Features of Electromagnetic Induction Bearing Heater

Since the induction heating power supply was first applied in industry, there has been significant development in both the theory and the equipment of induction heating. The application scope of induction heating has also expanded, becoming increasingly widespread. The bearing heater utilizes the induction heating principle to heat and assemble components such as bearing bushes, gears, couplings, and diameter rings, which are ring-shaped or tubular, causing them to expand upon heating to meet the requirements of interference fit assembly. It features the following characteristics:

High-speed and efficient induction heating for bearing heating is achieved through direct heating by induced eddy currents. Energy transfer is conducted via electromagnetic waves, resulting in minimal external interference and energy dispersion. Consequently, the workpiece can be heated to the desired temperature in a short period, exhibiting notable characteristics of rapid heating and high efficiency that are unattainable with conventional indirect heating methods.

2. Save electrical energy and reduce energy consumption, for instance: The rapid heating of workpieces using coal, petroleum products, or natural gas not only causes serious environmental pollution but also, due to the fact that most factories do not recover waste heat, the thermal efficiency is approximately 8%-20%. If induction heating is used, the thermal efficiency can reach over 40%.

3. High-quality heating of bearing heaters during indirect heating in general furnaces often results in severe oxidation and decarburization of the parts or blanks due to slow heating speed and long heating times. If heated too quickly, a significant temperature difference between the surface and core may cause severe thermal stress, leading to part deformation or cracking. Extended heating times can also lead to excessively large grain growth (referring to forging heating), posing difficulties for subsequent heat treatment and potentially resulting in adverse consequences. Some of these issues are challenging to overcome. However, with induction heating for bearings, both heating time and temperature are easily controlled, ensuring minimal temperature differences. This is beneficial for improving quality, increasing yield, and profitability, as well as significantly enhancing heating quality.