A wind turbine and a nacelle thereof

Abstract

The application discloses a wind turbine and a nacelle thereof, comprising at least two cover shells connected in a head-to-tail splicing mode; the end of one of any two adjacent cover shells is provided with a first raised edge, the end of the other cover shell is provided with a second raised edge, the first raised edge is overlapped with the second raised edge, a plurality of groups of connecting components for detachably connecting the two cover shells are arranged between the first raised edge and the second raised edge, and a water baffle cap for covering all the connecting components is integrally arranged on the side of the first raised edge away from the second raised edge. The connecting mode between the cover shells of the nacelle is optimized, the first raised edge and the second raised edge are overlapped to prevent rainwater from penetrating from the splicing gap, and the water baffle cap is additionally arranged to prevent rainwater from penetrating from the bolt connection, so that the sealing property of the nacelle is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a wind turbine generator set and its nacelle cover. Background Technology

[0002] The nacelle is the outermost protective device for a wind turbine generator set. The core components of the wind turbine generator set, such as the generator, gearbox, and converter, are basically installed inside the nacelle. The nacelle has excellent weather resistance, corrosion resistance, aging resistance, and fatigue resistance, protecting the core components from external environmental factors such as wind, snow, rain, and salt spray, and ensuring that the wind turbine generator set can operate reliably in harsh weather conditions.

[0003] The naval canopy is quite large, and to facilitate processing and transportation, it is assembled from multiple shell panels. During assembly, adjacent shell panels are first fastened together with bolts, and then the seams are sealed with sealant. However, the existing connection method for naval canopies still has several shortcomings. First, gaps exist between the threaded holes formed after the adjacent shell panels are joined and the bolts, making the bolt joints susceptible to water ingress. Second, the sealant at the seams is often inadequate due to the lack of experience of the personnel applying the sealant; furthermore, the sealant may fail to seal properly due to aging or deformation caused by thermal expansion and contraction, allowing water to easily seep into the gaps.

[0004] Therefore, the joints of the existing cabin cover are prone to water ingress and have relatively poor sealing performance. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a wind turbine generator set and its nacelle cover, wherein the overlapping first and second raised edges can prevent rainwater from seeping in from the splice gaps, and the water-blocking cap provided on the first raised edge can prevent rainwater from seeping in from the bolt connection, thereby solving the problem of easy water seepage at the splice of the existing nacelle cover.

[0006] The nacelle cover of the wind turbine generator provided by the present invention includes at least two cover pieces spliced ​​together end to end;

[0007] One end of any two adjacent covers is provided with a first protruding edge, and the other end is provided with a second protruding edge. The first protruding edge overlaps with the second protruding edge. Several sets of connecting components for detachably connecting the two are provided between the first protruding edge and the second protruding edge. A water-proof cap for covering all connecting components is integrally fixed on the side of the first protruding edge away from the second protruding edge.

[0008] Preferably, any set of connecting components includes a connecting bolt with a stop block at the head and a connecting nut installed at the tail of the connecting bolt; the first protruding edge is provided with a plurality of first mounting holes, and the second protruding edge is provided with a plurality of second mounting grooves. When the first protruding edge overlaps with the second protruding edge, the corresponding first mounting holes and second mounting grooves pass through to form a connecting slide; the two ends of the connecting slide are respectively provided with a clearance part and a connecting part.

[0009] When the stop block passes through the clearance part, the connecting bolt enters the connecting slide from the clearance part;

[0010] When the connecting bolt slides from the clearance part to the connecting part, the stop block and the connecting nut abut against the two sides of the connecting part respectively, and the first protruding edge and the second protruding edge are fixedly connected by the connecting nut.

[0011] Preferably, both the first mounting hole and the second mounting groove are U-shaped structures. When the first protrusion overlaps the second protrusion, the connecting slide is a U-shaped groove.

[0012] Preferably, any set of connecting components further includes a stop washer fitted onto the connecting bolt. When the connecting bolt slides from the clearance part to the connecting part, the stop block and the stop washer abut against the two sides of the connecting part, respectively.

[0013] Preferably, any set of connecting components further includes an anti-loosening retaining ring sleeved on the connecting bolt and abutting against the connecting nut.

[0014] Preferably, the water-retaining cap and the first protrusion edge form a receiving cavity, and the cavity also includes a sealing element installed inside the receiving cavity.

[0015] Preferably, the cross-section of the receiving cavity is a right-angled trapezoid.

[0016] Preferably, when the first protruding edge overlaps the second protruding edge, the free end of the first protruding edge and the second protruding edge are sealed with a sealing adhesive.

[0017] Preferably, the width of the first protrusion edge is greater than the width of the second protrusion edge.

[0018] The wind turbine generator set provided by the present invention includes the nacelle cover described in any of the above claims.

[0019] Compared to the prior art, the nacelle cover of the wind turbine generator provided by the present invention includes at least two cover pieces, all of which are spliced ​​together end to end. One end of any two adjacent cover pieces is provided with a first protruding edge, and the other end is provided with a second protruding edge. The first protruding edge overlaps with the second protruding edge. Both the first and second protruding edges are raised upward relative to the main body of the cover piece. The vertical surfaces of the first and second protruding edges can prevent rainwater from flowing into the nacelle cover from the splicing seam. Furthermore, the overlapping portion of the first and second protruding edges also has a certain height, which is higher than the main body of the two adjacent cover pieces, and can also effectively prevent rainwater from flowing into the nacelle cover from the splicing seam.

[0020] Furthermore, a number of connecting components are provided between the first protruding edge and the second protruding edge for detachable connection of the two after the first protruding edge and the second protruding edge overlap.

[0021] A water-retaining cap is integrally fixed on the side of the first protrusion away from the second protrusion to cover all connecting components and prevent rainwater from flowing into the cabin cover from the bolted connection.

[0022] In summary, this invention significantly improves the sealing performance of the cabin cover by optimizing the connection method between the various shells, using the overlapping first and second protruding edges to prevent rainwater from seeping in through the splicing gaps, and using the added water-blocking caps to prevent rainwater from seeping in through the bolt connections.

[0023] The wind turbine generator set provided by the present invention includes the above-mentioned nacelle cover and has the same beneficial effects. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a front structural view of the adjacent shells of the nacelle of a wind turbine generator set after splicing together, according to a specific embodiment of the present invention.

[0026] Figure 2 for Figure 1 Reverse structural diagram;

[0027] Figure 3 for Figure 1 Front structural diagram of the first casing;

[0028] Figure 4 for Figure 1 A structural diagram of the rear of the first casing;

[0029] Figure 5 for Figure 1 Front view of the second outer shell;

[0030] Figure 6 for Figure 1 A schematic diagram of the cross-section at the joint between the first and second covers;

[0031] Figure 7 for Figure 1 A cross-sectional view of the joint between the first and second covers;

[0032] Figure 8 for Figure 1 Structural diagram of the connecting bolt;

[0033] Figure 9 for Figure 1 A diagram showing the state when two adjacent shells are about to overlap.

[0034] Figure 10 for Figure 1 A diagram showing the state of two adjacent shells after they have overlapped.

[0035] Figure 11 for Figure 1 Diagram showing the state of the connecting bolts installed at the overlap of two adjacent covers;

[0036] Figure 12 for Figure 1 A diagram showing the state of the connection component fastening the overlap between two adjacent housings.

[0037] The attached figures are labeled as follows:

[0038] First housing 1, second housing 2, connecting assembly 3, sealing element 4, and sealing adhesive 5;

[0039] First protruding edge 11, water-retaining cap 12

[0040] First mounting hole 13 and receiving cavity 14;

[0041] Second protrusion 21 and second mounting groove 22;

[0042] Connecting bolt 31, connecting nut 32, stop washer 33, and anti-loosening retaining ring 34;

[0043] Stop block 311. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Please refer to Figures 1 to 12 , Figure 1 This is a front structural view of the adjacent shells of the nacelle of a wind turbine generator set after splicing together, according to a specific embodiment of the present invention. Figure 2 for Figure 1 Reverse structural diagram; Figure 3 for Figure 1 Front structural diagram of the first casing; Figure 4 for Figure 1 A structural diagram of the rear of the first casing; Figure 5 for Figure 1 Front view of the second outer shell; Figure 6 for Figure 1 A schematic diagram of the cross-section at the joint between the first and second covers; Figure 7 for Figure 1 A cross-sectional view of the joint between the first and second covers; Figure 8 for Figure 1 Structural diagram of the connecting bolt; Figure 9 for Figure 1 A diagram showing the state when two adjacent shells are about to overlap. Figure 10 for Figure 1 A diagram showing the state of two adjacent shells after they have overlapped. Figure 11 for Figure 1 Diagram showing the state of the connecting bolts installed at the overlap of two adjacent covers; Figure 12 for Figure 1 A diagram showing the state of the connection component fastening the overlap between two adjacent housings.

[0047] First, it should be noted that directional terms such as up, down, left, and right in the text are all appended. Figure 1 The view at that time shall prevail.

[0048] This invention discloses a nacelle cover for a wind turbine generator set, comprising at least two shells joined end to end. One end of any two adjacent shells is provided with a first protruding edge 11, and the other end is provided with a second protruding edge 21. Both the first protruding edge 11 and the second protruding edge 21 are bent upward relative to the main body of the shell.

[0049] In this specific embodiment, such as Figure 1 As shown, the cabin cover includes a first cover 1 and a second cover 2. The first protrusion 11 is an L-shaped structure integrally provided at the right end of the first cover 1. The first protrusion 11 includes a first vertical water-blocking part extending vertically upward from the right end of the first cover 1 and a first horizontal overlapping part extending horizontally to the right from the top of the first vertical water-blocking part. The first vertical water-blocking part and the first horizontal overlapping part are vertically connected and smoothly joined.

[0050] Similarly, the second protrusion 21 is an L-shaped structure integrally formed on the left end of the second cover 2. The first protrusion 11 includes a second vertical water-blocking portion extending vertically upward from the left end of the second cover 2 and a second horizontal overlapping portion extending horizontally to the left from the top of the second vertical water-blocking portion. The second vertical water-blocking portion and the second horizontal overlapping portion are vertically connected and smoothly joined. In this specific embodiment, the structures of the first cover 1 and the second cover 2 are identical.

[0051] When the first horizontal overlap is parallel to the second horizontal overlap, the first vertical water-blocking part and the second vertical water-blocking part are parallel in the vertical direction. In this way, the vertical surfaces of the first protruding edge 11 and the second protruding edge 21 can jointly prevent rainwater from flowing into the cabin cover from the splicing seam. The overlapping part of the first protruding edge 11 and the second protruding edge 21 also has a certain height, which is higher than the main body of the two adjacent covers, and can also effectively prevent rainwater from flowing into the cabin cover from the splicing seam.

[0052] Several sets of connecting components 3 are provided between the first protruding edge 11 and the second protruding edge 21 for detachable connection after the first protruding edge 11 and the second protruding edge 21 overlap. All connecting components 3 are evenly distributed along the width direction of the cover to ensure reliable connection between adjacent covers.

[0053] A water-blocking cap 12 is integrally fixed on the side of the first protrusion 11 away from the second protrusion 21, used to cover all connecting components 3 and prevent rainwater from flowing into the nacelle from the bolt connection. In this specific embodiment, the water-blocking cap 12 includes a vertical water-blocking part, a horizontal water-blocking part, and an inclined water-blocking part connected in sequence. The vertical water-blocking part extends vertically upward from the top of the first vertical water-blocking part. The horizontal water-blocking part connects the vertical water-blocking part and the inclined water-blocking part, and the horizontal water-blocking part and the vertical water-blocking part are vertically connected and smoothly joined. The two ends of the inclined water-blocking part are respectively connected to the horizontal water-blocking part and the first horizontal overlapping part, and are angularly distributed with the two connected parts. The angle of inclination between the inclined water-blocking part and the horizontal water-blocking part and the angle of inclination between the inclined water-blocking part and the first horizontal overlapping part are both obtuse angles.

[0054] In summary, the present invention significantly improves the sealing performance of the cabin cover by optimizing the connection method between the various shells of the cabin cover, using the overlapping first protrusion 11 and second protrusion 21 to prevent rainwater from seeping in from the splicing gaps, and using the added water-blocking cap 12 to prevent rainwater from seeping in from the bolt connection.

[0055] Any set of connecting components 3 includes a connecting bolt 31 and a connecting nut 32. The head of the connecting bolt 31 is provided with a stop block 311. The stop block 311 is preferably a square block, but it can also be a round block, a regular hexagonal block, or other similar structures, which are not specifically limited here. The connecting nut 32 is installed at the tail of the connecting bolt 31 and is used to cooperate with the connecting bolt 31 to fasten the overlapping first protrusion 11 and second protrusion 21.

[0056] The first protrusion 11 is provided with a plurality of first mounting holes 13, all of which are evenly distributed linearly on the first horizontal overlap, and each first mounting hole 13 penetrates along the thickness direction of the first horizontal overlap.

[0057] The second protrusion 21 is provided with a plurality of second mounting grooves 22, all of which are linearly and evenly distributed on the second horizontal overlap. All the first mounting holes 13 correspond to and penetrate all the second mounting grooves 22. Each second mounting groove 22 penetrates along the thickness direction of the second horizontal overlap, but the side of each second mounting groove 22 near the side edge of the second horizontal overlap is open to compensate for the processing errors of the first mounting holes 13 and the second mounting grooves 22, which helps to reduce the difficulty of disassembling and assembling the connecting component 3.

[0058] When the first protruding edge 11 overlaps the second protruding edge 21, all the first mounting holes 13 and all the second mounting grooves 22 are connected one-to-one, forming a connecting slide. The connecting bolt 31 can slide along the connecting slide. Both ends of the connecting slide are provided with a clearance portion and a connecting portion. The width of the clearance portion is greater than the width of the stop block 311 of the connecting bolt 31, used to allow the stop block 311 of the connecting bolt 31 to pass through, facilitating the installation of the connecting bolt 31 between the first protruding edge 11 and the second protruding edge 21. The width of the connecting portion is equal to the outer diameter of the connecting bolt 31, allowing only the connecting bolt 31 to pass through, but the stop block 311 cannot pass through the connecting portion. The stop block 311 and the connecting nut 32 are located on opposite sides of the connecting portion, enabling the connecting bolt 31 to be fixedly connected to the first protruding edge 11 and the second protruding edge 21.

[0059] During assembly, first insert the connecting bolt 31 into the connecting slide from the clearance part. When the stop block 311 passes through the clearance part, the connecting bolt 31 enters the connecting slide from the clearance part. Next, move the connecting bolt 31. When the connecting bolt 31 slides from the clearance part to the connecting part, install the connecting nut 32. The stop block 311 and the connecting nut 32 are located on both sides of the connecting part. Tighten the connecting nut 32. The stop block 311 and the connecting nut 32 abut against both sides of the connecting part. The first protruding edge 11 and the second protruding edge 21 are fixedly connected by the connecting nut 32. The special structure of the first mounting hole 13 and the second mounting groove 22 not only facilitates the connection of the connecting component 3 to the first protruding edge 11 and the second protruding edge 21, but also allows the connecting component 3 to be installed inside the water-blocking cap 12, solving the problem that the connecting component 3 cannot be installed due to the setting of the water-blocking cap 12.

[0060] In this specific embodiment, both the first mounting hole 13 and the second mounting groove 22 are U-shaped structures. When the first protruding edge 11 overlaps with the second protruding edge 21, the connecting slide is a U-shaped groove. It should be noted that both the first mounting hole 13 and the second mounting groove 22 are composed of a combination of square holes and oblong holes. However, the length of both the square hole and the oblong hole of the second mounting groove 22 is greater than that of the first mounting hole 13. This allows for adjustment of the second protruding edge 21 within a certain range, enabling the second mounting groove 22 to align with the first mounting hole 13. This still compensates for the installation error between the first mounting hole 13 and the second mounting groove 22, reducing assembly difficulty and defect rate.

[0061] Of course, the first mounting hole 13 and the second mounting hole can also be teardrop-shaped or other similar structures, as long as one end is larger than the size of the stop block 311 and the other end is smaller than the size of the stop block 311. No specific limitation is made here.

[0062] Any set of connecting components 3 also includes a stop washer 33 fitted onto the connecting bolt 31. When the connecting bolt 31 slides from the clearance part to the connecting part, the stop washer 33 replaces the connecting nut 32 and abuts against the connecting part of the connecting slide, so that the stop block 311 and the stop washer 33 abut against the two sides of the connecting part respectively.

[0063] This not only prevents the surface of the second protrusion 21 from being scratched by the connecting nut 32, but also avoids distributing the load of the connecting nut 32 on the second protrusion 21, and increases the contact area with the connecting part to prevent the connecting nut 32 from getting stuck in the connecting slide.

[0064] Any set of connecting components 3 also includes an anti-loosening retaining ring 34 sleeved on the connecting bolt 31. The anti-loosening retaining ring 34 is located at the tail of the connecting nut 32 and abuts against the connecting nut 32 to prevent the connecting nut 32 from loosening and to ensure that the connecting components 3 are reliably connected.

[0065] The water-retaining cap 12 and the first protrusion 11 form a receiving cavity 14. The aforementioned nacelle cover also includes a sealing element 4 installed in the receiving cavity 14. The sealing element 4 can be made of PVC material to further improve the sealing performance of the water-retaining cap 12, thereby improving the sealing performance of the nacelle cover.

[0066] The cross-section of the receiving cavity 14 is a right-angled trapezoid, which facilitates the processing of the water-retaining cap 12 and improves its waterproof performance, reducing the risk of rainwater entering the splicing gap. It should be noted that the width of the water-retaining cap 12 is smaller than the width of the first horizontal overlap.

[0067] When the first protruding edge 11 overlaps with the second protruding edge 21, the free end of the first protruding edge 11 and the second protruding edge 21 are sealed by the sealing adhesive 5. Specifically, the gap between the first horizontal overlap and the second horizontal overlap is sealed with adhesive to further prevent rainwater from flowing into the joint gap and further improve the airtightness of the cabin cover.

[0068] The width of the first protrusion 11 is greater than the width of the second protrusion 21, that is, the width of the first horizontal overlap is greater than the width of the second horizontal overlap. When the first protrusion 11 overlaps with the second protrusion 21, a U-shaped groove is formed between the first horizontal overlap and the second horizontal overlap, which facilitates the containment of a certain volume of sealing colloid 5, making the colloid sealant more effective.

[0069] The wind turbine generator set provided by the present invention includes the above-mentioned nacelle cover and has the same beneficial effects.

[0070] The wind turbine generator set and its nacelle cover provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A nacelle cover for a wind turbine generator system, characterized in that, It includes at least two shells that are spliced ​​together end to end; one end of any two adjacent shells is provided with a first protruding edge (11), and the other end is provided with a second protruding edge (21). The first protruding edge (11) overlaps with the second protruding edge (21). Several sets of connecting components (3) for detachably connecting the two are provided between the first protruding edge (11) and the second protruding edge (21). A water-proof cap (12) for covering all the connecting components (3) is integrally fixed on the side of the first protruding edge (11) away from the second protruding edge (21). The water-blocking cap (12) includes a vertical water-blocking part, a horizontal water-blocking part and an inclined water-blocking part connected in sequence. The vertical water-blocking part extends vertically upward from the top of the first vertical water-blocking part along the first protrusion (11). The horizontal water-blocking part is connected between the vertical water-blocking part and the inclined water-blocking part. The horizontal water-blocking part and the vertical water-blocking part are vertically connected and smoothly joined. The two ends of the inclined water-blocking part are respectively connected to the horizontal water-blocking part and the first horizontal overlapping part along the first protrusion (11), and are angularly distributed with the two connected parts. The first protruding edge (11) is provided with a plurality of first mounting holes (13), and the second protruding edge (21) is provided with a plurality of second mounting grooves (22). When the first protruding edge (11) overlaps with the second protruding edge (21), the corresponding first mounting holes (13) and second mounting grooves (22) pass through to form a connecting slide. Both the first mounting holes (13) and the second mounting grooves (22) are convex-shaped structures. When the first protruding edge (11) overlaps with the second protruding edge (21), the connecting slide is a convex-shaped groove. When the first horizontal overlap of the first protruding edge (11) overlaps parallel to the second horizontal overlap of the second protruding edge (21), the first vertical water-blocking part and the second vertical water-blocking part of the second protruding edge (21) are parallel in the vertical direction. The vertical surfaces of the first protruding edge (11) and the second protruding edge (21) together prevent rainwater from flowing into the cabin cover from the splicing gap. The overlap of the first protruding edge (11) and the second protruding edge (21) has a certain height, which is higher than the main body of the two adjacent covers. Any set of the connecting components (3) includes a connecting bolt (31) with a stop block (311) at the head and a connecting nut (32) installed at the tail of the connecting bolt (31); the two ends of the connecting slide are respectively provided with a clearance part and a connecting part; When the stop block (311) passes through the clearance portion, the connecting bolt (31) enters the connecting slide from the clearance portion; When the connecting bolt (31) slides from the clearance part to the connecting part, the stop block (311) and the connecting nut (32) abut against the two sides of the connecting part respectively, and the first protruding edge (11) and the second protruding edge (21) are fixedly connected by the connecting nut (32); The water-retaining cap (12) and the first protrusion (11) form a receiving cavity (14), and the nacelle cover also includes a sealing element (4) installed in the receiving cavity (14); the cross-section of the receiving cavity (14) is a right trapezoid. When the first protruding edge (11) overlaps the second protruding edge (21), the free end of the first protruding edge (11) and the second protruding edge (21) are sealed by a sealing adhesive (5); The width of the first protruding edge (11) is greater than the width of the second protruding edge (21); when the first protruding edge (11) overlaps with the second protruding edge (21), a U-shaped groove is formed between the first horizontal overlap and the second horizontal overlap to accommodate the sealing colloid (5).

2. The nacelle cover of the wind turbine generator set according to claim 1, characterized in that, Any set of the connecting components (3) further includes a stop washer (33) sleeved on the connecting bolt (31). When the connecting bolt (31) slides from the relief part to the connecting part, the stop block (311) and the stop washer (33) abut against the two sides of the connecting part respectively.

3. The nacelle cover of the wind turbine generator set according to claim 1, characterized in that, Any set of the connecting components (3) further includes an anti-loosening retaining ring (34) sleeved on the connecting bolt (31) and abutting against the connecting nut (32).

4. A wind turbine generator set, characterized in that, Includes the cabin cover as described in any one of claims 1 to 3.

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