the four adjustment rods on the fan blades are located on the same circumference.
[0008] As a preferred embodiment of the present invention, there are two springs, and the two springs are respectively connected to two opposite fan blades.
[0009] As a preferred embodiment of the present invention, the connecting rod is divided into two layers, the connecting rod located in the upper layer is connected to the top of the fan blade, and the connecting rod located in the lower layer is connected to the bottom of the fan blade.
[0010] As a preferred embodiment of the present invention, the bracket includes four supporting legs and two platforms, the four supporting legs are gradually opened from top to bottom, one of the platforms is located at the top of the supporting legs, and the other platform is located in the middle of the supporting legs, and the rotating shaft is rotatably connected to the two platforms through bearings.
[0011] As a preferred embodiment of the present invention, the other end of the connecting rod is welded to a sleeve, the sleeve is sleeved on the rotating shaft, and the screw passes through the sleeve and is connected to the rotating shaft.
[0012] As a preferred embodiment of the present invention, a reinforcing rod is welded to the connecting rod located at the bottom, and the other end of the reinforcing rod is welded to the sleeve.
[0013] As a preferred embodiment of the present invention, the fan blade includes an arc-shaped plate and three reinforcing ribs, and the reinforcing ribs are respectively arranged at the top, middle and bottom of the arc-shaped plate.
[0014] Compared with the prior art, the present invention has the following beneficial effects: When in use, the wind blows towards the fan blades, and the fan blades will rotate around the hinge point of the connecting rod (the direction of rotation is toward the side that reduces the windward area). During the rotation, the fan blades pull the spring, and the tension of the spring makes the angle of the fan blade within a reasonable range. When the fan blades pull the spring, the spring will also pull the adjustment frame, and the adjustment frame will twist. During the twisting process, the adjustment rod will pull the fan blades, so that all the fan blades can also achieve synchronous angle adjustment. This structure can adjust the angle of the blades without a motor, and multiple blades can be linked, so there will be no inconsistent adjustment angles between blades. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional schematic diagram of the present invention.
[0016] Figure 2 It is a side view of the present invention.
[0017] Figure 3 for Figure 2 Section view along AA.
[0018] Figure 4 yes Figure 2 A partial enlarged schematic diagram of .
[0019] Figure 5 It is a schematic diagram of a fan blade. DETAILED DESCRIPTION
[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0022] See also Figure 1-3 The present invention provides a technical solution: a fan that automatically adjusts according to the wind volume, comprising a rotating shaft 1, a fan blade 2 and a bracket 3, wherein the fan blade 2 is connected to the rotating shaft 1 through a connecting rod 4, one end of the connecting rod 4 is rotatably connected to the fan blade 2, and the other end of the connecting rod 4 is combined together and connected to the rotating shaft 1, and the rotating shaft 1 is rotatably connected to the bracket 3.
[0023] It also includes an adjustment frame 6, an adjustment rod 61 and a spring 62. The rotating frame 6 is sleeved on the rotating shaft 1. One end of the adjustment rod 61 is rotatably connected to the adjustment frame 6. The other end of the adjustment rod 61 is rotatably connected to the fan blade 2. One end of the spring 62 is connected to the fan blade 2. The other end of the spring 62 is connected to the adjustment frame 6. When the adjustment frame 6 rotates relative to one side of the rotating shaft 1, the fan blade 2 is expanded outward. When the adjustment frame 6 rotates relative to the other side of the rotating shaft 1, the fan blade 2 is retracted inward. The spring pulls the fan blade to open one side inward. When in use, the wind blows toward the fan blade, and the fan blade will rotate around the hinge point of the connecting rod (the direction of rotation is toward the side that reduces the windward area). During the rotation, the fan blade pulls the spring, and the tension of the spring makes the angle of the fan blade within a reasonable range. In the process of the fan blade pulling the spring, the spring will also pull the adjustment frame, and the adjustment frame will be twisted. During the twisting process, the adjustment rod will pull the fan blade, so that all the fan blades can also achieve synchronous angle adjustment. This structure can adjust the angle of the blades without a motor, and multiple blades can be linked together, so there will be no inconsistent adjustment angles between blades.
[0024] There are four fan blades 2 , which are arranged longitudinally, and the outer sides of the fan blades 2 are curved surfaces.
[0025] The adjustment frame 6 is cross-shaped, and each arm of the adjustment frame 6 is rotatably connected to an adjustment rod 61 .
[0026] The lengths of the four adjustment rods 61 are the same, the connection positions of the four adjustment rods 61 on the adjustment frame 6 are located on the same circumference, and the connection positions of the four adjustment rods 61 on the fan blades 2 are located on the same circumference. This design can ensure that when the adjustment frame rotates, the angles of each blade following the rotation are consistent, thereby ensuring the stability of the fan operation.
[0027] There are two springs 62 , and the two springs 62 are connected to two opposite fan blades 2 respectively.
[0028] The connecting rod 4 is divided into two layers, the upper layer connecting rod 4 is connected to the top of the fan blade 2, and the lower layer connecting rod 4 is connected to the bottom of the fan blade 2.
[0029] The bracket 3 includes four supporting legs 31 and two platforms 32, 33. The four supporting legs 31 are gradually opened from top to bottom, one of the platforms 32 is located at the top of the supporting leg 31, and the other platform 33 is located in the middle of the supporting leg 31. The rotating shaft is rotatably connected to the two platforms 32, 33 through bearings.
[0030] The other end of the connecting rod 4 is welded to a sleeve 41, and the sleeve 41 is sleeved on the rotating shaft 1. The screw 42 passes through the sleeve 41 and is connected to the rotating shaft 1. In this way, the connecting rod and the rotating shaft can move synchronously.
[0031] A reinforcing rod 43 is welded to the connecting rod 4 at the bottom, and the other end of the reinforcing rod 43 is welded to the sleeve 41 .
[0032] The fan blade 2 includes an arc-shaped plate 21 and three reinforcing ribs 22 . The reinforcing ribs 22 are respectively arranged at the top, the middle and the bottom of the arc-shaped plate 21 .
Claims
1. A fan automatically adjusted according to the wind volume, comprising a rotating shaft, a fan blade and a bracket, wherein the fan blade is connected to the rotating shaft through a connecting rod, one end of the connecting rod is rotatably connected to the fan blade, and the other end of the connecting rod is connected to the rotating shaft after being assembled, and the rotating shaft is rotatably connected to the bracket, characterized in that: It also includes an adjustment frame, an adjustment rod and a spring, the rotating frame is sleeved on the rotating shaft, one end of the adjustment rod is rotatably connected to the adjustment frame, the other end of the adjustment rod is rotatably connected to the fan blade, one end of the spring is connected to the fan blade, and the other end of the spring is connected to the adjustment frame, when the adjustment frame rotates relative to one side of the rotating shaft, the fan blade expands outward, when the adjustment frame rotates relative to the other side of the rotating shaft, the fan blade retracts inward, and the spring pulls the fan blade to retract inward.
2. The fan automatically adjusted according to the air volume according to claim 1, characterized in that: There are four fan blades, which are arranged longitudinally, and the outer sides of the fan blades are curved surfaces.
3. The fan automatically adjusted according to the air volume according to claim 2, characterized in that: The adjustment frame is cross-shaped, and each arm of the adjustment frame is rotatably connected with an adjustment rod.
4. The fan automatically adjusted according to the air volume according to claim 3 is characterized in that: The lengths of the four adjustment rods are the same, the connection positions of the four adjustment rods on the adjustment frame are located on the same circumference, and the connection positions of the four adjustment rods on the fan blades are located on the same circumference.
5. The fan automatically adjusted according to the air volume according to claim 4 is characterized in that: There are two springs, and the two springs are respectively connected to two opposite fan blades.
6. The fan automatically adjusted according to the air volume according to claim 5, characterized in that: The connecting rod is divided into two layers, the upper layer connecting rod is connected to the top of the fan blade, and the lower layer connecting rod is connected to the bottom of the fan blade.
7. The fan automatically adjusted according to the air volume according to claim 6, characterized in that: The bracket includes four supporting legs and two platforms. The four supporting legs are gradually opened from top to bottom. One of the platforms is located at the top of the supporting legs, and the other platform is located in the middle of the supporting legs. The rotating shaft is rotatably connected to the two platforms through bearings.
8. The fan automatically adjusted according to air volume according to claim 1, characterized in that: The other end of the connecting rod is welded on a sleeve, the sleeve is sleeved on the rotating shaft, and the screw passes through the sleeve and is connected to the rotating shaft.
9. The fan automatically adjusted according to the air volume according to claim 8, characterized in that: A reinforcing rod is welded to the connecting rod located at the bottom, and the other end of the reinforcing rod is welded to the sleeve.
10. The fan automatically adjusted according to air volume according to claim 1, characterized in that: The fan blade comprises an arc-shaped plate and three reinforcing ribs, wherein the reinforcing ribs are respectively arranged at the top, the middle and the bottom of the arc-shaped plate.