Sealing structure of offshore wind power tower drum

Abstract

The utility model relates to the technical field of wind power tower drums, and discloses an offshore wind power tower drum sealing structure which comprises a wind power tower, a bottom tower drum and a cabin, a through hole is formed in the bottom tower drum, and the top end of the bottom tower drum penetrates through the through hole and extends into the bottom tower drum. According to the wind power tower, the first sealing piece and the second sealing piece shield and seal the connecting position of the bottom tower barrel and the cabin outside the wind power tower through the sealing layer, and the semi-ring cushion block and the semi-ring sealing piece form two annular structures through the connecting assembly to fill the gap between the penetrating hole and the bottom tower barrel. A closed structure is formed in the cabin, double sealing can be conducted on the connecting position of the bottom tower drum and the cabin, wet and hot air in the external environment can be effectively blocked, the second sealing component is arranged in the cabin, the second sealing component is convenient to replace and overhaul, and the service life of the second sealing component is prolonged. And the joint of the bottom tower drum and the cabin is always kept good in sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power towers, and in particular to a sealing structure of an offshore wind power tower. Background Art

[0002] The nacelle cover of a wind turbine generator set is an indispensable protective cover for the entire nacelle of a wind turbine generator set. It protects the components and electrical parts inside the nacelle from external erosion (such as wind, sand, rain, snow, salt spray, etc.), while providing maintenance space and a protective barrier for the maintenance personnel of the unit. Usually, the sealing structure between the nacelle and the tower is a brush seal, a labyrinth seal, or a seal using salt spray corrosion-resistant cloth stitching.

[0003] A Chinese invention with publication number CN114992065A discloses a sealing structure for an offshore wind turbine tower, in which a connection sealing device is provided at the connection between the nacelle cover and the tower, and three different sealing structures are provided from the outside to the inside between the cover fixing plate and the tower fixing plate for sealing, thereby achieving a step-by-step sealing effect. This not only does not affect the yaw rotation work, but also greatly improves the sealing performance of the connection between the nacelle cover and the tower, and can effectively block the hot and humid air containing salt mist from the outside, protect the internal components of the nacelle cover from corrosion, and increase the service life.

[0004] The device is designed with three layers of seals on the outside of the connection between the tower and the cabin to improve the sealing of the connection between the cabin cover and the tower. However, the sealing structure is on the outside, which causes the sealing performance of the sealing structure to be weakened due to friction, corrosion, etc., and since it is inconvenient to replace the sealing structure, it is difficult to effectively ensure the sealing of the connection between the tower and the cabin. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an offshore wind power tower sealing structure, which effectively solves the problem that the existing three-layer seal of the external design of the connection between the tower and the nacelle is used to improve the sealing of the connection between the nacelle cover and the tower. However, the sealing structure is outside, which makes the sealing performance of the sealing structure weakened due to friction, corrosion and the like. Since it is inconvenient to replace the sealing structure, it is difficult to effectively ensure the sealing of the connection between the tower and the nacelle.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an offshore wind power tower sealing structure, comprising:

[0007] A wind power tower comprises a bottom tower and a cabin. A through hole is provided in the bottom tower, and the top of the bottom tower passes through the through hole and extends to the interior of the cabin.

[0008] The fixing assembly is arranged in the cabin and is used to connect and fix the bottom tower and the cabin.

[0009] The first sealing component comprises a first sealing member fixedly connected to the bottom tower, a second sealing member fixedly connected to the cabin, and a sealing assembly, and a sealing layer is formed between the first sealing member and the second sealing member through the sealing assembly.

[0010] The second sealing component includes two semi-ring gaskets, a semi-ring seal fixedly connected to the semi-ring gaskets and a connecting assembly. The two semi-ring gaskets and the two semi-ring seals form an annular structure through the connecting assembly. The semi-ring seal is inserted between the through hole and the bottom tower.

[0011] Furthermore, the sealing assembly includes a first slot opened on the first sealing member, and a second filling block fixedly connected to the second sealing member, and one end of the second filling block away from the second sealing member is inserted into the first slot.

[0012] Furthermore, the sealing assembly also includes a first filling block fixedly connected to the first sealing member, and a second slot opened on the second sealing member, and one end of the first filling block away from the first sealing member is inserted into the second slot.

[0013] Furthermore, the connecting assembly includes connecting blocks fixedly connected to both ends of the semi-ring gasket and a second screw rod, each of the connecting blocks is provided with a first through hole, and one end of the second screw rod sequentially passes through the two first through holes and is threadedly connected with a second nut.

[0014] Furthermore, the fixing assembly includes a flange fixedly connected to the bottom tower, a connecting plate fixedly connected to the cabin and a first bolt, second through holes are provided on the flange and the connecting plate, and one end of the first bolt passes through the two second through holes in sequence and is threadedly connected with a first nut.

[0015] Furthermore, a support rod is fixedly connected to the bottom surface of the connecting plate, and a bottom end of the support rod is fixedly connected to the cabin.

[0016] Furthermore, an adjusting screw is threadedly connected to the connecting plate, an extrusion block is rotatably connected to the adjusting screw, and the bottom surface of the extrusion block is against the semi-ring gasket.

[0017] The beneficial effects of the above technical solution are:

[0018] The utility model cooperates with the first sealing component and the second sealing component, utilizes the sealing assembly to form a sealing layer between the first sealing component and the second sealing component, and enables the first sealing component and the second sealing component to shield and seal the connection between the bottom tower and the nacelle on the outside of the wind power tower through the sealing layer, and also enables the semi-ring gasket and the semi-ring sealing component to form two annular structures to fill the gap between the through hole and the bottom tower, thereby forming a closed structure inside the nacelle, which can double-seal the connection between the bottom tower and the nacelle, not only effectively block the hot and humid air in the external environment, but also the second sealing component is arranged inside the nacelle, which is convenient for replacing and repairing the second sealing component, so that the connection between the bottom tower and the nacelle is always guaranteed to have good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial cross-sectional view of the utility model;

[0020] Figure 2 For this utility model Figure 1 A magnified schematic diagram of the structure at center A;

[0021] Figure 3 It is a three-dimensional diagram of the second sealing component of the utility model.

[0022] Figure numerals: 1. bottom tower; 2. cabin; 3. flange; 4. connecting plate; 5. first sealing member; 6. first slot; 7. first filler block; 8. second sealing member; 9. second slot; 10. second filler block; 11. perforation; 12. semi-ring gasket; 13. semi-ring seal; 14. connecting block; 15. adjusting screw rod; 16. extrusion block; 17. first bolt; 18. first nut; 19. support rod; 20. second screw rod; 21. second nut. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods:

[0024] Reference Figure 1-3 , an offshore wind power tower sealing structure, including a wind power tower, a fixing assembly, a first sealing component and a second sealing component.

[0025] The wind turbine tower includes a bottom tower 1 and a nacelle 2. A through hole 11 is opened in the bottom tower 1. The top of the bottom tower 1 passes through the through hole 11 and extends to the interior of the nacelle 2. The size of the through hole 11 should be larger than the diameter of the bottom tower 1, so that the bottom tower 1 can pass through the through hole 11 and extend into the interior of the nacelle 2.

[0026] The fixing assembly is arranged in the nacelle 2 and is used to connect and fix the bottom tower 1 and the nacelle 2 .

[0027] The fixing assembly includes a flange 3 fixedly connected to the bottom tower 1, a connecting plate 4 fixedly connected to the cabin 2 and a first bolt 17. The connecting plate 4 is a plate-like structure with a through hole inside. Second through holes are provided on the flange 3 and the connecting plate 4. One end of the first bolt 17 passes through the two second through holes in sequence and is threadedly connected with a first nut 18.

[0028] The flange 3 and the connecting plate 4 can be connected and fixed by the first nut 18 and the first bolt 17 , thereby fixing the nacelle 2 on the bottom tower 1 .

[0029] The first sealing component includes a first seal 5 fixedly connected to the bottom tower 1, a second seal 8 fixedly connected to the cabin 2, and a sealing assembly. The sealing assembly is used to form a sealing layer between the first seal 5 and the second seal 8. The edges of the first seal 5 and the second seal 8 are both inclined to facilitate the flow of liquid attached to the first seal 5 or the second seal 8.

[0030] The sealing assembly includes a first slot 6 opened on the first sealing member 5, and a second filling block 10 fixedly connected to the second sealing member 8. The end of the second filling block 10 away from the second sealing member 8 is inserted into the first slot 6. The second filling block 10 can be inserted into the interior of the first slot 6 to form a sealing layer.

[0031] The sealing assembly also includes a first filling block 7 fixedly connected to the first sealing member 5 and a second slot 9 opened on the second sealing member 8. The end of the first filling block 7 away from the first sealing member 5 is inserted into the second slot 9. The first filling block 7 can be inserted into the interior of the second slot 9 to form a sealing layer.

[0032] The second sealing component includes two semi-ring gaskets 12, a semi-ring seal 13 fixedly connected to the semi-ring gaskets 12 and a connecting assembly. The two semi-ring gaskets 12 and the two semi-ring seals 13 form an annular structure through the connecting assembly. The semi-ring seal 13 is inserted between the through hole 11 and the bottom tower 1.

[0033] The connecting assembly includes a connecting block 14 and a second screw rod 20 fixedly connected to both ends of the semi-ring gasket 12. A first through hole is opened in each connecting block 14. One end of the second screw rod 20 passes through the two first through holes in sequence and is threadedly connected with a second nut 21. The second screw rod 20 and the second nut 21 can fix two adjacent connecting blocks 14, and the two semi-ring gaskets 12 and the two semi-ring seals 13 can form an annular structure.

[0034] The bottom surface of the connecting plate 4 is fixedly connected to a support rod 19, and the bottom end of the support rod 19 is fixedly connected to the cabin 2. The connecting plate 4 is supported by the support rod 19. An adjusting screw 15 is threadedly connected to the connecting plate 4. An extrusion block 16 is rotatably connected to the adjusting screw 15. The bottom surface of the extrusion block 16 is abutted against the semi-ring gasket 12.

[0035] The adjusting screw rod 15 can be spirally moved on the connecting plate 4, and the adjusting screw rod 15 can drive the extrusion block 16 to move onto the semi-ring gasket 12, and a downward pressure can be applied to the semi-ring gasket 12 to ensure the stability of the semi-ring seal 13 in the gap between the through hole 11 and the bottom tower 1.

[0036] Working principle: First, lift the cabin 2 by lifting equipment, and install the cabin 2 on the bottom tower 1 through the through hole 11. At this time, the second through hole on the connecting plate 4 and the second through hole on the flange 3 are in a matching position. Then, the second filler block 10 can be inserted into the first slot 6 to form a sealing layer, and the first filler block 7 can be inserted into the second slot 9 to form a sealing layer. At least two sealing layers are formed between the first seal 5 and the second seal 8 to improve the sealing between the first seal 5 and the second seal 8, so as to block the hot and humid air in the air. Then, the flange 3 and the connecting plate 4 are connected and fixed by the first nut 18 and the first bolt 17, and the cabin 2 is fixed on the bottom tower 1. Then, the two semi-ring gaskets 12 are both abutted against the outer wall of the bottom tower 1, and the semi-ring seal 13 is inserted into the through hole 11 and In the gap between the bottom tower 1, the second screw 20 and the second nut 21 can be used to fix the two adjacent connecting blocks 14, and the two semi-ring gaskets 12 and the two semi-ring seals 13 can form an annular structure, so that the semi-ring gasket 12 and the semi-ring seal 13 fill and seal the gap between the through hole 11 and the bottom tower 1, which can not only effectively block the hot and humid air in the external environment, but also the second sealing component is arranged inside the cabin 2, which is convenient for replacement and maintenance of the second sealing component, so that the connection between the bottom tower 1 and the cabin 2 always ensures good sealing. Finally, the adjusting screw 15 is spirally moved on the connecting plate 4, and the adjusting screw 15 drives the extrusion block 16 to move onto the semi-ring gasket 12, which can apply a downward pressure on the semi-ring gasket 12 to ensure the stability of the semi-ring seal 13 in the gap between the through hole 11 and the bottom tower 1.

Claims

1. An offshore wind power tower sealing structure, characterized in that: include: A wind turbine tower, comprising a bottom tower (1) and a nacelle (2), wherein a through hole (11) is provided in the bottom tower (1), and the top end of the bottom tower (1) passes through the through hole (11) and extends into the interior of the nacelle (2); A fixing assembly is arranged in the nacelle (2) and is used to connect and fix the bottom tower (1) and the nacelle (2); The first sealing component comprises a first sealing member (5) fixedly connected to the bottom tower (1), a second sealing member (8) fixedly connected to the nacelle (2), and a sealing assembly, wherein a sealing layer is formed between the first sealing member (5) and the second sealing member (8); The second sealing component comprises two semi-ring gaskets (12), a semi-ring sealing member (13) fixedly connected to the semi-ring gaskets (12), and a connecting assembly, wherein the two semi-ring gaskets (12) and the two semi-ring sealing members (13) form an annular structure through the connecting assembly, and the semi-ring sealing member (13) is inserted between the through hole (11) and the bottom tower (1).

2. The offshore wind power tower sealing structure according to claim 1, characterized in that: The sealing assembly comprises a first slot (6) opened on the first sealing member (5), and a second filler block (10) fixedly connected to the second sealing member (8), wherein an end of the second filler block (10) away from the second sealing member (8) is inserted into the first slot (6).

3. The offshore wind power tower sealing structure according to claim 2, characterized in that: The sealing assembly further comprises a first filling block (7) fixedly connected to the first sealing member (5), and a second slot (9) provided on the second sealing member (8), wherein an end of the first filling block (7) away from the first sealing member (5) is inserted into the second slot (9).

4. The offshore wind power tower sealing structure according to claim 1, characterized in that: The connection assembly comprises a connection block (14) fixedly connected to both ends of the semi-ring gasket (12) and a second screw rod (20), each of the connection blocks (14) being provided with a first through hole, one end of the second screw rod (20) passing through the two first through holes in sequence and being threadedly connected to a second nut (21).

5. The offshore wind power tower sealing structure according to claim 1, characterized in that: The fixing assembly comprises a flange (3) fixedly connected to the bottom tower (1), a connecting plate (4) fixedly connected to the cabin (2), and a first bolt (17), the flange (3) and the connecting plate (4) both being provided with second through holes, one end of the first bolt (17) passing through the two second through holes in sequence and being threadedly connected to a first nut (18).

6. The offshore wind power tower sealing structure according to claim 5, characterized in that: The bottom surface of the connecting plate (4) is fixedly connected to a support rod (19), and the bottom end of the support rod (19) is fixedly connected to the cabin (2).

7. The offshore wind power tower sealing structure according to claim 5, characterized in that: An adjusting screw rod (15) is threadedly connected to the connecting plate (4), and an extrusion block (16) is rotatably connected to the adjusting screw rod (15), and the bottom surface of the extrusion block (16) is in contact with the semi-ring gasket (12).

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