Aluminum Shell Induction Furnace
Aluminum Shell Medium Frequency Induction Furnace consists of Furnace body, Reducer & supporting device, Water-cooled cables, Control panel, Capacitor Box.
1) Induction coil
The induction coil is in the heart of the entire induction furnace, induction coil from the intermediate frequency power supply generates a powerful magnetic field under the influence of medium-frequency voltage, current, the magnetic metal inside the furnace and eddy current heating coil is the critical power conversion of thermal energy. Coil design, so it is essential for the gifted, the furnace coil is a combination of domestic and foreign intermediate frequency furnace actual use, according to the electromagnetic theory, the preferred option through accurate analysis and calculation determined.
An induction coil with copper pipe
To guarantee the reliability of the induction coil, induction coil used the brand for T2 (purity electrolytic copper 99.5%), 5000KG furnace wall thickness using 6㎜ extrusion rectangular copper pipe on the special die winding and become, it not only ensures the coil rigid and has the most conductive section. The density of copper pipe, pipe wall thickness. Induction coil when the design considering the influence of the inherent and length of copper pipe, the copper pipe welds and electricity, water diversion area, make each group of induction coil inside without welds.
Induction coil of the exterior insulation adopts the binary forms, the inner coating by electrostatic spraying process with a high-strength insulating resin. Then use the class H class insulation paint leaching paint dry.
Induction coil by welding outer circumference series bolts and insulation stay fixed. After the loop is fixed, its turn spacing error is not more than 2 mm. All the countersunk head bolts, in order to improve the dielectric strength
Induction coil welding is made of the silver electrode, does not affect the current liquidity.
2) Furnace frame: composed of primary aluminum and magnesium alloy casting
Furnace frame by two pieces of aluminum semicircle casting furnace. Also, the surface of the upper two pieces of aluminum casting furnace with middle asbestos board, insulation board, and the self-contained stainless copper wire rod, asbestos plate with heat and blocking current generating circuit to make aluminum furnace heating effect, insulation board with insulation and tighten sensors column does not move, make the whole aluminum shell furnace is strong and durable.
Furnace frame part reserved when the design safety coefficient. Ensure furnace frame has sufficient strength, carrying the maximum charge run smoothly. Angle is greater than 95 degrees.
Reducer & Supporting device
Using RZS type reducer. RZS type reducer for especially dedicated reducer, it is mainly used for medium frequency melting furnace, high-temperature furnace automatically dumping operations, mechanization in advance, to ensure the quality of casting to reduce labor intensity and improve productivity play an important role, also can be used for automatic welding, automatic, automated assembly line workpiece transposition etc. Turn the operation requirements.
RZS reducer is the critical product electric furnace overloading, and this product is a secondary drive worm gear and worm reducer, RZS631, input power respectively 3.5kw, this product has small volume, large speed ratio, transmission self-locking, low noise advantages. RZS631 equipped with the manual and electric control device, electrical control with tilting furnace control box contactor three phases electric conversion control motor and reversing a tilting furnace oven, with extension and handle button control. Manual operation, pull a hand wheel and worm gear off the first grade, and movement to secondary worm reducer directly by the handwheel to by the second worm gear drives the output shaft. This product is convenient for installation and commissioning.
Steel Shell Induction Furnace
Steel Shell Medium Frequency Induction Furnace consists of Furnace body, Hydraulic station, Water-cooled cables, Control panel, Capacitor Box.
It is adopting steel shell magnet yoke hydraulic transmission structure. It consists of the furnace fixed frame, furnace frame, induction loop, magnet yoke, refractory material, pouring device, water cooling cable.
About the induction coil, this is the key part of the induction furnace. Use reliable and durable high conductivity copper to make, the upper and lower layers of the parallel winding system. Both ends installed the water ring short circuit ring, the induction coil’s surface brush a coat of high-temperature insulating paint, the maximum to avoid the furnace shell fever.
The induction coil is the heart of the whole furnace, which not only directly affects the absorption of the furnace power, its design rationality, and quality also directly affects the lifetime of the lining. The sensor is fixed by the number of bolts and insulated bars in its outer circumference. The upper and lower parts of the loops are installed water-cooled rings, and the purpose is to make the lining material in the axial heating evenly to extend the lifetime of the lining.
Main characteristics of our made induction loop.
A. In the structure, we adopt advanced short-circuit designing. Eliminate the medium frequency furnace’s components of the fever.
B. The traditional designing of induction coil – lining produces weak electromagnetic mixing power. So brushing the bottom of furnace severely, now adopting extended circles to increase the electromagnetic power to improve the lifetime of lining.
Medium frequency power supply
Can control medium frequency power supply is AC-DC-AC device. Using thyristor components can change three-phase AC power supply into a single – phase AC power supply. Medium frequency power thyristor rectifier KP and inverter KK thyristor uses the series-parallel connection. Layout cabinet is an easy installation, maintenance, and commissioning. Cooling method adopts water and air cooling.
Each medium frequency power cabinet has two parts: the rectification system and inverter system.
1) Medium frequency power supply (rectification system ) ： automatic air circuit breaker, Fast Fuse, Current Transformer, Line Inductor, and Rectifier KP, etc.
2) Medium frequency power supply (inverter system ): Inverter KK, the main control board, commutation inductance, filter reactor…
Filter reactor: reactor, also known as inductance, consists of iron core and water-cooled coil. The filter reactor is installed outside the cabinet and it is connected between the output DC bus of the medium frequency power supply (rectification system) and the input DC bus of the medium frequency power supply (inverter system) through the water cooling cable to stabilize the output voltage and reduce the interference that medium frequency voltage brings to network voltage .
The most significant feature of the reactor made by our company is having a large amount of inductance. So the stability of the electrical system is superior to similar manufacturers; higher harmonic components are lower than comparable products.
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