What should we pay attention to in the energy-saving transformation of cooling fan of cold rolling mill


With the slowdown of demand growth in the iron and steel industry, the iron and steel industry is facing common problems such as overcapacity and environmental protection. Therefore, it is necessary to promote energy-saving production in the iron and steel industry through energy conservation and emission reduction, energy management, process optimization and other measures. The application of energy-saving transformation in cold rolling production line is analyzed, The power and energy saving consumption of cold rolling mill production line must start from two aspects of technology and management, so as to save power and improve power efficiency.
The current variable speed control can be used to reduce the energy loss caused by the long-term operation of the full load cooling fan. Practice shows that when the lubricating oil is very clean, that is, when the lubrication state of the bearing is the best, the bearing can resist fatigue. However, the bearing is in the state of mixed friction. In most cases, friction will occur on the rolling working surface of the bearing, However, enough lubricating oil cannot form a complete oil in film state, and more impurities contain lubricating oil. The greater the friction mixing, the better the lubrication state. On the contrary, the worse it is, the lower the service life of the bearing will be.
In the past, due to the speed limitation of the rolling mill, the support of the two rollers and roller bearings of the lubricating oil film dynamic pressure bearing is usually thin, so that the high-precision bearing has low roughness of the raceway surface, which can maintain the continuity of the oil film, better and better lubrication. Therefore, the precision bearing is selected for use. If the design and manufacture of the bearing housing are incorrect, It will lead to uneven power of the rolling mill and shorten the service life of the bearing.
The load area of the bearing pedestal must have sufficient wall thickness, generally not less than 1 / 3 of the bearing diameter. The bearing pedestal must be self-aligned to avoid eccentric load of the bearing due to roll deflection. The curtain of the installation frame shall be used as the base to keep the axis of the bearing housing parallel. Check whether the cylindricity of the bearing housing hole meets the requirements and ensure that the bearing is in good tension.


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