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CN-224214294-U - Wind power blade web

CN224214294UCN 224214294 UCN224214294 UCN 224214294UCN-224214294-U

Abstract

The utility model provides a wind power blade web, which comprises a web body, a composite splicing part and a fiber fabric wrapping layer, wherein the web body is formed by at least two prefabricated pultruded glass fiber plates spliced along the length direction of the web body, the composite splicing part is arranged between two adjacent pultruded glass fiber plates to connect the adjacent pultruded glass fiber plates, the splicing part comprises a plurality of pins which are perpendicular to the plate surfaces of the pultruded glass fiber plates and penetrate through the two adjacent pultruded glass fiber plates at the same time, and the fiber fabric wrapping layer covers the outer surfaces of the splicing parts and spans the two adjacent pultruded glass fiber plates. By designing a composite splice comprising pins and an outer fibre coating, webs of different specifications of prefabricated panels are connected with high strength.

Inventors

  • LIU HUAWEI
  • JIN CHENLEI
  • ZHANG TONGLIN

Assignees

  • 上海艾港风电科技发展有限公司
  • 张北艾郎风电科技发展有限公司
  • 南通隆腾测试技术有限公司

Dates

Publication Date
20260508
Application Date
20250709

Claims (6)

  1. 1. A wind turbine blade web, comprising: The web body (1) is formed by at least two prefabricated pultruded glass fiber mats (2) spliced along the length direction of the web body; a composite splice (3) disposed between two adjacent pultruded fibreglass panels (2) for connecting them, the splice (3) comprising: a plurality of pins (4) perpendicular to the faces of the pultruded glass fibre panels (2) and extending through the respective end regions of the adjacent two pultruded glass fibre panels (2), and And a fiber fabric wrapping layer (5) which covers the outer surface of the splicing part (3) and bridges the two adjacent pultruded glass fiber plates (2).
  2. 2. Wind blade web according to claim 1, wherein the web body (1) is in the form of an elongated conical plate structure tapering gradually along its length, the web body (1) comprising a root region (11) of greatest width, a tip region (13) of narrowest width, and a middle region (12) between the root region (11) and the tip region (13).
  3. 3. Wind blade web according to claim 2, wherein the thickness of the pultruded glass fibre panel (2) constituting the root region (11) is greater than the pultruded glass fibre panel (2) constituting the tip region (13).
  4. 4. A wind blade web according to claim 3, characterized in that the upper and lower longitudinal edges of the web body (1) are girder bonding surfaces (14) and that the root area (11) is provided with mounting holes.
  5. 5. Wind blade web according to claim 4, characterized in that at the splice site (3) the ends of the two adjacent pultruded glass fibre panels (2) are arranged opposite each other with a gap left, the plurality of pins (4) being distributed in an array in the end region of the pultruded glass fibre panels (2).
  6. 6. Wind blade web according to claim 5, wherein the fibre fabric wrapping (5) is a band-shaped layer covering the joint of two of the pultruded glass fibre panels (2) and having a width which is larger than the gap between the ends of the pultruded glass fibre panels (2).

Description

Wind power blade web Technical Field The utility model relates to the technical field of wind power blade manufacturing equipment, in particular to a wind power blade web. Background Wind power generation, a form of clean, renewable energy, plays an increasingly important role in global energy structure transformation. The wind power blade is a key core component for converting wind energy into mechanical energy of a wind generating set, and the performance, reliability and manufacturing cost of the wind power blade directly influence the overall economy of wind power. With the continuous development of the wind generating set in the large-scale and light-weight directions, the size of the wind power blade is also increased sharply, and the length of the wind power blade is even more than hundred meters. In such a large structure, the webs that are located inside the blade and connect the spar caps, mainly bear critical shear forces, which are critical to maintaining the stability of the blade cross section and the stiffness of the overall structure. The conventional web manufacturing process, such as on-site hand lay-up or vacuum infusion, is mature in technology, but has the defects of low production efficiency, difficulty in ensuring quality consistency and difficulty in realizing structural optimization when facing to ultra-long blades. To address the challenges presented by large blade manufacturing, industry has begun to explore modular, segmented manufacturing concepts aimed at improving production efficiency and product quality by breaking down large complex components into smaller, more easily manufactured and transported standard modules, which are then spliced in the field. For example, chinese patent application CN115628176a discloses a "sectional girder blade", and the core of the technical scheme is that the girder inside the blade is designed into a plurality of sectional girders sequentially arranged along the span direction of the blade, and correspondingly, the web is also designed into a plurality of sectional webs which are aligned with the sectional girders one by one. The original purpose of this scheme is through the segmentation design for the geometry and the atress characteristics of blade in different positions can be adapted to better to every sectional structure, thereby promote the overall structure efficiency of blade and lighten weight. However, the present inventors have conducted intensive studies on the above prior art, and have found that there is a fundamental, unresolved technical disadvantage in structural design. In particular, this prior art only proposes a conceptual layout of "segmented webs", i.e. a plurality of segmented webs are arranged adjacent to each other in the spanwise direction, but does not give any specific and feasible technical solution throughout the specification for the crucial technical problem of how to connect between these adjacent segmented webs at all. This structural ambiguity leads to the serious technical problem that in practical use the web as a whole has the core function of continuously and effectively transmitting shear forces. If a plurality of segmented webs are simply juxtaposed end-to-end, a natural structural discontinuity will be formed at the seam of adjacent segments. When shear forces need to be transferred from one segment to the next, the forces are severely blocked at this discontinuous joint and an effective mechanical transfer path is not formed. The whole web plate cannot work cooperatively as a whole, extremely large stress concentration can be generated at the edge of the joint, and under the condition that the blade bears alternating load for a long time, cracks are extremely easy to initiate from the weak links and rapidly expand, and catastrophic structural failure is finally caused, so that serious potential safety hazards are formed. Therefore, although the prior art proposes the concept of sectioning, the concept of 'sectioning web' is difficult to realize in engineering due to the defect of the most critical connecting structure, and a safe and reliable integral bearing structure cannot be formed. How to reliably and high-strength connect the sectional webs and ensure the structural integrity of the whole web and the continuity of force transmission is a technical problem to be solved in the field. Disclosure of utility model The utility model aims to provide a wind power blade web plate, which solves the technical problems of discontinuous structure, force transmission interruption and weak strength links caused by an undefined connection mode of a segmented web plate structure in the prior art. In order to achieve the above purpose, the utility model adopts the following technical scheme: A wind power blade web comprises a web body, a composite splicing part and a fiber fabric wrapping layer, wherein the web body is composed of at least two prefabricated pultruded glass fiber plates spliced along the length