A method for reinforcing the root of an ultra-large wind power negative mold

Abstract

The application discloses a reinforcing method for the root of a super-large wind power negative mold, which comprises the following steps: installing a circular pipe, installing an adjuster, connecting a rectangular pipe and the circular pipe, manually pasting a side flange and the circular pipe, manually pasting a rectangular pipe and a main surface of a blade mold, and integrating; the position of the circular pipe is adjusted through the support adjuster to control the overall height of the rectangular pipe, then fiber cloth is uniformly laid on the surfaces of the rectangular pipe and the circular pipe, and the fiber cloth is poured with resin and solidified, so that the strength and stability of the overall structure are guaranteed; the end surface of the adjuster is abutted against the end surface vertical surface of the blade mold on one side of the steel structure at the root of the blade mold, so that the strength of the intersection point between the end surface at the root of the blade mold and the parting line is increased, the stress at the intersection point is dispersed, and the precision requirement of the blade production is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind turbine blade mold, in particular to a reinforcing method for the root of a large wind power negative mold. BACKGROUND

[0002] As a clean and renewable energy, wind energy is increasingly valued by countries around the world. Its potential is huge, global wind energy is about 2.74×109MW, of which the available wind energy is 2×107MW, 10 times larger than the total amount of water energy developed on earth. Wind has been used by people for a long time, mainly through windmills to pump water, grinding and other purposes. Now, people are interested in how to use wind to generate electricity. The principle of wind power generation is to use wind to drive windmill blades to rotate, and then use speed increasers to increase the speed of rotation to promote the generation of electricity. According to the current wind power generation technology, about three meters per second of wind speed can start power generation. Wind power generation is forming a hot trend in the world because wind power generation has no fuel problem and does not produce radiation or air pollution.

[0003] With the vigorous development of wind power generation, wind turbine blades are continuously transported to wind farms around the world by manufacturers. When large wind power molds are used to make blades, the larger the diameter of the blade root, the greater the deformation of the mold gap. Especially at the intersection of the root end face and the parting line, the local deformation of the root mold surface is caused by the heating and temperature rise of the manufactured blade and the demolding tension of the blade, thereby causing the subsequent blade manufacturing data to gradually become distorted.

[0004] In order to meet the needs of the market and speed up the production progress, the prior art also discloses some ways for reinforcing the root of the mold. For example, Chinese patent CN 202462714 U discloses a size-adjustable preparation mold for wind power blades, which comprises: a wind turbine blade negative mold shell, a steel reinforcing rib embedded on the back of the wind turbine blade negative mold shell, a glass steel paste on the lower surface of the wind turbine blade negative mold shell for reinforcing the steel reinforcing rib, a steel frame supporting the wind turbine blade negative mold shell, and a telescopic adjustable support welded between the steel reinforcing rib and the steel frame. The gap between the detection card and the wind turbine blade negative mold shell is adjusted by using the telescopic adjustable support until the control tolerance is within the manufacturing requirement range, and the operation is very convenient. However, in actual application, size adjustment in the same dimension cannot well control the overall structure, and the size of the product may remain limited in a certain dimension, but may deform in other dimensions. Such structure and use method will cause many uncertain factors and unexpected conditions for the product, and the working state is unstable.

[0005] In order to solve the stability of the blade root connection, there are some structures in the prior art that reinforce the blade root through other components, for example, the patent for utility model CN217950599U discloses a wind turbine blade root deformation prevention reinforcing assembly, which comprises a fixing frame, a driving motor, a buffer reinforcing mechanism is arranged on the left side of the fixing frame, a reinforcing ring is movably connected between the right end of the reinforcing disc inside the reinforcing disc and the right side of the wind turbine blade, the reinforcing disc is movably connected with the right side of the flange disc through the limiting ring on the left side, the left side of the driving motor is movably connected with the driving gear, and the rotating shaft is drivingly installed in the middle of the driving gear. Through the structure, the wind turbine blade root is reinforced, the limiting ring in the reinforcing disc is movably connected with the right side of the flange disc, the driving gear drives the rotating shaft to rotate, the flange disc plays a role of buffering and reinforcing the wind turbine blade, the fastening limiting column reinforces the blade root part of the wind turbine blade through a plurality of threaded columns, and the stability of the wind turbine blade in rotation is improved. However, the structure is complex, the cost is high, and the structure belongs to a rescue measure after the wind turbine blade is deformed, and cannot fundamentally solve the problem of the stability of the wind turbine negative mold root connection. SUMMARY

[0006] The purpose of the present application is to solve the problems of the prior art, provide a super large wind turbine negative mold root reinforcing method, and through the innovation of the negative mold root reinforcing structure, increase the strength of the intersection point of the blade mold root end face and the parting line, and disperse the stress at the intersection point, so as to achieve the effect of no deformation or deformation within the allowable tolerance range, thereby ensuring the precision requirement of the blade production.

[0007] Technical scheme: In order to achieve the above purpose, the super large wind turbine negative mold root reinforcing method comprises the following specific steps:

[0008] Step one, fix two support adjusters on the inner sides of two blade mold root steel structures, install the two ends of the circular pipe on the support adjusters, and obtain the blade mold main surface on the upper surfaces of the plurality of circular pipes by the hand lay-up resin method, the thickness of the blade mold main surface obtained by the hand lay-up resin is twice the value of the blade mold end face riser, and the thickness of the part from the connection to the outer edge of the riser decreases gradually;

[0009] Step two, fix the end face adjuster on the end face of the blade mold root steel structure;

[0010] Step three, fix the end surfaces of the rectangular pipe and the plurality of circular pipes by welding, riveting, threaded connection or other fixed connection methods;

[0011] Step four, the two ends of the side flange are fixed on the top of the steel structure of the root of the adjacent two blade molds, the filling layer provided between the side flange and the circular tube is used to fix the axial surface of the circular tube and the side flange, and then the fiber fabric is laid on the outer surface of the side flange and the circular tube by hand laying;

[0012] Step five, the filling layer between the rectangular tube and the main surface of the blade mold is used to fix the rectangular tube and the main surface of the blade mold, the end face adjuster is adjusted and abuts against the end face vertical surface of the blade mold, and the fiber fabric and the pouring resin are laid on the surface of the rectangular tube and the end face adjuster and are cured;

[0013] Step six, the main surface of the blade mold, the end face vertical surface of the blade mold and the side flange are connected together by hand laying.

[0014] As a further preferred embodiment of the present application, in step one, the positions of the two support adjusters respectively installed on the steel structure of the root of the two blade molds correspond, so that the height position and the inclination angle of the circular tube can be adjusted conveniently.

[0015] As a further preferred embodiment of the present application, the support adjuster comprises a circular tube sleeve plate, a connecting plate, an adjusting nut, an adjusting bolt and a fixed L-shaped plate, the two ends of the connecting plate are fixedly connected with the circular tube sleeve plate and the adjusting bolt respectively, the circular tube is arranged in the circular tube sleeve plate, the adjusting bolt vertically penetrates through the hole in the top of the fixed L-shaped plate, the two adjusting nuts sleeved on the adjusting bolt are located on the two sides of the top of the fixed L-shaped plate respectively, the bottom of the fixed L-shaped plate is fixedly arranged on the steel structure of the root of the blade mold, the directions of the two adjusting nuts located on the two sides of the top of the fixed L-shaped plate are adjusted respectively, the position of the adjusting bolt is limited and the height of the adjusting bolt is adjusted, so that the height position of the circular tube 6 is adjusted.

[0016] As a further preferred embodiment of the present application, one end face adjuster is installed every two support adjusters, the distance between the adjacent two support adjusters is 300mm-350mm, and the distance between the adjacent two end face adjusters is 600mm-700mm, so that the intersection point of the end face of the root of the blade mold and the parting line can better disperse the stress concentration problem.

[0017] As a further preferred embodiment of the present application, in step two, the end face adjuster comprises an end face connecting plate, an L-shaped fixed plate, an end face adjusting nut and an end face adjusting bolt, one end of the end face adjusting bolt is fixedly connected with the end face connecting plate vertically, the other end of the end face adjusting bolt vertically penetrates through the top of the L-shaped fixed plate, the two end face adjusting nuts sleeved on the end face adjusting bolt are located on the two sides of the top of the L-shaped fixed plate respectively, the bottom of the L-shaped fixed plate is fixedly connected with the steel structure of the root of the blade mold, and the directions of the two end face adjusting nuts sleeved on the end face adjusting bolt are adjusted, so that the position of the end face connecting plate is limited and the height of the end face connecting plate is adjusted.

[0018] As a further preferred embodiment of the present application, the filling layer comprises 1.5% to 2% of silicon powder and the rest is resin. The filling layer with the above ratio can ensure the stability and reliability of the connection between the two parts, thereby ensuring the strength of the overall structure.

[0019] As a further preferred embodiment of the present application, the amount of resin used for pouring is 2 kg per square meter, and the resin curing time is 8 to 12 hours.

[0020] As a further preferred embodiment of the present application, in step three, the angle c of the hand lay-up layer on the rectangular tube is 1 / 4 of the hand lay-up groove depth a, and the hand lay-up groove width b is 1 / 2 of the hand lay-up groove depth a. By setting different data of the hand lay-up groove depth, the strength of the overall structure is ensured, and the precision and stability of the root reinforcement process of the negative mold are ensured.

[0021] As a further preferred embodiment of the present application, in step four, the end face connecting plate is tangent to the end face vertical surface of the blade mold.

[0022] As a further preferred embodiment of the present application, the side flange and the circular tube are arranged in parallel.

[0023] As a further preferred embodiment of the present application, the circular tube sleeve plate and the circular tube are connected in a transition fit.

[0024] As a further preferred embodiment of the present application, the size of the hole in the top of the L-shaped plate is greater than or equal to the diameter of the adjusting bolt, so that the adjusting bolt can pass through the top of the L-shaped plate.

[0025] As a further preferred embodiment of the present application, the L-shaped fixing plate and the end face adjusting bolt are connected in a clearance fit to quickly adjust the position of the end face connecting plate relative to the end face vertical surface of the blade mold.

[0026] As a further preferred embodiment of the present application, the surface of the plurality of uniformly arranged circular tubes is paved with a fiber cloth layer to obtain a blade mold main surface, and the blade mold main surface and the blade mold end face vertical surface are perpendicular to each other.

[0027] As a further preferred embodiment of the present application, the side flange and the circular tube are arranged in parallel.

[0028] As a further preferred embodiment of the present application, the filling layer provided at the middle of the circular tube and the side flange fixes the axial surface of the circular tube and the side flange.

[0029] Advantages: The super large wind power negative mold root reinforcement method provided by the present application has the following advantages compared with the prior art:

[0030] 1. By adding end face adjuster to the root steel structure of the blade mold, the size of the end face vertical surface of the blade mold is limited, the stress of the root structure of the wind power negative mold is dispersed, the effect of no deformation or deformation within the allowable tolerance range is achieved, so as to ensure the precision requirement of the blade production;

[0031] 2. The support adjuster and the end face adjuster can locally adjust the size of the main surface of the blade mold and the end face vertical surface of the blade mold, so as to ensure the connection precision and stability;

[0032] 3. By adding powdery filler between the gap between the circular pipe and the inner side contact surface of the blade mold side flange, and then pouring resin on the outer surface of the fiber cloth after paving the fiber cloth, the overall structure is more stable, and the problem of unstable size of the root of the large size wind power blade mold is fundamentally solved;

[0033] 4. The position of the circular pipe is adjusted by the support adjuster to control the overall height of the rectangular pipe, and then the fiber cloth is uniformly laid on the surface of the rectangular pipe and the circular pipe, and the resin is poured and cured, so that the strength and stability of the overall structure are guaranteed;

[0034] 5. The structure of the end face adjuster and the support adjuster is simple, stable and reliable, low in cost, easy to install, not limited in use site and size, good in use flexibility, and easy to popularize. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is an installation schematic view of the support adjuster and the end face adjuster;

[0036] Figure 2 It is an installation schematic view of the support adjuster;

[0037] Figure 3 It is a structural schematic view of the support adjuster;

[0038] Figure 4 It is an installation schematic view of the end face adjuster;

[0039] Figure 5 It is a structural schematic view of the end face adjuster;

[0040] Figure 6 It is an installation position schematic view of the rectangular pipe and the circular pipe;

[0041] Figure 7 It is an installation position schematic view of the circular pipe and the side flange;

[0042] Figure 8 It is a local sectional view of the main surface of the blade mold and the end face vertical surface of the blade mold. DETAILED DESCRIPTION

[0043] The application will be further illustrated in combination with the drawings.

[0044] The method for reinforcing the root of a large wind power negative mold comprises the following steps: installing a circular tube, installing an adjuster, connecting a rectangular tube and the circular tube, manually pasting a side flange and the circular tube, manually pasting a rectangular tube and a main surface of a blade mold, and integrating.

[0045] As shown in the drawings, the circular tube 6 is located in the middle of the two adjacent blade mold root steel structures 9, the surface of the plurality of evenly arranged circular tubes 6 is paved with a fiber cloth layer 4 to obtain a blade mold main surface 1, the rectangular tube 7 is fixedly arranged on the radial surface of the end of the circular tube 6, the support adjuster 8 is arranged on the inner side of the blade mold root steel structure 9, the end face adjuster 10 is fixed on the end face of the blade mold root steel structure 9, the two ends of the side flange 3 are respectively fixed on the top of the two adjacent blade mold root steel structures 9, the side flange 3 and the circular tube 6 are arranged in parallel, and the filling layer 5 arranged in the middle of the circular tube 6 and the side flange 3 fixedly connects the axial surface of the circular tube 6 and the side flange 3.

[0046] The two ends of the connecting plate 82 are respectively fixedly connected with the circular tube sleeve plate 81 and the adjusting bolt 84, the circular tube 6 is arranged in the hole of the circular tube sleeve plate 81, the circular tube sleeve plate 81 and the circular tube 6 are connected in a transition fit mode, the adjusting bolt 84 vertically penetrates the hole in the top of the fixed L-shaped plate 85, the hole in the top of the fixed L-shaped plate 85 is larger than or equal to the diameter of the adjusting bolt 84, the two adjusting nuts 83 sleeved on the adjusting bolt 84 are respectively located on the two sides of the top of the fixed L-shaped plate 85, and the bottom of the fixed L-shaped plate 85 is fixedly arranged on the blade mold root steel structure 9.

[0047] One end of the end face adjusting bolt 104 is fixedly connected with the end face connecting plate 101 in a vertical mode, the other end of the end face adjusting bolt 104 vertically penetrates the hole in the top of the L-shaped fixed plate 102, the L-shaped fixed plate 102 and the end face adjusting bolt 104 are connected in a clearance fit mode, the two end face adjusting nuts 103 sleeved on the end face adjusting bolt 104 are respectively located on the two sides of the top of the L-shaped fixed plate 102, and the bottom of the L-shaped fixed plate 102 is fixedly connected with the blade mold root steel structure 9. Example 1

[0048] Step one, the bottom of two fixed L-shaped plate 85 is fixed in two blade mold root steel structure 9 respectively through the way of welding, at this time, the position of two fixed L-shaped plate 85 is opposite, then one end of round pipe 6 is through the round pipe sleeve plate 81, adjust the bolt 84 through the hole in the top of fixed L-shaped plate 85, then use two adjusting nuts 83 to rotate on the adjusting bolt 84 to control the height of round pipe 6, the other end of round pipe 6 is through another round pipe sleeve plate 81 installed on the blade mold root steel structure 9, then adjust the adjusting nut 83 on the two support adjuster 8 to determine the horizontal height and inclination angle of round pipe 6, in turn, round pipe 6 is evenly arranged and installed on the inner side of two blade mold root steel structure 9, the blade mold main surface 1 is obtained by hand lay-up resin on the upper surface of multiple round pipes 6, the thickness of blade mold main surface 1 obtained by hand lay-up resin is twice the value of blade mold end face elevation 2, the thickness of the connecting part to the outer edge of the elevation is decreasing trend;

[0049] Step two, the bottom of L-shaped fixed plate 102 is welded on the end face of blade mold root steel structure 9, after the end face adjusting bolt 104 is through the hole in the top of L-shaped fixed plate 102, the two end face adjusting nuts 103 sleeved on the end face adjusting bolt 104 vertically fix the end face adjusting bolt 104 on the top of L-shaped fixed plate 102;

[0050] Step three, the rectangular pipe 7 is fixed on the radial surface of the end of multiple round pipes 6 by welding or threaded connection;

[0051] Step four, the two ends of side flange 3 are respectively fixed on the top of adjacent two blade mold root steel structure 9, the side flange 3 and round pipe 6 are arranged in parallel, the axial surface of round pipe 6 and side flange 3 are fixed by the filler layer 5 arranged in the middle of round pipe 6 and side flange 3, then 3 layers of fiber cloth 4 are laid on the outer surface of side flange 3 and round pipe 6, the resin is poured on fiber cloth 4 and solidified for 8h, the filler layer 5 includes the following specific components: 1.5% of silicon powder and the rest is resin, the amount of resin is 2kg per square meter;

[0052] Step five, the rectangular pipe 7 and blade mold main surface 1 are connected together by hand lay-up resin to obtain hand lay-up layer, the rectangular pipe 7 and blade mold main surface 1 are fixed by the filler layer 5 arranged in the middle of rectangular pipe 7 and blade mold main surface 1, then 3 layers of fiber cloth 4 are laid on the connecting part of blade mold main surface 1 and rectangular pipe 7, the resin is poured on fiber cloth 4 and solidified for 8h;

[0053] The filler layer 5 includes the following specific components: 1.5% of silicon powder and the rest is resin, the amount of resin is 2kg per square meter;

[0054] The hand lay-up layer angle c on the rectangular tube 7 is 1 / 4 of the hand lay-up groove depth a, the hand lay-up groove width b is 1 / 2 of the hand lay-up groove depth a, the direction of the end face connecting plate 101 should be tangent to the whole blade root circle, by setting the depth of the hand lay-up groove with different data and the connecting mode of the end face connecting plate and the whole blade root, the strength of the whole structure is ensured, the precision and stability of the root reinforcing process of the negative mold are ensured;

[0055] The rectangular tube 7 is fixedly connected with the blade mold main face 1 by hand lay-up to ensure the stability and reliability of the whole structure of the blade mold main face 1, the end face connecting plate 101 abuts against the blade mold end face vertical surface 2 to limit the size of the blade mold end face vertical surface 2, the stress of the root structure of the wind power negative mold is dispersed, the effect of no deformation or deformation within the allowable tolerance range is achieved, thereby the precision requirement of blade production is ensured, 3 layers of fiber cloth 4 are laid on the surfaces of the rectangular tube 7 and the end face connecting plate 101, the fiber cloth 4 is poured with resin and cured for 8 hours, thereby the strength and stability of the whole structure are ensured.

[0056] Step six, the blade mold main face 1, the blade mold end face vertical surface 2 and the side flange 3 are connected together by hand lay-up to ensure the strength, stability and reliability of the whole structure. Example 2

[0057] Step one, the bottoms of the two fixed L-shaped plates 85 are fixed on the inner sides of the two blade mold root steel structures 9 by welding, at this time, the positions of the two fixed L-shaped plates 85 are opposite, then one end of the circular tube 6 passes through the circular tube sleeve plate 81, the adjusting bolts 84 pass through the holes in the top of the fixed L-shaped plates 85, then the two adjusting nuts 83 are rotated on the adjusting bolts 84 to control the height of the circular tube 6, the other end of the circular tube 6 passes through the other circular tube sleeve plate 81 installed on the blade mold root steel structure 9, then the adjusting nuts 83 on the two supporting adjusters 8 are adjusted at the same time to determine the horizontal height and inclination angle of the circular tube 6, the circular tubes 6 are uniformly arranged and installed on the inner sides of the two blade mold root steel structures 9 in turn, the blade mold main face 1 is obtained on the upper surfaces of the plurality of circular tubes 6 by hand lay-up resin, the thickness of the blade mold main face 1 obtained by hand lay-up resin is twice the value of the blade mold end face vertical surface 2, and the thickness of the connecting part to the outer edge part of the vertical surface decreases in a decreasing trend;

[0058] Step two, the bottom of the L-shaped fixed plate 102 is welded on the end face of the blade mold root steel structure 9, the end face adjusting bolts 104 pass through the holes in the top of the L-shaped fixed plate 102, and then the two end face adjusting nuts 103 sleeved on the end face adjusting bolts 104 are vertically fixed on the top of the L-shaped fixed plate 102;

[0059] Step three, the rectangular tube 7 is fixed on the end surface of the plurality of circular tubes 6 by riveting;

[0060] Step four, the two ends of the side flange 3 are respectively fixed on the top of the steel structure 9 of the adjacent two blade mold root portions, the side flange 3 and the circular tube 6 are arranged in parallel, the axial surface of the circular tube 6 and the side flange 3 are fixed by the filler layer 5 arranged in the middle of the circular tube 6 and the side flange 3, then the outer surface of the side flange 3 and the circular tube 6 is paved with the fiber fabric 4, the fiber fabric 4 is poured with resin and cured for 9h, the filler layer 5 comprises the following specific components: 1.75% of silicon powder and the rest of resin, the amount of the resin is 2kg per square meter;

[0061] Step five, the rectangular tube 7 and the blade mold main surface 1 are connected together by hand laying resin to obtain a hand laying layer, the rectangular tube 7 and the blade mold main surface 1 are fixed by the filler layer 5 arranged in the middle of the rectangular tube 7 and the blade mold main surface 1, then the connection part of the blade mold main surface 1 and the rectangular tube 7 is paved with the fiber fabric 4, the fiber fabric 4 is poured with resin and cured for 9h;

[0062] The filler layer 5 comprises the following specific components: 1.8% of silicon powder and the rest of resin, the amount of the resin is 2kg per square meter;

[0063] The hand laying layer angle c of the rectangular tube 7 is 1 / 4 of the hand laying groove depth a, the hand laying groove width b is 1 / 2 of the hand laying groove depth a, the direction of the end surface connecting plate 101 should be tangent to the overall blade root circle, by setting the depth of the hand laying groove with different data and the connection mode of the end surface connecting plate and the overall blade root, the strength of the overall structure is ensured, the precision and stability of the root reinforcement process of the negative mold are ensured;

[0064] The hand laying and fixing of the rectangular tube 7 and the blade mold main surface 1 ensures the stability and reliability of the overall structure of the blade mold main surface 1, the end surface connecting plate 101 abuts against the blade mold end surface vertical surface 2 to limit the size of the blade mold end surface vertical surface 2, so that the stress of the root structure of the wind power negative mold is dispersed, the effect of no deformation or deformation within the allowable tolerance range is achieved, so as to ensure the precision requirement of the blade production, four layers of fiber fabrics 4 are arranged on the surface of the rectangular tube 7 and the end surface connecting plate 101, the fiber fabrics 4 are poured with resin and cured for 8h~12h, so as to ensure the strength and stability of the overall structure.

[0065] Step six, the blade mold main surface 1, the blade mold end surface vertical surface 2 and the side flange 3 are connected together by hand laying to ensure the strength, stability and reliability of the overall structure. Example 3

[0066] Step one, the bottom of two fixed L-shaped plate 85 is respectively fixed in two blade mold root steel structure 9 by welding, at this time, the position of two fixed L-shaped plate 85 is opposite, then one end of round pipe 6 is passed through round pipe sleeve plate 81, adjust bolt 84 is passed through the hole in the top of fixed L-shaped plate 85, then two adjusting nuts 83 are rotated on adjust bolt 84 to control the height of round pipe 6, the other end of round pipe 6 is passed through another round pipe sleeve plate 81 installed on blade mold root steel structure 9, then the horizontal height and inclination angle of round pipe 6 are determined by adjusting the adjusting nuts 83 on two support adjusters 8 at the same time, in turn, round pipe 6 is evenly arranged and installed on the inner side of two blade mold root steel structure 9, blade mold main surface 1 is obtained by hand lay-up resin on the upper surface of multiple round pipes 6, the thickness of blade mold main surface 1 obtained by hand lay-up resin is twice the value of blade mold end face elevation 2, the thickness of the connecting part to the outer edge part of elevation is decreasing trend;

[0067] Step two, the bottom of L-shaped fixed plate 102 is welded on the end face of blade mold root steel structure 9, after end face adjusting bolt 104 is passed through the hole in the top of L-shaped fixed plate 102, two end face adjusting nuts 103 are sleeved on end face adjusting bolt 104 to vertically fix end face adjusting bolt 104 on the top of L-shaped fixed plate 102;

[0068] Step three, rectangular pipe 7 is fixed on the radial surface of the end of multiple round pipes 6 by threaded connection;

[0069] Step four, the two ends of side flange 3 are respectively fixed on the top of adjacent two blade mold root steel structure 9, the side flange 3 and round pipe 6 are arranged in parallel, the axial surface of round pipe 6 and side flange 3 are fixed by the filler layer 5 arranged in the middle of round pipe 6 and side flange 3, then four layers of fiber cloth 4 are laid on the outer surface of side flange 3 and round pipe 6, resin is poured on fiber cloth 4 and solidified for 12 hours, filler layer 5 includes the following specific components: 2% of silicon powder and the rest of resin, the amount of resin is 2 kilograms per square meter;

[0070] Step five, the rectangular pipe 7 and blade mold main surface 1 are connected together by hand lay-up resin to obtain hand lay-up layer, the rectangular pipe 7 and blade mold main surface 1 are fixed by the filler layer 5 arranged in the middle of rectangular pipe 7 and blade mold main surface 1, then four layers of fiber cloth 4 are laid on the connecting part of blade mold main surface 1 and rectangular pipe 7, resin is poured on fiber cloth 4 and solidified for 12 hours;

[0071] Filler layer 5 includes the following specific components: 2% of silicon powder and the rest of resin, the amount of resin is 2 kilograms per square meter;

[0072] The hand lay-up layer angle c on the rectangular tube 7 is 1 / 4 of the hand lay-up groove depth a, the hand lay-up groove width b is 1 / 2 of the hand lay-up groove depth a, the end face connecting plate 101 direction should be tangent to the whole blade root circle, by setting different data of the hand lay-up groove depth and the connecting mode of the end face connecting plate and the whole blade root, the strength of the whole structure is ensured, the precision and stability of the root reinforcing process of the negative mold are ensured;

[0073] The rectangular tube 7 and the blade mold main face 1 are hand lay-up fixed to ensure the stability and reliability of the whole structure of the blade mold main face 1, the end face connecting plate 101 is abutted with the blade mold end face vertical surface 2 to limit the size of the blade mold end face vertical surface 2, the stress of the root structure of the wind power negative mold is dispersed, the effect of no deformation or deformation within the allowable tolerance range is achieved, thereby the precision requirement of the blade production is ensured, four layers of fiber cloth 4 are laid on the surface of the rectangular tube 7 and the end face connecting plate 101, the fiber cloth 4 is poured with resin and cured for 12 hours, thereby the strength and stability of the whole structure are ensured.

[0074] Step six, the blade mold main face 1, the blade mold end face vertical surface 2 and the side flange 3 are connected together by the hand lay-up mode, thereby the strength, stability and reliability of the whole structure are ensured.

[0075] The above embodiment is only for illustrating the technical concept and characteristics of the present application, the purpose is to enable the skilled in the art to understand the content of the present application and to implement, and cannot limit the protection scope of the present application. Any equivalent transformation or modification according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A method of reinforcing the root of an ultra-large wind turbine negative mold, characterized in that: The specific steps of the method are as follows: Step one, install the round pipe Two support adjusters (8) are fixed on the inner side of the two blade mold root steel structures (9), and the two ends of the round pipe (6) are respectively installed on the support adjusters (8). The blade mold main surface (1) is obtained by hand laying resin on the upper surface of the plurality of round pipes 6. The thickness of the blade mold main surface (1) obtained by hand laying resin is twice the value of the blade mold end surface elevation (2), and the thickness of the connecting part to the outer edge part of the elevation is in a decreasing trend; Step two, install the adjuster The end surface adjuster (10) is fixed on the end surface of the blade mold root steel structure (9); Step three, connect the rectangular pipe and the round pipe The end surface of the rectangular pipe (7) and the plurality of round pipes (6) are radially connected; Step four, hand lay the side flange and the round pipe The two ends of the side flange (3) are respectively fixed on the top of the adjacent two blade mold root steel structures (9). The filling layer (5) provided in the middle of the side flange (3) and the round pipe (6) connects the axial surface of the round pipe (6) and the side flange (3). Then, the fiber cloth (4) is laid on the outer surface of the side flange (3) and the round pipe (6) by hand laying; Step five, hand lay the rectangular pipe and the blade mold main surface The filling layer (5) in the middle of the rectangular pipe (7) and the blade mold main surface (1) connects the rectangular pipe (7) and the blade mold main surface (1). The end surface adjuster (10) is adjusted and abuts against the blade mold end surface elevation (2). The fiber cloth (4) and the pouring resin are laid on the surface of the rectangular pipe (7) and the end surface adjuster (10) and are solidified; Step six, integration The blade mold main surface (1), the blade mold end surface elevation (2) and the side flange (3) are connected together by hand laying.

2. The method of reinforcing the root of an ultra-large wind turbine cavity mold according to claim 1, wherein: In step one, the positions of the two support adjusters (8) respectively installed on the two blade mold root steel structures (9) correspond.

3. The method of claim 2, wherein: The support adjuster (8) comprises a round pipe sleeve plate (81), a connecting plate (82), an adjusting nut (83), an adjusting bolt (84) and a fixed L-shaped plate (85). The two ends of the connecting plate (82) are respectively connected with the round pipe sleeve plate (81) and the adjusting bolt (84). The round pipe (6) is provided in the round pipe sleeve plate (81). The adjusting bolt (84) vertically penetrates the hole in the top of the fixed L-shaped plate (85). The two adjusting nuts (83) sleeved on the adjusting bolt (84) are respectively located on the two sides of the top of the fixed L-shaped plate (85). The bottom of the fixed L-shaped plate (85) is fixed on the blade mold root steel structure (9).

4. The method of reinforcing the root of an ultra-large wind turbine cavity mold according to claim 3, wherein: An end surface adjuster (10) is installed every two support adjusters (8). The distance between the adjacent two support adjusters (8) is 300mm-350mm, and the distance between the adjacent two end surface adjusters (10) is 600mm-700mm.

5. The method of reinforcing the root of an ultra-large wind turbine cavity mold according to claim 1, wherein: In step two, the end surface adjuster (10) comprises an end surface connecting plate (101), an L-shaped fixed plate (102), an end surface adjusting nut (103) and an end surface adjusting bolt (104). One end of the end face adjusting bolt (104) is vertically connected with the end face connecting plate (101), the other end of the end face adjusting bolt (104) vertically penetrates the top of the L-shaped fixing plate (102), two end face adjusting nuts (103) sleeved on the end face adjusting bolt (104) are respectively located on the two sides of the top of the L-shaped fixing plate (102), and the bottom of the L-shaped fixing plate (102) is fixedly connected with the blade mold root steel structure (9).

6. The method of reinforcing the root of an ultra-large wind turbine cavity mold according to claim 1, wherein: The filling layer (5) comprises the following specific components: 1.5%-2% of silicon powder and the rest of resin.

7. The method of reinforcing the root of an ultra-large wind turbine cavity mold according to claim 1, wherein: The amount of the cast resin is 2 kg per square meter, and the resin curing time is 8-12 h.

8. The method of reinforcing the root of an ultra-large wind turbine cavity mold according to claim 1, wherein: In step three, the hand lay-up layer angle c on the rectangular tube (7) is 1 / 4 of the hand lay-up groove depth a, and the hand lay-up groove width b is 1 / 2 of the hand lay-up groove depth a.

9. The method of reinforcing the root of an ultra-large wind turbine cavity mold according to claim 1, wherein: In step four, the end face connecting plate (101) is tangent to the blade mold end face vertical surface (2).

10. The method of reinforcing the root of an ultra-large wind turbine cavity mold according to claim 1, wherein: The side flange (3) and the circular tube (6) are arranged in parallel.

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