Epoxy Resin Vacuum Casting Equipment for Transformer
Introduction: This is mainly sued in resin impregnation and envelopment of electric appliance coils. The application objects include transformer, reactors, instrument transformers, high voltage insulation pieces, high voltage cable connectors, discharge coils, ignition coils, motors, electric welding machine, nuclear power actuator drive motor, magnetic suspension train long stator, Tokamak nuclear fusion low-temperature full superconducting coils.
Equipment technical parameters and instructions
Pouring tank size Φ2800×3500mm
Pumping speed of the main pump of vacuum system 600L/S
Working temperature of the pouring pot 70~85ºC
Limiting vacuum degree of pouring tank (cold, empty) ≤20Pa:High vacuum degree is beneficial to the dehydration and dry of 35 kv transformer coil ,
To ensure the electrical properties of the transformer.
Leakage rate of pouring tank ≤50Pa.L/s Working vacuum degree of pouring tank 100~300Pa:Equipment match pouring tank vacuum automatically,Prevent the splash when pouring, produce bubbles.
Working pressure of pouring tank Atmospheric pressure ~0.6MPa
Material vacuum suction directly from the inlet of mixing tank
This equipment is accurate measurement system:When high viscosity premix pump delivery the resin, curing agent premix to final mix tank ,Components in the electronic measuring system, under the control of PLC to realize precise measurement,Throughput is less than 30 kg,error is less than + / - 0.3 kg,When throughput is greater than or equal to 30 kg, the error is less than + / - 1%.
This equipment adopts dynamic blender mixing material.
This equipment adopts the vacuum pouring process method: without a deflated.
This equipment has the PLC program control and manual intervention control mode.
Automatic recording material tank, pouring pot,mold temperature and vacuum degree,
Can be preset ingredients for the burdening.
Each mixing tank adopts electric heating,water as a heat transfer medium,automatic temperature control;All material tube adopt water jacket heating;Pouring pot adopts the electric hot plate for direct heating,uniformly distributed on the surface of vacuum pouring tanks.The heating part adopts rock wool insulation,The pouring tank is armoured by the stainless steel thin plate,the mixing tank is armoured by thin steel plate,surface coating.Temperature of outside surface of thermal insulation layer is not higher than the room temperature 15 ºC.
Degassing method of vacuum stripping tank:Built-in thin film degassing method.Liquid material from the bottom of the tank by rotating screw ascend to the top of the umbrella of the degasser,High pressure liquid material at the bottom decompression at the top of the umbrella ,flow downward along the surface of the umbrella to form a liquid film,exposure in a vacuum,inside bubble expansion, broken,bubbles discharge by vacuum system.This way can effectively all the materials including high pressure liquid at the bottom of the tank degassing thoroughly.Since then after degassing process, until completion of the casting, resin, curing agent is no longer exposed to the atmosphere.
Vacuum mixing tank vacuum degree of work curve is controlled by PLC, to prevent the pressure is too low, material expansion, evaporating into the vacuum system.
Equipment power: 180 kw / 380 v, three-phase five line, 4 Ω grounding resistance, covers an area of: 10 meters wide by 7.5 m vertical x 6 meters high
Equipment ground operations.Equipment preparation tank on the ground
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