Heat bonding enamelling wire high-temperature bond strength experimental method and device

Abstract

A high-temperature bonding strength experimental method and a device of thermal-bonded enameled wire belong to the field of transformer technology for solving the experimental method of bonding strength of enameled wire. The technical scheme is characterized in that the experimental device consists of a tension test mechanism and an oil bath tank containing silicone oil, and the desired detection data can be acquired by sample preparation, bonding strength experiment, experimental data arrangement, etc. The invention also designs a device special for the experiment. The invention can obtain bonding strength data of thermal-bonded enameled wire under the actual operation condition of a transformer, and the data can objectively and accurately represent the performance of the thermal-bonded enameled wire under the work condition, which provides direct experimental verification of the actual effect of thermal-bonded enameled wire in transformer. The invention can obviate the error resulting from the unconformity between conventional detection and actual data, and provide accurate basis for transformer design. The invention has strong operability, simple device structure and easy implementation.

Description

technical field [0001] The invention relates to a performance test of transformer raw materials, in particular to a method for testing the high-temperature bonding strength of thermally bonded enamelled wires, belonging to the technical field of transformers. Background technique [0002] At present, the transposition wire made of thermally bonded enameled wire has been widely used in transformers. Its adhesive performance is used to enhance the overall strength of the coil after the transposed wire is formed, and to prevent the coil from deforming when the transformer is impacted by current. Improve the operation stability of the transformer. The current general method for the bonding strength test of thermally bonded enameled wires is to carry out at room temperature. The experimental data can only reflect the bonding performance of enameled wires at room temperature, and there is no experimental data on how the adhesiveness changes with the increase of temperature. In fa...

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Problems solved by technology

In fact, because the transformer operates at a certain temperature, and its operating temperature is much higher than room temperature, as the temperature rises, the performance of the bonding paint layer of the thermally bonded enameled wire will change greatly, and these changes will lead to The mechanical properties of the transposition wire change, so the routine test data at room temperature cannot accurately reflect the bonding strength data of the thermally bonded enameled wire at the operating temperature of the transformer, and the design of the relevant parts of the transformer based on these data will inevitably produce certain problems. error

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