| 摘要 |
PURPOSE:To increase the thickness of a varnish layer easily, and to reinforce the insulation of the complete surface of the coil at low cost by applying a high- viscosity varnish after impregnating and making gel a low-viscosity varnish and integrally curing both varnishes. CONSTITUTION:A stator coil 1 is kept at a fixed preheating temperature and inclined and rotated, solenoid valves 6-10 are opened, and the low-viscosity varnish (a varnish A) of excellent impregnating capability in a varnish tank 2 is forwarded by pressure, and dropped and impregnated to the surface of the coil 1 through dropping pipes 3-4. The solenoid valves 6, 7 are closed, and the coil 1 transfers to horizontal revolution. Solenoid valves 13-15 are opened, and the high-viscosity varnish (a varnish B) in a varnish tank 11 is forwarded to dropping pipes 3-4, 12 by pessure. The varnish B is held equally on the surface of the coil 1 while keeping sufficient thickness because it has high viscosity. Both the varnish A and the varnish B are cured and unified, and insulation treatment is completed. |
