The high temperature of the main bearing bush of the mill is a common phenomenon, requiring the user to cool down in time. What factors affect the temperature of the main bearing bush during the use of the mill? There are actually many influential factors. The following Red Star machines will be analyzed for you one by one. 1. The effect of heat generated by friction The hollow shaft and the bearing bush are relatively common in the relative bearing shaft of the mill. It is a common phenomenon that requires the user to cool down in time. What factors affect the temperature of the main bearing bush during the use of the mill? There are actually many influential factors. The following Red Star machines will be analyzed for you one by one. kaiping aida sanitary ware technology co.,ltd , https://www.kpaidafaucets-jm.com
1. The influence of friction on heat The hollow shaft and the bearing bush rotate relative to each Other, and the friction generates heat. Strictly speaking, the heat generated by the oil film between the two is sheared, and the bearing temperature rises, and the value is relatively small.
2. The heat generated by the grinding body when pulverizing the material When the mill is running, the work of grinding the material only accounts for a small part of the total energy consumption, and most of the energy is converted into heat energy and sound energy. When a large amount of heat flows through the hollow shaft or slip ring, the heat is transferred to the bearing bush, which will greatly increase the temperature of the main bearing, and the temperature of the bearing can reach 70~80 °C or even higher.
3, the impact of the type of mill due to the different types of mills, the impact on the temperature rise of the bearing is different. The wet raw material mill is added with slurry, the temperature inside the mill is not high, the minimum greenhouse of the main bearing of the discharge is the lowest, and the main bearing of the cement grinding material is the highest; the drying raw material mill wind sweeps the coal mill in At the same time of feeding, there is still hot air. If the kiln exhaust gas is used to dry the material, the inlet air temperature reaches 350 °C; if the auxiliary hot blast stove is used, the temperature of the inlet gas can reach 450 °C, so that the temperature of the main bearing of the feed is more general. The mill is higher.
4. Influenced by the structure of the mill, a heat insulation layer is arranged between the screw inlet and the discharge spiral barrel (cone sleeve) and the hollow shaft to reduce the heat transferred from the material to the hollow shaft or even the bearing bush. Some mills have a thin insulation layer and some have a thicker insulation layer. For cement grinding and discharging main bearings, it is desirable to have a thicker insulation layer to prevent the transmission of heat insulation.
5, affected by the ambient temperature around the mill The ambient temperature around the mill also affects the temperature of the bearing bush, such as the season, geographical location, and even the degree of ventilation of the workshop, etc., will affect the temperature of the bearing bush.
6, the main bearing cooling water temperature and the amount of cooling water The main bearing water of the mill includes two aspects, one is the water in the main bearing tile, and the other is the water cooling device in the main bearing thin oil station. The water temperature of the cooling water has a large influence on the temperature of the tile, especially the water temperature. Because the water source is different, some plants use river water or lake water, and some use groundwater, so the temperature of the cooling water is different. The water temperature is also affected by the season.
7. Impact of peripheral thin oil stations
The main bearing of the mill has two functions. The first is to supply the amount of oil needed to build a dynamic oil film; the second is to take away excess heat and cool the bearing. Usually, the oil volume of the main bearing forming the dynamic pressure oil film is about 6-10 L/min; in China, 25 L/min is usually used, and some even use 45 L/min, and the amount of lubricating oil required to take away heat is included here.
Through the above analysis, there are many factors that cause the temperature of the main bearing bush of the mill to rise. The Red Star machine reminds the user that during the use of the equipment, attention should be paid from various aspects to properly control the temperature of the main bearing bush. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn