WO2019169940A1

WO2019169940A1 - Z-pin reinforced composite wind turbine blade and manufacturing method therefor

Info

Publication number: WO2019169940A1
Application number: PCT/CN2018/125131
Authority: WO
Inventors: 刘若鹏; 赵治亚; 唐梦云
Original assignee: 深圳光启尖端技术有限责任公司
Priority date: 2018-03-09
Filing date: 2018-12-29
Publication date: 2019-09-12
Also published as: CN110242510A

Abstract

A Z-pin reinforced composite wind turbine blade and a manufacturing method therefor, the Z-pin reinforced composite wind turbine blade comprises: shells, that are composed of an upper shell and a lower shell. A connection layer is provided at a joint between the upper shell and the lower shell, an upper portion of the connection layer fits an inner side of the upper shell, a lower portion of the connection layer fits an inner side of the lower shell, and a Z-pin for improving the connection strength is embedded between the upper portion of the connection layer and the upper shell, and between the lower portion of the connection layer and the lower shell. The Z-pin reinforced composite wind turbine blade further comprises: a main beam, the main beam and the inner side of the upper shell being fitted to form an upper bonding surface, the main beam and the inner side of the lower shell being fitted to form a lower bonding surface. A Z-pin for improving the connection strength is embedded at a joint of the upper bonding surface and a joint of the lower bonding surface, and two sides of the main beam are also filled with filling foam within the shells.

Description

[Invention name established by ISA according to Rule 37.2] Z-PIN reinforced composite wind power blade and manufacturing method thereof

Technical field

The invention relates to the field of composite material reinforcement technology, in particular to a Z-pin reinforced composite material wind power blade and a manufacturing method thereof.

Background technique

Wind power blades are the key components of energy conversion in wind turbines. They are also the most complex components. The design and manufacture of them are directly related to the efficiency and service life of wind turbines, affecting the performance of the entire system. Wind power blades are more and more widely used because of their advantages of light weight, high strength, designability, good bearing performance and good fatigue performance.

In addition, the prior art also discloses manufacturing processes of different wind power blades. For example, the prior art discloses a Z-pin reinforced composite wind power blade structure and a manufacturing method thereof, which adds an I-shaped shape in the middle of the wind power blades. It is used to connect the upper and lower half blade skins, and the joint is fixed by Z-pin reinforcement. The blade cavity is filled with foam, but in this method, the joint surface of the I-shaped and the upper and lower skins is small. For the longer cavity shell, the position of the I-shaped type is debatable, and it is difficult to achieve balance; the prior art also discloses a Z-pin reinforced composite wind power blade and a manufacturing method thereof, which are implanted into the foam by Z-pin Prefabricated body for connecting the upper and lower half blade skins, the blade cavity is filled with foam, but in this method, when the blade is subjected to an out-of-plane impact, only the upper and lower casings are carried, resulting in poor impact resistance in the thickness direction. And other issues.

In view of the problems in the related art, no effective solution has been proposed yet.

Summary of the invention

In view of the problems in the related art, the present invention provides a Z-pin reinforced composite wind power blade and a manufacturing method thereof, which solves the problem that the upper and lower skins of the existing wind power blade are easy to be delaminated and have poor bending resistance. Low peeling resistance and weak bearing capacity.

The technical solution of the present invention is implemented as follows:

According to one aspect of the invention, a Z-pin reinforced composite wind power blade is provided.

The Z-pin reinforced composite wind power blade comprises: a casing composed of an upper casing and a lower casing, and a connection layer is provided at a joint of the upper casing and the lower casing, and an upper portion and an upper casing of the connection layer The inner side is fitted, the lower part of the connecting layer and the inner side of the lower case are fitted together, and the Z- of the connection strength is implanted between the upper part of the connecting layer and the upper case, and between the lower part of the connecting layer and the lower case. The Z-pin reinforced composite wind power blade further includes: a main beam, the main beam and the inner side of the upper casing are fitted to form an upper joint surface, and the inner side of the main beam and the lower shell are fitted to form a lower joint surface, and the upper joint The joint of the joint surface and the joint of the lower joint surface are implanted with a Z-pin for improving the joint strength, and inside the casing, the sides of the main beam are also filled with a filling foam.

According to an embodiment of the invention, the main beam is an I-shaped main beam or a π-shaped main beam.

According to an embodiment of the present invention, in the case where the main beam is a π-shaped main beam, a plurality of periodically arranged main beams are disposed in the casing, and in each of the two adjacent main beams, one main beam is opposed to Another main beam is formed by rotating 180°.

According to an embodiment of the invention, the Z-pin is a cylindrical short rod.

According to an embodiment of the invention, the implantation direction of the Z-pin between the connection layer and the upper case is perpendicular to the connection face of the connection layer and the upper case, and the Z- between the connection layer and the lower case The implantation direction of the pin is perpendicular to the connection surface of the connection layer and the lower case.

According to an embodiment of the invention, the implantation direction of the Z-pin at the junction of the upper bonding faces is perpendicular to the upper bonding face, and the implantation direction of the Z-pin at the junction of the lower bonding faces is perpendicular to the lower bonding face.

According to another aspect of the present invention, a method of manufacturing a Z-pin reinforced composite wind power blade is provided.

The method for manufacturing the Z-pin reinforced composite wind power blade comprises: step S1, preparing a Z-pin by a pultrusion process, implanting a Z-pin into the foam preform; and step S2, laying a layer on the special mold according to the design The main beam and the connecting layer are laid in the order and the number of layers; in step S3, the upper casing is laid in the upper mold of the wind power blade, and the lower casing is laid in the lower mold of the wind power blade, and then the step S2 is laid. The main beam is placed at a predetermined portion of the lower casing such that the lower surface of the lower edge of the main beam abuts the inner side of the lower casing to form a lower joint surface; and in step S4, after the inner edge of the lower casing is placed, the step S2 is laid. The connecting layer is such that the lower half of the connecting layer abuts the inner side of the lower casing, and the upper half of the connecting layer is located outside the lower casing; in step S5, the prepared foam preform in step S1 is placed to make it the main The lower edge upper surface of the beam, the lower half of the connecting layer and the inner side of the lower casing are attached; in step S6, the Z-pin in the foam preform is implanted into the lower joint surface so as to penetrate the lower edge of the main beam and Lower the joint surface, then remove excess foam and Z-pin, and also bubble The Z-pin in the preform is implanted into the lower half of the connecting layer and the lower casing so as to penetrate the connecting surface of the lower half of the connecting layer and the lower casing; in step S7, foam is injected on both sides of the main beam Foaming material, then aligning the upper mold with the lower mold, so that the inner wall of the upper casing and the upper surface of the upper edge of the main beam are fitted to form an upper joint surface, and the upper half of the connecting layer is closely attached to the upper shell The inner side; step S8, removing the upper mold and the upper casing, and placing the prepared foam preform in step S1 to fit the upper surface of the main beam, the upper half of the connecting layer and the inner side of the upper casing; In step S9, the Z-pin in the foam preform is implanted into the upper joint surface so as to penetrate the upper edge and the upper joint surface of the main beam, and then the excess foam and Z-pin are removed, and the Z in the foam preform is also removed. -pin is implanted into the upper half of the connecting layer and the upper casing so as to penetrate the connecting surface of the upper half of the connecting layer and the upper casing; in step S10, the upper mold is again closed, and the uncured Z- The pin-reinforced composite wind power blade is solidified to obtain a Z-pin reinforced composite wind power blade.

According to an embodiment of the present invention, in steps S6 and S9, the implantation of the Z-pin is performed by using an ultrasonic gun.

Advantageous technical effects of the present invention are:

The invention connects the main beam and the connecting layer with the skin shell through the Z-pin, and the main beam serves as the main bearing structure, and the connecting layer is used for improving the bonding strength of the upper and lower skins, improving the peeling strength, and avoiding the cause. Degumming at the joint between the upper and lower blade shells and the main beam causes structural damage and does not give good performance to the shell. More importantly, Z-pin reinforcement can be designed to be strong, and meets the requirements of wind power blades for light weight and high strength of materials. .

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic cross-sectional view of a Z-pin reinforced composite wind power blade according to an embodiment of the present invention;

2 is a flow chart of a method of fabricating a Z-pin reinforced composite wind power blade in accordance with an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention are within the scope of the present invention.

In accordance with an embodiment of the present invention, a Z-pin reinforced composite wind power blade is provided.

As shown in FIG. 1, a Z-pin reinforced composite wind power blade according to an embodiment of the present invention includes a casing composed of an upper casing 1 and a lower casing 2, and upper casing 1 and lower casing 2 A connection layer 4 is provided at the connection, an upper portion of the connection layer 4 is bonded to the inner side of the upper casing 1, a lower portion of the connection layer 4 is attached to the inner side of the lower casing 2, and an upper portion of the connection layer 4 and the upper casing 1 are attached. Z-pin 5 for improving the joint strength between the lower portion of the connecting layer 4 and the lower casing 2; and the Z-pin 5 reinforced composite wind power blade further includes: the main beam 3, the main beam 3 and the upper shell The inner side of the body 1 is fitted to form an upper bonding surface, and the inner side of the main beam 3 and the lower casing 2 are bonded to form a lower bonding surface, and the joint of the upper bonding surface and the joint of the lower bonding surface are implanted to improve the connection strength. The Z-pin 5, as well as the housing, the sides of the main beam 3 are also filled with a filling foam.

By means of the above technical solution of the invention, the invention connects the main beam and the connecting layer with the skin casing through the Z-pin, the main beam serves as the main bearing structure, and the connecting layer is used to improve the bonding strength of the upper and lower skins. Improve the peeling strength and avoid structural damage caused by degumming of the joint between the upper and lower blade shells and the main beam, and the shell performance cannot be well exerted. More importantly, the Z-pin reinforcement can be designed and satisfied. Wind power blades are required for lightweight and high-strength materials.

In order to better describe the technical solution of the present invention, a detailed description will be made below through specific embodiments.

At present, the existing manufacturing process of the wind power blade includes: filling the foam, but the disadvantage is that the foam bearing capacity is poor; the main beam for the load is increased by the bonding method, but the strength of the bonding surface is far weaker than the shell The strength of the main beam is easy to be layered and debonded; the main beam for loading is added by Z-pin, but the disadvantage is that there is a connection gap between the upper and lower shells. When the blade is stressed, the interface is easy to degumming, resulting in Structural damage. The wind power blade structure provided by the present invention mainly comprises an upper casing 1 and a lower casing 2 of the blade cavity, and a main beam 3 and a connecting layer 4. The upper edge of the main beam 3 is bonded to the inner wall of the upper casing 1 to form an upper joint surface. The lower edge of the main beam 3 is closely attached to the inner wall of the lower casing 2, and the connecting layer 4 is at the gap where the upper and lower blades are connected, the joint of the upper joint surface, the joint of the lower joint surface, and the joint layer 4 are planted. The Z-pin 5 has a pinning bridge, and the vane cavity is filled with filling foam on both sides of the main beam 3, thereby improving the upper and lower casings and the blade and the main beam by the above structure. The strength of the connection between 3, the improvement of interlayer toughness, and the increase in designability.

As shown in FIG. 1 , the Z-pin reinforced composite wind power blade comprises: an upper casing 1 , a lower casing 2 , a main beam 3 , and a connecting layer 4 of the blade cavity, wherein the upper casing 1 and the lower casing 2 The connection portion is provided with a connection layer 4, the upper portion of the connection layer 4 is bonded to the inner side of the upper case 1, the lower portion of the connection layer 4 and the inner side of the lower case 2 are attached, and the upper portion of the connection layer 4 and the upper case 1 are attached. Between the lower portion of the connecting layer 4 and the lower casing 2, a Z-pin 5 for improving the joint strength is implanted; and the casing further includes: a main beam 3, the main beam 3 and the inner side of the upper casing 1 are attached Forming the upper joint surface, the inner side of the main beam 3 and the lower casing 2 are fitted to form a lower joint surface, and the joint of the upper joint surface and the joint of the lower joint surface are implanted with Z-pin 5 for improving joint strength. And in the housing, both sides of the main beam 3 are also filled with a filling foam, wherein the Z-pin 5 is a cylindrical short rod, and the Z-pin 5 is composed of a composite material, for example, according to an embodiment of the present invention For example, the Z-pin 5 is a cylindrical short rod made of a fiber resin, which is used for implanting a paved prepreg to form a three-dimensional reinforcing structure, and is co-solidified. Forming a three-dimensional integral structure, so that when the wind power blade is stressed, the bridge force of the Z-pin 5 to the blade shell and the main beam 3 hinders the crack propagation, and the connecting layer 4 and the upper casing 1 and the lower casing 2 The bridged Z-pin 5 structure can suppress the interlayer peeling well, and the "pinning" effect and self-deformation of the Z-pin 5 can alleviate the damage, thereby improving the joint strength of the upper casing 1 and the lower casing 2. , peel strength and fatigue resistance. Moreover, it will of course be understood that although this embodiment shows that the Z-pin 5 is a composite material, those skilled in the art will appreciate that the Z-pin 5 can be selected according to actual needs, for example, one according to the present invention. In an embodiment, the Z-pin 5 can be a metal material, which is not limited in the present invention.

Further, as shown in FIG. 1, the main beam 3 is an I-shaped main beam, and an upper surface of an upper edge of the I-shaped main beam is fitted to an inner wall of the upper casing 1, and a lower edge of the I-shaped main beam is disposed. The surface is attached to the inner wall of the lower casing 2, and it is of course understood that the main beam 3 can also be selected according to actual needs. For example, according to an embodiment of the present invention, the main beam 3 can also be a π-shaped main beam. The invention is not limited by the present invention.

In addition, in the case where the main beam 3 is a π-shaped main beam, a plurality of periodically arranged main beams 3 are disposed in the casing, and in each of the two adjacent main beams 3, one main beam 3 is opposite to the other The main beam 3 is formed by 180° rotation, thereby forming an enhanced lattice grid by increasing the number of π-shaped main beams and by adjusting the direction of the π-shaped main beam.

According to an embodiment of the present invention, a method of manufacturing a Z-pin reinforced composite wind power blade is also provided.

As shown in FIG. 2, a method for manufacturing a Z-pin reinforced composite wind power blade according to an embodiment of the present invention includes: Step S201, preparing a Z-pin 5 by a pultrusion process, and implanting the Z-pin 5 into the foam preform; Step S203, on the special mold, the main beam 3 and the connection layer 4 are laid according to the designed layup order and the number of layers; in step S205, the upper casing 1 is laid in the upper mold of the wind power blade, and under the wind power blade The lower casing 2 is laid in the mold, and then the main beam 3 laid in step S203 is placed on a predetermined portion of the lower casing 2 such that the lower surface of the lower edge of the main beam 3 abuts against the inner side of the lower casing 2, thereby forming a lower portion. Bonding surface; step S207, placing the connecting layer 4 after the step S203 is laid along the inner edge of the lower casing 2, so that the lower half of the connecting layer 4 is in close contact with the inner side of the lower casing 2, and the upper half of the connecting layer 4 Partially located on the outer side of the lower casing 2; in step S209, the prepared foam preform in step S201 is placed so as to be attached to the upper surface of the lower edge of the main beam 3, the lower half of the connecting layer 4, and the inner side of the lower casing 2. In step S211, the Z-pin 5 in the foam preform is implanted into the lower joint surface so as to penetrate the main joint The lower and lower joint faces of 3, then remove excess foam and Z-pin 5, and also implant the Z-pin 5 in the foam preform into the lower half of the tie layer 4 and the lower casing 2, It penetrates the connecting surface of the lower half of the connecting layer 4 and the lower casing 2; in step S213, the foaming foam is injected on both sides of the main beam 3, and then the upper mold and the lower mold are joined to each other to make the upper casing 1 The inner wall is in contact with the upper surface of the upper edge of the main beam 3 to form an upper joint surface, and the upper half of the connecting layer 4 is in close contact with the inner side of the upper casing 1; in step S215, the upper mold and the upper casing 1 are removed, The foam preform prepared in step S201 is placed so as to be in contact with the upper surface of the main beam 3, the upper half of the connecting layer 4, and the inner side of the upper casing 1; in step S217, the Z-pin in the foam preform is placed. 5 is implanted into the upper joint surface so as to penetrate the upper edge and the upper joint surface of the main beam 3, then remove excess foam and Z-pin 5, and implant the Z-pin 5 in the foam preform into the joint layer 4 The upper half and the upper casing 1 are passed through the connecting surface of the upper half of the connecting layer 4 and the upper casing 1; in step S219, the upper mold is closed again, Said uncured Z-pin 5-reinforced composite wind turbine blades cured to obtain a composite wind turbine blade Z-pin5 enhanced.

In order to better describe the embodiments of the present invention, the detailed description of the embodiments will be described below.

Embodiment 1

In this embodiment, the main beam 3 is an I-shaped main beam, and the manufacturing method includes the following steps:

Step 1: using the advanced pultrusion process to prepare Z-pin 5, the Z-pin 5 is a cylindrical short rod made of fiber resin, and then implanting Z-pin 5 into the machined foam preform 6 by an ultrasonic gun;

Step 2: On the special mold, the I-shaped main beam and the connecting layer 4 of the composite material are laid according to the designed layup order and the number of layers;

Step 3: Laying the upper and lower casings in the upper and lower molds of the blade respectively, and then placing the I-shaped main beam on a predetermined portion of the lower casing 2 so that the lower edge of the lower edge of the I-shaped main beam and the lower shell The inner wall of the body 2 is attached to form a lower joint surface;

Step 4: placing the connecting layer 4 along the inner edge of the lower casing 2 such that the lower half of the connecting layer 4 abuts the inner side of the lower casing 2, and the upper half of the connecting layer 4 is located outside the lower casing 2;

Step 5: placing the prepared foam preform 6 in the first step to fit the upper surface of the lower edge of the I-shaped main beam and the inner side of the lower casing 2;

Step 6: The Z-pin 5 in the foam preform is implanted into the lower joint surface so as to penetrate the lower edge and the lower joint surface of the I-shaped main beam, then remove excess foam and Z-pin 5, and Z- The pin 5 is implanted into the lower half of the connecting layer 4 and the lower casing 2 so as to penetrate the connecting surface of the lower half of the connecting layer 4 and the lower casing 2;

Step 7: inject foam foaming material on both sides of the I-shaped main beam, and then align the upper mold of the blade shell with the lower mold, so that the inner wall of the upper casing 1 is attached to the upper surface of the I-shaped main beam. Forming, forming an upper bonding surface, and affixing the upper half of the connecting layer 4 to the inner side of the upper casing 1;

Step 8: taking the upper casing 1 and placing the prepared foam preform 6 in the first step to fit the upper surface of the I-shaped main beam and the inner side of the upper casing 1;

Step 9: Implant the Z-pin 5 in the foam preform onto the upper joint surface so that it passes through the upper and upper joint faces of the I-shaped main beam, then remove excess foam and Z-pin 5, and the Z-pin 5 Implanting the upper half of the connecting layer 4 and the upper casing 1 so as to penetrate the connecting surface of the upper half of the connecting layer 4 and the upper casing 1;

Step 10: The upper mold is closed again, and the uncured Z-pin 5 reinforced wind power blade is cured to obtain the product.

Embodiment 2:

In the present embodiment, the main beam 3 is a π-shaped main beam, and the manufacturing method includes the following steps:

Step 1: Using an advanced pultrusion process, a Z-pin 5 is prepared, the Z-pin 5 is a cylindrical short rod made of a fiber resin, and the Z-pin 5 is implanted into the machined foam preform by an ultrasonic gun;

Step 2: On the special mold, the π-shaped main beam and the connecting layer 4 of the composite material are laid according to the designed lamination order and the number of layers;

Step 3: Laying the upper and lower casings in the upper and lower molds of the blade respectively, and then placing the π-shaped main beam on the predetermined portion of the lower casing 2 so that the lower surface of the lower edge of the π-shaped main beam is closely attached to the lower surface. The inner wall of the casing 2 forms a lower joint surface;

Step 5: placing the prepared foam preform in the first step to fit the upper surface of the lower edge of the π-shaped main beam and the inner side of the lower casing 2;

Step 6: implant the Z-pin 5 in the foam preform onto the lower joint surface so as to penetrate the lower edge and the lower joint surface of the π-shaped main beam, then remove excess foam and Z-pin 5, and remove Z- The pin 5 is implanted into the lower half of the connecting layer 4 and the lower casing 2 so as to penetrate the connecting surface of the lower half of the connecting layer 4 and the lower casing 2;

Step 7: inject foam foaming material on both sides of the π-shaped main beam, and then align the upper mold of the blade shell with the lower mold, so that the inner wall of the upper casing 1 is attached to the upper surface of the π-shaped main beam. Forming, forming an upper bonding surface and abutting the upper half of the connecting layer 4 against the inner side of the upper casing 1;

Step 8: Remove the upper casing 1 and place the prepared foam preform in the first step to fit the upper surface of the π-shaped main beam and the inner side of the upper casing 1;

Step 9: Implant the Z-pin 5 in the foam preform onto the upper joint surface so as to penetrate the upper edge and the upper joint surface of the π-shaped main beam, then remove the excess foam and Z-pin 5, and the Z-pin 5 Implanting the upper half of the connecting layer 4 and the upper casing 1 so as to penetrate the connecting surface of the upper half of the connecting layer 4 and the upper casing 1;

Embodiment 3:

In the present embodiment, the main beam 3 is a π-shaped main beam, and the number of π-shaped main beams is increased, and an enhanced lattice grid is formed by adjusting the direction of the π-shaped main beam. The manufacturing method includes the following steps:

Step 3: Laying the upper and lower casings in the upper and lower molds of the blade respectively, and then placing a plurality of π-shaped main beams on the predetermined portion of the lower casing 2, so that the lower surface of the lower edge of the π-shaped main beam is tight The inner wall of the casing 2 is attached to form a lower joint surface, and in each of the two adjacent π-shaped main beams, one π-shaped main beam is formed by rotating 180° with respect to the other main π-shaped main beam, thereby passing Interchanging the direction of the π-shaped main beam at intervals to form an enhanced lattice grid;

Step 7: inject foam foaming material on both sides of the π-shaped main beam, and then align the upper mold of the blade shell with the lower mold, so that the inner wall of the upper casing 1 is attached to the upper surface of the π-shaped main beam. Forming, forming an upper bonding surface, and bringing the upper half of the connecting layer 4 against the inner side of the upper casing 1;

In summary, with the above technical solution of the present invention, the main beam and the connecting layer are connected to the skin casing through the Z-pin, and the main beam is used as the main bearing structure, and the connecting layer is used to improve the upper and lower skins. Bond strength, improved peel strength, and avoids structural damage caused by degumming of the joint between the upper and lower blade shells and the main beam, and does not give good performance to the shell. More importantly, Z-pin reinforcement is highly designable. And meet the requirements of wind power blades for light weight and high strength.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

A Z-pin reinforced composite wind power blade, characterized in that the Z-pin reinforced composite wind power blade comprises: a casing composed of an upper casing and a lower casing, and the upper casing a connection layer is provided at a joint with the lower casing, an upper portion of the connection layer is fitted to an inner side of the upper casing, a lower portion of the connection layer is attached to an inner side of the lower casing, and a Z-pin for improving the connection strength is implanted between the upper portion of the connection layer and the upper case, between the lower portion of the connection layer, and the lower case;

The Z-pin reinforced composite wind power blade further includes: a main beam, the main beam and the inner side of the upper casing are fitted to form an upper joint surface, and the inner side of the main beam and the lower shell are fitted Forming a lower bonding surface, and a joint of the upper bonding surface and a joint of the lower bonding surface are implanted with the Z-pin for improving connection strength, and within the housing, the main beam The sides are also filled with a filling foam.
The Z-pin reinforced composite wind power blade according to claim 1, wherein the main beam is an I-shaped main beam or a π-shaped main beam.
The Z-pin reinforced composite wind power blade according to claim 2, wherein in the case where the main beam is the π-shaped main beam, the housing is provided with a plurality of periodically arranged The main beam, and in each of the two adjacent main beams, one of the main beams is formed by rotating 180° with respect to the other one of the main beams.
The Z-pin reinforced composite wind power blade according to claim 1, wherein the Z-pin is a cylindrical short rod.
The Z-pin reinforced composite wind power blade according to claim 1, wherein an implantation direction of a Z-pin between the connection layer and the upper casing is perpendicular to the connection layer and the A joining surface of the upper casing, and an implantation direction of the Z-pin between the connecting layer and the lower casing are perpendicular to a joining surface of the connecting layer and the lower casing.
The Z-pin reinforced composite wind power blade according to claim 1, wherein an implantation direction of the Z-pin at a joint of the upper bonding surface is perpendicular to the upper bonding surface, and the lower bonding surface is located The joint Z-pin is implanted perpendicular to the lower joint surface.
A method for manufacturing a Z-pin reinforced composite wind power blade, comprising:

Step S1, preparing a Z-pin by a pultrusion process, and implanting the Z-pin into the foam preform;

Step S2, on the special mold, the main beam and the connecting layer are laid according to the designed layup order and the number of layers;

Step S3, laying the upper casing in the upper mold of the wind power blade, and laying the lower casing in the lower mold of the wind power blade, and then placing the main beam laid in the step S2 on the lower shell a predetermined portion of the body such that a lower surface of the lower edge of the main beam abuts the inner side of the lower casing to form a lower joint surface;

Step S4, placing the connecting layer covered in the step S2 along the inner edge of the lower casing, so that the lower half of the connecting layer is in close contact with the inner side of the lower casing, the connecting layer The upper half is located outside the lower casing;

Step S5, placing the prepared foam preform in the step S1 to fit the upper surface of the lower edge of the main beam, the lower half of the connecting layer and the inner side of the lower casing;

Step S6, implanting a Z-pin in the foam preform into the lower joint surface so as to penetrate the lower edge and the lower joint surface of the main beam, and then remove excess foam and Z-pin, And implanting a Z-pin in the foam preform into the lower half of the connecting layer and the lower casing so as to penetrate the lower half of the connecting layer and the lower casing Connecting surface

Step S7, injecting foam foam on both sides of the main beam, and then aligning the upper mold with the lower mold, so that the inner wall of the upper casing and the upper surface of the upper edge of the main beam are Laminating, forming an upper bonding surface, and causing an upper half of the connecting layer to abut an inner side of the upper casing;

Step S8, removing the upper mold and the upper casing, and placing the foam preform prepared in the step S1 with the upper surface of the main beam and the upper half of the connecting layer And bonding the inner side of the upper casing;

Step S9, implanting a Z-pin in the foam preform onto the upper joint surface so as to penetrate the upper edge of the main beam and the upper joint surface, and then remove excess foam and Z-pin, Also implanting a Z-pin in the foam preform into the upper half of the connecting layer and the upper casing such that the upper half of the connecting layer is connected to the upper casing surface;

Step S10, the upper mold is closed again, and the uncured Z-pin reinforced composite wind power blade is solidified to obtain the Z-pin reinforced composite wind power blade.
The method for manufacturing a Z-pin reinforced composite wind power blade according to claim 7, wherein in the step S6 and the step S9, the Z-pin is implanted by using an ultrasonic gun. .
The method of manufacturing a Z-pin reinforced composite wind power blade according to claim 7, wherein the Z-pin is a cylindrical short rod.
The method of manufacturing a Z-pin reinforced composite wind power blade according to claim 7, wherein the main beam is an I-shaped main beam or a π-shaped main beam.