Reduce the slipper mill bearing temperature several measures

Reduce the slipper mill bearing temperature of several measures - 2020 09 - 16 Chen Xiangjiu ( Zhumadian henan dragon tongli cement co. , LTD. ) A company of 5000 t/d production line of cement mill adopts & Phi; 4. 2 m× 13 m slipper grinding, since its launch in 2005, the mill tile has high temperature, tile spin out side temperature higher than the screwing in side, end is higher than grinding head end. In March 2011 to mill taken several technical transformation measures. A slipper, problems and analysis support structure as shown in figure 1. Figure 1 slipper support device structure schematic concentrated continuous forced lubrication, lubrication of to load industrial gear oil in the lubricating oil varieties using N460, jump stop temperature 70 ℃. The cause of the problem are as follows: ( 1) Spin out side tile oil from low to high, with less oil, the oil film is thinner. ( 2) Material from the grinding head to tail is more and more hot, grinding mill tail lining heat preservation material was taken away by the wind, internal heat transfer to the grinding end slipper faster and faster, lead to tile temperature increase. ( 3) Grinding end slipper and tile inside plywood with friction, tile local temperature rise has also increased. ( 4) Tile cooling water flow not free, the backwater valve core, tile heat cannot take away in time, is also one reason for the tile temperature is higher. In the grinding PC32. 5 when cement tile at about 67 ℃ temperature, grinding PO42. 5 when cement rose to 73 ℃. In order to maintain production, jump stop temperature to 74 ℃. Second, the improvement measures, 1) Under the slipper increase 2 oil basin, its structure is shown in figure 2. Slipper in a small number of oil into the oil basin, one is the local cooling slipper, 2 it is slippery track a certain amount of oil to spin out side of the tile, to form the oil film is better. Figure 2 oil basin ( 2) In tile grinding end spin out side and inside of the clamp installed between a 3 mm thick steel plate, On the steel plate surface is lower than the tile surface 2 mm) , the effect is to increase the slipper with splint gap between the mill in the operation of the slipper friction inside plywood, not as shown in figure 3. Figure 3 grind tail tile parts ( 3) Grind tail lining insulation material high temperature resistant fiber felt by foam asbestos board instead, the key to this work is to put the seal plate weld, weld to eliminate voids and porosity. ( 4) Replace the cement grinding system supply and return water pipe valves, slipper bearing cooling water waterways are clear. After three, effects, through the statistics, technical renovation, screwing in side tile about 5 ℃ temperature drop, spin out side tile temperature drops 8 ℃ or so, the effect is good, for the slipper laid the foundation, to the safe operation of grinding machine for grinding high cement created the conditions. （ Source: China cement spare parts network)