Fixed structure and offshore wind power transformer

Abstract

The utility model discloses a fixed structure and offshore wind power transformer. The fixed structure includes first fixed part, second fixed part, screw rod and limit nut, and first fixed part is used for fixed connection with the oil tank wall of transformer, and first fixed part is equipped with the threaded hole, and second fixed part is used for fixed connection with the iron core clamp spare of transformer, and first fixed part and second fixed part are oppositely arranged, and screw rod is screwed in the threaded hole, and the end of screw rod away from first fixed part is used for abutting with second fixed part, and limit nut is screwed on screw rod, and when screw rod abuts with second fixed part, limit nut abuts with first fixed part to lock screw rod. Adopt the fixed structure, can limit transformer body displacement in horizontal direction, to reduce the influence of cabin vibration to transformer body stability, improve cabin transformer anti -vibration performance, prevent transformer damage due to vibration, guarantee the reliability of cabin transformer in use, prolong the service life of cabin transformer.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a fixed structure and an offshore wind power transformer. Background Technology

[0002] In recent years, offshore wind power has flourished, and the step-up transformer on the turbine side, as an indispensable component, is gradually shifting from installation inside the tower to installation inside the nacelle. However, unlike tower-mounted transformers, transformers installed in the nacelle, due to their high installation height, need to withstand continuous, multi-frequency vibrations, which poses a significant challenge to the transformer's vibration resistance.

[0003] In related technologies, the mainstream methods of fixing the transformer body mainly rely on the bottom positioning nails and the body pads for fixing, and the positioning nails on the cover for fixing to the top beam of the transformer body. However, since these methods require a margin, the openings on the pads and the top beam are often much larger than the positioning nails. This makes this positioning method perform reasonably well in normal environments, but when used on nacelle transformers, the transformer body will continuously and slightly shift in this gap. Under long-term action, this may lead to the transformer body shifting or deflecting. In more serious cases, it may cause the weld at the positioning nail to crack, resulting in the positioning nail breaking and causing major safety hazards or accidents. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a fixing structure that can restrict the displacement of the transformer body in the horizontal direction, so as to reduce the impact of nacelle vibration on the stability of the transformer body.

[0005] This utility model also provides an offshore wind power transformer that adopts the above-mentioned fixed structure.

[0006] The fixing structure according to a first aspect of the present invention includes a first fixing member, a second fixing member, a screw, and a limiting nut. The first fixing member is used to fixably connect to the tank wall of the transformer, and the first fixing member is provided with a threaded hole. The second fixing member is used to fixably connect to the core clamp of the transformer, and the first fixing member and the second fixing member are arranged opposite to each other. The screw is threadedly connected to the threaded hole, and the end of the screw away from the first fixing member is used to abut against the second fixing member. The limiting nut is threadedly connected to the screw, and when the screw abuts against the second fixing member, the limiting nut abuts against the first fixing member to lock the screw.

[0007] The fixing structure according to the embodiments of the present invention has at least the following beneficial effects: the fixing structure of the present invention can limit the displacement of the transformer body in the horizontal direction, thereby reducing the impact of nacelle vibration on the stability of the transformer body, improving the vibration resistance of the nacelle transformer, preventing damage to the transformer due to vibration, ensuring the reliability of the nacelle transformer in use, and extending the service life of the nacelle transformer.

[0008] According to some embodiments of the present invention, the second fixing member includes a positioning member and a second connecting member, the positioning member and the second connecting member are fixedly connected, the positioning member is used to abut against the screw, and the second connecting member is used to be fixedly connected to the iron core clamp.

[0009] According to some embodiments of the present invention, the positioning member is provided with a damping member on the side facing the screw, and the screw is used to abut against the damping member.

[0010] According to some embodiments of the present invention, the positioning member is provided with a receiving groove, and the damping member is disposed in the receiving groove.

[0011] According to some embodiments of the present invention, an elastic washer is sleeved on the screw between the first fixing member and the limiting nut.

[0012] According to some embodiments of the present invention, the end of the screw near the first fixing member is square to facilitate the rotation of the screw using a tool.

[0013] According to some embodiments of the present invention, the end of the screw near the second fixing member is a smooth cylindrical section, which facilitates the application of a protective sleeve.

[0014] According to some embodiments of the present invention, the first fixing member includes a connecting plate and a first connecting member, the connecting plate and the first connecting member are fixedly connected, the threaded hole is provided in the connecting plate, and the first connecting member is used to be fixedly connected to the tank wall.

[0015] According to a second aspect of the present invention, an offshore wind power transformer includes an oil tank, a transformer body, and a plurality of fixed structures as described in any one of the preceding claims.

[0016] The offshore wind power transformer according to the embodiments of the present invention has at least the following beneficial effects: the above-mentioned fixed structure of the offshore wind power transformer of the present invention can limit the displacement of the transformer body in the horizontal direction, so as to reduce the impact of nacelle vibration on the stability of the transformer body, improve the vibration resistance of the nacelle transformer, prevent the transformer from being damaged by vibration, ensure the reliability of the nacelle transformer in use, and extend the service life of the nacelle transformer.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a three-dimensional schematic diagram of a fixing structure according to an embodiment of the present utility model;

[0020] Figure 2 This is a three-dimensional exploded view of a fixed structure according to an embodiment of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of an embodiment of an offshore wind power transformer according to the present invention;

[0022] Figure 4 This is a top view schematic diagram of an embodiment of the offshore wind power transformer of this utility model.

[0023] Icon labels:

[0024] First fastener 100, connecting plate 110, threaded hole 111, first connector 120;

[0025] Second fixing member 200, positioning member 210, receiving groove 211, second connecting member 220, first fixing plate 221, second fixing plate 222, damping member 230, concave surface 231;

[0026] Screw 300;

[0027] Limit nut 400, elastic washer 410;

[0028] Offshore wind power transformer 500, oil tank 510, transformer body 520, core clamp 521. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the orientation descriptions, such as left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0031] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 The fixing structure of this utility model embodiment includes a first fixing member 100, a second fixing member 200, a screw 300, and a limiting nut 400. The first fixing member 100 is provided with a threaded hole 111, which is used to connect with the screw 300 by thread to facilitate the initial tightening of the screw 300. The first fixing member 100 can be made of materials such as Q235A, which has the characteristics of suitable strength, good plasticity and toughness, low cost, and good processing performance. The first fixing member 100 is used to fix and connect with the oil tank 510 of the transformer. It should be noted that the first fixing member 100 and the oil tank 510 of the transformer can be fixedly connected by welding, fastener connection, or other methods.

[0034] The second fixing member 200 is arranged opposite to the first fixing member 100. The second fixing member 200 is used to fix and connect to the core clamp 521 of the transformer 500. It should be noted that the second fixing member 200 and the core clamp 521 of the transformer 500 can be fixedly connected by welding, fastener connection, or other methods. The screw 300 is threaded into the threaded hole 111. The end of the screw 300 away from the first fixing member 100 is used to abut against the second fixing member 200. The limiting nut 400 is threaded into the screw 300. When the screw 300 abuts against the second fixing member 200, the limiting nut 400 abuts against the first fixing member 100 to lock the screw 300. The limiting nut 400 can tighten the fixing screw 300 a second time to prevent the screw 300 from loosening due to long-term vibration.

[0035] By adopting the fixing structure of this utility model, vibration energy is transmitted to the surrounding identical structures through the fixing structure and clamps. This can limit the displacement of the transformer body 520 in the horizontal direction, thereby reducing the impact of nacelle vibration on the stability of the transformer body 520, improving the vibration resistance of the nacelle transformer, preventing damage to the transformer due to vibration, ensuring the reliability of the nacelle transformer in use, and extending the service life of the nacelle transformer.

[0036] Reference Figure 1 , Figure 2 , Figure 3 In some embodiments, the second fixing member 200 includes a positioning member 210 and a second connecting member 220. The positioning member 210 is used to abut against the screw 300. The positioning member 210 and the second connecting member 220 are fixedly connected by welding or fastener connection. The second connecting member 220 can be fixedly connected to the iron core clamp 521 by welding or fastener connection.

[0037] Reference Figure 1 , Figure 2 In this embodiment, the second connector 220 includes a first fixing plate 221 and a second fixing plate 222. The first fixing plate 221 and the second fixing plate 222 are arranged in a cross shape and welded together. The first fixing plate 221 and the second fixing plate 222 extend away from the positioning member 210 along the axial direction of the screw 300. One end of the first fixing plate 221 and the second fixing plate 222 is fixedly connected to the positioning member 210, and the other end of the first fixing plate 221 and the second fixing plate 222 is used to be fixedly connected to the iron core clamp 521.

[0038] Reference Figure 1 , Figure 2 In some embodiments, the positioning member 210 has a damping member 230 on the side facing the screw 300, and the screw 300 abuts against the damping member 230. The damping member 230 has a circular concave surface 231 on the side facing the screw 300 to facilitate the screw 300's clamping and to prevent metal debris generated by long-term friction. The damping member 230 is made of a high-damping material to reduce the amplitude of vibration and impact.

[0039] Reference Figure 1 , Figure 2 In some embodiments, the positioning member 210 is provided with a receiving groove 211, and the damping member 230 is disposed in the receiving groove 211 to facilitate the positioning of the damping member 230 and prevent the damping member 230 from deviating.

[0040] Reference Figure 2In some embodiments, an elastic washer 410 is fitted on the screw 300 between the first fixing member 100 and the limiting nut 400. The limiting nut 400 can tighten the screw 300 a second time to prevent the screw 300 from loosening due to long-term vibration. The elastic washer 410 can absorb vibration energy through its own deformation to reduce the impact of vibration on the screw 300.

[0041] Reference Figure 1 , Figure 2 In some embodiments, the end of the screw 300 near the first fixing member 100 is square, and the size of the square end is smaller than the diameter of the threaded hole 111, so as to facilitate the rotation of the screw 300 with a tool and to reduce the distance between the first fixing member 100 and the wall of the oil tank 510.

[0042] Reference Figure 1 , Figure 2 In some embodiments, the end of the screw 300 near the second fixing member 200 is a smooth cylindrical section. The cylindrical section facilitates the application of a protective sleeve. The protective sleeve cooperates with the damping member 230 to improve the friction between the screw 300 and the second fixing member 200 during use.

[0043] Reference Figure 1 , Figure 2 In some embodiments, the first fastener 100 includes a connecting plate 110 and a first connector 120, which are fixedly connected. A threaded hole 111 is provided in the connecting plate 110, and the first connector 120 is used to be fixedly connected to the wall of the oil tank 510.

[0044] Reference Figures 1 to 4 In the specific embodiment shown in the figure, the body fixing structure consists of a first fixing member 100, a second fixing member 200, a damping member 230, a screw 300, an elastic washer 410, and a limiting nut 400. The first fixing member 100 is welded to the oil tank 510, and the second positioning member 210 is welded to the iron core clamp 521. The screw 300 passes through the threaded hole 111 on the first fixing member 100, and the threaded hole 111 is threaded. After pressing the damping member 230 onto the second fixing member 200, the limiting nut 400 is tightened, thereby forming a complete fixing structure. When the transformer vibrates with the cabin, the damping member 230 can reduce the displacement amplitude of the transformer body 520 affected by the vibration. The vibration energy is transmitted to the same structure around it through the clamp, so that the displacement cancels each other out.

[0045] Reference Figure 3 , Figure 4The offshore wind power transformer 500 of this utility model includes an oil tank 510, a transformer body 520, a core clamp 521, and a fixing structure for any of the above. The fixing structure of the offshore wind power transformer 500 of this utility model can limit the displacement of the transformer body 520 in the horizontal direction, thereby reducing the impact of nacelle vibration on the stability of the transformer body 520, improving the vibration resistance of the nacelle transformer, preventing damage to the transformer due to vibration, ensuring the reliability of the nacelle transformer in use, and extending the service life of the transformer.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A fixed structure for offshore wind power transformers, characterized in that, include: The first fixing member is used to fix it to the tank wall of the transformer, and the first fixing member is provided with a threaded hole; The second fixing member is used to fix and connect with the core clamp of the transformer, and the first fixing member and the second fixing member are arranged opposite to each other; A screw is threaded into the threaded hole, and the end of the screw away from the first fixing member is used to abut against the second fixing member; A limiting nut is threadedly connected to the screw rod. When the screw rod abuts against the second fixing member, the limiting nut abuts against the first fixing member to lock the screw rod.

2. The fixing structure according to claim 1, characterized in that, The second fixing member includes a positioning member and a second connecting member, which are fixedly connected. The positioning member is used to abut against the screw, and the second connecting member is used to be fixedly connected to the iron core clamp.

3. The fixing structure according to claim 2, characterized in that The positioning member has a damping element on the side facing the screw, and the screw is used to abut against the damping element.

4. The fixing structure according to claim 3, characterized in that The positioning member is provided with a receiving groove, and the damping member is disposed in the receiving groove.

5. The fixture of claim 1, wherein An elastic washer is fitted on the screw between the first fixing member and the limiting nut.

6. The fixture of claim 1, wherein The end of the screw near the first fixing member is square to facilitate rotation of the screw using a tool.

7. The fixture of claim 1, wherein The end of the screw near the second fixing member is a smooth cylindrical section, which facilitates the application of a protective sleeve.

8. The fixture of claim 1, wherein The first fastener includes a connecting plate and a first connector, the connecting plate and the first connector are fixedly connected, the threaded hole is provided in the connecting plate, and the first connector is used to be fixedly connected to the tank wall.

9. A type of offshore wind power transformer, characterized in that, It includes a fuel tank, a vessel body, and a plurality of fixed structures as described in any one of claims 1 to 8.

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