Bus connection structure

Abstract

The utility model discloses a bus connection structure, which comprises a bus conductor and a plurality of terminals connected to the end part of the bus conductor. The plurality of terminals are uniformly arranged around the end part of the bus conductor, each terminal is provided with a first end and a second end which are opposite to each other, the first end is connected with the end part of the bus conductor, the second end is exposed out of the bus conductor and is provided with a mounting hole, and the terminals are electrically connected with an external conductive piece through the mounting holes. The plurality of terminals are uniformly arranged around the end part of the bus conductor, and the first ends of the terminals are connected with the end part of the bus conductor, so that the contact area between the terminals and the bus conductor can be increased, and the increase of the contact area can reduce the contact resistance, thereby reducing the energy loss and heating caused by the resistance, and prolonging the service life of the bus conductor. The current-carrying capacity and the electric energy transmission efficiency of the bus connection structure are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric energy transmission, especially relates to a busbar connecting structure. BACKGROUND

[0002] The pipe type busbar is an important component in the power transmission and transformation system, and plays a crucial role in the safe and reliable operation of the power transmission and transformation system and power equipment. The pipe type busbar needs to be connected with the cable through a connecting structure to achieve reliable transmission of electric energy. The traditional connecting structure is limited by the space size and can only connect 6 or fewer cables, with a small load capacity. The existing wind turbine generators have 10 or more single-phase cables, and the existing wind power busbar connecting structure cannot meet such a large load capacity. In addition, the traditional pipe type busbar connecting structure will close the cavity of the pipe type busbar body, making it difficult for air to flow inside the pipe type busbar, which can cause the pipe type busbar to overheat. The temperature rise of the conductor affects the safe operation of the entire power transmission system. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a busbar connecting structure that improves the contact area between the first end of the terminal and the busbar, and improves the load capacity and electric energy transmission efficiency.

[0004] The above-mentioned purpose of the utility model is achieved by the following technical solutions:

[0005] A busbar connecting structure includes a busbar conductor and a plurality of terminals connected to the end of the busbar conductor. The plurality of terminals are evenly arranged around the end of the busbar conductor. The terminal has opposite first and second ends. The first end is connected to the end of the busbar conductor. The second end is exposed outside the busbar conductor and has a mounting hole. The terminal is electrically connected to an external conductive part through the mounting hole.

[0006] Optionally, the busbar conductor is a hollow structure or a solid structure.

[0007] Optionally, the radial cross-section of the busbar conductor is any one of a circle, a rectangle, an oval, and a rounded rectangle.

[0008] Optionally, the first end of the terminal is connected to the end of the busbar conductor by welding.

[0009] Optionally, the length of the connection between the first end of the terminal and the end of the busbar conductor is 1 / 3 to 1 / 2 of the length of the terminal.

[0010] Optionally, the first end of the terminal is provided with a buffer platform. The diameter of the cross-section of the buffer platform gradually decreases in the direction from away from the busbar conductor to close to the busbar conductor.

[0011] Optionally, the external conductive member is mounted to the mounting hole by a fastener.

[0012] Optionally, the terminal has a first face and a second face which are parallel to each other, at least part of the first face abuts against the busbar conductor, the mounting hole penetrates the first face and the second face, and the external conductive member is mounted to the mounting hole by at least one of the first face and the second face.

[0013] Optionally, the terminal has a cuboid shape, and the cuboid has the first face and the second face which are parallel to each other.

[0014] The utility model busbar connecting structure includes busbar conductor and multiple terminals which are connected to the end of busbar conductor. Multiple terminals are arranged around the end of busbar conductor evenly, and the terminal has opposite first end and second end, the first end is connected with the end of busbar conductor, the second end is exposed outside the busbar conductor and is provided with mounting hole, and the terminal is electrically connected with external conductive member through the mounting hole. By arranging multiple terminals around the end of busbar conductor evenly, the first end of terminal is connected with the end of busbar conductor, and the design can improve the contact area of terminal and busbar conductor, the increase of contact area can reduce contact resistance, and then reduce the energy loss and heat generation caused by resistance, improve busbar connecting structure load flow and electric energy transmission efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without paying creative labor.

[0016] Figure 1 It is an embodiment structure schematic view of the utility model busbar connecting structure;

[0017] Figure 2 It is still another embodiment structure schematic view of the utility model busbar connecting structure;

[0018] Figure 3 It is terminal structure schematic view of the utility model busbar connecting structure

[0019] Explanation of the drawings:

[0020]

[0021]

[0022] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0026] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or solutions that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] Pipe type busbar is an important component in power transmission and transformation system, and plays a vital role in the safe and reliable operation of power transmission and transformation system and power equipment. The pipe type busbar needs to be connected with cables through a connecting structure to achieve the purpose of reliable transmission of electric energy. The traditional connecting structure is limited by the space size and can only connect 6 or fewer cables, with small load current. The existing wind turbine generators have 10 or more single-phase cables, and the existing wind power busbar connecting structure cannot meet such a large load current. A busbar connecting structure 100 is provided for this situation.

[0028] Please refer to Figures 1-3 The busbar connecting structure 100 provided by the utility model has the advantages that the busbar conductor 10 and the plurality of terminals 20 are arranged separately, the number of terminals 20 can be selected according to actual needs, and the busbar system can better meet the needs of different customers and different application scenarios.

[0029] It can be understood that the number of terminals 20 can be 3, 4, 5, etc., which is not limited herein, and can be selected by a person skilled in the art according to actual conditions. The busbar conductor 10 and the terminal 20 are arranged separately, the number of terminals 20 can be selected according to actual needs, and the busbar system can better meet the needs of different customers and different application scenarios.

[0030] The busbar connecting structure 100 provided by the utility model has the advantages that the busbar conductor 10 and the plurality of terminals 20 are arranged separately, the number of terminals 20 can be selected according to actual needs, and the busbar system can better meet the needs of different customers and different application scenarios.

[0031] In an embodiment, the busbar conductor 10 is a hollow structure or a solid structure.

[0032] It can be understood that the current carrying capacity, heat dissipation performance and skin effect of the hollow busbar conductor 10 are better than those of the solid busbar conductor 10. The hollow busbar conductor 10 has a larger surface area, which helps to increase the current carrying capacity and improve the heat dissipation performance. Since the hollow structure can form an air duct inside, natural air cooling can improve the heat dissipation efficiency and reduce power loss. The effective current carrying capacity per unit cross section is high and the loss is small; the skin effect coefficient Kf of the hollow busbar conductor 10 is close to 1, and the AC resistance is small, which reduces the power loss of the busbar conductor 10. The surface area of ​​the solid busbar conductor 10 is relatively small, and it does not have the advantage of natural air cooling. It may have higher power loss when high current is transmitted; the solid busbar conductor 10 may have a higher skin effect at higher frequencies, which will increase the AC resistance and increase power loss. Those skilled in the art can choose a busbar conductor 10 with a hollow structure or a solid structure according to actual needs. The hollow busbar conductor 10 is structured so that the plurality of terminals 20 are evenly arranged around the end of the busbar conductor 10 , which can completely avoid the cavity of the hollow busbar conductor 10 and will not reduce the heat dissipation of the hollow busbar conductor 10 .

[0033] In one embodiment, please refer to Figure 1 、 Figure 2 The radial cross section of the busbar conductor 10 is any one of a circle, a rectangle, an ellipse and a rounded rectangle.

[0034] It is understandable that those skilled in the art can select the radial cross-section of the busbar conductor 10 according to actual needs, and no limitation is made here.

[0035] In one embodiment, please refer to Figure 1 、 Figure 2 The first end 21 of the terminal 20 is connected to the end of the busbar conductor 10 by welding.

[0036] As can be understood, the terminal 20 abuts against the busbar conductor 10, and the gap between the two is welded. Welding can ensure good electrical continuity between the terminal 20 and the busbar conductor 21, reduce contact resistance, and thus reduce energy loss and heat.

[0037] In one embodiment, please refer to Figure 1 、 Figure 2 The connection length between the first end 21 of the terminal 20 and the end of the busbar conductor 10 accounts for 1 / 3 to 1 / 2 of the length of the terminal 20.

[0038] It is understandable that the overlap size between the terminal 20 and the busbar conductor 10 should be increased as much as possible to reduce the current density on the connection surface and reduce the temperature rise of the connection surface.

[0039] In one embodiment, please refer to Figures 1-3The first end 21 of the terminal 20 is provided with a buffer platform 211, which gradually decreases in cross-sectional diameter from a direction away from the busbar conductor 10 to a direction close to the busbar conductor 10.

[0040] It can be understood that the provision of the buffer platform 211 allows the outer insulating structure of the busbar connection structure 100 to have a slow transition area, which helps to reduce the pressure on the insulating layer due to the change in the external dimensions between the busbar conductor 10 and the terminal 20. By providing a buffer area, the buffer platform 211 helps to prevent the outer insulating layer from being torn due to a large change in size. This is crucial for maintaining the integrity of the busbar system and preventing potential electrical faults.

[0041] In an embodiment, referring to Figure 1 The external conductive member 30 is installed in the mounting hole 22A by means of the fastener 40.

[0042] It can be understood that the fastener 40, such as a bolt, screw, or nut, is used to fix the external conductive member 30 in the mounting hole 22A of the terminal 20, ensuring the stability and reliability of the electrical connection. The fastener 40 ensures good electrical contact between the external conductive member 30 and the terminal 20 by applying appropriate pre-tightening force, reducing contact resistance, and avoiding overheating or arcing caused by poor contact. The external conductive member 30 can be a wire, cable, soft copper, aluminum strip, or other objects with conductive properties.

[0043] In an embodiment, referring to Figures 1-3 The terminal 20 has a first face 23 and a second face 24 that are parallel to each other, at least part of the first face 23 abuts the busbar conductor 10, the mounting hole 22A penetrates the first face 23 and the second face 24, and at least one of the first face 23 and the second face 24 installs the external conductive member 30 through the mounting hole 22A.

[0044] It can be understood that at least part of the first face 23 abuts the busbar conductor 10, and the gap between the two is filled with a welding material that is compatible with the base materials of the busbar conductor 10 and the terminal 20 using a gas shielded welding technique. At least one of the first face 23 and the second face 24 installs the external conductive member 30 through the mounting hole 22A, which can be only the first face 23 installing the external conductive member 30 through the mounting hole 22A, or only the second face 24 installing the external conductive member 30 through the mounting hole 22A, or both the first face 23 and the second face 24 installing the external conductive member 30 through the mounting hole 22A. The number of external conductive members 30 installed through the mounting hole 22A can be determined according to actual conditions and is not limited here.

[0045] In an embodiment, referring to Figures 1-3 Figures 1-3 The terminal 20 is in the shape of a cuboid, and the cuboid has a first face 23 and a second face 24 that are parallel to each other.

[0046] It can be understood that the terminal 10 can be made of aluminum bar standard parts, and is made by using an extrusion or drawing process. Compared with a cast custom part, the use of the standard parts and the production process can greatly save manufacturing costs, reduce material costs, and improve economic efficiency.

[0047] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields under the inventive concept of the present application is included in the patent protection scope of the present application.

Claims

1. A busbar connection structure, characterized in that: It includes a busbar conductor and a plurality of terminals connected to the end of the busbar conductor; the plurality of terminals are evenly arranged around the end of the busbar conductor, and the terminals have a first end and a second end opposite to each other, the first end is connected to the end of the busbar conductor, and the second end is exposed outside the busbar conductor and has a mounting hole, and the terminal is electrically connected to the external conductive member through the mounting hole.

2. The busbar connection structure according to claim 1, characterized in that: The busbar conductor is a hollow structure or a solid structure.

3. The busbar connection structure according to claim 1, characterized in that: The radial cross section of the busbar conductor is any one of a circle, a rectangle, an ellipse and a rounded rectangle.

4. The busbar connection structure according to claim 1, characterized in that: The first end of the terminal is connected to the end of the busbar conductor by welding.

5. The busbar connection structure according to claim 1, characterized in that: The connection length between the first end of the terminal and the end of the busbar conductor accounts for 1 / 3 to 1 / 2 of the length of the terminal.

6. The busbar connection structure according to claim 1, characterized in that: A buffer platform is provided at the first end of the terminal, and a diameter of a cross section of the buffer platform gradually decreases along a direction away from the busbar conductor to close to the busbar conductor.

7. The busbar connection structure according to claim 1, characterized in that: The external conductive member is mounted on the mounting hole through a fastener.

8. The busbar connection structure according to claim 1, characterized in that: The terminal has a first surface and a second surface parallel to each other, at least a portion of the first surface abuts against the busbar conductor, the mounting hole passes through the first surface and the second surface, and the external conductive member is mounted on at least one of the first surface and the second surface through the mounting hole.

9. The busbar connection structure according to claim 8, characterized in that: The terminal is in the shape of a cuboid, and the cuboid has the first surface and the second surface which are parallel to each other.

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