Busbar of fan converter

Abstract

The utility model relates to a fan converter busbar, which comprises a busbar and an elongated insulating shrink film spirally wound on the outer surface of the busbar. More than one groove with a c-shaped cross section is formed in the side edge of one side of the back surface of the insulating shrink film at intervals along the length direction of the insulating shrink film, and the grooves are relatively parallel; a plurality of convex edges are arranged on the side edge of one side, far away from each groove, of the front surface of the insulating shrink film at intervals along the length direction of the insulating shrink film, the convex edges are relatively parallel, the number of the grooves is the same as that of the convex edges, and each groove is matched with each convex edge in size; and when the back surface of the insulating shrink film is spirally wound on the outer surface of the busbar, the ribs on the front surface of the insulating shrink film are embedded into the grooves on the back surface of the insulating shrink film. The insulating shrink film is arranged on the outer surface of the busbar, so that the surface of the busbar has insulating performance, and the insulating shrink film is convenient to replace.

Description

Technical Field

[0001] This utility model relates to the field of busbar equipment technology, and in particular to a busbar for a wind turbine converter. Background Technology

[0002] The busbar of a wind turbine converter (hereinafter referred to as busbar) is a metallic conductive material used in wind power converters to centrally collect power and distribute it to multiple output terminals. During installation, the spacing between busbars meets safety requirements; therefore, existing busbar surfaces are generally not insulated. However, in actual use, the direct exposure of the busbar (metal) increases the risk of electric shock for maintenance personnel. Furthermore, the surface of the busbar oxidizes after prolonged operation, and dust and dirt accumulate on the surface, making it difficult to clean. This accumulation of dust and dirt can cause leakage, flashover, and power outages. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model proposes a busbar for a wind turbine converter, which has an insulating structure on the surface of the busbar and facilitates the replacement of the insulating structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A wind turbine converter busbar includes a busbar and an elongated insulating shrink film spirally wound around the outer surface of the busbar.

[0006] On one side of the back of the insulating shrink film, one or more grooves with a C-shaped cross-section are spaced apart along the length of the insulating shrink film, and the grooves are parallel to each other.

[0007] On the side of the insulating shrink film away from each groove on the front side, multiple raised ridges are provided at intervals along the length of the insulating shrink film. The raised ridges are parallel to each other. The number of grooves is the same as the number of raised ridges, and the size of each groove is adapted to each raised ridge.

[0008] When the back side of the insulating shrink film is spirally wound around the outer surface of the busbar, the protruding ridges on the front side of the insulating shrink film are embedded in the grooves on the back side of the insulating shrink film.

[0009] Furthermore, the front side of the insulating shrink film, and the area outside each protruding ridge, is coated with a thermochromic material to form a thermochromic material layer.

[0010] Furthermore, each of the raised edges is coated with an insulating and thermally conductive adhesive to form a first insulating and thermally conductive adhesive layer, and the front side of the insulating shrink film is provided with a first release paper covering the first insulating and thermally conductive adhesive layer.

[0011] Furthermore, the area on the back of the insulating shrink film outside each groove is coated with an insulating thermally conductive adhesive to form a second insulating thermally conductive adhesive layer, and the front of the insulating shrink film is provided with a second release paper covering the second insulating thermally conductive adhesive layer.

[0012] Furthermore, the thickness of the insulating shrink film is 3 mm or more.

[0013] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0014] When using the busbar of this wind turbine converter, an insulating shrink film is wrapped around the outer surface of the busbar to provide insulation and facilitate replacement. Specifically, when the back side of the insulating shrink film is spirally wound around the outer surface of the busbar, the back side of the insulating shrink film is adhered to the outer surface of the busbar by a second insulating and thermally conductive adhesive layer. The protruding ridges on the front side of the insulating shrink film are embedded into the grooves on the back side of the insulating shrink film, and the protruding ridges on the front side and the grooves on the back side of the insulating shrink film are bonded together by the first insulating and thermally conductive adhesive layer. Then, the insulating shrink film is heated by a hot air device, causing it to shrink and adhere more tightly to the outer surface of the busbar, making installation convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the insulating shrink film.

[0017] Figure 3 yes Figure 2 A cross-sectional view of the insulating shrink film along AA. Detailed Implementation

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0019] refer to Figure 1 , Figure 2 and Figure 3 This embodiment provides a wind turbine converter busbar, including a busbar 1 and an elongated insulating shrink film 2 spirally wound around the outer surface of the busbar 1. The insulating shrink film 2 is made of a heat-shrinkable material, which is an existing material and will not be described in detail here.

[0020] The middle position of the insulating shrink film 2 is used as the measurement standard. The thickness of the insulating shrink film 2 is more than 3mm, and it is selected according to the working voltage of the busbar 1.

[0021] On one side of the back surface of the insulating shrink film 2, one or more C-shaped grooves 21 are spaced apart along the length of the insulating shrink film 2, and the grooves 21 are parallel to each other. Figure 1 Only two grooves 21 are shown in the image.

[0022] The back of the insulating shrink film 2, outside the grooves 21, is coated with an insulating thermally conductive adhesive to form a second insulating thermally conductive adhesive layer (not shown in the figure, but those skilled in the art should understand the location of the second insulating thermally conductive adhesive layer), and the front of the insulating shrink film 2 is provided with a second release paper 24 covering the second insulating thermally conductive adhesive layer. The insulating thermally conductive adhesive is a vulcanized silicone adhesive.

[0023] On the side of the insulating shrink film 2, away from the grooves 21, a plurality of raised ridges 22 are spaced apart along the length of the insulating shrink film 2. The raised ridges 22 are parallel to each other. The number of grooves 21 is the same as the number of raised ridges 22, and the size of each groove 21 is adapted to each raised ridge 22. The surface of each raised ridge 22 is coated with an insulating thermally conductive adhesive to form a first insulating thermally conductive adhesive layer (not shown in the figure, but those skilled in the art should understand the location of the first insulating thermally conductive adhesive layer). A first release paper 23 covering the first insulating thermally conductive adhesive layer is provided on the front side of the insulating shrink film 2.

[0024] When the back of the insulating shrink film 2 is spirally wound onto the outer surface of the busbar 1, the first release paper 23 and the second release paper 24 are peeled off. During winding, the back of the insulating shrink film 2 is adhered to the outer surface of the busbar 1 through the second insulating thermally conductive adhesive layer, and the protruding ridges 22 on the front of the insulating shrink film 2 are embedded into the grooves 21 on the back of the insulating shrink film 2 (not shown in the figure, but those skilled in the art should be able to understand the arrangement of the protruding ridges 22 and the grooves 21 without any doubt based on the content of the specification and the accompanying drawings). The protruding ridges 22 on the front of the insulating shrink film 2 and the grooves 21 on the back of the insulating shrink film 2 are adhered together by the first insulating thermally conductive adhesive layer. Then, the insulating shrink film 2 is heated by a hot air device, causing the insulating shrink film 2 to shrink and adhere more tightly to the outer surface of the busbar, making installation convenient.

[0025] If the insulating shrink film 2 needs to be replaced, simply remove the insulating shrink film 2 from the busbar 1 using a tool.

[0026] Furthermore, the front side of the insulating shrink film 2, and the area outside each of the raised ridges 22, is coated with a thermochromic material to form a thermochromic material layer (not shown in the figure). During operation, the temperature of the busbar 1 rises. The temperature of the busbar 1 can be determined by observing the color development of the thermochromic material layer, and the heating temperature of the busbar 1 can be determined by judging the color distribution of the thermochromic material layer. If the insulating shrink film 2 ages, resulting in uneven color distribution of the thermochromic material layer on the insulating shrink film 2, the insulating shrink film 2 on the busbar 1 needs to be replaced as soon as possible.

[0027] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A busbar for a wind turbine converter, comprising a busbar, characterized in that: It also includes a long strip of insulating shrink film spirally wound around the outer surface of the busbar; On one side of the back of the insulating shrink film, one or more grooves with a C-shaped cross-section are spaced apart along the length of the insulating shrink film, and the grooves are parallel to each other. On the side of the insulating shrink film away from each groove on the front side, multiple raised ridges are provided at intervals along the length of the insulating shrink film. The raised ridges are parallel to each other. The number of grooves is the same as the number of raised ridges, and the size of each groove is adapted to each raised ridge. When the back side of the insulating shrink film is spirally wound around the outer surface of the busbar, the protruding ridges on the front side of the insulating shrink film are embedded in the grooves on the back side of the insulating shrink film.

2. The busbar of a wind turbine converter according to claim 1, characterized in that: The front side of the insulating shrink film, and the area outside each protruding ridge, is coated with a thermochromic material to form a thermochromic material layer.

3. A wind turbine converter busbar according to claim 1 or 2, characterized in that: Each of the raised edges is coated with an insulating and thermally conductive adhesive to form a first insulating and thermally conductive adhesive layer, and the front side of the insulating shrink film is provided with a first release paper covering the first insulating and thermally conductive adhesive layer.

4. The busbar of a wind turbine converter according to claim 3, characterized in that: The area on the back of the insulating shrink film outside each groove is coated with an insulating thermally conductive adhesive to form a second insulating thermally conductive adhesive layer, and the front of the insulating shrink film is provided with a second release paper covering the second insulating thermally conductive adhesive layer.

5. The busbar of a wind turbine converter according to claim 1, characterized in that: The thickness of the insulating shrink film is 3 mm or more.

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