阅读说明：本技术 变形式风力发电机叶片 (Deformation type wind driven generator blade ) 是由 杨瑞 郭瑞 张�浩 刘爱瑜 全佩 张康康 于 2018-08-03 设计创作，主要内容包括：变形式风力发电机叶片,由叶片骨架(1)、连接横梁(2)、微型电动推杆(3)、活动横梁(4)、叶片内铺层(5)、叶片外弹性蒙皮(6)和独立尾缘(7)组成,叶片骨架(1)截面处通过连接横梁(2)径向固定,叶片骨架(1)截面内设有导槽(8),导槽(8)内、以及叶片骨架(1)尾缘处分别固定设置微型电动推杆(3),叶片活动横梁(4)两端伸进导槽(8)中,叶片骨架(1)外部设置叶片内铺层(5),叶片骨架(1)尾缘设置独立尾缘(7),叶片内铺层(5)外部设置有叶片外弹性蒙皮(6)。本发明有益效果：根据不同风速进行变形,调节叶片的气动性能,控制风力机功率输出,可取代传统风力机的变桨距控制系统。(Deformable formula aerogenerator blade, by blade skeleton (1), connect crossbeam (2), miniature electric putter (3), movable cross beam (4), layer (5) are spread in the blade, blade outer elastic skin (6) and independent trailing edge (7) are constituteed, blade skeleton (1) cross-section department is through connecting crossbeam (2) radial fixed, be equipped with guide slot (8) in blade skeleton (1) cross-section, in guide slot (8), and blade skeleton (1) trailing edge punishment do not fixed set up miniature electric putter (3), blade movable cross beam (4) both ends stretch into in guide slot (8), blade skeleton (1) outside sets up layer (5) are spread in the blade, blade skeleton (1) trailing edge sets up independent trailing edge (7), layer (5) outside is provided with blade outer elastic skin (6) to blade inner spread. The invention has the beneficial effects that: the wind turbine is deformed according to different wind speeds, the pneumatic performance of the blades is adjusted, the power output of the wind turbine is controlled, and a variable pitch control system of the traditional wind turbine can be replaced.)

1. Deformation formula aerogenerator blade, its characterized in that: the generator blade consists of a blade framework (1), a connecting crossbeam (2), a miniature electric push rod (3), a movable crossbeam (4), a blade internal laying layer (5), a blade external elastic skin (6) and an independent tail edge (7), wherein the section of the blade framework (1) is radially fixed through the connecting crossbeam (2), a guide groove (8) is arranged in the section of the blade framework (1), the miniature electric push rod (3) is fixedly arranged in the guide groove (8) and at the tail edge of the blade framework (1) respectively, two ends of the blade movable crossbeam (4) extend into the guide groove (8), the blade internal laying layer (5) is arranged outside the blade framework (1), the movable crossbeam (4) is wrapped in the guide groove, the independent tail edge (7) which is matched with the tail edge of the blade framework (1) to work is arranged at the tail edge of the blade framework (1), the blade internal laying layer (5) is externally provided with the blade external elastic skin (6) which can wrap the whole structure, forming the outer shell of the blade.

2. The deformation type wind power generator blade according to claim 1, wherein the number of the guide grooves (8) is 4-6.

Technical Field

The invention relates to a deformable wind driven generator blade, and belongs to the technical field of wind driven generators.

Background

Because the wind turbine operates under the working conditions of wind speed change such as gust, the wind driven generator needs to have an adjusting function in the operation process so as to control the wind energy captured by the wind driven generator. On one hand, the maximum energy is ensured to be obtained, and meanwhile, the impact of wind on the wind turbine is reduced. In order to realize the functions, the wind turbine adopts a variable pitch control technology. The technology is mainly based on adjusting the pitch angle of the blade, so that the attack angle of the blade by airflow is changed, the pneumatic performance of the blade is changed, and the wind energy captured by the wind wheel is controlled.

The aerodynamic performance of a wind turbine is mainly determined by the aerodynamic performance of a blade airfoil, and factors influencing the airfoil performance mainly have two reasons: firstly, the motion state of the incoming flow; the second is the geometrical shape of the airfoil, such as the camber, thickness, etc. of the airfoil. A large number of experimental researches prove that the lift-drag ratio of the airfoil profile can be obviously improved by increasing the camber and the thickness of the airfoil profile, and the aerodynamic performance of the airfoil profile is improved. Therefore, when the incoming flow wind speed is low, the thickness and the bending degree of the blade are increased, the pneumatic performance of the blade can be improved, and the output power of the wind turbine is improved; when the wind speed is too high, the thickness and the camber of the blade can be reduced, the pneumatic performance of the blade is reduced, and the output power of the wind turbine is reduced.

The aerodynamic performance of the wind turbine blade can be directly influenced by the airfoil, and the aerodynamic performance of the airfoils with different thicknesses and different curvatures has obvious difference. The invention provides a means for controlling the power of a wind power generator by changing the thickness and the camber of the airfoil section of a blade based on the influence of the thickness and the camber of the airfoil section on the aerodynamic performance of the airfoil section.

Disclosure of Invention

The main principle of the invention is that a miniature electric push rod controlled by an electronic signal pushes a movable cross beam to move up and down, the maximum thickness of the blade and the angle of the tail edge of the blade are changed, the pneumatic appearance of the blade is further changed, the pneumatic performance of the wind turbine is adjusted, and the purpose of controlling the output power of the wind turbine is realized.

The invention relates to a deformation type wind driven generator blade, which consists of a blade framework 1, a connecting crossbeam 2, a miniature electric push rod 3, a movable crossbeam 4, a blade inner laying layer 5, a blade outer elastic skin 6 and an independent tail edge 7, wherein the section of the blade framework 1 is radially fixed through the connecting crossbeam 2, a guide groove 8 is arranged in the section of the blade framework 1, the miniature electric push rod 3 is respectively and fixedly arranged in the guide groove 8 and at the tail edge of the blade framework 1, two ends of the blade movable crossbeam 4 extend into the guide groove 8, the blade inner laying layer 5 is arranged outside the blade framework 1, the movable crossbeam 4 is wrapped in the blade framework, the independent tail edge 7 which is matched with the tail edge of the blade framework 1 to work is arranged at the tail edge of the blade framework 1, and the blade outer elastic skin 6 capable of wrapping the whole structure is arranged outside the blade inner laying layer 5 to form a shell of the.

The number of the guide grooves 8 is 4-6.

The invention has the beneficial effects that:

1) in the operation process of the wind turbine, the anemoscope monitors the wind speed and transmits signals to the blade deformation controller, the miniature electric push rods 3 fixed on each blade framework 1 are controlled to work, the movable cross beam 4 is pushed to move up and down immediately to reflect that the blade appearance on the blade inner laying layer 5 and the blade outer elastic skin 6 is expanded and reduced in different degrees, and meanwhile, the two miniature electric push rods 3 at the tail edge of the blade framework 1 are controlled to work in opposite directions, so that the independent tail edge 7 of the blade generates deflection at a certain angle, the pneumatic appearance of the blade of the wind turbine is changed, and the power output of the wind turbine is controlled;

2) the deformable blade provided by the invention deforms according to different wind speeds, the pneumatic performance of the blade is adjusted, the power output of the wind turbine is controlled, and a variable pitch control system of the traditional wind turbine can be replaced.

Drawings

FIG. 1 is a schematic cross-sectional view of a morphing blade

FIG. 2 is a sectional assembly view of a deformed blade

FIG. 3 is a schematic view of a blade skeleton

FIG. 4 is a schematic view of a connecting beam

FIG. 5 is a schematic view of a movable cross beam

FIG. 6 is a schematic view of a micro-electric putter

FIG. 7 is a schematic view of blade deformation at low wind speeds

FIG. 8 is a schematic view of blade deformation at high wind speeds

FIG. 9 is a schematic view of the blade profile under three conditions

In the figure: the blade comprises a blade framework 1, a connecting beam 2, a miniature electric push rod 3, a movable beam 4, a blade inner laying layer 5, a blade outer elastic skin 6, an independent tail edge 7 and a guide groove 8.

Detailed Description

The invention will be further described with reference to the accompanying figures 1-9.

The blade comprises a blade framework 1, a connecting beam 2, a miniature electric push rod 3, a movable beam 4, a blade inner laying layer 5, a blade outer elastic skin 6 and an independent tail edge 7, wherein the section of the blade framework 1 is radially fixed through the connecting beam 2, a guide groove 8 is arranged in the section of the blade framework 1, the miniature electric push rod 3 is respectively and fixedly arranged in the guide groove 8 and the tail edge of the blade framework 1, two ends of the blade movable beam 4 extend into the guide groove 8, the blade inner laying layer 5 is arranged outside the blade framework 1, the movable beam 4 is wrapped in the blade framework, the tail edge of the blade framework 1 is provided with the independent tail edge 7 which is matched with the tail edge of the blade framework 1 to work, and the blade outer elastic skin 6 capable of wrapping the whole structure is arranged outside the blade inner laying layer 5 to form a shell of the blade. The number of the guide grooves 8 is 4-6. The number of the micro electric push rods 3 arranged in the guide groove 8 is two, the number of the micro electric push rods 3 arranged at the tail edge of the blade framework 1 is two, and at the initial position (at the moment of no deformation), the micro electric push rods 3 are propped against the middle position of the guide groove 8 by the micro electric push rods 3 extending out of the same length up and down and are fixed at the middle position of the guide groove 8. The movable cross beam 4 is made of glass fiber reinforced plastic composite materials, is buried in the blade internal layer 5, and moves up and down along the thickness direction of the blade through the miniature electric push rod 3 to realize the function of blade deformation; the connecting beam 2 can connect the blade frameworks 1 at different positions along the span direction to form the whole wind turbine blade structure.

The blade is specifically modified: when the wind speed is lower, the miniature electric push rod 3 on the blade framework 1, which is positioned on the outer side, namely on the side close to the outer elastic skin 6 of the blade, contracts back, the miniature electric push rod 3 on the inner side extends out to push the movable cross beam 4 to move upwards, and the thickness of the blade section airfoil is increased. The miniature electric push rod 3 that is located the top at 1 trailing edge of blade skeleton outwards promotes, and the miniature electric push rod 3 that is located the below is inwards shrink, and the combined action makes the independent trailing edge 7 of blade deflect downwards, and the camber of blade cross-section airfoil increases. The aerodynamic performance of the blade is improved, and the output power of the wind turbine is increased; when the wind speed is too high, the miniature electric push rod 3 positioned on the outer side of the blade framework 1 is pushed out, the miniature electric push rod 3 positioned on the inner side is retracted, the movable cross beam 4 is pushed to move downwards, and the thickness of the blade section wing profile is reduced. The miniature electric push rod 3 located above at the tail edge of the blade framework 1 is retracted inwards, the miniature electric push rod 3 located below is pushed outwards, the independent tail edge 7 of the blade deflects upwards under the comprehensive action, and the camber of the airfoil section of the blade is reduced. The aerodynamic performance of the blades is reduced, the output power of the wind turbine is controlled to be constant, and the safe operation of the unit under large wind speed is ensured; in fig. 9, a shows the change of the blade profile under three conditions of high wind speed, rated wind speed B, and low wind speed C.

The deformable blade provided by the invention deforms according to different wind speeds, the pneumatic performance of the blade is adjusted, the power output of the wind turbine is controlled, and a variable pitch control system of the traditional wind turbine can be replaced.