Filtering device, generator and wind turbine

Abstract

The embodiment of the application provides a filtering device, a generator and a wind generating set. The filtering device comprises a force bearing cover plate, a surrounding plate, a first filter screen structure, a second filter screen structure and a filter element; the force bearing cover plate and the surrounding plate enclose a containing space for filling the filter element, wherein the surrounding plate forms part of at least a side wall of the containing space; the first filter screen structure is arranged on the upper side of the filter element and is located on the lower side of the force bearing cover plate and substantially covers the upper side surface of the filter element; and the second filter screen structure is arranged on the lower side of the filter element and covers the lower side surface of the filter element. The embodiment of the application reduces the types of tools required during operation and maintenance, and reduces the burden of the operator; forms reliable and simple filtering at the cooling air inlet of the generator, guarantees the IP level of the interior of the generator, and is simple to operate and easy to maintain.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power, in particular, the present application relates to a filter device, a generator and a wind turbine generator. BACKGROUND

[0002] When the wind turbine generator is running, the rotor and stator of the generator will generate a large amount of heat. In order to avoid excessive heat accumulation from causing damage to the generator, the prior art usually adopts relatively economical air cooling to reduce or prevent dust particles in the air from entering the generator shell along with the wind and affecting the generator. The prior art also arranges a filter screen at the generator cooling air inlet of the generator shell, specifically, the filter screen is directly connected with the generator shell and covers the generator cooling air inlet, which has the defect of poor filtering performance.

[0003] In addition, with the large-scale of wind turbine generators, for example, the size of the cabin, generator and other equipment is getting larger and larger. In the operation and maintenance of the wind turbine generator, the operator often needs to use auxiliary climbing tools such as ladders to perform high-altitude work, which has the defects of a large number of operation and maintenance tools and heavy burden on the operator. SUMMARY

[0004] The present application aims at the shortcomings of the prior art and provides a filter device, a generator and a wind turbine generator to solve the technical problems of poor filtering performance of the filter structure of the generator cooling air inlet, high cost caused by using too many cast or stamped load-bearing structural parts, complex process of installing filter elements (filter cotton), a large number of operation and maintenance tools and heavy burden on the operator.

[0005] In a first aspect, the embodiments of the present application provide a filter device, which comprises a load-bearing cover plate, a surrounding plate, a first filter screen structure, a second filter screen structure and a filter element.

[0006] The load-bearing cover plate and the surrounding plate enclose a containing space for filling the filter element, wherein the surrounding plate forms part of at least the side wall of the containing space.

[0007] The first filter screen structure is arranged on the upper side of the filter element and is located on the lower side of the load-bearing cover plate, and substantially covers the upper side of the filter element.

[0008] The second filter screen structure is arranged on the lower side of the filter element and covers the lower side of the filter element.

[0009] And, the filter element mounting hole, the filter element pushing hole and the hollow part are arranged on the load-bearing cover plate, which not only ensures that the cover plate bears the load-bearing structural parts, but also maximizes the area of the cover plate and reduces the cost of manufacturing the load-bearing cover plate.

[0010] In a second aspect, the embodiments of the present application provide a generator, comprising a generator shell with a built-in rotor and stator, the generator shell having an air inlet for heat dissipation, and the filter device provided in the first aspect is arranged at the air inlet.

[0011] In a third aspect, the embodiments of the present application provide a wind turbine generator, comprising the filter device provided in the first aspect or the generator provided in the second aspect.

[0012] The technical scheme provided by the embodiments of the present application has the beneficial technical effects including:

[0013] 1. The force-bearing cover plate is adopted to provide a work area on the generator that can bear the operating personnel and related tools, the operating personnel can use the height of the generator to perform maintenance work, the types of tools required during maintenance are reduced, and the burden on the operating personnel is reduced.

[0014] 2. The rigidity of the force-bearing cover plate only needs to meet the bearing requirement, without the need to improve the rigidity of the entire generator shell, thereby reducing the cost.

[0015] 3. The filter structure with double-layer filter screen support and filter element is adopted to form reliable and simple filter structure at the cooling air inlet of the generator, to ensure the IP level of the interior of the generator, and the operation is simple and easy to maintain.

[0016] The additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description or be understood by those skilled in the art through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A top view of the first embodiment of the filter device provided by the embodiments of the present application;

[0019] Figure 2 A structure schematic view of the A-A sectional view of the first embodiment of the filter device provided by the embodiments of the present application; Figure 1

[0020] A structure schematic view of the A-A sectional view of the first embodiment of the filter device provided by the embodiments of the present application; Figure 3 Figure 1 A structure schematic view of the A-A sectional view of the first embodiment of the filter device provided by the embodiments of the present application;

[0021] Figure 4 A structure schematic view of the A-A sectional view of the first embodiment of the filter device provided by the embodiments of the present application; Figure 1

[0022] A top view of the second embodiment of the filter device provided by the embodiments of the present application; Figure 5 A top view of the second embodiment of the filter device provided by the embodiments of the present application;​

[0023] Figure 6 for Figure 5 an axial view of the force bearing cover plate;

[0024] Figure 7 for Figure 5 a B-B sectional view of the force bearing cover plate;

[0025] Figure 8 for Figure 5 a C-C sectional view of the force bearing cover plate;

[0026] Figure 9 a top view of the third embodiment of the filter device provided by the present application;

[0027] Figure 10 for Figure 9 a D-D sectional view of the force bearing cover plate;

[0028] Figure 11 for Figure 9 a partial sectional view of the E-E plane of the force bearing cover plate;

[0029] Figure 12 an axial view of the force bearing cover plate of the fourth embodiment of the filter device provided by the present application;

[0030] Figure 13 for Figure 1 a further schematic view of the A-A sectional view of the force bearing cover plate.

[0031] in the drawings:

[0032] 10 - force bearing cover plate; 10a - first mounting opening; 10b - filter core pushing hole; 10c - second mounting opening; 10d - hollow portion; 10e - filter mesh opening;

[0033] 11 - first cover plate; 12 - second cover plate;

[0034] 20 - surrounding plate; 20a - bent portion;

[0035] 21a - first inner bent edge; 22a - second inner bent edge; 23a - first sealing edge; 24a - second sealing edge;

[0036] 21b - first support plate; 22b - second support plate; 23b - first blocking plate; 24b - second blocking plate; 23b1 - bent edge;

[0037] 30 - first filter mesh structure; 40 - second filter mesh structure;

[0038] 50 - bottom plate;

[0039] 60 - filter core; 70 - containing space. DETAILED DESCRIPTION

[0040] The present application is described in detail below, examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar components or components having the same or similar functions throughout. In addition, if a detailed description of known technology is unnecessary for the features of the present application shown, it is omitted. The embodiments described below by reference to the accompanying drawings are exemplary and are for the purpose of explaining the present application only, and cannot be interpreted as a limitation on the present application.

[0041] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as such.

[0042] Those skilled in the art can understand that, unless otherwise stated, the singular forms "a", "an" and "the" used herein also include the plural forms. It should be further understood that the phrase "comprising" used in the specification of the present application means that the features and / or components are present, but does not exclude the presence or addition of one or more other features, components and / or their groups. The phrase "and / or" used herein includes all or any single unit and all combinations of the associated listed items.

[0043] First, in order to clearly, accurately introduce and explain the present application, and at the same time, facilitate the reader's understanding, the following definitions are defined in this paper: "side" in the direction perpendicular to the plane of the load cover plate, "end" in the direction parallel to the plane of the load cover plate; and the shape of the load cover plate is similar to that of the filter element as a whole, and is set as a cuboid, the long edge extension direction of the cuboid is the "length direction" in the present application, the second long edge extension direction of the cuboid is the "width direction" in the present application, and the minimum long edge extension direction of the cuboid is the "thickness direction" in the present application.

[0044] The present inventors have found that, in a wind turbine generator using air cooling, a generator shell is provided with a generator cooling air inlet, in order to reduce or prevent dust particles in the air from affecting the generator, a filter structure is used, which directly connects the filter screen with the generator shell and covers the generator cooling air inlet. However, this filter structure is relatively thin and has the defect of poor filtering performance.

[0045] In addition, with the large-scale of the wind turbine generator, the size of equipment such as the nacelle and the generator is larger and larger, and the structure or the number of the filter device is also larger and larger. The main force components of the filter device are basically formed by casting or stamping a thick steel plate. The large-area force steel plate or the large number of force steel plates make the cost of the filter device of the wind turbine generator too high. In the operation and maintenance work of the wind turbine generator, the operator often needs to use a climbing aid such as a ladder to perform high-altitude work. When the weight of the force component of the filter device is large, the existing filter element installation and removal are not convenient, and there are defects such as a large number of operation and maintenance tools and heavy burden on the operator. Although the generator of the wind turbine generator has a certain height, the rigidity of the engine housing and the filter screen is low, and cannot bear the operator and the related tools. The operator cannot perform the operation and maintenance work by using the height of the generator.

[0046] The filter device, the generator and the wind turbine generator provided by the present application aim to solve the above technical problems of the prior art.

[0047] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments.

[0048] The embodiment of the present application provides a filter device, which improves the structure of the force structure of the existing filter device and improves the structure of the filter element installation of the filter device, so that the filter device reduces the cost and facilitates the maintenance of the filter element on the basis of maintaining the original various force filtering performances.

[0049] A structural diagram of the filter device is shown in Figures 1-4 and includes a force cover plate 10, a surrounding plate 20, a first filter screen structure 30, a second filter screen structure 40 and a filter element 60.

[0050] The force cover plate 10 and the surrounding plate 20 enclose the containing space 70 for filling the filter element 60, wherein the surrounding plate 20 forms at least part of the side wall of the containing space 70.

[0051] The first filter screen structure 30 is arranged on the upper side of the filter element 60 and located on the lower side of the force cover plate 10, and basically covers the upper side of the filter element 60.

[0052] The second filter screen structure 40 is arranged on the lower side of the filter element 60 and covers the lower side of the filter element 60.

[0053] As shown in Figure 4 , the force cover plate 10 is a force structure component of the filter device and is a thick steel plate or cast iron structure. The force cover plate 10 is basically a square plate-shaped piece, covering the upper side of the filter element 60. The middle area can be provided with a filter element mounting hole, a large-area hollow part or the like, which can reduce the area of the force cover plate 10.

[0054] As shown in Figure 2 and Figure 3 , the force bearing cover plate 10 and the surrounding plate 20 form a containing space 70 for filling the filter core 60, the surrounding plate 20 mainly surrounds the force bearing cover plate 10 on four sides, and the structure can be provided as shown in Figure 2 , only including a side wall portion forming the containing space 70, or as shown in Figure 3 , a bending portion 20a is formed on the lower side of the surrounding plate 20, the bending portion 20a covers at least part of the lower side of the filter core 60 to form support for the lower side of the filter core 60. The upper side and the lower side of the filter core 60 are respectively provided with the first filter screen structure 30 and the second filter screen structure 40, which cover the upper and lower side areas of the filter core 60, and protect the exposed part of the filter core 60 corresponding to the hollow part 10d of the force bearing cover plate 10 and the exposed part of the lower side of the filter core 60 with certain rigidity.

[0055] In some possible embodiments, the first filter screen structure 30 is arranged on the force bearing cover plate 10, one side of the surrounding plate 20 is fixedly connected with the force bearing cover plate 10, the second filter screen structure 40 is fixedly connected with the other side of the surrounding plate 20, the filter core 60 is arranged in the containing space 70 formed by the force bearing cover plate 10, the first filter screen structure 30, the surrounding plate 20 and the second filter screen structure 40, and the filter core 60 matches at least one cross section of the heat dissipation flow channel perpendicular to the heat dissipation direction, and the heat dissipation flow channel passes through the containing space 70. The filter core 60 can fill at least one cross section of the heat dissipation flow channel to ensure the filtering function.

[0056] In some possible embodiments, the force bearing cover plate 10 can be connected with the force bearing beam of the generator.

[0057] In some possible embodiments, the filter core 60 includes filter cotton, filter paper or polyurethane filter core, etc. The filter core 60 adopts an existing rectangular structure with a certain thickness to fill the containing space 70 and filter the flowing fluid.

[0058] The filtering device provided by the above embodiments adopts the force bearing cover plate 10 to provide an operation area for carrying the operator and related tools on the generator, the operator can perform operation and maintenance by using the height of the generator, the types of tools required during operation and maintenance are reduced, and the burden of the operator is reduced. Moreover, only the rigidity of the force bearing cover plate 10 needs to meet the bearing requirement, and the rigidity of the entire generator shell does not need to be improved, thereby reducing the cost.

[0059] The filter device provided by the above embodiment adopts the double-layer filter screen support and the filter structure matched with the filter element 60 to form reliable and simple filter structure for the cooling air inlet of the generator, ensure the IP level of the generator (IP is the abbreviation of Ingress Protection, which is the ingress protection. The IP level is the protection level of the electrical equipment shell against foreign matter invasion, which is derived from the standard IEC 60529 of the International Electrotechnical Commission. This standard was also adopted as the American national standard in 2004), and is simple to operate and easy to maintain.

[0060] The inventor of the present application considers that the filter element 60 in the filter device is consumable and needs to be maintained or replaced regularly. Therefore, the present application provides the following possible implementation manner for the filter device:

[0061] The force-bearing cover plate 10 of the embodiment of the present application is provided with a mounting port through which the filter element 60 passes. The mounting port can facilitate the disassembly and assembly of the filter element 60 by the operator during the maintenance of the filter device.

[0062] On the basis of the above embodiment, the present application provides the following possible specific implementation manner for the filter device:

[0063] As shown in Figure 1 and Figure 4 , the filter element 60 is a flexible filter element 60; and the mounting port of the force-bearing cover plate 10 includes a first mounting port 10a extending along the length direction of the force-bearing cover plate 10.

[0064] In the embodiment, the first mounting port 10a can be a long strip-shaped hole extending along the length direction of the filter element 60, which facilitates the disassembly and assembly of the filter element 60 along the width direction of the force-bearing cover plate 10, and can also reduce the hollowed-out region 10d of the force-bearing cover plate 10, which is conducive to maintaining the strength of the force-bearing cover plate 10. The flexible filter element can well adapt to the disassembly and assembly of the first mounting port 10a.

[0065] In some possible embodiments, the first mounting port 10a is arranged at one end of the force-bearing cover plate 10 in the width direction. Specifically, during installation, one end of the flexible filter element is pushed into the accommodating space 70 of the filter device from the first mounting port 10a of the force-bearing cover plate 10, until the other end of the flexible filter element is also sent into the accommodating space 70 of the filter device, that is, the installation of the filter element 60 is completed.

[0066] In some possible embodiments, the first installation opening 10a is arranged at the middle of the width direction of the force bearing cover plate 10. During installation, one end of the flexible filter element is pushed into the end of the width direction of the accommodating space 70 of the filter device through the first installation opening 10a of the force bearing cover plate 10, and the other end of the flexible filter element is pushed into the other end of the width direction of the accommodating space 70 of the filter device through the first installation opening 10a of the force bearing cover plate 10, until the flexible filter element is completely sent into the accommodating space 70 of the filter device, that is, the installation of the filter element 60 is completed. During the pushing process, one end of the flexible filter element can be pushed first until it reaches the target position (for example, the end of the end of the accommodating space 70), and then the other end of the flexible filter element is pushed; or both ends of the flexible filter element can be pushed at the same time until the flexible filter element is completely sent into the accommodating space 70 of the filter device.

[0067] In some possible embodiments, the size of the first installation opening 10a is slightly smaller than the cross-sectional size of the filter element 60 perpendicular to the installation direction, and the filter element 60 can be slightly compressed during installation. After installation is completed, the filter element 60 returns to its original size. In this way, the first installation opening 10a can lock the filter element 60.

[0068] In some possible embodiments, as shown in Figure 4 The force bearing cover plate 10 further includes two hollow parts 10d, and the first installation opening 10a is arranged between the two hollow parts 10d. Specifically, the first installation opening 10a is arranged at the middle region of the force bearing cover plate 10, and the force bearing cover plate 10 on both sides of the first installation opening 10a is provided with a hollow part 10d with a large area. The hollow part 10d can be a long strip hole structure extending along the length direction of the filter element 60, and the width size of the hollow part 10d is greater than the width size of the first installation opening 10a. The two hollow parts 10d can also be arranged to be axisymmetric with respect to the first installation opening 10a, so that the filter element 60 can be pushed into and detached from the accommodating space 70 with small deformation.

[0069] Optionally, the first filter screen structure 30 includes two component parts, which are respectively arranged corresponding to the hollow parts 10d and cover the upper side of the filter element 60. That is, corresponding to the arrangement of the first installation opening 10a, the first filter screen structure 30 can be arranged in the form of two first filter screens 30 adapted to the two hollow parts 10d, and the two first filter screens 30 respectively cover the hollow parts 10d and leave a space corresponding to the first installation opening 10a, as shown in Figure 2 and Figure 3 The arrangement facilitates the insertion of the filter element 60 into the first installation opening 10a to enter the accommodating space 70. Such an arrangement facilitates the disassembly and assembly of the filter element 60, and can also reduce the hollow part 10d area of the force bearing cover plate 10, which is beneficial to maintaining the strength of the force bearing cover plate 10.

[0070] On the basis of the above embodiments, the present application provides another possible specific implementation manner for the filter device:

[0071] As shown in Figure 5 and Figure 6 , the filter element 60 is a flexible filter element 60; the mounting port of the force bearing cover plate includes a first mounting port 10a extending along the width direction of the force bearing cover plate 10 and located at one end of the force bearing cover plate 10, and the mounting port of the force bearing cover plate 10 further includes a filter element pushing hole 10b extending along the length direction of the force bearing cover plate 10.

[0072] When the filter device is large in size, the dismounting and mounting process of the filter element 60 will have a long stroke, especially when the first mounting port 10a is arranged at one end of the length direction of the force bearing cover plate 10, the dismounting and mounting stroke of the filter element 60 is longer. The filter element pushing hole 10b increases the force point on the force bearing cover plate 10 for pushing the filter element 60, and the filter element pushing hole 10b is located at the side of the filter element pushing direction of the first mounting port 10a, so that the operator can use the filter element pushing hole 10b and the first mounting port 10a in cooperation to make the mounting and dismounting of the filter element 60 more easy and smooth.

[0073] During the mounting process of the filter element 60, the operator can push the filter element 60 part near the first mounting port 10a on the force bearing cover plate 10 and the filter element 60 part already in the filter element pushing hole 10b on the force bearing cover plate 10 in cooperation, so that the mounting of the filter element 60 is more easy, and the wrinkling of the flexible filter element in the containing space 70 of the filter device can be reduced.

[0074] During the dismounting process of the filter element 60, the filter element 60 part at the filter element pushing hole 10b can be pushed reversely through the filter element pushing hole 10b, so that the filter element 60 completely in the containing space 70 of the filter device can be moved out of the first mounting port 10a on the force bearing cover plate 10 or moved out partially, and then the operator can apply force to the filter element 60 moved out of the first mounting port 10a on the force bearing cover plate 10, so that the dismounting of the filter element 60 can be completed.

[0075] The filter element pushing hole 10b can be arranged according to the relative position of the first mounting port 10a and the containing space 70 of the filter device. For example, if the first mounting port 10a is close to one end of the containing space 70 of the filter device, the filter element pushing hole 10b is located on the force bearing cover plate 10 between the first mounting port 10a and the other end of the containing space 70 of the filter device; if the first mounting port 10a is located between the two ends of the containing space 70 of the filter device, the filter element pushing hole 10b is arranged on the force bearing cover plate 10 between the first mounting port 10a and one end of the containing space 70 of the filter device, and between the first mounting port 10a and the other end of the containing space 70 of the filter device, so as to facilitate the pushing of the flexible filter element in different directions.

[0076] In some possible embodiments, the filter element push-fit hole 10b can be a regular shape such as a circle, a square, a triangle, etc., or can be other irregular shapes.

[0077] In some possible embodiments, the filter element push-fit hole 10b can be arranged substantially perpendicular to the first mounting port 10a, covering a major part of the length direction of the load-bearing cover plate 10, and the filter element push-fit hole 10b can be a long strip-shaped hole extending along the length direction of the filter element 60. On the one hand, this can increase the push-fit stroke of the filter element push-fit hole 10b, so that the filter element 60 is subjected to more balanced push force, and the flexible filter element is more evenly spread in the accommodating space 70 of the filter device; on the other hand, this can save the opening area of the load-bearing cover plate 10, and reduce the loss of rigidity of the load-bearing cover plate 10. In addition, arranging the first mounting port 10a of the filter element 60 at one end of the load-bearing cover plate 10 can further reduce the area of the load-bearing cover plate 10, balance the load-bearing part of the load-bearing cover plate 10, and not affect the function of the load-bearing structure of the load-bearing cover plate 10.

[0078] In some possible embodiments, as shown in Figure 6 The load-bearing cover plate 10 further includes two hollow parts 10d, and the filter element push-fit hole 10b is located between the two hollow parts 10d. Specifically, the filter element push-fit hole 10b can be arranged in the middle region of the load-bearing cover plate 10, and large-area hollow parts 10d are arranged on both sides of the filter element push-fit hole 10b. The hollow parts 10d are also long strip-shaped hole structures extending along the length direction of the filter element 60, and the width dimension of the hollow part 10d is greater than the width dimension of the filter element push-fit hole 10b. The two hollow parts 10d can also be arranged to be axisymmetric with respect to the filter element push-fit hole 10b. The length of the filter element push-fit hole 10b is less than the length of the hollow part 10d, or both ends thereof can be shorter than the ends of the hollow part 10d, so as to facilitate the push-fitting of the filter element 60 to the entire length direction.

[0079] In some possible embodiments, the first filter screen structure 30 includes two component parts corresponding to the hollow parts 10d and covering the upper side of the filter element 60. That is, corresponding to the arrangement of the filter element push-fit hole 10b, the first filter screen structure 30 can be arranged in the form of two first filter screens 30 adapted to the two hollow parts 10d, and the two first filter screen structures 30 respectively cover the hollow parts 10d and leave a space corresponding to the first mounting port 10a, as shown in Figure 7 Such arrangement facilitates the disassembly and assembly of the filter element 60, and can also reduce the hollow part 10d area of the load-bearing cover plate 10, which is conducive to maintaining the strength of the load-bearing cover plate 10.

[0080] The inventors of the present application consider that the surrounding plate 20 in the filter device can provide certain support for the second filter screen structure 40. Therefore, the present application provides the following possible implementation manner for the filter device:

[0081] As shown in Figure 3 The enclosure 20 of the present embodiment comprises a bent portion 20a.

[0082] The bent portion 20a is located at the lower side of the enclosure 20 and covers at least part of the lower side of the filter element 60.

[0083] Alternatively, the bent portion 20a is located at the upper side of the enclosure 20 and is bent outward to connect with the force-bearing cover plate 10 and the first filter mesh structure 30.

[0084] In some possible embodiments, the second filter mesh structure 40 is fixed to the side of the bent portion 20a close to the force-bearing cover plate 10, and the bent portion 20a can provide support for the second filter mesh structure 40, reducing the requirement for the strength of the fixed connection between the second filter mesh structure 40 and the enclosure 20.

[0085] In some possible embodiments, the second filter mesh structure 40 is fixed to the opening surface of the bent portion 20a, so that the second filter mesh structure 40 and the bent portion 20a of the enclosure 20 easily form a complete surface, facilitating the placement of the filter element 60.

[0086] In some possible embodiments, the second filter mesh structure 40 is fixed to the side of the bent portion 20a away from the force-bearing cover plate 10, so that the contact surface between the second filter mesh structure 40 and the enclosure 20 is larger and easier to connect, for example, the fixed connection can be achieved by using glue. Since the second filter mesh structure 40 is connected to the outer side of the enclosure 20, the assembly precision requirement between the second filter mesh structure 40 and the enclosure 20 is low, the construction is simpler, and the matching precision requirement between the size of the second filter mesh structure 40 and the size of the enclosure 20 can be reduced, thereby reducing the manufacturing cost.

[0087] In some possible embodiments, the enclosure 20 can form a bent portion 20a at both ends of the side away from the force-bearing cover plate 10 to cover part of the lower side of the filter element 60. The end portion without the bent portion 20a can form a channel for installing the second filter mesh structure 40. Alternatively, the enclosure 20 can form a bent portion 20a around the side away from the force-bearing cover plate 10.

[0088] In some possible embodiments, the force-bearing cover plate 10 comprises a hollow portion 10d, and the force-bearing cover plate 10 is bent downward and then bent again at the outer side edge of the hollow portion 10d to form part of the side wall of the accommodating space 70 and cover part of the lower side of the filter element 60.

[0089] In the present embodiment, as shown in Figure 4As shown, the part of the hollowed part 10d formed by the force bearing cover plate 10, at least one of the two outer edges in the length direction can be directly bent downward to form the part of the length direction of the surrounding plate 20 of the accommodating space 70, and then bent again to form the bent part 20a supporting the filter element 60 and the second filter screen structure 40. In this way, part of the surrounding plate 20 can be integrally formed with the force bearing cover plate 10, thereby increasing the overall force bearing performance of the filter device.

[0090] Optionally, the two ends of the force bearing cover plate 10 in the length direction can be provided as slightly inclined mounting parts, and the mounting structure for mounting the filter device to the flow passage opening can be provided on the mounting parts, for example, in the form of an opening structure.

[0091] In some possible embodiments, as shown in Figure 7 and Figure 8 As shown, the part of the four at least side walls of the surrounding plate 20 forming the accommodating space, the upper edge includes four bent parts supporting the force bearing cover plate 10, and the lower edge of at least two side edges includes bent parts supporting the second filter screen structure 40 and the filter element 60. Specifically, the surrounding plate 20 includes a first inner bent edge 21a, a second inner bent edge 22a, a first sealing edge 23a, and a second sealing edge 24a; the first inner bent edge 21a and the second inner bent edge 22a are respectively bent downward from the outer opposite edges of the hollowed part 10d of the force bearing cover plate 10 and bent again; the two ends of the first sealing edge 23a are respectively connected to one end of the first inner bent edge 21a and the second inner bent edge 22a, and the two ends of the second sealing edge 24a are respectively connected to the other end of the first inner bent edge 21a and the second inner bent edge 22a. Thus, the surrounding plate 20 can be integrally formed to provide a certain rigidity of the thickness direction of the accommodating space 70.

[0092] In the present embodiment, the first inner bent edge 21a and the second inner bent edge 22a can be formed by cutting and then bending at the hollowed part 10d of the force bearing cover plate 10, that is, the first inner bent edge 21a and the second inner bent edge 22a are part of the force bearing cover plate 10, which can reduce material waste, and the first inner bent edge 21a and the second inner bent edge 22a also have the same strength as the force bearing cover plate 10. The first sealing edge 23a and the second sealing edge 24a are used to close the openings at the two ends of the first inner bent edge 21a and the second inner bent edge 22a, so that the first inner bent edge 21a, the second inner bent edge 22a, the first sealing edge 23a, and the second sealing edge 24a, together with the force bearing cover plate 10, the first filter screen structure 30 and the second filter screen structure 40 on the force bearing cover plate 10, can surround the accommodating space 70 for accommodating the filter element 60.

[0093] The inventors of the present application consider that, in the case of a large filter device for example, the force bearing cover plate 10 does not need to be the same size as the overall size of the filter device, and if the force bearing cover plate 10 is optimized, cost reduction can be achieved. Therefore, the present application provides the following possible implementation for the filter device:

[0094] As shown in the drawings, the force bearing cover plate 10 of the embodiment of the present application comprises a first cover plate 11 and a second cover plate 12. Figure 9

[0095] The first cover plate 11 and the second cover plate 12 are respectively located at two ends of the length direction of the filter element 60 and below the lower side of the filter element 60.

[0096] In the embodiment, the force bearing cover plate 10 adopts a split structure, and the first cover plate 11 and the second cover plate 12 can be arranged at the required positions of the generator.

[0097] The second cover plate 12 is arranged at the required position of the generator to provide a work area that can bear the operator and related tools, that is, the force bearing cover plate 10 only covers the work area, and the material cost of the force bearing cover plate 10 can be saved.

[0098] On the basis of the above embodiment, the present application provides the following possible specific implementation mode for the filter device:

[0099] As shown in the drawings, the force bearing cover plate 10 of the embodiment of the present application comprises a first cover plate 11 and a second cover plate 12. Figure 9 Figure 10 As shown in the drawings, the force bearing cover plate 10 of the embodiment of the present application comprises a first cover plate 11 and a second cover plate 12.

[0100] The cross section of the first support plate 21b and the second support plate 22b along the length direction of the filter element 60 forms a C shape, and the first baffle plate 23b and the second baffle plate 24b partially cover the upper side of the filter element 60.

[0101] In the embodiment, the first cover plate 11 and the second cover plate 12 are respectively located at two ends of the length direction of the containing space 70. The first support plate 21b and the second support plate 22b extend along the length direction of the containing space 70, the first baffle plate 23b and the second baffle plate 24b are located at two ends of the length direction of the containing space 70 and are respectively connected to the first support plate 21b and the second support plate 22b.

[0102] The cross section of the first support plate 21b and the second support plate 22b along the axial direction of the containing space 70 is C-shaped, that is, the surrounding plate 20 comprises a bending portion that at least partially covers the upper side and the lower side of the filter element 60. The first support plate 21b and the second support plate 22b are oppositely arranged. At this time, the containing space 70 is mainly formed by the surrounding plate 20, and the force bearing cover plate 10 is arranged at the bottom of the containing space 70 to support the surrounding plate 20. The exposed part of the upper side of the filter element 60 is covered and protected by the first filter screen structure 30, and the exposed part of the lower side of the filter element 60 is covered and protected by the second filter screen structure 40.

[0103] As shown in the drawings, the force bearing cover plate 10 of the embodiment of the present application comprises a first cover plate 11 and a second cover plate 12. Figure 10 ​​As shown, the first supporting plate 21b and the second supporting plate 22b are C-shaped in the axial cross section of the accommodating space 70, which can increase the connection area of the two supporting plates with the corresponding cover plates and the baffle plates on both sides, thereby improving the stability of the connection; on the other hand, it can provide certain support or constraint for the first filter screen structure 30, the second filter screen structure 40 or the filter element 60.

[0104] The first cover plate 11 and the second cover plate 12 are respectively fixedly connected to both ends of the same side of the first supporting plate 21b and the second supporting plate 22b, and are located below the first supporting plate 21b and the second supporting plate 22b, thereby supporting the first supporting plate 21b and the second supporting plate 22b.

[0105] The first baffle plate 23b and the second baffle plate 24b are respectively fixedly connected to both ends of the other side of the first supporting plate 21b and the second supporting plate 22b, and are generally bent, and respectively partially cover the side wall surface and the upper side surface of the filter element 60. The first baffle plate 23b and the second baffle plate 24b can form new mounting openings for mounting the filter element 60 between the first cover plate 11 and the second cover plate 12, which will be described in detail below.

[0106] In some possible embodiments, as shown in FIG. 1, the first baffle plate 23b and / or the second baffle plate 24b have a bent edge 23b1 bent towards the first cover plate 11, and the bent edge 23b1 and the corresponding cover plate form a second mounting opening 10c of the filter element 60. Figure 11

[0107] In the embodiment, the second mounting opening 10c is formed between the first baffle plate 23b and the first cover plate 11, which can be used for dismounting the filter element 60 into the accommodating space 70 of the filter device, and the bent edge 23b1 of the first baffle plate 23b bent towards the first cover plate 11 can form a certain one-way constraint on the second mounting opening 10c, specifically: the filter element 60 can be pushed into the accommodating space 70 of the filter device from the second mounting opening 10c, and after the filter element 60 completely enters the accommodating space 70, the bent edge 23b1 on the first cover plate 11 will prevent the filter element 60 from sliding out, thereby realizing the constraint of the filter element 60 and preventing the filter element 60 from sliding out of the filter device.

[0108] The third mounting opening is formed between the second baffle plate 24b and the second cover plate 12, and the bent edge on the second cover plate 12 has the same functions and advantages as described above, and will not be described here.

[0109] The inventors of the present application consider that the first filter screen structure 30 arranged on the force-bearing cover plate 10 can adopt different implementation structures according to different use requirements. Therefore, the present application provides the following possible implementation manner for the filter device:

[0110] As shown in FIG. 1, the first filter screen structure 30 is arranged on the first cover plate 11. Figure 12 ​As shown, the load-bearing cover plate 10 of this application embodiment includes a plurality of filter screen openings 10e, and the portion of the load-bearing cover plate 10 having a plurality of filter screen openings 10e forms a first filter screen structure 30.

[0111] In this embodiment, a plurality of filter screen openings 10e are directly machined on the load-bearing cover plate 10, for example by stamping, to form a first filter screen structure 30. This first filter screen structure 30 has high strength, and the filter screen area can also support operators and related tools, thus increasing the working area available to the operator. At the same time, it can reduce the number of assembly parts of the filter device, simplifying the structure of the filter device.

[0112] In some possible embodiments, the first filter structure 30 is a mesh filter that matches the perforated portion 10d of the load-bearing cover 10 and is disposed at the perforated portion 10d of the load-bearing cover 10, protecting the filter element 60 exposed at the perforated portion 10d. The first filter structure 30 can be formed by combining multiple small filter structures, each disposed at one of the multiple perforated portions 10d of the load-bearing cover 10. The perforated portions 10d on the load-bearing cover 10 are used for ventilation, and using a filter in the first filter structure 30 can reduce costs. Optionally, the filter can be a woven filter or a welded filter.

[0113] In some possible embodiments, the second filter structure 40 still adopts a structure such as wire mesh, woven filter, or welded filter, which is much cheaper than the perforated structure, thereby reducing the cost of the filtration device.

[0114] The inventors of this application considered that, in the aforementioned embodiments, the second filter structure 40 is connected to the surrounding plate 20. If the rigidity of the second filter structure 40 is poor, it may affect the overall stability of the filtering device. Therefore, this application provides the following possible implementation of the filtering device:

[0115] like Figure 13 As shown, the filtration device in this embodiment of the application further includes a base plate 50, which is disposed below the lower side of the filter element 60 and located outside the second filter structure 40.

[0116] In this embodiment, the base plate 50 is fixedly connected to one side of the second filter screen structure 40 of the surrounding plate 20, and is disposed below the second filter screen structure 40, that is, the side of the second filter screen structure 40 away from the load-bearing cover plate 10 contacts the base plate 50. The base plate 50 can be configured in various structural forms without affecting fluid flow, such as including perforated portions, filter screen openings, etc., and the base plate 50 can provide more support for the second filter screen structure 40, which helps to enhance the overall stability of the filtration device.

[0117] In some possible embodiments, the second filter screen structure 40 can be fixedly connected with the bottom plate 50, or the second filter screen structure 40 can be simply placed on the bottom plate 50.

[0118] Based on the same inventive concept, the embodiment of the present application provides a generator, which comprises a generator shell with an embedded rotor and stator, and the generator shell has an air inlet for heat dissipation, and the filter device in any of the above embodiments is arranged at the air inlet.

[0119] The generator provided by the embodiment realizes heat dissipation through the air inlet of the generator shell, and the filter device provided by the present application is arranged at the air inlet, and the filter structure of the double-layer filter screen cooperates with the filter element 60 to enhance the filtering performance in the air cooling process, so that the internal environment of the generator is cleaner.

[0120] The force-bearing cover plate 10 in the filter device provides a work area on the generator that can bear the operating personnel and related tools, the operating personnel can perform operation and maintenance work by using the height of the generator, the types of tools required during operation and maintenance are reduced, and the burden of the operating personnel is reduced. Moreover, only the rigidity of the force-bearing cover plate 10 needs to meet the bearing requirement, and the rigidity of the entire generator shell does not need to be improved, thereby reducing the cost.

[0121] In some embodiments, the force-bearing cover plate 10 of the filter device is connected with the force-bearing beam of the generator.

[0122] Based on the same inventive concept, the wind turbine generator provided by the embodiment of the present application comprises the filter device in any of the above embodiments, or the generator provided by any of the above embodiments.

[0123] By applying the embodiment of the present application, the following beneficial effects can be achieved at least:

[0124] 1. The filter device provided by the embodiment provides a work area on the generator that can bear the operating personnel and related tools by using the force-bearing cover plate 10, the operating personnel can perform operation and maintenance work by using the height of the generator, the types of tools required during operation and maintenance are reduced, and the burden of the operating personnel is reduced. Moreover, only the rigidity of the force-bearing cover plate 10 needs to meet the bearing requirement, and the rigidity of the entire generator shell does not need to be improved, thereby reducing the cost.

[0125] 2. The filter device provided by the embodiment uses the double-layer filter screen support to cooperate with the filter structure of the filter element 60 to form reliable and simple filtering at the air inlet for cooling of the generator, ensures the IP level of the internal environment of the generator, and is easy to operate and maintain.

[0126] 3. The filter element 60 is a flexible filter element, and the force-bearing cover plate 10 has a first mounting port 10a. The first mounting port 10a facilitates disassembly and assembly of the filter element 60. The flexible filter element can well adapt to the disassembly and assembly of the first mounting port 10a.

[0127] 4. The force bearing cover plate 10 further has a filter core pushing hole 10b. The filter core pushing hole 10b increases the force point on the force bearing cover plate 10 for pushing the filter core 60, and the filter core pushing hole 10b is located on the side of the filter core pushing direction of the first mounting port 10a. The operator can use the filter core pushing hole 10b and the first mounting port 10a to work together to make the installation and removal of the filter core 60 more easy and smooth.

[0128] 5. The filter core pushing hole 10b adopts a long hole structure, and the length direction of the long hole is parallel or approximately parallel to the filter core pushing direction. On the one hand, it can increase the pushing stroke of the filter core pushing hole 10b, so that the pushing force on the filter core 60 is more balanced, and the flexible filter core can be more stretched in the containing space 70 of the filter device. On the other hand, it can save the opening area on the force bearing cover plate 10 and reduce the loss of rigidity of the force bearing cover plate 10.

[0129] 6. The surrounding plate 20 can include a first inner bent edge 21a, a second inner bent edge 22a, a first sealing edge 23a and a second sealing edge 24a. The first inner bent edge 21a and the second inner bent edge 22a can be formed by cutting and then bending at the hollow part 10d of the force bearing cover plate 10, that is, the first inner bent edge 21a and the second inner bent edge 22a are part of the force bearing cover plate 10, which can reduce material waste, and the first inner bent edge 21a and the second inner bent edge 22a also have the same strength as the force bearing cover plate 10. The first sealing edge 23a and the second sealing edge 24a are used to close the openings at both ends of the first inner bent edge 21a and the second inner bent edge 22a, so that the first inner bent edge 21a, the second inner bent edge 22a, the first sealing edge 23a and the second sealing edge 24a, together with the force bearing cover plate 10, the first filter screen structure 30 and the second filter screen structure 40 on the force bearing cover plate 10, can form a containing space 70 for accommodating the filter core 60.

[0130] 7. The force bearing cover plate 10 can include a first cover plate 11 and a second cover plate 12; the surrounding plate 20 can include a first supporting plate 21b, a second supporting plate 22b, a first blocking plate 23b and a second blocking plate 24b. In this embodiment, the force bearing cover plate 10 adopts a split structure, and the first cover plate 11 and the second cover plate 12 can be arranged at the required position of the generator to provide a work area that can bear the operator and related tools, that is, the force bearing cover plate 10 only covers the work area, which can save the material cost of the force bearing cover plate 10. The cross section of the first supporting plate 21b and the second supporting plate 22b along the axis of the containing space 70 is C-shaped, which on the one hand can increase the connection area of the two supporting plates with the corresponding cover plates and blocking plates on both sides, and on the other hand can provide certain support or constraint for the first filter screen structure 30, or the second filter screen structure 40, or the filter core 60.

[0131] 8. A second mounting port 10c is formed between the first baffle 23b and the first cover plate 11, which can be used to install or remove the filter element 60 into the receiving space 70 of the filter device. The bent edge 23b1 on the first baffle 23b that bends towards the first cover plate 11 can form a certain unidirectional constraint on the second mounting port 10c. Specifically, the filter element 60 can be pushed into the receiving space 70 of the filter device through the second mounting port 10c. After the filter element 60 is fully inserted into the receiving space 70, the bent edge 23b1 on the first cover plate 11 will prevent the filter element 60 from sliding out, thereby constraining the filter element 60 and preventing the filter element 60 from slipping out of the filter device.

[0132] 9. The first filter structure 30 uses a filter screen to reduce costs.

[0133] 10. Several filter screen openings 10e are directly machined on the load-bearing cover plate 10, for example by stamping, to form a first filter screen structure 30. This first filter screen structure 30 has high strength, and the filter screen area can also support operators and related tools, thus increasing the working area available to the operators.

[0134] Those skilled in the art will understand that the steps, measures, and solutions in the various operations, methods, and processes discussed in this application can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and solutions in the prior art that are similar to those disclosed in this application can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0135] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0136] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0137] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0138] In the description of the present application, the specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0139] The above is only part of the embodiments of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A wind turbine generator system characterized by, The utility model relates to a generator, and the generator comprises a generator shell with a built-in rotor and stator, an air inlet for heat dissipation, and a filter device provided at the air inlet, wherein the force-bearing cover plate (10) of the filter device is connected with the force-bearing beam of the generator. The filter device comprises a force-bearing cover plate (10), a first filter screen structure (30), a second filter screen structure (40), and a filter core (60). The force-bearing cover plate (10) comprises a hollow part (10d); the part of the hollow part (10d) formed by the force-bearing cover plate (10) is bent downward along at least one of the two outer side edges in the length direction to form a length-directional enclosing plate (20) part of the accommodating space (70), and is bent again to form a bending part (20a) of the enclosing plate (20) for supporting the filter core (60) and the second filter screen structure (40); the bending part (20a) at least partially covers the lower side of the filter core (60). The force-bearing cover plate (10) and the enclosing plate (20) enclose the accommodating space (70) for filling the filter core (60), wherein the enclosing plate (20) forms at least part of the side wall of the accommodating space (70), and the force-bearing cover plate (10) is rigid and used for bearing the operator and related tools. The first filter screen structure (30) is arranged on the upper side of the filter core (60) and located on the lower side of the force-bearing cover plate (10) to substantially cover the upper side of the filter core (60). The second filter screen structure (40) is arranged on the lower side of the filter core (60) to cover the lower side of the filter core (60). The force-bearing cover plate (10) is provided with a mounting port for the filter core (60) to pass through. The filter core (60) is a flexible filter core (60); the mounting port of the force-bearing cover plate (10) comprises a first mounting port (10a) extending in the length direction of the force-bearing cover plate (10).

2. A wind power plant according to claim 1, characterised in that The force-bearing cover plate (10) comprises two hollow parts (10d), and the first mounting port (10a) is arranged between the two hollow parts (10d).

3. The wind power plant according to claim 2, characterized in that The filter core (60) is a flexible filter core (60); the mounting port of the force-bearing cover plate (10) comprises a first mounting port (10a) extending in the width direction of the force-bearing cover plate (10) and located at one end of the force-bearing cover plate (10), and the mounting port of the force-bearing cover plate (10) further comprises a filter core pushing hole (10b) extending in the length direction of the force-bearing cover plate (10).

4. A wind power plant according to claim 3, characterised in that The force-bearing cover plate (10) comprises two hollow parts (10d), and the filter core pushing hole (10b) is located between the two hollow parts (10d).

5. A wind power plant according to claim 2, characterised in that The first filter screen structure (30) comprises two component parts corresponding to the hollow parts (10d) and covering the upper side of the filter core (60).

6. A wind power plant according to claim 5, characterised in that The force-bearing cover plate (10) comprises a first cover plate (11) and a second cover plate (12).

7. A wind power plant according to claim 4 or 6, characterised in that ​ 8. The wind power plant according to claim 1, characterized in that ​ The first cover plate (11) and the second cover plate (12) are respectively located at two ends of the length direction of the filter element (60) and below the lower side of the filter element (60).

9. The wind power plant according to claim 8, characterized in that The surrounding plate (20) comprises a first supporting plate (21b) and a second supporting plate (22b) extending along the length direction of the filter element (60) and a first blocking plate (23b) and a second blocking plate (24b) extending along the width direction of the filter element (60). The first supporting plate (21b) and the second supporting plate (22b) form a C shape in the cross section along the length direction of the filter element (60), and the first blocking plate (23b) and the second blocking plate (24b) partially cover the upper side of the filter element (60).

10. The wind power plant according to claim 9, characterized in that The first blocking plate (23b) and / or the second blocking plate (24b) have a bent edge (23b1) bent towards the first cover plate (11), and the bent edge (23b1) and the corresponding cover plate form a second mounting opening (10c) of the filter element (60).

11. The wind power generating unit according to claim 1, characterized by The force bearing cover plate (10) comprises a plurality of filter screen openings (10e), and the force bearing cover plate (10) with the plurality of filter screen openings (10e) partially forms the first filter screen structure (30).

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