CN206753830U - The engine room cover and wind power generating set of wind power generating set - Google Patents

Abstract

The utility model provides a nacelle cover of a wind power generator set and a wind power generator set. The nacelle cover of the wind power generator set includes: a first cover shell, the first cover shell has a first flange and a plurality of third flanges located on the first flange. a through hole; a second cover shell, the second cover shell has a second flange and a plurality of second through holes located on the second flange; a protrusion is provided on the first flange, and a protrusion is provided on the second flange. The limiting portion, the protruding portion and the limiting portion form-fit with each other when the first flange and the second flange are joined, so that the plurality of first through holes of the first flange and the corresponding plurality of first through holes of the second flange are formed. The second through holes are aligned with each other. One or more purposes of improving the assembly efficiency between the various covers of the nacelle cover, saving manpower and material resources, and reducing production costs can be achieved.

Description

Nacelles and wind turbines for wind turbines

technical field

The utility model relates to the technical field of wind power generation, in particular to a nacelle cover of a wind power generator set and a wind power generator set.

Background technique

As an integral part of the wind turbine, the nacelle cover plays the role of protecting the main engine, wind, rain, sand, lightning, ventilation and heat dissipation. In order to facilitate installation and transportation, the current nacelle cover is usually designed in pieces, and then transported as a whole or in pieces. A nacelle cover is usually divided into three or four pieces of shells, and with the continuous increase of the capacity of a single wind turbine, the size of the nacelle is getting larger and larger. For the needs of transportation, the nacelle cover may be divided into more parts. Multiple slices. The assembly form of each casing is to butt the flanges on every two adjacent casings, and then use bolts to fasten the butt-joined flanges.

When the flanges between the casings are butted, it is necessary to align the flanges of the two adjacent casings with the assistance of the spreader, so that the connection holes on the two flanges are aligned. However, when aligning flanges, it usually takes 4 or 5 assemblers to cooperate at the same time to complete the operation. Therefore, there is a problem of wasting resources such as manpower and material resources in the assembly process of the existing nacelle cover.

Therefore, need badly a kind of nacelle cover and wind power generating set of new wind generating set.

Utility model content

According to an embodiment of the present invention, a nacelle cover of a wind power generating set and a wind power generating set are provided, which can achieve one or more of improving the assembly efficiency between the casings of the nacelle cover, saving manpower and material resources, and reducing production costs. multiple purposes.

According to an aspect of an embodiment of the present invention, there is provided a nacelle cover for a wind power generating set, comprising: a first cover, the first cover has a first flange and a plurality of first passages on the first flange hole; the second casing, the second casing has a second flange and a plurality of second through holes on the second flange; the first flange is provided with a protrusion, and the second flange is provided with a limit When the first flange and the second flange are joined together, the protruding part and the limiting part are in shape fit with each other, so that the plurality of first through holes of the first flange and the corresponding plurality of first through holes of the second flange The two through holes are aligned with each other.

According to an aspect of the embodiment of the present utility model, the protruding part is continuously arranged on the first flange.

According to an aspect of the embodiment of the present invention, there are two or more protrusions, and the two or more protrusions are arranged on the first flange at intervals from each other.

According to an aspect of the embodiment of the present invention, the protruding part is arranged on the end surface of the first flange, the limiting part is a groove provided on the end surface of the second flange, and the protruding part can be accommodated in the groove .

According to an aspect of the embodiment of the present invention, the protruding part is close to the junction between the first flange and the first housing, and the outer surface of the protruding part is flush with the outer surface of the first housing.

According to an aspect of the embodiment of the present invention, the protruding part is arranged on the edge of the first flange, the limiting part is the side of the second flange, and the side can abut against the corresponding part of the protruding part.

According to an aspect of the embodiment of the present utility model, the nacelle cover of the wind power generating set further includes positioning pins, which are detachably connected to the first flange and the second flange, so that the plurality of first flanges of the first flange The through holes and the corresponding plurality of second through holes of the second flange are aligned with each other.

According to an aspect of the embodiment of the present invention, there are two or more positioning pins, and there is a predetermined distance between two adjacent positioning pins among the two or more positioning pins.

According to an aspect of the embodiment of the present invention, the positioning pin includes a pin body, a substrate fixedly connected to the pin body, a pressure plate with a third pin hole and a connecting piece, and the pin body penetrates into the first pin hole provided by the first flange, The corresponding second pin hole of the second flange and the third pin hole of the pressure plate connect the base plate and the pressure plate through the connecting piece, so that the base plate and the pressure plate press the first flange and the second flange.

According to another aspect of the embodiment of the present utility model, a wind power generating set is also provided, including the above-mentioned nacelle cover of the wind generating set.

To sum up, the nacelle cover of the wind turbine generator set and the wind turbine generator set according to the embodiment of the utility model are provided with protrusions and stoppers correspondingly at the flanges provided on the opposite edges of the two adjacent shells. , the positioning structure is formed through the shape fit between the protruding part and the limiting part, so that the two flanges can be aligned with each other without any external structure when the two casings are assembled. Therefore, when assembling the nacelle cover, rapid assembly of the nacelle of the wind power generating set can be realized without investing too much manpower and material resources. It can avoid the complicated operation process that requires simultaneous operation of multiple hoisting devices, shorten the assembly man-hours, thereby improving the overall assembly efficiency of the wind power generating set, and also saving the assembly cost of the wind generating set to a certain extent.

Description of drawings

Can understand the utility model better from the following in conjunction with accompanying drawing to the description of the specific embodiment of the utility model, wherein:

Other features, objects and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals represent the same or similar features.

Fig. 1 is a schematic cross-sectional structure diagram of a nacelle cover of a wind generating set according to an embodiment of the present invention;

Fig. 2 is the left view structural diagram of the nacelle formed by the nacelle cover of Fig. 1;

Fig. 3 is a schematic cross-sectional structural view of the junction of the first casing and the second casing of the nacelle cover in Fig. 1 and Fig. 2;

Fig. 4 is a structural exploded schematic view of the junction of the first casing and the second casing in Fig. 3;

Fig. 5 is a structural exploded schematic view of the junction of the first casing and the second casing according to another embodiment of the present invention;

Fig. 6 is a schematic cross-sectional structural view of the junction of the first casing and the second casing according to another embodiment of the present invention;

Fig. 7 is a three-dimensional structural schematic view of the junction of the first casing and the second casing according to an embodiment of the present invention;

FIG. 8 is an enlarged structural schematic diagram of part A in FIG. 7 .

in:

1 - engine room;

10-the first casing; 11-the first flange; 110-the first through hole; 111-the raised edge; 112-the raised edge; 113-the raised edge;

20-second casing; 21-second flange; 210-second through hole; 211-groove; 212-groove; 213-side;

30-the third casing; 31-the third flange;

40 - bolt assembly;

50-location pin; 51-base plate; 52-pin body; 53-press plate; 54-connector.

detailed description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. In the drawings and the following description, at least some of the well-known structures and techniques are not shown in order to avoid unnecessary obscurity of the present invention; and, for clarity, the size of some structures may be exaggerated. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the features, structures, or characteristics described hereinafter may be combined in any suitable manner in one or more embodiments.

The orientation words appearing in the following description are all the directions shown in the figure, and are not intended to limit the specific structure of the nacelle cover of the wind generating set of the present invention. In the description of the present utility model, it should also be noted that unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, Or integrally connected; can be directly connected or indirectly connected. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

The nacelle cover of the wind power generating set provided by the embodiment of the utility model includes shells connected to each other. According to different types of wind generating sets, the nacelle cover can be divided into multiple shells, and every two adjacent first shells and second The casings are connected to each other through flanges and bolt assemblies to form a nacelle, which is used to place important equipment such as the main engine. Since the alignment operation when connecting two adjacent casings of the nacelle cover of the wind power generating set provided by the embodiment of the utility model is simple and convenient, assembly man-hours can be saved, thereby improving the assembly efficiency of the wind generating set.

In order to better understand the utility model, the nacelle cover of the wind power generating set according to the embodiment of the utility model will be described in detail below with reference to FIGS. 1 to 8 .

Fig. 1 is a schematic cross-sectional structural view of a nacelle cover of a wind power generating set according to an embodiment of the present invention, Fig. 2 is a left view structural view of the nacelle 1 formed by the nacelle cover of Fig. A schematic cross-sectional structural view of the junction of the first cover 10 and the second cover 20 of the nacelle cover.

According to an embodiment of the present invention, the nacelle cover of the wind power generating set includes a first cover 10 and a second cover 20 . The first casing 10 has a first flange 11 and a plurality of first through holes 110 on the first flange 11 . The second housing 20 has a second flange 21 and a plurality of second through holes 210 on the second flange 21 . The first flange 11 is provided with a protruding portion, and the second flange 21 is provided with a limiting portion, and the protruding portion and the limiting portion are in shape fit with each other when the first flange 11 and the second flange 21 are engaged, so that The plurality of first through holes 110 of the first flange 11 and the corresponding plurality of second through holes 210 of the second flange 21 are aligned with each other.

Therefore, the nacelle cover of the wind power generating set according to the embodiment of the utility model is provided with corresponding protrusions and stoppers at the flanges provided on the opposite edges of two adjacent housings, through the protrusions and The position-limiting parts form a positioning structure in shape fit with each other, so that the two flanges can be aligned with each other without any external structure when assembling the two casings. Therefore, rapid assembly of the nacelle 1 of the wind generating set can be realized without investing too much manpower and material resources. It can avoid the complex operation process that requires multiple hoisting equipment to operate at the same time, shorten the assembly man-hours, thereby improving the overall assembly efficiency of the wind turbine, and also saving the assembly cost of the wind turbine to a certain extent, thereby improving wind power generation. Overall assembly efficiency of the unit. And by adopting the method of setting the positioning structure on the two casings themselves, the corresponding multiple through holes on the two flanges can be accurately aligned, so the overall assembly accuracy of the nacelle 1 can be effectively improved, and the through holes can be avoided from being connected to each other. The misalignment produces a large error, which makes it difficult to assemble the subsequent bolt assembly.

The description of the nacelle cover (hereinafter referred to as the nacelle cover) of the wind power generating set in the embodiment of the present invention including the first cover and the second cover does not only mean that the nacelle cover includes two covers, but refers to that the nacelle cover includes At least two casings also refers to including two types of casings, the two types of casings are respectively defined as a first casing and a second casing, and positioning structures are provided corresponding to each other at their joint locations. It can be understood that, in other embodiments, the nacelle cover may also include more shells.

The nacelle 1 is constituted by the nacelle cover of the wind power generating set, has a cavity, and the nacelle 1 is generally a hexahedral structure. Exemplarily, if the nacelle cover only includes two casings, then the nacelle 1 can adopt the method of dividing the overall structure into two parts and then joining them together, for example, the nacelle can be divided along the horizontal direction (according to the viewing angle of the drawing). The nacelle 1 is integrally divided into two casings, and the nacelle 1 can also be divided into two casings along the longitudinal direction of the nacelle 1 . And if the nacelle cover includes more casings, all side walls of the nacelle 1 can be separately arranged as split structures and then joined together, that is, each side wall of the nacelle 1 forms a separate casing. Alternatively, every two or three adjacent side walls are arranged as a casing, and then all the casings are spliced together. The following will describe different combinations of casings according to specific examples.

The nacelle 1 shown in FIG. 2 as a whole includes a bottom wall, two opposite side walls connected on both sides of the bottom wall, a top wall, a rear end wall and a front end wall (the front end wall shown in the figure has a circular opening). In this embodiment, all side walls of the nacelle 1 are formed into a three-part structure, that is, the nacelle 1 in FIG. Housing 30 (all directions are according to the viewing angle of the drawings). The second casing 20 and the third casing 30 are connected to each other to form the lower half of the cabin body of the nacelle 1. After the equipment in the nacelle 1 is installed, the first casing 10 can be covered on the lower half of the cabin body. , that is, the first casing 10 is connected to the second casing 20 and the third casing 30 respectively.

A first flange 11 extending vertically toward the interior of the nacelle 1 is formed at the edge of the first casing 10 , and a flange 11 is formed at the edge of the second casing 20 joining the first casing 10 and the third casing 30 toward the interior of the nacelle 1 . The second flange 21 extending vertically, the third flange 31 vertically extending toward the inside of the nacelle 1 is formed at the edge where the third casing 30 joins the first casing 10 and the second casing 20 . The first flange 11 is provided with a plurality of first through holes 110, the second flange 21 is provided with a plurality of second through holes 210 corresponding to the plurality of first through holes 110, and the third flange 31 Third through holes (not shown in the figure) respectively corresponding to the plurality of first through holes 110 and the plurality of second through holes 210 are provided. Thus, the first casing 10 , the second casing 20 and the third casing 30 can be connected by passing through the corresponding first through holes 110 , second through holes 210 and third through holes respectively by adopting multiple sets of bolt assemblies 40 . join each other.

In this embodiment, in order to distinguish, the shell connected to the first shell 10 and the second shell 20 is called the third shell, but it can be understood that the distinction is only in name. When the third casing 30 is connected to the first casing 10, the third casing 30 acts as the second casing, that is, the third casing 30 is connected with the first flange 11 of the first casing 10. Limiting parts are arranged on the three flanges 31 . When the third casing 30 is connected to the second casing 20, the third casing 30 is used as the first casing, that is, the third casing 30 is connected to the second flange 21 of the second casing 20. Protruding parts are arranged on the three flanges 31 . Of course, the embodiments of the present utility model do not limit the positions of the casings, and in other embodiments, the three casings can also exchange positions with each other. In the following, the connection between two adjacent casings in the nacelle casing will be described in detail mainly in terms of the connection form of the first casing 10 and the second casing 20 .

In order to improve the assembly efficiency of the first casing 10 and the second casing 20, a positioning structure is correspondingly provided at the junction of the first casing 10 and the second casing 20, that is, at the first A protruding portion is provided on the flange 11, and a limiting portion is correspondingly provided on the second flange 21 of the second casing 20. When the flange 11 and the second flange 21 are engaged, the plurality of first through holes 110 and the plurality of second through holes 210 are aligned with each other through the shape fit between the protruding portion and the limiting portion. Of course, the protruding part can be integrally formed on the first flange 11 , or can be fixedly connected to the first flange 11 in a separate form.

Fig. 4 is a structural exploded view of the junction of the first casing 10 and the second casing 20 in Fig. 3. In one embodiment, it can be seen from Fig. 3 and Fig. On the end surface of the flange 11 facing the second flange 21 , the limiting portion is a groove provided on the end surface of the second flange 21 facing the first flange 11 and capable of receiving the protrusion. In an optional embodiment, a clearance fit is adopted between the protrusion and the limiting part, so as to prevent the first casing from being affected by dimensional errors between the protrusion and the limiting part or burrs on the side of the end. 10 , the assembly accuracy between the second shell 20 and the third shell 30 , of course, the gap needs to be controlled within a certain range, so as to avoid affecting the alignment of the first flange 11 and the second flange 21 .

In this embodiment, specifically, the protruding portion is a flange 111 provided on the first flange 11 , and the limiting portion is a groove 211 provided on the second flange 21 capable of cooperating with the flange 111 . Exemplarily, the protruding edge 111 is disposed close to the joint position between the first flange 11 and the first housing 10 , and the outer surface of the protruding edge 111 is flush with the outer surface of the first housing 10 . The groove 211 is formed at the joint position of the second flange 21 and the second casing 20 and corresponds to the position of the flange 111. The groove 211 includes two walls arranged at right angles, so as to pass through the two walls respectively and the flange. Two adjacent and vertical wall surfaces of the edge 111 are abutted and fitted. Of course, in other embodiments, the wall where the protruding edge 111 and the groove 211 fit together may not be vertical. By arranging the flange 111 and the groove 211 on the side close to the first cover 10 and the second cover 20 respectively, it is convenient for the assembler to directly observe the docking condition of the first cover 10 and the second cover 20 outside the nacelle 1 , and reduce the manufacturing difficulty.

In an optional embodiment, the protrusions are continuously provided on the first flange 11 . Specifically, it can be seen from FIG. 2 that the first flange 11 arranged along the edge of the first casing 10 is roughly U-shaped, and the above-mentioned raised edge 111 is continuously arranged along the entire extension length of the first flange 11, so the raised edge 111 extends substantially in a U-shape along joints of the first casing 10 , the second casing 20 and the third casing 30 . Certainly, correspondingly, the groove 211 is provided continuously along the entire extension length of the second flange 21 and the third flange 31 , that is, the groove 211 extends substantially in a U-shape corresponding to the flange 111 . At this time, the protruding edge 111 and the groove 211 that cooperate with each other can form a substantially annular positioning structure along the junction of the first casing 10, the second casing 20, and the third casing 30 (here, the position formed in the nacelle 1 is ignored. circular opening in the front wall).

In addition, in some embodiments, there are two or more protruding parts, that is to say, the entire continuously extending protruding part can be arranged as a multi-stage interval structure, and the two or more protruding parts They are arranged at a distance from each other on the first flange 11 . Specifically, take the flange structure provided in the nacelle 1 in FIG. 2 as an example, that is, two or more flanges 111 are arranged at intervals along the extended length of the large U-shaped first flange 11, correspondingly The grooves 211 may be provided at intervals along the entire extension lengths of the second flange 21 of the second case 20 and the third flange 31 of the third case 30 . At this time, the two or more flanges 111 and grooves 211 that are arranged at intervals and cooperate with each other can still form a substantially annular shape along the joints of the first casing 10 , the second casing 20 and the third casing 30 . Positioning structure (the circular opening formed on the front end wall of the nacelle 1 is ignored here).

Of course, in this embodiment, when the second casing 20 and the third casing 30 are joined to each other, the third flange 31 where the third casing 30 and the second casing 20 are joined can be continuously connected in the above-mentioned manner. Provide flanges 111 or provide two or more flanges 111 at intervals, and correspondingly provide a flange capable of receiving the third flange 31 on the second flange 21 where the second casing 20 and the third casing 30 are joined. The groove 211 of the protruding edge 111 , so that the protruding edge 111 and the groove 211 that cooperate with each other extend approximately in an L shape along the junction of the second casing 20 and the third casing 30 .

In this way, protrusions and stoppers are provided continuously or at intervals at the junctions between the first case 10, the second case 20 and the third case 30, and the protrusions and the stoppers are in shape fit with each other. , so that the butt joint operation (also called joint piece) between the first casing 10, the second casing 20 and the third casing 30 can be completed at one time, without the need for the first flange 11, the second method The flange 21 and the third flange 31 are aligned with each other so that the positions of the casings are adjusted multiple times during the docking process. It can effectively save the assembly time of the nacelle cover, thereby improving the assembly efficiency of the entire wind power generating set, and can also save labor costs, thereby reducing production costs. And by setting the protruding part and the limit part, it can assist the first flange 11, the second flange 21 and the third flange 31 to be accurately positioned with each other, and then the first communication on the first flange 11 can be improved. The alignment between the hole 110, the second through hole 210 on the second flange 21 and the third through hole on the third flange 31 is to make the subsequent bolt assembly process more convenient and fast. At the same time, a labyrinth structure is formed between the adjacent flanges through the protrusions and the limiting portions, which can make the adjacent flanges have good sealing performance and further improve the sealing performance of the nacelle 1 .

When connecting the first casing 10, the second casing 20, and the third casing 30, for example, first, the second casing 20 needs to be hoisted to a designated position (ie, the lower left position shown in FIG. 2 ). , and then hoist the third casing 30 to a position aligned with the second casing 20 (that is, the lower right position shown in FIG. 2 ). Then an operator can be responsible for observing the cooperation between the second flange 21 and the third flange 31 , so that the groove 211 of the second flange 21 and the convex edge 111 of the third flange 31 can be fitted slowly. Finally, the second flange 21 and the third flange 31 corresponding to the second flange 21 are aligned with each other, that is, the plurality of second through holes 210 on the second flange 21 and the third flange 31 can be aligned with each other. A plurality of third through holes on the top are respectively aligned.

After the second casing 20 and the third casing 30 are assembled, the first casing 10 can be placed on the second casing 20 and the third casing 30 using lifting equipment, and then an operator can be responsible for Observe the cooperation between the first flange 11 and the second flange 21 or the first flange 11 and the third flange 31, make the flange 111 of the first flange 11 and the groove 211 of the second flange 21 And the flange 111 of the first flange 11 and the groove 211 of the third flange 31 are slowly fitted together, thereby connecting the first flange 11 and the second flange 21 and the first flange 11 and the third flange 31 to each other Positive. Finally, the plurality of first through holes 110 on the first flange 11 and the plurality of second through holes 210 on the second flange 21 and the plurality of first through holes 110 on the first flange 11 and the third method A plurality of third through holes on the flange 31 are respectively aligned.

In the above embodiment, the protruding part is the flange 111 provided on the first cover 10 , and the limiting part is a groove provided on the second cover 20 , but the embodiment of the present invention is not limited thereto. FIG. 5 is a schematic cross-sectional structural view of the junction of the first casing 10 and the second casing 20 according to another embodiment of the present invention. As shown in FIG. 5 , in some embodiments, the protruding portion is a rib 112 provided on the first flange 11 , and the limiting portion is a concave recess capable of cooperating with the rib 112 provided on the second flange 21 . Slot 212. Exemplarily, the rib 112 is disposed away from the joint position between the first flange 11 and the first casing 10, and the rib 112 needs to be as far away from the first through hole 110 and the second through hole 210 as possible to avoid affecting the bolts. The connection strength of the assembly 40. In this embodiment, the rib 112 is configured as a rib structure with a triangular cross section, and the groove 212 is configured as a groove structure corresponding to the rib 112 with a triangular cross section. Of course, the positioning structure composed of the convex rib 112 and the groove 212 in this embodiment has the same advantages as the positioning structure composed of the convex edge 111 and the groove 211 in the above-mentioned embodiment, so it is not repeated here.

FIG. 6 is a schematic cross-sectional structural view of the junction of the first casing 10 and the second casing 20 according to another embodiment of the present invention. As shown in FIG. 6 , in some embodiments, specifically, the protruding part is a flange 113 provided on the first flange 11 , and the limiting part is a flange 113 provided on the second flange 21 capable of contacting with the flange 113 Mating sides 213 . Exemplarily, the protruding edge 113 is disposed on an edge portion of the first flange 11 extending toward the interior of the nacelle 1 , so that the protruding edge 113 forms a bent structure at the end of the first flange 11 . The side 213 is the side of the end of the second flange 21 extending toward the interior of the nacelle 1 , and the side 213 can abut and fit with the side of the flange 113 facing the side of the first casing 10 . By arranging the convex edge 113 on the first flange 11 , the complex operation process of simultaneously performing error control on the two parts of the convex portion and the limiting portion can be avoided, and only the position of the convex edge 113 needs to be controlled. Therefore, while the first flange 11 and the second flange 21 can be assisted in precise positioning through the mutually form-fitting flange 113 and side surface 213, the positioning structure can also be simplified, that is, only the first flange 11 needs to be provided with a The protruding portion corresponding to the side surface 213 of the second flange 21 is enough. Therefore, the manufacturing cost can be further reduced.

Of course, in the above embodiments of the present utility model, there is no specific limitation on the setting positions of the protruding part and the limiting part. As long as the protruding part and the limiting part are arranged at the junction of two adjacent flanges and can It is only necessary to form fit with each other to assist two adjacent flanges to perform positioning engagement.

FIG. 7 is a schematic perspective view of the junction of the first housing 10 and the second housing 20 according to an embodiment of the present invention, and FIG. 8 is an enlarged structural diagram of part A in FIG. 7 . Please refer to FIG. 7 and FIG. 8 together. In one embodiment, in order to reduce the cumulative error when installing the bolt assembly 40 , the nacelle cover further includes a positioning pin 50 . The positioning pin 50 is detachably connected on the first flange 11 and the second flange 21, so that the plurality of first through holes 110 (not shown in the figure) of the first flange 11 and the second flange 21 The corresponding plurality of second through holes 210 (not shown in the figure) are aligned with each other.

Exemplarily, in one embodiment, the positioning pin 50 includes a base plate 51 , a pin body 52 , a pressing plate 53 and a connecting piece 54 . The first flange 11 is provided with a first pin hole corresponding to the pin body 52 , and the second flange 21 is provided with a second pin hole corresponding to the pin body 52 . The base plate 51 is a rectangular plate body. The cylindrical pin body 52 is fixed on the base plate 51 and protrudes vertically from one side of the base plate 51 . The pressing plate 53 is provided with a third pin hole corresponding to the size of the pin body 52 . Preferably, the end of the pin body 52 away from the base plate 51 is configured as a cone-shaped structure, so that the pin body 52 can be inserted into each pin hole quickly and accurately. Thus, the pin body 52 passes through the third pin hole, and the pressure plate 53 can be passed thereon, so that the pressure plate 53 can be opposed to the base plate 51 and a clamping space is formed between the base plate 51 and the pressure plate 53 . The connecting piece 54 can connect the base plate 51 and the pressing plate 53 together. In this embodiment, exemplarily, the connecting member 54 includes two groups of bolts and nuts that cooperate with each other.

Specifically, when connecting the first flange 11 and the second flange 21 through the positioning pin 50, the pin body 52 needs to pass through the first pin hole of the first flange 11 and the second pin hole of the second flange 21 in sequence. And the third pin hole on the pressure plate 53, and then pass through the base plate 51, the first flange 11, the second flange 21 and the two sets of connection holes correspondingly provided on the pressure plate 53 through two bolts and connect with two nuts. In order to securely connect the substrate 51 and the pressing plate 53 . And transition fit should be adopted between the pin body 52 and the pin hole on the flange, so that neither the pin body 52 will shake in the pin hole because the gap is too large between the pin body 52 and the pin hole wall of the flange, nor It is not difficult to insert the pin body 52 into the pin hole because the outer diameter of the pin body 52 is too large. Thus, the first flange 11 and the second flange 21 located therebetween can be pressed tightly by the base plate 51 and the pressing plate 53 .

In an optional embodiment, the nacelle cover may include two or more positioning pins 50, and the two or more positioning pins 50 are arranged at intervals between the first flange 11 and the second flange 21. at the junction. Preferably, there is a predetermined distance between every two adjacent positioning pins 50, and the predetermined distance is determined by the lengths of the first flange 11 and the second flange 21, so that each group of the first flange 11 and the second flange 21 engaged with each other A plurality of first through holes 110 and a plurality of second through holes 210 aligned on the two flanges 21 can be divided into a plurality of equal through hole groups by two or more positioning pins 50, that is to say, each The number of bolt assemblies 40 installed between two adjacent positioning pins 50 is equal.

Thus, by setting the positioning pin 50, the aligned first flange 11 and second flange 21 can be positioned before the bolt assembly 40 is assembled, and the first through hole 110 and the first through hole 110 on the first flange 11 can be maintained. The alignment accuracy of the second through hole 210 on the second flange 21 is so as to improve the installation efficiency of the subsequent bolt assembly 40 . And usually the material of the flange is fiberglass, so problems such as deformation and warpage are prone to occur at the joints of each other. And because the contact area between the base plate 51 of the locating pin 50 and the flange is much larger than that of the bolt, the locating pin 50 can effectively correct the deformation of the flange during the tightening process of the bolt assembly 40, avoiding the deformation of the flange and causing the first pass. The misalignment between the hole 110 and the second through hole 210 or the incomplete fit between the first flange 11 and the second flange 21 will affect the subsequent installation operation of the bolt assembly 40 . And when the nacelle cover is transported as a whole, only two or more positioning pins 50 are assembled, which can prevent the deformation of the flange of the nacelle cover during transportation and reduce the use of temporary bolts, thus simplifying the operation steps and avoiding A waste of resources.

And by arranging two or more positioning pins 50 at intervals at the junction of the first flange 11 and the second flange 21, the bolt assembly 40 installed between every two adjacent positioning pins 50 The number is equal, and the overall installation steps of the multiple sets of bolt assemblies 40 connected on the entire flange can be changed to: the step of installing multiple bolt assemblies 40 in sections (that is, between every two adjacent positioning pins 50, as seen It is a bolt assembly 40). Therefore, in the process of installing the bolt assembly 40, it is possible to avoid accumulative errors when installing a plurality of bolt assemblies 40 into the first through hole 110 and the second through hole 210 (that is, when the bolt assembly 40 is installed to the endmost When the flange joint position is used, the first through hole 110 on the first flange 11 and the second through hole 210 on the second flange 21 may be misaligned with each other), so that there is a relatively large gap at the flange joint position at the end. Large internal stress, and then there is a problem of greater safety hazards.

Exemplarily, as shown in FIG. 2 , in this embodiment, three positioning pins 50 are provided along the junction of the first flange 11 and the second flange 21 , through which a plurality of first communication pins 50 are arranged. The holes 110 and the second through holes 210 are divided into four groups, that is to say, all the bolt assemblies 40 installed on the first flange 11 and the second flange 21 need to be divided into four sections for sequential installation. The number of positioning pins 50 at other flange joints can be determined according to the length of the flange joints, as long as the cumulative error in the installation of the bolt assembly 40 can be reduced.

In the above embodiments, the positioning pin 50 includes one pin body 52 , but the embodiment of the present utility model is not limited thereto, and in other embodiments, more pin bodies 52 may be provided on the base plate 51 . Certainly, the distance between the multiple pin bodies 52 at this time needs to be set according to the distance between the pin holes on the flange. Correspondingly, a plurality of third pin holes corresponding to the pin bodies 52 need to be opened on the pressure plate 53 . In addition, the pin hole and the pin body 52 can also be set in other shapes correspondingly, for example, the pin body 52 can also be set as a square pin, a rhombus pin, etc., and the corresponding pin hole can be a square hole or a rhombus hole, etc. The installation methods of the positioning pins 50 at other flange joints are the same as the installation methods of the positioning pins 50 at the first flange 11 and the second flange 21 , so details are not repeated here.

According to an embodiment of the present invention, a wind power generating set (not shown in the figure) is also provided, and the wind generating set includes the nacelle cover of the wind generating set in any one of the above embodiments. Therefore, the wind power generating set has the same advantages as the nacelle cover, so it will not be repeated here.

The utility model can be realized in other specific forms without departing from its spirit and essential features. Therefore, the current embodiments are to be considered in all respects as illustrative rather than restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and falls within the meanings and equivalents of the claims All changes within the range are included in the scope of the present utility model. Moreover, different technical features in different embodiments can be combined to achieve beneficial effects. Those skilled in the art should be able to understand and implement other modified embodiments of the disclosed embodiments on the basis of studying the drawings, specification and claims.

Claims (10)

1. a kind of engine room cover of wind power generating set, including：

First case (10), first case (10) have first flange (11) and more in the first flange (11) Individual first through hole (110)；

Second case (20), second case (20) have second flange (21) and more in the second flange (21) Individual second through hole (210)；

It is characterized in that：

Protuberance is provided with the first flange (11), limiting section, the protuberance are provided with the second flange (21) When the first flange (11) engages with the second flange (21), form from one another coordinates with the limiting section, so that described the The multiple first through hole (110) of one flange (11) and corresponding the multiple second through hole of the second flange (21) (210) it is aligned with each other.

2. the engine room cover of wind power generating set according to claim 1, it is characterised in that the protuberance is continuously provided In the first flange (11).

3. the engine room cover of wind power generating set according to claim 1, it is characterised in that the protuberance is two or two More than individual, and two or more protuberances are arranged in the first flange (11) at each interval.

4. the engine room cover of wind power generating set according to any one of claim 1 to 3, it is characterised in that the protrusion Portion is arranged on the end face of the first flange (11), and the limiting section is to be arranged on the end face of the second flange (21) Groove (211,212), and the protuberance can be contained in the groove (211,212).

5. the engine room cover of wind power generating set according to claim 4, it is characterised in that the protuberance is close to described One flange (11) and the junction of first case (10), and the outer surface of the protuberance and first case (10) flush with outer surface.

6. the engine room cover of wind power generating set according to any one of claim 1 to 3, it is characterised in that the protrusion Portion is arranged on the edge of the first flange (11), and the limiting section is the side (213) of the second flange (21), and And the side (213) can be resisted against on the corresponding position of the protuberance.

7. the engine room cover of wind power generating set according to claim 1, it is characterised in that also including alignment pin (50), institute State alignment pin (50) to be detachably connected in the first flange (11) and the second flange (21), so that first method The blue the multiple first through hole (110) of (11) and corresponding the multiple second through hole of the second flange (21) (210) it is aligned with each other.

8. the engine room cover of wind power generating set according to claim 7, it is characterised in that the alignment pin (50) is two Or two or more, and between adjacent two alignment pin (50) in two or more alignment pins (50) It is spaced a predetermined distance from.

9. the engine room cover of wind power generating set according to claim 8, it is characterised in that the alignment pin (50) includes pin Body (52), the substrate (51) being fixedly connected with the shank (52), the pressing plate (53) and connector (54) with the 3rd pin-and-hole, The shank (52) penetrates the first pin-and-hole of the first flange (11) setting, corresponding second of the second flange (21) The 3rd pin-and-hole of pin-and-hole and the pressing plate (53), and by the connector (54) by the substrate (51) with it is described Pressing plate (53) links together, so that the substrate (51) and the pressing plate (53) compress the first flange (11) and described the Two flanges (21).

10. a kind of wind power generating set, it is characterised in that including wind-driven generator as claimed in any one of claims 1-9 wherein The engine room cover of group.