Skeleton type detachable segmented fan blade and processing method thereof

Abstract

The application provides a skeleton type detachable sectional fan blade and a processing method thereof, comprising a mounting seat, wherein the mounting seat is provided with a skeleton, the skeleton is provided with a plurality of blades, a connecting frame is arranged in the blade, the skeleton is provided with a guide rail, the connecting frame is matched with the guide rail, the blade is connected with the skeleton through the connecting frame and the guide rail, and the mounting seat is used for connecting a wind driven generator hub. In the production process, a large mold is not needed, and a small mold can be used to complete the processing and forming of the blade, the operation is simpler, and the cost is lower. The sectional detachable blade is adopted, when part or single blade is damaged, only the corresponding blade needs to be replaced, the whole fan blade does not need to be replaced, the replacement and maintenance cost is lower, and the replacement efficiency is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fan blades, in particular to a skeleton type detachable segmented fan blade and a processing method thereof. BACKGROUND

[0002] The fan blade is one of the core components of a wind turbine, accounting for about 15-20% of the total cost of the fan, and the design of the fan blade will directly affect the performance and efficiency of the fan.

[0003] In the production process of the fan blade, in order to ensure its performance, the fan blade is generally formed in an integral manner, that is, a large mold is first processed according to the design requirements, then the fan blade is formed through the mold, and finally the fan blade is transported to the site in an integral manner. In this process, a large mold is used for processing, which is costly. In addition, in the working process of the fan blade, the torque transmission depends on the fan blade, and in order to meet the working requirements, the processing requirements and cost of the fan blade are high.

[0004] When encountering harsh environments, the fan blade needs to be replaced in its entirety after being damaged, which is costly and inefficient. SUMMARY

[0005] The main purpose of the present application is to provide a skeleton type detachable segmented fan blade and a processing method thereof, which solves the problems of high processing cost of the existing fan blade and high replacement cost after partial damage.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is:

[0007] A skeleton type detachable segmented fan blade, comprising a mounting seat, the mounting seat being provided with a skeleton, the skeleton being provided with a plurality of blades;

[0008] The blade is provided with a connecting frame, the skeleton is provided with a guide rail, the connecting frame is matched with the guide rail, and the blade is connected with the skeleton through the connecting frame and the guide rail;

[0009] The mounting seat is used for connecting a hub of a wind turbine.

[0010] In the preferred scheme, the skeleton comprises a plurality of first keels connected with the mounting seat, the first keel is provided with a plurality of cross beams, the cross beam is provided with a second keel, one end of the second keel is connected with the mounting seat;

[0011] A reinforcing rod is arranged between adjacent first keels;

[0012] The cross beam is provided with a first connecting beam and a second connecting beam, and the first connecting beam and the second connecting beam are arranged in parallel;

[0013] A fixing rod is arranged between the first connecting beam and the second connecting beam;

[0014] The guide rail comprises a first connecting beam and a second connecting beam, and the first connecting beam and the second connecting beam are used for connecting the connecting frame.

[0015] In a preferred scheme, the connecting frame comprises a support plate arranged on the inner wall of the blade, and the support plate is provided with a first connecting rod and a second connecting rod.

[0016] The first connecting rod is provided with a first connecting seat connected with the first connecting beam, and the second connecting rod is provided with a second connecting seat connected with the second connecting beam.

[0017] A plurality of first reinforcing ribs are arranged between the first connecting rod and the support plate, and a plurality of second reinforcing ribs are arranged between the second connecting rod and the support plate.

[0018] In a preferred scheme, the first connecting beam and the second connecting beam each comprise a fixing plate connected with the cross beam, and the fixing plate is provided with a guide plate arranged perpendicularly to the fixing plate.

[0019] The guide plate is provided with a first positioning hole and a second positioning hole arranged in sequence at one end close to the first keel, and the second positioning hole is close to the end face, and the first positioning hole is provided with a guide groove at one side close to the second positioning hole.

[0020] The first connecting seat and the second connecting seat comprise a fixing plate, the top of the fixing plate is provided with a top block, and the top block is located at the top of the guide plate; the bottom of the fixing plate is provided with a bottom block, and the bottom block is located at the bottom of the guide plate.

[0021] The bottom of the top block is provided with two rollers, and the portions of the two rollers located outside the top block are located in the first positioning hole and the second positioning hole.

[0022] There is a gap between the top of the bottom block and the guide plate.

[0023] In a preferred scheme, the guide rail comprises a first keel.

[0024] The connecting frame comprises a connecting sleeve connected with the blade, the connecting sleeve is C-shaped, and the connecting sleeve is connected with the first keel.

[0025] The connecting sleeve and the first keel are fixed by screws.

[0026] A support rod is arranged between the connecting sleeve and the blade.

[0027] In a preferred scheme, the plurality of blades are combined into a plurality of sections of fan blades, the plurality of sections of fan blades are combined with the mounting seat and the framework to form a complete fan blade, and the same section of fan blade is composed of an upper blade and a lower blade.

[0028] The upper blade is located above the first keel, and the lower blade is located below the first keel.

[0029] The end portions of the upper blade and the lower blade are connected by a connecting mechanism.

[0030] Sealing pads are arranged between two adjacent upper blades and between two adjacent lower blades.

[0031] In a preferred embodiment, the connecting mechanism comprises a fixing sleeve arranged on the inner wall of the lower blade, and a rotating shaft is arranged in the fixing sleeve;

[0032] One end of the rotating shaft extends to the inside of the lower blade and is provided with a limiting rod, and the other end of the rotating shaft is provided with a knob;

[0033] The inner wall of the upper blade is provided with a limiting column, and the side of the limiting column away from the upper blade is provided with a limiting plate;

[0034] The side of the limiting rod is provided with a limiting groove, the limiting column is located in the limiting groove, and the limiting column is matched with the limiting groove; the limiting groove is an arc-shaped groove, and the center of the limiting groove is located on the axis of the rotating shaft.

[0035] A processing method of a skeleton type detachable segmented fan blade, comprising the following steps:

[0036] S1. According to the design size of the fan blade, the size of the skeleton and the size of each blade are obtained by modeling;

[0037] S2. According to the size of the skeleton, the keel and the beam constituting the skeleton are cut into corresponding sizes;

[0038] According to the size of the blade, a mold is processed;

[0039] S3. The cut keel and beam are welded to obtain a skeleton;

[0040] The mold is processed to obtain a blade;

[0041] S4. The inside of the blade is reinforced, the connecting structure is welded, and the surface of the blade is coated with glass fiber material;

[0042] S5. The blade is connected to the skeleton, and the gap between the blades is sealed;

[0043] The processing of the segmented fan blade is completed by the above method.

[0044] In a preferred embodiment, the keel and the beam are aluminum alloy I-beams, aluminum alloy H-beams and aluminum alloy T-beams;

[0045] In S3, it comprises:

[0046] S31. A plurality of keels are arranged in sequence according to the drawing;

[0047] S32. The beam is connected with the keel; a plurality of beams are uniformly and interval arranged, and are welded with the keel one by one, and the beam is perpendicular to the keel;

[0048] S33. Another keel is connected with the welded beam, and the connection is welded;

[0049] S34, flip the structure obtained in S33 by 180°, and then repeat the steps of S32-S33;

[0050] S35, weld the connecting piece, and obtain the framework.

[0051] In the preferred scheme, in S5, the blade connection is in a stepped form, and the blade connection is provided with a sealing gasket;

[0052] The blade connection is in close contact.

[0053] The present application provides a framework type detachable segmented fan blade and a processing method thereof, and has the following beneficial effects by adopting the above scheme:

[0054] 1. In the production process, a large mold is not needed, and a small mold can be used to complete the processing and forming of the blade, the operation is simpler, and the cost is lower.

[0055] 2. The segmented detachable blade is adopted, when part or single blade is damaged, only the corresponding blade needs to be replaced, the whole fan blade does not need to be replaced, the replacement and maintenance cost is lower, and the replacement efficiency is higher.

[0056] 3. The torque of the blade is transmitted to the wind turbine hub through the framework, instead of being directly transmitted through the blade, so that the processing requirement of the blade can be reduced, and the processing cost is lower.

[0057] 4. Compared with the prior art, the fan blade of the present application obtained by using the same quality requirement and material processing can cope with more extreme climate change, and has higher adaptability.

[0058] 5. The blade is simple to operate when connected with the framework, and the connection is stable. BRIEF DESCRIPTION OF DRAWINGS

[0059] The present application will be further described below in combination with the drawings and embodiments:

[0060] Figure 1 is a structural schematic view of a framework type detachable segmented fan blade of the present application;

[0061] Figure 2 is a front view of a framework type detachable segmented fan blade of the present application;

[0062] Figure 3 is an enlarged structural schematic view of the mounting seat;

[0063] Figure 4 is an enlarged structural schematic view of the framework close to the mounting seat;

[0064] Figure 5 is Figure 4 a front view;

[0065] Figure 6 is a side view of the connecting frame connecting the blades according to the present application;

[0066] Figure 7 is a side view of the connecting frame connecting different blades according to the present application;

[0067] Figure 8 is a side view of the first connecting seat and the second connecting seat according to the present application;

[0068] Figure 9 is an end view of the first connecting seat and the second connecting seat according to the present application;

[0069] Figure 10 is a structural schematic view of a skeleton type detachable segmented fan blade head according to the present application;

[0070] Figure 11 is a side view of the connecting sleeve according to the present application;

[0071] Figure 12 is a structural schematic view of the connecting mechanism when connected according to the present application;

[0072] Figure 13 is a structural schematic view of the connecting mechanism when connected according to the present application;

[0073] Figure 14 is a structural schematic view of the skeleton according to the present application;

[0074] Figure 15 is a structural schematic view of three connecting modes of the blades and the blades according to the present application.

[0075] In the drawings:

[0076] mounting seat 1, skeleton 2, first keel 201, crossbeam 202, second keel 203, first connecting beam 204, second connecting beam 205, fixed rod 206, reinforcing rod 207, fixed plate 211, guide plate 212, first positioning hole 213, second positioning hole 214, guide groove 215, blade 3, upper blade 301, lower blade 302, sealing gasket 303, connecting frame 4, supporting plate 401, first connecting rod 402, second connecting rod 403, first connecting seat 404, second connecting seat 405, first reinforcing rib 406, second reinforcing rib 407, fixed block 411, top block 412, bottom block 413, roller 414, supporting rod 501, connecting sleeve 502, screw 503, connecting mechanism 6, fixed sleeve 601, rotating shaft 602, knob 603, limiting rod 604, limiting column 605, limiting plate 606. DETAILED DESCRIPTION

[0077] Example 1:

[0078] As shown in Figure 1 , 2 and 3, a skeleton type detachable segmented fan blade comprises a mounting base 1, the mounting base 1 is provided with a skeleton 2, the skeleton 2 is provided with a plurality of blades 3;

[0079] A connecting frame 4 is welded in the blade 3, the inner side of the blade 3 is the back of the blade 3; the skeleton 2 is welded with a guide rail, the connecting frame 4 is matched with the guide rail, the blade 3 is connected with the skeleton 2 through the connecting frame 4 and the guide rail, and the skeleton 2 and the connecting frame 4 are preferably 6082-T6 high-strength aluminum alloy;

[0080] The mounting base 1 is used for connecting the wind turbine hub, and a plurality of screw rods are arranged on the side of the mounting base 1 away from the blade 3; the mounting base 1 is connected with the wind turbine hub in the existing manner.

[0081] The fan blade adopts a detachable segmented design, that is, the blade 3 adopts a front single-sided design, the back is provided with a connecting frame 4 matched with the skeleton 2 for connection, and a plurality of blades 3 and the skeleton 2 are combined to form a complete fan blade; in use, the torque generated by the fan blade under the influence of wind flow is transmitted to the skeleton 2 through the blade 3, and then transmitted to the wind turbine hub by the skeleton 2; in this process, the blade 3 only needs to bear the force directly acting on the wind flow, and the torque is transmitted through the skeleton 2, so that the load borne by the blade 3 is smaller, so that the blade with the same processing requirement and cost can cope with more extreme climate changes, and the processing cost of the fan blade can be reduced under the same use requirement; and because the blade does not need to transmit the torque, compared with the existing way of transmitting the torque through the whole blade, the thickness of the blade can be reduced, and the overall weight is lower.

[0082] Furthermore, the segmented blade 3 can be easily detached from the skeleton 2, and when one of the blades 3 is damaged, such as a single blade 3 is broken, only the damaged blade 3 needs to be replaced, without the need for overall replacement, so that the replacement efficiency is higher and the cost is lower.

[0083] In the process of connecting the blade 3, the side close to the mounting base 1 is preferably connected first.

[0084] In a further embodiment, as shown in Figure 3 , 4 , 5, 6, 10 and 14, the skeleton 2 comprises a plurality of first keels 201 connected with the mounting base 1, the first keel 201 is preferably H steel, the first keel 201 is provided with a plurality of cross beams 202, the cross beam 202 is preferably H steel and I-beam, the cross beam 202 is provided with a second keel 203, the second keel 203 is preferably H steel, and one end of the second keel 203 is connected with the mounting base 1;

[0085] As shown in Figure 14As shown, the length and position of the first keel 201, the second keel 203 and the crossbeam 202 are determined according to the shape of the whole fan blade, which ensures the strength and does not affect the installation of the blade 3.

[0086] In the position where the crossbeam 202 cannot be connected due to the limited space, the reinforcing rod 207 is welded between the adjacent first keels 201, and the reinforcing rod 207 is used for reinforcement.

[0087] The crossbeam 202 is provided with the first connecting beam 204 and the second connecting beam 205, and the first connecting beam 204 and the second connecting beam 205 are arranged in parallel to ensure the installation of the blade 3.

[0088] The fixing rod 206 is arranged between the first connecting beam 204 and the second connecting beam 205, and the fixing rod 206 is used for reinforcing the first connecting beam 204 and the second connecting beam 205.

[0089] The length of the first connecting beam 204 and the second connecting beam 205 is determined according to the cross-sectional shape of the fan blade at the position, and when the length of the first connecting beam 204 and the second connecting beam 205 is insufficient to connect the fixing rod 206, the fixing rod 206 is not connected, as shown in Figure 6 and 7 The position and size of the first connecting beam 204 and the second connecting beam 205 at different positions are shown.

[0090] The guide rail includes the first connecting beam 204 and the second connecting beam 205, and the first connecting beam 204 and the second connecting beam 205 are used to connect the connecting frame 4.

[0091] During the connection, the connecting frame 4 of the blade 3 moves along the first connecting beam 204 and the second connecting beam 205 until the blade 3 reaches the expected position, and the end of the first connecting beam 204 and the second connecting beam 205 can be provided with a positioning block to determine the position of the connecting frame 4.

[0092] In further embodiments, as shown in Figure 3 、 4 , 6 and 7, the connecting frame 4 includes a support plate 401 arranged on the inner wall of the blade 3, the shape of the support plate 401 is determined according to the shape of the inner wall of the blade 3 at the connection position, the blade 3 is connected with the support plate 401 by welding or adhesive bonding, and the support plate 401 is provided with the first connecting rod 402 and the second connecting rod 403.

[0093] The first connecting rod 402 is provided with a first connecting seat 404 connected with the first connecting beam 204, and the second connecting rod 403 is provided with a second connecting seat 405 connected with the second connecting rod 403. The first connecting seat 404 and the second connecting seat 405 are provided with openings, which are matched with the first connecting beam 204 and the second connecting beam 205. The number of the first connecting seat 404 and the second connecting seat 405 is determined according to the length of the first connecting beam 204 and the second connecting beam 205. The distance between two adjacent first connecting seats 404 is not less than 2 cm.

[0094] A plurality of first reinforcing ribs 406 are arranged between the first connecting rod 402 and the support plate 401, and a plurality of second reinforcing ribs 407 are arranged between the second connecting rod 403 and the support plate 401. The first reinforcing rib 406 and the second reinforcing rib 407 are used for fixing the support plate 401 to the first connecting rod 402 and the second connecting rod 403.

[0095] In use, the openings of the first connecting seat 404 and the second connecting seat 405 of the blade 3 are aligned with the first connecting rod 402 and the second connecting rod 403, and then the blade 3 is slid along the direction of the first connecting rod 402 and the second connecting rod 403, so that the first connecting seat 404 and the second connecting seat 405 slide along the first connecting rod 402 and the second connecting rod 403 until they are positioned at the position of the positioning block. The connection of the blade 3 is completed, and vice versa. The operation is simple and convenient for connecting the blade 3.

[0096] Embodiment 2:

[0097] As shown in Figure 6 , 7 , 8 and 9, the first connecting beam 204 and the second connecting beam 205 each include a fixed plate 211 connected with the cross beam 202. The fixed plate 211 is provided with a guide plate 212, which is perpendicular to the fixed plate 211. The cross section of the fixed plate 211 and the guide plate 212 is preferably T-shaped or L-shaped.

[0098] The guide plate 212 is provided with a first positioning hole 213 and a second positioning hole 214 in sequence at one end close to the first keel 201. The second positioning hole 214 is close to the end face, and the first positioning hole 213 is provided with a guide groove 215 at one side close to the second positioning hole 214.

[0099] The first connecting seat 404 and the second connecting seat 405 include a fixed block 411. The top of the fixed block 411 is provided with a top block 412, which is located at the top of the guide plate 212. The bottom of the fixed block 411 is provided with a bottom block 413, which is located at the bottom of the guide plate 212. The combination of the fixed block 411, the top block 412 and the bottom block 413 is U-shaped.

[0100] The bottom of the top block 412 is provided with two rollers 414, and the portions of the two rollers 414 located outside the top block 412 are located in the first positioning hole 213 and the second positioning hole 214;

[0101] As Figure 9 , there is a gap between the top of the bottom block 413 and the guide plate 212, and the width of the gap is not less than the thickness of the portion of the roller 414 extending out of the bottom block 413.

[0102] When the blade 3 is installed, the guide plate 212 is located between the top block 412 and the bottom block 413, and the two rollers 414 are located on the top of the guide plate 212, and then in the process of moving the blade 3 to drive the first connecting seat 404 and the second connecting seat 405 to move along the guide plate 212, the sliding can be facilitated by the assistance of the rollers 414, the smoothness of the sliding is increased, and the convenience of disassembly is increased; after sliding to the end, the two rollers 414 respectively enter the first positioning hole 213 and the second positioning hole 214, and the rollers 414 cannot be moved at will due to the limitation of the first positioning hole 213 and the second positioning hole 214, thereby avoiding the first connecting seat 404 and the second connecting seat 405 from moving at will, ensuring the stability after connection, and vice versa, that is, disassembly, lifting the blade 3 slightly to make the rollers 414 away from the first positioning hole 213 and the second positioning hole 214, and then sliding out; the first positioning hole 213 and the second positioning hole 214 also play a role in positioning.

[0103] Embodiment 3:

[0104] As Figure 10 and 11 shown, when the head space of the fan blade is limited and there is no space to use the first connecting seat 404, the second connecting seat 405, the first connecting beam 204 and the second connecting beam 205, the guide rail includes the first keel 201;

[0105] The connecting frame 4 includes a plurality of connecting sleeves 502 connected with the blade 3, the connecting sleeve 502 is C-shaped, and the connecting sleeve 502 is connected with the first keel 201;

[0106] The connecting sleeve 502 and the first keel 201 are fixed by a screw 503;

[0107] A support rod 501 is arranged between the connecting sleeve 502 and the blade 3.

[0108] When connecting, the connecting sleeve 502 is aligned with the first keel 201 as Figure 11 , then the blade 3 is moved in the direction of the first keel 201, and after installation, the screw 503 is tightened for fixation as Figure 10 shown, and the installation is completed, which is simple in operation and convenient for the connection of the head blade 3 of the segmented fan blade.

[0109] Embodiment 4:

[0110] As Figure 1 , 3 , 6, 7, 10, 11, 12 and 13, a plurality of blades 3 are combined into a plurality of fan blades, and the plurality of fan blades are combined with the mounting seat 1 and the framework 2 to form a complete fan blade, and the same fan blade is composed of an upper blade 301 and a lower blade 302;

[0111] The upper blade 301 is located above the first keel 201, and the lower blade 302 is located below the first keel 201.

[0112] The end of the upper blade 301 and the lower blade 302 is connected by a connecting mechanism 6; the end face of the connecting position is provided with a sealing rubber gasket for sealing.

[0113] In a preferred embodiment, the connecting mechanism 6 includes a fixed sleeve 601 provided on the inner wall of the lower blade 302, and a rotating shaft 602 is arranged in the fixed sleeve 601.

[0114] One end of the rotating shaft 602 extends into the interior of the lower blade 302 and is provided with a limiting rod 604, and the other end of the rotating shaft 602 is provided with a knob 603.

[0115] The inner wall of the upper blade 301 is provided with a limiting column 605, and the side of the limiting column 605 away from the upper blade 301 is provided with a limiting plate 606; after connection, the position of the limiting rod 604 is limited by the limiting plate 606, and in Figure 12 , the limiting rod 604 is limited to move left and right, and in Figure 13 , the limiting rod 604 can be limited to move downward, thereby ensuring the stability after connection.

[0116] The side of the limiting rod 604 is provided with a limiting groove, the limiting column 605 is located in the limiting groove, and the limiting column 605 is matched with the limiting groove; the limiting groove is an arc-shaped groove, and the center of the limiting groove is located on the axis of the rotating shaft 602.

[0117] After the upper blade 301 and the lower blade 302 of the same section are connected with the framework 2, the knob 603 is rotated to drive the rotating shaft 602 and the limiting rod 604 in turn, until the limiting rod 604 is rotated to the position of the limiting column 605, so that the limiting column 605 enters the interior of the limiting groove, thereby completing the connection and fixation of the connection position of the upper blade 301 and the lower blade 302; conversely, it can be disassembled, which is simple to operate, convenient for connection and reinforcement, and also convenient for replacement.

[0118] In a further embodiment, as shown in Figure 15 , a sealing gasket 303 is arranged between adjacent two upper blades 301 and between adjacent two lower blades 302, and specifically:

[0119] The connecting position of the adjacent blades 3 can be as Figure 15As shown in a1, the connecting position is in L-step type, and a sealing gasket 303 is arranged on the connecting surface;

[0120] The connecting position at the adjacent blade 3 can also be as shown in a2, the connecting surface is in plane, and a sealing groove is arranged on the side close to the surface, and the sealing gasket 303 is connected in the sealing groove through adhesive; Figure 15 As shown in a2, the connecting surface at the adjacent blade 3 is in plane, and a sealing groove is arranged on the side close to the surface, and the sealing gasket 303 is connected in the sealing groove through adhesive;

[0121] The connecting position at the adjacent blade 3 can also be as shown in a2, the connecting surface is in plane, and a sealing groove is arranged on the side close to the surface, and the sealing gasket 303 is connected in the sealing groove through adhesive; Figure 15 As shown in a3, the connecting surface is approximately S-shaped.

[0122] Further, the upper blade 301 and the lower blade 302 can be connected through a screw, and the screw is screwed into the upper blade 301 from the lower blade 302 to complete the fixation.

[0123] Embodiment 5:

[0124] A processing method of a skeleton type detachable segmented fan blade, comprising the following steps:

[0125] S1, modeling to obtain the size of the skeleton and the size of each blade according to the design size of the fan blade;

[0126] S2, cutting the keel and the beam constituting the skeleton into corresponding sizes according to the size of the skeleton;

[0127] Processing a mold according to the size of the blade;

[0128] S3, welding the cut keel and beam to obtain the skeleton;

[0129] Processing a mold to obtain the blade;

[0130] S4, reinforcing the inner side of the blade, welding the connecting structure, and smearing the surface of the blade with glass fiber material;

[0131] S5, connecting the blade to the skeleton, and sealing the gap between the blades;

[0132] The segmented fan blade is processed through the above method.

[0133] The whole processing process is simple to operate and does not have complex processing procedures, and large molds are not needed during the processing of the blade. The fan blade is divided into multiple segments for processing, and small molds can be used to achieve the processing, so that the processing cost is lower and the efficiency is higher.

[0134] In the preferred scheme, the keel and the beam are aluminum alloy I-beam, aluminum alloy H-beam and aluminum alloy T-beam;

[0135] In S3, it includes:

[0136] S31, arrange the keels according to the drawing;

[0137] S32, connect the beams with the keels; the beams are evenly spaced and welded with the keels, and the beams are perpendicular to the keels;

[0138] S33, connect another keel with the welded beam, and weld the connection;

[0139] S34, flip the structure obtained in S33 by 180°, and then repeat the steps of S32-S33;

[0140] S35, weld the connecting piece to obtain the framework.

[0141] The framework is composed of commonly used aluminum alloy I-beams, aluminum alloy H-beams and aluminum alloy T-beam structures, without complex structures, so that the processing cost of the keel is lower, and the aluminum alloy is preferably 6082-T6 high-strength aluminum alloy.

[0142] In the preferred scheme, in S5, the blade connection is in a stepped shape, and the blade connection is provided with a sealing gasket;

[0143] The blade connection is in close contact, and the structure of the blade connection is sealed, which can ensure daily use, and does not affect disassembly when replacing the blade.

[0144] The above embodiments are only preferred technical solutions of the present application, and should not be regarded as a limitation of the present application, and the protection scope of the present application should be the technical solutions recited in the claims, including the equivalent replacement schemes of the technical features recited in the claims. That is, within this range, equivalent replacement improvements are also within the protection scope of the present application.

Claims

1. A skeletonized demountable segmented fan blade characterized by: The mounting seat (1) is provided with a framework (2), and the framework (2) is provided with a plurality of blades (3); The blade (3) is provided with a connecting frame (4), the framework (2) is provided with a guide rail, the connecting frame (4) is matched with the guide rail, and the blade (3) is connected with the framework (2) through the connecting frame (4) and the guide rail; The mounting seat (1) is used for connecting a wind turbine hub; The framework (2) comprises a plurality of first keels (201) connected with the mounting seat (1), the first keel (201) is provided with a plurality of cross beams (202), the cross beam (202) is provided with a second keel (203), and one end of the second keel (203) is connected with the mounting seat (1); A reinforcing rod (207) is arranged between adjacent first keels (201); The cross beam (202) is provided with a first connecting beam (204) and a second connecting beam (205), and the first connecting beam (204) and the second connecting beam (205) are arranged in parallel; A fixing rod (206) is arranged between the first connecting beam (204) and the second connecting beam (205); The guide rail comprises the first connecting beam (204) and the second connecting beam (205), and the first connecting beam (204) and the second connecting beam (205) are used for connecting the connecting frame (4); The connecting frame (4) comprises a supporting plate (401) arranged on an inner wall of the blade (3), and the supporting plate (401) is provided with a first connecting rod (402) and a second connecting rod (403); The first connecting rod (402) is provided with a first connecting seat (404) connected with the first connecting beam (204), and the second connecting rod (403) is provided with a second connecting seat (405) connected with the second connecting rod (403); A plurality of first reinforcing ribs (406) are arranged between the first connecting rod (402) and the supporting plate (401), and a plurality of second reinforcing ribs (407) are arranged between the second connecting rod (403) and the supporting plate (401); The first connecting beam (204) and the second connecting beam (205) each comprise a fixing plate (211) connected with the cross beam (202), and the fixing plate (211) is provided with a guide plate (212) arranged perpendicularly to the fixing plate (211); One end of the guide plate (212) close to the first keel (201) is sequentially provided with a first positioning hole (213) and a second positioning hole (214), the second positioning hole (214) is close to an end face, and a guide groove (215) is arranged on one side of the first positioning hole (213) close to the second positioning hole (214); The first connecting seat (404) and the second connecting seat (405) comprise a fixing block (411), a top block (412) is arranged on a top portion of the fixing block (411), and the top block (412) is located on a top portion of the guide plate (212); a bottom block (413) is arranged on a bottom portion of the fixing block (411), and the bottom block (413) is located on a bottom portion of the guide plate (212); Two roller cylinders (414) are arranged on a bottom portion of the top block (412), and portions of the two roller cylinders (414) located outside the top block (412) are located in the first positioning hole (213) and the second positioning hole (214); There is a gap between a top portion of the bottom block (413) and the guide plate (212).

2. The modular segmented fan blade of claim 1, wherein: The guide rail comprises the first keel (201). The connecting frame (4) comprises a connecting sleeve (502) connected with the blade (3), the connecting sleeve (502) is C-shaped, and the connecting sleeve (502) is connected with the first keel (201); The connecting sleeve (502) and the first keel (201) are fixed through a screw (503); A supporting rod (501) is arranged between the connecting sleeve (502) and the blade (3).

3. The modular segmented fan blade of claim 1, wherein: The plurality of blades (3) are combined into a plurality of fan blades, and the plurality of fan blades and the mounting seat (1) and the framework (2) are combined into a complete fan blade, and the same fan blade is composed of an upper blade (301) and a lower blade (302); The upper blade (301) is located above the first keel (201), and the lower blade (302) is located below the first keel (201); The end portions of the upper blade (301) and the lower blade (302) are connected through a connecting mechanism (6); Sealing pads (303) are arranged between the two adjacent upper blades (301) and the two adjacent lower blades (302).

4. The modular stave fan blade of claim 3, wherein: The connecting mechanism (6) comprises a fixing sleeve (601) arranged on the inner wall of the lower blade (302), and a rotating shaft (602) is arranged in the fixing sleeve (601); One end of the rotating shaft (602) extends into the lower blade (302) and is provided with a limiting rod (604), and the other end of the rotating shaft (602) is provided with a knob (603); The inner wall of the upper blade (301) is provided with a limiting column (605), and the side of the limiting column (605) away from the upper blade (301) is provided with a limiting plate (606); The side surface of the limiting rod (604) is provided with a limiting groove, the limiting column (605) is located in the limiting groove, and the limiting column (605) is matched with the limiting groove; the limiting groove is an arc-shaped groove, and the center of the limiting groove is located on the axis of the rotating shaft (602).

5. The method of claim 1-4, wherein the method is characterized by The method comprises the following steps: S1, modeling to obtain the size of the framework and the size of each blade according to the design size of the fan blade; S2, cutting the keels and beams constituting the framework into corresponding sizes according to the size of the framework; According to the size of the blade, a mold is processed; S3, welding the cut keels and beams to obtain the framework; The mold is processed to obtain the blade; S4, reinforcing the inner side of the blade, welding the connecting structure, and smearing the surface of the blade with glass fiber material; The segmented fan blade is processed through the above method. The keel and the beam are aluminum alloy I-beam, aluminum alloy H-beam and aluminum alloy T-beam; 6. The method of claim 5, wherein the method further comprises: In S3, it comprises: ​ S31, arranging a plurality of keels in sequence according to the drawing; S32, connecting the beam with the keel; a plurality of beams are uniformly and interval arranged, and are welded with the keel one by one, and the beam is perpendicular to the keel; S33, connecting another keel with the welded beam, and welding the connecting part; S34, turning over the structure obtained in S33 by 180°, and then repeating the steps of S32-S33; S35, welding the connecting part to obtain the framework. In S5, the blade connection part is in a stepped type, and the blade connection part is provided with a sealing pad; 7. The skeleton type detachable sectional fan blade according to claim 6, wherein: the blade is formed by connecting the plurality of sections in a longitudinal direction of the blade. The blade connection part is in close contact. ​

Images