A large-size rigid airfoil sail mast structure and its manufacturing method

Abstract

This invention belongs to the field of marine energy conservation technology and discloses a large-size rigid airfoil sail mast structure and its manufacturing method. It includes a central mast, wing sail connectors, and a base connection assembly. A box-shaped structure is formed by the front and rear wing surfaces enclosing the web, effectively increasing the moment of inertia of the central mast section, thereby significantly enhancing its bending and torsional resistance. Both the front and rear wing surfaces adopt a lightweight, high-strength sandwich core structure, significantly reducing weight while ensuring strength and rigidity. Multiple box-shaped substructures are formed by partitions, further improving the overall bending and torsional resistance of the mast and preventing local instability. Wing sail connectors are located at the ends of the partitions away from the web, achieving reliable connection between the left and right wing sails and the central mast. The base connection assembly can be detachably connected to the slewing bearing, optimizing the force transmission path, reducing stress concentration, improving connection reliability, and facilitating assembly, disassembly, and replacement.

Description

Technical Field

[0001] This invention relates to the field of marine energy conservation technology, and in particular to a large-size airfoil sail mast structure and its manufacturing method. Background Technology

[0002] With the increasing demand for green shipping and energy conservation and emission reduction, rigid airfoil sails are gradually becoming the main way for large ocean-going transport ships to utilize wind energy. To obtain greater wind thrust, sail sizes are constantly increasing, placing higher demands on the strength and rigidity of the mast and the load-bearing capacity of the sail tilting mechanism. Existing airfoil sails typically consist of a sail, mast, slewing bearing, and supports. The mast often uses a cylindrical structure with varying thicknesses, and the sail is fixed by welding, bonding, or bolting. However, existing hollow cylindrical steel masts are approaching their structural limits. While thickening the design can improve strength, it results in a heavier sail and significantly increases manufacturing and installation costs.

[0003] Furthermore, due to the large dimensions of sails, they are often manufactured in parts and then assembled on-site after transportation. This requires extensive on-site construction of composite materials, which is challenging due to environmental conditions, resulting in difficult quality control, long construction periods, and high costs. Meanwhile, the mast, as the core load-bearing component, has a limited moment of inertia, leading to low structural utilization and hindering further increases in sail size. Transportation conditions are also a significant factor limiting the size of sails. When the cargo width exceeds 5 meters, conventional road transport is difficult, necessitating the disassembly of large-sized sails for transport and on-site assembly, resulting in difficulties in precision control and high construction costs. Summary of the Invention

[0004] The purpose of this invention is to provide a large-size airfoil sail mast structure and manufacturing method, which improves the degree of integrated sail structure, optimizes the connection between the sail surface and the mast, reduces sail weight, simplifies the connection between the mast and the base, reduces the connection stress between the sail and the slewing bearing, and reduces the difficulty of manufacturing and transporting the sail body.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A large-size rigid airfoil sail mast structure includes:

[0007] The central mast includes a front wing, a rear wing, a web, and bulkheads. The front and rear wing face each other and extend longitudinally, and both are made of lightweight, high-strength materials forming a sandwich core. The web is arranged longitudinally between the front and rear wing face, and the web, together with the front and rear wing face, forms a box-like structure. Multiple bulkheads are spaced longitudinally, and each bulkhead is arranged laterally and connected to the inner surface of the front wing face, the inner surface of the rear wing face, and the outer surface of the web.

[0008] A wing sail connector is installed at the end of the partition away from the web plate, and is used to be detachably connected to the left wing sail or the right wing sail respectively.

[0009] A base connection assembly is installed at the root region of the front and rear wing surfaces for detachable connection with the slewing bearing.

[0010] In some alternative embodiments, the front wing includes a first outer surface layer, a first core layer, and a first inner surface layer, which are bonded together in sequence; the rear wing includes a second outer surface layer, a second core layer, and a second inner surface layer, which are bonded together in sequence; wherein the first outer surface layer, the first inner surface layer, the second outer surface layer, and the second inner surface layer are all made of glass fiber material.

[0011] In some alternative embodiments, a first root reinforcement layer is bonded to the root of the first inner surface layer; and a second root reinforcement layer is bonded to the root of the second inner surface layer.

[0012] In some alternative embodiments, the first core layer includes a first reinforcing core felt, a first core material, and a first pultruded plate, which are bonded together in sequence; the second core layer includes a second reinforcing core felt, a second core material, and a second pultruded plate, which are bonded together in sequence.

[0013] In some alternative embodiments, both the first core material and the second core material are made of polyvinyl chloride or polyethylene terephthalate.

[0014] In some alternative embodiments, a plurality of the base connection assemblies are arranged side by side in the transverse direction at the root regions of the front wing and the rear wing.

[0015] In some alternative embodiments, the base connection assembly includes a bolt sleeve and a double-ended bolt. The bolt sleeve is embedded in the root area of ​​the front wing and the rear wing, and the double-ended bolt passes through the bolt sleeve to detachably connect the front wing to the slewing bearing and the rear wing to the slewing bearing.

[0016] In some alternative embodiments, the wing sail connector includes a quick-release pin, and the end of the partition away from the web has a wing sail connection hole in the transverse direction. The quick-release pin is fixedly installed on the left wing sail or the right wing sail and can be fixedly inserted into the wing sail connection hole.

[0017] In some alternative embodiments, a manhole is provided on the partition.

[0018] A method for manufacturing a large-size rigid airfoil sail mast, used to manufacture a large-size rigid airfoil sail mast structure as described in any of the above, comprising the following steps:

[0019] S1: The rear wing surface of the sandwich core layer is made of lightweight and high-strength material, and the base connecting assembly is installed at its root for injection curing, demolding and surface cleaning;

[0020] S2: Fabricate the web plate and the partition plate, and perform injection curing, demolding and surface cleaning respectively;

[0021] S3: The front wing surface of the sandwich core layer is made of lightweight and high-strength material, and the base connecting assembly is installed at its root; after injection curing, the inner surface of the front wing surface is cleaned.

[0022] S4: The web plates are longitudinally bonded to the inner surface of the front wing, with the web plates arranged opposite to each other;

[0023] S5: The multiple partitions are arranged longitudinally at intervals, and each partition is arranged transversely and bonded to the outer side of the web and the inner surface of the front wing.

[0024] S6: Adhere the inner surface of the rear wing to the web and the partition;

[0025] S7: After the rear wing surface is bonded and cured, it is demolded and polished.

[0026] S8: Install the wing sail connector at the end of the partition away from the web.

[0027] The beneficial effects of this invention are:

[0028] This invention provides a large-size airfoil sail mast structure and manufacturing method, including a central mast, wing sail connectors, and base connection assemblies. The front and rear wing surfaces, enclosed by the web, form a box-like structure, effectively increasing the moment of inertia of the central mast section, thus significantly enhancing its bending and torsional resistance to meet the load-bearing requirements of large-size sails. Both the front and rear wing surfaces employ a lightweight, high-strength sandwich structure, significantly reducing weight while ensuring strength and rigidity. Laterally arranged bulkheads firmly connect the front and rear wing surfaces to the web, forming multiple box-like substructures, further improving the overall bending and torsional resistance of the mast and preventing local instability. Wing sail connectors are located at the ends of the bulkheads furthest from the web, ensuring reliable connection between the left and right wing sails and the central mast. Base connection assemblies are located at the root areas of the front and rear wing surfaces, enabling detachable connection with the slewing bearing, optimizing the force transmission path, reducing stress concentration, improving connection reliability, and facilitating assembly, disassembly, and replacement. Therefore, by combining integrated and modular design, not only has significant weight reduction been achieved, simplifying on-site assembly procedures and improving transportation convenience and manufacturing efficiency, but it has also broken through the structural limitations of traditional cylindrical masts and can effectively support large-size rigid sails. Attached Figure Description

[0029] Figure 1 This is a top view of the central mast structure in this invention;

[0030] Figure 2 This is a left view of the central mast structure in this invention;

[0031] Figure 3 This is a schematic diagram of the root structure of the central mast in this invention.

[0032] In the picture:

[0033] 1. Central mast; 11. Forward wing surface; 111. First outer surface layer; 112. First core layer; 1121. First reinforcing core felt; 1122. First core material; 1123. First pultruded plate; 113. First inner surface layer; 114. First root reinforcement layer; 12. Rear wing surface; 121. Second outer surface layer; 122. Second core layer; 123. Second inner surface layer; 124. Second root reinforcement layer; 13. Web plate; 14. Partition plate;

[0034] 2. Wing sail connector;

[0035] 3. Base connecting assembly; 31. Bolt sleeve; 32. Double-ended bolt. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0040] Please refer to Figures 1 to 3 As shown, this embodiment provides a large-size rigid airfoil sail mast structure, including a central mast 1, a wing-sail connector 2, and a base connection assembly 3. The central mast 1 includes a front wing surface 11, a rear wing surface 12, a web 13, and a bulkhead 14. The front wing surface 11 and the rear wing surface 12 are opposite each other and extend longitudinally, both using lightweight, high-strength materials to form a sandwich core layer. The web 13 is arranged longitudinally between the front wing surface 11 and the rear wing surface 12, and the opposing web 13 and the... The front wing surface 11 and the rear wing surface 12 together form a box-shaped structure; multiple partitions 14 are arranged longitudinally at intervals, and each partition 14 is arranged laterally and connected to the inner surface of the front wing surface 11, the inner surface of the rear wing surface 12 and the outer surface of the web plate 13; the wing sail connector 2 is installed at the end of the partition 14 away from the web plate 13, and is used to detachably connect to the left wing sail and the right wing sail respectively; the base connecting assembly 3 is installed in the root area of ​​the front wing surface 11 or the rear wing surface 12, and is used to detachably connect to the slewing bearing.

[0041] The box-shaped structure formed by the front wing 11, rear wing 12, and web 13 effectively increases the moment of inertia of the central mast 1, thereby significantly enhancing its bending and torsional resistance to meet the load-bearing requirements of large-sized sails. Both the front wing 11 and rear wing 12 adopt a lightweight, high-strength sandwich core structure, significantly reducing weight while ensuring strength and rigidity. The bulkhead 14 is arranged laterally, firmly connecting the front wing 11, rear wing 12, and web 13 to form multiple box-shaped substructures, further improving the overall bending and torsional resistance of the mast and preventing local instability. The end of the bulkhead 14 away from the web 13 is equipped with a wing sail connector 2, which is used to reliably connect the left and right wing sails to the central mast 1. During transportation, the left and right wing sails and the central mast 1 can be transported separately and then spliced ​​on-site, effectively solving the problem of difficult transportation on conventional roads due to the excessive width of the cargo. The root areas of the front wing surface 11 and the rear wing surface 12 are equipped with base connecting components 3, which can be detachably connected to the slewing bearing, optimizing the force transmission path, reducing stress concentration, improving connection reliability, and facilitating assembly, disassembly, and replacement. Thus, this large-size rigid airfoil sail mast, through a combination of integrated and modular design, not only achieves significant weight reduction, simplifies on-site assembly procedures, and improves transportation convenience and manufacturing efficiency, but also overcomes the structural limitations of traditional cylindrical masts, effectively supporting large-size rigid sails.

[0042] like Figure 2 As shown, specifically, the front wing 11 includes a first outer surface layer 111, a first core layer 112, and a first inner surface layer 113, which are bonded together in sequence; the rear wing 12 includes a second outer surface layer 121, a second core layer 122, and a second inner surface layer 123, which are bonded together in sequence; wherein the first outer surface layer 111, the first inner surface layer 113, the second outer surface layer 121, and the second inner surface layer 123 are all made of glass fiber material; the glass fiber layer, as the outer and inner surface layers, mainly bears tensile and compressive stress, which can significantly improve the bending and torsional stiffness and strength of the structure, and is symmetrically arranged on the inner and outer surfaces to ensure balanced stress and avoid warping or local instability caused by material differences; the core layer mainly plays the role of thickening the cross section and improving bending stiffness.

[0043] like Figure 3As shown, more specifically, the first core layer 112 includes a first reinforcing core felt 1121, a first core material 1122, and a first pultruded plate 1123, which are bonded together sequentially; the second core layer 122 includes a second reinforcing core felt, a second core material, and a second pultruded plate, which are bonded together sequentially. The reinforcing core felt can increase the resin content, improve interlayer bonding strength, absorb and disperse stress, and improve impact resistance and fatigue resistance. The core material plays a thickening role, improving bending stiffness. The pultruded plate has high tensile strength and stiffness along the longitudinal direction, can withstand the main direction load, and plays a role in skeleton reinforcement. The reinforcing core felt forms a transition layer between the core material and the surface layer and the pultruded plate, which can improve the interfacial bonding strength and avoid interlayer delamination. The multilayer bonding structure helps to suppress delamination and cracking caused by temperature and humidity changes, improve long-term stability, and the three work together to achieve comprehensive performance of lightweight, high strength and impact resistance. The first pultruded plate 1123 and the second pultruded plate can be, but are not limited to, carbon fiber materials, which are not specifically limited here.

[0044] The first core material 1122 and the second core material are both made of polyvinyl chloride (PVC) or polyethylene terephthalate (PET). PVC and PET materials have low density, which can significantly reduce the overall weight of the mast. At the same time, they have good compressive and shear strength and can withstand the local stress when the load of the sail is transmitted. In addition, both can be well bonded to composite materials such as glass fiber and carbon fiber, and are suitable for various processes such as vacuum infusion, injection, and molding.

[0045] In some alternative embodiments, a first root reinforcement layer 114 is bonded to the root of the first inner surface layer 113; a second root reinforcement layer 124 is bonded to the root of the second inner surface layer 123. By providing the first root reinforcement layer 114 and the second inner surface layer 123 in the root region of the front wing 11 and the rear wing 12, the connection strength between the base connecting assembly 3 and the front wing 11 or the rear wing 12 can be significantly improved, the local load-bearing capacity and anti-peeling performance can be enhanced, and the loosening, detachment or local instability of the base connecting assembly 3 can be effectively avoided, thereby improving the overall reliability and durability of the mast root.

[0046] Optionally, both the first outer surface layer 111 and the second outer surface layer 121 include an airfoil surface mat, a fiberglass woven fabric, and a fiberglass quadriaxial fabric, which are bonded together sequentially. The airfoil surface mat is a flexible layer used to improve surface smoothness, absorb stress concentration, and reduce local impact. The fiberglass woven fabric is used to improve the shear strength in the transverse and longitudinal directions and to disperse stress, making the airfoil more uniformly loaded. The fiberglass quadriaxial fabric consists of fibers distributed in four directions, which significantly improves multi-directional tensile and compressive strength, enhancing the overall stiffness and strength of the airfoil. By setting up a multi-layer composite structure, external forces can be effectively dispersed, local stress concentration can be reduced, and impact resistance can be improved.

[0047] In addition, both the web 13 and the partition 14 include a glass fiber quadriaxial fabric layer, a core material layer and a pultruded plate layer, with the core material layer and the pultruded plate layer sandwiched between the glass fiber quadriaxial fabric layers; this not only significantly improves the bending and torsional resistance in the transverse and longitudinal directions, enhances fatigue life and structural stability, but also maintains lightweight and facilitates the overall manufacturing of large-size masts.

[0048] like Figure 1 As shown, in this embodiment, multiple base connection components 3 are arranged laterally in the root area of ​​the front wing surface 11 and the rear wing surface 12, which can distribute and transfer the wind force and bending moment borne by the central mast 1 to the slewing bearing, avoiding excessive stress at a single point that could cause structural fatigue or damage.

[0049] Specifically, the base connection assembly 3 includes a bolt sleeve 31 and a double-ended bolt 32. The bolt sleeve 31 is embedded in the root area of ​​the front wing 11 and the rear wing 12, and the double-ended bolt 32 passes through the bolt sleeve 31 to detachably connect the front wing 11 to the slewing bearing and the rear wing 12 to the slewing bearing. This facilitates disassembly and assembly during transportation, on-site installation, or maintenance, improving construction and maintenance efficiency. The bolt sleeve 31 is embedded in the root structure of the front wing 11 or the rear wing 12 to form an embedded connection, enhancing the bonding strength between the bolt and the front wing 11 or the rear wing 12. The bolt sleeve 31 distributes the load of the double-ended bolt 32 to the mast root structure, avoiding high stress concentration around the bolt hole, thereby improving structural durability.

[0050] In some embodiments, the wing sail connector 2 includes a quick-connect pin. The end of the partition plate 14 away from the web plate 13 has a wing sail connection hole in the transverse direction. The quick-connect pin is fixedly installed on the left or right wing sail and can be fixedly inserted into the wing sail connection hole. The quick-connect pin can be directly inserted into the connection hole without bolt fixing or complicated tool operation, and can be disassembled or replaced at any time, which facilitates transportation, on-site assembly and maintenance, significantly shortens the installation, disassembly and adjustment time of the left and right wing sails, and improves construction efficiency.

[0051] In some embodiments, a manhole is provided on the partition 14 to facilitate subsequent assembly operations.

[0052] This embodiment also provides a method for manufacturing a large-size rigid airfoil sail mast, used to manufacture the large-size rigid airfoil sail mast structure in any of the above embodiments, including the following steps:

[0053] S1: The rear wing 12 of the sandwich core layer is made of lightweight and high-strength material, and the base connecting component 3 is installed at its root for injection curing, demolding and surface cleaning.

[0054] S2: Fabricate web plate 13 and partition plate 14, and perform injection curing, demolding and surface cleaning respectively;

[0055] S3: The front wing 11 of the sandwich core layer is made of lightweight and high-strength material, and the base connecting component 3 is installed at its root; after pouring and curing, the inner surface of the front wing 11 is cleaned.

[0056] S4: The web plate 13 is bonded longitudinally to the inner surface of the front wing 11, with the web plates 13 arranged opposite each other;

[0057] S5: Multiple partitions 14 are arranged longitudinally at intervals, and each partition 14 is arranged transversely and bonded to the outer side of the web 13 and the inner surface of the front wing 11.

[0058] S6: Attach the inner surface of the rear wing 12 to the web 13 and the septum 14;

[0059] S7: After the rear wing surface 12 is bonded and cured, it is demolded and sanded for correction;

[0060] S8: Install the wing sail connector 2 at the end of the bulkhead 14 away from the web 13.

[0061] By separately molding the front wing 11, rear wing 12, web 13, and bulkhead 14, and then bonding and assembling them, and employing a step-by-step casting, curing, and demolding process, the thickness, surface finish, and geometry of each part can be controlled, thereby improving the overall structural precision of the mast. To address the difficulty of transporting large mast units, a component-based manufacturing and assembly method is adopted, facilitating transportation and on-site assembly. Pre-installing base connection components 3 at the root of the rear wing 12 and front wing 11 improves the reliability of the connection between the mast root and the slewing bearing. The web 13 and bulkhead 14 are bonded together to form multiple box-shaped substructures, significantly enhancing the bending, torsional, and local stability of the central mast 1. A wing sail connector 2 is installed at the end of the bulkhead 14 away from the web 13, enabling detachable connection with the left and right wing sails, facilitating transportation, on-site installation, and maintenance. This manufacturing method ensures the lightweight nature of the central mast 1 while significantly improving strength through box-shaped structures and multi-point connections, meeting the load-bearing requirements of large-size rigid airfoil sails.

[0062] Specifically, the manufacturing method of the front wing 11 includes the following steps: First, a first outer surface layer 111, a first core layer 112, and a first inner surface layer 113 are laid in sequence, wherein the first outer surface layer 111 includes, from the outside to the inside, a surface mat, a fiberglass woven fabric, and a fiberglass quadriaxial fabric; the first core layer 112 includes, in sequence, a first reinforcing core mat 1121, a first core material 1122, and a first pultruded plate 1123; the first inner surface layer 113 is a fiberglass quadriaxial fabric; then, a base connecting assembly 3 is installed at the root of the first inner surface layer 113, and a first root reinforcement layer 114 is bonded; finally, the overall structure is poured, cured, cleaned, and demolded to complete the manufacturing of the front wing 11.

[0063] The manufacturing method of the rear wing 12 includes the following steps: First, the second outer surface layer 121, the second core layer 122, and the second inner surface layer 123 are laid in sequence. The second outer surface layer 121 includes, from the outside to the inside, a surface mat, a fiberglass woven fabric, and a fiberglass quadriaxial fabric. The second core layer 122 includes, in sequence, a second reinforcing core mat, a second core material, and a second pultruded plate. The second inner surface layer 123 is a fiberglass quadriaxial fabric. Then, the base connecting assembly 3 is installed at the root of the second inner surface layer 123, and the second root reinforcement layer 124 is bonded. Finally, the overall structure is poured, cured, cleaned, and demolded, and the wing 12 is then manufactured.

[0064] The fabrication method of the web 13 and partition 14 includes the following steps: First, a layer of glass fiber quadrature cloth is laid, the core material is laid in the central area, and pultruded plates are laid in staggered layers around the perimeter, followed by another layer of glass fiber quadrature cloth; then, the overall structure is poured, cured, cleaned and demolded to complete the fabrication of the web 13 and partition 14.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A large-size rigid airfoil sail mast structure, characterized in that, include: The central mast (1) includes a front wing (11), a rear wing (12), a web (13), and a partition (14). The front wing (11) and the rear wing (12) are opposite each other and extend longitudinally, and are both made of lightweight and high-strength materials to form a sandwich core layer. The web (13) is arranged longitudinally between the front wing (11) and the rear wing (12), and the web (13) arranged opposite to each other, together with the front wing (11) and the rear wing (12), forms a box-shaped structure. A plurality of partitions (14) are arranged longitudinally at intervals, and each partition (14) is arranged laterally and is connected to the inner surface of the front wing (11), the inner surface of the rear wing (12), and the outer surface of the web (13). A wing sail connector (2) is installed at one end of the partition (14) away from the web (13) and is used to detachably connect to the left wing sail or the right wing sail respectively. The base connection assembly (3) is installed at the root region of the front wing (11) and the rear wing (12) for detachable connection with the slewing bearing.

2. The large-size rigid airfoil sail mast structure according to claim 1, characterized in that, The front wing (11) includes a first outer surface layer (111), a first core layer (112), and a first inner surface layer (113), which are bonded together in sequence; the rear wing (12) includes a second outer surface layer (121), a second core layer (122), and a second inner surface layer (123), which are bonded together in sequence; wherein the first outer surface layer (111), the first inner surface layer (113), the second outer surface layer (121), and the second inner surface layer (123) are all made of glass fiber material.

3. The large-size rigid airfoil sail mast structure according to claim 2, characterized in that, The first inner surface layer (113) has a first root reinforcement layer (114) bonded to its root; the second inner surface layer (123) has a second root reinforcement layer (124) bonded to its root.

4. The large-size rigid airfoil sail mast structure according to claim 3, characterized in that, The first core layer (112) includes a first reinforcing core felt (1121), a first core material (1122) and a first pultruded plate (1123), which are bonded together in sequence; the second core layer (122) includes a second reinforcing core felt, a second core material and a second pultruded plate, which are bonded together in sequence.

5. The large-size rigid airfoil sail mast structure according to claim 4, characterized in that, Both the first core material (1122) and the second core material are made of polyvinyl chloride or polyethylene terephthalate.

6. The large-size rigid airfoil sail mast structure according to claim 1, characterized in that, Multiple base connection components (3) are arranged side by side in the transverse direction at the root regions of the front wing (11) and the rear wing (12).

7. The large-size rigid airfoil sail mast structure according to claim 6, characterized in that, The base connection assembly (3) includes a bolt sleeve (31) and a double-ended bolt (32). The bolt sleeve (31) is embedded in the root area of ​​the front wing (11) and the rear wing (12). The double-ended bolt (32) passes through the bolt sleeve (31) and is used to detachably connect the front wing (11) to the slewing bearing and the rear wing (12) to the slewing bearing.

8. The large-size rigid airfoil sail mast structure according to any one of claims 1-7, characterized in that, The wing sail connector (2) includes a quick-release pin. The wing sail connection hole is opened laterally at one end of the partition plate (14) away from the web plate (13). The quick-release pin is fixedly installed on the left wing sail or the right wing sail and can be fixedly inserted into the wing sail connection hole.

9. The large-size rigid airfoil sail mast structure according to any one of claims 1-7, characterized in that, A manhole is provided on the partition (14).

10. A method for manufacturing a large-size rigid airfoil sail mast, used to manufacture the large-size rigid airfoil sail mast structure as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: The rear wing (12) of the sandwich core layer is made of lightweight and high-strength material, and the base connecting assembly (3) is installed at its root. The surface is then poured, cured, demolded, and cleaned. S2: Fabricate the web (13) and the partition (14), and perform injection curing, demolding and surface cleaning respectively; S3: The front wing (11) of the sandwich core layer is made of lightweight and high-strength material, and the base connecting assembly (3) is installed at its root; the inner surface of the front wing (11) is cleaned after injection curing; S4: The web plate (13) is bonded longitudinally to the inner surface of the front wing surface (11), and the web plates (13) are arranged opposite to each other; S5: The multiple partitions (14) are arranged longitudinally at intervals, and each partition (14) is arranged transversely and bonded to the outer side of the web (13) and the inner surface of the front wing (11); S6: Adhere the inner surface of the rear wing (12) to the web (13) and the partition (14); S7: After the rear wing surface (12) is bonded and cured, it is demolded and polished. S8: Install the wing sail connector (2) at the end of the partition (14) away from the web (13).

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