Fan wheel structure

Abstract

The application relates to a fan technical field, and provides a fan impeller structure, the impeller structure comprises a central shaft and a blade, further comprises a base plate coaxially arranged with the central shaft, the blade is fixedly connected with the base plate, and the outer end of the blade is bent into a bending part located on the inner side of the base plate; the impeller structure of the application embodiment fixes the blade through the base plate, and the bending part is located on the inner side of the base plate to improve the stability; compared with the prior art, the vibration of the outer end of the blade can be reduced, the stress concentration effect of the blade root can be reduced, and the service life of the blade can be prolonged.

Description

Technical Field

[0001] This application relates to the field of wind turbine technology, and in particular provides a wind turbine impeller structure. Background Technology

[0002] The impeller is an important component of a fan. Existing impellers generally consist of a central shaft and blades. The blades are uniformly fixed to the central shaft along the circumference, and the central shaft rotates synchronously with the drive shaft.

[0003] However, when the impeller rotates, the vibration at the outer end of the blades can cause stress concentration at the blade root, which can affect the blade life. Utility Model Content

[0004] The purpose of this application is to provide a wind turbine impeller structure that aims to solve the problem of stress concentration at the blade root caused by vibration at the outer end of the blade in related technologies.

[0005] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0006] This application provides a wind turbine impeller structure, including a central shaft and blades, and a base plate arranged coaxially with the central shaft. The blades are fixedly connected to the base plate, and the outer ends of the blades are bent into bent portions located inside the base plate.

[0007] The impeller structure provided in this application provides a base plate on the central shaft to fix the blades, and a bent portion located inside the base plate is formed by bending the outer end of the blades to improve the stability of the blades. Thus, by fixing the blades with the base plate and improving stability by having the bent portion located inside the base plate, the vibration at the outer end of the blades can be reduced compared to the prior art. As a result, the stress concentration effect at the root of the blades is reduced, and the blade life can be extended.

[0008] In some embodiments, the blades are arranged perpendicular to the substrate.

[0009] In some embodiments, the bend is arranged at an obtuse angle to the blade.

[0010] In some embodiments, the bent portion is provided with a reinforcing plate that is fixedly connected to the substrate.

[0011] In some embodiments, the reinforcing plate is arranged perpendicular to the substrate.

[0012] In some embodiments, the reinforcing plate is arranged perpendicular to the blade.

[0013] In some embodiments, the width of the reinforcing plate increases outwards from the substrate.

[0014] In some embodiments, the reinforcing plate is at the same height as the bend.

[0015] In some embodiments, the reinforcing plate and the blade are placed on both sides of the bend.

[0016] In some embodiments, the height of the blades increases outwards from the central axis. Attached Figure Description

[0017] Exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments described below are for illustrative purposes only and are not intended to limit the scope of this application. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the impeller structure provided in an embodiment of this application;

[0019] Figure 2 A top view of the impeller structure provided in an embodiment of this application;

[0020] Figure 3 A front view of the impeller structure provided in an embodiment of this application;

[0021] The following are the labeling elements in the figure:

[0022] 100. Impeller structure;

[0023] 10. Central axis;

[0024] 20. Blade; 21. Bending section; 22. Reinforcing plate;

[0025] 30. Substrate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of this application is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0027] The impeller is an important component of a fan. Existing impellers generally consist of a central shaft and blades. The blades are uniformly fixed to the central shaft along the circumference, and the central shaft rotates synchronously with the drive shaft.

[0028] However, when the impeller rotates, the vibration at the outer end of the blades can cause stress concentration at the blade root, which can affect the blade life.

[0029] Based on the above considerations, in order to solve the problem of stress concentration at the blade root caused by vibration at the outer end of the blade in existing impellers, a new impeller structure for wind turbines was designed. The blades are fixed by setting a base plate on the central shaft, and the outer end of the blade is bent into a bent portion located inside the base plate to improve the stability of the blade. Thus, by fixing the blade with the base plate and improving stability by placing the bent portion inside the base plate, the vibration at the outer end of the blade can be reduced compared to the existing technology. As a result, the stress concentration effect at the blade root is reduced, and the blade life can be extended.

[0030] The impeller structure of the present application embodiment will now be described in detail.

[0031] Please see Figures 1 to 3 This application provides a wind turbine impeller structure 100, including a central shaft 10 and blades 20. It also includes a base plate 30 arranged coaxially with the central shaft 10. The blades 20 are fixedly connected to the base plate 10, and the outer end of the blades 20 is bent into a bent portion 21 located inside the base plate 30.

[0032] The substrate 30 is constructed as a disk arranged coaxially with the central shaft 10, and the substrate 30 is connected to the central shaft 10 and the blade 20 by welding.

[0033] A shaft hole is provided at the axis of the central shaft 10. This shaft hole is used for assembly and connection with the drive shaft of the drive mechanism, which is used to drive the impeller structure 100 to rotate.

[0034] Optionally, the root of the blade 20 is welded to the outer wall of the central shaft 10, and the blade 20 is vertically welded to the substrate 30. Multiple blades 20 are evenly distributed around the central shaft 10. The bent portion 21 at the outer end of the blade 20 is inclined in a counterclockwise direction, and the bent portion 21 and the blade 20 are arranged at an obtuse angle. The bent portion 21 is arranged inside the substrate 30, that is, the bent portion 21 does not extend to the outside of the substrate 30, which improves the stability of the overall structure of the blade 20.

[0035] The height of the blade 20 increases outward from the central axis 10. The bent portion 21 is formed by bending the blade 20. The bent portion 21 is welded to the substrate 30 and is arranged perpendicular to the substrate 30. The bent portion 21 is at the same height as the outer end of the blade 20.

[0036] The impeller structure 100 provided in this application embodiment fixes the blade 20 by setting a base plate 30 on the central shaft 10, and improves the stability of the blade 20 by bending the outer end of the blade 20 into a bent portion 21 located inside the base plate 30. Thus, by fixing the blade 20 with the base plate 30 and improving stability by the bent portion 21 located inside the base plate 30, the vibration of the outer end of the blade can be reduced compared with the prior art. As a result, the stress concentration effect at the root of the blade is reduced and the blade life can be extended.

[0037] Please see Figures 1 to 3 In some embodiments, a reinforcing plate 22 is welded to the bent portion 21, and the reinforcing plate 22 is welded to the substrate 30.

[0038] Optionally, the reinforcing plate 22 is vertically welded to the substrate 30, and the reinforcing plate 22 is arranged perpendicularly to the blade 20. The reinforcing plate 22 is at the same height as the bending portion 21. The reinforcing plate 22 and the blade 20 are placed on both sides of the bending portion 21. The width of the reinforcing plate 22 increases outward from the substrate 30. The reinforcing plate 22 is constructed as a right trapezoid. The reinforcing plate 22 is arranged on the inner side of the substrate 30, that is, the reinforcing plate 22 does not extend to the outer side of the substrate 30.

[0039] The reinforcing plate 22 is welded to the outer end of the bending part 21, which can improve the structural strength of the bending part 21 and ensure the overall structural stability of the blade 20.

[0040] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fan impeller structure comprising a central shaft and blades, characterized by, It also includes a base plate arranged coaxially with the central axis, the blade is fixedly connected to the base plate, the outer end of the blade is bent into a bent portion located inside the base plate, the blade is arranged perpendicularly to the base plate, the bent portion is arranged at an obtuse angle to the blade, and a reinforcing plate fixedly connected to the base plate is provided on the bent portion.

2. The fan impeller structure according to claim 1, characterized in that, The reinforcing plate is arranged perpendicularly to the substrate.

3. The fan impeller structure according to claim 2, characterized in that, The reinforcing plate is arranged perpendicular to the blade.

4. The fan impeller structure according to claim 3, characterized in that, The width of the reinforcing plate increases outwards from the base plate.

5. The fan impeller structure according to claim 4, characterized in that, The reinforcing plate is at the same height as the bent portion.

6. The wind turbine impeller structure according to claim 5, characterized in that, The reinforcing plate and the blade are respectively placed on both sides of the bent portion.

7. The fan impeller structure according to claim 6, characterized in that, The height of the blade increases outwards from the central axis.

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