A protective fixing device for a wind turbine nacelle

Abstract

This invention belongs to the technical field of wind turbine nacelles, specifically a protective and securing device for wind turbine nacelles. The proposed solution includes an installation pipe on which a horizontally placed nacelle is fixed. Horizontally placed balancing mechanisms are installed on both sides of the outer top wall of the nacelle, extending along both ends of the nacelle. The center of gravity of the balancing mechanisms is shifted towards the end with stronger updraft. This invention tilts the center of gravity within the connecting box towards the end with stronger updraft to maintain stability, preventing the nacelle from loosening due to wind force differences. This improves the stability and robustness of the wind turbine nacelle during long-term use. Furthermore, the dynamic movement of rolling balls maintains balance, enhancing adaptability to wind changes.

Description

Technical Field

[0001] This invention relates to the field of wind turbine nacelle technology, and in particular to a protective fixing device for a wind turbine nacelle. Background Technology

[0002] Wind energy, as a renewable green energy source, is widely developed and utilized. Wind energy harvesting devices are processed, manufactured, and assembled into wind turbine units based on the principle of electromagnetic power generation. These units can be used to supply electricity to electrical appliances in cities or integrated into wind farms in outdoor networks and connected to the power system.

[0003] In existing technologies, wind turbine blades and generator sets are usually installed in a nacelle, and the nacelle is installed in the air via a riser. The power lines are connected to the ground through the connection between the riser and the nacelle. The wind turbine nacelle is often set in a high-altitude, windy location. However, during long-term use, because the nacelle extends out of the riser and its fixed position, there is often a difference in the updraft force on both sides of the bottom of the nacelle on the riser, which can cause the nacelle to become loose from the riser. Summary of the Invention

[0004] Based on the technical problems in the background art, the present invention proposes a protective fixing device for wind turbine nacelles.

[0005] The present invention proposes a protective fixing device for a wind turbine nacelle, including an installation pipe on which a horizontally placed nacelle is fixed. A horizontally placed balancing mechanism is provided on both sides of the outer wall of the top of the nacelle. The balancing mechanism extends along both ends of the nacelle, and the center of gravity of the balancing mechanism is shifted towards the end with greater updraft force.

[0006] Preferably, the balancing mechanism includes a connecting box, a balancing plate, and multiple rolling balls. The bottom of the connecting box is open. The middle positions of both sides of the balancing plate are rotatably connected to the side walls of the connecting box via torsion springs. The multiple rolling balls are positioned between the top of the balancing plate and the inner wall of the top of the connecting box. Baffles are fixed at both ends of the inner wall of the top of the connecting box, and contact plates are fixed at both ends of the balancing plate.

[0007] Preferably, both ends of the outer wall of the cabin can be detachably installed with a U-shaped compartment box. A connecting groove is opened at the position corresponding to the connecting box on the outer wall of the compartment box, and the contact plate extends into the compartment box. The compartment box and the outer wall of the cabin form a U-shaped connecting cavity. Multiple air holes are opened at the bottom of the connecting cavity. A sliding rod is fixed at the top position on both sides of the connecting cavity. A slider is slidably connected between the outer wall of the sliding rod and the inner wall of the connecting cavity. A spring is connected between the outer wall of the slider and the side wall of the connecting cavity. The top outer wall of the contact plate is inclined downward towards the side closer to the slider.

[0008] Preferably, the top of the balance plate is fixed with undulating blocks that are evenly distributed in the horizontal direction, and the top of the undulating blocks is set as an upwardly arched arc structure.

[0009] Preferably, the slider has a vertical part and a horizontal part. The horizontal part is fixed to the bottom position of the vertical part near the contact plate. The side of the horizontal part near the contact plate is set as an inclined part. The inclined part is set as an arc-shaped structure that arches towards the side near the contact plate and is inclined upward towards the side near the contact plate.

[0010] Preferably, multiple through-hole air slots are provided on both sides of the compartment, and the air slots are configured as upward-extending elliptical structures.

[0011] Preferably, multiple annular airbags are detachably fixed to the outside of the cabin. The airbags are arranged in a strip-shaped structure, and an air tube connects the airbags to the bottom of the cabin box.

[0012] Preferably, a connecting pipe is fixed at the bottom of the cabin corresponding to the mounting pipe, a sleeve is fixed at the bottom end of the connecting pipe, and an auxiliary plate arranged in a ring array is fixed at the bottom end of the outer wall of the sleeve; a fixing plate is fixed at the top of the outer wall of the mounting pipe, and an auxiliary groove is opened at the top of the fixing plate corresponding to the auxiliary plate.

[0013] Preferably, the cabin is provided with a detachable upper shell and a lower shell. A positioning cylinder is fixed at the middle position of the top inner wall of the upper shell and the middle position of the bottom inner wall of the lower shell. A vertically lifting floating component is provided on both sides of the bottom of the lower shell. An elastic rope is connected between the two floating components located on the same cabin. An anti-detachment strip is fixed on the outer wall of the sleeve at the position corresponding to the elastic rope.

[0014] Preferably, a perforation is provided at the bottom of the lower housing corresponding to the floating component. The floating component is provided with a floating rod and a floating umbrella. The floating rod slides in contact with the inner wall of the perforation. Limiting rings are threadedly connected to the outer wall of the floating rod at positions above and below the perforation. The floating umbrella is fixed to the top of the floating rod. Bending parts made of elastic material are fixed to both sides of the outer wall of the floating umbrella.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. In this embodiment of the invention, the center of gravity inside the connecting box is tilted towards the end with greater wind force by the set nacelle box, so as to balance the stability and avoid the nacelle from losing balance due to greater wind force at one end for a long time. This also prevents the fixed position between the nacelle and the installation pipe from loosening due to wind force difference, thereby improving the stability and firmness of the actual wind turbine nacelle during long-term use. Furthermore, the dynamic movement of the rolling ball maintains the balance and improves the adaptability to wind force changes.

[0017] 2. In this embodiment of the invention, by setting multiple undulating blocks, on the one hand, the rolling ball generates a bouncing vibration in the vertical direction when rolling towards one end, so as to buffer the impact intensity of external wind force on the entire shell and improve the stability of the actual protective installation. On the other hand, the multiple rolling balls move at intervals when rolling towards one end, rather than rolling together as a whole, so as to improve the change of balance state through the rolling impact of multiple rolling balls at different positions, thereby enhancing the actual buffering and protection effect against external wind force impact.

[0018] 3. In this embodiment of the invention, airbags distributed and wrapped around the outside of the cabin buffer the impact of external wind force, and the airbags compressed by wind pressure are sent from the bottom into the cabin box through the air pipe connection to increase the airflow effect in the cabin box, thereby ensuring the sliding block moves to achieve a balanced and stable protective effect.

[0019] 4. In this embodiment of the invention, the floating components and elastic ropes are used to buffer the wind force difference on both sides of the nacelle. The elastic ropes are used to pull from the end with less wind force to the end with more wind force to counteract the upward wind force at the end with more wind force, thereby further enhancing the stability of the actual wind turbine nacelle and the protection effect for long-term use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a protective fixing device for a wind turbine nacelle proposed in this invention.

[0021] Figure 2 This is a schematic diagram of the housing and balancing mechanism of a protective fixing device for a wind turbine nacelle proposed in this invention;

[0022] Figure 3 This is a schematic diagram of the housing structure of a protective fixing device for a wind turbine nacelle proposed in this invention;

[0023] Figure 4 This is a schematic diagram of the balancing mechanism structure of a protective fixing device for a wind turbine nacelle proposed in this invention;

[0024] Figure 5 This is a cross-sectional view of the connection box of the protective fixing device for a wind turbine nacelle proposed in this invention.

[0025] Figure 6 This is a schematic diagram of the slider and contact plate structure of a protective fixing device for a wind turbine nacelle proposed in this invention;

[0026] Figure 7 This is a schematic diagram of the slider structure of a protective fixing device for a wind turbine nacelle proposed in this invention;

[0027] Figure 8This is a schematic diagram of the nacelle and connecting pipe structure of a protective fixing device for a wind turbine nacelle proposed in this invention;

[0028] Figure 9 This is a schematic diagram of the installation pipe structure of a protective fixing device for a wind turbine nacelle proposed in this invention;

[0029] Figure 10 This is a schematic diagram of the nacelle and airbag structure of a protective fixing device for a wind turbine nacelle proposed in this invention;

[0030] Figure 11 This is a schematic diagram of the lower shell and elastic rope distribution structure of a protective fixing device for a wind turbine nacelle proposed in this invention;

[0031] Figure 12 This is a schematic diagram of the floating component structure of a protective fixing device for a wind turbine nacelle proposed in this invention.

[0032] In the diagram: 1. Mounting pipe, 2. Cabin, 201. Head, 202. Tail, 3. Connecting pipe, 4. Cabin box, 401. Upper shell, 402. Lower shell, 5. Connecting cavity, 6. Balancing mechanism, 7. Connecting box, 8. Balancing plate, 9. Fixing block, 10. Contact plate, 11. Rolling ball, 12. Baffle, 13. Undulating block, 14. Limiting block, 15. Positioning cylinder, 16. Positioning block, 17. Connecting groove, 18. Sliding rod, 19. Sliding block, 191. Vertical part, 192. Horizontal part, 20. Spring, 21. Air hole, 22. Air duct, 23. Sleeve, 24. Auxiliary plate, 25. Fixing plate, 26. Auxiliary groove, 27. Airbag, 28. Air pipe, 29. Floating component, 30. Elastic rope, 31. Anti-detachment strip, 32. Floating rod, 33. Floating umbrella, 34. Limiting ring, 35. Bending component. Detailed Implementation

[0033] Example 1

[0034] Reference Figure 1 A protective fixing device for a wind turbine nacelle includes an installation pipe 1, the bottom end of which is integrally formed with a supporting riser. A horizontally placed nacelle 2 is fixed on the installation pipe 1. One end of the nacelle 2 is configured as the head 201 for fixing the wind turbine blades, and the other end is configured as the tail 202. Horizontally placed balancing mechanisms 6 are provided on both sides of the top outer wall of the nacelle 2. The balancing mechanisms 6 extend along both ends of the nacelle 2, and the center of gravity of the balancing mechanisms 6 is shifted towards the end with stronger updraft winds. (Refer to...) Figure 2 and Figures 4-5The balancing mechanism 6 includes a connecting box 7, a balancing plate 8, and multiple balls 11. The connecting box 7 has an opening at its bottom. Fixing blocks 9 are fixed to the middle positions of both sides of the balancing plate 8. The fixing blocks 9 are rotatably connected to the side walls of the connecting box 7 via torsion springs. A gap is left between the bottom of the balancing plate 8 and the top outer wall of the cabin 2. The multiple balls 11 are positioned between the top of the balancing plate 8 and the top inner wall of the connecting box 7. Baffles 12 are fixed to both ends of the top inner wall of the connecting box 7. Contact plates 10 are fixed to both ends of the balancing plate 8. (Refer to...) Figures 1-3 Both ends of the outer wall of the cabin 2 are detachably fitted with U-shaped compartment boxes 4. The two compartment boxes 4 are located on both sides of the outer wall of the mounting tube 1. A connecting groove 17 is provided on the outer wall of the compartment box 4 at the position corresponding to the connecting box 7, and the contact plate 10 extends into the compartment box 4; see reference. Figures 2-3 The cabin box 4 and the outer wall of the cabin 2 form a U-shaped connecting cavity 5. The top of the connecting cavity 5 has an upper horizontal cavity, the bottom of the connecting cavity 5 has a lower horizontal cavity, and both sides of the connecting cavity 5 are vertical cavities. Multiple air vents 21 are opened at the bottom of the connecting cavity 5. (Refer to...) Figures 6-7 A sliding rod 18 is fixed at the top of each side of the connecting cavity 5. A slider 19 is slidably connected between the outer wall of the sliding rod 18 and the inner wall of the connecting cavity 5. A spring 20 is connected between the outer wall of the slider 19 and the side wall of the connecting cavity 5. The slider 19 is positioned between the contact plate 10 and the vertical cavity. The outer wall of the slider 19 is in slidable contact with the inner wall of the upper horizontal cavity. The spring 20 is positioned on the side of the slider 19 closest to the vertical cavity, so that the sliders 19 on both sides can block the two sides of the upper horizontal cavity. The top outer wall of the contact plate 10 is inclined downward towards the side closest to the slider 19. Thus, in actual use, the two cabin boxes 4 are distributed outside the cabin 2 on both sides of the mounting pipe 1, that is, the two cabin boxes 4 are close to the head 201 and the tail 202 respectively. During a long period of time, when the cabin 2, which is installed at high altitude through the riser, is subjected to a long-term upward wind force, the upward wind force enters the cabin box 4 through the wind hole 21 and rises along the vertical cavity. The upward horizontal cavity is squeezed by the slider 19. Due to the influence of the nacelle 2 and the operation of the engine set or changes in wind force, the upward wind force at both ends of the nacelle 2 will be different, which will cause the slider 19 corresponding to the two ends of the connecting box 7 to push inward with different strength. This causes the slider 19 corresponding to the end of the nacelle 2 with greater upward wind force to slide inward and squeeze the corresponding contact plate 10 downward, so that the balance plate 8 tilts downward towards the end with greater wind force, so that the ball 11 in the connecting box 7 rolls down towards the end with greater wind force. This causes the center of gravity in the connecting box 7 to tilt towards the end with greater wind force to balance stability and prevent the nacelle 2 from losing balance due to greater wind force at one end for a long time. This also prevents the fixed position between the nacelle 2 and the mounting pipe 1 from loosening due to wind force difference, thereby improving the stability and firmness of the actual wind turbine nacelle during long-term use. Furthermore, the dynamic movement of the ball 11 maintains balance and improves the adaptability to wind force changes.

[0035] Example 2

[0036] Based on Example 1, referring to Figure 5 A protective fixing device for a wind turbine nacelle is provided. The top of the balance plate 8 is fixed with horizontally distributed undulating blocks 13. The top of the undulating blocks 13 is set in an upward arched arc structure. Limiting blocks 14 are fixed at both ends of the top outer wall of the balance plate 8 and both ends of the top inner wall of the connecting box 7 to prevent the rolling balls 11 from running out. By setting multiple undulating blocks 13, on the one hand, the rolling balls 11 generate bouncing vibration in the vertical direction when rolling to one end, so as to buffer the impact intensity of external wind force on the entire shell and improve the stability of the actual protective installation. On the other hand, the multiple rolling balls 11 move at intervals when rolling to one end, rather than rolling together as a whole, so as to improve the change of balance state through the rolling impact of multiple rolling balls 11 at different positions, so as to enhance the actual buffering and protection effect against external wind force impact.

[0037] Example 3

[0038] Based on Example 1, referring to Figure 7 A protective fixing device for a wind turbine nacelle includes a slider 19 having a vertical part 191 and a horizontal part 192. The horizontal part 192 is fixed to the bottom of the vertical part 191 near the contact plate 10. The outer wall of the vertical part 191 slides in contact with the inner wall of the upper horizontal cavity. The side of the horizontal part 192 near the contact plate 10 is set as an inclined part, which is an arc-shaped structure arched towards the side near the contact plate 10. The inclined part is inclined upward towards the side near the contact plate 10. By utilizing the inclined arc-shaped structure of the horizontal part 192 near the contact plate 10, the side of the corresponding contact plate 10 has a vertical clearance to avoid jamming and to prevent the balance plate 8 from tilting due to external vibration, thus ensuring the effectiveness of the actual balance mechanism 6 during long-term use and further improving the stability and long-term effectiveness of the actual protective fixing.

[0039] Example 4

[0040] Based on Example 1, referring to Figures 2-3 A protective fixing device for a wind turbine nacelle is provided. Multiple penetrating wind ducts 22 are provided on both sides of the nacelle box 4. The wind ducts 22 are configured as upward-extending elliptical structures. When the nacelle 2 is subjected to lateral wind force, the wind ducts 22 extend upward to push the slider 19 to move. The vertical extension of the wind ducts 22 also allows for convection with the rising wind force of the wind hole 21 to buffer the wind, thereby improving the dispersion and buffering protection effect against wind impacts outside the nacelle 2.

[0041] Example 5

[0042] Based on Example 1, referring to Figure 1 and Figure 10 A protective fixing device for a wind turbine nacelle is provided. Multiple annular airbags 27 are detachably fixed to the outside of the nacelle 2. The airbags 27 are arranged in a strip-shaped structure. An air pipe 28 is connected between the airbags 27 and the bottom of the nacelle box 4. In actual use, the airbags 27 distributed and wrapped around the outside of the nacelle 2 buffer the impact of external wind force. The airbags 27 are compressed by wind pressure and sent from the bottom to the nacelle box 4 through the air pipe 28 to increase the airflow effect inside the nacelle box 4, thereby ensuring the sliding block 19 moves to balance and stabilize the protective effect.

[0043] Example 6

[0044] Based on any one or more of the above embodiments, refer to Figure 1 and Figures 8-9 A protective fixing device for a wind turbine nacelle is disclosed. A connecting pipe 3 is fixed at the bottom of the nacelle 2 corresponding to the mounting pipe 1. A sleeve 23 is fixed at the bottom end of the connecting pipe 3. The inner wall of the sleeve 23 slides in contact with the top of the outer wall of the mounting pipe 1. An auxiliary plate 24 distributed in a ring array is fixed at the bottom end of the outer wall of the sleeve 23. A fixing plate 25 is fixed at the top of the outer wall of the mounting pipe 1. An auxiliary groove 26 is opened at the top of the fixing plate 25 corresponding to the auxiliary plate 24. The auxiliary plate 24 and the fixing plate 25 are fixed together by bolts. By fitting the sleeve 23 at the bottom of the nacelle 2 onto the top of the mounting pipe 1, the auxiliary plate 24 is embedded in the auxiliary groove 26 and fixed with bolts. This fixes the nacelle 2 to the mounting pipe 1 connected to the riser. The matching auxiliary plate 24 and auxiliary groove 26 prevent the nacelle 2 from being torsionally pulled in the circumferential direction by wind changes, thus preventing the fixing position from loosening. This further improves the stability and firmness of the actual protective fixing.

[0045] In this invention, reference is made to Figure 3 The compartment 4 is provided with a detachable upper shell 401 and a lower shell 402. Positioning cylinders 15 are fixed at the middle position of the top inner wall of the upper shell 401 and the middle position of the bottom inner wall of the lower shell 402, respectively. Figure 8 A positioning block 16 is fixed to the outer wall of the cabin 2 at a position corresponding to the positioning cylinder 15. The positioning cylinder 15 and the positioning block 16 are threaded together. The connecting box 7 is connected to the two upper shells 401. The air vent 21 is opened at the bottom of the lower shell 402. Floating components 29 that can be vertically raised and lowered are provided on both sides of the bottom of the lower shell 402. An elastic rope 30 is connected between the two floating components 29 located on the same cabin box 4. An anti-detachment strip 31 corresponding to the position of the elastic rope 30 is fixed to the outer wall of the sleeve 23. (Refer to...) Figures 11-12A perforation is provided at the bottom of the lower housing 402 corresponding to the floating assembly 29. The floating assembly 29 is provided with a floating rod 32 and a floating umbrella 33. The floating rod 32 slides in contact with the inner wall of the perforation. Limiting rings 34 are threadedly connected to the outer wall of the floating rod 32 above and below the perforation. The floating umbrella 33 is fixed to the top of the floating rod 32. The floating umbrella 33 is designed as an upwardly arched arc structure. Bending parts 35 made of elastic material are fixed on both sides of the outer wall of the floating umbrella 33. The bending parts 35 bend away from the center of the floating umbrella 33. In actual use, the bottom ends of the floating rods 32 on both sides of the same compartment 4 are connected by elastic ropes 30, and the elastic ropes 30 are wrapped around the other side of the sleeve 23. Under normal conditions, the floating rods 32 on both sides hang down naturally. When there is a difference in upward wind force on both sides of the nacelle 4, the floating umbrella 33 and floating rod 32 on the corresponding sides slide upward to pull the elastic rope 30 for buffering, thereby buffering the difference in wind force on both sides of the nacelle 2. Furthermore, by setting the nacelle 4 and elastic rope 30 at both ends of the mounting pipe 1, when the upward wind force is greater at one end, the elastic rope 30 is used to pull from the end with less upward wind force to the end with greater wind force to counteract the upward wind force at the end with greater wind force, thereby further enhancing the stability of the actual wind turbine nacelle and the protection effect for long-term use. In addition, the bending component 35 made of elastic material is used to make the floating umbrella 33 swing in a circle. During this process, the bending component 35 contacts the outer wall of the nacelle 2 and the inner wall of the nacelle 4 for buffering, thereby improving the impact of wind impact on the stability of the nacelle 2.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A protective fixing device for a wind turbine nacelle, comprising an installation pipe (1), wherein a horizontally placed nacelle (2) is fixed on the installation pipe (1), characterized in that, The top outer wall of the cabin (2) is provided with horizontally placed balancing mechanisms (6) on both sides. The balancing mechanisms (6) extend along both ends of the cabin (2). The center of gravity of the balancing mechanisms (6) is shifted towards the end with greater updraft force. The balancing mechanism (6) is provided with a connecting box (7), a balancing plate (8) and multiple balls (11). The bottom end of the connecting box (7) is open. The middle positions of both sides of the balancing plate (8) are rotatably connected to the side wall of the connecting box (7) by torsion springs. The multiple balls (11) are located between the top of the balancing plate (8) and the top inner wall of the connecting box (7). Baffles (12) are fixed at both ends of the top inner wall of the connecting box (7). Contact plates (10) are fixed at both ends of the balancing plate (8). Both ends of the outer wall of the cabin (2) are detachably installed with a U-shaped cabin box (4). The outer wall of the cabin box (4) is provided with a connecting groove (17) corresponding to the connecting box (7). The contact plate (10) extends into the cabin box (4). The cabin box (4) and the outer wall of the cabin (2) form a U-shaped connecting cavity (5). The bottom of the connecting cavity (5) is provided with multiple air holes (21). The top positions of both sides of the connecting cavity (5) are fixed with sliding rods (18). The outer wall of the sliding rod (18) is slidably connected to the inner wall of the connecting cavity (5). The outer wall of the sliding rod (19) is connected to the side wall of the connecting cavity (5) with a spring (20). The top outer wall of the contact plate (10) is inclined downward towards the side closer to the sliding rod (19).

2. The protective fixing device for a wind turbine nacelle according to claim 1, characterized in that, The top of the balance plate (8) is fixed with undulating blocks (13) that are evenly distributed in the horizontal direction, and the top of the undulating blocks (13) is set as an upward arched arc structure.

3. The protective fixing device for a wind turbine nacelle according to claim 1, characterized in that, The slider (19) is provided with a vertical part (191) and a horizontal part (192). The horizontal part (192) is fixed at the bottom of the vertical part (191) near the contact plate (10). The side of the horizontal part (192) near the contact plate (10) is provided as an inclined part. The inclined part is provided as an arc-shaped structure that arches towards the side near the contact plate (10). The inclined part is inclined upward towards the side near the contact plate (10).

4. The protective fixing device for a wind turbine nacelle according to claim 1, characterized in that, The two sides of the compartment (4) are provided with multiple through-hole air slots (22), and the air slots (22) are configured as an upwardly extending elliptical structure.

5. The protective fixing device for a wind turbine nacelle according to claim 1, characterized in that, The cabin (2) is detachably fixed with multiple ring-shaped airbags (27). The airbags (27) are arranged in a strip-shaped structure. An air tube (28) is connected between the airbags (27) and the bottom of the cabin box (4).

6. A protective fixing device for a wind turbine nacelle according to any one of claims 1 to 5, characterized in that, A connecting pipe (3) is fixed at the bottom of the cabin (2) at the position corresponding to the mounting pipe (1). A sleeve (23) is fixed at the bottom end of the connecting pipe (3). An auxiliary plate (24) with a ring array is fixed at the bottom end of the outer wall of the sleeve (23). A fixing plate (25) is fixed to the top of the outer wall of the installation tube (1), and an auxiliary groove (26) is provided at the top of the fixing plate (25) corresponding to the auxiliary plate (24).

7. A protective fixing device for a wind turbine nacelle according to claim 6, characterized in that, The cabin (4) is provided with a detachable upper shell (401) and a lower shell (402). Positioning cylinders (15) are fixed at the middle position of the top inner wall of the upper shell (401) and the middle position of the bottom inner wall of the lower shell (402). Floating components (29) that can be raised and lowered vertically are provided on both sides of the bottom of the lower shell (402). Elastic ropes (30) are connected between the two floating components (29) located on the same cabin (4). Anti-detachment strips (31) corresponding to the positions of the elastic ropes (30) are fixed on the outer wall of the sleeve (23).

8. The protective fixing device for a wind turbine nacelle according to claim 7, characterized in that, The bottom of the lower housing (402) is provided with a perforation at the position corresponding to the floating assembly (29). The floating assembly (29) is provided with a floating rod (32) and a floating umbrella (33). The floating rod (32) slides in contact with the inner wall of the perforation. The outer wall of the floating rod (32) is threaded with limit rings (34) at the positions above and below the perforation. The floating umbrella (33) is fixed at the top of the floating rod (32). Both sides of the outer wall of the floating umbrella (33) are fixed with bending parts (35) made of elastic material.

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