Production process of wedge-shaped cushion block of oil immersed power transformer

Abstract

The invention discloses a production process of a wedge-shaped cushion block of an oil immersed power transformer. The production process comprises the process steps of calculating associated sizes of the cushion block, selecting a laminated paper board material, processing a bevelling groove, machining with a numerical control machine, polishing an edge angle and the like. In the production process, theoretical calculation and numerical control machine machining are combined; the process route is reasonable; the automation degree is high; and the production efficiency is further improved. The wedge-shaped cushion block produced by the production process is used for filling a transposition air gap, so that insulating structural performance of a transformer winding and a transformer are effectively improved, the electric appliance performance, such as short-circuit resistance and the like, of the winding are guaranteed, and the running of the transformer is safer and more reliable.

Description

Technical field [0001] The invention relates to a production process of a wedge pad for transposition of winding wires of an oil-immersed power transformer. Background technique [0002] For the large gaps similar to the “scissors” openings generated when the transformer winding wires are transposed, the current transformer manufacturers use multilayer paper pads (the thickness of single-layer paper pads is generally 1.0mm) to fill, that is, according to the winding winding During the manufacturing process, the actual shape of the gap created by the transposition of the wire is filled by the operator with a paper pad. Since the whole process of this structure is manual operation, it has the following disadvantages: [0003] 1. The size of hand-made fillings is not easy to control, so the filling effect cannot be guaranteed. [0004] 2. The winding transposition transition of this structure is not smooth, and the transposition quality of the winding wire cannot be guaranteed. [0005...

AI Technical Summary

Problems solved by technology

[0003] 1. The size of the handmade filler is not easy to control, resulting in the inability to guarantee the filling effect

[0004] 2. The winding transposition transition using this structure is not smooth, and the transposition quality of the winding wire cannot be guaranteed

[0005] 3. There are a lot of sharp corners in the handmade filling, which is easy to cut the winding wire insulation

[0006] 4. The handmade filler has a loose structure and cannot provide skeleton support for the winding wires

[0007] Due to the existence of the above shortcomings, it not only reduces the structural performance of the transformer winding and body insulation, but also reduces the electrical performance such as the short-circuit resistance of the transformer.

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