A large transformer provided with a thickness-adjusting strut assembly

Abstract

The utility model discloses a large -scale transformer with thickness adjusting strut subassembly, include: first coil, set up in the first coil outside's second coil, set up between the first coil with the second coil a plurality of strut subassembly, the strut subassembly includes at least two main strut, and set up between adjacent two main strut's adjusting unit, adjusting unit includes at least two detachable adjusting plate of connection, the utility model discloses high integration, good reliability, adjusting unit is directly integrated on main strut, and there is no additional scattered component, there is no risk of displacement or falling, and the structure is stable, and the insulation performance is reliable. It is extremely simple to operate, and just need to tear off adjusting plate to complete the adjustment, save the cumbersome step of seeking, trying pad washer, improve assembly efficiency and production rhythm greatly. And strong applicability, can arrange multiple adjustment points according to the need in the key position of coil, realize the adjustment to coil radial profile.

Description

Technical Field

[0001] This utility model relates to the field of transformer support bar technology, and in particular to a large transformer equipped with a thickness adjustable support bar assembly. Background Technology

[0002] In the manufacturing and assembly of large transformer coils, ensuring the stability of the coil's radial dimensions and the consistency of diameters among multiple parallel coils is crucial. This directly affects the coil's overall mechanical strength, short-circuit withstand capability, and the smooth progress of subsequent assembly and pressing processes.

[0003] Currently, the control of coil radial dimensions mainly relies on support bars and spacers of fixed thickness. However, due to factors such as fluctuations in conductor insulation thickness, uneven winding tension, and insulation shrinkage, the actual radial dimensions of the coil after winding often deviate from the design value. The traditional solution is to add insulating spacers of different thicknesses between the support bars and the yoke or pressure plate.

[0004] Existing technologies have significant drawbacks: 1. Difficulty in precision control: Limited gasket thickness specifications make precise micron-level adjustment difficult, resulting in unsatisfactory compensation effects. 2. Low efficiency: Repeated testing, measurement, and adjustment are required, a cumbersome process that significantly impacts production efficiency. 3. Reliability risks: Dispersed gaskets may shift or detach during subsequent processing or operational vibrations, affecting the stability of the insulation structure. 4. Uneven pressure: The coarse compensation method makes it difficult to ensure a uniform distribution of radial pressure from the pressure plate to the coil, potentially leading to localized overvoltage or undervoltage. Utility Model Content

[0005] This utility model overcomes the shortcomings of the existing technology in that the thickness of the support bars is difficult to adjust, and provides a large transformer with a thickness adjustment support bar assembly. To achieve the above objective, the technical solution adopted by this utility model is as follows: a large transformer with a thickness adjustment support bar assembly, comprising: a first coil, a second coil disposed outside the first coil, and a plurality of support bar assemblies disposed between the first coil and the second coil;

[0006] The support assembly includes at least two main support bars and an adjustment unit disposed between two adjacent main support bars; the adjustment unit includes at least two detachably connected adjustment plates.

[0007] In a preferred embodiment of this utility model, one side of the main support bar is a fixed surface and the other side is an adjustable surface. The fixed surface is fixed to the first coil or the second coil, and the adjustable surface is connected to the adjusting unit.

[0008] In a preferred embodiment of this invention, the adjusting plate is made of insulating paper.

[0009] In a preferred embodiment of this utility model, two adjacent adjustment plates are peelably bonded together.

[0010] In a preferred embodiment of the present invention, an insulating ring is provided between the first coil and the support bar assembly, and a plurality of the support bar assemblies are evenly arranged circumferentially along both sides of the insulating ring.

[0011] In a preferred embodiment of this invention, the height of the insulating ring is greater than the height of the support bar assembly, and the heights of the first coil and the second coil are equal to the height of the support bar assembly.

[0012] In a preferred embodiment of this utility model, the thickness of the adjusting plate is 1mm.

[0013] In a preferred embodiment of this utility model, the adjustment unit is disposed on the outside of the main support bar.

[0014] In a preferred embodiment of this invention, the main support strip is made of laminated cardboard.

[0015] In a preferred embodiment of this utility model, the main support bar and the adjustment unit are fixedly connected by pressing or gluing.

[0016] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0017] This invention boasts high integration and reliability. The adjustment unit is directly integrated into the main support bar, eliminating the need for additional loose parts and the risk of displacement or detachment. The structure is robust, and the insulation performance is reliable. Operation is extremely simple; adjustment is completed simply by tearing off the adjustment plate, eliminating the tedious steps of finding and testing shims, significantly improving assembly efficiency and production cycle time. Furthermore, it is highly adaptable, allowing for flexible arrangement of multiple adjustment points at key coil locations (such as ends or transposition points) to adjust the coil's radial profile as needed. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram showing the installation position of a large transformer equipped with a thickness adjustment support assembly according to one embodiment of the present invention;

[0020] Figure 2This is a schematic diagram of a large transformer equipped with a thickness adjustment support bar assembly, as described in one embodiment of the present invention.

[0021] The reference numerals in the attached figures are explained as follows: Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0023] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used 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, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0026] This utility model discloses a large transformer equipped with a thickness-adjustable support assembly, wherein, as shown in the figure... Figure 1 As shown, it includes: a first coil, a second coil disposed outside the first coil, and several support bar assemblies disposed between the first coil and the second coil. That is, the first coil and the second coil are concentrically wound on the core column, and several support bar assemblies are disposed between the first coil and the second coil to form an oil gap.

[0027] Continue to refer to Figure 1 As shown, the support strip assembly includes at least two main support strips and an adjustment unit disposed between two adjacent main support strips. This invention primarily uses the adjustment unit to adjust the overall thickness of the support strip assembly.

[0028] The main support bar has a flat, fixed surface on one side and an adjustable surface on the other. The fixed surface is fixed to the first or second coil, and the adjustable surface is connected to the adjusting unit. The main support bar and the adjusting unit are fixed together by pressing or gluing. This method of connection or fixation ensures a reliable overall connection of the support bar assembly.

[0029] The adjustment unit includes at least two detachably connected adjustment plates, with adjacent adjustment plates being peelably bonded together. Preferably, the thickness of the adjustment plates is 1 mm.

[0030] In this invention, the adjusting plate can be thinned along its own axis by peeling it off, thereby reducing the number of adjusting plates and changing the overall effective thickness of the main support bar.

[0031] Both the main support bar and the adjusting plate are made of insulating materials. Specifically, the main support bar is made of laminated cardboard, and the adjusting plate is made of insulating paper. The entire structure is made of insulating materials, which enhances the insulation performance of the entire device.

[0032] Combination Figure 2 As shown, an insulating ring is provided between the first coil and the support bar assembly, and several support bar assemblies are evenly arranged circumferentially along both sides of the insulating ring. The adjustment unit is located on the outside of the main support bar.

[0033] The height of the insulating ring is greater than the height of the support bar assembly, and the heights of the first coil and the second coil are equal to the height of the support bar assembly. This height setting is intended to enhance the rigidity of the entire device.

[0034] This invention boasts high integration and reliability. The adjustment unit is directly integrated into the main support bar, eliminating the need for additional loose parts and the risk of displacement or detachment. The structure is robust, and the insulation performance is reliable. Operation is extremely simple; adjustment is accomplished by simply tearing off the adjustment plate, eliminating the tedious steps of finding and testing shims, significantly improving assembly efficiency and production cycle time. Furthermore, it is highly adaptable, allowing for flexible arrangement of multiple adjustment points at key coil locations (such as ends and transposition points) to adjust the coil's radial profile. This invention solves the problems of poor accuracy, low efficiency, and unreliable performance associated with traditional shim-based coil radial dimension compensation. It achieves uniform distribution of coil radial dimension adjustment and clamping force, improving the assembly quality and efficiency of transformer coils. The device has a compact structure and is easy to operate.

[0035] In operation, the support assembly is placed between the first and second coils, with the fixed surface facing either the first or second coil. When it is necessary to reduce the radial support thickness at this point, the adjusting plate is removed and inserted back into its original position to tighten against the first or second coil, thereby reducing the effective thickness at that point and compensating for coil dimensional deviations. This structure is suitable for large-capacity transformer products such as AC transformers, converter transformers, and reactors with voltage levels of 110kV and above.

[0036] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A large transformer equipped with a thickness-adjustable support bar assembly, characterized in that, include: A first coil, a second coil disposed outside the first coil, and a plurality of support bar assemblies disposed between the first coil and the second coil; The support assembly includes at least two main support bars and an adjustment unit disposed between two adjacent main support bars; the adjustment unit includes at least two detachably connected adjustment plates.

2. A large transformer with a thickness-adjustable support assembly according to claim 1, characterized in that: One side of the main support bar is a fixed surface, and the other side is an adjustable surface. The fixed surface is fixed to the first coil or the second coil, and the adjustable surface is connected to the adjusting unit.

3. A large transformer with a thickness-adjustable support assembly according to claim 1, characterized in that: The regulating plate is made of insulating paper.

4. A large transformer with a thickness-adjustable support assembly according to claim 1, characterized in that: The two adjacent adjustment plates are bonded together with a tear-off adhesive.

5. A large transformer with a thickness-adjustable support assembly according to claim 1, characterized in that: An insulating ring is provided between the first coil and the support bar assembly, and a plurality of the support bar assemblies are evenly arranged circumferentially along both sides of the insulating ring.

6. A large transformer with a thickness-adjustable support assembly according to claim 5, characterized in that: The height of the insulating ring is greater than the height of the support assembly, and the heights of the first coil and the second coil are equal to the height of the support assembly.

7. A large transformer with a thickness-adjustable support assembly according to claim 1, characterized in that: The thickness of the adjustment plate is 1 mm.

8. A large transformer with a thickness-adjustable support assembly according to claim 1, characterized in that: The adjustment unit is located on the outside of the main support bar.

9. A large transformer with a thickness-adjustable support assembly according to claim 1, characterized in that: The main support strip is made of laminated cardboard.

10. A large transformer with a thickness-adjustable support assembly according to claim 1, characterized in that: The main support bar and the adjustment unit are fixedly connected by pressing or gluing.

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