Fan blade of vertical axis fan

Abstract

The invention is applicable to the technical field of fan equipment, and provides a vertical-axis fan blade, the vertical-axis fan blade is composed of a plurality of blade units, each blade unit comprises a blade and a connecting part, the blades are connected with the connecting parts, and the connecting parts of the plurality of blade units are spliced to form a rotating shaft of the fan blade. The vertical shaft fan blade is composed of the plurality of blade units, each blade unit comprises the blade and the connecting part, the connecting parts of the plurality of blade units are spliced to form the rotating shaft of the fan blade, and the fan blade is formed by splicing. The adjacent blade units are tightly connected, so that the rotating shaft is compact in structure, the structural strength of the fan blade is high, the fan blade is designed in a modular mode, mounting and dismounting are convenient, and the situation that connection between the fan blade and the main shaft is affected due to shaking of a single fan blade is avoided.

Description

Technical Field

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

[0002] A vertical axis wind turbine, also known as a vertical axis wind turbine, is a wind turbine with the main rotor axis set perpendicular to the wind. Its main components are located at the bottom of the wind turbine, and the design is both economical and practical, as well as quiet and efficient. Vertical axis wind turbines do not need to face the wind, and there is no need to adjust the direction of the machine when the wind direction changes, which is a major advantage over horizontal axis wind turbines. A vertical axis wind turbine is an efficient and environmentally friendly wind power generation equipment with the advantages of simple structure, easy maintenance, and strong environmental adaptability. It has broad application prospects in many fields such as distributed energy systems, urban central areas, green buildings, agricultural and fishery integration, and offshore wind power development.

[0003] In the prior art, the fan blades of most vertical axis fans are fixed to the main shaft by bolts and screws, or the fan blades are respectively inserted into the main shaft and then installed on the outside of the main shaft by using a locking plate. However, the entire installation process is cumbersome and inconvenient to replace and disassemble, and the locking plate is also subjected to uneven force, causing the fan blades to shake and become disconnected from the main shaft. Summary of the invention

[0004] The purpose of an embodiment of the present invention is to provide a vertical axis fan blade, which aims to solve the problem that the fan blades and the main shaft of most vertical axis fans are fixedly connected by bolts and screws, or the fan blades are respectively inserted into the main shaft and then the fan blades are installed on the outside of the main shaft using a locking plate, but the entire installation process is cumbersome and inconvenient to replace and disassemble, and the locking plate will also be subjected to uneven force, causing the fan blades to shake and become disconnected from the main shaft.

[0005] An embodiment of the present invention is implemented as follows: a vertical axis fan blade, wherein the vertical axis fan blade is composed of a plurality of blade units, each of the blade units includes a blade and a connecting portion, the blade is connected to the connecting portion, and the connecting portions of a plurality of blade units are spliced ​​to form a rotating axis of the fan blade.

[0006] A vertical axis fan blade is provided in an embodiment of the present invention. The vertical axis fan blade is composed of a plurality of blade units, and each blade unit includes a blade and a connecting portion. The connecting portions of a plurality of blade units are spliced ​​to form a rotating axis of the fan blade. The fan blade is spliced ​​to form a fan blade. The connection between adjacent blade units is tight, so that the rotating axis structure is compact and the structural strength of the fan blade is high. The fan blade is modularly designed to facilitate installation and disassembly, thereby avoiding the shaking of a single blade affecting the connection between the blade and the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1A three-dimensional structural diagram of a vertical axis fan blade provided by an embodiment of the present invention;

[0008] Figure 2 A schematic diagram of the structure of a blade unit in a vertical axis fan blade provided by an embodiment of the present invention;

[0009] Figure 3 A schematic diagram of the structure of the connection between a connecting member and a rotating shaft in a vertical axis fan blade provided by an embodiment of the present invention;

[0010] Figure 4 A schematic diagram of the structure of a connecting plate in a vertical axis fan blade provided by an embodiment of the present invention;

[0011] Figure 5 A schematic diagram of the back structure of a connecting plate in a vertical-axis fan blade provided in an embodiment of the present invention.

[0012] In the accompanying drawings: 1, blade unit; 11, blade; 12, connecting part; 121, positioning groove; 122, first mounting hole; 2, connecting shaft; 3, connecting member; 31, mounting member; 32, connecting plate; 321, third mounting hole; 322, first positioning hole; 323, second mounting hole; 324, annular protrusion. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0014] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0015] like Figure 1 As shown, it is a structural diagram of a vertical axis fan blade provided in an embodiment of the present invention, wherein the vertical axis fan blade is composed of a plurality of blade units 1, each of the blade units 1 includes a blade 11 and a connecting portion 12, the blade 11 is connected to the connecting portion 12, and the connecting portions 12 of a plurality of blade units 1 are spliced ​​to form a rotating axis of the fan blade.

[0016] In an embodiment of the present invention, preferably, the vertical axis fan blade is suitable for a vertical axis fan, and the vertical axis fan blade is composed of a plurality of blade units 1, each blade unit 1 includes a blade 11 and a connecting portion 12, and the connecting portion 12 is used to splice to form a rotating shaft of the fan blade. The connecting portion 12 of each blade unit 1 can be a rotating shaft formed by a circumferential arrangement, and the rotating shaft formed by the tight fit between each adjacent connecting portion 12 can be used to connect with the fan main shaft, so that the vertical axis blade can be driven by the fan main shaft to rotate and the mechanical energy of the blade 11 can be converted into wind energy. The rotating shaft of the fan blade is spliced ​​to make the connection between the blade units 1 compact and have a certain force on each other, which can avoid the situation where a single blade unit 1 is detached under the action of some external force, affecting the use effect. The modular combination splicing to form the rotating shaft of the fan blade is convenient for installation and disassembly. When the fan blade is connected to the fan main shaft, the structural strength is high and the airflow control efficiency can be improved.

[0017] In one embodiment of the present invention, the present invention forms a vertical axis fan blade through a plurality of blade units 1, and each blade unit 1 includes a blade 11 and a connecting portion 12. The connecting portions 12 of a plurality of blade units 1 are spliced ​​to form a rotating axis of the fan blade. The fan blade is spliced ​​to form a fan blade. The tight connection between adjacent blade units 1 makes the rotating axis structure compact and the structural strength of the fan blade high. The fan blade is modularly designed to facilitate installation and disassembly, thereby avoiding the shaking of a single blade affecting the connection between the blade and the main shaft.

[0018] like Figure 1-3 As shown, as a preferred embodiment of the present invention, the blade 11 is in the shape of a spiral plate.

[0019] In an embodiment of the present invention, preferably, a spiral plate-shaped blade 11 is selected to make the airflow continuity of the fan blade better and the efficiency higher, and the material of the blade 11 can be selected according to the use scenario of the vertical axis fan. The blade 11 can also be a spiral with uneven thickness, and the thickness of the end of the blade 11 is less than the root thickness connected to the connecting part 12.

[0020] like Figure 1-3 As shown, as a preferred embodiment of the present invention, the upper and lower end surfaces of the connecting portion 12 are respectively provided with a positioning groove 121 and a first mounting hole 122 .

[0021] In an embodiment of the present invention, preferably, a plurality of blade units 1 are circumferentially arranged and spliced, and the blades 11 of each blade unit 1 are installed in the same direction, and the connection position between the blade 11 and the connecting portion 12 in the cross section of the blade unit 1 is always the same, which can save energy and be environmentally friendly, avoid unstable airflow and improve airflow control; preferably, after the blade units 1 are circumferentially arranged and spliced, another layer can be stacked and installed above or below the initial fan blades, and the blades 11 correspond to the blades 11, and the connecting portions 12 correspond to the connecting portions 12, thereby increasing the length of the rotating shaft, and connecting through the top surface of the fan blades to increase the contact area between the blades 11 in the blade unit 1 and the wind force, thereby increasing the thrust and rotational force, and improving the power generation efficiency of the fan. The thickness of the connecting portion 12 is greater than that of the blade 11 and the upper and lower end surfaces of the connecting portion 12 are respectively lower than the side surfaces of the blade 11; preferably, a positioning groove 121 and a connected first mounting hole 122 are respectively provided on the upper and lower end surfaces of the connecting portion 12, and the positioning groove 121 may be close to the root of the blade 11, and two first mounting holes 122 are provided, and the first mounting hole 122 may be a countersunk hole that passes through the connecting hole.

[0022] like Figure 1-3 As shown, as a preferred embodiment of the present invention, a plurality of blade units 1 are spliced ​​to form a fan blade whose upper and lower end surfaces are mirror-imaged and staggered, and the connection between the outer convex surface of the blade 11 of each blade unit 1 and the inner concave surface of the adjacent blade unit 1 is a smooth curved surface.

[0023] In an embodiment of the present invention, preferably, the spiral direction of the connecting portion 12 is the same as the spiral direction of the blade 11 and the connection position of the blade 11 and the connecting portion 12 can be in an inclined state, and the upper and lower end faces of the spliced ​​fan blades are mirror-imaged, and the lower end face is staggered clockwise relative to the upper end face. At this time, the inward rotation direction of the blade 11 is also clockwise, and the inward rotation direction of the blade 11 is connected to the rear end of the connecting portion 12 so that a certain distance is left at the front end to avoid that when the wind drives the blade 11 to rotate, the connection position of the blade 11 and the connecting portion 12 only acts on one connection point, causing greater damage to the connecting portion 12, and the force arm between the blade 11 and the connecting portion 12 is also maximum, so that the torque transmitted by the wind to the blade 11 reduces the loss between power transmission.

[0024] like Figure 1-3 As shown, as a preferred embodiment of the present invention, the rotating shaft is used to be connected to the main shaft of the fan.

[0025] In an embodiment of the present invention, preferably, a rotating shaft formed by splicing the connecting parts 12 of several blade units 1 is connected to the main shaft to facilitate the installation of the fan blades on the fan main shaft, so that the blades will not loosen or fall off during rotation. The connecting part 12 ensures the coaxiality and balance of the fan blades and the fan main shaft, thereby improving the operating efficiency and life of the fan.

[0026] like Figure 1-3 As shown, as a preferred embodiment of the present invention, the blade unit 1 further includes a connecting member 3, and the connecting member 3 is used to connect the blade unit 1 and the main shaft of the fan, and the connecting member 3 is installed on the rotating shaft.

[0027] In the embodiment of the present invention, preferably, the blade unit 1 is also provided with a connecting piece 3 connected to the adjacent blade unit 1, and a plurality of blade units 1 can be connected to the fan main shaft by means of the connecting piece 3, and the connecting parts 12 of a plurality of blade units 1 are spliced ​​to form the rotating shaft of the fan blades. When the rotating shaft is connected to the fan main shaft, the connecting piece 3 installed on the rotating shaft is used to completely connect the plurality of blade units 1 to the fan main shaft so as to fix the fan blades and enhance the safety of the connection.

[0028] like Figure 1-3 As shown, as a preferred embodiment of the present invention, the connecting member 3 includes a mounting member 31 and a group of connecting plates 32, the mounting member 31 is plugged into the connecting plate 32 and the connecting portion 12, the mounting member 31 is used to connect the connecting plate 32 and the blade unit 1, a group of the connecting plates 32 are respectively installed on the upper and lower end surfaces of the rotating shaft, and the connecting plates 32 are used to connect the rotating shaft and the main shaft of the fan.

[0029] In the embodiment of the present invention, preferably, the connecting member 3 is mainly composed of a mounting member 31 and a group of connecting plates 32. The mounting member 31 can be a rod-shaped structure with a certain length. The mounting member 31 is passed through the connecting plate 32 and the first mounting hole 122 of the connecting portion 12 of the blade unit 1 to facilitate the installation of the connecting plate 32 on the blade unit 1. Several mounting members 31 can be provided to facilitate the connection of the connecting plate 32 to each blade unit 1. The connecting plate 32 is a plate-shaped structure. A group of connecting plates 32 are respectively installed on the upper and lower end surfaces of the rotating shaft and the connecting plate 32 is installed on the connecting portion 12 of the blade unit 1 by using the mounting member 31. The connecting plate 32 can also connect the rotating shaft with the fan main shaft and can withstand the centrifugal force and aerodynamic force generated during the rotation of the fan blades and the fan main shaft to improve the stability of the fan blade rotation.

[0030] like Figure 4-5 As shown, as a preferred embodiment of the present invention, the connecting plate 32 is provided with a first positioning hole 322 and a second mounting hole 323, the first positioning hole 322 is used to position the fan main shaft, and the second mounting hole 323 is used to mount the fan main shaft.

[0031] In the embodiment of the present invention, preferably, the plate-shaped connecting plate 32 can be a circular plate, and the shape and size of the connecting plate 32 are the same as the shapes of the upper and lower end surfaces of the rotating shaft formed by splicing a number of blade units 1 so as to facilitate the connection between the connecting plate 32 and the connecting portion 12 of each blade unit 1. A first positioning hole 322 can be provided at the center position of the connecting plate 32 to facilitate the plug-in positioning of the fan main shaft, and a plurality of second mounting holes 323 are provided in the circumferential direction of the contour of the first positioning hole 322 to facilitate the complete connection of the fan main shaft with the connecting plate 32.

[0032] like Figure 4-5 As shown, as a preferred embodiment of the present invention, the connecting plate 32 is provided with a plurality of circumferentially arranged third mounting holes 321 , and the third mounting holes 321 are used for mounting the mounting member 31 .

[0033] In an embodiment of the present invention, preferably, a plurality of third mounting holes 321 arranged circumferentially with the first positioning hole 322 as the center can be provided on the connecting plate 32, and the third mounting holes 321 are matched with the mounting member 31 so that the mounting member 31 can be plugged into the third mounting holes 321 and the first mounting hole 122 on the connecting part 12 to realize the installation of the connecting plate 32 on the connecting part 12.

[0034] like Figure 4-5 As shown, as a preferred embodiment of the present invention, an annular protrusion 324 is provided on the back of the connecting plate 32 , and the annular protrusion 324 is embedded in the connecting portion 12 .

[0035] In the embodiment of the present invention, preferably, an annular protrusion is provided on the back side of a connecting plate 32 having a certain thickness, and the protruding height of the protrusion is the same as the groove depth of the first positioning groove 121 on the connecting block so that the annular protrusion 324 is embedded in the connecting portion 12 of a plurality of blade units 1 and the connecting plate 32 is positioned by the first positioning groove 121, and then the mounting member 31 is inserted into the connecting plate 32 and the connecting portion 12 to realize the installation of the connecting plate 32 on the fan blade rotating shaft formed by splicing a plurality of blade units 1.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical axis fan blade, characterized in that: The vertical axis fan blade is composed of a plurality of blade units, each of which includes a blade and a connecting portion, the blade is connected to the connecting portion, and the connecting portions of a plurality of blade units are spliced ​​to form a rotating axis of the fan blade.

2. The vertical axis fan blade according to claim 1, characterized in that: The blade is in the shape of a spiral plate.

3. The vertical axis fan blade according to claim 2, characterized in that: The upper and lower end surfaces of the connecting portion are respectively provided with a positioning groove and a first mounting hole.

4. The vertical axis fan blade according to claim 1, characterized in that: The upper and lower end surfaces of the fan blades formed by splicing a plurality of the blade units are mirror-imaged and staggered, and the connection between the outer convex surface of each blade unit and the inner concave surface of the adjacent blade unit is a smooth curved surface.

5. The vertical axis fan blade according to claim 1, characterized in that: The rotating shaft is used to be connected with the main shaft of the fan.

6. The vertical axis fan blade according to claim 1, characterized in that: The blade unit also includes a connecting piece, which is used to connect the blade unit and the main shaft of the fan, and the connecting piece is installed on the rotating shaft.

7. The vertical axis fan blade according to claim 6, characterized in that: The connecting member includes a mounting member and a group of connecting plates. The mounting member is plugged into the connecting plate and the connecting portion. The mounting member is used to connect the connecting plate and the blade unit. A group of connecting plates are respectively installed on the upper and lower end surfaces of the rotating shaft. The connecting plates are used to connect the rotating shaft and the main shaft of the fan.

8. The vertical axis fan blade according to claim 7, characterized in that: The connecting plate is provided with a first positioning hole and a second mounting hole, the first positioning hole is used for positioning the fan main shaft, and the second mounting hole is used for mounting the fan main shaft.

9. The vertical axis fan blade according to claim 7, characterized in that: The connecting plate is provided with a plurality of third mounting holes arranged circumferentially, and the third mounting holes are used for mounting mounting parts.

10. The vertical axis fan blade according to claim 7, characterized in that: An annular convex block is arranged on the back side of the connecting plate, and the annular convex block is embedded in the connecting part.

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