Design method of wind power blade web steel platform mold

Abstract

The invention provides a wind power blade web steel platform mold design method which comprises the following steps: S1, welding a baffle plate; s2, filling silica gel; s3, the second baffle is dismantled; s4, layer laying is carried out; s5, filling silica gel; s6, separating surfaces are dismantled; s7, web plate forming; according to the method, a movable flange does not need to be manufactured on a steel platform flange with the main bonding angle of the web being the acute angle area, namely, a mold flange does not need to be dismantled before demolding every time, and the web demolding and forming efficiency can be effectively improved; the web height error formed by dismounting the flange every time is avoided, so that the blade product quality is improved.

Description

Technical Field

[0001] The invention belongs to the field of wind turbine blade manufacturing, and in particular relates to a method for designing a wind turbine blade web steel platform mold. Background Art

[0002] Wind turbine blades are generally composed of upper and lower shells and two webs in the middle. After the upper and lower shells and webs are formed separately, the webs are bonded to one side of the shell using adhesive, and then the upper and lower shells are molded and bonded together to form a wind turbine blade. Among them, the web, as one of the main components of the wind turbine blade, is usually prefabricated separately in the web steel platform mold. The current bonding angles of wind turbine blades are divided into main bonding and auxiliary bonding, and the two are complementary angles to each other. In order to achieve one-time injection molding of main bonding and auxiliary bonding, the web steel platform mold is composed of a steel platform and a steel rib welded together. The width and angle of the steel rib are determined by the design shape of the wind turbine blade. There are obtuse and acute angle areas. The outer bonding area needs to be injected with silicone before the web is made to assist in the molding of the web, web steel platform mold and silicone structure;

[0003] For the area where the web bonding angle is acute, the web steel platform flange needs to be made in a movable manner, that is, the flange is fixed to the steel platform with bolts and nuts. Each time the web is cured and before demoulding, the movable flange in the acute angle area needs to be removed to meet the demoulding requirements, and reinstalled to the specified position before the next support is formed. This process is time-consuming and not conducive to the stability of the web profile, and is prone to web profile deviation due to installation errors, which ultimately affects the quality of the blade. Summary of the invention

[0004] In view of this, the present invention aims to propose a method for designing a steel platform mold for the web of a wind turbine blade, which can achieve the goal that the steel platform ribs in the acute angle area of ​​the web main bonding angle do not need to be made into movable ribs, that is, there is no need to remove the mold ribs before each demolding, which can effectively improve the web demolding and forming efficiency; avoid the web height error caused by each disassembly and assembly of the ribs, thereby improving the blade product quality.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A method for designing a steel platform mold for a wind turbine blade web comprises the following steps:

[0007] S1. Welding baffles: Welding baffle No. 1 and baffle No. 2 on the web steel platform to form a V-shaped area between the baffle No. 1 and baffle No. 2 brackets;

[0008] S2, pouring silica gel: pouring silica gel into the V-shaped area, and after the pouring is completed, heating the silica gel through a heating device until it solidifies to form a No. 1 solid silica gel;

[0009] S3, remove the No. 2 baffle; remove the No. 2 baffle by desoldering; then fix the solid silica gel on the No. 1 baffle according to the axial meter mark by double-sided tape as the profile of the subsequent web layer;

[0010] S4, laying: Lay the web product close to the inner surface of the solid silicone to assist in bonding the corner fabric layer, fix the fabric layer with spray glue, and lay a non-porous isolation film as a separation surface;

[0011] S5, pouring silicone: pouring silicone between the No. 1 silicone and the steel platform mold, the silicone is flush with the steel platform, and is heated and cured by a heating device to form No. 2 solid silicone as an auxiliary component for the web forming;

[0012] S6, remove the partition surface; take out the No. 1 solid silicone, re-lay the auxiliary bonding corner cloth layer between the No. 1 solid silicone and the No. 2 solid silicone, and then place the No. 2 solid silicone to form a web mold between the No. 1 solid silicone and the No. 2 solid silicone;

[0013] S7, belly plate forming, lay out the belly plate product outer skin glass fiber cloth, core material, inner skin glass fiber cloth and injection pressure holding consumables in sequence, inject epoxy resin after vacuum pressure holding is qualified, start the mold heating program after injection is completed, the epoxy resin undergoes cross-linking reaction and solidifies under heat; remove the consumables and demould the belly plate component.

[0014] Furthermore, the No. 1 baffle and the No. 2 baffle are both made of steel; the thickness of the No. 1 baffle and the No. 2 baffle is 6-8mm; the width of the No. 1 baffle and the No. 2 baffle is a, the sum of the main and auxiliary bonding angle widths of the web product is b, and the range in which a is greater than b is 5-10mm.

[0015] Furthermore, the angle formed by the first baffle plate and the surface of the steel platform is an obtuse angle, which is 95°-110°.

[0016] Furthermore, the silica gel needs to be mixed evenly in a barrel before use and then degassed in a vacuum degassing box for 10 minutes; the heating temperature of the heating equipment is adjusted to 70°C-75°C.

[0017] Compared with the prior art, the method for designing a wind turbine blade web steel platform mold according to the present invention has the following advantages:

[0018] The present invention provides a method for designing a steel platform mold for a wind turbine blade web, which can achieve the goal that the steel platform ribs in the acute angle area of ​​the web main bonding angle do not need to be made into movable ribs, that is, there is no need to remove the mold ribs before demolding each time, which can effectively improve the web demolding and forming efficiency; avoid the web height error caused by each disassembly and assembly of the ribs, thereby improving the blade product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of a steel platform mold for a wind turbine blade web according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the web structure described in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. No. 1 side guard; 2. No. 2 side guard; 3. No. 1 solid silicone; 4. No. 2 solid silicone. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0028] A method for designing a steel platform mold for a wind turbine blade web comprises the following steps:

[0029] S1. Welding baffles: Welding baffle No. 1 and baffle No. 2 on the web steel platform to form a V-shaped area between the baffle No. 1 and baffle No. 2 brackets;

[0030] S2, pouring silicone: pouring silicone into the V-shaped area, and after pouring, heating the silicone through a heating device until it solidifies to form a No. 1 solid silicone; the shape and size of the No. 1 solid silicone are the same as the shape and size of the V-shaped space formed between the No. 1 rib and the No. 2 rib,

[0031] S3, remove the No. 2 baffle; remove the No. 2 baffle by desoldering; then fix the solid silica gel on the No. 1 baffle according to the axial meter mark by double-sided tape as the profile of the subsequent web layer;

[0032] S4, laying: Lay the web product close to the inner surface of the solid silicone to assist in bonding the corner fabric layer, fix the fabric layer with spray glue, and lay a non-porous isolation film as a separation surface;

[0033] When the formal web product is produced, it is necessary to first lay the outer bonding angle cloth layer of the web close to its surface after the No. 1 solid silicone is installed. The existence of this cloth layer will affect the size of the No. 1 solid silicone. Therefore, it is necessary to simulate the number of layers of the outer bonding angle cloth layer of the formal product, lay the layer close to the inner surface of the No. 1 solid silicone, and use spray glue to fix the cloth layer, and lay a non-porous isolation membrane as a dividing surface to facilitate the subsequent separation of the No. 2 solid silicone and the cloth layer.

[0034] S5, pouring silicone: pouring silicone between the No. 1 silicone and the steel platform mold, the silicone is flush with the steel platform, and is heated and cured by a heating device (in the solid state, it is not sticky to the touch and the shape is stable) to form No. 2 solid silicone as an auxiliary component for the web forming;

[0035] Before using the silica gel, mix it evenly in the bucket and use a vacuum degassing box to degas for about 10 minutes;

[0036] S6, remove the partition surface; take out the No. 1 solid silicone, re-lay the auxiliary bonding corner cloth layer between the No. 1 silicone and the No. 2 silicone, and then place the No. 2 solid silicone to form a web mold between the No. 1 solid silicone and the No. 2 solid silicone;

[0037] S7, belly plate forming, lay out the belly plate product outer skin glass fiber cloth, core material, inner skin glass fiber cloth and injection pressure holding consumables in sequence, inject epoxy resin after vacuum pressure holding is qualified, start the mold heating program after injection is completed, the epoxy resin undergoes cross-linking reaction and solidifies under heat; remove the consumables and demould the belly plate component.

[0038] Preferably, baffle No. 1 and baffle No. 2 are both made of steel material; the thickness of baffle No. 1 and baffle No. 2 is 8mm; the width of baffle No. 1 and baffle No. 2 is a, the sum of the widths of the main and auxiliary bonding angles of the web product is b, and a is greater than b10mm; the bottom spacing between baffle No. 1 and baffle No. 2 is 0-10mm.

[0039] Preferably, the angle formed by the first baffle plate and the surface of the steel platform is an obtuse angle, which is 95°-110°.

[0040] Preferably, the silica gel needs to be mixed evenly in a barrel before use and then degassed in a vacuum degassing box for 10 minutes; the heating temperature of the heating equipment is adjusted to 70° C.-75° C., and it is not sticky to the touch and has a stable shape.

[0041] Since the web rib is an obtuse angle, the mold can be demoulded normally each time without removing the rib. The No. 1 solid silicone and the No. 2 solid silicone can be reused.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for designing a steel platform mold for a wind turbine blade web, characterized in that: The following steps are involved: S1. Welding baffles: Welding baffle No. 1 and baffle No. 2 on the web steel platform to form a V-shaped area between the baffle No. 1 and baffle No. 2 brackets; S2, pouring silica gel: pouring silica gel into the V-shaped area, and after the pouring is completed, heating the silica gel through a heating device until it solidifies to form a No. 1 solid silica gel; S3, remove the No. 2 baffle; remove the No. 2 baffle by desoldering; then fix the solid silica gel on the No. 1 baffle according to the axial meter mark by double-sided tape as the profile of the subsequent web layer; S4, laying: Lay the web product close to the inner surface of the solid silicone to assist in bonding the corner fabric layer, fix the fabric layer with spray glue, and lay a non-porous isolation film as a separation surface; S5, pouring silicone: pouring silicone between the No. 1 silicone and the steel platform mold, the silicone is flush with the steel platform, and is heated and cured by a heating device to form No. 2 solid silicone as an auxiliary component for the web forming; S6, remove the partition surface; take out the No. 1 solid silicone, re-lay the auxiliary bonding corner cloth layer between the No. 1 solid silicone and the No. 2 solid silicone, and then place the No. 2 solid silicone; form a web mold between the No. 1 solid silicone and the No. 2 solid silicone; S7, belly plate forming, lay out the belly plate product outer skin glass fiber cloth, core material, inner skin glass fiber cloth and injection pressure holding consumables in sequence, inject epoxy resin after vacuum pressure holding is qualified, start the mold heating program after injection is completed, the epoxy resin undergoes cross-linking reaction and solidifies under heat; remove the consumables and demould the belly plate component.

2. A method for designing a steel platform mold for a wind turbine blade web according to claim 1, characterized in that: The No. 1 baffle and the No. 2 baffle are both made of steel; the thickness of the No. 1 baffle and the No. 2 baffle is 6-8mm; the width of the No. 1 baffle and the No. 2 baffle is a, the sum of the main and auxiliary bonding angle widths of the web product is b, and the range in which a is greater than b is 5-10mm.

3. The method for designing a steel platform mold for a wind turbine blade web according to claim 1, characterized in that: The angle formed by the No. 1 baffle plate and the surface of the steel platform is an obtuse angle, which is 95°-110°.

4. The method for designing a steel platform mold for a wind turbine blade web according to claim 1, characterized in that: Before use, the silica gel needs to be mixed evenly in a barrel and then degassed in a vacuum degassing box for 10 minutes; the heating temperature of the heating equipment is adjusted to 70°C-75°C.

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