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CN-122014493-A - Self-supporting structural member based on longitudinal bearing framework of retired wind power blade

CN122014493ACN 122014493 ACN122014493 ACN 122014493ACN-122014493-A

Abstract

The invention discloses a self-bearing structural member based on a longitudinal bearing skeleton of a retired wind power blade. The structural member is formed by cutting retired wind power blades and comprises a composite material shell unit formed by blade shells and a longitudinal bearing framework which is positioned inside the shell unit and is arranged continuously along the axial direction, wherein the longitudinal bearing framework at least comprises a spar cap and a shear web. The longitudinal bearing framework and the shell unit form a cooperative stress system through the original composite material structure connecting interface of the wind power blade, so that the structural member realizes self-bearing under the condition of no external bearing frame. By performing optional local structural treatment on the shear web while maintaining continuity of the primary load path of the longitudinal load bearing backbone, engineering suitability of the structural member is improved without compromising overall load bearing performance. The invention fully utilizes the original bearing structure of the retired wind power blade, and provides a feasible engineering technical scheme for structuring and high-value recycling of the retired wind power blade.

Inventors

  • HUANG AOCHENG

Assignees

  • 黄奥成

Dates

Publication Date
20260512
Application Date
20260324

Claims (7)

  1. 1. A self-supporting structural member based on a longitudinal bearing skeleton of a retired wind power blade is characterized by being formed by cutting the retired wind power blade and comprising a composite shell unit, wherein the composite shell unit is formed by a part of a wind power blade shell, the longitudinal bearing skeleton is positioned inside the composite shell unit, is continuously arranged along the axial direction of the structural member and is a part of a primary structure of the wind power blade, the longitudinal bearing skeleton comprises a spar cap, a shearing web is arranged on at least part of an axial section, the longitudinal bearing skeleton and the composite shell unit are integrally connected through an original composite structure connecting interface of the wind power blade, and a synergetically stressed integral structural system is formed, and the structural member can realize self-bearing under the condition of no external bearing frame.
  2. 2. The structural member of claim 1 wherein the longitudinal load-bearing skeleton comprises a pair of spar caps disposed in series in an axial direction and at least one shear web connecting the pair of spar caps.
  3. 3. The structural member of claim 1 or 2 wherein the longitudinal load-bearing skeleton and the composite shell unit cooperate to participate in bending moment, shear force and/or axial force transmission of the structural member to form a shell-skeleton co-acting force system.
  4. 4. A structural member according to any one of claims 1 to 3 wherein the edge regions of the longitudinal load-bearing skeleton allow for partial cutting or fibre damage during the splitting process to form the structural member, but do not cause an overall truncation of the spar caps in the axial direction.
  5. 5. The structural member of any one of claims 1 to 4 wherein the shear web is provided with at least one through-going aperture while maintaining axial continuity to free up space available inside the structural member without disrupting the overall load path continuity of the longitudinal load-bearing skeleton.
  6. 6. The structural member of any one of claims 1 to 4 wherein the shear web is partially removed in a mid-section region of the structural member in the axial direction or is discontinuously disposed in a localized axial section and shear web structures are retained on either side of the mid-section region to maintain the continuity of the overall load path of the longitudinal load bearing framework.
  7. 7. The structural member of any one of claims 1 to 6 wherein the structural member is a linear load bearing structure or a shell type load bearing structure.

Description

Self-supporting structural member based on longitudinal bearing framework of retired wind power blade Technical Field The invention relates to the technical field of structural reuse of retired wind power equipment and remanufacturing of engineering components, in particular to a self-supporting structural component based on a retired wind power blade longitudinal bearing framework. Background Wind blades are typically made of glass fiber reinforced composites or carbon fiber reinforced composites and are typically used as large cantilever members during service. In order to meet the requirement of complex load working conditions in the operation process, a longitudinal bearing framework formed by spar caps and shear webs is axially arranged inside the wind power blade and used for bearing main bending moment, shearing force and axial load. With the large-scale decommissioning of wind power plants, the disposal problem of wind power blades is increasingly prominent. The existing treatment methods mainly comprise crushing, pyrolysis or degradation recovery, and the methods generally damage continuous fibers and primary bearing structures in the composite material, so that the engineering value of the material is difficult to effectively retain. There are also few technical schemes to try to directly use the retired wind power blade as engineering components after cutting, but related schemes often break the continuity of the longitudinal bearing framework inside the blade in the cutting process, so that the cut components are difficult to bear independently, and the cut components are required to depend on external steel trusses, concrete frames or other bearing systems for supporting, thereby increasing engineering complexity and implementation cost. In addition, the longitudinal bearing framework inside the wind power blade bears the structural function and simultaneously influences the engineering suitability of the components. If the internal shear web structure is simply and completely preserved, the space utilization and functional arrangement of the components in engineering applications can be limited, and if the shear web structure is completely removed, the overall rigidity and stability of the components can be weakened. Therefore, on the premise of keeping the continuity of the whole stress path of the longitudinal bearing framework, the self-bearing of the structural member formed by cutting is realized, and the engineering suitability is considered, so that the technical problem to be solved in the field of the structural reuse of the retired wind power blade is urgent. Disclosure of Invention The invention aims to provide a self-bearing structural member based on a longitudinal bearing framework of a retired wind power blade. The original longitudinal bearing framework of the wind power blade is reasonably reserved and utilized, so that the structural member formed by cutting the retired wind power blade can realize self-bearing under the condition of no external bearing framework, and when necessary, the shearing web is subjected to local structural treatment, so that the balance between the structural bearing capacity and the engineering suitability is realized, and the problem that the structural performance and the engineering applicability are difficult to consider in the process of reutilizing the retired wind power blade in the prior art is solved. In order to achieve the above purpose, the invention provides a self-supporting structural member based on a longitudinal bearing skeleton of a retired wind power blade, wherein the structural member is obtained by cutting the retired wind power blade and comprises a shell unit and the longitudinal bearing skeleton. The shell unit is a composite shell structure formed by a part of the retired wind power blade shell. The longitudinal load-bearing skeleton is located inside the shell unit and is arranged continuously along the axial direction of the structural member, is a part of the original structure of the wind power blade, comprises spar caps, and is provided with shear webs in at least part of the axial sections. The longitudinal bearing framework is integrally connected with the shell unit through the original connecting part (3) of the wind power blade, and a collaborative stressed integral structure system is formed, so that the structural member can realize self-bearing under the condition of no external bearing frame. In some embodiments, the longitudinal load-bearing skeleton comprises a pair of spar caps disposed in series in an axial direction, and at least one shear web connecting the pair of spar caps. In some embodiments, the longitudinal load-bearing skeleton and the housing unit cooperate to participate in bending moment, shear force and/or axial force transmission of the structural member, forming a housing-skeleton cooperative stress system. In some embodiments, localized cuts or fiber damage to the edge regions of the long