阅读说明：本技术 大型风电叶片的灌注系统及灌注方法 (Large wind power blade filling system and method ) 是由 孙元荣 张力赫 叶志昊 董亚波 于 2021-08-30 设计创作，主要内容包括：本发明公开大型风电叶片的灌注系统及灌注方法,所述灌注系统包括位于叶片端部的第一灌注设备和位于叶片中部的第二灌注设备,第一灌注设备上连接一套端部区域灌注管路,第二灌注设备上分别连接一套最大弦长区域灌注管路和叶尖区域灌注管路；灌注系统还包括预先铺设于风电叶片的基材上的若干导流管,导流管的延伸方向与风电叶片的轴向相适配,导流管的管壁设有若干通孔。本发明的大型风电叶片的灌注方法采用上述灌注系统,对大型风电叶片的三个区域同步进行灌注。本发明灌注系统及灌注方法缩短了大型风电叶片的灌注时间,减少树脂包络情况的发生,提高了良品率,同时通过封闭式灌注将原料与外界空气相隔离,避免环境污染,提高了生产安全性。(The invention discloses a perfusion system and a perfusion method of a large-scale wind power blade, wherein the perfusion system comprises first perfusion equipment positioned at the end part of the blade and second perfusion equipment positioned in the middle part of the blade, the first perfusion equipment is connected with a set of end part region perfusion pipelines, and the second perfusion equipment is respectively connected with a set of maximum chord length region perfusion pipelines and a set of blade tip region perfusion pipelines; the filling system further comprises a plurality of flow guide pipes laid on the base material of the wind power blade in advance, the extending direction of each flow guide pipe is matched with the axial direction of the wind power blade, and the pipe wall of each flow guide pipe is provided with a plurality of through holes. The pouring method of the large-scale wind power blade adopts the pouring system to synchronously pour the three areas of the large-scale wind power blade. The pouring system and the pouring method shorten the pouring time of the large-scale wind power blade, reduce the occurrence of resin enveloping conditions, improve the yield, and simultaneously isolate the raw materials from the outside air through closed pouring, avoid environmental pollution and improve the production safety.)

1. The utility model provides a system of filling of large-scale wind-powered electricity generation blade which characterized in that: the device comprises first pouring equipment positioned at the end part of a blade and second pouring equipment positioned in the middle part of the blade, wherein the first pouring equipment is connected with a set of end part region pouring pipelines, and the second pouring equipment is respectively connected with a set of maximum chord length region pouring pipelines and a set of tip region pouring pipelines; the filling system further comprises a plurality of guide pipes paved on the base material of the wind power blade in advance, the extending direction of each guide pipe is matched with the axial direction of the wind power blade, a plurality of through holes are formed in the pipe wall of each guide pipe, and the end part area filling pipeline and the maximum chord length area filling pipeline and the apex area filling pipeline are both communicated with the guide pipes.

2. The irrigation system for large wind blades according to claim 1, wherein: the end part area filling pipeline comprises a first main pipe, one end of the first main pipe is communicated with the main body of the first filling equipment, a plurality of first branch pipes are arranged on the first main pipe, outlets of the first branch pipes are discharge ports of the first filling equipment, and the discharge ports are communicated with the pipe wall of the flow guide pipe; the arrangement direction of the first branch pipes is consistent with the chord length direction of the wind power blades, and the extension direction of the first branch pipes is consistent with the axial extension direction of the wind power blades.

3. The irrigation system for large wind blades according to claim 2, wherein: the filling pipeline in the area with the maximum chord length comprises a second main pipe, one end of the second main pipe is communicated with the main body of second filling equipment, a plurality of second branch pipes are arranged on the second main pipe, outlets of the second branch pipes are a group of discharge holes of the second filling equipment, and the discharge holes are communicated with the pipe wall of the flow guide pipe; the arrangement direction of the second branch pipes is the same as the maximum chord length direction of the wind power blades, and the extension direction of the second branch pipes is the same as the axial extension direction of the wind power blades.

4. The irrigation system for large wind blades according to claim 3, wherein: the tip region filling pipeline comprises a third main pipe, one end of the third main pipe is communicated with the main body of the second filling equipment, a plurality of third branch pipes are arranged on the third main pipe, outlets of the third branch pipes are another group of discharge holes of the second filling equipment, and the discharge holes are communicated with the guide pipes laid on the blade molds; the arrangement direction of the third branch pipe is consistent with the axial extension direction of the wind power blade.

5. The irrigation system for large wind blades according to claim 4, wherein: and buffer bags are arranged at the discharge outlets of the first branch pipe, the second branch pipe and the third branch pipe.

6. The irrigation system for large wind blades according to claim 5, wherein: and spherical valves are respectively arranged on the first main pipe, the second main pipe and the third main pipe.

7. The irrigation system for large wind blades according to claim 6, wherein: a vacuum film layer is laid above the flow guide pipe and covers the whole surface of the base layer; the perfusion system further comprises a group of vacuum-pumping pumps, and the exhaust pipes of the vacuum-pumping pumps are arranged below the vacuum film layers.

8. A method for pouring large-scale wind power blades, which is characterized by adopting the pouring system of large-scale wind power blades in claim 7, and comprises the following steps:

step 1: laying a main material on a blade mould, wherein the main material sequentially comprises a first glass fiber layer, a core material, a second glass fiber layer and a matrix;

step 2: laying auxiliary materials on the main material, wherein the auxiliary materials sequentially comprise a porous isolating membrane, a flow guide net, a protective net pad, a plurality of flow guide pipes arranged on the protective net pad and a vacuum film layer from bottom to top;

and step 3: erecting a first fixed support and a second fixed support above the end part and the maximum chord length area of the blade mould respectively, wherein the first fixed support and the second fixed support both span across the front edge and the rear edge of the blade mould; the first main pipe is fixed on a first fixed support above the end part, and the first branch pipes are in one-to-one correspondence with and connected with the flow guide pipe; the second main pipe is fixed on a second fixed support above the maximum chord length region, and the second branch pipes are in one-to-one correspondence with and connected with the flow guide pipe;

and 4, step 4: erecting a third fixed support between the maximum chord length region of the blade mold and the blade tip, wherein the extension direction of the third fixed support is axially matched with the blade, the third main pipe is fixed on the third fixed support, and the third branch pipes are in one-to-one correspondence with and connected with the draft tubes;

and 5: extracting an atmospheric pressure between the blade mould and the vacuum film layer to form a negative pressure space;

step 6: according to the presetting of the wind power blade structure, attaching a glue resisting strip at the edge of the area with the largest thickness;

and 7: starting the first pouring equipment and the second pouring equipment of the pouring system, setting the pouring speed to be 30-35kg/min, and beginning to pour resin;

and 8: and after the pouring, curing and receiving, cleaning the auxiliary materials, adhering the windward side, the leeward side and the web plate, lifting and demolding.

Technical Field

The invention relates to a filling system and a filling method, in particular to a filling system and a filling method for a large-scale wind power blade.

Background

The wind power blade on the wind power generation equipment is called as a medium blade with the axial length of about 50-70m, and the flow rate of a pouring rubber mixing machine for pouring the blade is generally 10-20 kg/min. The wind power blade larger than 70m is called a large wind power blade, the dosage of the blade is more than 2000kg when resin of one surface is poured, the operation is directly carried out by adopting medium-sized blade pouring equipment and a pouring method, the pouring time of one surface is about 3 hours, and the pouring risk is increased along with the lengthening of the pouring time due to the extremely long pouring time. For example, as the infusion time increases, the resin begins to polymerize and the viscosity gradually increases, making infusion flow difficult, even if it cures directly during infusion, and the uncured areas are dry glass fibers. Moreover, in the process of pouring, due to the limitation of the quality of auxiliary materials of the vacuum system, the performance of the auxiliary materials can only bear negative pressure for about 2 hours, and as the pouring time is prolonged, the conventional auxiliary materials are likely to leak air due to the fact that the auxiliary materials cannot bear negative pressure for too long time, and finally the pouring failure or the defective rate is increased.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a system and a method for filling a large-scale wind power blade.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a system of filling of large-scale wind-powered electricity generation blade which characterized in that: the device comprises first pouring equipment positioned at the end part of a blade and second pouring equipment positioned in the middle part of the blade, wherein the first pouring equipment is connected with a set of end part region pouring pipelines, and the second pouring equipment is respectively connected with a set of maximum chord length region pouring pipelines and a set of tip region pouring pipelines; the filling system further comprises a plurality of guide pipes paved on the base material of the wind power blade in advance, the extending direction of each guide pipe is matched with the axial direction of the wind power blade, a plurality of through holes are formed in the pipe wall of each guide pipe, and the end part area filling pipeline and the maximum chord length area filling pipeline and the apex area filling pipeline are both communicated with the guide pipes.

Preferably, the end region filling pipeline includes a first main pipe, one end of the first main pipe is communicated with the main body of the first filling device, the first main pipe is provided with a plurality of first branch pipes, outlets of the first branch pipes are discharge ports of the first filling device, and the discharge ports are communicated with the pipe wall of the flow guide pipe; the arrangement direction of the first branch pipes is consistent with the chord length direction of the wind power blades, and the extension direction of the first branch pipes is consistent with the axial extension direction of the wind power blades.

Preferably, the perfusion pipeline in the region with the maximum chord length comprises a second main pipe, one end of the second main pipe is communicated with a main body of the second perfusion equipment, a plurality of second branch pipes are arranged on the second main pipe, outlets of the second branch pipes are a group of discharge holes of the second perfusion equipment, and the discharge holes are communicated with the pipe wall of the flow guide pipe; the arrangement direction of the second branch pipes is the same as the maximum chord length direction of the wind power blades, and the extension direction of the second branch pipes is the same as the axial extension direction of the wind power blades.

Preferably, the tip region perfusion pipeline includes a third main pipe, one end of the third main pipe is communicated with the main body of the second perfusion apparatus, the third main pipe is provided with a plurality of third branch pipes, outlets of the third branch pipes are another group of discharge ports of the second perfusion apparatus, and the discharge ports are communicated with the guide pipes laid on the blade molds; the arrangement direction of the third branch pipe is consistent with the axial extension direction of the wind power blade.

Preferably, the discharge ports of the first branch pipe, the second branch pipe and the third branch pipe are provided with buffer bags.

Preferably, ball valves are respectively arranged on the first main pipe, the second main pipe and the third main pipe.

Preferably, a vacuum film layer is laid above the flow guide pipe and covers the whole surface of the base layer; the perfusion system further comprises a group of vacuum-pumping pumps, and the exhaust pipes of the vacuum-pumping pumps are arranged below the vacuum film layers.

The invention also provides a method for pouring the large-scale wind power blade, which is characterized by comprising any one of the pouring systems of the large-scale wind power blade, wherein the pouring method comprises the following steps:

step 1: laying a main material on a blade mould, wherein the main material sequentially comprises a first glass fiber layer, a core material, a second glass fiber layer and a matrix;

step 2: laying auxiliary materials on the main material, wherein the auxiliary materials sequentially comprise a porous isolating membrane, a flow guide net, a protective net pad, a plurality of flow guide pipes arranged on the protective net pad and a vacuum film layer from bottom to top;

and step 3: erecting a first fixed support and a second fixed support above the end part and the maximum chord length area of the blade mould respectively, wherein the first fixed support and the second fixed support both span across the front edge and the rear edge of the blade mould; the first main pipe is fixed on a first fixed support above the end part, and the first branch pipes are in one-to-one correspondence with and connected with the flow guide pipe; the second main pipe is fixed on a second fixed support above the maximum chord length region, and the second branch pipes are in one-to-one correspondence with and connected with the flow guide pipe;

and 4, step 4: erecting a third fixed support between the maximum chord length region of the blade mold and the blade tip, wherein the extension direction of the third fixed support is axially matched with the blade, the third main pipe is fixed on the third fixed support, and the third branch pipes are in one-to-one correspondence with and connected with the draft tubes;

and 5: extracting an atmospheric pressure between the blade mould and the vacuum film layer to form a negative pressure space;

step 6: according to the presetting of the wind power blade structure, attaching a glue resisting strip at the edge of the area with the largest thickness;

and 7: starting the first pouring equipment and the second pouring equipment of the pouring system, setting the pouring speed to be 30-35kg/min, and beginning to pour resin;

and 8: and after the pouring, curing and receiving, cleaning the auxiliary materials, adhering the windward side, the leeward side and the web plate, lifting and demolding.

The technical scheme can obtain the following beneficial effects: according to the filling system and the filling method for the large-scale wind power blade, the blade is divided into three areas along the axial direction in the filling process, the filling time of the large-scale wind power blade is shortened through simultaneous filling, the occurrence of resin envelope conditions is reduced, the yield is improved, meanwhile, the raw materials are isolated from the outside air through closed filling, the environmental pollution is avoided, and the production safety is improved.

Drawings

FIG. 1 is a schematic view of a perfusion system for large wind blades according to a preferred embodiment of the present invention.

Fig. 2 is a schematic view of the vane mold of the embodiment of fig. 1 after a flow guide pipe is laid on the vane mold and connected with a perfusion system.

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

As shown in fig. 1-2, the perfusion system for a large wind turbine blade in this embodiment includes a first perfusion apparatus 100 located at an end of the blade and a second perfusion apparatus 200 located at a middle of the blade, where the first perfusion apparatus 100 is connected to a set of end region perfusion pipelines, and the second perfusion apparatus 200 is connected to a set of maximum chord length region perfusion pipelines and a set of tip region perfusion pipelines, respectively. The first filling device and the second filling device may be commercially available products, and will not be described in detail herein.

The end region filling pipeline comprises a first main pipe 11, one end of the first main pipe 11 is communicated with the main body of the first filling device 100, seven first branch pipes 12 are arranged on the first main pipe 1, outlets 121 of the first branch pipes 12 are discharge ports of the first filling device 100, and the discharge ports are communicated with the pipe wall of the flow guide pipe 300; the arrangement direction of the first branch pipes 12 is consistent with the chord length direction of the wind power blades, and the extension direction is consistent with the axial extension direction of the wind power blades.

The maximum chord length region perfusion pipeline comprises a second main pipe 21, one end of the second main pipe 21 is communicated with the main body of the second perfusion equipment 200, seven second branch pipes 22 are arranged on the second main pipe 21, outlets 221 of the second branch pipes 22 are a group of discharge holes of the second perfusion equipment 200, and the discharge holes are communicated with the pipe wall of the flow guide pipe 300; the arrangement direction of the second branch pipes 22 is the same as the maximum chord length direction of the wind power blades, and the extension direction is the same as the axial extension direction of the wind power blades.

The tip region perfusion pipeline comprises a third main pipe 31, one end of the third main pipe 31 is communicated with the main body of the second perfusion apparatus 200, seven third branch pipes 32 are arranged on the third main pipe 31, an outlet 321 of each third branch pipe 32 is another group of discharge holes of the second perfusion apparatus 200, and the discharge holes are communicated with the guide pipe 300 laid on the blade mold; the arrangement direction of the third branch pipes 32 is consistent with the axial extension direction of the wind power blade, and the third branch pipes 32 are grouped again according to the axial length of the blade tip so as to match the change of the length and chord long distance of the blade tip.

In addition, ball valves 400 are respectively arranged on the main first main pipe 11, the second main pipe 21 and the third main pipe 31, and the first branch pipe 12, the second branch pipe 22 and the third branch pipe 32, and the perfusion flow rates of the corresponding main pipes and branch pipes are controlled through the ball valves 400. Buffer bags are arranged at the discharge openings of the first branch pipe 12, the second branch pipe 22 and the third branch pipe 32.

And a vacuum film layer is laid above the flow guide pipe and covers the surface of the base layer of the whole blade. The perfusion system further comprises a group of vacuum pumps (not shown in the figure), and an exhaust pipe of each vacuum pump is arranged below the vacuum film layer.

The perfusion method is described below, and comprises the following steps:

step 1: and paving a main material on the blade mould, wherein the main material sequentially comprises a first glass fiber layer, a core material, a second glass fiber layer and a matrix.

Step 2: auxiliary materials are laid on the main materials, and the auxiliary materials sequentially comprise a porous isolating membrane, a flow guide net, a protective net pad, a plurality of flow guide pipes 300 arranged on the protective net pad and a vacuum film layer from bottom to top. The perforated separator is used to ensure the efficiency of peeling when peeling the entire auxiliary material and to prevent the remaining auxiliary material from remaining on the main material. The protection net pad is arranged between the flow guide pipe and the main material, and the main material is prevented from being damaged by deformation of the flow guide pipe in the negative pressure and operation processes. And the vacuum film layer is matched with a vacuum pump to keep the blade mould to form negative pressure on the pouring surface, so that the contact of resin, air and personnel is avoided. The extending direction of the flow guide pipe 300 is matched with the axial direction of the wind power blades, and the pipe wall of the flow guide pipe 300 is provided with a plurality of through holes.

And step 3: erecting a first fixed support and a second fixed support above the end part and the maximum chord length area of the blade mould respectively, wherein the first fixed support and the second fixed support both span across the front edge and the rear edge of the blade mould; the first main pipe is fixed on a first fixed support above the end part, and the outlets 121 of the first branch pipes are in one-to-one correspondence with and connected with the interfaces 122 of the draft tube 300 at the root part; the second main pipe is fixed on the second fixed support above the maximum chord length region, and the outlets 221 of the second branch pipes are in one-to-one correspondence with and connected to the interfaces 222 of the flow guide pipe 300 in the maximum chord length region. The number of first branch pipes in the first header pipe may be set according to the chord length of the end of the blade, and similarly, the number of second branch pipes in the second header pipe may be set according to the span of the maximum chord length of the blade. In this embodiment, the number of the first branch pipes is seven, and the number of the second branch pipes is seven.

And 4, step 4: a third fixed support is erected between the maximum chord length region and the blade tip of the blade mold, the extending direction of the third fixed support is matched with the axial direction of the blade, the third main pipe is fixed on the third fixed support, and the outlets 321 of the third branch pipes 32 are in one-to-one correspondence with and connected with the interfaces 322 of the draft tube 300 between the maximum chord length region and the blade tip. Since this region of the blade is narrowed relative to the tip end or the maximum chord length region, the third branch pipes are divided into three groups and arranged along the axial extension direction of the blade.

And 5: extracting an atmospheric pressure between the blade mould and the vacuum film layer to form a negative pressure space;

step 6: according to the presetting of the wind power blade structure, attaching a glue resisting strip at the edge of the area with the largest thickness;

and 7: starting the first and second perfusion devices, setting the perfusion speed to be 30-35kg/min, and beginning to perfuse the resin.

And 8: and after the pouring solidification is received, cleaning the auxiliary materials, adhering windward surfaces, leeward surfaces, webs and other accessories, and then lifting and demoulding.

According to the filling method, the blade is axially divided into three areas in the filling process, the filling time of the large-scale wind power blade is shortened through simultaneous filling, the occurrence of resin envelope conditions is reduced, the yield is improved, meanwhile, the raw materials are isolated from the outside air through closed filling, the environmental pollution is avoided, and the production safety is improved.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.