Self-adhering transposed conductor integral high-temperature bending strength experimental method and apparatus

Abstract

An integral high-temperature bending strength experimental method and a device of self-adhesive transposition wire belong to the field of transformer technology for solving the experimental problems of bending strength at operation temperature. The technical scheme is characterized in that the method can acquire the test results at different temperatures and can calculate the ratio through sample preparation, bending strength experiment, experimental data arrangement, etc. by using the experimental device consisting of a test mechanism and an oil bath tank. The invention can obtain the integral bending strength data of a self-adhesive transposition wire at the operation temperature of a transformer, and the data can objectively and accurately represent the performance characteristics of thermal-bonded enameled wire under operation state, thus providing direct experiment verification of the actual effect of the self-adhesive transposition wire in the transformer, obviating error caused by the unconformity between conventional detection data and actual data and providing accurate basis for transformer design.

Description

technical field [0001] The invention relates to a performance test of transformer raw materials, in particular to an experimental method for detecting the overall high-temperature bending strength of a self-adhesive transposition wire, belonging to the technical field of transformers. Background technique [0002] At present, self-adhesive transposed wires have been widely used in transformers. Large-scale transformer windings are coated with insulating varnish with adhesive force on the outer layer of each transposed wire. After the insulating varnish is dry, dozens of transposed wires can be bonded into one body. It is used to enhance the overall strength of the coil after the transposed wire is made, prevent the coil from deforming when the transformer is impacted by current, and improve the stability of the transformer operation. Conventional technology holds that self-adhesive paints do not change much in their properties after drying, but new research has found that i...

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Problems solved by technology

In fact, because the transformer operates at a certain temperature, the operating temperature of the transformer is much higher than the room temperature. As the temperature rises, the bonding performance of the transposition wire changes, resulting in a change in its bending strength. Therefore, at room temperature Routine test data cannot accurately reflect the bending strength of the transposed wire at the operating temperature of the transformer

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