INA bearing replaced the most common methods are of two kinds: direct heating of an acetylene oxygen bearing; another is for small INA bearing uses oil-immersed heating, to thermal expansion, expansion of the bearing diameter, in order to assemble. These methods has been widely applied in the long-term maintenance of equipment, basic met and solved the problem in maintenance of equipment bearing Assembly. But these two methods to ensure bearings heated area in the heating process of temperature values are uniform, it is difficult to determine. Because traditional oxygen acetylene heating is a gas burner and heating process is based on experience, how many degrees were added by heating the bearing temperature right difficult to learn. Too high temperature, annealing on the bearing, lower mechanical properties of INA bearing; temperature is too low, insufficient thermal expansion values, it is difficult to assemble. In repair of equipment, sometimes not bearing heating repairman, INA bearing the correct position on the last resort forced to remove to reload, thus increasing the intensity. To this end, we propose a new method of heating of changing traditional bearing Assembly.
1. electric heating alternative acetylene oxygen heating. Floor furnace design become a cylindrical furnace, named for the bearing for electrical heating, depending on the bearing inner diameter bearings can be designed for different power level and specifications for electrical heating (the best scope above bearing diameter φ 300mm/). This heating device has the following advantages: thermal radiation, steady, heating the bearing surface dust-free, clean, clean, easy measuring and control of bearing temperature.
2. the use of infrared thermometer temperature monitoring on heating the bearing surface. INA bearing Assembly of general control 100 ¡æ ~120 ¡æ heating value. At this temperature, maximum bearing steel thermal expansion values to facilitate bearing Assembly, the temperature value without changing the mechanical properties of the bearing, and high reliability.
To sum up, INA bearing electric warmer than traditional oxygen acetylene heating is to improve the bearing Assembly accuracy and effective methods of work efficiency and reduce labor intensity.



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