How can we properly prevent the heating of the crusher bearings?
Pulverizer bearings are mainly used to support the rotor to do rotational movement, high-speed rotation of the bearings will generate a lot of frictional heat, which requires bearings in the manufacture of a fairly high degree of finish, try to avoid overheating of the bearings due to friction, resulting in accidental damage and other accidents. How to prevent the crusher bearings from heating up? In practice, bearings are adapted to a variety of rotary support movements, bearings in the crusher used to connect the motor and rotor, rotor and hammer blade, especially in the crusher hardness of the material, the need to increase the speed to produce a large impact. Bearings appear overheated and high temperature for several reasons. 1, bearing surface roughness was destroyed, bearing surface is smooth, roughness can generally reach 1.6, other different according to demand, roughness will also be different, if the roughness was accidentally broken, the height of the two bearing seat is uneven, or motor rotor and crusher rotor is not the same center, will make the bearing was subjected to the impact of additional load, thus causing the bearing overheating. This situation, to immediately stop the troubleshooting, you can avoid early damage to the bearing. For example: scratched by metal, and other parts of the collision, etc., will make the bearing rotate with increased friction, and thus heat. 2, bearing lubricating oil in too much, too little or aging is also the main cause of bearing overheating and damage, therefore, according to the use of the use of the book requirements on time and quantitative filling of lubricating oil, general lubrication accounted for 70-80% of the bearing space, too much or too little are not conducive to bearing lubrication and heat transfer. Lubrication maintenance measures are not in place, the bearings must be lubricated for a long time work, generally lubricated at each start, the bearings to extend its service life. 3, feeding too much material, which is mainly due to the feeding device feeding speed is not well adjusted, a feeding volume is too much, the crusher processing capacity is too small, can not do the crushing process in a timely manner, clogged in the crushing chamber, the rotor resistance increases, resulting in bearing overheating. 4, long-term overload work. Usually to catch up, in high-intensity production, the crusher does not get timely maintenance, it will continue to heat up, and will seriously fracture. 5, the bearing cover and shaft fit too tight, the bearing and shaft fit too tight or too loose will lead to bearing overheating. Once this problem occurs, in the operation of the equipment, it will make a grinding sound and obvious swing. Should stop to remove the bearing, repair the friction parts, and then reassemble as required. Solution. General bearing roughness once destroyed, this bearing should be replaced immediately, there is no possibility of re-use. Secondly, do a good job of bearing periodic maintenance and lubrication work, try to avoid a long time high-intensity production. Finally, arrange the production process, according to the crusher output, control the feed rate and reduce the amount of feeding.
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