Study on the self-adhesive coil axial force experiment

The current manufacturing self-adhesive coil transposition wire has been widely applied to the coil of large power transformer, self-adhesive coiltransposition wire self-adhesive film mainly for epoxy paint. Selection of coilself-adhesive transposition wire manufacturing has a good ability of anti short circuit, and mechanical strength than the non sticking wire can be improved significantly.

But for self-adhesive coils through the strength of axial compression after drying, because the experiment as destructive test, no data has been, wecreated three different types, different coil diameter, not the same gauge for the manufacture of the experiment, used for axial compressive strengthverification coil and get data. The experiment in the limit pressure of 200thydraulic machine, specific process is as follows: 1 the experimental process in order to eliminate the influence of shock and acceleration of the data, before the experiment, hydraulic press oil cylinder lifting speed reduction of speedregulation, after repeated testing, the final velocity is adjusted to about 60mm/min, the speed is the minimum speed of lifting oil cylinder of hydraulic machine.

Three self-adhesive coils before the experiment have been manufactured in accordance with requirements of conventional transformer through the oven drying and oil immersion treatment. The 1.1 coil coil as pierce shieldingcontinuous structure, line pie radial scale 106mm, the coil axial height 1978mm, wire for paper packet self-adhesive transposition wire, shape scale of 31.56*17.92. Before the compression coil are placed at each stays lowerpressing block, because the pressure head structure problems of hydraulic machine, the upper end of the coil to be placed in ordinary pressing plate,

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