Offshore wind turbine flange connection sealing anti-infiltration device

Abstract

This utility model relates to a sealing and seepage prevention device for a flange connection of an offshore wind turbine, belonging to the field of flange technology. It includes a wind turbine main shaft, with a flange connection assembly at the end of the main shaft. The flange connection assembly includes a first flange fixedly connected to the outer wall of the main shaft and a cast iron ring sleeved on the outside of the first flange. A second flange corresponding to the first flange is fixedly connected to the inner side of the cast iron ring. An annular filling groove is formed on the outer wall of the first flange, and a through hole is formed on the outer wall of the cast iron ring. A filling post is inserted into the inner side of the through hole. A conical protective ring is elastically installed on the outer wall of the first flange. This sealing and seepage prevention device for an offshore wind turbine flange solves the problem that conventional wind turbine flanges use a sealing ring, which is prone to deformation under long-term erosion from high-pressure airflow at sea, potentially leading to seal damage and affecting its sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, specifically to a sealing and anti-seepage device for offshore wind turbine flange connections. Background Technology

[0002] A flange is a common component used to connect shafts. Flange connections are a method of fastening two components together with bolts and transmitting a certain torque. Due to their high reliability and ease of disassembly, flanges are widely used in new energy, power, and aerospace fields. In wind turbine generators, flanges are also ubiquitous in the splicing and assembly of various components. Wind turbine flanges can be classified according to their application and structural characteristics, including tower flanges, hub flanges, blade flanges, tower base flanges, generator flanges, and pitch frame flanges.

[0003] The pitch frame flange is used to connect the pitch frame to the wind turbine main shaft, mainly controlling the angle and speed of the blades. The pitch frame flange is usually located outside the pitch turbine protective cover. In order to prevent high-pressure airflow from entering its interior and damaging the components, it is necessary to ensure the sealing of the flange connection. The conventional sealing structure of wind turbine flanges is a sealing ring. However, under the long-term erosion of high-pressure airflow at sea, the sealing ring is prone to deformation, and in severe cases, it may be damaged, affecting its sealing performance. Therefore, a sealing and anti-seepage device for offshore wind turbine flange connection is proposed to solve the problems mentioned above. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a sealing and seepage prevention device for offshore wind turbine flange connections. It has advantages such as good sealing performance and solves the problem that the sealing structure of conventional wind turbine flanges is a sealing ring, which is prone to deformation under long-term erosion by high-pressure airflow at sea, and may even break in severe cases, affecting its sealing performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing and seepage prevention device for a flange connection of an offshore wind turbine, comprising a wind turbine main shaft, wherein a flange connection assembly is provided at the end of the wind turbine main shaft;

[0006] The flange connection assembly includes a first flange fixedly connected to the outer wall of the main shaft of the wind turbine and a cast iron ring sleeved on the outside of the first flange. A second flange corresponding to the first flange is fixedly connected to the inner side of the cast iron ring. An annular filling groove is formed on the outer wall of the first flange. A through hole is formed on the outer wall of the cast iron ring. A filling post is inserted into the inner side of the through hole. A conical protective ring is elastically installed on the outer wall of the first flange.

[0007] Furthermore, an annular sealing ring, which is a rubber sealing ring, is provided between the first flange and the second flange.

[0008] Furthermore, the first flange, the second flange, and the annular sealing ring each have several mounting holes on their inner sides, and these mounting holes are distributed in a ring along their end faces.

[0009] Furthermore, the inner wall of the cast iron ring is adapted to the first flange, and the filling column is adapted to the inner side of the through hole.

[0010] Furthermore, when the first flange is located inside the cast iron ring, the through hole is opposite to the annular filling groove, and the interior of the annular filling groove is filled with sealant.

[0011] Furthermore, a connecting plate is fixedly connected to the top of the filling column.

[0012] Furthermore, the conical protective ring is sleeved on the outer wall of the main shaft of the fan, and a number of elastic components are provided at the end of the conical protective ring near the first flange, and the number of elastic components are distributed in a ring along its end face.

[0013] Furthermore, the elastic component includes a buffer spring and a telescopic rod disposed inside the buffer spring, with both ends of the buffer spring being fixedly connected to the first flange and the conical protective ring, respectively.

[0014] Compared with the prior art, this utility model provides a sealing and anti-seepage device for offshore wind turbine flange connections, which has the following beneficial effects:

[0015] 1. This offshore wind turbine flange connection sealing and seepage prevention device adds sealant to the inside of the annular filling groove through the through hole. After the annular filling groove is filled, the through hole of the filling column is matched, and then the connecting plate is welded and fixed to the outer wall of the cast iron ring. The sealant in the annular filling groove fills the small gap between the first flange and the cast iron ring, forming a sealed space at the location of the annular sealing ring. It has excellent sealing and seepage prevention performance and solves the problem that the sealing structure of conventional wind turbine flanges is a sealing ring, which is prone to deformation under long-term erosion of high-pressure airflow at sea, and may even cause the sealing ring to break in severe cases, affecting its sealing performance.

[0016] 2. The sealing and seepage prevention device for the offshore wind turbine flange connection, when the first flange is subjected to high-pressure airflow at sea, the high-pressure airflow pushes the conical protective ring to move and squeezes the buffer spring, causing the telescopic rod to retract. When part of the high-pressure airflow passes through the inclined surface of the conical protective ring, the direction of the airflow is changed, which plays a certain role in diverting the flow, reducing the impact of the high-pressure airflow, reducing the impact of the high-pressure airflow on the first flange, and ensuring the stability of the structure. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the combined structure of the flange connection assembly of this utility model;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of the flange connection assembly of this utility model;

[0020] Figure 4 This is a schematic diagram of the conical protective ring of this utility model;

[0021] Figure 5 This utility model Figure 4 A magnified structural diagram of structure A is shown.

[0022] In the diagram: 1. Fan main shaft; 2. First flange; 3. Cast iron ring; 4. Second flange; 5. Annular sealing ring; 6. Mounting hole; 7. Annular filling groove; 8. Through hole; 9. Filling column; 10. Connecting plate; 11. Conical protective ring; 12. Buffer spring; 13. Telescopic rod. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1 to 5 This embodiment of a sealing and seepage prevention device for a offshore wind turbine flange connection includes a wind turbine main shaft 1. A flange connection assembly is provided at the end of the wind turbine main shaft 1. The flange connection assembly includes a first flange 2 fixedly connected to the outer wall of the wind turbine main shaft 1 and a cast iron ring 3 sleeved on the outside of the first flange 2. The inner wall of the cast iron ring 3 is adapted to the first flange 2. A second flange 4 corresponding to the first flange 2 is fixedly connected to the inner side of the cast iron ring 3. An annular filling groove 7 is provided on the outer wall of the first flange 2. A through hole 8 is provided on the outer wall of the cast iron ring 3. A filling column 9 is inserted into the inner side of the through hole 8. The filling column 9 is adapted to the inner side of the through hole 8. A connecting plate 10 is fixedly connected to the top of the filling column 9. A conical protective ring 11 is elastically installed on the outer wall of the first flange 2.

[0025] Among them, the inner sides of the first flange 2, the second flange 4 and the annular sealing ring 5 are provided with a number of mounting holes 6, which are distributed in a ring along their end faces for connection with bolts.

[0026] It should be noted that when the first flange 2 is located inside the cast iron ring 3, the through hole 8 is opposite to the annular filling groove 7. The annular filling groove 7 is filled with sealant, which can fill the small gaps between the first flange 2 and the cast iron ring 3, thus improving the sealing performance of the structure.

[0027] Understandably, after the first flange 2 is assembled inside the cast iron ring 3, sealant can be added to the inside of the annular filling groove 7 through the through hole 8. After the annular filling groove 7 is filled, the filling column 9 is matched with the through hole 8, and the connecting plate 10 can be welded and fixed to the outer wall of the cast iron ring 3, thus ensuring the sealing performance of the sealant.

[0028] An annular sealing ring 5 is provided between the first flange 2 and the second flange 4. The annular sealing ring 5 is a rubber sealing ring and plays a sealing role. At the same time, the sealant in the annular filling groove 7, which is located between the first flange 2, the second flange 4 and the cast iron ring 3, fills the small gaps between the first flange 2 and the cast iron ring 3, forming a sealed space at the location of the annular sealing ring 5. This prevents it from contacting the external high-pressure airflow, resulting in excellent anti-seepage performance, greatly extending the service life of the annular sealing ring 5 and playing a good sealing role.

[0029] In this embodiment, the conical protective ring 11 is sleeved on the outer wall of the main shaft 1 of the wind turbine. Several sets of elastic components are provided at the end of the conical protective ring 11 near the first flange 2. The several sets of elastic components are distributed in a ring along its end face. The elastic components include a buffer spring 12 and a telescopic rod 13 disposed inside the buffer spring 12. The two ends of the buffer spring 12 are fixedly connected to the first flange 2 and the conical protective ring 11, respectively. When the first flange 2 is subjected to high-pressure airflow at sea, the high-pressure airflow pushes the conical protective ring 11 to move and squeezes the buffer spring 12, causing the telescopic rod 13 to contract. When part of the high-pressure airflow passes through the inclined surface of the conical protective ring 11, the direction of the airflow is changed, which plays a certain role in diverting the flow, reducing the impact of the high-pressure airflow, reducing the impact of the high-pressure airflow on the first flange 2, and improving the stability of the structure.

[0030] The working principle of the above embodiments is as follows:

[0031] In use, the first flange 2 and the conical protective ring 11 are fitted onto the outer wall of the wind turbine main shaft 1, and the first flange 2 and the wind turbine main shaft 1 are welded and fixed. The second flange 4 and the cast iron ring 3 are welded and fixed to the outside of the pitch turbine protective cover. The annular sealing ring 5 is laid on the second flange 4 inside the cast iron ring 3. One end of the wind turbine main shaft 1 is located at the first flange 2 and mates with the inner side of the cast iron ring 3. At the same time, both sides of the annular sealing ring 5 are tightly fitted with the end faces of the first flange 2 and the second flange 4, respectively. The annular filling groove 7 on the side of the first flange 2 is opposite to the through hole 8. Sealant can be added to the inside of the annular filling groove 7 through the through hole 8. When the annular filling groove 7 is filled, the filling column 9 is inserted through... The holes 8 are matched, and the connecting plate 10 is welded and fixed to the outer wall of the cast iron ring 3. The sealant in the annular filling groove 7 fills the small gap between the first flange 2 and the cast iron ring 3, forming a sealed space at the position of the annular sealing ring 5. The sealing and seepage prevention performance is excellent. At the same time, when the first flange 2 is subjected to high-pressure airflow at sea, the high-pressure airflow pushes the conical protective ring 11 to move and squeezes the buffer spring 12, causing the telescopic rod 13 to retract. When part of the high-pressure airflow passes through the inclined surface of the conical protective ring 11, the direction of the airflow is changed, which plays a certain role in diverting the flow, reducing the impact of the high-pressure airflow, reducing the impact of the high-pressure airflow on the first flange 2, and ensuring the stability of the structure.

[0032] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that can achieve its beneficial effects can be implemented. It should be noted that the orientation or positional relationship indicated herein is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

Claims

1. A sealing and seepage prevention device for a flange connection of an offshore wind turbine, characterized in that: Includes a fan main shaft (1), the end of which is provided with a flange connection assembly; The flange connection assembly includes a first flange (2) fixedly connected to the outer wall of the main shaft (1) of the fan and a cast iron ring (3) sleeved on the outside of the first flange (2). A second flange (4) corresponding to the first flange (2) is fixedly connected to the inner side of the cast iron ring (3). An annular filling groove (7) is provided on the outer wall of the first flange (2). A through hole (8) is provided on the outer wall of the cast iron ring (3). A filling column (9) is inserted into the inner side of the through hole (8). A conical protective ring (11) is elastically installed on the outer wall of the first flange (2).

2. The offshore wind turbine flange connection sealing and seepage prevention device according to claim 1, characterized in that: An annular sealing ring (5) is provided between the first flange (2) and the second flange (4), and the annular sealing ring (5) is a rubber sealing ring.

3. The sealing and seepage prevention device for offshore wind turbine flange connection according to claim 2, characterized in that: The inner sides of the first flange (2), the second flange (4) and the annular sealing ring (5) are provided with a number of mounting holes (6), and the number of mounting holes (6) are distributed in a ring along their end faces.

4. The sealing and seepage prevention device for offshore wind turbine flange connection according to claim 1, characterized in that: The inner wall of the cast iron ring (3) is adapted to the first flange (2), and the filling column (9) is adapted to the inner side of the through hole (8).

5. The offshore wind turbine flange connection sealing and seepage prevention device according to claim 1, characterized in that: When the first flange (2) is located inside the cast iron ring (3), the through hole (8) is opposite to the annular filling groove (7), and the interior of the annular filling groove (7) is filled with sealant.

6. The sealing and seepage prevention device for offshore wind turbine flange connection according to claim 1, characterized in that: The top of the filling column (9) is fixedly connected to a connecting plate (10).

7. The offshore wind turbine flange connection sealing and seepage prevention device according to claim 1, characterized in that: The conical protective ring (11) is sleeved on the outer wall of the fan main shaft (1). The conical protective ring (11) is provided with a number of elastic components at one end near the first flange (2). The number of elastic components are distributed in a ring along its end face.

8. The sealing and seepage prevention device for offshore wind turbine flange connection according to claim 7, characterized in that: The elastic component includes a buffer spring (12) and a telescopic rod (13) disposed inside the buffer spring (12). The two ends of the buffer spring (12) are fixedly connected to the first flange (2) and the conical protective ring (11), respectively.

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