Cabin cover and wind generating set

Abstract

The utility model provides a cabin cover and a wind generating set. The cabin cover is used for the wind generating set and comprises a cover body and at least two filtering modules, the cover body comprises a plurality of walls, a containing cavity for containing components of the wind generating set is defined by the walls, and at least one of the walls is provided with at least two ventilation openings communicating with the containing cavity and the outside of the cover body; the at least two filtering modules are correspondingly arranged at the ventilation openings, the filtering modules are fixed to the corresponding walls, and the ventilation areas of the at least two ventilation openings are the same. The cabin cover can filter introduced airflow, and the service life of the wind generating set can be prolonged.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of wind power generation, and in particular, to a nacelle cover and a wind turbine generator. BACKGROUND

[0002] A wind turbine generator is an electric power device for converting wind energy into electric energy. The wind turbine generator includes a rotor, a generator, a tower, a speed-limiting safety mechanism, and an energy storage device. When the generator system is working, some components of the wind turbine generator are arranged in the nacelle cover and generate a large amount of heat energy. A ventilation opening is arranged on the nacelle cover to ventilate, so as to facilitate heat dissipation of the wind turbine generator. The airflow entering through the ventilation opening is often mixed with various particulate matters, such as sand particles, dust, pollen, willow catkins, and the like. These particulate matters can cause abnormality of the generator system, and reduce the service life of the wind turbine generator. SUMMARY

[0003] The present application provides a nacelle cover, which can solve the technical problem of reducing the service life of the wind turbine generator caused by the particulate matters mixed in the airflow entering through the ventilation opening in the related art.

[0004] In an aspect, the present application provides a nacelle cover, which is used for a wind turbine generator. The nacelle cover comprises:

[0005] a cover body comprising a plurality of walls, the plurality of walls being closed to form a containing cavity for containing components of the wind turbine generator, at least one of the plurality of walls having at least two ventilation openings communicating between the containing cavity and an outside of the cover body;

[0006] at least two filter modules, the at least two filter modules being correspondingly arranged at the ventilation openings, and the filter modules being fixed to the corresponding walls, wherein the ventilation areas of the at least two ventilation openings are the same.

[0007] In some embodiments, the plurality of walls comprises a bottom wall having a mounting opening communicating between the containing cavity and the outside of the cover body, and the at least two ventilation openings comprise at least one first ventilation opening arranged on the bottom wall, and the mounting opening is used for connecting a tower of the wind turbine generator.

[0008] In some embodiments, the number of the first ventilation openings is a plurality, and the plurality of first ventilation openings are arranged in an array.

[0009] In some embodiments, the plurality of walls further comprises a first side wall, a second side wall, a third side wall, and a fourth side wall, the first side wall being used for mounting a rotor of the wind turbine generator, the second side wall being arranged opposite to the first side wall, the third side wall and the fourth side wall being arranged opposite to each other and being connected to the first side wall and the second side wall, respectively.

[0010] The at least two air vents include a second air vent, at least one of the second side wall, the third side wall and the fourth side wall has at least one second air vent, the filter module is arranged at the second air vent in correspondence, and the nacelle cover further comprises a waterproof structure, the waterproof structure is arranged on a side of the filter module away from the accommodating cavity and located at the second air vent.

[0011] In some embodiments, the filter module comprises a first cover body, at least one second cover body and at least one filter element, the first cover body is fixed to the wall, the at least one second cover body is arranged on the first cover body, and the at least one filter element is arranged between the first cover body and the second cover body.

[0012] In some embodiments, the first cover body comprises a first frame body and a mounting flange, the second cover body is arranged on the first frame body, and the mounting flange extends away from the second cover body and is arranged on the wall and fixed to the wall.

[0013] In some embodiments, the first cover body comprises a first frame body and a first support grid arranged on the first frame body, the second cover body comprises a second frame body and a second support grid arranged on the second frame body, the first frame body and the second frame body are arranged on each other, and the filter element is arranged between the first support grid and the second support grid.

[0014] In some embodiments, the first cover body comprises a first reinforcing rib extending in a first direction, the second cover body comprises a second reinforcing rib extending in a second direction, opposite ends of the first reinforcing rib are connected to support ribs arranged opposite to each other on the first frame body, opposite ends of the second reinforcing rib are connected to support ribs arranged opposite to each other on the second frame body, and a projection of the first reinforcing rib on the filter element intersects a projection of the second reinforcing rib on the filter element.

[0015] In some embodiments, the filter module comprises at least one pressing assembly, the pressing assembly comprises a pressing piece, a fixing column and an adjusting piece, the fixing column is connected to the first frame body, the pressing piece has a first through hole, the fixing column is inserted into the first through hole, the adjusting piece is threadedly connected to the fixing column, the adjusting piece is used for adjusting a distance between the pressing piece and the first frame body, and a side of the pressing piece close to the first frame body abuts against the second frame body.

[0016] The embodiment of the present application provides a wind turbine generator, which comprises the nacelle cover provided in the first aspect.

[0017] The cabin cover and the wind turbine provided by the application have the following advantages: the filter module is arranged at the first air vent, so that the particles in the airflow entering the containing cavity through the first air vent are filtered, which helps to improve the service life of the wind turbine using the cabin cover; at least one of the plurality of walls has at least two air vents, so that the air vent area of a single air vent is reduced, and the air vent position is arranged flexibly; the air vent areas of the air vents are the same, so that any filter module can be installed on different air vents, which facilitates the replacement of the filter module and the storage of replaceable filter modules. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective structural schematic view of the cabin cover provided by some embodiments of the application;

[0019] Figure 2 is a plane structural schematic view of the cabin cover provided by some embodiments of the application;

[0020] Figure 3 is a plane structural schematic view of the cabin cover provided by some embodiments of the application;

[0021] Figure 4 is a plane structural schematic view of the cabin cover provided by some embodiments of the application;

[0022] Figure 5 is a plane structural schematic view of the cabin cover provided by some embodiments of the application;

[0023] Figure 6 is a perspective structural schematic view of the filter module provided by some embodiments of the application;

[0024] Figure 7 is an exploded structural schematic view of the filter module provided by some embodiments of the application;

[0025] Figure 8 is a cross-sectional structural schematic view of the filter module provided by some embodiments of the application;

[0026] Figure 9 is a partial cross-sectional structural schematic view of the filter module provided by some embodiments of the application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1 cover body; 11, wall; 11a, bottom wall; 11b, first side wall; 11c, second side wall; 11d, third side wall; 12, air vent; 121, first air vent; 122, second air vent; 13, mounting opening;

[0029] 2, filter module; 21, first cover body; 211, first frame body; 212, mounting flange; 213, first support grid; 214, first reinforcing rib; 215, pressing assembly; 2151, pressing piece; 2152, fixing column; 2153, adjusting piece; 216, limiting piece; 217, mounting hole; 22, second cover body; 221, second frame body; 222, second support grid; 223, second reinforcing rib; 225, handle; 23, filter element;

[0030] 3, waterproof structure;

[0031] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0032] In order to enable a more complete understanding of the above-mentioned objects, features and advantages of the present disclosure, the schemes of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0033] In the following description, many specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the description are only one part of the embodiments of the present disclosure, not all the embodiments.

[0034] Please refer to Figure 1 and Figure 2 , the present application embodiment provides a nacelle cover, the nacelle cover is used for a wind turbine generator, the nacelle cover includes cover body 1 and at least two filter modules 2, the cover body 1 includes multiple walls 11, the multiple walls 11 are enclosed to form a containing cavity 15 containing components of the wind turbine generator, at least one of the multiple walls 11 has at least two ventilation openings 12 communicating the containing cavity 15 and the outside of the cover body 1, at least two filter modules 2 are correspondingly arranged at the ventilation openings 12, the filter module 2 is fixed with the corresponding wall 11, wherein the ventilation areas of the at least two ventilation openings 12 are the same.

[0035] The nacelle cover is used to form a containing cavity 15 to accommodate components of the wind turbine generator in the containing cavity 15, reducing the exposure of the components of the wind turbine generator to the external environment. The components of the wind turbine generator contained in the containing cavity 15 include but are not limited to a generator, a control module, a cooling module, a transmission module, etc. The wind turbine generator also includes a impeller, which is connected to the generator through the transmission module. The impeller converts wind energy into mechanical energy, and the transmission module transmits the mechanical energy into the generator, which converts the mechanical energy into electrical energy, realizing wind power generation of the wind turbine generator.

[0036] The filter module 2 has apertures for airflow to pass through, so that external airflow can pass through the filter module 2 into the accommodation cavity 15, so that the filter module 2 can filter particulate matter in at least part of the airflow, thereby prolonging the service life of the wind turbine generator. The filter module 2 includes, but is not limited to, a grid with apertures, filter cotton, etc. The filter module 2 is arranged on the vent 12, and is fixed to the wall 11 in which the corresponding vent 12 is formed.

[0037] The vent areas of the vents 12 are the same, so that any filter module 2 can be fitted to different vents 12 for installation, thereby facilitating replacement of the filter module 2 and storage of replaceable filter modules 2.

[0038] Optionally, the vent area of the vent 12 is S1, and the vent area of the vent 12 can be the opening area of the vent 12. The vent area of the filter module 2 is S2, and S1≥S2.

[0039] In the nacelle cover provided in the present application, the filter module 2 is arranged on the vent 12, thereby filtering particulate matter in the airflow entering the accommodation cavity 15 through the vent 12, which is conducive to prolonging the service life of the wind turbine generator using the nacelle cover. At least one of the plurality of walls 11 has at least two vents 12, so as to reduce the vent area of a single vent 12, which is conducive to flexible arrangement of the position of the vent 12. By arranging the vent areas of the vents 12 to be the same, any filter module 2 can be fitted to different vents 12 for installation, thereby facilitating replacement of the filter module 2 and storage of replaceable filter modules 2.

[0040] In some embodiments, the plurality of walls 11 includes a bottom wall 11a having a mounting opening 13 communicating between the accommodation cavity 15 and the outside of the cover body 1, and the at least two vents 12 include at least one first vent 121 arranged on the bottom wall 11a. The mounting opening 13 is used to connect a tower of the wind turbine generator.

[0041] The wind turbine generator includes a tower supporting the nacelle cover, so that the impeller can be away from the ground, which is conducive to improving the airflow speed received by the impeller. In the wind turbine generator, the bottom wall 11a is located at the bottom of the nacelle cover, and at least part of the wind turbine generator is fixed to the bottom wall 11a. The tower can be connected to the bottom wall 11a through a flange or other rotatable mechanism. Optionally, an upper flange is arranged at the top of the tower, and a lower flange matched with the upper flange is arranged at the mounting opening 13. The upper flange and the lower flange are used to realize cooperation between the tower and the nacelle cover, and to keep the connection between the tower and the nacelle cover sealed.

[0042] The first vent 121 is located on the bottom wall 11a, allowing external airflow to enter the receiving cavity 15 through the first vent 121. In the wind turbine generator set, external airflow can pass through the first vent 121 vertically. Since both the first vent 121 and the mounting opening 13 are located on the bottom wall 11a, in the assembled wind turbine generator set, the opening direction of the first vent 121 and the opening direction of the mounting opening 13 both face the ground. This allows rainwater from the external environment to be blocked by the other side walls of the cover 1, except for the bottom wall 11a, thereby reducing or preventing rainwater from entering the receiving cavity 15 through the first vent 121 and eliminating the need for a rainproof structure for the filter module 2 on the bottom wall 11a.

[0043] In some embodiments, the number of first vents 121 is multiple, and the multiple first vents 121 are arranged in an array.

[0044] The first ventilation opening 121 can be distributed on the bottom wall 11a as needed to avoid the structure of the wind turbine generator set installed on the bottom wall 11a, so as to prevent the structure of the wind turbine generator set installed on the bottom wall 11a from blocking the airflow flowing in from the first ventilation opening 121.

[0045] When there is an area larger than S1 on the bottom wall 11a, multiple first ventilation openings 121 arranged in an array can be set in the empty area, and the filter modules 2 can be installed one by one at the first ventilation openings 121, thereby reducing the area of ​​a single first ventilation opening 121 and a single filter module 2, making it easier to store and transport the filter modules 2.

[0046] For example, such as Figure 2 As shown, the 12 filter modules are arranged in 6 columns and 2 rows.

[0047] For example, such as Figure 3 As shown, there are 12 filter modules 2 arranged in 6 columns and 2 rows, and there are also 4 filter modules 2 arranged in 4 columns and 1 row.

[0048] For example, such as Figure 4 As shown, there are 7 filter modules 2 arranged in 4 columns and 2 rows, 2 filter modules 2 arranged in 2 columns and 1 row, and 5 filter modules 2 arranged in 3 columns and 2 rows.

[0049] Please see Figure 5 For ease of display, Figure 5 The fourth sidewall and the second sidewall 11c are omitted. In some embodiments, the plurality of walls 11 also include a first sidewall 11b, a second sidewall 11c, a third sidewall 11d and a fourth sidewall. The first sidewall 11b is used to install the impeller of the wind turbine generator set. The second sidewall 11c is disposed opposite to the first sidewall 11b. The third sidewall 11d and the fourth sidewall are disposed opposite to each other and are respectively connected to the first sidewall 11b and the second sidewall 11c.

[0050] The at least two air vents 12 include a second air vent 122, at least one of the second side wall 11c, the third side wall 11d and the fourth side wall has at least one second air vent 122, at least one of the plurality of filter modules 2 is arranged at the second air vent 122, and the nacelle cover further comprises a waterproof structure 3, the waterproof structure 3 is arranged on a side of the filter module 2 located at the second air vent 122 and facing away from the accommodation cavity 15.

[0051] Compared with the first air vent 121 arranged on the bottom wall 11a, the second air vent 122 is arranged on at least one of the second side wall 11c, the third side wall 11d and the fourth side wall. In the assembled wind turbine generator, the impeller is arranged on the first side wall 11b, and if the first side wall 11b is regarded as the front wall, the second side wall 11c can be regarded as the rear wall, and the third side wall 11d and the fourth side wall can be regarded as the side walls distributed on both sides.

[0052] At least one second air vent 122 is arranged on at least one of the second side wall 11c, the third side wall 11d and the fourth side wall, so as to increase the maximum air flow into the nacelle cover. Compared with the bottom wall 11a, the second side wall 11c, the third side wall 11d and the fourth side wall can be splashed by rainwater, and the waterproof structure arranged thereon can reduce or avoid rainwater from entering the accommodation cavity 15.

[0053] The waterproof structure 3 is arranged on a side of the filter module 2 located at the second air vent 122 and facing away from the accommodation cavity 15, so that when the filter module 2 arranged at the second air vent 122 is replaced, the filter module 2 can be directly replaced in the accommodation cavity 15, thereby reducing the construction safety of the worker.

[0054] Optionally, the waterproof structure 3 comprises a plurality of wings arranged in sequence, and a bending channel is formed between the wings arranged in sequence, so that the air flow can pass through the bending channel, and the rainwater is blocked by the wings. Optionally, the waterproof structure 3 is a louver structure, the air flow can pass through the gap between adjacent louvers, and the rainwater is blocked by the louvers.

[0055] Please refer to Figure 6 and Figure 7 In some embodiments, the filter module 2 comprises a first cover body 21, at least one second cover body 22 and at least one filter piece 23, the first cover body 21 is fixed with the wall 11, the at least one second cover body 22 is arranged on the first cover body 21, and the at least one filter piece 23 is arranged between the first cover body 21 and the second cover body 22.

[0056] Optionally, the filter module 2 comprises a second cover 22, and the filter module 2 has a structure that the first cover 21 and the second cover 22 are overlapped, and a filter 23 is arranged between the first cover 21 and the second cover 22. Optionally, the filter module 2 comprises two second covers 22, and the filter module 2 has a structure that the first cover 21 and the two second covers 22 are overlapped respectively, and two filters 23 are arranged between the two second covers 22 and the first cover 21 respectively. Optionally, the filter module 2 can also comprise three, four, five or the like number of second covers 22, and the plurality of second covers 22 are overlapped with the same first cover 21 respectively, and the number of filters 23 is the same as the number of second covers 22. When the filter module 2 comprises a plurality of second covers 22 and filters 23, corresponding to the same ventilation area of the ventilation opening, the plurality of second covers 22 and the filters 23 have a smaller area, which facilitates the movement of the second cover 22 and the replacement of the filter 23.

[0057] In some embodiments, the first cover 21 comprises a first frame 211 and a mounting flange 212 connected with each other, the second cover 22 is overlapped with the first frame 211, the mounting flange 212 extends from the first frame 211 in a direction away from the second cover 22, and the mounting flange 212 is overlapped with the wall 11 and fixed with the wall 11.

[0058] The first frame 211 can be a hollow frame structure, and the mounting flange 212 extends from the first frame 211. The mounting flange 212 is overlapped with the wall 11 and fixed with the wall 11, so as to stably connect the first frame 211 and the wall 11. The mounting flange 212 can be fixed with the bottom wall by bolt connection, welding or the like.

[0059] In some embodiments, the cover 1 comprises a first fixing member arranged on the wall 11, the mounting flange 212 has a mounting hole 217 matched with the first fixing member, the filter module 2 comprises a second fixing member, the first fixing member passes through the mounting hole 217, and the second fixing member is arranged on a side of the mounting flange 212 away from the wall 11 and locked with the first fixing member.

[0060] Optionally, the first fixing member can be a welded nut fixed on the wall 11, and the second fixing member can be a bolt. The mounting flange 212 is aligned with the welded nut by the mounting hole 217, and the bolt is screwed on the welded nut, so as to fix the mounting flange 212 with the bottom wall 11a.

[0061] In some embodiments, the first cover 21 comprises a first frame 211 and a first support grid 213 arranged on the first frame 211, the second cover 22 comprises a second frame 221 and a second support grid 222 arranged on the second frame 221, the first frame 211 and the second frame 221 are overlapped, and the filter 23 is arranged between the first support grid 213 and the second support grid 222.

[0062] The first support grid 213 can be arranged in the hollow of the first frame 211, and the second support grid 222 can be arranged in the hollow of the second frame 221, so that the first support grid 213 and the second support grid 222 can bear the walking of the staff on the filter module 2.

[0063] In some embodiments, the first cover 21 includes a first reinforcing rib 214 extending along the first direction X, and the second cover 22 includes a second reinforcing rib 223 extending along the second direction Y. Opposite ends of the first reinforcing rib 214 are connected to the support ribs oppositely arranged on the first frame 211, and opposite ends of the second reinforcing rib 223 are connected to the support ribs oppositely arranged on the second frame 221. The orthogonal projection of the first reinforcing rib 214 on the filter element 23 intersects with the orthogonal projection of the second reinforcing rib 223 on the filter element 23.

[0064] The first frame 211 is formed by connecting the support ribs of the first frame 211 end to end, and the second frame 221 is formed by connecting the support ribs of the second frame 221 end to end. Opposite ends of the first reinforcing rib 214 are connected to the support ribs oppositely arranged on the first frame 211, and opposite ends of the second reinforcing rib 223 are connected to the support ribs oppositely arranged on the second frame 221. The orthogonal projection of the first reinforcing rib 214 on the filter element 23 intersects with the orthogonal projection of the second reinforcing rib 223 on the filter element 23, so that the first reinforcing rib 214 and the second reinforcing rib 223 can be arranged alternately, thereby improving the bearing capacity of the filter module 2. Optionally, the cross-sectional area of the first reinforcing rib 214 and the second reinforcing rib 223 is greater than the cross-sectional area of a single rib in the first support grid 213 and the second support grid 222.

[0065] Please refer to Figure 8 and Figure 9 In some embodiments, the filter module 2 includes at least one pressing assembly 215. The pressing assembly 215 includes a pressing piece 2151, a fixing column 2152, and an adjusting piece 2153. The fixing column 2152 is connected to the first frame 211. The pressing piece 2151 has a first through hole, and the fixing column 2152 is inserted into the first through hole. The adjusting piece 2153 is threadedly connected to the fixing column 2152. The adjusting piece 2153 is used to adjust the distance between the pressing piece 2151 and the first frame 211. The side of the pressing piece 2151 close to the first frame 211 abuts against the second frame 221.

[0066] The number of the pressing assemblies 215 can be multiple, and the multiple pressing assemblies 215 are arranged at intervals along the circumferential side of the first frame 211. The filter element 23 and the second cover 22 can be placed between the multiple pressing members 2151 and the first frame 211, and then the adjusting member 2153 is screwed to adjust the pressing members 2151 to approach the first frame 211, so that the side of the pressing members 2151 close to the first frame 211 abuts against the second frame 221, thereby fixing the first cover 21 and the second cover 22.

[0067] In some embodiments, the first cover 21 further comprises a limiting member 216 arranged on the first frame 211, and the multiple limiting members 216 can be arranged at intervals along the circumferential side of the first frame 211, and the filter element 23, the second cover 22 and the first cover 21 are aligned by the limiting members 216.

[0068] In some embodiments, the second cover 22 further comprises a handle 225 arranged on the second frame 221, so as to facilitate the construction personnel to hold the handle 225 and move the second cover 22.

[0069] The second aspect further provides a wind turbine generator set, comprising the nacelle cover provided in the first aspect.

[0070] The wind turbine generator set has any one of the nacelle covers in the above embodiments and can achieve the same technical effects, and thus details are not repeated here.

[0071] It should be noted that, in the present document, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", "includes", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. A nacelle, characterized in that, The nacelle cover is used for a wind turbine generator set, and the nacelle cover comprises: a cover body comprising a plurality of walls, the plurality of walls enclosing a containing cavity containing components of the wind turbine generator set, at least one of the plurality of walls having at least two ventilation openings communicating between the containing cavity and the outside of the cover body; at least two filter modules corresponding to the ventilation openings, the filter modules being fixed to the corresponding walls, wherein the ventilation areas of the at least two ventilation openings are the same.

2. The nacelle cover according to claim 1, characterized in that The plurality of walls comprises a bottom wall having a mounting opening communicating between the containing cavity and the outside of the cover body, and the at least two ventilation openings comprise at least one first ventilation opening provided on the bottom wall, and the mounting opening is used for connecting a tower of the wind turbine generator set.

3. The nacelle cover according to claim 2, characterized in that, The number of the first ventilation openings is a plurality, and the plurality of first ventilation openings are arranged in an array.

4. The nacelle cover according to claim 1, characterized in that, The plurality of walls further comprises a first side wall, a second side wall, a third side wall and a fourth side wall, the first side wall being used for mounting an impeller of the wind turbine generator set, the second side wall being provided opposite to the first side wall, and the third side wall and the fourth side wall are provided opposite to each other and connected to the first side wall and the second side wall respectively. The at least two ventilation openings comprise second ventilation openings, at least one of the second side wall, the third side wall and the fourth side wall has at least one second ventilation opening, the filter modules are correspondingly provided on the second ventilation openings, and the nacelle cover further comprises a waterproof structure, the waterproof structure being provided on a side of the filter modules located at the second ventilation openings and away from the containing cavity.

5. The nacelle cover according to any one of claims 1 to 4, characterized in that, The filter modules comprise a first cover body, at least one second cover body and at least one filter element, the first cover body being fixed to the walls, the at least one second cover body being provided on the first cover body, and the at least one filter element being provided between the first cover body and the second cover body.

6. The nacelle cover according to claim 5, characterized in that The first cover body comprises a first frame and a mounting flange, the second cover body is provided on the first frame, the mounting flange extends from the first frame and away from the second cover body, and the mounting flange is folded on the walls and fixed to the walls.

7. The nacelle cover according to claim 5, characterized in that, The first cover body comprises a first frame and a first support grid provided on the first frame, the second cover body comprises a second frame and a second support grid provided on the second frame, the first frame and the second frame are provided on each other, and the filter element is provided between the first support grid and the second support grid.

8. The nacelle cover according to claim 7, characterized in that The first cover body comprises a first reinforcing rib extending in a first direction, the second cover body comprises a second reinforcing rib extending in a second direction, opposite ends of the first reinforcing rib are connected to support ribs provided opposite to the first frame, opposite ends of the second reinforcing rib are connected to support ribs provided opposite to the second frame, and a projection of the first reinforcing rib on the filter element intersects a projection of the second reinforcing rib on the filter element.

9. The nacelle cover according to claim 7, characterized in that The filter module comprises at least one pressing assembly, the pressing assembly comprises a pressing part, a fixing column and an adjusting part, the fixing column is connected with the first frame body, the pressing part has a first through hole, the fixing column is inserted into the first through hole, the adjusting part is threadedly connected with the fixing column, the adjusting part is used for adjusting the distance between the pressing part and the first frame body, and one side of the pressing part close to the first frame body abuts against the second frame body.

10. A wind power unit, characterized in that A nacelle comprising a nacelle cover according to any one of claims 1 to 9.

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