Rolling mill bearing lubrication and seal
Most favorable price : sales@hellerbearings.com
The rolling mill bearings are lubricated by grease lubrication and oil and gas. Most manufacturers are now used lubricating grease lubrication easy way, if possible take the oil-gas lubrication technology, can make the rolling mill bearings under the working conditions in the ideal lubrication, can greatly cut down the consumption of bearing.
1, grease lubrication
Grease lubrication of the method is simple, easy to roll the characteristics of easy to change, is widely applied. Should be according to the working temperature of rolling mill bearing, speed, rolling force and seal waterproof performance, and the size of the impact vibration, for fat method, and so on and so forth to choose appropriate grease. To use high temperature resistant, strong viscosity, good extreme pressure performance and water resistance of high normal manufacturer of grease. According to the features of rolling mill bearing should choose ep additives in 2 #, 3 #, lithium base grease or polyurea grease.
Although high-performance grease procurement cost is high, but less dosage, bearing life long, the overall comprehensive cost is reduced. Additional the filling quantity of the grease must right amount and fill in place, different type of grease can not mix, make rolling mill bearing working surface is always in a state of oil film is normal.
2, the filling amount of fat
To fill bearing internal space filling grease for the first time, the vertical roll or diagonal roll in each bearing seat cover up and down to fill enough grease. To check whether the grease is hardening after each roll change black, whether the impurity contamination, whether oxidative emulsion. If the above condition should be thoroughly change the grease and check the seal and seal structure change in time or improve; If the condition is good can continue to use after added new grease.
3, lubricating oil and gas
Oil-gas lubrication is the ideal lubrication bearing, bearing at work every once in a while internal compressed air with lubricating oil drops into the bearing, lubricating oil in the bearing, heat away from the air bearing, at the same time to prevent external water vapor impurities in bearing inside. Oil has not been atomized will not pollute the environment.
4, sealing device
Bearing seal is to keep the internal good lubrication condition, and prevent the cooling water, iron oxide, prolong the service life of bearing surface impurities in work. Bearing damage due to the rolling mill bearing seal is near the roller side parts, bearing often because grease pollution, erosion, wear, peeling, and even make the parts work surface fracture, especially in cold strip rolling emulsion infiltration, disable grease faster.
Bearing the seal of own seal and external seal divides into two kinds. By adopting the combination of labyrinth and contact the main external sealing design. Maze the more level (not less than the poles) the smaller the gap sealing effect is better. Radial labyrinth clearance according to the size of the bearing size take unilateral 0.6 ~ 1.5 mm; The axial 4 ~ 6 mm.
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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Rolling mill bearing working performance can be effectively used, a considerable degree depends on the lubrication condition, the lubricant is referred to as "bearing the fifth largest parts". Damage reasons of rolling mill bearing more than 40% was caused by poor lubrication, so to reduce consumption of rolling mill bearing, we must choose suitable for the conditions of use of the lubrication methods and high-quality lubricants, design and installation to prevent water and scale and other foreign matter invasion and reliable sealing device.The rolling mill bearings are lubricated by grease lubrication and oil and gas. Most manufacturers are now used lubricating grease lubrication easy way, if possible take the oil-gas lubrication technology, can make the rolling mill bearings under the working conditions in the ideal lubrication, can greatly cut down the consumption of bearing.
1, grease lubrication
Grease lubrication of the method is simple, easy to roll the characteristics of easy to change, is widely applied. Should be according to the working temperature of rolling mill bearing, speed, rolling force and seal waterproof performance, and the size of the impact vibration, for fat method, and so on and so forth to choose appropriate grease. To use high temperature resistant, strong viscosity, good extreme pressure performance and water resistance of high normal manufacturer of grease. According to the features of rolling mill bearing should choose ep additives in 2 #, 3 #, lithium base grease or polyurea grease.
Although high-performance grease procurement cost is high, but less dosage, bearing life long, the overall comprehensive cost is reduced. Additional the filling quantity of the grease must right amount and fill in place, different type of grease can not mix, make rolling mill bearing working surface is always in a state of oil film is normal.
2, the filling amount of fat
To fill bearing internal space filling grease for the first time, the vertical roll or diagonal roll in each bearing seat cover up and down to fill enough grease. To check whether the grease is hardening after each roll change black, whether the impurity contamination, whether oxidative emulsion. If the above condition should be thoroughly change the grease and check the seal and seal structure change in time or improve; If the condition is good can continue to use after added new grease.
3, lubricating oil and gas
Oil-gas lubrication is the ideal lubrication bearing, bearing at work every once in a while internal compressed air with lubricating oil drops into the bearing, lubricating oil in the bearing, heat away from the air bearing, at the same time to prevent external water vapor impurities in bearing inside. Oil has not been atomized will not pollute the environment.
4, sealing device
Bearing seal is to keep the internal good lubrication condition, and prevent the cooling water, iron oxide, prolong the service life of bearing surface impurities in work. Bearing damage due to the rolling mill bearing seal is near the roller side parts, bearing often because grease pollution, erosion, wear, peeling, and even make the parts work surface fracture, especially in cold strip rolling emulsion infiltration, disable grease faster.
Bearing the seal of own seal and external seal divides into two kinds. By adopting the combination of labyrinth and contact the main external sealing design. Maze the more level (not less than the poles) the smaller the gap sealing effect is better. Radial labyrinth clearance according to the size of the bearing size take unilateral 0.6 ~ 1.5 mm; The axial 4 ~ 6 mm.
