Patent Description:
The nacelle cover, as a protective shell of the wind turbine generator, can enclose multiple components of the wind turbine generator in it and protect them, and the reliability of the nacelle cover determines the stability requirements and service life of the wind turbine generator.

Due to unreasonable structural designs, the nacelle covers in the prior art have a lower strength after being formed by assembling various sheets, and meanwhile, the operator needs to climb to the outside of the nacelle cover and disassemble and assemble fasteners for connecting the various sheets when maintaining the nacelle cover, thereby bringing hidden dangers to the personal safety of the operators.

<CIT> discloses a method of manufacturing composite laminate panel sub-elements for subsequent assembling into a modular assembly structure, the method includes preprocessing steps of a) casting an elongate composite laminate sheet panel having opposite first and second fiber-reinforced plastic face skins sandwiching a core, a free first elongate edge and an opposite second elongate free edge, b) demolding the elongate composite laminate sheet panel, and c) cutting the demolded elongate composite laminate sheet panel into shorter sections, thereby providing sections with at least one free cut edge, wherein a free first edge has the same profile as the free first elongate edge, and a free second edge is parallel to the free first edge and has the same profile as the free second elongate edge.

<CIT> relates to a split-type engine room cover which includes a FRP sandwich unit component and a T-type steel component which are mechanically connected, and the structure system of the engine room cover has the advantages of convenient connection, accurate positioning, high strength, large stiffness, stable structure, anti-aging surface, good decorating effect and the like; and each unit component has small size and light weight and is convenient for production, transportation and assembly.

Embodiments of the present disclosure provide a nacelle cover and a wind power generator, the nacelle cover can satisfy requirements on protection of multiple components of the wind power generator, and meanwhile, the nacelle cover has high strength and can ensure the personal safety of operators during maintenance.

On one aspect, the embodiments of the present application provide a nacelle cover, including: a cover casing, including a first plate, a second plate and at least one support beam, the first plate and the second plate being alternately arranged in a circumferential direction perpendicular to an extending direction of the support beam, the first plate and the second plate adjacent each other forming a group, the first plate and the second plate in the group being spaced apart from each other in the circumferential direction and holding the support beam between them, and the first plate, the second plate and the support beams being connected and jointly forming an accommodating chamber; and fasteners, wherein there are two or more fasteners disposed inside the accommodating chamber, at least one fastener detachably connects the first plate to the support beam, and at least one fastener detachably connect the second plate to the support beam, wherein each support beam is at least partially located outside the accommodating chamber, and the support beam comprises a cavity penetrating through the support beam along its own extending direction, two or more positioning portions are disposed in the cavity, and the fasteners are detachably connected to the support beam through the positioning portions.

According to the implementation of one aspect of the present application, the support beam is formed as a prismatic member and includes a first surface and a second surface which are arranged to intersect each other, among the first plate and the second plate disposed adjacently and holding the support beam between them, the first plate is attached to the first surface and is connected to the support beam through at least one fastener, and the second plate is attached to the second surface and is connected to the support beam through at least one fastener.

According to the implementation of one aspect of the present application, an inner side of the first surface and an inner side of the second surface are provided with the positioning portions, each positioning portion includes an insertion body and a fixing body with an installation groove, the insertion body is inserted into the installation groove and is detachably connected to the fixing body, and each positioning portion is connected to the support beam through the fixing body and is detachably connected to the fastener through the insertion body.

According to the implementation of one aspect of the present application, the fixing body and the support beam are integrally formed, the installation groove penetrates through at least one end of the fixing body along the extending direction, the support beam includes an opening communicating with each installation groove, and the fastener extends into the installation groove through the opening opposite to the fastener and is threadedly connected to the insertion body.

According to the implementation of one aspect of the present application, a first through groove and a second through groove in communication with the first through groove are provided inside the fixing body, and with respect to the extending direction, a cross section enclosing the first through groove is larger than a cross section enclosing the second through groove, wherein the first through groove and the second through groove jointly form the installation groove, the insertion body is located in the first through groove, and the fastener penetrates through the insertion body and extends to the second through groove.

According to the implementation of one aspect of the present application, the support beam includes a first mounting plate, a second mounting plate and an inclined plate, the first mounting plate and the second mounting plate are arranged to intersect with each other, the first surface is located on the first mounting plate, the second surface is located on the second mounting plate, the inclined plate is arranged to intersect with the first mounting plate and the second mounting plate respectively, and the first mounting plate, the second mounting plate and the inclined plate enclose and form the cavity.

According to the implementation of one aspect of the present application, at least one first plate includes two or more first plate units, and the two or more first plate units are arranged successively along the extending direction of the support beam, and the first plate units each have a first bending portion and a first extending portion extending into the accommodating chamber; the first extending portions of two adjacent first plate units abut against each other and are detachably connected to each other, the first bending portion of each of the first plate units is pressed against the support beam, and the first bending portion of at least one of the first plate units is connected to the support beam through the fastener.

According to the implementation of one aspect of the present application, at least one second plate includes two or more second plate units, the two or more second plate units are arranged successively along the extending direction of the support beam, and the second plate units each have a second bending portion and a second extending portion extending into the accommodating chamber; the second extending portions of two adjacent second plate units abut against each other and are detachably connected to each other, the second bending portion of each of the second plate units is pressed against the support beam, and the second bending portion of at least one of the second plate units is connected to the support beam through the fastener.

According to the implementation of one aspect of the present application, the nacelle cover further includes a support platform and a first adapter seat disposed in the accommodating chamber, the support platform is detachably connected to a surface of at least one first plate and/or at least one second plate facing the accommodating chamber through the first adapter seat.

According to the implementation of one aspect of the present application, the first adapter seat includes a first connecting portion and a second connecting portion which are arranged to intersect with each other, the first adapter seat is detachably connected to the first plate and/or the second plate through the first connecting portion, and the first adapter seat is detachably connected to the support platform through the second connecting portion.

According to the implementation of one aspect of the present application, the first connecting portion and the second connecting portion are both formed as plate-like members and are arranged perpendicular to each other.

According to the implementation of one aspect of the present application, the nacelle cover further includes a truss and a second adapter seat, one end of the truss is connected to the support beam through the second adapter seat, and the other end of the truss is connected to the support platform.

According to the implementation of one aspect of the present application, the second adapter seat includes a transition section, a first installation section and a second installation section, the first installation section and the second installation section are respectively connected to the transition section and extend opposite to each other, and the second adapter seat is connected to the support beam through the first installation section and is connected to the truss through the second installation section.

According to the implementation of one aspect of the present application, the transition section, the first installation section and the second installation section are formed into an integral member.

According to the implementation of one aspect of the present application, the transition section, the first installation section and the second installation section are formed as plate-like members, and the first installation section and the second installation section are respectively perpendicular to the transition section.

According to the implementation of one aspect of the present application, the cover casing further includes a first end plate and a second end plate, the first end plate is located at one end of the support beam along the extending direction of the support beam and is connected to the support beam, and the second end plate is located at the other end of the support beam along the extending direction of the support beam and is connected to the support beam.

According to the implementation of one aspect of the present application, the cover casing further includes a protrusion; a surface of at least one first plate close to and/or away from the accommodating chamber is provided with the protrusion; and/or, a surface of at least one second plate close to the accommodating chamber is provided with the protrusion.

On another aspect, the embodiments of the present application provide a wind turbine generator, including the above-mentioned nacelle cover.

According to the nacelle cover and the wind power generator provided by the embodiments of the present application, the nacelle cover includes the cover casing and the fasteners, and the cover casing includes the accommodating chamber, which can be used to accommodate a plurality of other components of the wind turbine generator and protect the various components. The adjacent first plate and second plate in at least one group holds the support beam between them, and the fasteners are disposed in the accommodating chamber to detachably connect the first plate and the second plate with the support beam, which not only facilitate transportation and assembly of the nacelle cover, and but also can greatly improve the strength of the formed nacelle cover through the support beam, thereby ensuring the stability and service life of the wind turbine generator. Further, the fasteners can extend into the support beam from the corresponding first plate and the second plate, so as to detachably connect the corresponding plates with the support beam; since the fasteners are disposed in the interior of the accommodating chamber, for detachably connecting the plates with the support beam, the fasteners can work for a long time and are not easy to be corroded. In addition, the above configuration can further enable the operators to complete the disassembly and assembly of the corresponding plates and the support beam by screwing the fasteners and to maintain and/or replace the assembled fasteners from the interior of the nacelle cover, which can avoid the operators from implementing the above operations at the outside of the nacelle cover, and thus, the nacelle cover provided by the embodiments of the present application also facilitates assembly and maintenance.

The features, advantages and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

In the drawings, the same components are given the same reference numerals. The accompanying drawings are not drawn to actual scale.

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and numerous specific details are disclosed in the following detailed description to provide a thorough understanding of the present application. However, it will be apparent to the person skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; and, the dimensions of some structures may be exaggerated for clarity. Furthermore, the features, structures or characteristics described below may be combined in any suitable manner in one or more embodiments.

The orientation words appearing in the following description all refer to directions shown in the accompanying drawings, and are not intended to limit the specific structures of the nacelle cover and the wind turbine generator of the present application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection, and may be a direct connection or an indirect connection. For the person skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

For a better understanding of the present application, the nacelle cover and the wind power generator according to the embodiments of the present application will be described in detail below with reference to <FIG>.

Referring to <FIG>, an embodiment of the present application provides a wind turbine generator, and the wind turbine generator mainly includes a wind turbine foundation <NUM>, a tower <NUM>, a nacelle, a generator <NUM> and an impeller <NUM>. The tower <NUM> is connected to the wind turbine foundation <NUM>, and the nacelle is disposed on a top of the tower <NUM>. The nacelle includes a nacelle cover <NUM>, and components such as converters and transformers are disposed inside the nacelle cover <NUM>. The generator <NUM> is disposed at the nacelle. The impeller <NUM> includes a hub <NUM> and a plurality of blades <NUM> connected to the hub <NUM>, and the impeller <NUM> is connected to a rotating shaft of the generator <NUM> through the hub <NUM>. When the wind acts on the blades <NUM>, the entire impeller <NUM> and the rotating shaft of the generator <NUM> are driven to rotate, so as to convert the wind energy into electrical energy.

In order to better satisfy the requirements of protecting the components such as the transformers, converters, located inside the nacelle and ensure the power generation requirements of the wind turbine generator, the embodiments of the present application provide a new type of nacelle cover <NUM>, which can be independently produced or sold as an independent component, and certainly, can also be used in the above-mentioned wind turbine generator and serve as a component of the wind turbine generator.

Referring to <FIG> in combination, the nacelle cover <NUM> provided by the embodiment of the present application includes a cover casing <NUM> and a fastener <NUM>, and the nacelle cover <NUM> includes first plates <NUM>, second plates <NUM> and at least one support beam <NUM>, wherein the first plates <NUM> and the second plates <NUM> are alternately arranged, and adjacent first plate <NUM> and second plate <NUM> in at least one group are spaced apart from each other and hold the support beam <NUM> between them. The first plates <NUM>, the second plates <NUM> and the support beams <NUM> are connected and jointly form an accommodating chamber 10a. There are two or more fasteners <NUM>, which are disposed in the accommodating chamber 10a, at least one fastener <NUM> extends from the first plate <NUM> into the support beam <NUM> and detachably connects the first plate <NUM> to the support beam <NUM>, and at least one fastener <NUM> extends from the second plate <NUM> into the support beam <NUM> and detachably connects the second plate <NUM> to the support beam <NUM>.

The nacelle cover <NUM> provided by the embodiments of the present application can satisfy the requirements of protecting multiple components of the wind turbine generator and have a high strength, and meanwhile, since the fasteners <NUM> extend from the corresponding first plate <NUM> and second plate <NUM> into the support beam <NUM>, the disassembly and assembly of the plates with the support beam <NUM> can be implemented inside the nacelle cover <NUM>, and thus the disassembly, assembly and maintenance are facilitated with higher safety performance.

As an optional implementation, the number of the first plates <NUM> and the second plates <NUM> can be set according to the shape requirements of the nacelle cover <NUM>. In some optional examples, each of the number of the first plates <NUM> and the second plates <NUM> can be two, and further may be more than two, for example, three, four or even more.

In some optional embodiments, both of the first plates <NUM> and the second plates <NUM> may be formed as flat plates, so that a cross section of the nacelle cover <NUM> as a whole is in a polygonal shape. Certainly, in some other examples, both of the first plates <NUM> and the second plates <NUM> further may be formed as curved plates, so that a cross section of the nacelle cover <NUM> as a whole is substantially in a circular shape.

As an optional embodiment, the adjacent first plate <NUM> and second plate <NUM> in each group are spaced apart from each other and hold the support beam <NUM> between them, and each support beam <NUM> is at least partially located outside the accommodating chamber 10a. With the above configuration, not only the strength of the nacelle cover <NUM> as a whole can be improved, but also each of the first plate <NUM> and the second plate <NUM> can be held between two adjacent support beams <NUM>, thereby facilitating the disassembly and assembly of the first plate <NUM> and the second plate <NUM> with the corresponding support beams <NUM> through the fasteners <NUM> and further ensuring the operation safety of the operators. Further, by limiting the support beam <NUM> to be at least partially located outside the accommodating chamber 10a, contact areas of the support beam <NUM> with the corresponding first plate <NUM> and the second plate <NUM> can be increased, thereby better ensuring the connection strength of the support beam <NUM> with the first plate <NUM> and the second plate <NUM>.

In some optional examples, the support beam <NUM> is formed as a prismatic member and includes a first surface <NUM> and a second surface <NUM> which are arranged to intersect with each other, and among the first plate <NUM> and the second plate <NUM> that are disposed adjacently and hold the support beam <NUM>, the first plate <NUM> is attached to the first surface <NUM> and is connected to the support beam <NUM> by at least one fastener <NUM>, and the second plate <NUM> is attached to the second surface <NUM> and is connected to the support beam <NUM> by at least one fastener <NUM>. By limiting the support beam <NUM> to include the first surface <NUM> and the second surface <NUM> which are arranged to intersect with each other, the attachment of the support beam <NUM> to the corresponding first plate <NUM> and the second plate <NUM> can be facilitated, thereby further increasing the contact areas of the support beam <NUM> with the first plate <NUM> and the second plate <NUM>, and better satisfying the requirements that the fasteners <NUM> extend into the support beam <NUM> from the inside of the accommodating chamber 10a of the nacelle cover <NUM> and connect the first plate <NUM> and the second plate <NUM> to the support beam <NUM> respectively.

Further, by limiting the first surface <NUM> and the second surface <NUM> to intersect with each other, the adjacent first plate <NUM> and the second plate <NUM> can made to intersect with each other, thereby facilitating the formation of the accommodating chamber 10a of the nacelle cover <NUM>.

In some optional embodiments, the first surface <NUM> and the second surface <NUM> are perpendicular to each other, which can better satisfy the requirements of respectively connecting the first plate <NUM> and the second plate <NUM> to the support beam <NUM> through the fasteners <NUM>.

Optionally, the fasteners <NUM> may be bolts, screws or other components capable of detachably connecting the first plate <NUM> and the second plate <NUM> to the support beam <NUM> respectively.

In some optional embodiments, the first plate <NUM> is provided with a first bending edge that is bent toward the inside of the accommodating chamber 10a, on a side facing the corresponding support beam <NUM>, and the first plate <NUM> can abut against the first surface <NUM> through the first bending edge and is detachably connected to the support beam <NUM> through the fasteners <NUM>. Similarly, the second plate <NUM> is provided with a second bending edge that is bent toward the inside of the accommodating chamber 10a, on a side facing the corresponding support beam <NUM>, and the second plate <NUM> can abut against the second surface <NUM> through the second bending edge and is detachably connected to the support beam <NUM> by the fasteners <NUM>. With the above configuration, the operators can disassemble and assemble the first plate <NUM> and the second plate <NUM> inside the accommodating chamber 10a, and thus the maintenance is more convenient.

Continuing to refer to <FIG>, as an optional embodiment, the support beam <NUM> includes a cavity <NUM> which penetrates through the support beam <NUM> along an extending direction X of the support beam <NUM>, a positioning portion <NUM> is provided in the cavity <NUM>, and the fastener <NUM> is detachably connected to the support beam <NUM> through the positioning portion <NUM>. By defining the support beam <NUM> to include the cavity <NUM> which penetrates through the support beam <NUM> along the extending direction X of the support beam <NUM>, the effects of weight and cost reduction of the support beam can be achieved. Meanwhile, the ends of the fasteners <NUM> that extend outward from the inside of the accommodating chamber 10a and connect the first plate <NUM> or the second plate <NUM> to the support beam <NUM>, can be protected by the support beam <NUM>, and thus can be avoided from being eroded and corroded by rainwater or the like, thereby improving the service life of the fastener <NUM>. Therefore, the maintenance cost of the nacelle cover <NUM> is reduced, the safe and stable operation of the wind turbine generator applied with the nacelle cover <NUM> is ensured, and the power generation benefit is ensured. Moreover, by disposing the positioning portion <NUM> inside the cavity <NUM>, the connection between the fasteners <NUM> and the support beam <NUM> can be more facilitated, and the thickness of the side wall of the support beam <NUM> for connecting and forming the cavity <NUM> can be reduced, thereby better satisfying the requirements of weight and cost reduction.

In some optional embodiments, an inner side of the first surface <NUM> and an inner side of the second surface <NUM> are each provided with the positioning portion <NUM>, so as to ensure that the fasteners <NUM> for connecting the support beam <NUM> to the first plate <NUM> and the second plate <NUM> all can be effectively connected and fixed.

Continuing to refer to <FIG>, optionally, the positioning portion <NUM> may include a fixing body <NUM> and an insertion body <NUM>, the fixing body <NUM> includes an installation groove 141a, the insertion body <NUM> is inserted into the installation groove 141a and is detachably connected to the fixing body <NUM>, and the positioning portion <NUM> is connected to the support beam <NUM> through the fixing body <NUM> and is detachably connected to the fastener <NUM> through the insertion body <NUM>. By adopting the above-mentioned configuration, the positioning portion <NUM> can not only satisfy the requirements of the detachable connection between the fastener <NUM> and the support beam <NUM>, but also, due to the detachable connection between the insertion body <NUM> and the installation groove 141a, can allow replacement of the insertion body <NUM>, thereby avoiding the failure of the entire support beam <NUM> due to the damage of the insertion body <NUM>.

As an optional implementation, the fixing body <NUM> and the support beam <NUM> are integrally formed, which facilitates the forming of the fixing body <NUM> and also can ensure the connection strength between the fixing body <NUM> and the support beam <NUM>. Optionally, the installation groove 141a penetrates at least one end of the fixing body <NUM> along the extending direction X of the support beam <NUM>, and optionally penetrates through the at least one end of the fixing body <NUM> in the extending direction X.

As an optional implementation, the fixing body <NUM> includes a first through groove 141b and a second through groove 141c in communication with the first through groove 141b in it, and with respect to a length direction or the extending direction X of the support beam <NUM>, a cross section enclosing the first through groove 141b is larger than a cross section enclosing the second through groove 141c. That is, a cross-section of a wall of the fixing body <NUM> for enclosing and forming the installation groove 141a with respect to the length direction of the support beam <NUM> is in a shape of a Chinese character "<IMG>" as a whole.

The insertion body <NUM> may be located in the first through groove 141b, and the fastener <NUM> for connecting the first plate <NUM> to the support beam <NUM> or for connecting the second plate <NUM> to the support beam <NUM> penetrates through the insertion body <NUM> and extends to the second through groove 141c. By adopting the above-mentioned configuration, the fixing body <NUM> can not only satisfy the installation requirements of the insertion body <NUM> and ensure the fixing requirements of the fastener <NUM>, but also can be applicable to the fixing of the first plate <NUM> and second plate <NUM> of different thicknesses by adjusting the screw-in depth of the fastener <NUM>.

In some optional examples, the support beam <NUM> includes an opening <NUM> in communication with each installation groove 141a, and the fastener <NUM> extends into the installation groove <NUM> through the opening <NUM> opposite to the fastener <NUM> and is threadedly connected to the insertion body <NUM>. By the above configuration, it not only can facilitate the fastener <NUM> to protrude outward and into the support beam <NUM> from the accommodating chamber 10a, but also can facilitate the fastener <NUM> to slide along the extending direction X of the support beam <NUM>, so that the first plate <NUM> and/or the second plate <NUM> can be disassembled and assembled by pulling the insertion body <NUM>, thereby providing various forms for the disassembly and assembly of the first plate <NUM> and the second plate <NUM>.

In some optional examples, the support beam <NUM> includes a first mounting plate 13a and a second mounting plate 13b which are arranged to intersect with each other, the first surface <NUM> is located on the first mounting plate 13a, and the second surface <NUM> is located on the second mounting plate 13b. Optionally, the support beam <NUM> further includes an inclined plate 13c located between the first mounting plate 13a and the second mounting plate 13b, a main body of the inclined plate 13c is arranged to intersect with the first mounting plate 13a and the second mounting plate 13b, an end of the main body facing the first mounting plate 13a is inclined toward the first mounting plate 13a and is arranged perpendicular to the first mounting plate 13a, and an end of the main body of the inclined plate 13c facing the second mounting plate 13b is inclined toward the second mounting plate 13b and is arranged perpendicular to the second mounting plate 13b. The first mounting plate 13a, the second mounting plate 13b and the inclined plate 13c are connected to form a trapezoid as a whole, and the formed cavity <NUM> is a trapezoidal cavity. By adopting the above structural form, which is an optional optimized form, the support beam, on the basis of satisfying the overall strength enhancement of the nacelle cover and the connection requirements between the first plate <NUM> and the second plate <NUM>, can further improve the stability of the nacelle cover <NUM>, improve the force applied on the first plate <NUM> and the second plate <NUM>, lower requirements on material properties, and further reduce costs.

Referring to <FIG> in combination, as an optional implementation, in the nacelle cover <NUM> provided by the above embodiments, at least one first plate <NUM> includes two or more first plate units <NUM>, and the two or more first plate units <NUM> are arranged successively along the extending direction X of the support beam <NUM>; each first plate unit <NUM> includes a first bending portion 111a and a first extending portion 111b extending into the accommodating chamber 10a, the first extending portions 111b of two adjacent first plate units <NUM> abut against each other and are detachably connected to each other, the first bending portion 111a of each first plate unit <NUM> is pressed against the support beam <NUM>, and the first bending portion 111a of at least one first plate unit <NUM> is connected to the support beam <NUM> by the fastener <NUM>. The first bending portions 111a of all the first plate units <NUM> jointly constitute the above-mentioned first bending edge.

By adopting the above-mentioned structural form, the first plate <NUM> can not only satisfy the protection requirements for the internal components of the nacelle cover <NUM>, but also can facilitate mass-production and transportation of the first plate units <NUM>, which can significantly reduce difficulty and cost of production and transportation. Each first plate unit <NUM> can be applied to one or more types of wind turbine generators, and it is only necessary to exchange the support beam <NUM> to different specifications, the first plate units <NUM> can be assembled into the nacelle cover <NUM> of various specifications to satisfy the requirements of multiple types of generators, which make the nacelle cover <NUM> to have greater flexibility and universality.

Referring to <FIG> in combination, as an optional implementation, in the nacelle cover <NUM> provided by the above embodiments, at least one second plate <NUM> includes two or more second plate units <NUM>, and the two or more second plate units <NUM> are arranged successively along the extending direction X of the support beam <NUM>; each second plate unit <NUM> includes a second bending portion 121a and a second extending portion 121b extending into the accommodating chamber 10a. The second extending portions 121b of two adjacent second plate units <NUM> abut against each other and are detachably connected to each other, the second bending portion 121a of each second plate unit <NUM> is pressed against the support beam <NUM>, and the second bending portion 121a of at least one second plate unit <NUM> is connected to the support beam <NUM> by the fastener <NUM>. The second bending portions 121a of all the second plate units <NUM> jointly constitute the above-mentioned second bending edge.

Similarly, by adopting the above-mentioned structural form, the second plate <NUM> can not only satisfy the protection requirements for the internal components of the nacelle cover <NUM>, but also can facilitate mass-production and transportation of the second plate units <NUM>, which can significantly reduce difficulty and cost of production and transportation. Each second plate unit <NUM> can be applicable to one or more types of wind turbine generators, and it is only necessary to exchange the support beam <NUM> to different specifications, the second plate units <NUM> can be assembled into the nacelle cover <NUM> of various specifications to satisfy the requirements of multiple types of generators, which make the nacelle cover <NUM> to have greater flexibility and universality.

In a specific implementation, each first plate <NUM> may include two or more first plate units <NUM>, each second plate <NUM> may include two or more second plate units <NUM>, and the number of the first plate units <NUM> and the second plate units <NUM> can be adjusted flexibly according to the specification of the nacelle cover <NUM>, so as to better meet the requirements of different types of nacelle covers <NUM> and ensure that the first plate units <NUM> and the second plate units <NUM> can be reused.

Optionally, the first plate unit <NUM> and the second plate unit <NUM> may have the same structure, and by the above configuration, mass production of the corresponding plate units of the nacelle cover <NUM> can be achieved to the greatest extent.

As an optional implementation, in the nacelle cover <NUM> provided in the above embodiments, the cover casing <NUM> further includes a protrusion <NUM>, and a surface of at least one first plate <NUM> close to and/or away from the accommodating chamber 10a is provided with the protrusion <NUM>. That is, the protrusion <NUM> may be located inside the accommodating chamber 10a, and certainly, in some other examples, may be located outside the accommodating chamber 10a, and when located outside the accommodating chamber 10a, the protrusion <NUM> can further be used as an installation fulcrum for components of the wind turbine generator located outside the nacelle cover <NUM> to better satisfy the usage requirements of the wind turbine generator.

In some optional examples, the protrusion <NUM> is provided on a surface of at least one second plate <NUM> close to the accommodating chamber 10a, and the protrusion <NUM> located on the second plate <NUM> may also be located inside the accommodating cavity 10a, and certainly may located outside the accommodating chamber 10a, and when located inside the accommodating chamber 10a, the protrusion 15a can further be used to connect with components located inside the accommodating chamber 10a.

In a specific implementation, the protrusion <NUM> may be connected to the first plate <NUM> and the second plate <NUM> by welding, and certainly, in some other examples, the protrusion <NUM> may further be formed by pressing the first plate <NUM> and the second plate <NUM>, as long as the reinforcement and connection requirements can be satisfied.

Optionally, in a specific implementation, the protrusion <NUM> may be located on the first plate units <NUM> corresponding to the first plate <NUM> and on the second plate units <NUM> corresponding to the second plate <NUM>.

Referring to <FIG> in combination, as an optional implementation, the nacelle cover <NUM> of the above-mentioned embodiments further includes a support platform <NUM> and a first adapter seat <NUM> disposed in the accommodating chamber 10a, and the support platform <NUM> is detachably connected to a surface of at least one first plate <NUM> and/or at least one second plate <NUM> facing the accommodating chamber 10a through the first adapter seat <NUM>. By providing the first adapter seat <NUM>, when the nacelle cover <NUM> includes the support platform <NUM>, the support platform <NUM> can be connected to the first plate <NUM> and/or the second plate <NUM> through the first adapter seat <NUM>, so that not only the installation requirements of the support platform <NUM> can be satisfied, but also the connection strength of the support platform <NUM> can be ensured, and meanwhile, the disassembly and assembly process of the support platform <NUM> can be simplified.

Optionally, the first adapter seat <NUM> may include a first connecting portion <NUM> and a second connecting portion <NUM> which are arranged to intersect with each other, and the first adapter seat <NUM> is detachably connected to the first plate <NUM> and/or the second plate <NUM> through the first connecting portion <NUM>, and is detachably connected to the support platform <NUM> through the second connecting portion <NUM>. By adopting the above-mentioned form, the first adapter seat <NUM> has a simplified structure and low cost, and meanwhile, can satisfy the connection requirements with the support platform <NUM> and the first plate <NUM> and/or the second plate <NUM>.

As an optional implementation, both of the first connecting portion <NUM> and the second connecting portion <NUM> may be formed as plate-like members, which can increase the contact areas of the support platform <NUM> with the first plate <NUM> and/or the second plate <NUM>, so as to better ensure the connection strength between the support platform <NUM> and the first plate <NUM> and/or the second plate <NUM>.

In some optional embodiments, the first connecting portion <NUM> and the second connecting portion <NUM> are perpendicular to each other, which can optimize the force applied to the support platform <NUM> and the first plate <NUM> and/or the second plate <NUM>, thereby improving the safety performance of the nacelle cover <NUM>.

In some optional examples, when the first plate <NUM> and/or the second plate <NUM> include the protrusion <NUM>, the first connecting portion <NUM> may be connected to the first plate <NUM> and/or the second plate <NUM> through the protrusion <NUM>, which can effectively avoid the damage to the first plate <NUM> and/or the second plate <NUM>, thereby ensuring the service life of the nacelle cover <NUM>.

Continuing to refer to <FIG>, in some optional embodiments, the nacelle cover <NUM> further includes a truss <NUM> and a second adapter seat <NUM>, one end of the truss <NUM> is connected to the support beam <NUM> through the second adapter seat <NUM>, and the other end of the truss <NUM> is connected to the support platform <NUM>. By providing the truss <NUM>, the bearing capacity of the support platform <NUM> can be further improved, and the safety performance of the wind turbine generator can be better ensured.

As an optional implementation, the second adapter seat <NUM> may include a transition section <NUM>, a first installation section <NUM> and a second installation section <NUM>, and the first installation section <NUM> and the second installation section <NUM> are respectively located on two sides of the transition section <NUM> and extend opposite each other. The second adapter seat <NUM> is connected to the support beam <NUM> through the first installation section <NUM> and is connected to the truss <NUM> through the second installation section <NUM>. By adopting the above form, the second adapter seat <NUM> has a simple structure, is easy to manufacture, and can ensure the connection requirements between the truss <NUM> and the support beam <NUM>.

Optionally, the transition section <NUM>, the first installation section <NUM> and the second installation section <NUM> may be formed into an integral member, thereby being easy to form, and being able to ensure the connection strength among the three.

Optionally, each of the transition section <NUM>, all of the first installation section <NUM> and the second installation section <NUM> are formed as plate-like members, and the first installation section <NUM> and the second installation section <NUM> are respectively perpendicular to the transition section <NUM>, so that, on the basis of satisfying the connection requirements between the truss <NUM> and the support beam <NUM>, the force applied to the truss <NUM> and the support beam <NUM> can be further optimized, and the service life of the nacelle cover <NUM> can be improved.

Optionally, when the second adapter seat <NUM> is connected to the support beam <NUM>, it can be connected to the support beam <NUM> through the fasteners <NUM> for connecting the second plate <NUM> and the support beam <NUM>; by the above configuration, not only the connection requirements between the second adapter seat <NUM> and the support beam <NUM> can be satisfied, but also the nacelle cover <NUM> can be further simplified and easy to form.

As an optional implementation, the cover casing <NUM> further includes a first end plate <NUM> and a second end plate <NUM>, the first end plate <NUM> is located at one end of the support beam <NUM> along the extending direction X of the support beam <NUM> and is connected to the support beam <NUM>, and the second end plate <NUM> is located at the other end of the support beam <NUM> along the extending direction X of the support beam <NUM> and is connected to the support beam <NUM>. By providing the first end plate <NUM> and the second end plate <NUM>, the protection requirements of the nacelle cover <NUM> for the internal components of the wind turbine generator can be better ensured. Meanwhile, the cover casing <NUM> can be connected to the devices such as the hub <NUM> through the second end plate <NUM>, the power generation benefit of the wind turbine generator can be ensured.

Optionally, in order to facilitate the connection with the tower <NUM>, optionally, the nacelle cover <NUM> is provided with a mounting hole <NUM> on the first plate <NUM> disposed close to the tower <NUM>, so as to be connected with the tower <NUM> through a yaw system.

Based on the above contents, the nacelle cover <NUM> provided in the embodiments of the present application includes the cover casing <NUM> and the fasteners <NUM>, and the cover casing <NUM> includes the accommodating chamber 10a, and thus the nacelle cover <NUM> can be used to accommodate multiple other components of the wind turbine generator and provide protection for the various components. By limiting that the adjacent first plate <NUM> and second plate <NUM> in at least one group hold the support beam <NUM> between them, and meanwhile, limiting that the fasteners <NUM> are disposed in the accommodating chamber 10a and extend into the support beam <NUM> from the corresponding first plates <NUM> and the second plates <NUM> so as to detachably connect the corresponding plates with the support beam <NUM>, not only the transportation and assembly of the nacelle cover <NUM> can be facilitated, but also the arrangement of the support beam <NUM> can greatly improve the strength of the formed nacelle cover <NUM>, thereby ensuring the stability and service life of the wind turbine generator.

Since the fasteners <NUM> are disposed inside the accommodating chamber 10a and detachably connect the plates with the support beam <NUM>, the fasteners <NUM> can work for a long time and are not easily corroded. In addition, by the above configuration, the operators can complete the disassembly and assembly of the corresponding plates and the support beam <NUM> by screwing the fasteners <NUM> and maintain and/or replace the assembled fasteners <NUM> inside the nacelle cover <NUM>, the operators can be avoided from performing the above operations outside the nacelle cover <NUM>. Therefore, the nacelle cover <NUM> provided in the embodiments of the present application is also convenient for assembly and maintenance.

Meanwhile, by limiting the first plate <NUM> to the structural form of more than two first plate units <NUM> and the connection requirements thereof, and/or limiting the second plate <NUM> to the structural form of more than two second plate units <NUM> and the connection requirements thereof, the nacelle cover <NUM> is easy to be mass-produced and transported, which can significantly reduce the difficulty and cost of production and transportation. Moreover, the requirements of various generators for different structural forms of the nacelle cover <NUM> can be satisfied better, and thus the casing of the nacelle cover <NUM> has greater flexibility and universality.

The wind turbine generator provided in the embodiments of the present application includes the nacelle cover <NUM> of the above-mentioned embodiments, and thus has high safety performance, and can ensure the safety of operators when maintaining the nacelle cover <NUM> and internal devices, thereby being easy to promote and use.

Claim 1:
A nacelle cover (<NUM>), comprising:
a cover casing (<NUM>), comprising a first plate (<NUM>), a second plate (<NUM>) and at least one support beam (<NUM>), the first plate (<NUM>) and the second plate (<NUM>) being alternately arranged in a circumferential direction perpendicular to an extending direction (X) of the support beam (<NUM>), the first plate (<NUM>) and the second plate (<NUM>) adjacent each other forming a group, the first plate (<NUM>) and the second plate (<NUM>) in the group being spaced apart from each other in the circumferential direction and holding the support beam (<NUM>) between them, and the first plate (<NUM>), the second plate (<NUM>) and the support beam (<NUM>) being connected and jointly forming an accommodating chamber (10a); and
fasteners (<NUM>), wherein there are two or more fasteners (<NUM>) disposed inside the accommodating chamber (10a), at least one fastener (<NUM>) detachably connects the first plate (<NUM>) to the support beam (<NUM>), and at least one fastener (<NUM>) detachably connects the second plate (<NUM>) to the support beam (<NUM>),
characterized in that each support beam (<NUM>) is at least partially located outside the accommodating chamber (10a), and
the support beam (<NUM>) comprises a cavity (<NUM>) penetrating through the support beam (<NUM>) along its own extending direction (X), two or more positioning portions (<NUM>) are disposed in the cavity (<NUM>), and the fasteners (<NUM>) are detachably connected to the support beam (<NUM>) through the positioning portions (<NUM>).