A pre-fabricated reinforced sub-shroud for a wind turbine nacelle

Abstract

The utility model relates to the technical field of wind power cabin cover, specifically relates to a kind of prefabricated reinforcing sub-shield for wind power cabin cover, including wind power cabin cover ontology, the wind power cabin cover ontology inside assembly has flow guide mechanism, the flow guide mechanism includes reinforcing sub-shield, flow guide bevel, horizontal plane, flow guide groove, round angle, the reinforcing sub-shield lower surface is fixedly connected on the wind power cabin cover ontology upper surface, the flow guide bevel is set up in the reinforcing sub-shield upper surface.The wind of the utility model first impact on the 13 ° flow guide bevel of reinforcing sub-shield upper surface, this angle is very gentle, can smoothly guide wind, make it flow along bevel upwards and rear, avoid the severe separation and turbulence of airflow in starting point, to solve the airflow flowing through the non-streamlined cabin, will produce periodic vortex shedding, cause cabin and tower drum harmful vibration, long-term, it can lead to structural fatigue damage, flow cover can stabilize airflow, suppress this vibration problem.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine nacelle covers, specifically a prefabricated reinforced sub-cover for wind turbine nacelles. Background Technology

[0002] Wind power, as a clean energy source, has been increasingly widely used. Wind turbine equipment includes components such as towers, nacelles, generator sets, and blades. The nacelle is installed on top of the tower, the generator set is installed inside the nacelle, and the blades are installed outside the nacelle. The blades are connected to the generator set inside the nacelle to drive the generator set. Here, the nacelle and generator set components are collectively referred to as the wind turbine nacelle. The wind turbine nacelle is a key protective shell for the wind turbine generator set. It is made of composite materials such as fiberglass reinforced plastic and is mainly used in the protection of megawatt-level wind turbine generator sets. This component consists of components such as a bottom cover, top cover, ventilation openings, and support plates. It is installed on the main frame and the top of the tower and can resist environmental corrosion such as wind, rain, snow, salt spray, and ultraviolet radiation, ensuring the stable operation of the internal equipment of the unit for more than 20 years.

[0003] In existing technologies, if airflow passes through a non-streamlined nacelle, it will generate periodic vortex shedding, causing harmful vibrations in the nacelle and tower. Over time, this will lead to structural fatigue damage. The fairing can stabilize the airflow and suppress this vibration.

[0004] Therefore, a prefabricated reinforced sub-cover for wind turbine nacelles is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a prefabricated reinforced sub-cover for wind turbine nacelles, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: including a wind turbine nacelle cover body, wherein a flow guiding mechanism is assembled inside the wind turbine nacelle cover body; The flow guiding mechanism includes a reinforcing sub-cover, a flow guiding slope, a horizontal plane, a flow guiding groove, and rounded corners. The lower surface of the reinforcing sub-cover is fixedly connected to the upper surface of the wind turbine nacelle cover body. The flow guiding slope is formed on the upper surface of the reinforcing sub-cover. The horizontal plane is formed on the side of the flow guiding slope. The flow guiding groove is formed on the upper surface of the flow guiding slope and the upper surface of the horizontal plane.

[0007] Preferably, the rounded corners are formed on the inner and outer walls of the guide grooves, and there are seven guide grooves in total, which are parallel to each other.

[0008] Preferably, the angle between the reinforcing sub-cover and the wind turbine nacelle cover body is 13°, and the horizontal plane is perpendicular to the upper surface of the wind turbine nacelle cover body.

[0009] Preferably, the wind turbine nacelle cover body is equipped with a cleaning mechanism inside.

[0010] Preferably, the cleaning mechanism includes a heat dissipation vent, an inclined plate, a first fixed plate, a lead screw, a second fixed plate, a first telescopic cover, a second telescopic cover, a motor housing, a motor, a magnetic conductor, a permanent magnet, a sleeve, a connecting rod, a spring, a first conical block, and a second conical block. The heat dissipation vent is opened on the upper surface of the wind turbine nacelle cover body. The inclined plate is fixedly connected to the inner wall side of the reinforcing sub-cover. Two sets of first fixed plates are fixedly connected to the lower surface of the inclined plate. The lead screw is rotatably connected to the side of the first fixed plate through a bearing. The upper surface of the second fixed plate is fixedly connected to the lower surface of the inclined plate. The first telescopic cover is movably sleeved on the outer wall of the lead screw, and the second telescopic cover is movably sleeved on the outer wall of the lead screw.

[0011] Preferably, the motor housing is fixedly connected to the side of the first fixing plate, the motor is fixedly connected to the side of the motor housing, the magnetic conductor is fixedly connected to the upper surface of the second fixing plate, the permanent magnet is slidably connected to the upper surface of the inclined plate, and the sleeve is fixedly connected to the side of the permanent magnet.

[0012] Preferably, the connecting rod is slidably connected inside the sleeve, the spring is fixedly connected to the back of the inner wall of the sleeve, the first conical block is fixedly connected to the side of the connecting rod, and the second conical block is fixedly connected to the bottom of the inner wall of the inclined plate.

[0013] Preferably, the magnetic conductor is magnetically connected to the permanent magnet, the lead screw movably passes through the first fixed plate, the extension end of the lead screw extends to the left side of the first fixed plate, the extension end of the lead screw is fixedly connected to the output end of the motor, the end of the spring away from the inner wall of the sleeve is fixedly connected to the front of the connecting rod, the two ends of the first telescopic cover are respectively fixedly connected to the sides of the first fixed plate and the second fixed plate, the two ends of the second telescopic cover are respectively fixedly connected to the sides of the second fixed plate and the first fixed plate, two limiting rods are fixedly connected between the two sets of first fixed plates, and the second fixed plate is slidably connected to the outer wall of the two limiting rods.

[0014] Compared with the prior art, the present invention provides a prefabricated reinforced sub-cover for wind turbine nacelles, which has the following advantages: First, the wind impacts the 13° guide slope on the upper surface of the reinforced sub-fair. This angle is very gentle, which can smoothly guide the wind to flow upward and backward along the slope, avoiding severe separation and turbulence of the airflow at the starting point. This solves the problem that the airflow passing through the non-streamlined nacelle will generate periodic vortex shedding, causing harmful vibrations in the nacelle and tower. Over the long term, this will lead to structural fatigue damage. The fairing can stabilize the airflow and suppress this vibration problem.

[0015] 2. After passing through the wind guide during rain, the wind will enter the wind turbine nacelle, potentially bringing in debris such as leaves and bird droppings. To remove this debris, the motor needs to be started. The motor drives the lead screw to rotate, which in turn moves the second fixed plate to the right. During this movement, the second fixed plate slides downwards via a limit rod, causing components such as the magnetic conductor, permanent magnet, sleeve, and connecting rod to move to the right. This, in turn, causes the connecting rod to clean the debris from the surface of the inclined plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a front view of part of the structure of this utility model; Figure 4 This is a bottom view of part of the structure of this utility model; Figure 5 This is a top sectional view of part of the structure of this utility model; Figure 6 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0017] In the diagram: 1. Wind turbine nacelle body; 2. Flow guiding mechanism; 21. Reinforcing sub-cover; 22. Flow guiding slope; 23. Horizontal plane; 24. Flow guiding groove; 25. Rounded corner; 3. Cleaning mechanism; 31. Heat dissipation vent; 32. Inclined plate; 33. First fixing plate; 34. Lead screw; 35. Second fixing plate; 36. First telescopic cover; 37. Second telescopic cover; 38. Motor housing; 39. Motor; 310. Magnetic conductor; 311. Permanent magnet; 312. Sleeve; 313. Connecting rod; 314. Spring; 315. First conical block; 316. Second conical block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0019] See Figures 1-3 This embodiment provides a prefabricated reinforced sub-cover for wind turbine nacelle, including a wind turbine nacelle body 1, and a flow guiding mechanism 2 is assembled inside the wind turbine nacelle body 1; The flow guiding mechanism 2 includes a reinforcing sub-cover 21, a flow guiding slope 22, a horizontal surface 23, a flow guiding groove 24, and a rounded corner 25. The lower surface of the reinforcing sub-cover 21 is fixedly connected to the upper surface of the wind turbine nacelle cover body 1. The flow guiding slope 22 is formed on the upper surface of the reinforcing sub-cover 21, the horizontal surface 23 is formed on the side of the flow guiding slope 22, and the flow guiding groove 24 is formed on the upper surface of the flow guiding slope 22 and the upper surface of the horizontal surface 23.

[0020] Rounded corners 25 are formed on the inner and outer walls of the guide grooves 24. There are seven guide grooves 24 in total, and the guide grooves 24 are parallel to each other.

[0021] The angle between the reinforcing sub-cover 21 and the wind turbine nacelle cover body 1 is 13°, and the horizontal plane 23 is perpendicular to the upper surface of the wind turbine nacelle cover body 1.

[0022] In practical use, the wind first impacts the 13° guide slope 22 on the upper surface of the reinforcing sub-cover 21. This angle is very gentle, and the wind is smoothly guided by this guide slope 22, flowing upwards and backwards along the slope. This avoids severe separation and turbulence at the starting point, laying the foundation for smooth flow afterwards. The seven parallel guide channels 24 on the guide slope 22 actively intervene in the boundary layer of the flow. When the wind flows through these channels, it generates small, controllable vortices, carrying the energy of the high-speed airflow above into the low-speed boundary layer below, filling it with energy. The turbulent boundary layer allows the wind to flow smoothly across the junction of the guide slope 22 and the horizontal plane 23 without separation. At the same time, when encountering rain or snow, the guide grooves 24 on the horizontal plane 23 and the guide slope 22 together form an efficient drainage system, which collects water and quickly guides it to the rear of the wind turbine nacelle cover body 1 to prevent water accumulation and icing. The rounded corners 25 inside and outside the guide grooves 24 eliminate sharp concave corners, evenly distribute stress, and effectively prevent cracks from being generated from these stress concentration points. The reinforcing sub-cover 21 is integrally molded and is installed on the upper surface of the wind turbine nacelle cover body 1 by bolts. Example 2

[0023] See Figures 3-6 Based on Embodiment 1, a cleaning mechanism 3 is installed inside the wind turbine nacelle cover body 1.

[0024] The cleaning mechanism 3 includes a heat dissipation vent 31, an inclined plate 32, a first fixed plate 33, a lead screw 34, a second fixed plate 35, a first telescopic cover 36, a second telescopic cover 37, a motor housing 38, a motor 39, a magnetic conductor 310, a permanent magnet 311, a sleeve 312, a connecting rod 313, a spring 314, a first conical block 315, and a second conical block 316. The heat dissipation vent 31 is opened on the upper surface of the wind turbine nacelle cover body 1. The inclined plate 32 is fixedly connected to the inner wall side of the reinforcing sub-cover 21. Two sets of first fixed plates 33 are fixedly connected to the lower surface of the inclined plate 32. The lead screw 34 is rotatably connected to the side of the first fixed plate 33 through a bearing. The upper surface of the second fixed plate 35 is fixedly connected to the lower surface of the inclined plate 32. The first telescopic cover 36 is movably sleeved on the outer wall of the lead screw 34, and the second telescopic cover 37 is movably sleeved on the outer wall of the lead screw 34.

[0025] The motor housing 38 is fixedly connected to the side of the first fixed plate 33, the motor 39 is fixedly connected to the side of the motor housing 38, the magnetic conductor 310 is fixedly connected to the upper surface of the second fixed plate 35, the permanent magnet 311 is slidably connected to the upper surface of the inclined plate 32, and the sleeve 312 is fixedly connected to the side of the permanent magnet 311.

[0026] The connecting rod 313 is slidably connected inside the sleeve 312, the spring 314 is fixedly connected to the back of the inner wall of the sleeve 312, the first conical block 315 is fixedly connected to the side of the connecting rod 313, and the second conical block 316 is fixedly connected to the bottom of the inner wall of the inclined plate 32.

[0027] The magnetic conductor 310 is magnetically connected to the permanent magnet 311. The lead screw 34 moves through the first fixed plate 33. The extension end of the lead screw 34 extends to the left side of the first fixed plate 33. The extension end of the lead screw 34 is fixedly connected to the output end of the motor 39. The end of the spring 314 away from the inner wall of the sleeve 312 is fixedly connected to the front of the connecting rod 313. The two ends of the first telescopic cover 36 are fixedly connected to the sides of the first fixed plate 33 and the second fixed plate 35, respectively. The two ends of the second telescopic cover 37 are fixedly connected to the sides of the second fixed plate 35 and the first fixed plate 33, respectively. Two limiting rods are fixedly connected between the two sets of first fixed plates 33. The second fixed plate 35 is slidably connected to the outer wall of the two limiting rods.

[0028] In practical use, when the above-mentioned equipment passes through the wind guide during rainy weather, the wind will enter the interior of the wind turbine nacelle body 1 and fall onto the inner wall of the inclined plate 32, where some leaves or bird droppings may accumulate. The motor 39 needs to be started. The motor 39 drives the lead screw 34 to rotate, which in turn moves the second fixed plate 35 to the right. During this movement, the second fixed plate 35 slides downwards under the limit of the limiting rod. The second fixed plate 35 then moves the magnetic conductor 310 to the right, which in turn moves the permanent magnet 311 to the right. The permanent magnet 311 then moves the sleeve 312 to the right, which in turn moves the connecting rod. When the connecting rod 313 moves, it causes the first conical block 315 to slide to the right. When the first conical block 315 contacts the second conical block 316, the first conical block 315 is squeezed by the second conical block 316, and the first conical block 315 moves to the back. The first conical block 315 causes the connecting rod 313 to move to the back, and the connecting rod 313 squeezes the spring 314. When the first conical block 315 slides between the two second conical blocks 316, the spring 314 causes the connecting rod 313 to move to the front, so that the connecting rod 313 can also move left and right during the movement, which improves the cleaning efficiency of the inclined plate 32.

[0029] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prefabricated reinforcing sub-cover for a wind turbine nacelle, characterized in that: Includes a wind turbine nacelle cover body (1), and a flow guiding mechanism (2) is installed inside the wind turbine nacelle cover body (1); The flow guiding mechanism (2) includes a reinforcing sub-cover (21), a flow guiding slope (22), a horizontal surface (23), a flow guiding groove (24), and a rounded corner (25). The lower surface of the reinforcing sub-cover (21) is fixedly connected to the upper surface of the wind turbine nacelle cover body (1). The flow guiding slope (22) is opened on the upper surface of the reinforcing sub-cover (21). The horizontal surface (23) is opened on the side of the flow guiding slope (22). The flow guiding groove (24) is opened on the upper surface of the flow guiding slope (22) and the upper surface of the horizontal surface (23).

2. The prefabricated reinforcing sub-cover for a wind turbine nacelle according to claim 1, characterized in that: The rounded corners (25) are formed on the inner and outer walls of the guide grooves (24). There are seven guide grooves (24) in total, and the guide grooves (24) are parallel to each other.

3. A prefabricated reinforcing sub-cover for a wind turbine nacelle according to claim 2, characterized in that: The angle between the reinforcing sub-cover (21) and the wind turbine nacelle cover body (1) is 13°, and the horizontal plane (23) is perpendicular to the upper surface of the wind turbine nacelle cover body (1).

4. A prefabricated reinforcing sub-cover for a wind turbine nacelle according to claim 1, characterized in that: The wind turbine nacelle cover body (1) is equipped with a cleaning mechanism (3).

5. A prefabricated reinforcing sub-cover for a wind turbine nacelle according to claim 4, characterized in that: The cleaning mechanism (3) includes a heat dissipation vent (31), an inclined plate (32), a first fixed plate (33), a lead screw (34), a second fixed plate (35), a first telescopic cover (36), a second telescopic cover (37), a motor housing (38), a motor (39), a magnetic conductor (310), a permanent magnet (311), a sleeve (312), a connecting rod (313), a spring (314), a first conical block (315), and a second conical block (316). The heat dissipation vent (31) is located on the wind turbine nacelle cover body (1). On the upper surface, the inclined plate (32) is fixedly connected to the inner wall side of the reinforcing sub-cover (21), two sets of first fixing plates (33) are fixedly connected to the lower surface of the inclined plate (32), the lead screw (34) is rotatably connected to the side of the first fixing plate (33) through a bearing, the upper surface of the second fixing plate (35) is fixedly connected to the lower surface of the inclined plate (32), the first telescopic cover (36) is movably sleeved on the outer wall of the lead screw (34), and the second telescopic cover (37) is movably sleeved on the outer wall of the lead screw (34).

6. A prefabricated reinforcing sub-cover for a wind turbine nacelle according to claim 5, characterized in that: The motor housing (38) is fixedly connected to the side of the first fixing plate (33), the motor (39) is fixedly connected to the side of the motor housing (38), the magnetic conductor (310) is fixedly connected to the upper surface of the second fixing plate (35), the permanent magnet (311) is slidably connected to the upper surface of the inclined plate (32), and the sleeve (312) is fixedly connected to the side of the permanent magnet (311).

7. A prefabricated reinforcing sub-cover for a wind turbine nacelle according to claim 6, characterized in that: The connecting rod (313) is slidably connected inside the sleeve (312), the spring (314) is fixedly connected to the back of the inner wall of the sleeve (312), the first conical block (315) is fixedly connected to the side of the connecting rod (313), and the second conical block (316) is fixedly connected to the bottom of the inner wall of the inclined plate (32).

8. A prefabricated reinforcing sub-cover for a wind turbine nacelle according to claim 6, characterized in that: The magnetic conductor (310) is magnetically connected to the permanent magnet (311). The lead screw (34) moves through the first fixed plate (33). The extension end of the lead screw (34) extends to the left side of the first fixed plate (33). The extension end of the lead screw (34) is fixedly connected to the output end of the motor (39). One end of the spring (314) away from the inner wall of the sleeve (312) is fixedly connected to the front of the connecting rod (313). The two ends of the first telescopic cover (36) are fixedly connected to the sides of the first fixed plate (33) and the second fixed plate (35) respectively. The two ends of the second telescopic cover (37) are fixedly connected to the sides of the second fixed plate (35) and the first fixed plate (33) respectively. Two limiting rods are fixedly connected between the two sets of first fixed plates (33). The second fixed plate (35) is slidably connected to the outer wall of the two limiting rods.

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