5 ways to design the induction heating coil of the induction heating furnace
1. The inter-turn voltage of the induction heating coil of the induction heating furnace is determined. Generally, the incoming line voltage below 1000Kw is 380V, and the incoming line voltage above 1000kw is 660V or higher, but do not pursue high voltage blindly, the incoming line voltage is as high as A certain degree of insulation is also a problem, and the relationship between high voltage and insulation must be handled properly.
2. The power required by the induction heating coil of the induction heating furnace to heat the blank under the specified productivity can be determined according to the unit power consumption and metal weight: P=GW.
P——The power required to heat the blank to ensure the specified productivity;
G – the weight of the metal to be heated, depending on the size of the blank and the required productivity of the induction heating device (kg/hour);
W——Unit power consumption, the reference value is 0.35–0.41kwh/kg.
3. The length of the induction heating coil of the induction heating furnace is determined according to the length of the heated workpiece and the heating time, which mainly ensures the temperature uniformity and heat permeability of the workpiece during the heating process, and achieves the effect of energy saving. The length of the inductor is generally the length of the workpiece. 5–6 times.
4. The inner diameter of the induction heating coil of the induction heating furnace should ensure that the blank can be put down, the coil insulation and the guide rail for the blank to slide. For the round bar metal heating furnace coil diameter, in principle, it is larger than the diameter of the workpiece by 50-70mm.
5. Water-cooled guide rail in the induction heating coil of the induction heating furnace: The induction heating adopts the heating method of passing the material in the furnace. Therefore, in order to protect the furnace lining, a water-cooled stainless steel wear-resistant guide rail is installed in it. The material is 1cr18Ni9Ti. Longer life.
The above are the precautions for the selection of induction heating coil parameters for induction heating furnaces. Only good induction heating coil parameter design of induction heating furnaces can ensure heating speed and energy-saving heating characteristics.