Sealing structure between fairing and cabin cover

Abstract

The utility model relates to the technical field of sealing structures, and provides a sealing structure between a fairing and a cabin cover. The telescopic device comprises a telescopic head and a sealing groove, the telescopic head is assembled in an outlet of the flow guide cover, and a pneumatic plate is fixedly assembled in the telescopic head; the sealing groove is fixedly assembled at an inlet of a cabin cover, the outlet end of the telescopic head is assembled in the sealing groove in a sliding mode, and a gap is reserved between the telescopic head and the bottom wall of the sealing groove. The telescopic head abuts against the side wall of the sealing groove when retracting. Air flow drives the telescopic head to stretch out through the pneumatic plate, meanwhile, the internal air flow reversely penetrates through the gap between the flow guide cover and the cabin cover, external air is prevented from entering, and the sealing structure between the flow guide cover and the cabin cover can use different sealing methods according to the relative movement condition between the flow guide cover and the cabin cover. The sealing effect is ensured; and meanwhile, the abrasion between the two parts is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, in particular to a sealing structure between a fairing and a nacelle cover. Background Technique

[0002] The fairing and the nacelle cover are important components of a wind turbine. Since wind turbines are mostly installed in offshore locations, to prevent the equipment from being corroded by sea salt particles in the marine atmosphere, it is necessary to increase the sealing performance between the two. At the same time, during the operation of the wind turbine, relative rotation occurs between the fairing and the nacelle cover, further increasing the sealing difficulty.

[0003] In the prior art, the patent number CN202545131U discloses a sealing structure between a fairing and a nacelle cover. It makes the gap between the fairing and the nacelle cover narrower and longer through staggered sealing plates, and cooperates with a brush to achieve the sealing effect. However, the sealing effect of the brush on gases is poor, and the narrowing and lengthening of the gap can only reduce the passing efficiency of gases and does not improve the sealing effect. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sealing structure between a fairing and a nacelle cover. This sealing structure between the fairing and the nacelle cover can use different sealing methods according to the relative movement between the fairing and the nacelle cover to achieve the sealing effect, ensuring the sealing effect while greatly reducing the wear between the two.

[0005] The utility model provides a sealing structure between a fairing and a nacelle cover, including:

[0006] A telescopic head, which is assembled inside the outlet of the fairing, and a pneumatic plate is fixedly assembled inside the telescopic head;

[0007] A sealing groove, which is fixedly assembled at the entrance of the nacelle cover. The outlet end of the telescopic head is slidably assembled inside the sealing groove, and there is a gap between the telescopic head and the bottom wall of the sealing groove;

[0008] When the telescopic head is in the retracted state, the telescopic head abuts against the side wall of the sealing groove; the airflow drives the telescopic head to extend through the pneumatic plate. After the telescopic head extends, it does not contact the sealing groove, and at the same time, the internal airflow reversely passes through the gap between the fairing and the nacelle cover, inhibiting the entry of external gases.

[0009] Preferably, the sealing structure between the fairing and the nacelle cover further includes a spring. The two ends of the spring respectively abut against the telescopic head and the fairing, and the spring force pushes the telescopic head to move towards the retracted state.

[0010] Preferably, the fairing is located directly below the nacelle hood, the spring is replaced with a counterweight, and the counterweight is fixedly connected to the telescopic head.

[0011] Preferably, the sealing structure between the fairing and the nacelle hood further includes a first sealing brush, the first sealing brush is assembled on the outer wall of the telescopic head, and the bristles of the first sealing brush abut against the bottom wall of the sealing groove.

[0012] Preferably, the bottom wall of the sealing groove has a draft angle, the dimension of the bottom wall of the sealing groove is larger on the side away from the fairing, and there is a gap between the bristles of the first sealing brush and the bottom wall of the sealing groove when the telescopic head is in the extended state.

[0013] Preferably, the pneumatic plate is annular, and the pneumatic plate is fixedly connected to the inner wall of the telescopic head.

[0014] Preferably, the pneumatic plate is circular, and a connecting column is integrally formed on the outer edge of the pneumatic plate, and the connecting column is fixedly connected to the inner wall of the telescopic head.

[0015] Preferably, the pneumatic plate is reticulated, and the pneumatic plate is fixedly connected to the inner wall of the telescopic head.

[0016] Preferably, the sealing structure between the fairing and the nacelle hood further includes a second sealing brush, the second sealing brush is fixedly connected to the sealing groove, and the bristles of the second sealing brush abut against the telescopic head.

[0017] Preferably, the telescopic amount of the telescopic head is less than the length of the sealing groove.

[0018] The technical solution of the present utility model enables the airflow in the fairing to drive the telescopic head to extend through the pneumatic plate. The intensity of the airflow in the fairing not only affects the extension of the telescopic head, but also affects the operating speed of the wind turbine, that is, the relative movement between the fairing and the nacelle hood; when the intensity of the airflow in the fairing is zero, there is no relative movement between the fairing and the nacelle hood, the telescopic head cannot extend, the telescopic head abuts against the side wall of the sealing groove, and the sealing effect of the abutting seal is the best, and there is no wear problem due to no relative movement; when the intensity of the airflow in the fairing is large, relative movement occurs, and the abutting effect between the two decreases to solve the wear problem. At the same time, the strong airflow inside can reversely pass through the gap between the fairing and the nacelle hood to inhibit the entry of external gas, realizing the sealing against external force gas. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a cross-sectional view of the sealing structure between a fairing and a nacelle cover of the present invention;

[0021] Figure 2 For Figure 1 It is a cross-sectional view when the telescopic head in the sealing structure between the fairing and the nacelle cover retracts;

[0022] Figure 3 For Figure 1 It is an assembly drawing of the counterweight in the sealing structure between the fairing and the nacelle cover;

[0023] Figure 4 For Figure 1 It is a left view of the second pneumatic plate in the sealing structure between the fairing and the nacelle cover;

[0024] Figure 5 For Figure 1 It is a left view of the third pneumatic plate in the sealing structure between the fairing and the nacelle cover.

[0025] Explanation of reference numerals:

[0026] 1. Telescopic head; 11. Pneumatic plate; 12. Spring; 13. First sealing brush; 14. Counterweight; 2. Sealing groove; 21. Second sealing brush. Specific embodiments

[0027] The following will clearly and completely describe the technical solutions of the present invention in combination with the embodiments. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0029] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] Combined with Figures 1 to 5 As shown, a sealing structure between a fairing and an engine nacelle provided by the present utility model includes a telescopic head 1 and a sealing groove 2.

[0031] Combined with Figures 1 to 5 As shown, the telescopic head 1 is assembled inside the outlet of the fairing, and a pneumatic plate 11 is fixedly assembled inside the telescopic head 1; the sealing groove 2 is fixedly assembled at the entrance of the engine nacelle, the outlet end of the telescopic head 1 is slidably assembled inside the sealing groove 2, and there is a gap between the bottom wall of the telescopic head 1 and the sealing groove 2; when the telescopic head 1 is in a retracted state, the telescopic head 1 abuts against the side wall of the sealing groove 2; the airflow drives the telescopic head 1 to extend through the pneumatic plate 11, and after the telescopic head 1 extends, it does not contact the sealing groove 2, and at the same time, the internal airflow reversely passes through the gap between the fairing and the engine nacelle to inhibit the entry of external gas.

[0032] In this embodiment, the airflow in the fairing drives the telescopic head 1 to extend through the pneumatic plate 11. The intensity of the airflow in the fairing affects both the extension of the telescopic head 1 and the operating speed of the wind turbine, that is, the relative movement between the fairing and the nacelle cover. When the intensity of the airflow in the fairing is zero, there is no relative movement between the fairing and the nacelle cover, and the telescopic head 1 cannot extend. The telescopic head 1 abuts against the side wall of the sealing groove 2, and the sealing effect of the abutting seal is the best. Moreover, since there is no relative movement, there will be no wear problem. When the intensity of the airflow in the fairing is relatively large, relative movement occurs, and the abutting effect between the two decreases to solve the wear problem. At the same time, the strong airflow inside can reversely pass through the gap between the fairing and the nacelle cover to inhibit the entry of external gas, achieving sealing against external force gas.

[0033] In some embodiments, as shown in Figure 2 the sealing structure between the fairing and the nacelle cover further includes a spring 12. The two ends of the spring 12 respectively abut against the telescopic head 1 and the fairing. The elastic force of the spring 12 pushes the telescopic head 1 to move towards the retracted state. Wind power generation converts the natural wind in nature into electrical energy, and the natural wind has the characteristics of being unpredictable. Through the spring 12, the sealing device naturally maintains the abutting seal state. When a strong airflow passes through, the pneumatic plate 11 drives the telescopic head 1 to overcome the elastic force of the spring 12 and move, so that the sealing device switches to the airflow sealing state. Increasing the spring 12 can realize the automatic switching between the two states.

[0034] In some embodiments, as shown in Figure 3 the fairing is located directly below the nacelle cover, and the spring 12 is replaced by a counterweight 14. The counterweight 14 is fixedly connected to the telescopic head 1. Using the counterweight 14 instead of the spring 12 is another solution to achieve automatic switching, which can avoid the influence of spring fatigue.

[0035] In some embodiments, as shown in Figure 2 the sealing structure between the fairing and the nacelle cover further includes a first sealing brush 13. The first sealing brush 13 is assembled on the outer wall of the telescopic head 1, and the brush head of the first sealing brush 13 abuts against the bottom wall of the sealing groove 2. When the airflow intensity just meets the requirement to drive the telescopic head 1 to move, the gap between the fairing and the nacelle cover has been opened, but the airflow intensity cannot fully ensure the sealing effect. The first sealing brush 13 can ensure the stability of the sealing effect at this time, realizing an additional sealing state with a sealing brush.

[0036] In some embodiments, as shown in Figure 1As shown, a draft angle is provided on the bottom wall of the sealing groove 2. The dimension of the bottom wall of the sealing groove 2 is larger on the side away from the fairing. When the telescopic head 1 is in the extended state, there is a gap between the brush head of the first sealing brush 13 and the bottom wall of the sealing groove 2. When the air flow is strong, the strong air flow will damage the brush head of the first sealing brush 13. At the same time, contact between the brush head of the first sealing brush 13 and the bottom wall of the sealing groove 2 will cause wear problems. Through the design of the draft angle, the strong air flow can relieve the contact relationship between the brush head of the first sealing brush 13 and the bottom wall of the sealing groove 2.

[0037] In some embodiments, in combination with Figure 1 As shown, the pneumatic plate 11 is circular ring-shaped. The pneumatic plate 11 is fixedly connected to the inner wall of the telescopic head 1. The function of the pneumatic plate 11 is to intercept the kinetic energy in the air flow and transfer the kinetic energy to the telescopic head 1. The circular ring-shaped pneumatic plate 11 is the simplest to manufacture and has relatively high structural strength.

[0038] In some embodiments, in combination with Figure 4 As shown, the pneumatic plate 11 is circular. A connecting column is integrally formed on the outer edge of the pneumatic plate 11. The connecting column is fixedly connected to the inner wall of the telescopic head 1. Compared with the circular ring-shaped pneumatic plate 11, the second pneumatic plate 11 can prevent the air flow from concentrating towards the center, ensuring that the air flow can stably pass through the gap between the fairing and the nacelle cover.

[0039] In some embodiments, in combination with Figure 5 As shown, the pneumatic plate 11 is mesh-shaped. The pneumatic plate 11 is fixedly connected to the inner wall of the telescopic head 1. The mesh-shaped pneumatic plate 11 can ensure the uniformity of the air flow after passing through.

[0040] In some embodiments, in combination with Figure 3 As shown, the sealing structure between the fairing and the nacelle cover further includes a second sealing brush 21. The second sealing brush 21 is fixedly connected to the sealing groove 2. The brush head of the second sealing brush 21 abuts against the telescopic head 1. The main function of the second sealing brush 21 is dust prevention. The gap dimension at the position of the second sealing brush 21 does not change with the telescopic movement of the telescopic head 1, which is beneficial to the stable operation of the second sealing brush 21. At the same time, the sealing requirement of the second sealing brush 21 is relatively low, the abutting force is small, and the wear rate is low.

[0041] In some embodiments, in combination with Figure 1 As shown, the telescopic amount of the telescopic head 1 is less than the length of the sealing groove 2, which can prevent the telescopic head 1 from abutting against the other side wall of the sealing groove 2 after excessive extension, thus avoiding wear problems.

[0042] Working process: When there is no airflow passing through the fairing, the wind turbine is not working, so there is no relative movement between the fairing and the nacelle cover. The telescopic head 1 is in a retracted state, and the telescopic head 1 abuts against the side wall of the sealing groove 2 for sealing.

[0043] When the airflow flows towards the nacelle cover inside the fairing, the wind turbine starts to work, and relative movement begins to occur between the fairing and the nacelle cover. When the airflow passes through the pneumatic plate 11, the telescopic head 1 is driven to extend through the pneumatic plate 11. The telescopic head 1 moves away from the side wall of the sealing groove 2 and no longer contacts the sealing groove 2. At the same time, a gap is generated between the fairing and the nacelle cover for the gas to pass through. The airflow intensity inside the fairing is relatively high and reversely passes through the gap to inhibit the entry of external gas.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing structure between a fairing and a nacelle cover, characterized in that Comprising: A telescopic head (1), the telescopic head (1) is assembled inside the outlet of the fairing, and a pneumatic plate (11) is fixedly assembled inside the telescopic head (1); A sealing groove (2), the sealing groove (2) is fixedly assembled at the entrance of the nacelle cover, the outlet end of the telescopic head (1) is slidably assembled inside the sealing groove (2), and a gap is left between the telescopic head (1) and the bottom wall of the sealing groove (2); When the telescopic head (1) is in the retracted state, the telescopic head (1) abuts against the side wall of the sealing groove (2); the airflow passes through the pneumatic plate (11) to drive the telescopic head (1) to extend. After the telescopic head (1) extends, it does not contact the sealing groove (2), and at the same time, the internal airflow reversely passes through the gap between the fairing and the nacelle cover to inhibit the entry of external gas.

2. The sealing structure between the fairing and the nacelle cover according to claim 1, characterized in that It further includes a spring (12), both ends of the spring (12) respectively abut against the telescopic head (1) and the fairing, and the elastic force of the spring (12) pushes the telescopic head (1) to move towards the retracted state.

3. The sealing structure between the fairing and the nacelle cover according to claim 2, characterized in that, The fairing is located directly below the nacelle cover, the spring (12) is replaced by a counterweight (14), and the counterweight (14) is fixedly connected to the telescopic head (1).

4. The sealing structure between the fairing and the nacelle cover according to claim 1, characterized in that, It further includes a first sealing brush (13), the first sealing brush (13) is assembled on the outer wall of the telescopic head (1), and the brush head of the first sealing brush (13) abuts against the bottom wall of the sealing groove (2).

5. The sealing structure between the fairing and the nacelle according to claim 4, characterized in that, The bottom wall of the sealing groove (2) is provided with a draft angle, the dimension of the bottom wall of the sealing groove (2) on the side away from the fairing is larger, and when the telescopic head (1) is in the extended state, a gap is left between the brush head of the first sealing brush (13) and the bottom wall of the sealing groove (2).

6. The sealing structure between the fairing and the nacelle according to claim 1, characterized in that The pneumatic plate (11) is annular, and the pneumatic plate (11) is fixedly connected to the inner wall of the telescopic head (1).

7. The sealing structure between the fairing and the nacelle cover according to claim 1, characterized in that The pneumatic plate (11) is circular, a connecting column is integrally formed at the outer edge of the pneumatic plate (11), and the connecting column is fixedly connected to the inner wall of the telescopic head (1).

8. The sealing structure between the fairing and the nacelle according to claim 1, characterized in that, The pneumatic plate (11) is mesh-shaped, and the pneumatic plate (11) is fixedly connected to the inner wall of the telescopic head (1).

9. The sealing structure between the fairing and the nacelle according to claim 1, characterized in that, It further includes a second sealing brush (21), the second sealing brush (21) is fixedly connected to the sealing groove (2), and the brush head of the second sealing brush (21) abuts against the telescopic head (1).

10. The sealing structure between the fairing and the nacelle according to claim 1, wherein The telescopic amount of the telescopic head (1) is less than the length of the sealing groove (2).

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