CN113306185A - Preparation method of PVC foam core material for wind driven generator blade - Google Patents
Preparation method of PVC foam core material for wind driven generator blade Download PDFInfo
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- CN113306185A CN113306185A CN202110582828.2A CN202110582828A CN113306185A CN 113306185 A CN113306185 A CN 113306185A CN 202110582828 A CN202110582828 A CN 202110582828A CN 113306185 A CN113306185 A CN 113306185A
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- core material
- pvc foam
- glass fiber
- fiber cloth
- sanding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a preparation method of a PVC foam core material of a wind driven generator blade, which comprises the following steps: s1) pretreatment of PVC foam boards: cutting the PVC foam substrate according to the process requirements; s2) sanding and gluing of two sides of the core material: sanding two surfaces of the core material, entering a glue spreader after sanding, coating a layer of glue on the surface of the core material, and performing ultraviolet drying on the glued core material by using an ultraviolet dryer; s3) bonding glass fiber cloth: a layer of latticed glass fiber cloth is compounded on the back surface of the core material; the latticed glass fiber cloth covers the surface of the whole core material; s4) punching: punching a hole in the core material, wherein the hole penetrates through the whole core material; s5) dicing: forming criss-cross deep grooves on the surface of the core material opposite to the glass fiber cloth, and cutting the plate into a plurality of blocks; s6) chamfering: and chamfering one side of the cut core material to form a slope structure on one side of the core material. The invention effectively improves the resin filling efficiency.
Description
Technical Field
The invention relates to the technical field of preparation of wind driven generator blade core materials, in particular to a preparation method of a PVC foam core material of a wind driven generator blade.
Background
The blade is a key part of the wind turbine for capturing wind energy, is a wind turbine force source and a main bearing part, and plays a key role in the safe operation of the whole wind turbine. With the development of wind power technology, the capacity of a single machine is increased, the blade is longer and longer, and the influence of the web plate on the performance of the blade is more and more obvious. In addition, the operation process of the wind turbine at the middle and the lower reaches of the wind field can be influenced by the wake field of the wind turbine at the upper reaches, and meanwhile, due to the randomly changed natural atmospheric environment, the stress condition and the motion condition of the wind turbine blades are very complex, so that the good web plate structure is important for the normal and stable operation of the wind turbine blades. The most main structural form of the large wind turbine blade is composed of an upper wing surface, a lower wing surface and a web plate which are made of composite materials, the web plate is mainly composed of a layer and a sandwich material, and the performance and the quality of the sandwich material play an extremely important role in the good and continuous operation of a wind energy system.
Disclosure of Invention
The invention aims to provide a preparation method of a PVC foam core material for a wind driven generator blade, which effectively improves resin filling efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme: a preparation method of a PVC foam core material of a wind driven generator blade comprises the following steps:
s1) pretreatment of PVC foam boards: cutting, cutting and trimming the PVC foam substrate according to the process requirements;
s2) sanding and gluing of two sides of the core material: conveying the cut core material to a sanding machine, sanding the upper surface of the core material, putting the core material into a glue spreader after sanding, coating a layer of glue on the surface of the core material, performing ultraviolet drying on the glued core material by using an ultraviolet dryer, and sanding, gluing and performing ultraviolet drying on the other surface of the core material;
s3) bonding glass fiber cloth: a layer of latticed glass fiber cloth is compounded on the back surface of the core material; the latticed glass fiber cloth covers the surface of the whole core material;
s4) punching: punching holes in the core material, wherein the holes penetrate through the whole core material and are distributed on the core material at equal intervals to form M rows and N columns;
s5) dicing: forming criss-cross deep grooves on the surface of the core material opposite to the glass fiber cloth, and cutting the plate into a plurality of blocks; the deep groove avoids the position of the hole;
s6) chamfering: and chamfering one side of the cut core material to form a slope structure on one side of the core material.
Further, before step S5), shallow grooves are formed on the surface of the core material, the shallow grooves are criss-cross, the width of the shallow grooves is 2-2.5mm, the depth of the shallow grooves is 2-3mm, and the distance between adjacent shallow grooves is 2-3 cm.
Further, the hole diameter punched in the step S4) is 2.5-3.5 mm.
Further, before the step S3), shallow grooves are formed on one surface of the core material, which is bonded with the glass fiber cloth, the shallow grooves are criss-cross, the width of the shallow grooves is 2-2.5mm, the depth of the shallow grooves is 2-3mm, and the distance between adjacent shallow grooves is 2-3 cm.
Further, the shallow groove is cut by adopting a four-edge cutting device.
Further, in the step S5), the depth of the deep groove is 0.7 to 0.9 times of the overall thickness of the core material.
The invention has the beneficial effects that: according to the invention, through the arrangement of the positions and the sizes of the shallow groove and the deep groove, the resin circulation channel in the subsequent resin filling process is increased, so that the resin filling efficiency is effectively improved.
Detailed Description
The technical solution of the present invention will be clearly and completely described by the following detailed description.
Example 1
A preparation method of a PVC foam core material of a wind driven generator blade comprises the following steps:
s1) pretreatment of PVC foam boards: cutting, cutting and trimming the PVC foam substrate according to the process requirements;
s2) sanding and gluing of two sides of the core material: conveying the cut core material to a sanding machine, sanding the upper surface of the core material, putting the core material into a glue spreader after sanding, coating a layer of glue on the surface of the core material, performing ultraviolet drying on the glued core material by using an ultraviolet dryer, and sanding, gluing and performing ultraviolet drying on the other surface of the core material;
s3) bonding glass fiber cloth: a layer of latticed glass fiber cloth is compounded on the back surface of the core material; the latticed glass fiber cloth covers the surface of the whole core material;
s4) punching: punching holes in the core material, wherein the holes penetrate through the whole core material and are distributed on the core material at equal intervals to form M rows and N columns;
s5) dicing: forming criss-cross deep grooves on the surface of the core material opposite to the glass fiber cloth, and cutting the plate into a plurality of blocks; the deep groove avoids the position of the hole;
s6) chamfering: and chamfering one side of the cut core material to form a slope structure on one side of the core material.
The hole diameter of the hole punched in the step S4) is 2.5 mm.
The shallow slot is cut by a four-edge cutting device.
In step S5), the depth of the deep groove is 0.7 times the total thickness of the core material.
Example 2
A preparation method of a PVC foam core material of a wind driven generator blade comprises the following steps:
s1) pretreatment of PVC foam boards: cutting, cutting and trimming the PVC foam substrate according to the process requirements;
s2) sanding and gluing of two sides of the core material: conveying the cut core material to a sanding machine, sanding the upper surface of the core material, putting the core material into a glue spreader after sanding, coating a layer of glue on the surface of the core material, performing ultraviolet drying on the glued core material by using an ultraviolet dryer, and sanding, gluing and performing ultraviolet drying on the other surface of the core material;
s3), shallow grooves are formed in one surface, which is attached to the glass fiber cloth, of the core material, the shallow grooves are criss-cross, the width of each shallow groove is 2-2.5mm, the depth of each shallow groove is 2-3mm, and the distance between every two adjacent shallow grooves is 2-3 cm.
S4) bonding glass fiber cloth: a layer of latticed glass fiber cloth is compounded on the back surface of the core material; the latticed glass fiber cloth covers the surface of the whole core material;
s5) punching: punching holes in the core material, wherein the holes penetrate through the whole core material and are distributed on the core material at equal intervals to form M rows and N columns;
s6), shallow grooves are formed in the surface of the core material before the core material is subjected to shallow groove forming, the shallow grooves are criss-cross, the width of each shallow groove is 2.5mm, the depth of each shallow groove is 2-3mm, and the distance between every two adjacent shallow grooves is 2-3 cm.
S7) dicing: forming criss-cross deep grooves on the surface of the core material opposite to the glass fiber cloth, and cutting the plate into a plurality of blocks; the deep groove avoids the position of the hole;
s8) chamfering: and chamfering one side of the cut core material to form a slope structure on one side of the core material.
The hole diameter punched in step S5) was 3.5 mm.
The shallow slot is cut by a four-edge cutting device.
In step S7), the depth of the deep groove is 0.8 times of the overall thickness of the core material
Example 3
A preparation method of a PVC foam core material of a wind driven generator blade comprises the following steps:
s1) pretreatment of PVC foam boards: cutting, cutting and trimming the PVC foam substrate according to the process requirements;
s2) sanding and gluing of two sides of the core material: conveying the cut core material to a sanding machine, sanding the upper surface of the core material, putting the core material into a glue spreader after sanding, coating a layer of glue on the surface of the core material, performing ultraviolet drying on the glued core material by using an ultraviolet dryer, and sanding, gluing and performing ultraviolet drying on the other surface of the core material;
s3), shallow grooves are formed in the surface, which is attached to the glass fiber cloth, of the core material, the shallow grooves are criss-cross, the width of each shallow groove is 2.5mm, the depth of each shallow groove is 3mm, and the distance between every two adjacent shallow grooves is 3 cm.
S4) bonding glass fiber cloth: a layer of latticed glass fiber cloth is compounded on the back surface of the core material; the latticed glass fiber cloth covers the surface of the whole core material;
s5) punching: punching holes in the core material, wherein the holes penetrate through the whole core material and are distributed on the core material at equal intervals to form M rows and N columns;
s6), shallow grooves are formed in the surface of the core material before the core material is subjected to shallow groove forming, the shallow grooves are criss-cross, the width of each shallow groove is 2.5mm, the depth of each shallow groove is 2-3mm, and the distance between every two adjacent shallow grooves is 2-3 cm.
S7) dicing: forming criss-cross deep grooves on the surface of the core material opposite to the glass fiber cloth, and cutting the plate into a plurality of blocks; the deep groove avoids the position of the hole;
s8) chamfering: and chamfering one side of the cut core material to form a slope structure on one side of the core material.
The hole diameter punched in step S5) was 3 mm.
The shallow slot is cut by a four-edge cutting device.
In step S7), the depth of the deep groove is 0.9 times the thickness of the entire core material.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (6)
1. A preparation method of a PVC foam core material of a wind driven generator blade is characterized by comprising the following steps: the method comprises the following steps:
s1) pretreatment of PVC foam boards: cutting, cutting and trimming the PVC foam substrate according to the process requirements;
s2) sanding and gluing of two sides of the core material: conveying the cut core material to a sanding machine, sanding the upper surface of the core material, putting the core material into a glue spreader after sanding, coating a layer of glue on the surface of the core material, performing ultraviolet drying on the glued core material by using an ultraviolet dryer, and sanding, gluing and performing ultraviolet drying on the other surface of the core material;
s3) bonding glass fiber cloth: a layer of latticed glass fiber cloth is compounded on the back surface of the core material; the latticed glass fiber cloth covers the surface of the whole core material;
s4) punching: punching holes in the core material, wherein the holes penetrate through the whole core material and are distributed on the core material at equal intervals to form M rows and N columns;
s5) dicing: forming criss-cross deep grooves on the surface of the core material opposite to the glass fiber cloth, and cutting the plate into a plurality of blocks; the deep groove avoids the position of the hole;
s6) chamfering: and chamfering one side of the cut core material to form a slope structure on one side of the core material.
2. The preparation method of the PVC foam core material of the wind driven generator blade according to claim 1, is characterized in that: shallow grooves are formed on the surface of the core material before the step S5), the shallow grooves are criss-cross, the width of each shallow groove is 2-2.5mm, the depth of each shallow groove is 2-3mm, and the distance between every two adjacent shallow grooves is 2-3 cm.
3. The preparation method of the PVC foam core material of the wind driven generator blade according to claim 1, is characterized in that: the hole diameter of the hole punched in the step S4) is 2.5-3.5 mm.
4. The preparation method of the PVC foam core material of the wind driven generator blade according to claim 1, is characterized in that: and step S3), shallow grooves are formed on one surface of the core material, which is attached to the glass fiber cloth, the shallow grooves are criss-cross, the width of each shallow groove is 2-2.5mm, the depth of each shallow groove is 2-3mm, and the distance between every two adjacent shallow grooves is 2-3 cm.
5. The preparation method of the PVC foam core material of the wind driven generator blade as claimed in claims 2 and 5, wherein: the shallow slot is cut by four-edge cutting equipment.
6. The preparation method of the PVC foam core material of the wind driven generator blade according to claim 1, is characterized in that: in the step S5), the depth of the deep groove is 0.7 to 0.9 times of the total thickness of the core material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110582828.2A CN113306185A (en) | 2021-05-27 | 2021-05-27 | Preparation method of PVC foam core material for wind driven generator blade |
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|---|---|---|---|
| CN202110582828.2A CN113306185A (en) | 2021-05-27 | 2021-05-27 | Preparation method of PVC foam core material for wind driven generator blade |
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| CN113306185A true CN113306185A (en) | 2021-08-27 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107718598A (en) * | 2017-11-14 | 2018-02-23 | 国电联合动力技术(连云港)有限公司 | A kind of wind generator set blade core and its processing method |
| CN111873595A (en) * | 2020-08-26 | 2020-11-03 | 中复连众(安阳)复合材料有限公司 | Preparation method of foam sandwich composite structure and structure thereof |
| CN112477189A (en) * | 2020-11-20 | 2021-03-12 | 浙江联洋新材料股份有限公司 | Wind power generation blade core material and processing method thereof |
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2021
- 2021-05-27 CN CN202110582828.2A patent/CN113306185A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107718598A (en) * | 2017-11-14 | 2018-02-23 | 国电联合动力技术(连云港)有限公司 | A kind of wind generator set blade core and its processing method |
| CN111873595A (en) * | 2020-08-26 | 2020-11-03 | 中复连众(安阳)复合材料有限公司 | Preparation method of foam sandwich composite structure and structure thereof |
| CN112477189A (en) * | 2020-11-20 | 2021-03-12 | 浙江联洋新材料股份有限公司 | Wind power generation blade core material and processing method thereof |
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Application publication date: 20210827 |