Method for manufacturing tapered adhesive-free secondary sparsely-wound coil based on wet forming process and tapered adhesive-free secondary sparsely-wound coi

Abstract

The invention relates to a high-voltage pulse transformer secondary coil and a manufacturing method thereof, and provides a method for manufacturing a tapered adhesive-free secondary sparsely-wound coil based on a wet forming process and the coil in view that an existing adhesive-free secondary coil manufacturing process is complicated and long in manufacturing cycle so as to cause low practicability and difficulty in satisfying actual work requirements. The method comprises the following steps: 1) preparing a paper inner cone by the wet forming process; 2) winding a small-diameter winding wire and a spacing line around the paper inner cone to make a coil winding wire intermediate layer; 3) shaping the outer surface of the paper inner cone, specifically, spraying water onto the paper innercone where the small-diameter winding wire and the spacing line are wound for a period of time in order that the outer surface of the paper inner cone is expanded and deformed toward the inner triangular zone between the adjacent turns of the coil winding wire and the spacing line to form a wavy contact surface; 4) removing an elastic band and the spacing line; 5) making a paper outer cone and simultaneously shaping the inner surface thereof; and 6) removing a tapered base cylinder.

Description

technical field [0001] The invention relates to a secondary coil of a high-voltage pulse transformer and a manufacturing method, in particular to a method for manufacturing a conical non-adhesive secondary sparsely wound coil based on a wet forming process and the coil. Background technique [0002] The Russian Sinus series high-voltage pulse generator adopts a compact structure integrating a high-coupling transformer with an open-circuit magnetic core and a coaxial forming line. [0003] Both the primary coil and the secondary coil of the transformer are embedded in the coaxial pulse forming wire; the secondary coil has the characteristics of thin wire diameter and many turns, and is arranged between the inner magnetic core and the outer magnetic core forming the wire. [0004] Commonly used secondary coils use electrical cardboard as the base tube, and use curing glue to wind and fix the thin-diameter wires on the paper base tube. There are tiny air bubbles in the cured ad...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the existing non-adhesive secondary coils, such as complex manufacturing process and long production cycle, which lead to low practicability and difficulty in meeting actual work needs, and provide a cone-shaped non-glue secondary coil based on wet forming technology. The method of sparsely wound coils and the coil are suitable for large-scale coils. Compared with densely wound coils, the paper tube of sparsely wound coils has better structural strength, is not suitable for deformation, and has a longer service life.

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