CN215860621U - Engine room and wind generating set - Google Patents

Abstract

The utility model relates to the technical field of wind power generation, and provides a cabin and a wind generating set, wherein the cabin comprises a front underframe and a rear underframe, and also comprises a connecting assembly and a transformer, wherein the transformer is suspended below the rear underframe, and the connecting assembly is arranged above the front underframe and the rear underframe and is respectively connected with the front underframe and the rear underframe; according to the utility model, the transformer is suspended below the rear underframe, so that the length of the rear underframe can be reduced, and the connecting assembly is arranged above the front underframe and the rear underframe and is respectively connected with the front underframe and the rear underframe, so that the connecting strength of the front underframe and the rear underframe can be enhanced by using the connecting assembly, the rear underframe is prevented from being deformed and bent downwards, the mechanical strength of the whole engine room is improved, and the normal operation of the wind generating set comprising the engine room is ensured.

Description

Engine room and wind generating set

Technical Field

The utility model relates to the technical field of wind power generation, in particular to a cabin and a wind generating set.

Background

A wind generating set (hereinafter referred to as a fan) is a device for converting wind energy into electric energy. A conventional wind turbine generally includes a tower, a nacelle disposed on the top of the tower, and a pitch system disposed at an end of the tower, wherein the nacelle includes a front underframe and a rear underframe inside, and electrical equipment required by the wind turbine, such as a transmission system, a power generation system, a transformer, an electrical cabinet, and the like.

In the prior art, in order to optimize the structure of the fan, a transmission system is usually installed on a front underframe arranged at the top end of a tower, and a generator system, an electrical cabinet, a transformer and other structures are installed on a rear underframe, so that the rear underframe is easily overlong due to the arrangement mode. However, the rear underframe and the front underframe are connected only by welding or bolt connection, and the bottom of the rear underframe is not supported and is in a suspended state, so that the rear underframe is prone to seriously deform and bend downwards, the strength of the overall structure of the engine room is reduced, and the normal operation of the wind generating set is affected.

SUMMERY OF THE UTILITY MODEL

The problem solved by the utility model is how to improve the mechanical strength of the nacelle.

In order to solve the above problems, the present invention provides a nacelle, including a front chassis, a rear chassis, a connecting assembly and a transformer, wherein the transformer is suspended below the rear chassis, and the connecting assembly is disposed above the front chassis and the rear chassis and is respectively connected to the front chassis and the rear chassis.

Optionally, the bottom of the rear chassis is provided with a plurality of suspension structures arranged at intervals, and the transformer is connected with the suspension structures.

Optionally, coupling assembling includes connecting portion, connecting portion include first bracing piece, first pull rod structure and second pull rod structure, first bracing piece set up in preceding chassis and/or on the back chassis, first pull rod structure set up in on the preceding chassis, second pull rod structure set up in on the back chassis, first pull rod structure deviate from the one end of preceding chassis with second pull rod structure deviates from the one end of back chassis respectively with first bracing piece is connected.

Optionally, the first pull rod structure includes a first diagonal rod, the second pull rod structure includes a second diagonal rod, the top and the bottom of the first diagonal rod are respectively connected with the first support rod and the front chassis, and the top and the bottom of the second diagonal rod are respectively connected with the first support rod and the rear chassis.

Optionally, the first pull rod structure further comprises a second support rod and a first longitudinal beam, the second pull rod structure further comprises a third support rod and a second longitudinal beam, the second support rod is arranged on the front underframe and connected with the bottom of the first diagonal rod, and the first longitudinal beam is arranged between the first support rod and the second support rod; the first support rod and the second inclined rod are respectively connected with the second longitudinal beam, the third support rod is arranged on the rear underframe, and one end of the second longitudinal beam, which is far away from the first support rod, is connected with one end of the third support rod, which is far away from the rear underframe.

Optionally, the length of the second longitudinal beam is less than or equal to the length of the rear chassis.

Optionally, the connecting assembly further comprises a beam structure, the number of the connecting portions is at least two, at least two connecting portions are arranged above the front chassis and the rear chassis at intervals, and the beam structure is arranged between two adjacent connecting portions and is respectively connected with two adjacent connecting portions.

Optionally, the connecting assembly further includes a connecting plate, the connecting plate is disposed on the front chassis and the rear chassis and respectively connected to the front chassis and the rear chassis, and an area of the connecting plate matches with a sum of areas of the front chassis and the rear chassis.

Optionally, the nacelle further comprises a reinforcement structure provided on the rear undercarriage.

Compared with the prior art, the transformer is suspended below the rear underframe, so that the length of the rear underframe can be reduced, the connecting assemblies are arranged above the front underframe and the rear underframe and are respectively connected with the front underframe and the rear underframe, so that the connecting strength of the front underframe and the rear underframe is enhanced by the connecting assemblies, the rear underframe is prevented from deforming and bending downwards, the mechanical strength of the whole engine room is improved, and the normal operation of the wind generating set comprising the engine room is ensured.

The utility model also provides a wind generating set, which comprises the engine room, and the beneficial effects of the wind generating set are the same as those of the engine room, and are not repeated herein.

Drawings

FIG. 1 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a nacelle according to an embodiment of the present invention.

Description of reference numerals:

1-a transmission system; 2-a generator system; 3-an electrical cabinet; 4-front chassis; 5-rear bottom frame; 6-a connecting part; 61-a first support bar; 62-a first tie bar configuration; 621-a first diagonal; 622-second support bar; 623-a first stringer; 63-a second tie bar configuration; 631-a second diagonal; 632-a third support bar; 633-a second stringer; 7-a beam structure; 8-a reinforcing structure; 9-a tower drum; 10-transformer.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the coordinate system XYZ provided herein, the X axis represents the right direction in the forward direction, the X axis represents the left direction in the reverse direction, the Y axis represents the front direction, the Y axis represents the rear direction in the reverse direction, the Z axis represents the upper direction in the forward direction, and the Z axis represents the lower direction in the reverse direction. Also, it is noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the terms "an embodiment," "one embodiment," and "one implementation," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or implementation is included in at least one embodiment or example implementation of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

In the prior art, a wind generating set generally includes a tower, a nacelle, a pitch system, a transmission system arranged in the nacelle, a generator system, a transformer and an electrical cabinet, where the pitch system, such as an impeller, is arranged at an end of the nacelle and connected with the transmission system, the transmission system is connected with the generator system, the generator system is connected with the transformer, and the transmission system, the generator system and the transformer are respectively electrically connected with the electrical cabinet; the engine room comprises a front underframe and a rear underframe, the front underframe is arranged at the top of the tower barrel, the front underframe and the rear underframe are fixedly connected by bolts or welding, the rear underframe is in a suspension device, namely, a supporting structure is not arranged below the rear underframe, a transmission system is usually arranged on the front underframe, and a generator system, a transformer and an electrical cabinet are arranged on the upper part of the rear underframe, so that the load of devices on the rear underframe is heavy, the volume is large, the rear underframe is overlong, and no supporting structure is arranged below the rear underframe, the rear underframe is easy to deform and bend downwards seriously, and the normal operation of the wind generating set is influenced.

With reference to fig. 1 and 2, an embodiment of the present invention provides a nacelle, including a front chassis 4 and a rear chassis 5, further including a connection assembly and a transformer 10, where the transformer 10 is suspended below the rear chassis 5, and the connection assembly is disposed above the front chassis 4 and the rear chassis 5 and is connected to the front chassis 4 and the rear chassis 5, respectively.

It should be noted that, the opposite ends of the front chassis 4 and the rear chassis 5 are fixedly connected, for example, by bolts or welding, the connecting assembly is disposed above the front chassis 4 and the rear chassis 5, and the front chassis 4 and the rear chassis 5 are connected from the upper region, so that the connecting strength between the front chassis 4 and the rear chassis 5 can be enhanced, and the rear chassis 5 can be prevented from being deformed and bent downward. By moving and mounting the transformer 10 from above the rear chassis 5 to below the rear chassis 5 to fully utilize the area below the rear chassis 5, the length and the occupied space of the rear chassis 5 can be reduced, which corresponds to an increase in the strength of the rear chassis 5.

Through hanging transformer 10 in the below of rear chassis 5 in this embodiment to can reduce rear chassis 5's length, through setting up coupling assembling in the top of preceding chassis 4 and rear chassis 5, and respectively rather than being connected, thereby utilize coupling assembling to strengthen the joint strength of preceding chassis 4 and rear chassis 5, avoid rear chassis 5 bending of warping downwards, in order to improve the mechanical strength in whole cabin, in order to guarantee to contain the wind generating set's in cabin normal operating.

In one embodiment of the present invention, the bottom of the rear chassis 5 is provided with a plurality of suspension structures arranged at intervals, and the transformer 10 is connected with the suspension structures.

It should be noted that, the suspension structure is arranged at the bottom of the rear chassis 5, so that the transformer 10 is connected with the suspension structure conveniently, and the connection position of the suspension structure on the rear chassis 5 can be flexibly adjusted according to the size of the transformer 10 due to the arrangement of the plurality of suspension structures at intervals, so that the suspension structure is suitable for suspension installation of transformers 10 with different specifications.

The suspension structure may be a hook, a hanging ring, a hanging rod, a hanging hole structure, etc., and the suspension structure connecting the transformer 10 and the rear chassis 5 together is applicable to the technical solution, and is not specifically limited herein. The suspension structure may be disposed at the bottom center of the rear chassis 5, or may be disposed on the left and right side plates of the rear chassis 5, and the specific disposition position thereof may be flexibly adjusted according to the device load above the rear chassis 5, the length and width of the rear chassis 5, and the size of the transformer 10.

In an embodiment of the present invention, as shown in fig. 2, the connecting assembly includes a connecting portion 6, the connecting portion 6 includes a first supporting rod 61, a first pull rod structure 62 and a second pull rod structure 63, the first supporting rod 61 is disposed on the front chassis 4 and/or the rear chassis 5, the first pull rod structure 62 is disposed on the front chassis 4, the second pull rod structure 63 is disposed on the rear chassis 5, and an end of the first pull rod structure 62 facing away from the front chassis 4 and an end of the second pull rod structure 63 facing away from the rear chassis 5 are respectively connected to the first supporting rod 61.

It should be noted that, by respectively arranging the first pull rod structure 62 and the second pull rod structure 63 on the front chassis 4 and the rear chassis 5, and respectively connecting the top end of the first pull rod structure 62 and the top end of the second pull rod structure 63 with the first support rod 61, at this time, by using the cooperation of the first support rod 61, the first pull rod structure 62 and the second pull rod structure 63, the front chassis 4 and the rear chassis 5 can be respectively connected and fastened from the top of the front chassis 4 and the rear chassis 5, so as to pull the rear chassis 5, so as to prevent the rear chassis 5 from being deformed and bent downward.

Wherein, first bracing piece 61 can set up the top of preceding chassis 4 and be close to the one end of back chassis 5, also can set up the top of back chassis 5 and be close to the one end of preceding chassis 4, can also set up the junction at preceding chassis 4 and back chassis 5, because first pull rod structure 62 and second pull rod structure 63 are located the both sides of first bracing piece 61 respectively and are connected with preceding chassis 4 and back chassis 5 respectively to can strengthen preceding chassis 4 and the mechanical strength of back chassis 5.

In one embodiment of the present invention, as shown in fig. 2, the first pull rod structure 62 includes a first inclined rod 621, the second pull rod structure 63 includes a second inclined rod 631, a top and a bottom of the first inclined rod 621 are respectively connected to the first support rod 61 and the front chassis 4, and a top and a bottom of the second inclined rod 631 are respectively connected to the first support rod 61 and the rear chassis 5.

It should be noted that, the top and the bottom of the first inclined rod 621 are respectively connected to the first support rod 61 and the front underframe 4, and the top and the bottom of the second inclined rod 631 are respectively connected to the first support rod 61 and the rear underframe 5, at this time, the first inclined rod 621, the first support rod 61 and the front underframe 4 enclose a triangle, and the second inclined rod 631, the first support rod 61 and the rear underframe 5 enclose a triangle, so that the connection strength between the rear underframe 5 and the front underframe 4 can be enhanced by using the stability characteristics of the triangle to ensure the mechanical strength of the nacelle.

The first support rod 61 may be perpendicular to the front chassis 4 or the rear chassis 5, and the lengths of the first inclined rod 621 and the second inclined rod 631 may be flexibly adjusted according to the lengths of the front chassis 4 and the rear chassis 5, so the included angles between the first inclined rod 621 and the first support rod 61 and the included angles between the second inclined rod 631 and the first support rod 621 are not specifically limited herein.

In an embodiment of the present invention, the first pull rod structure 62 further includes a second support rod 622 and a first longitudinal beam 623, the second pull rod structure 63 further includes a third support rod 632 and a second longitudinal beam 633, the second support rod 622 is disposed on the front chassis 4 and connected to a bottom of the first inclined rod 621, and the first longitudinal beam 623 is disposed between the first support rod 61 and the second support rod 622; the first support rod 61 and the second inclined rod 631 are respectively connected with the second longitudinal beam 633, the third support rod 632 is arranged on the rear chassis 5, and one end of the second longitudinal beam 633 departing from the first support rod 61 is connected with one end of the third support rod 632 departing from the rear chassis 5.

It should be noted that, by connecting the first inclined bar 621 provided on the front chassis 4 and the second inclined bar 631 provided on the rear chassis 5 with the first support bar 61 respectively, so that the joints of the first inclined bar 621 and the second inclined bar 631 with the front chassis 4 and the rear chassis 5 form a triangle, both ends of the first longitudinal beam 623 are respectively connected with the first support bar 61 and the second support bar 622, and both ends of the second longitudinal beam 633 are respectively connected with the second inclined bar 631 and the third support bar 632, so that a triangle is enclosed among the first longitudinal beam 623, the second support rod 622 and the first inclined rod 621, a triangle is enclosed among the second longitudinal beam 633, the second inclined rod 631 and the third support rod 632, and the second support bar 622 and the third support bar 632 are connected with the front chassis 4 and the rear chassis 5 respectively, and further, the stable characteristic of a plurality of triangles is utilized to further strengthen the connection strength of the front chassis 4 and the rear chassis 5.

The second support rod 622 and the front chassis 4 are disposed at an included angle, for example, the installation included angle between the second support rod 622 and the front chassis 4 may be 90 degrees, or may also be an obtuse angle, that is, the second support rod 622 inclines towards the direction departing from the first support rod 61, so as to utilize the inclined pulling force to strengthen the pulling force of the second support rod 622 on the first support rod 61 through the second inclined rod 631 and the second longitudinal beam 633. The third support bar 632 is disposed at an angle with respect to the rear chassis 5, for example, if the third support bar 632 is disposed at a position close to the first support bar 61, a mounting angle between the third support bar 632 and a portion of the rear chassis 5 close to the first support bar 61 may be an obtuse angle, so that the tensile force of the second longitudinal beam 633 on the first support bar 61 by the inclined third support bar 632 is strengthened, and the connection strength between the front chassis 4 and the rear chassis 5 is further strengthened. Of course, if the third supporting rod 632 is disposed at an end of the rear chassis 5 away from the first supporting rod 61, an included angle between the third supporting rod 632 and the rear chassis 5 may be 90 degrees, so that an included angle between the second supporting rod 622 and the front chassis 4 and an included angle between the third supporting rod 632 and the rear chassis 5 may be flexibly selected according to an actual location of a field, and is not limited herein.

In one embodiment of the present invention, the length of the second longitudinal beam 633 is less than or equal to the length of the rear chassis 5.

It should be noted that, by the length of the second longitudinal beam 633 being less than or equal to the length of the rear chassis 5, not only the length of the second longitudinal beam 633 is prevented from being too long, but also the length of the second longitudinal beam 633 is matched with the length of the rear chassis 5, so that it is convenient to provide a plurality of second oblique rods 631 or third support rods 632 between the second longitudinal beam 633 and the rear chassis 5, so as to correspondingly increase the tensile force on the rear chassis 5, and thus increase the connection strength between the front chassis 4 and the rear chassis 5.

In an embodiment of the present invention, the connection assembly further includes a beam structure 7, the number of the connection portions 6 is at least two, at least two connection portions 6 are oppositely disposed above the front chassis 4 and the rear chassis 5 at intervals, and the beam structure 7 is disposed between two adjacent connection portions 6 and is respectively connected to two adjacent connection portions 6.

It should be noted that, as shown in fig. 2, by setting the number of the connecting portions 6 to be at least two, and connecting two adjacent connecting portions 6 by the beam structure 7, it is possible to prevent the rear chassis 5 from bending and deforming downward by enhancing the connecting strength between at least two connecting portions 6, that is, enhancing the mechanical strength of the connecting assembly connecting the rear chassis 5 and the front chassis 4.

The cross beam structure 7 is vertically connected to the first longitudinal beam 623 or the second longitudinal beam 633, or may be connected at an acute angle, and the connection manner of the cross beam structure 7 that can connect two adjacent connecting portions 6 together is applicable to this technical solution, and is not particularly limited herein. If the number of connecting portion 6 is two, then two relative intervals of connecting portion 6 set up both ends around the top of preceding chassis 4 and rear chassis 5, if the number of connecting portion 6 is more than three, then adjacent two connecting portion 6 intervals set up, wherein two connecting portion 6 set up respectively in preceding chassis 4 and rear chassis 5 top both ends around, other connecting portion 6 can be installed according to actual conditions is nimble, for example can install in the top intermediate position of preceding chassis 4 and rear chassis 5. As shown in fig. 1, the Y-axis direction of the nacelle in the coordinate system is the front side of the nacelle, the Y-axis direction of the nacelle in the coordinate system is the rear side of the nacelle, the X-axis direction of the nacelle in the coordinate system is the right side of the nacelle, the X-axis direction of the nacelle in the coordinate system is the left side of the nacelle, the Z-axis direction of the nacelle in the coordinate system is the upper side of the nacelle, and the Z-axis direction of the nacelle in the coordinate system is the lower side of the nacelle.

In an embodiment of the present invention, the connection assembly further includes connection plates, the connection plates are disposed on the front chassis 4 and the rear chassis 5 and are respectively connected with the front chassis 4 and the rear chassis 5, and an area of the connection plates matches a sum of areas of the front chassis 4 and the rear chassis 5.

It should be noted that, by installing the connecting plates on the top ends of the front chassis 4 and the rear chassis 5, and connecting the connecting plates with the front chassis 4 and the rear chassis 5, respectively, the connecting strength of the front chassis 4 and the rear chassis 5 can be further enhanced by the connecting plates with a larger area. Wherein, the area of the connecting plate is matched with the sum of the areas of the front underframe 4 and the rear underframe 5, for example, the area of the front underframe 4 is equal to the area of the rear underframe 5 and the area of the connecting plate, or the area of the front underframe 4 and the area of the rear underframe 5 are slightly larger or slightly smaller than the area of the connecting plate, so that each position of the front underframe 4 and the rear underframe 5 is connected with the connecting plate to strengthen the mechanical strength of the engine room; the front underframe 4 and the rear underframe 5 can be fixedly connected with the connecting plate by welding, bolts and the like.

In one embodiment of the utility model, the nacelle further comprises a reinforcement structure 8, said reinforcement structure 8 being arranged on said rear undercarriage 5.

It should be noted that, by installing the reinforcing structure 8 on the rear chassis 5, the mechanical strength of the structure of the rear chassis 5 itself can be reinforced to prevent the rear chassis 5 from being deformed and bent downward. Wherein, the reinforcing structure 8 can be a reinforcing rib, a reinforcing plate, or other reinforcing structures. The reinforcing structure 8 may be disposed at the top end of the rear chassis 5, or at the bottom end of the rear chassis 5, so the specific location of the reinforcing structure 8 is not specifically limited herein.

Another embodiment of the utility model provides a wind turbine generator system comprising a nacelle as described in the previous embodiments.

It should be noted that, as shown in fig. 1, the wind turbine further includes a tower 9, a transformer 10, a transmission system 1, a generator system 2, and an electrical cabinet 3, wherein a front chassis 4 of the nacelle is disposed at an upper end of the tower 9, the transmission system 1 is disposed at an upper end of the front chassis 4, the generator system 2 and the electrical cabinet 3 are disposed at an upper end of the rear chassis 5, and the transformer 10 is suspended and mounted below the rear chassis 5 of the nacelle, for example, the transformer 10 may be connected to a suspension structure of the rear chassis 5 through a boom, a sling chain, a nacelle, or other structures, so as to achieve suspension and mounting below the rear chassis 5. The coupling assemblies are disposed above and coupled to the front chassis 4 and the rear chassis 5, respectively, to securely couple the front chassis 4 and the rear chassis 5, thereby preventing the rear chassis 5 from being bent and deformed downward due to an excessively long length, a heavy load, and the like.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.

Claims (10)

1. The utility model provides a cabin, includes preceding chassis (4) and back chassis (5), its characterized in that still includes coupling assembling and transformer (10), transformer (10) hang in the below of back chassis (5), coupling assembling set up in preceding chassis (4) with the top of back chassis (5) and respectively with preceding chassis (4) with back chassis (5) are connected.

2. Nacelle according to claim 1, wherein the bottom of the rear underframe (5) is provided with a plurality of suspension structures arranged at intervals, and the transformer (10) is connected to the suspension structures.

3. Nacelle according to claim 1, wherein the connection assembly comprises a connection portion (6), wherein the connection portion (6) comprises a first support bar (61), a first tie bar structure (62) and a second tie bar structure (63), wherein the first support bar (61) is arranged on the front frame (4) and/or the rear frame (5), wherein the first tie bar structure (62) is arranged on the front frame (4), wherein the second tie bar structure (63) is arranged on the rear frame (5), wherein an end of the first tie bar structure (62) facing away from the front frame (4) and an end of the second tie bar structure (63) facing away from the rear frame (5) are connected with the first support bar (61), respectively.

4. Nacelle according to claim 3, wherein the first tie structure (62) comprises a first diagonal (621) and the second tie structure (63) comprises a second diagonal (631), the first diagonal (621) being connected at the top and bottom with the first support bar (61) and the front underframe (4), respectively, and the second diagonal (631) being connected at the top and bottom with the first support bar (61) and the rear underframe (5), respectively.

5. Nacelle according to claim 4, wherein the first tie-rod arrangement (62) further comprises a second support rod (622) and a first longitudinal beam (623), the second tie-rod arrangement (63) further comprises a third support rod (632) and a second longitudinal beam (633), the second support rod (622) being arranged on the front underframe (4) and being connected to the bottom of the first diagonal rod (621), the first longitudinal beam (623) being arranged between the first support rod (61) and the second support rod (622); first bracing piece (61) with second diagonal pole (631) respectively with second longeron (633) are connected, third bracing piece (632) set up in on back chassis (5), second longeron (633) deviate from the one end of first bracing piece (61) with third bracing piece (632) deviate from the one end of back chassis (5) is connected.

6. Nacelle according to claim 5, wherein the length of the second longitudinal beams (633) is less than or equal to the length of the rear chassis (5).

7. Nacelle according to claim 3, wherein the connection assembly further comprises a cross-beam structure (7), wherein the number of the connection portions (6) is at least two, at least two of the connection portions (6) are arranged above the front underframe (4) and the rear underframe (5) in a relatively spaced manner, and the cross-beam structure (7) is arranged between two adjacent connection portions (6) and is respectively connected with two adjacent connection portions (6).

8. Nacelle according to claim 1, wherein the connection assembly further comprises connection plates arranged on the front chassis (4) and the rear chassis (5) and connected to the front chassis (4) and the rear chassis (5), respectively, the area of the connection plates matching the sum of the areas of the front chassis (4) and the rear chassis (5).

9. Nacelle according to claim 1, further comprising a reinforcement structure (8), said reinforcement structure (8) being provided on said rear underframe (5).

10. A wind park according to any of claims 1-9, comprising a nacelle.

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