Blade and wind turbine generator set including the blade

Abstract

The present invention provides a blade and a wind turbine generator set including the blade, wherein the blade includes: a first blade segment, one side of which is provided with a plurality of first connecting members; a second blade segment, a side opposite to the first blade segment, on which a plurality of second connecting members are provided, wherein the number and position of the plurality of first connecting members and the plurality of second connecting members correspond to each other, and can be detachably connected to each other, and each of the plurality of first connecting members and the second connecting members includes an embedded portion embedded in the blade structural layer of the blade and a protruding portion protruding into the inner cavity of the blade. According to an embodiment of the present invention, the assembly operation between blade segments can be more convenient and reliable, and can be repaired and replaced when quality problems occur, thereby improving structural stability and safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and in particular relates to a segmented blade including a connecting member and a wind power generator set including the blade. Background Art

[0002] With the fierce competition in the market, the cost pressure is increasing. In order to reduce the cost per kilowatt-hour, the capacity of a single wind turbine is getting larger and larger, and the blades are also designed to be larger and larger. The transportation requirements of large blades are getting higher and higher, and the impact on the overall unit cost is also increasing. In order to solve the problem of large blade transportation, the blades need to be manufactured in sections and then assembled at the project site. Segmented blades not only require the structural strength of the connection to be achieved technically, but also require the connection process to be stable, fast, and maintainable. Achieving high-quality and efficient segmented connection is a realistic need, otherwise unstable quality and slow processes will become a disaster for all parties involved. Summary of the invention

[0003] One of the main purposes of the present invention is to provide a segmented blade and a wind turbine generator set including the segmented blade, which is more convenient and reliable to assemble and can be repaired and replaced when quality problems occur.

[0004] In view of the above-mentioned invention object, the present invention provides the following technical solutions:

[0005] According to one aspect of the present invention, a blade is provided, which may include: a first blade segment, one side of which is provided with a plurality of first connecting members; a second blade segment, a side opposite to the first blade segment, on which is provided a plurality of second connecting members, wherein the number and positions of the plurality of first connecting members and the plurality of second connecting members correspond to each other, and can be detachably connected to each other, and each of the plurality of first connecting members and the second connecting members includes an embedded portion embedded in a blade structural layer of the blade and a protruding portion protruding into an inner cavity of the blade.

[0006] Each of the plurality of first connectors and the plurality of second connectors further includes: a positioning hole formed in the embedded portion; and a connecting hole formed in the protruding portion, wherein both the positioning hole and the connecting hole extend along a length direction of the blade.

[0007] The length of the positioning hole may be greater than that of the connecting hole, and a portion of the positioning hole away from a side where the first blade segment and the second blade segment contact each other is provided with an internal thread, and the rest of the portion is a flat inner surface.

[0008] The blade may further include a positioning pin shaft, one end of which is formed with an external thread that cooperates with the internal thread of the positioning hole, wherein L1+L2<L3≤L1+2L2, wherein L1 is the length of the positioning hole provided with the internal thread, L2 is the length of the portion of the positioning hole having a flat inner surface, L3 is the length of the positioning pin shaft, and the length of the portion of the positioning pin shaft formed with the external thread is L1.

[0009] The blade may further include a reinforcement layer laid on an inner surface of the blade in a region where the embedded portion is provided, wherein an area of ​​the reinforcement layer is larger than an area of ​​the embedded portion projected onto the inner surface of the blade.

[0010] The reinforcement layer may be a glass fiber reinforced plastic reinforcement layer.

[0011] A groove structure may be formed on an outer surface of the buried portion.

[0012] A gasket and / or a sealing member may be provided between the butted end surfaces of the first connecting member and the second connecting member.

[0013] The multiple first connectors and the multiple second connectors can be arranged on the main beam area and the trailing edge beam area of ​​the pressure side and the suction side of the blade, wherein the first connector and the second connector located in the main beam area can be respectively arranged on both sides of the web of the blade.

[0014] The fastening member may pass through the first connecting piece and the second connecting piece corresponding to each other to connect the first blade segment and the second blade segment to each other, wherein a displacement sensor is disposed on or near the fastening member.

[0015] According to another aspect of the present invention, a wind turbine generator set is provided. The wind turbine generator set may include the blade as described above.

[0016] According to an embodiment of the present invention, the above-mentioned connection structure can make the manufacture of segmented blades and the assembly operations at the project site more convenient and reliable, and at the same time, no auxiliary docking tooling is required to ensure the correctness of the blade shape after the segmented blades are connected, which ensures product quality while significantly reducing the segmented docking assembly cost.

[0017] According to the embodiments of the present invention, through the assembled segmented connection structure of the present invention, the segmented blades can be repaired and replaced when quality problems occur, thereby reducing quality costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or other objects and advantages of the present invention will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a structural schematic diagram showing a state where two blade segments according to the present invention are spliced ​​together;

[0020] Figure 2 is a schematic diagram showing the structure of a first blade segment according to the present invention;

[0021] Figure 3 is a cross-sectional schematic diagram of a structure in which a first connecting member and a second connecting member are connected to each other;

[0022] Figure 4 It is a schematic diagram of the structure of the positioning pin shaft;

[0023] Figure 5 Schematic diagram of the structure of the first connecting member.

[0024] Description of reference numerals:

[0025] 100-first blade segment; 110-pressure surface; blade structure layer 111; reinforcement layer 112; 120-suction surface; 130-web; 200-second blade segment; 300-first connecting member; 400-second connecting member; 310-positioning hole; 320-connecting hole; 370-buried part; 380-protruding part; 381-connecting plate; 382-reinforcement rib; 500-fastening member; 10-seal; 60-gasket; 70-nut; 80-bolt; 90-positioning pin. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the implementation of the present invention is limited to the embodiments described herein. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0027] Segmented blades need to be supported by a reliable connection method. In the prior art, in order to achieve the connection of segmented blades, the main methods used are the following: 1. FRP infusion connection: it adopts the commonly used method of repairing the FRP layer of blades, lays a glass fiber layer on the connecting section, and then uses the FRP vacuum forming process to infuse and solidify, so as to connect the two separated blades to achieve docking; 2. FRP preformed parts are glued, plug-in connected or auxiliary bolted: FRP rods or FRP sheets are embedded at one end of the segmented surface, and corresponding installation holes are reserved at the other end, and bolts or adhesives are used to achieve docking; 3. Mechanical connection: holes are punched or metal parts are embedded on one side of the segmented blade, and holes are opened on the other side to install nuts, and bolts are used for docking.

[0028] However, the FRP pouring connection method is affected by the project site conditions and its operation requires a lot of manpower, which cannot guarantee the docking quality well. It also lacks efficiency and is difficult to meet the delivery requirements. For the method of gluing, plug-in connection or auxiliary bolt connection of FRP preforms, due to the characteristics of FRP itself, the reinforcing fibers are disconnected at the segment. Reliability is problematic when only connecting glue or a few bolts are driven on the plug board. It is difficult to ensure the safety of connecting blades during the life cycle of the wind turbine. At the same time, if a connection failure occurs, the maintainability is also poor. In the case of mechanical connection, more bolts, embedded screw sleeves or auxiliary parts are usually used, which significantly increases the weight and has a great impact on the performance of the whole machine, resulting in an increase in blade weight and the cost of the whole machine.

[0029] In order to overcome the above problems existing in the prior art, the present invention provides a reliable connection structure. Figure 1 and Figure 2 The specific structure of the blade having the connection structure according to the embodiment of the present invention is described.

[0030] According to an embodiment of the present invention, a blade may include: a first blade segment 100, one side of which may be provided with a plurality of first connecting members 300; a second blade segment 200, a side of which opposite to the first blade segment 100 may be provided with a plurality of second connecting members 400, the number and positions of the plurality of first connecting members 300 and the plurality of second connecting members 400 correspond to each other, and can be detachably connected to each other, so that the first blade segment 100 and the second blade segment can be connected to each other.

[0031] It should be noted that Figure 1 and Figure 2 The first blade segment 100 and the second blade segment 200 in the embodiment may correspond to the blade segment on the blade root side and the blade segment on the blade tip side, respectively, that is, Figure 1 and Figure 2 The two blade segments shown in the figure may be parts of corresponding blade segments, so as to clearly show the connection structure between the two blade segments. However, the present invention is not limited thereto, and the entire blade may also be divided into more than two blade segments. In this case, two adjacent blade segments may be connected using the connection structure according to the embodiment of the present invention.

[0032] Combine the following Figures 1 to 5 A connection structure between adjacent blade segments (eg, the first blade segment 100 and the second blade segment 200 ) is described.

[0033] Each of the first connector 300 and the second connector 400 may have the same structure, and thus the structure of the first connector 300 will be described as an example.

[0034] The first connector 300 may include an embedded portion 370 embedded in the blade structure layer 111 of the blade and a protruding portion 380 protruding into the inner cavity of the blade. The embedded portion 370 and the protruding portion 380 are formed integrally, and the embedded portion 370 is pre-embedded in the blade structure layer 111. For example, the embedded portion 370 may be pre-embedded in the blade structure layer 111 by integral injection molding with the corresponding shell when manufacturing the corresponding blade segment. By forming the embedded portion 370 and the protruding portion 380 integrally, the structural strength of the connection can be improved and the weight of the connector can be reduced.

[0035] According to an embodiment of the present invention, the first connector 300 may further include a positioning hole 310 formed in the embedded portion 370 and a connecting hole 320 formed in the protruding portion 380, and the positioning hole 310 and the connecting hole 320 may both extend along the length direction of the blade. The positioning hole 310 may penetrate the embedded portion 370 in the length direction of the blade, and the connecting hole 320 may penetrate the protruding portion 380 in the length direction of the blade.

[0036] However, since the embedded portion 370 is located in the blade structure layer 111, the positioning hole 310 may be exposed only from the side of the first blade segment 100 facing the second blade segment 200, and the positioning pin 90 may be inserted into the positioning hole 310 from the side of the first blade segment 100. However, the present invention is not limited thereto, and the positioning hole 310 may not penetrate the embedded portion 370, that is, the positioning hole 310 may be open only on the side of the first blade segment 100 facing the second blade segment 200.

[0037] The length of the positioning hole 310 may be greater than the length of the connecting hole 320, and the portion of the positioning hole 310 away from the side where the first blade segment 100 and the second blade segment 200 contact each other may be provided with an internal thread, and the remaining portion may be a flat inner surface. One end of the positioning pin 90 may be formed with an external thread that matches the internal thread of the positioning hole 310, and the length of the positioning pin 90 is greater than the length of the positioning hole 310, so that after the positioning pin 90 is inserted into the positioning hole 310, a portion of it is still exposed to the outside of the positioning hole 310, so that when the first blade segment 100 and the second blade segment 200 are connected to each other, the exposed portion of the positioning pin 90 can be inserted into the corresponding positioning hole of the second connecting member 400 to achieve positioning between the first blade segment 100 and the second blade segment 200.

[0038] In addition, the first connector 300 and the second connector 400 may be connected to each other by passing a fastening member 500 (eg, including a bolt 80 and a nut 70 ) through the connection hole 320 of the first connector 300 and the connection hole of the second connector 400 .

[0039] In this way, the fastening member 500 can bear the axial load of the blade, and the positioning pin shaft 90 can play the role of positioning and shear resistance.

[0040] According to the embodiment of the present invention, a plurality of first connectors 300 and a plurality of second connectors 400 are arranged on the main beam region and the trailing edge beam region of the pressure surface 110 and the suction surface 120 of the blade, and the first connectors 300 and the second connectors 400 located in the main beam region are respectively arranged on both sides of the web 130 of the blade. Since the main beam and the web 130 of the blade are structures that support the entire blade, the structural strength at the connection position can be ensured by arranging the plurality of first connectors 300 and the plurality of connectors 400 in the main beam region of the blade.

[0041] According to an embodiment of the present invention, Figure 4 As shown, assuming that the length of the positioning hole 310 provided with the internal thread is L1, and the length of the portion of the positioning hole 310 having the flat inner surface is L2, that is, the total length of the positioning hole 310 is L1+L2, then the length L3 of the positioning pin shaft 90 satisfies the expression L1+L2<L3≤L1+2L2, wherein the length of the portion of the positioning pin shaft 90 provided with the external thread is the same as the length of the internal thread in the positioning hole 310, that is, both are L1, as shown in FIG. Figure 3 and Figure 4 In addition, Figure 4 , the situation when the positioning pin shaft 90 has the maximum length is shown.

[0042] Since the second connector 400 has the same structure as the first connector 300 and the first connector 300 and the second connector 400 are symmetrical with respect to the interface where the first blade segment 100 and the second blade segment 200 contact each other, the positioning hole of the second connector 400 has an internal thread on the side away from the above interface and a flat inner surface on the side close to the interface. In this case, when the threaded end of the positioning pin 90 is rotated to the first blade segment 100, the portion of the positioning pin 90 exposed to the outside of the first blade segment 100 will be inserted into the positioning hole of the second connector 400. Since the length L3 of the positioning pin 90 satisfies the condition of L1+L2<L3≤L1+2L2, the positioning pin 90 will only be inserted into the portion of the positioning hole of the second connector 400 having a flat inner surface, and will not interfere with the internal thread portion of the positioning hole of the second connector 400.

[0043] Since the second connecting member 400 and the first connecting member 300 have the same structure, no matter the threaded section of the positioning pin shaft 90 is rotated to the first blade segment 100 or the second blade segment 200 , the positioning function can be smoothly achieved.

[0044] If the length L3 of the positioning pin 90 is less than L1+L2, the positioning pin 90 cannot be exposed from one side of the positioning hole after being installed in the first connector 300 or the second connector 400, thereby failing to position the first blade segment 100 and the second blade segment 200. If the length L3 of the positioning pin 90 is greater than L1+L2, when the portion of the positioning pin 90 exposed from the positioning hole of the first connector 300 or the second connector 400 is inserted into the positioning hole of the other connector, the exposed portion will interfere with the threaded area of ​​the positioning hole, resulting in the first blade segment 100 and the second blade segment 200 failing to contact and thus failing to connect.

[0045] It should be noted that the above expression (L1+L2<L3≤L1+2L2) is defined based on the premise that the overall outer diameter of the positioning pin shaft 90 is substantially the same as the inner diameter of the positioning hole. However, the present invention is not limited to this. For example, the positioning pin shaft 90 may also be a pin shaft structure with a variable diameter. In this case, the outer diameter of the length L3 of the positioning pin shaft 90 within the range of L1+L2<L3≤L1+2L2 is substantially the same, and the length exceeding this part may have a smaller diameter. In this way, even if the part exceeding the above range is inserted into the threaded area of ​​the positioning hole, it will not interfere with the positioning hole, and the positioning pin shaft 90 can also achieve the positioning function.

[0046] According to an embodiment of the present invention, the positioning holes of the first connector 300 and the second connector 400 may also have different structures. For example, the positioning holes of the first connector 300 and the second connector 400 may be arranged as a parent-child coupling structure. Figure 4 The left side of the positioning pin shaft 90 (the part marked with L1 and L2) has a shape that matches the structure on the right side, and the positioning hole of the second connecting member 400 has a shape that matches the structure on the right side (that is, the connecting hole of the second connecting member 400 may not pass through the buried part), but the present invention is not limited to the above situation, and the structures of the first connecting member 300 and the second connecting member 400 may also be interchangeable.

[0047] According to an embodiment of the present invention, Figures 1 to 3 As shown in , the blade may further include a reinforcement layer 112 laid on the inner surface of the region of the blade where the embedded portion 370 is provided. The reinforcement layer 112 may be a glass fiber reinforced plastic reinforcement layer to enhance the structural strength of the region where the connector is provided. The area of ​​the reinforcement layer 112 may be larger than the area of ​​the embedded portion 370 projected on the inner surface of the blade, so that the reinforcement layer 112 can completely cover the embedded portion 370 of the corresponding connector.

[0048] Figure 5 The structure of a single connector (first connector 300) is shown. Figure 5As shown, a groove structure is formed on the outer surface of the embedded part 370 to increase the contact area between the first connecting member 300 and the fiberglass reinforced plastic forming the blade structure layer 111 during pouring, thereby enhancing the connectivity between the first connecting member 300 and the fiberglass reinforced plastic of the blade body.

[0049] In addition, if Figure 5 As shown in , the protruding portion 380 may include a connecting plate 381 formed with a connecting hole 320 and reinforcing ribs 382 connected to the embedded portion 370 from both sides of the connecting plate 381, so that each connecting member has a high structural strength. In addition, according to a preferred embodiment of the present invention, two positioning holes 310 and one connecting hole 320 may be formed in each connecting member, but the present invention is not limited thereto, and other numbers of positioning holes and connecting holes may also be provided as required.

[0050] According to an embodiment of the present invention, a gasket 60 and / or a sealing member 10 may be further provided between the end surfaces of the first connector 300 and the second connector 400 that are butted against each other. When the first connector 300 and the second connector 400 are connected to each other through the connection hole 320 of the first connector 300 and the connection hole of the second connector 400 using a fastening member 500 (for example, including a bolt 80 and a nut 70), the gasket 60 may be provided between the first connector 300 and the second connector around the bolt 80, and the sealing member 10 may be provided between the first connector 300 and the second connector around the positioning pin 90.

[0051] However, the present invention is not limited thereto, and the first connecting member 300 and the second connecting member 400 may also directly contact each other without providing the gasket 60 or the seal 10. It should be noted that the above limitation on the length L3 of the positioning pin shaft 90 is set without considering the gasket 60 or the seal 10.

[0052] According to an embodiment of the present invention, at the interface where the first connecting member 300 and the second connecting member 400 are connected to each other, in addition to using the fastening member 500 and the positioning pin 90 for connection, the FRP hand lay-up process or vacuum forming process can also be assisted to increase the FRP reinforcement layer to further enhance the structural strength of the segmented connection.

[0053] In addition, since the first connecting member 300 and the second connecting member 400 are connected by a high-strength bolt pair, in order to ensure the reliability of the connection and to promptly detect loose connections or other problems, a displacement sensor can be added to the fastening component 500 or near the fastening component 500 to monitor the bolt connection status in real time.

[0054] According to another aspect of the present invention, a wind turbine generator set may be provided. The wind turbine generator set may include blades having the above connection structure.

[0055] The following briefly describes a method of manufacturing a segmented blade according to an embodiment of the present invention.

[0056] First, the blade is divided into two sections, namely, a first blade section 100 (e.g., a blade root section) and a second blade section 200 (e.g., a blade tip section), and the production process of each blade body section can remain unchanged. However, at the section, according to the production process of the embedded bolt sleeve, the connectors 300 and 400 are distributed and embedded in the designed positions of the first blade section 100 and the second blade section 200, and the end face steel flange tooling can be used to achieve the precise installation of the first connector 300 and the second connector 400. Thereafter, a glass fiber reinforced plastic reinforcement layer can be added at the installation position of the first connector 300 and the second connector 400 to ensure the structural strength of the blade at the connector.

[0057] The suction surface and pressure surface of the first blade segment 100 and the second blade segment 200 are vacuum infused separately, and the molds are closed after curing to splice them into a whole. After the whole is bonded and cured, the production of the first blade segment 100 and the second blade segment 200 is completed, and then the first blade segment 100 and the second blade segment 200 are post-processed (for example, trimming, grinding, painting, etc.).

[0058] The blade root section and blade tip section blades that have completed all post-processing processes are assembled in the following manner: use a tooling (storage or transportation tooling) to fix the first blade segment 100, then screw the locating pin 90 into the locating hole 310 of the first blade segment 100 and tighten it, and install the seal 10 on the end face of the first blade segment 100; then, lift the second blade segment 200, align the locating holes of the second connecting member 400 on it with the locating pin 90 installed in the first blade segment 100 one by one, push the second blade segment 200, so that the leaking part of the locating pin 90 in the first blade segment 100 is completely inserted into the locating hole of the second connecting member 400, keep the second blade segment 200 stationary, and the staff enters to install the gasket 60, bolts 80 and nuts 70. After the installation is completed, the pre-tightening torque can be applied one by one in the diagonal order according to the pre-tightening force construction requirements to complete the installation work.

[0059] The assembled segmented connection technology of the present invention is an optimization of the existing mechanical connection technology. It is based on the increasingly larger inner cavity space of the blade, which makes it possible to perform short manual operations in the inner cavity of the blade segment. The mechanical connection structure of the present invention does not require pre-embedded screw sleeves and various auxiliary parts, has little impact on the performance of the whole machine, and can make the manufacture of segmented blades and assembly operations at the project site more convenient and reliable, and can be repaired and replaced when quality problems occur.

[0060] According to an embodiment of the present invention, the above-mentioned connection structure can make the manufacture of segmented blades and the assembly operations at the project site more convenient and reliable, and at the same time, no auxiliary docking tooling is required to ensure the correctness of the blade shape after the segmented blades are connected, which ensures product quality while significantly reducing the segmented docking assembly cost.

[0061] In addition, through the assembled segmented connection structure of the present invention, the segmented blades can be repaired and replaced when quality problems occur, thereby reducing quality costs.

[0062] In the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0063] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The features, structures or characteristics described in the present invention may be combined in one or more embodiments in any suitable manner. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring various aspects of the present invention.

Claims

1. A blade, characterized in that: The blade comprises: A first blade segment (100), with a plurality of first connecting members (300) provided on one side; The second blade segment (200) is provided with a plurality of second connecting members (400) on a side opposite to the first blade segment (100). The number and position of the plurality of first connecting members (300) and the plurality of second connecting members (400) correspond to each other, and they can be detachably connected to each other. Each of the plurality of first connecting members (300) and the second connecting member (400) comprises an embedded portion (370) embedded in the blade structure layer (111) of the blade and a protruding portion (380) protruding into the inner cavity of the blade. Wherein, each of the plurality of first connecting members (300) and the plurality of second connecting members (400) further comprises: a positioning hole (310) formed in the embedded portion (370); and a connecting hole (320) formed in the protruding portion (380), The positioning hole (310) and the connecting hole (320) both extend along the length direction of the blade, and the length of a portion of the positioning hole (310) used for installing the positioning pin shaft (90) is greater than the length of the connecting hole (320).

2. The blade according to claim 1, characterized in that A portion of the positioning hole (310) away from a side where the first blade segment (100) and the second blade segment (200) contact each other is provided with an internal thread, and the remaining portion is a flat inner surface.

3. The blade according to claim 2, characterized in that The blade further comprises the positioning pin shaft (90), one end of the positioning pin shaft (90) being formed with an external thread that matches the internal thread of the positioning hole (310). Among them, L1+L2<L3≤L1+2L2, wherein L1 is the length of the positioning hole (310) provided with an internal thread, L2 is the length of the portion of the positioning hole (310) having a flat inner surface, L3 is the length of the positioning pin shaft (90), and the length of the portion of the positioning pin shaft (90) formed with an external thread is L1.

4. The blade according to claim 1, characterized in that The blade further comprises a reinforcement layer (112), wherein the reinforcement layer (112) is laid on the inner surface of a region of the blade where the embedded portion (370) is provided. Wherein, the area of ​​the reinforcement layer (112) is larger than the area of ​​the embedded portion (370) projected onto the inner surface of the blade.

5. The blade according to claim 4, characterized in that The reinforcement layer (112) is a glass fiber reinforced plastic reinforcement layer.

6. The blade according to claim 1, characterized in that A groove structure is formed on the outer surface of the embedded part (370).

7. The blade according to claim 1, characterized in that A gasket (60) and / or a sealing member (10) is provided between the butted end surfaces of the first connecting member (300) and the second connecting member (400).

8. The blade according to any one of claims 1 to 7, characterized in that The plurality of first connecting members (300) and the plurality of second connecting members (400) are arranged on the main beam region and the trailing edge beam region of the pressure surface (110) and the suction surface (120) of the blade, Wherein, the first connecting member (300) and the second connecting member (400) located in the main beam region are respectively arranged on both sides of the web (130) of the blade.

9. The blade according to claim 1, characterized in that The fastening member (500) passes through the first connecting piece (300) and the second connecting piece (400) corresponding to each other to connect the first blade segment (100) and the second blade segment (200) to each other. Wherein, a displacement sensor is provided on the fastening member (500) or near the fastening member (500).

10. A wind turbine generator set, characterized in that: The wind turbine generator set comprises the blade according to any one of claims 1 to 9.

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