阅读说明：本技术 一种具有组合式叶片的风电机组及其制造系统 (Wind turbine generator with combined blades and manufacturing system thereof ) 是由 郭小江 李新凯 唐巍 叶昭良 劳文欣 于 2021-09-23 设计创作，主要内容包括：本发明公开了一种具有组合式叶片的风电机组及其制造系统。该具有组合式叶片的风电机组包括设置于上风向的前风轮,前风轮包括多个前叶片,前叶片由叶根段、过渡段和叶尖段依次连接而成,并且过渡段与叶尖段和叶根段形成内凹结构；设置于下风向的后风轮,后风轮包括多个后叶片；以及能够通过前风轮和后风轮的转动发电的机舱,机舱能够与电网连通。前叶片能够分为叶尖段、叶根段和过渡段分别加工制造以后再连接在一起,形成前叶片,由于叶尖段、叶根段和过渡段较整个前叶片的体积和重量均较小,降低了在模具上的成型难度,同时单个的叶尖段、叶根段或者过渡段便于翻转,缩短了前叶片在制造时所耗费的工时,提高了风电机组的生产效率。(The invention discloses a wind turbine generator with combined blades and a manufacturing system thereof. The wind turbine generator with the combined blades comprises a front wind wheel arranged in an upwind direction, wherein the front wind wheel comprises a plurality of front blades, the front blades are formed by sequentially connecting a blade root section, a transition section and a blade tip section, and the transition section, the blade tip section and the blade root section form an inwards concave structure; the rear wind wheel is arranged in the downwind direction and comprises a plurality of rear blades; and the engine room can generate power through the rotation of the front wind wheel and the rear wind wheel, and can be communicated with a power grid. The front blade can be divided into a blade tip section, a blade root section and a transition section which are respectively processed and manufactured and then connected together to form the front blade, the size and the weight of the blade tip section, the blade root section and the transition section are smaller than those of the whole front blade, the forming difficulty on a die is reduced, meanwhile, the single blade tip section, the single blade root section or the single transition section are convenient to overturn, the working hours consumed in manufacturing the front blade are shortened, and the production efficiency of the wind turbine generator set is improved.)

1. A wind turbine having modular blades, comprising:

the front wind wheel is arranged in an upwind direction and comprises a plurality of front blades, the front blades are formed by sequentially connecting and combining a blade root section, a transition section and a blade tip section, and the transition section, the blade tip section and the blade root section form an inwards concave structure;

the rear wind wheel is arranged in the downwind direction and comprises a plurality of rear blades; and

a nacelle capable of generating electricity by rotation of the front and rear wind wheels, the nacelle being capable of communicating with an electrical grid.

2. The wind turbine generator according to claim 1, wherein the tip section is a hollow structure having a shuttle-shaped cross section, and the tip section further comprises a first reinforcing beam and a second reinforcing beam for improving strength of the tip section.

3. The wind turbine generator with modular blades of claim 1, wherein the blade root section is a hollow structure with a circular cross section, and further comprises a third reinforcing beam and a fourth reinforcing beam for improving the strength of the blade root section.

4. The wind turbine generator set with combined blades as claimed in claim 1, wherein the transition section is a solid structure with an oval cross section or a hollow structure provided with a fifth reinforcing beam.

5. The wind turbine generator with sectional blades according to claim 1, wherein the concave structure comprises a first concave wall located at the transition section, a second concave wall located at the tip section, and a third concave wall located at the root section;

the plane of the first inner concave wall is parallel to the length direction of the front blade, the second inner concave wall extends obliquely from one end, close to the blade tip section, of the first inner concave wall to one end, far away from the first inner concave wall, and the third inner concave wall extends obliquely from one end, close to the blade root section, of the first inner concave wall to one end, far away from the first inner concave wall.

6. The wind turbine generator with modular blades of claim 5, wherein the included angle between the first inner concave wall and the second inner concave wall and the included angle between the first inner concave wall and the third inner concave wall are both 30 °.

7. The wind turbine generator with modular blades of claim 1, wherein the tip section and the transition section and the root section and the transition section are connected by means of lap-joint gluing.

8. The wind turbine generator with sectional blades according to claim 1, wherein the adhesive material of the tip section and the transition section and the root section and the transition section are epoxy resin.

9. The wind turbine generator with sectional blades according to claim 1, further comprising vortex generators disposed on the front blade and the rear blade.

10. A manufacturing system of a wind turbine with sectional blades, which is used for manufacturing the wind turbine with sectional blades of any one of claims 1 to 9;

the manufacturing system of the wind turbine with the combined blade comprises a combined mould for manufacturing a front blade of the wind turbine with the combined blade, wherein the combined mould comprises a first sub-mould for manufacturing a blade tip section of the front blade, a second sub-mould for manufacturing a blade root section of the front blade and a third sub-mould for manufacturing a transition section of the front blade.

Technical Field

The invention relates to the technical field of wind turbines, in particular to a wind turbine with combined blades and a manufacturing system thereof.

Background

At present, wind turbine generator system's wind wheel blade generally adopts the integral type structure, because the wind wheel blade volume and the weight of integral type structure are all great, and the shaping degree of difficulty is great on the mould, and wind wheel blade is not convenient for overturn simultaneously, leads to wind wheel blade to consume man-hour overlength when making, and wind turbine generator system's production efficiency is low.

Therefore, how to improve the production efficiency of the wind turbine generator is a technical problem that needs to be solved by technical personnel in the field at present.

Disclosure of Invention

In view of the above, the present invention provides a wind turbine with sectional blades and a manufacturing system thereof, so as to improve the production efficiency of the wind turbine.

In order to achieve the purpose, the invention provides the following technical scheme:

a wind turbine with sectional blades, comprising:

the front wind wheel is arranged in an upwind direction and comprises a plurality of front blades, the front blades are formed by sequentially connecting and combining a blade root section, a transition section and a blade tip section, and the transition section, the blade tip section and the blade root section form an inwards concave structure;

the rear wind wheel is arranged in the downwind direction and comprises a plurality of rear blades; and

a nacelle capable of generating electricity by rotation of the front and rear wind wheels, the nacelle being capable of communicating with an electrical grid.

Preferably, in the wind turbine generator with the sectional blade, the blade tip section is a hollow structure with a shuttle-shaped cross section, and the blade tip section further includes a first reinforcing beam and a second reinforcing beam for improving the strength of the blade tip section.

Preferably, in the wind turbine generator with the sectional blade, the blade root section is a hollow structure with a circular cross section, and the blade root section further includes a third reinforcing beam and a fourth reinforcing beam for improving the strength of the blade root section.

Preferably, in the wind turbine generator with the combined blades, the transition section is a solid structure with an oval cross section or a hollow structure provided with a fifth reinforcing beam.

Preferably, in the wind turbine generator with the combined blade, the concave structure comprises a first concave wall located at the transition section, a second concave wall located at the tip section and a third concave wall located at the root section;

the plane of the first inner concave wall is parallel to the length direction of the front blade, the second inner concave wall extends obliquely from one end, close to the blade tip section, of the first inner concave wall to one end, far away from the first inner concave wall, and the third inner concave wall extends obliquely from one end, close to the blade root section, of the first inner concave wall to one end, far away from the first inner concave wall.

Preferably, in the wind turbine generator with the combined blades, an included angle between the first inner concave wall and the second inner concave wall and an included angle between the first inner concave wall and the third inner concave wall are both 30 °.

Preferably, in the wind turbine generator with the combined blade, the blade tip section and the transition section and the blade root section and the transition section are connected in an overlapping adhesive manner.

Preferably, in the wind turbine generator with the combined blade, the adhesive materials of the blade tip section and the transition section and the blade root section and the transition section are epoxy resin.

Preferably, in the wind turbine generator with the combined blades, the wind turbine generator further includes a vortex generator disposed on the front blade and the rear blade.

A manufacturing system of a wind turbine with sectional blades, which is used for manufacturing the wind turbine with sectional blades as described in any one of the above items;

the manufacturing system of the wind turbine with the combined blade comprises a combined mould for manufacturing a front blade of the wind turbine with the combined blade, wherein the combined mould comprises a first sub-mould for manufacturing a blade tip section of the front blade, a second sub-mould for manufacturing a blade root section of the front blade and a third sub-mould for manufacturing a transition section of the front blade.

When the wind turbine generator with the combined blades is used, the front blades drive the front wind wheel to rotate under the action of wind, the rear blades drive the rear wind wheel to rotate under the action of the wind, the engine room generates electricity through the rotation of the front wind wheel and the rear wind wheel, and the engine room can be communicated with a power grid, so that the engine room can directly transmit the electricity to the power grid after generating electricity through the rotation of the front wind wheel and the rear wind wheel; the front blade provided by the invention is formed by sequentially connecting the blade root section, the transition section and the blade tip section, and the transition section, the blade tip section and the blade root section form an inwards concave structure, so that when wind flows through the front blade, more wind can flow through the front wind wheel by the inwards concave structure, the rear wind wheel can absorb more wind energy, and the wind energy utilization rate and the power generation efficiency of the wind turbine with the combined blade are improved; and because the front blade is formed by sequentially connecting and combining the blade tip section, the transition section and the blade tip section, namely the front blade is of a segmented combined structure, the front blade can be divided into the blade tip section, the blade tip section and the transition section which are respectively processed and manufactured and then connected and combined together to form the front blade, the size and the weight of the blade tip section, the blade tip section and the transition section are smaller than those of the whole front blade, the forming difficulty on a mould is reduced, and meanwhile, the single blade tip section, the single blade root section or the single transition section are convenient to turn over, the working hours consumed by the front blade in manufacturing are shortened, and the production efficiency of the wind turbine generator set is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a front blade according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a blade tip segment according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a transition section according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of another transition section provided in accordance with an embodiment of the present invention;

fig. 5 is a schematic cross-sectional structure view of a blade root segment according to an embodiment of the present invention.

Wherein 100 is a tip section, 101 is a first reinforcing beam, 102 is a second reinforcing beam, 200 is a root section, 201 is a third reinforcing beam, 202 is a fourth reinforcing beam, 300 is a transition section, 301 is an inner concave structure, 3011 is a first inner concave wall, 3012 is a second inner concave wall, 3013 is a third inner concave wall, and 302 is a fifth reinforcing beam.

Detailed Description

In view of the above, the core of the present invention is to provide a wind turbine with combined blades and a manufacturing system thereof, so as to improve the power generation efficiency of an offshore wind turbine.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, an embodiment of the present invention discloses a wind turbine with combined blades, which includes a front wind wheel, a rear wind wheel and a nacelle.

The front wind wheel is arranged in an upwind direction and comprises a plurality of front blades, the front blades are formed by sequentially connecting a blade root section 200, a transition section 300 and a blade tip section 100, and the transition section 300, the blade tip section 100 and the blade root section 200 form an inwards concave structure 301; the rear wind wheel is arranged in the downwind direction and comprises a plurality of rear blades; the engine room can generate electricity through the rotation of the front wind wheel and the rear wind wheel, and the engine room can be communicated with a power grid.

When the wind turbine generator with the combined blades is used, the front blades drive the front wind wheel to rotate under the action of wind, the rear blades drive the rear wind wheel to rotate under the action of the wind, the engine room generates electricity through the rotation of the front wind wheel and the rear wind wheel, and the engine room can be communicated with a power grid, so that the engine room can directly transmit the electricity to the power grid after generating electricity through the rotation of the front wind wheel and the rear wind wheel; because the front blade provided by the invention is formed by sequentially connecting the blade root section 200, the transition section 300 and the blade tip section 100, and the transition section 300, the blade tip section 100 and the blade root section 200 form the concave structure 301, when wind flows through the front blade, more wind can flow through the front wind wheel by the concave structure 301, so that more wind energy can be absorbed by the rear wind wheel, and the wind energy utilization rate and the power generation efficiency of the wind turbine with the combined blade are improved; and, because the front blade is formed by sequentially connecting and combining the blade root section 200, the transition section 300 and the blade tip section 100, namely the front blade is a sectional combined structure, the front blade can be divided into the blade tip section 100, the blade root section 200 and the transition section 300 which are respectively processed and manufactured and then connected and combined together to form the front blade, because the volume and the weight of the blade tip section 100, the blade root section 200 and the transition section 300 are smaller than those of the whole front blade, the forming difficulty on a mould is reduced, and simultaneously, the single blade tip section 100, the blade root section 200 or the transition section 300 are convenient to turn over, the working hour consumed by the front blade in manufacturing is shortened, and the production efficiency of the wind turbine generator is improved.

It should be noted that, the present invention does not limit the parameters such as the specific shapes and sizes of the root section 200, the transition section 300 and the tip section 100, and all parameters that can satisfy the use requirements belong to the protection scope of the present invention; preferably, the present invention provides specific shapes for the root section 200, the transition section 300, and the tip section 100.

As shown in fig. 2, the tip section 100 is a hollow structure with a cross section in a shuttle shape, and the tip section 100 further includes a first reinforcing beam 101 and a second reinforcing beam 102, and the first reinforcing beam 101 and the second reinforcing beam 102 are disposed in an internal cavity of the tip section 100, so as to improve the strength of the tip section 100 through the first reinforcing beam 101 and the second reinforcing beam 102.

As shown in fig. 5, the root section 200 is a hollow structure with a circular cross section, and the root section 200 further includes a third reinforcing beam 201 and a fourth reinforcing beam 202, and the third reinforcing beam 201 and the fourth reinforcing beam 202 are disposed in an inner cavity of the root section 200, so that the strength of the root section 200 is improved by the third reinforcing beam 201 and the fourth reinforcing beam 202.

It should be noted that the number of the stiffening beams of the blade tip section 100 and the blade root section 200 is not limited to two, and in practical applications, the number of the stiffening beams may be adaptively increased or decreased according to the mechanical performance requirement of the blade, and the number of the stiffening beams that can meet the mechanical performance requirement of the blade is within the protection scope of the present invention.

As shown in fig. 3 and 4, the transition section 300 is a solid structure with an oval cross section or a hollow structure provided with a fifth reinforcing beam 302, so that the strength of the transition section 300 is improved by the fifth reinforcing beam 302, or a solid structure with higher strength is directly adopted, the structure is simple, and the processing and manufacturing are convenient.

In addition, the concave structure 301 may be in a shape of trapezoid, rectangle, or zigzag, and the like, as long as the shape can allow wind to pass through, so that the rear wind wheel can absorb more wind energy, and the shape can improve the wind energy utilization rate and the power generation efficiency of the wind turbine with the combined blades, and belongs to the protection scope of the present invention; preferably, the concave structure 301 provided by the embodiment of the present invention is a trapezoidal notch.

As shown in fig. 1, the concave structure 301 provided by the present invention includes a first concave wall 3011 located on the transition section 300, a second concave wall 3012 located on the tip section 100, and a third concave wall 3013 located on the root section 200, where the plane of the first concave wall 3011 is parallel to the length direction of the front blade, the second concave wall 3012 extends from the end of the first concave wall 3011 close to the tip section 100 to the end far from the first concave wall 3011 in an inclined manner, and the third concave wall 3013 extends from the end of the first concave wall 3011 close to the root section 200 to the end far from the first concave wall 3011 in an inclined manner, so as to form a trapezoidal gap, so that more wind energy can be blown through the trapezoidal gap, and the rear wind wheel can absorb more wind energy.

It should be noted that, an included angle between the plane where the first concave wall 3011 is located and the plane where the second concave wall 3012 is located and an included angle between the plane where the third concave wall 3013 is located and the plane where the first concave wall 3011 is located cannot be too large, so as to prevent strength insufficiency due to too large included angles, and meanwhile, an included angle between the plane where the first concave wall 3011 is located and the plane where the second concave wall 3012 is located and an included angle between the plane where the third concave wall 3013 is located and the plane where the first concave wall 3011 is located cannot be too small, so as to prevent that an air volume passing through the concave structure 301 is small due to too small included angles, so that an air volume absorbed by the rear blade is reduced, and aerodynamic performance of the rear blade is affected; preferably, an included angle between a plane where the first concave wall 3011 is located and a plane where the second concave wall 3012 is located and an included angle between a plane where the third concave wall 3013 is located and a plane where the first concave wall 3011 is located are both 30 °, which can meet the strength requirement of the front blade and minimize the influence on the aerodynamic performance of the rear blade.

Further, the tip section 100 and the transition section 300 and the root section 200 and the transition section 300 are connected by lap adhesive, so as to combine the tip section 100, the transition section 300 and the root section 200 into a front blade.

It should be noted that the adhesive materials for the tip section 100 and the transition section 300 and the root section 200 and the transition section 300 of the present invention may be epoxy resin, polyurethane, or silicone, and the like, and the present invention is within the protection scope of the present invention as long as the adhesive materials can meet the use requirements; preferably, the embodiments of the present invention use epoxy-based adhesive materials to bond the tip section 100 to the transition section 300 and the root section 200 to the transition section 300.

In addition, in order to improve the precision of lap bonding, two ends of the transition section 300 are provided with positioning structures, and one end of the blade tip section 100 close to the transition section 300 and one end of the blade root section 200 close to the transition section 300 are both provided with matching structures matched with the positioning structures, so that the relative movement of the blade tip section 100 and the transition section 300 and the relative movement of the blade root section 200 and the transition section 300 are limited through the matching of the positioning structures and the matching structures, and the assembly precision of the front blade is improved.

Furthermore, the wind turbine generator with the combined blades further comprises vortex generators arranged on the front blades and the rear blades, so that the power of the front blades and the power of the rear blades are increased, and the power generation capacity of the wind turbine generator with the combined blades is further improved.

The length and the width of the vortex generator on the front blade are not particularly limited, in practical application, the length and the width of the vortex generator on the front blade can be adaptively modified according to actual requirements, and the length and the width which can meet the use requirements belong to the protection scope of the invention; preferably, the width of the vortex generator on the front blade provided by the embodiment of the invention is 0.2-0.3 times of the width of the front blade, and the length of the vortex generator on the front blade is 0.7 times of the length of the front blade.

Similarly, the present invention does not specifically limit the parameters of the vortex generator, such as the length and the width of the rear blade, and in practical applications, the parameters may be adaptively modified according to practical requirements, and any parameter that can meet the use requirements is within the protection scope of the present invention.

In addition, the invention also discloses a manufacturing system of the wind turbine with the combined blades, which is used for manufacturing the wind turbine with the combined blades.

The manufacturing system of the wind turbine with the combined blades comprises a combined die for manufacturing the front blades of the wind turbine with the combined blades, wherein the combined die comprises a first sub die for manufacturing the blade tip section 100 of the front blades, a second sub die for manufacturing the blade root section 200 of the front blades and a third sub die for manufacturing the transition section 300 of the front blades, so that the blade tip section 100 is manufactured through the first sub die, the blade root section 200 is manufactured through the second sub die, and the transition section 300 is manufactured through the third sub die, namely the front blades are assembled together after being poured in a segmented mode, the manufacturing defects of the front blades are reduced through the segmented pouring, and the quality of the front blades is improved.

The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.