CN219317099U

CN219317099U - Fan blade and wind driven generator

Info

Publication number: CN219317099U
Application number: CN202320937671.5U
Authority: CN
Inventors: 李钊明
Original assignee: Shanghai Jiuneng Energy Technology Development Co Ltd
Current assignee: Shanghai Jiuneng Energy Technology Development Co Ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-07-07
Anticipated expiration: 2033-04-24

Abstract

The utility model provides a fan blade and a wind driven generator, wherein the fan blade comprises a base, a support installation part and a blade part, and the base plays a role in fixation; the lower end of the support mounting part is connected with the base, and the axial direction is vertically upward; the blade part comprises a rotatable blade and a blade mounting part, the blade mounting part is connected with the support mounting part and can horizontally rotate relative to the base, and the rotatable blade is rotatably connected with the blade mounting part and can rotate around an axis parallel to the normal direction of the plane where the blade mounting part is located. The fan blade can improve the wind speed application range and the wind energy utilization rate of the fan blade, better protect the blade at high wind speed and reduce the cost.

Description

Fan blade and wind driven generator

Technical Field

The utility model relates to the technical field of fans, in particular to a fan blade and a wind driven generator.

Background

With the emphasis of the national green development and sustainable development, the demands of the whole society for clean energy, low-carbon energy and renewable energy are increasingly greater, and particularly the demands for efficient utilization of wind energy are also increasingly urgent. In the prior art, the blades of the wind driven generator are generally axially parallel to the wind direction, namely, each blade is radially distributed around an axis parallel to the wind direction, pressure difference is generated by depending on different wind speeds at two sides of the blade, and tangential force is generated to drive the fan blade to rotate; or the component force of wind force acting on the tangential direction of the blade is used as acting force for driving the fan blade to rotate by means of the blade inclination angle, but the wind energy utilization rate of the scheme is still not high, the blade cannot be effectively protected when the wind force is overlarge, and the blade is extremely easy to damage at high wind speed.

Therefore, how to solve the technical problems of limited application range of wind speed, low wind energy utilization rate, better protection of the blades at high wind speed, cost reduction and the like of the conventional fan blades is a difficulty in urgent need of improvement by the skilled in the art.

Disclosure of Invention

Aiming at least one technical problem, the utility model provides a fan blade and a wind driven generator, which can improve the wind speed application range and the wind energy utilization rate of the fan blade, better protect the blade at high wind speed and reduce the cost.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a fan blade comprises a base, a supporting and mounting part and a blade part, and is characterized in that,

the base plays a role in fixation;

the lower end of the support mounting part is connected with the base, and the axial direction is vertically upward;

the blade part comprises a rotatable blade and a blade mounting part, the blade mounting part is connected with the support mounting part and can horizontally rotate relative to the base, and the rotatable blade is rotatably connected with the blade mounting part and can rotate around an axis parallel to the normal direction of the plane where the blade mounting part is located.

Preferably, the rotatable blade includes a rotation shaft disposed at a position on one side of a geometric center of the rotatable blade, and the rotatable blade is rotatably connected with the blade mounting portion through the rotation shaft.

Preferably, the rotatable blade further comprises a crank fixedly connected with the rotating shaft, and the crank drives or blocks the rotation of the rotatable blade.

Preferably, the blade mounting part is provided with an elastic device, one end of the elastic device is in transmission connection with the crank, and the other end of the elastic device is in transmission connection with the blade mounting part and/or the support mounting part.

Preferably, the elastic device is a piston sealing assembly, one end of the piston sealing assembly is in transmission connection with the crank, and the other end of the piston sealing assembly can form a sealing fit structure with the blade mounting part and/or the support mounting part.

Preferably, one end of the piston sealing assembly is in transmission connection with the crank through a chute structure; or one end of the piston sealing assembly is in transmission connection with the crank through a connecting rod structure.

Preferably, the wind turbine further comprises a rudder assembly, wherein the rudder assembly is mounted on the blade mounting part and/or the support mounting part and is in transmission connection with the rotatable blade, and is used for controlling the rotation angle of the rotatable blade according to the wind direction.

Preferably, the rudder assembly comprises a rudder piece and a blade limiting device in transmission connection with the rudder piece, wherein the rudder piece rotates according to the wind direction to drive the blade limiting device to rotate, and the blade limiting device limits the rotatable blade rotation angle through an elastic device.

Preferably, the rotatable blade comprises an upper blade portion and a lower blade portion, and the crank is disposed between and fixedly connected to the upper blade portion and the lower blade portion.

A second object of the present utility model is to provide a wind power generator, in which at least one of the above-mentioned fan blades is mounted, and the generator is driven to rotate by rotation of the fan blade to generate electric power.

Compared with the prior art, the utility model has the following beneficial technical effects:

according to the fan blade, the blade mounting part is connected with the support mounting part and can horizontally rotate relative to the base, and the rotatable blade is rotatably connected with the blade mounting part and can rotate around an axis parallel to the normal direction of the plane where the blade mounting part is located. The wind power in the coverage area of the blade can be completely converted into power for pushing the blade to rotate, the angle of the blade can be adjusted in real time according to the wind direction, the wind power blown in any direction is captured, the wind power utilization rate is high, the windward area of the rotatable blade can be reduced under high wind speed, and the blade is protected from being damaged by wind power. The fan blade has the technical effects of wide wind speed application range and low installation cost.

Drawings

Fig. 1 is a schematic perspective view of a fan blade according to a first embodiment of the present utility model.

Fig. 2 is a front cross-sectional view of fig. 1.

Fig. 3 is a partial view of the left single arm of fig. 2 from a top view along section A-A.

FIG. 4 is a schematic view showing the operation of the fan blade according to the first embodiment of the present utility model under the action of upward wind.

In the figure: 1-base, 2-support installation department, 3-blade portion, 4-piston seal assembly, 5-rudder assembly, 31-rotatable blade, 32-blade installation department, 41-spout structure, 42-seal fit structure, 51-rudder piece, 52-blade stop device, 311-pivot, 312-crank.

Description of the embodiments

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus or methods consistent with some aspects of the present application as detailed in the accompanying claims.

As shown in fig. 1, the fan blade of the present utility model comprises a base 1, a support mounting part 2 and a blade part 3, wherein the base 1 has a fixing function; the lower end of the support mounting part 2 is connected with the base 1, and the axial direction is vertically upward; the blade part 3 includes a rotatable blade 31 and a blade mounting part 32, the blade mounting part 32 is connected to the support mounting part 2 and is rotatable horizontally with respect to the base 1, and the rotatable blade 31 is rotatably connected to the blade mounting part 32 and is rotatable about an axis parallel to a normal direction of a plane in which the blade mounting part 32 is located.

It will be appreciated that the base 1 may be fixed on the ground, or may be fixed on other objects, such as a generator flange, etc., and may be fixed by a detachable fixing manner such as a bolt and a nut, or may be fixed by a non-detachable fixing manner such as riveting or welding, etc., so long as the fan blade of the present utility model can be fixed to a certain extent, and the specific fixing position and fixing structure are not limited by the present utility model.

The lower end of the support mounting part 2 is connected to the base 1, which may be a fixed connection or a rotatable connection, it being understood that the support mounting part 2 is intended to provide mounting support in the height direction for the fan blade assembly according to the utility model, so that the most preferred embodiment of the axial direction of the support mounting part 2 is vertically upwards, but it is not excluded that other pointing directions, for example pointing obliquely upwards, are also possible. It can be understood that the portion of the lower end of the support mounting portion 2 connected to the base 1 may be one member, or may be a plurality of members, for example, the lower end of the support mounting portion 2 may be a single pillar connected to the base 1, or the lower end of the support mounting portion 2 may be divided into at least 3 support legs respectively connected to the base 1, so as to obtain a better support mounting effect; the lower end of the support mounting portion 2 may be divided into at least 3 support legs, which are respectively connected with different bases 1, so as to obtain a better support mounting effect, and reduce the mounting cost.

The blade part 3 includes a rotatable blade 31 and a blade mounting part 32, as can be seen from fig. 1, the rotatable blade 31 is mounted and fixed by the blade mounting part 32, and the blade mounting part 32 is connected with the support mounting part 2, so that a transverse mounting space is provided for the rotatable blade 31. The blade mounting portion 32 may rotate horizontally with respect to the base 1, that is, when the support mounting portion 2 may rotate horizontally with respect to the base 1, the blade mounting portion 32 may be fixedly connected to the support mounting portion 2, and at this time, the blade mounting portion 32 may rotate horizontally with respect to the base 1 together with the support mounting portion 2; when the support mounting portion 2 is fixedly connected with the base 1, the blade mounting portion 32 may be rotatably connected with the support mounting portion 2, and at this time, the blade mounting portion 32 may be horizontally rotated with respect to the support mounting portion 2 and the base 1. The rotatable blade 31 may be rotatably connected to the blade mounting portion 32 by a shaft hole, wherein the rotatable blade 31 may be provided with a rotation shaft or a mounting hole for mounting the rotation shaft, and the rotatable blade 32 may be provided with a mounting hole for mounting the rotation shaft or the rotation shaft; mounting holes for mounting the rotation shaft may be provided in both the rotatable blade 31 and the blade mounting portion 32, and the rotatable blade 31 and the blade mounting portion 32 may be rotatably connected by individually mounting the rotation shaft; the rotatable blades 31 and the blade mounting portions 32 may be provided with rotation shafts, and the rotatable blades 31 and the blade mounting portions 32 may be rotatably connected by a single rotatable coupling structure, and the specific structure is not limited herein. After the rotatable blade 31 and the blade mounting portion 32 are mounted, the rotatable blade 31 may rotate about an axis parallel to a normal direction of a plane in which the blade mounting portion 32 is located, in this embodiment, the plane in which the blade mounting portion 32 is located is a horizontal plane, and the normal direction thereof is a vertical direction, that is, the rotatable blade 31 may rotate about an axis in the vertical direction after being mounted on the blade mounting portion 32.

Because wind energy is generally caused by air convection in the horizontal direction, the rotatable blades 31 rotate around the axis in the vertical direction, so that the windward area of the fan blades can be adjusted steplessly between 0 and the full area of the blades. Therefore, as shown in fig. 2 and 4, on the windward side of the rotatable blade 31, the rotatable blade 31 may be rotated to be perpendicular to the wind blowing direction, the windward area is the largest, and the wind force received at this time is all converted into the force pushing the blade mounting portion 32 to rotate around the base, at the same time, on the upwind side of the rotatable blade 31, the rotatable blade 31 may be rotated to be parallel to the wind blowing direction, and the windward area is the smallest, and the wind force received at this time is almost 0, so, at this time, the wind force received on the windward side of the rotatable blade 31 is almost all converted into the force pushing the blade mounting portion 32 to rotate around the base, therefore, the wind force in the blade coverage area can be almost all converted into the force pushing the blade to rotate, and the blade angle can be adjusted in real time according to the wind direction, the wind force blown in any direction is captured, and the wind energy utilization rate is high. Meanwhile, in order to protect the fan blade structure at high wind speed, the size of wind force borne by the rotatable blades 31 is reduced, the rotatable blades 31 can rotate around the axis in the vertical direction, the windward area of the rotatable blades 31 is reduced, and the fan blade overall structure is protected from being damaged by wind force. Meanwhile, due to the high-efficiency wind capturing structure at low wind speed and the structural protection mechanism at high wind speed, the fan blade has the good technical effect of wide wind speed application range, and meanwhile, compared with the mode of hoisting the main structural weight of the fan blade to the high altitude for installation and debugging in the prior art, the structure mode of horizontally installing the fan blade has the advantages of greatly saving manpower and material resources and achieving the technical effect of saving installation cost.

In a preferred embodiment of the present utility model, the rotatable blade 31 includes a rotation shaft 311, the rotation shaft 311 is disposed at a position on one side of the geometric center of the rotatable blade 31, and the rotatable blade 31 is rotatably coupled to the blade mounting portion 32 through the rotation shaft 311. By means of the arrangement, the windward area of the rotatable blade 31 on the side doing negative work against the wind can be automatically adjusted by utilizing the wind power difference value on the blades on the two sides of the rotating shaft 311, the technical effect that the windward area on the side doing negative work against the wind is always 0 is achieved, any extra power is not needed to drive the rotatable blade 31 to rotate around the axis in the vertical direction, energy consumption is reduced, and the utilization rate of wind energy is further improved.

In another preferred embodiment of the present utility model, the rotatable blade 31 further includes a crank 312, and the crank 312 is fixedly connected to the rotation shaft 311, and drives or blocks the rotation of the rotatable blade 31 through the crank 312. By means of the arrangement, the purpose of driving or blocking the rotation of the rotatable blade 31 can be achieved by connecting the driving structure or the damping structure with the crank 312, and the installation structure of the rotatable blade 31 can be simplified, so that the later maintenance and replacement are facilitated.

In another preferred embodiment of the utility model, the blade mounting part 32 is provided with elastic means, which are in driving connection with the crank 312 at one end and with the blade mounting part 32 and/or the support mounting part 2 at the other end. The elastic device may be a spring structure, an air compression structure, a spring damping structure or other structure device with a certain elasticity, and the device may provide a certain angle maintaining force for the blade when the rotatable blade 31 turns to the windward working side, so as to avoid the phenomenon that the windward working side of the rotatable blade 31 deflects under the action of the wind difference on the blades on both sides of the rotating shaft 311, resulting in reduction of windward area and low wind energy utilization rate. Meanwhile, when the wind speed is too high, the elastic device is compressed by utilizing the wind difference values on the blades at two sides of the rotating shaft 311, so that the windward area of the rotatable blade 31 is reduced, the fan blade structure is protected, and the safety and the service life of the fan blade structure are improved.

In another preferred embodiment of the present utility model, as shown in fig. 2 and 3, the elastic device is a piston seal assembly 4, one end of the piston seal assembly 4 is in driving connection with the crank 312, and the other end of the piston seal assembly can form a sealing engagement structure 42 with the blade mounting portion 32 and/or the support mounting portion 2. Adopt piston seal assembly 4 as resilient means, compare in other resilient means, piston seal assembly 4 has simple structure, control portably, characteristics such as fatigue life is long, reduces fan blade's maintenance cost.

In another preferred embodiment of the present utility model, as shown in fig. 3, one end of the piston seal assembly 4 is in driving connection with the crank 312 through a chute structure 41; alternatively, one end of the piston seal assembly 4 is in driving connection with the crank 312 via a connecting rod structure. One end of the piston sealing assembly 4 is in transmission connection with the crank 312 through a chute structure 41, so that the structure is simple and the reliability is high; one end of the piston sealing assembly 4 is in transmission connection with the crank 312 through a connecting rod structure, so that the transmission efficiency is high, the energy loss is low, and the wind energy utilization rate is higher.

In another preferred embodiment of the present utility model, the rudder unit 5 is mounted on the blade mounting portion 32 and/or the support mounting portion 2, and is in driving connection with the rotatable blade 31, so as to control the rotation angle of the rotatable blade 31 according to the wind direction. The rudder assembly 5 can detect the direction of wind power in real time, so that the rotatable blades 31 can conveniently adjust the maximum windward area at windward acting side always according to the direction of wind power, and the minimum windward area at upwind acting side always, thereby maximally utilizing the wind power blown in all directions and further improving the wind power utilization rate.

In another preferred embodiment of the present utility model, the rudder unit 5 includes a rudder piece 51 and a blade limiting device 52 drivingly connected to the rudder piece 51, wherein the rudder piece 51 rotates according to the wind direction to drive the blade limiting device 52 to rotate, and the blade limiting device 52 defines the rotation angle of the rotatable blade 31 through an elastic device. The rudder piece 51 drives the blade limiting device 52, and the blade limiting device 52 limits the rotation angle of the rotatable blade 31 through the elastic device, so that the structure is simple and reliable, the windward areas of the windward acting side and the windward acting side of the upwind acting side are automatically and real-timely adjusted completely by means of wind power and the self structure of the fan blade, wind energy is utilized to the maximum extent, extra energy for driving the rotatable blade 31 to rotate in real time is avoided, and the wind energy utilization rate is further improved.

In another preferred embodiment of the present utility model, the rotatable blade 31 includes an upper blade portion and a lower blade portion, and the crank 312 is disposed between and fixedly coupled to the upper blade portion and the lower blade portion. By the arrangement, the blade mounting part 32 is balanced in stress, the service life of the fan blade is prolonged, and the use cost of the fan blade is further reduced.

The second embodiment of the present utility model provides a wind driven generator, where at least one of the fan blades is installed, and the wind driven generator is driven to rotate by virtue of rotation of the fan blade, so as to generate electric power, and the wind driven generator has the same technical effects as the fan blade, and is not described herein again.

In the present utility model, the term "upper end" should be understood to include an upper portion or a top end, and the term "lower end" should be understood to include a lower portion or a bottom end, and the terms "upper end" and "lower end" are each only meant to be disposed opposite to each other with respect to the drawings. In the present utility model, the expressions "first" and "second" are used only to distinguish between different structures or functions, and do not indicate a sequence or importance.

The above description of the specific embodiments of the present utility model has been given by way of example only, and the present utility model is not limited to the above described specific embodiments. Any equivalent modifications and substitutions for this practical use will also occur to those skilled in the art, and are within the scope of the present utility model. Accordingly, equivalent changes and modifications are intended to be included within the scope of the present utility model without departing from the spirit and scope thereof.

Claims

1. A fan blade comprises a base (1), a support installation part (2) and a blade part (3), and is characterized in that,

the base (1) plays a role in fixation;

the lower end of the support mounting part (2) is connected with the base (1), and the axial direction is vertically upward;

the blade part (3) comprises a rotatable blade (31) and a blade mounting part (32), the blade mounting part (32) is connected with the support mounting part (2) and can horizontally rotate relative to the base (1), and the rotatable blade (31) is rotatably connected with the blade mounting part (32) and can rotate around an axis parallel to the normal direction of the plane of the blade mounting part (32).

2. The fan blade according to claim 1, wherein the rotatable blade (31) includes a rotation shaft (311), the rotation shaft (311) is provided at a position on one side of a geometric center of the rotatable blade (31), and the rotatable blade (31) is rotatably connected with the blade mounting portion (32) through the rotation shaft (311).

3. The fan blade according to claim 2, wherein the rotatable blade (31) further comprises a crank (312), the crank (312) being fixedly connected to the rotation shaft (311) and being driven or hindered by the crank (312) to rotate the rotatable blade (31).

4. A fan blade according to claim 3, characterized in that the blade mounting part (32) is fitted with elastic means, which are in driving connection with the crank (312) at one end and with the blade mounting part (32) and/or the support mounting part (2) at the other end.

5. Fan blade according to claim 4, wherein the elastic means is a piston seal assembly (4), one end of the piston seal assembly (4) being in driving connection with the crank (312) and the other end being adapted to form a sealing engagement structure (42) with the blade mounting portion (32) and/or the support mounting portion (2).

6. Fan blade according to claim 5, wherein one end of the piston seal assembly (4) is in driving connection with the crank (312) via a chute structure (41); or one end of the piston sealing assembly (4) is in transmission connection with the crank (312) through a connecting rod structure.

7. Fan blade according to any of claims 1 to 6, further comprising a rudder assembly (5), wherein the rudder assembly (5) is mounted to the blade mounting portion (32) and/or the support mounting portion (2) and is in driving connection with the rotatable blade (31) for controlling the rotational angle of the rotatable blade (31) according to the direction of the wind.

8. Fan blade according to claim 7, wherein the rudder assembly (5) comprises a rudder piece (51) and a blade limiting device (52) in transmission connection with the rudder piece (51), wherein the rudder piece (51) rotates according to the wind direction, the blade limiting device (52) is driven to rotate, and the blade limiting device (52) limits the rotation angle of the rotatable blade (31) through an elastic device.

9. A fan blade according to claim 3, wherein the rotatable blade (31) comprises an upper blade part and a lower blade part, the crank (312) being arranged between and fixedly connected to the upper blade part and the lower blade part.

10. A wind power generator, characterized in that at least one fan blade according to any one of the preceding claims 1-9 is mounted on the wind power generator, and the generator is driven to rotate by means of rotation of the fan blade to generate electric power.