CN201963494U - Root baffle of large composite material wind-power blade - Google Patents

Abstract

The utility model discloses a root baffle of a large-scale composite material wind power blade, which is assembled from a round cover and an annular baffle; wherein, the outer surface of the round cover is planar; The periphery of the inner surface of the circular cover is relatively connected; the outer edge of the annular baffle is bonded vertically to the inner wall of the root of the large composite wind power blade; The inner surface of the round cover and the inner surface of the annular baffle are respectively covered with vertical ribs and reinforcing ribs; the annular baffle is assembled from four 1/4-circle arc-shaped plates; There are 4 bolt connection holes evenly distributed around the cover; on the inner edge of the 4 arc-shaped plates, there is a pre-embedded nut corresponding to the position of the bolt connection hole on the round cover; it is convenient for loading and unloading, and is conducive to later transportation ; The setting of the ribs enables it to meet the maximum load requirement of 300 kg; and it has good impact resistance, which is beneficial to popularization and implementation.

Description

Root baffle of a large composite material wind turbine blade

technical field

The invention relates to a root baffle of a large composite material wind power blade, which belongs to an assembly accessory product of a large composite material wind power blade.

Background technique

With the improvement of wind turbine blade design technology, large-scale and lightweight has become an important trend in the development of composite wind turbine blades. At present, large-scale composite wind power blades mainly use glass fiber as a hollow structure as a reinforcing material. The vibration will have an impact on the structure of the blade. When the higher shear stress acts repeatedly, micro-cracks will be formed, and these micro-cracks will extend to the adjacent area of the air outer wall shell, making the viscose and the composite outer wall shell The strength is reduced, and the overall rigidity of the outer wall shell is damaged, resulting in cracking of the outer wall shell and blade breakage; in offshore wind farms, blades must resist long-term high humidity and high salinity corrosion, and at the same time, in harsh environments such as typhoons, The turbulence of the airflow causes the blades of the fan to bear a large load, and some extreme loads directly cause the blades to break.

The above-mentioned unfavorable factors will have a major impact on the safe production of wind turbines, and also have higher requirements for the blade structure of the wind turbine. That is: 1) The hollow structure of the blade is required to be closed and prevent particles from entering the inside of the blade; 2) To prevent the accumulation of particles, rain, and dust inside the blade and cause the blade to increase its own weight; 3) To prevent the deposition of particles, rain, and dust inside the blade and rotate with the blade Fall into the generator inside the nacelle cover.

In addition, as the service life of the blade increases, when the blade fails and requires maintenance, the main working point is located at the root of the blade; therefore, the structural setting, installation and use of the root baffle will play a very important role in the maintenance of the blade. As a traditional root baffle, its molding process adopts the hand lay-up method. The formed round cover and baffle are both solid core shapes. In order to meet the overall strength of the wind turbine blade root baffle and the maximum load on the outer surface of the entire baffle, The dome and the baffle must also have a certain thickness; therefore, in the process of forming, installing and maintaining the root baffle, the following problems will occur: 1) The molding methods of the solid dome and the baffle are all manual The operation and equipment are simple and not suitable for large-scale production; even if it is a small batch production, it cannot guarantee that all products have the same size, which will cause inconvenience to later installation. 2) The solid round cover and ring baffle are heavy and heavy, which is not conducive to batch transportation, especially when installing, it requires more operators, which directly increases the cost of use for customers; 3) The solid round cover After being combined with the annular baffle and installed at the root of the blade, in order to meet the customer's appearance color requirements, the root baffle must be subjected to surface painting treatment, thus resulting in increased use costs. It can be seen that the setting of the baffle at the root of the blade directly affects the large-scale and lightweight production and market application of large-scale composite wind power blades.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the purpose of this utility model is to provide a root baffle of a large composite material wind power blade that is installed at the root of the wind power blade, can carry a certain load, and is easy to disassemble from the blade.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a root baffle of a large composite material wind power blade, which is assembled from a round cover and an annular baffle; wherein, the outer surface of the round cover is planar; the annular baffle The inner edge of the outer surface of the plate is relatively connected to the periphery of the inner surface of the circular cover; the outer edge of the annular baffle is bonded vertically to the inner wall of the root of the large composite material wind power blade; its characteristics are: the annular baffle and the circular The thickness of the cover is the same, and the thickness is 4-5 mm; the inner surface of the circular cover and the inner surface of the annular baffle are respectively covered with vertical ribs and reinforcing ribs. Wherein, the radius of the round cover is 299-550mm; the radius from the center of the circle to the inner edge of the annular baffle is set at 250-500mm relative to the radius of the round cover, and the width from the outer edge of the annular baffle to its inner edge is 531mm. ~533mm.

The above-mentioned annular baffle is assembled by four 1/4-circle arc-shaped plates; the inner edge, outer edge, two sides of the arc-shaped plate and the periphery of the inner surface of the circular cover are respectively provided with flanges with the same width side, the width of the flange side is 49-50mm; there are 4 bolt connection holes evenly distributed along the periphery of the flange side of the round cover; a pre-embedded nut, the position of the pre-embedded nut corresponds to the position of the bolt connection hole on the flange of the round cover; A number of regularly arranged anti-skid studs are evenly distributed on the enclosed position. The anti-skid studs are radially and circularly distributed; the distance between the anti-skid studs in two adjacent rows is the same, both being 30-50mm; The inner edge to the outer edge gradually increases, 40-90mm;

The periphery of the inner surface of the above-mentioned round cover is a circle of vertical ribs; from the vertical ribs to its center of circle 27mm, a circle of bosses is provided, and a circle of sealing grooves are provided along the upper surface of the bosses. The heights are the same; the bolt connection holes are located between the outside of the boss and the vertical ribs on the periphery of the round cover; the reinforcing ribs are regularly distributed on the inner surface from the boss to the center of the circle; wherein, the reinforcing ribs It is formed by a plurality of radial reinforcing ribs centered on the center of the circle, uniformly scattered outward and connected to the boss around the dome, and a plurality of circular reinforcing ribs with the same center, the same interval and different radii; among them, The distance between two adjacent circular reinforcing ribs is the same, and they all expand from the center of the circle to the periphery of the dome at an equal radius; the radiation angles of the two adjacent radial reinforcing ribs are the same.

The radial reinforcing ribs on the dome are divided into long segment radial reinforcing ribs, middle segment radial reinforcing ribs and short segment radial reinforcing ribs; the circular reinforcing ribs are divided into main circular reinforcing ribs and auxiliary circular reinforcing ribs; there are 3 main circular reinforcing ribs , distributed in the outer ring, middle ring and inner ring of the dome at intervals; the distance from the outside of the main ring reinforcement rib of the outer ring to the outside of the boss of the dome cover is 28mm; from the main ring reinforcement rib of the outer ring to the main ring reinforcement of the middle ring There are 3 auxiliary circular reinforcing ribs between the ribs, between the main circular reinforcing ribs of the middle ring and the main circular reinforcing ribs of the inner ring, and between the main circular reinforcing ribs of the inner ring and the center of the circle; there are 8 long radial reinforcing ribs, All are distributed in an equiangular manner from the center of the circle to the outside; in the middle of every two adjacent long-section radiation reinforcement ribs, there is one middle radiation reinforcement rib in an equiangular manner, and the inner end of the middle radiation reinforcement rib is connected to the The auxiliary annular ribs located in the inner ring are connected; the short-section radiation ribs are equiangularly distributed between the adjacent long-section radiation reinforcement ribs and the middle-section radiation reinforcement ribs; the inner end of the short-section radiation reinforcement ribs It is connected with the auxiliary annular rib located between the middle annular rib and the inner annular rib.

The height of the main ring rib of the outer ring mentioned above is 36mm, the height of the main ring rib of the middle ring and the main ring rib of the inner ring are equal, both are 25mm; the height of the auxiliary ring rib is 5mm; the above-mentioned long section of the radiation rib The height of the rib is 10mm, and the height of the middle radiation rib and the short radiation rib is the same, both are 3.5mm.

The inner flange of a 1/4 round arc-shaped plate is recessed from the outer surface of the arc-shaped plate to its inner surface, and the height of the recess is 16mm; the distance between the recessed inner flange and the The inner edge 14mm of the arc-shaped plate is provided with a rib with the same radian, the width of the rib is the same as the width of the sealing groove on the dome cover, and the height of the rib is less than the depth of the sealing groove, so There is also a sealing strip between the bottom end of the rib and the bottom end of the sealing groove; the embedded nut is located between the inner side of the rib and the inner edge of its inner flange; A number of regularly arranged anti-skid nails are evenly distributed between the inner side of the inner flange and the inner side of the outer flange on the outer surface of the plate.

The flanges on both sides of the arc-shaped plate are side flanges; wherein, the side flange adjacent to the side of the embedded nut is recessed from the outer surface of the arc-shaped plate to the inner surface, and the recessed The height is 5mm; relative to the inner surface of the arc plate, the side flange and the inner flange are convex; the outer edge of the raised side flange and the inner side of the raised inner flange Both are provided with the vertical reinforcement vertically fixed to the inner surface of the arc-shaped plate, which are respectively the raised side vertical reinforcement and the inner edge vertical reinforcement; the inner side of the side flange side away from the embedded nut and the The inner side of the outer edge flange is provided with the vertical ribs vertically fixed to the inner surface of the arc-shaped plate, which are respectively outer edge vertical ribs and side vertical ribs; the raised side vertical ribs, inner edge vertical ribs The upper ends of the ribs, the outer edge ribs and the side ribs are all flush, and the thickness is 4mm; 3 uniformly distributed reinforcement platforms are integrally formed on the raised side ribs and the side ribs , the length x width x height of the reinforced platform is 35mm x 35mm x 6mm, and the middle part of the reinforced platform is provided with a fixed installation hole connected with its fixed vertical rib; the four arc-shaped plates pass through the vertical ribs on both sides The fixed mounting holes are fixedly connected with each other by bolts to form the annular baffle.

The above-mentioned reinforcing ribs are regularly arranged between the inner vertical ribs, the outer vertical ribs and the side vertical ribs on the inner surface of the arc-shaped plate; the reinforcing ribs on the inner surface of the arc-shaped plate are composed of multiple equally spaced The radial reinforcing ribs are cross-distributed with a plurality of arc-shaped reinforcing ribs with the same radian as the arc-shaped plate and arranged at equal intervals; among them, the upper and lower spacing of two adjacent arc-shaped reinforcing ribs is the same, and the adjacent two radial-shaped reinforcing ribs The left and right spacing of the ribs is the same, and they are gradually increased from the inner edge to the outer edge of the arc-shaped plate; the radial ribs are divided into long-section radiation reinforcement ribs, middle-section radiation reinforcement ribs and short-section radiation reinforcement ribs. The outer ends are all fixedly connected to the outer edge vertical ribs of the arc-shaped plates; the arc-shaped ribs are divided into main arc-shaped ribs and auxiliary arc-shaped ribs, wherein, the main arc-shaped ribs are provided with 3, and the interval Distributed on the outer ring, middle ring and inner ring of the arc-shaped plate; four auxiliary arc-shaped reinforcing ribs are arranged at intervals between the outer vertical rib and the main arc-shaped reinforcing rib of the outer ring; the main arc of the outer ring There are 5 auxiliary arc-shaped ribs at intervals between the main arc-shaped ribs of the middle circle and the main arc-shaped ribs of the middle ring; Auxiliary arc-shaped ribs; one auxiliary arc-shaped rib is provided between the main arc-shaped ribs of the inner ring and the vertical ribs on the inner edge of the arc-shaped plate; five long-section radial ribs are provided, and The inner end is fixedly connected to the inner vertical rib of the arc-shaped plate; between the vertical ribs on both sides and the adjacent long-segment radiation reinforcing ribs, and between the adjacent two long-segment reinforcing ribs, there is one middle section Radiation reinforcement, the inner end of the middle radiation reinforcement is fixedly connected to the main arc reinforcement of the inner ring; between the middle radiation reinforcement and the vertical reinforcement on both sides and between the middle radiation reinforcement and the long radiation reinforcement Each is provided with a short-section radiating rib, and the inner end of the short-section radiating rib is fixedly connected to the auxiliary arc-shaped rib outside the main arc-shaped rib in the middle section.

The height of the above-mentioned long-section radiation reinforcement is 3-50mm; the height of the middle radiation reinforcement and the short radiation reinforcement are the same, both 3.5mm; the height of the main arc-shaped reinforcement is 25mm, and the height of the auxiliary arc-shaped reinforcement is 5mm.

Due to the adoption of the above-mentioned technical scheme, the beneficial effects of the utility model are as follows: 1) The root baffle of the wind power blade is designed as an assembled structure, and the complete annular baffle is designed as four 1/4-circle arc-shaped plates, 4 The annular baffle assembled by 1/4 round arc-shaped plate is connected with the round cover by bolts, which is convenient for disassembly and assembly, which greatly facilitates the installation and transportation of the blade root baffle product; at the same time, it can also meet the requirements of the product. The maximum load requirement of 300 kg during the process. 2) The thickness of the annular baffle and the round cover is very thin, only 4-5mm; on the inner surface of the round cover and the inner surface of the four 1/4 round arc plates, there are several reinforcing ribs integrated with it. Including the center of the circle, the radially diverging radial reinforcing ribs and multiple arc-shaped reinforcing ribs with the same radian as the edge of the arc-shaped plate are arranged crosswise, which effectively enhances the overall strength of the root baffle and is sufficient to meet the requirements of the entire baffle. The maximum load on the outer surface of the plate. 3) A number of regularly arranged and scattered anti-skid nails are installed on the outer surface of the arc-shaped plate to form the anti-skid layer on the outer surface of the root baffle of the utility model; when the blade is maintained, the position of the blade root baffle can be adjusted according to the different maintenance parts , adjust the blade to a state that is easy to maintain; when it is necessary to maintain the joint between the blade root and the nacelle cover, the blade tip can be vertical to the ground, and the maintenance personnel stand on the cleat surface of the ring baffle for maintenance, because The setting of the anti-skid structure enhances the safety of the maintenance personnel during maintenance; if there is a fault inside the blade, the blade can be rotated to be parallel to the ground, and the maintenance personnel can open the round cover and enter the inside of the blade through the hole in the middle of the ring baffle Carry out maintenance; after the maintenance, the outer edge of the round cover and the inner edge of the ring baffle can be easily assembled together with bolts; it is convenient, flexible, safe and reliable; 4) Assembling four 1/4-circle arc plates and the round cover The structure has low requirements for installation and construction conditions, convenient disassembly, and high work efficiency; at the same time, because of its light weight, it is conducive to batch transportation. 5) The forming of the round cover and the 1/4 round arc-shaped plate adopts the method of steel mold pressing, which can effectively solve the defect that manual operation cannot make all products consistent in size, and ensure the success rate of later installation.

Description of drawings

Fig. 1 is a schematic diagram of the outer surface structure of the dome.

Fig. 2 is a schematic diagram of the structure of the inner surface of the dome.

Fig. 3 is a structural schematic diagram of the outer surface of a 1/4 circle arc-shaped plate.

Fig. 4 is a structural schematic diagram of the inner surface of a 1/4 circle arc-shaped plate.

FIG. 5 is a schematic diagram of the connection manner between the periphery of FIG. 1 and the inner edge of FIG. 3 .

FIG. 6 is a schematic diagram of a connection manner between the periphery of FIG. 2 and the inner edge of FIG. 4 .

Detailed ways

The root baffle of the large-scale composite material wind power blade of the utility model is assembled by an annular baffle and a circular cover with the same center and thickness; wherein, the inner edge of the outer surface of the annular baffle is relatively connected with the periphery of the inner surface of the circular cover The outer edge of the annular baffle is vertically bonded to the root inner wall of the large composite material wind power blade; it is installed on the root of the large composite material wind power blade.

Among them, the thickness of the annular baffle and the dome are both 4-5 mm, and the thickness selection is determined according to the scale of the wind power blades.

The radius of the dome is 299-550mm; the radius from the center of the circle to the inner edge of the annular baffle is set at 250-500mm relative to the radius of the dome, and the width from the outer edge to the inner edge of the annular baffle is 531-533mm.

The outer surface of the round cover is flat; the inner surface of the round cover is surrounded by a ring of vertical ribs, and a ring of bosses are provided at a distance of 27 mm from the vertical ribs to the center of the circle. Sealing grooves are opened on the bosses. The groove depth of the sealing grooves is the same as The height of the boss is the same; there are 4 bolt connection holes evenly distributed along the circumference between the outer side of the boss and the vertical rib around the round cover; the inner surface of the round cover from the boss to the center of the circle is covered with integrally formed Reinforcing ribs: The reinforcing ribs are composed of multiple radial reinforcing ribs centered on the center of the circle, uniformly scattered outward and connected to the boss around the dome, and multiple circular reinforcing ribs with the same center, the same interval and different radii. Among them, the distance between two adjacent circular reinforcing ribs is the same, both are 20-35mm, expanding from the center of the circle to the periphery of the circular cover with an equal radius; the radiation angle of two adjacent radial reinforcing ribs The same, both are 27.5゜.

The outer and inner edges of the annular baffle are provided with flanges respectively, and the width of the flanges is 49-50mm; wherein, the inner flange of the outer surface of the annular baffle is recessed from this surface, and the recessed The height of the flange is 16mm; there is a ring of ribs 14mm away from the inner edge of the annular baffle on the recessed inner flange, the width of the ribs is 5mm, and the height is 5mm; the inner side of the ribs to There are 4 embedded nuts evenly distributed along the circumference between the inner edges of the inner flange, and the distribution of the embedded nuts is set corresponding to the position of the bolt connection holes around the circular cover; A number of regularly arranged anti-skid studs are evenly distributed on the surface between the inner side of the outer flange and the inner side of the outer flange.

The annular baffle of the utility model is an assembled type, and the whole annular baffle is assembled and fixed by four 1/4 round arc-shaped plates.

The technical scheme of the utility model is described in detail below in conjunction with accompanying drawing.

As shown in Fig. 1, the used root baffle of the utility model is the root baffle of large-scale composite material wind power blade, and the radius of its dome 8 is 550mm, and can also be selected in the radius range of 299～550mm; The outer surface is planar, and four bolt connection holes 7 are arranged at equal angles along its periphery.

Among them, the limitation of the size of the dome 8 is firstly required to be able to meet the free entry and exit of the staff. Therefore, the minimum radius of the dome cannot be less than 299mm; in addition, according to the arm extension of ordinary people, the maximum radius of the dome cannot exceed 550mm, otherwise, If the round cover is too large, the product will be too heavy for installation and disassembly.

As shown in Figure 2, the periphery of the inner surface of the round cover is a circle of vertical ribs 6 with a height of 10 mm; a circle of bosses 11 are arranged at a distance of 27 mm from the vertical ribs 6 to the center of the circle, and the width of the bosses is 11 mm and the height is 10 mm. ; On the boss 11, a sealing groove is provided, the width of the sealing groove is 5mm, the groove depth is 10mm, and the groove walls on both sides are 3mm; For tightness and better sealing effect, an EPDM sealing strip with a width of 5mm and a height of less than 10mm can also be placed in the sealing groove according to needs; There are 4 bolt connection holes, and the height of the bolt connection holes is the same as that of the boss 11.

The inner surface of the dome cover from the boss 11 to the inner surface of the center of the circle is covered with integrally formed circular reinforcing ribs; The radial reinforcing ribs connected to the boss 11 are formed by intersecting multiple circular reinforcing ribs with the same center, the same interval and different radii; among them, the distance between two adjacent circular reinforcing ribs is the same, both are 20-35mm, and the most The best value is 30 mm; it expands from the center of the circle to the periphery of the dome with an equal radius; the radiation angles of two adjacent radial ribs are the same, both 27.5°.

The radial reinforcing ribs are divided into long radial reinforcing ribs 9, middle radial reinforcing ribs 9' and short radial reinforcing ribs 9"; the circular reinforcing ribs are divided into main circular reinforcing ribs 10 and auxiliary circular reinforcing ribs 10'; among them,

The main annular reinforcing rib 10 is provided with 3 strips, which are distributed at intervals on the outer ring, middle ring and inner ring of the inner surface of the dome; the distance from the outer ring main annular reinforcing rib to the boss 11 of the dome is 28 mm; There are 3 auxiliary ring ribs respectively between the main ring rib of the ring and the main ring rib of the middle ring, between the main ring rib of the middle ring and the main ring rib of the inner ring, and between the main ring rib of the inner ring and the center of the circle. ;

There are 8 long-section radiation reinforcing ribs 9, which are distributed in an equiangular manner outward from the center of the circle; 8 middle-section radiation reinforcing ribs 9' are provided, and the distance between each two adjacent long-section radiation reinforcing ribs 9 is equal. There is a middle radial reinforcing rib 9' sandwiched in the corner mode; the inner end of the middle radial reinforcing rib 9' is connected to the auxiliary annular reinforcing rib located in the inner ring; there are 16 short radial reinforcing ribs 9", Between the adjacent long section radiation reinforcement rib 9 and the middle section radiation reinforcement rib 9', there is a short section radiation reinforcement rib 9" sandwiched in an equiangular manner. The reinforcing rib is connected with the auxiliary annular reinforcing rib 10' between the inner annular reinforcing rib.

Among them, the height of the main ring rib of the outer ring is 36mm, the height of the main ring rib of the middle ring and the main ring rib of the inner ring are equal, both are 25mm; the height of the auxiliary ring rib 10' is 5mm; the long section of the radiation rib The height of 9 is 10mm, and the heights of the middle radiation rib 9' and the short radiation rib 9" are the same, both being 3.5 mm.

The setting of the main ring-shaped rib 10 and the long-section radiation rib 9 can effectively enhance the bending strength and tensile strength of the dome 8; The setting of " has strengthened the impact strength of this dome 8.

Auxiliary circular ribs 10', middle radial ribs 9' and short radial ribs 9" are designed to improve the impact resistance of the product and effectively reduce the direct impact of debris on the product itself. When impacting a product, they are the first to be impacted to absorb energy.

The annular baffle plate of the utility model is assembled and combined by four 1/4 round arc-shaped plates; wherein,

As shown in Figure 3, there is an embedded nut 2 on each 1/4 round arc plate; the inner edge, outer edge and both sides of the outer surface of the arc plate are provided with flanges 13, which The width of the flange 13 is the same, both are 49-50mm; the inner flange edge of the arc-shaped plate and the flange edge adjacent to the embedded nut 2 side are recessed downwards from this face, and the inner flange edge is recessed The height of the side flange is 16mm; the recessed height of the side flange is 5mm; the surface of the recessed inner flange is 14mm away from the inner edge of the arc baffle with a convex edge with the same radian as the arc plate 12. The rib 12 has a width of 5mm and a height of 5mm; the embedded nuts 2 are distributed between the inner side of the rib 12 and the inner side of the flange 13, and the position of the embedded nut 2 is in line with the surrounding area of the round cover. The position of the bolt connection hole is correspondingly set; between the inner flange side of the outer surface of the arc-shaped plate and the inner side of the outer flange side, a plurality of regularly arranged anti-skid studs 1 are integrally formed; a plurality of regularly arranged The anti-skid studs 1 are radially and circularly distributed; the upper and lower distances between two adjacent rows of anti-skid studs 1 are the same, both are 30-50mm, and the best is 40mm; The inner edge to the outer edge of the arc-shaped plate gradually increases, ranging from 40 to 90 mm; the optimal distance between 1 adjacent two rows of cleats located on the inner edge is 45 mm; 1 adjacent 2 rows of cleats located on the outer edge The optimal spacing between them is 82mm.

As shown in Figure 4, relative to the recessed inner flange edge and recessed side flange edge on the outer surface of the arc-shaped plate, the inner edge flange edge and the side adjacent to the embedded nut 2 on the inner surface of the arc-shaped plate The side flanges of the side flanges are all convex, and the height of the protrusions is the height of the recess on the outer surface of the arc-shaped plate; the outer edge of the raised side flange and the inner side of the raised inner flange are vertical There are vertical ribs 14 fixed, which are respectively raised side vertical ribs and inner edge vertical ribs; they are vertically fixed on the inner side of the outer flange edge of the inner surface of the arc plate and the inner side of the side flange edge away from the embedded nut. There are vertical ribs 14, which are outer edge vertical ribs and side vertical ribs respectively; wherein, the thickness of the raised side vertical ribs, inner edge vertical ribs, outer edge vertical ribs and side vertical ribs is the same, all of which are 4mm; their upper ends They are all in the same shape, and their height is determined according to the height of the flange edge fixed at the bottom; there are 3 evenly distributed reinforcement platforms formed on the raised side ribs and side ribs, and the reinforcement platforms The length x width x height are 35mm x 35mm x 6mm, and there is a fixed installation hole in the middle of the reinforced platform that communicates with the fixed rib; The mounting holes are fixedly connected with each other by bolts to form the annular baffle.

On the inner surface of the arc-shaped plate, there are evenly distributed reinforcing ribs integrally formed with the arc-shaped plate within the inner side of the inner edge vertical rib, the inner side of the outer edge vertical rib, the inner side of the raised side vertical rib and the inner side of the side vertical rib. The ribs are formed by a plurality of radial reinforcing ribs with the same center and equal spacing and a plurality of arc-shaped reinforcing ribs with the same radian as the arc-shaped plate and arranged at equal intervals; among them, the upper and lower sides of the adjacent two arc-shaped ribs The spacing is the same, both are 20-35mm, and the left and right spacing of two adjacent radial ribs is the same, which gradually increases from the inner edge to the outer edge of the arc-shaped plate, which is 20-90mm; The distance between two adjacent radial reinforcing ribs at the vertical rib on the inner edge of the shaped plate is 20mm; the distance between two adjacent radial reinforcing ribs at the vertical rib on the outer edge of the curved plate is 90mm.

The radial reinforcing ribs are divided into long radial reinforcing ribs 4, middle radial reinforcing ribs 4' and short radial reinforcing ribs 4". There are main arc-shaped reinforcing ribs 5 and auxiliary arc-shaped reinforcing ribs 5', among which, there are three main arc-shaped reinforcing ribs 5, which are distributed in the outer ring, middle ring and inner ring of the arc-shaped plate at intervals; There are 4 auxiliary arc-shaped ribs 5' between the main arc-shaped ribs of the outer ring and 5 auxiliary arc-shaped ribs between the main arc-shaped ribs of the outer ring and the main arc-shaped ribs of the middle ring Rib 5'; there are 3 auxiliary arc-shaped ribs 5' between the main arc-shaped rib in the middle ring and the main arc-shaped rib in the inner ring; There is an auxiliary arc-shaped reinforcing rib 5' between the ribs; there are 5 long-section radial reinforcing ribs 4, the inner ends of which are fixedly connected to the inner edge vertical ribs of the arc-shaped plate; vertical ribs on both sides to Between the adjacent long-segment radiating ribs 4 and between two adjacent long-segment reinforcing ribs 4, there is a middle-segment radiating rib 4', and the inner end of the middle-segment radiating rib 4' is connected to the inner ring. The main arc-shaped ribs are fixed; there is a short-section radiation reinforcement between the middle radiation reinforcement 4' and the side vertical reinforcements on both sides, and between the middle radiation reinforcement 4' and the long radiation reinforcement 4. Rib 4", the inner end of the short-section radiation rib 4" is affixed to the auxiliary arc-shaped rib 5' on the outside of the main arc-shaped rib in the middle ring.

Among them, the tops of the long-section radiating ribs 4 are all flush, and their heights are determined according to the position of the inner surface of the arc-shaped plate affixed to the bottom, and the range is 3-50mm; the middle radiating ribs 4' and the short radiating ribs The heights of the ribs 4" are the same, both being 3.5mm; the height of the main arc-shaped ribs 5 is 25mm, and the height of the auxiliary arc-shaped ribs 5' is 5mm.

Four 1/4-circle arc-shaped plates are fixedly connected to each other by bolts through the fixed installation holes on the side ribs on both sides to form a whole annular baffle plate.

The annular baffle of the utility model is designed as a split shape, and the integrally formed annular reinforcing ribs and radial reinforcing ribs on each 1/4 round arc-shaped plate can meet the bearing strength of the assembled annular baffle, especially It meets the load-bearing strength requirements of maintenance personnel and maintenance equipment when repairing blades; in addition, because a large amount of adhesive is used in the forming process of the blade, the cured adhesive will be released with the blade during use. Partial fall-off occurs due to vibration caused by rotation; therefore, the setting of the auxiliary annular reinforcing rib and the auxiliary radial reinforcing rib can effectively improve the impact resistance of the entire blade root baffle product against these falling adhesives.

As shown in Figure 2, Figure 3, Figure 5, and Figure 6, when the dome and the annular baffle are assembled, in order to ensure that the connection between the periphery of the dome and the inner edge of the annular baffle has a good seal, it can also be based on the For the height of the convex edge of the buckle, put a EPDM sealing strip with a width of 5mm and a height of less than 10mm in the sealing groove of the round cover in advance; After the edge 12 is fastened with the sealing groove in the boss 11 on the inner surface periphery of the round cover, the bolt connection hole 7 on the periphery of the round cover is fixedly connected with the embedded nut 2 inside the rib 12 of the arc-shaped plate; 4 pieces of 1 After the arc-shaped plates of /4 circle are respectively fixedly connected with the periphery of the round cover in the above-mentioned manner, the four arc-shaped plates of 1/4 circle are fixed and connected with each other by bolts through the fixed installation holes on the vertical ribs on both sides of the respective sides. Annular baffle; the annular baffle can also be installed first according to needs, and then the round cover is fixed on the inner edge of the annular baffle; finally, the annular baffle and the round cover are fixedly connected into one body (not shown in the figure), forming Root baffle plate of the present utility model.

The specifications and spacing of the bosses, sealing grooves, vertical ribs and reinforcing ribs in the above-mentioned round cover; the specifications and spacing of the convex ribs, vertical ribs and reinforcing ribs of the above-mentioned arc-shaped plate, as well as the size of the sealing strip used are not affected by the above values. According to the different specifications of the blades, it is necessary to select different round covers with different radii, different arc-shaped plates with inner diameters corresponding to the radius of the round covers, and different widths from the inner edge of the arc-shaped plates to the outer edge of the arc-shaped plates; If the size of the curved plate is large, the specifications of the curved plate will be increased accordingly. Therefore, the height of the vertical ribs and reinforcing ribs on the inner surface of the round cover and the inner surface of the curved plate will be increased accordingly, and the interval will be increased accordingly; otherwise, the height will be reduced. and reduce spacing; the radius of the dome of the present invention is within the range of 299-550mm, the radius from the center of the circle to the inner edge of the ring-shaped baffle is set within the range of 250-500mm relative to the radius of the dome, and the outer diameter of the ring-shaped baffle The width from the edge to the inner edge is in the range of 531-533mm.

The design, manufacture and installation principle of the utility model are:

In wind power generation equipment, the main body of each set of large composite wind power blades is basically composed of three blades, a set of generators, a set of nacelle covers, a tower and corresponding accessories. The roots of the three blades are connected to the nacelle cover, which is installed on the upper end of the tower.

The root baffle of the large-scale composite material wind power blade of the utility model is installed on the root of the blade, and the root baffle is designed as an assembled structure, that is, the complete annular baffle is designed as a 1/4 round arc plate, which is assembled with the round cover as a whole ; This assembled structure has low requirements for installation and construction conditions, is convenient to disassemble, and is conducive to batch transportation.

Both the 1/4 round arc-shaped plate and the dome cover are prepared by conventional glass fiber reinforced composite material molding method. When the 1/4 round arc-shaped plate is formed, metal nuts are used as embedded connectors and placed in the arc in advance. The vertical rib on the flange side of the inner edge of the shaped plate is integrally molded with the curved plate;

During installation, the outer edges of four 1/4-circle arc-shaped plates are bonded vertically to the inner surface of the root of the composite wind power blade by using epoxy resin adhesive; The 2 arc-shaped plates pass through the installation connection holes on the vertical ribs on both sides, and are assembled and connected by bolts, and the 4 1/4-circle arc-shaped plates are fixed into a ring-shaped baffle, and finally the round cover is placed on the ring-shaped baffle. In the center, fasten the sealing groove of the round cover with the rib on the outer surface of the inner edge of the annular baffle; at this time, the four embedded nuts between the inner side of the rib and the inner edge of the flange exactly correspond to the ring Bolt connection holes around the cover, through the connection of bolt connection holes, assemble 4 pieces of 1/4 round arc-shaped plates into a ring baffle, and then fix them through the embedded nuts on the inner edge of the ring baffle and the bolt connection holes around the round cover Connect and assemble into one.

When a wind turbine blade breaks down and needs to be repaired, the maintenance personnel need to climb the sleeve first, reach the position of the nacelle cover, open the hatch, and enter the interior of the nacelle cover, where the root of the blade is installed inside the nacelle cover; On the outer surface of the plate, that is, on the anti-skid layer of the annular baffle, the connection between the blade and the nacelle cover can be overhauled; the connection between the round cover and the annular baffle can also be opened, and the round cover can be removed. The disassembled dome can enter the interior of the blade for maintenance; due to the strength of the material of the dome and the annular baffle itself and the main reinforcement ribs on the inner surface, the entire strength can bear the weight of maintenance personnel and maintenance equipment, and meet the maximum load of 300 kg Require. Under the resistance of the anti-skid studs on the inner surface, it prevents maintenance personnel from slipping when standing and walking. Since the blade will use a large amount of adhesive during the molding process, the cured adhesive will vibrate with the rotation of the blade during the use of the blade, and some parts will fall off, so the auxiliary ring rib and auxiliary radiation reinforcement The provision of the ribs can effectively improve the impact resistance of the entire blade root baffle product against the peeled adhesive.

The outer surface of the annular baffle is equipped with a number of regularly arranged and scattered anti-skid nails, which constitute the anti-skid layer of the root baffle of the utility model; when the blade is maintained, the blade can be adjusted to an easy position according to the different maintenance parts. The state of maintenance; when it is necessary to maintain the joint between the blade root and the nacelle cover, the blade tip can be placed vertically on the ground, and the maintenance personnel stand on the anti-skid surface of the ring baffle for maintenance, because of the setting of the anti-skid structure, the The safety of the maintenance personnel during maintenance; if there is a fault inside the blade, the blade can be rotated to be parallel to the ground, and the maintenance personnel can open the round cover and enter the inside of the blade through the hole in the middle of the annular baffle for maintenance.

Claims (10)

1. A root baffle of a large composite material wind turbine blade, which is assembled from a dome and an annular baffle; wherein, the outer surface of the dome is planar; the inner edge of the outer surface of the annular baffle is in contact with the dome The periphery of the inner surface is relatively connected; the outer edge of the annular baffle is bonded vertically to the inner wall of the root of the large composite wind power blade; it is characterized in that: the thickness of the annular baffle is the same as that of the circular cover, and its thickness Both are 4-5mm; the inner surface of the circular cover and the inner surface of the annular baffle are respectively covered with vertical ribs and reinforcing ribs. 2. The root baffle according to claim 1, characterized in that: the annular baffle is assembled from four 1/4 round arc-shaped plates; the inner edge, outer edge, and two sides of the arc-shaped plate The side and the periphery of the inner surface of the round cover are respectively provided with flanges, and the width of the flanges is the same, which is 49-50mm; on the flange of the round cover, there are 4 evenly distributed along its periphery. Bolt connection holes; one embedded nut is respectively arranged on the inner edge flange of the four arc-shaped plates, and the position of the embedded nut corresponds to the position of the bolt connection hole on the flange edge of the round cover; the On the outer surface of the arc-shaped plate, a number of regularly arranged anti-slip nails are evenly distributed on the positions surrounded by the inner flange, the outer flange and the flanges on both sides. 3. The root baffle as claimed in claim 2, wherein: the periphery of the inner surface of the dome is a circle of vertical ribs; a circle of bosses are arranged at 27 mm from the vertical ribs to the center of the circle, and along the convex A sealing groove is provided on the upper surface of the platform, and the depth of the sealing groove is the same as the height of the boss; the bolt connection hole is located between the outer side of the boss and the vertical rib on the periphery of the round cover; the reinforcing rib Regularly distributed on the inner surface from the boss to the center of the circle; wherein, the reinforcing ribs are composed of a plurality of radial reinforcing ribs centered on the center of the circle, uniformly scattered outward and connected with the bosses around the round cover and multiple The circular reinforcing ribs with the same center, the same spacing and different radii are distributed across; among them, the distance between two adjacent circular reinforcing ribs is the same, and they all expand from the center of the circle to the periphery of the circular cover with an equal radius; the adjacent two circular reinforcing ribs The radial angles of the root radial ribs are the same. 4. The root baffle according to claim 3, characterized in that: the radial reinforcing ribs are divided into long-section radiation reinforcing ribs, middle radiation reinforcing ribs and short-section radiation reinforcing ribs; the annular reinforcing ribs are divided into main Annular reinforcing ribs and auxiliary annular reinforcing ribs; wherein, there are 3 main annular reinforcing ribs, which are distributed at intervals on the outer ring, middle ring and inner ring of the dome; The outer distance is 28mm; between the main ring rib of the outer ring and the main ring rib of the middle ring, between the main ring rib of the middle ring and the main ring rib of the inner ring, and between the main ring rib of the inner ring and the center of the circle. There are 3 auxiliary annular reinforcing ribs; there are 8 long-section radial reinforcing ribs, all of which are distributed in an equiangular manner from the center of the circle to the outside; in the middle of every two adjacent long-section radial reinforcing ribs, they are arranged in an equiangular manner There is one middle radiation reinforcing rib interposed, and the inner end of the middle radiation reinforcing rib is connected with the auxiliary annular reinforcing rib located in the inner ring; between the adjacent long radiation reinforcing rib and the middle radiation reinforcing rib The short section of radiating ribs is distributed in an angular manner, and the inner end of the short section of radiating ribs is connected with the auxiliary annular rib located between the middle ring rib and the inner ring rib. 5. The root baffle as claimed in claim 4, characterized in that: the height of the main annular rib of the outer ring is 36 mm, and the height of the main annular rib of the middle ring and the main annular rib of the inner ring are equal, both being 25 mm ; The height of the auxiliary annular rib is 5mm; the height of the long section of the radiating rib is 10mm, and the height of the middle section of the radiating rib and the short section of the radiating rib are the same, both being 3.5mm. 6. The root baffle according to claim 3, characterized in that: the inner flange of the arc-shaped plate is recessed from the outer surface of the arc-shaped plate to its inner surface, and the height of the recess is 16mm ; on its recessed inner edge flange edge 14mm from the inner edge of the arc-shaped plate is provided with the same convex rib with its radian, the width of this rib is the same as the groove width of the sealing groove on the described round cover, The height of the rib is smaller than the groove depth of the sealing groove, and a sealing strip is provided between the bottom end of the rib and the bottom end of the sealing groove; the embedded nut is located between the inner side of the rib and its inner edge. Between the inner edge of the blue edge. 7. The root baffle according to claim 6, characterized in that: the flanges on both sides of the arc-shaped plate are side flanges; wherein, the side flange adjacent to the side of the embedded nut The edge is recessed from the outer surface of the curved plate to the inner surface, and the height of the recess is 5mm; relative to the inner surface of the curved plate, the side flange and the inner flange are convex shape; the outer edge of the raised side flange and the inner side of the raised inner flange are provided with the vertical reinforcement perpendicular to the inner surface of the arc-shaped plate, which are respectively the raised side vertical rib and the inner Edge vertical ribs; the inner side of the side flange side away from the embedded nut and the inner side of the outer flange side are all provided with the vertical ribs vertically fixed to the inner surface of the arc-shaped plate, respectively Outer edge vertical ribs and side vertical ribs; the upper ends of the raised side vertical ribs, inner edge vertical ribs, outer edge vertical ribs and side vertical ribs are all in the same shape, and their thickness is 4mm; There are 3 evenly distributed reinforcing platforms on the side vertical bars and side vertical bars. The length x width x height of the reinforcement platforms are 35mm x 35mm x 6mm respectively. The fixed installation holes with interlinked ribs; the four arc-shaped plates are fixedly connected to each other by bolts through the fixed installation holes on the vertical ribs on both sides to form the annular baffle. 8. The root baffle as claimed in claim 7, characterized in that: the reinforcing ribs are arranged regularly between the inner vertical ribs, the outer vertical ribs and the side vertical ribs on both sides of the inner surface of the arc-shaped plate. between; the reinforcing ribs are formed by intersecting multiple radial reinforcing ribs at equal intervals and a plurality of arc-shaped reinforcing ribs with the same radian as the arc-shaped plate and arranged at equal intervals; wherein, two adjacent arc-shaped reinforcing ribs The upper and lower intervals are the same, and the left and right intervals of two adjacent radial ribs are the same, which gradually increase from the inner edge to the outer edge of the arc-shaped plate; the radial ribs are divided into long section radial ribs, middle section Radiation ribs and short-section radiation ribs, the outer ends of which are fixed to the outer edge of the arc-shaped plate; the arc-shaped ribs are divided into main arc-shaped ribs and auxiliary arc-shaped ribs, wherein, There are 3 main arc-shaped reinforcing ribs, which are distributed in the outer ring, middle ring and inner ring of the arc-shaped plate at intervals; there are 4 auxiliary ribs at intervals between the outer edge vertical rib and the outer ring main arc-shaped reinforcing rib Arc-shaped reinforcing ribs; 5 auxiliary arc-shaped reinforcing ribs are arranged at intervals between the main arc-shaped reinforcing ribs of the outer ring and the main arc-shaped reinforcing ribs of the middle ring; There are three auxiliary arc-shaped ribs at intervals between the arc-shaped ribs; one auxiliary arc-shaped rib is provided between the main arc-shaped ribs of the inner ring and the vertical ribs on the inner edge of the arc-shaped plate; There are 5 long-section radiation reinforcing ribs, the inner ends of which are fixedly connected to the inner edge vertical ribs of the arc-shaped plate; between the vertical ribs on both sides and the adjacent long-section radiation reinforcing ribs and the adjacent two long There is a middle radial reinforcing rib between the segmental reinforcing ribs, and the inner end of the middle radial reinforcing rib is fixedly connected with the main arc-shaped reinforcing rib of the inner ring; There is a short-section radiation reinforcement between the radiation reinforcement and the long-section radiation reinforcement, and the inner end of the short-section radiation reinforcement is fixedly connected to the auxiliary arc-shaped reinforcement outside the middle-section main arc-shaped reinforcement. 9. The root baffle according to claim 8, characterized in that: the height of the long-section radiation reinforcement is 3-50 mm; the height of the middle radiation reinforcement and the short radiation reinforcement are the same, both being 3.5 mm. mm; the height of the main arc-shaped reinforcing rib is 25mm, and the height of the auxiliary arc-shaped reinforcing rib is 5mm. 10. The root baffle according to any one of claims 2-9, characterized in that: the anti-skid studs are radially and circularly distributed; the distance between the anti-skid studs in two adjacent rows is the same, both are 30 -50mm; the distance between the anti-skid studs in two adjacent rows is the same, and gradually increases from the inner edge to the outer edge of the arc-shaped plate, which is 40-90mm; the radius of the round cover is 299-550mm; from the center of the circle The radius to the inner edge of the arc-shaped plate is set at 250-500 mm relative to the radius of the dome, and the width from the outer edge of the arc-shaped plate to its inner edge is 531-533 mm.

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