1. Lubricating oil;
Thin oil lubrication of the bearing components, should use # 20 or 30 # engine oil; Grease lubricated bearing assemblies, # 2 or # 3 lithium base grease should be used, add the quantity to fill the bearing keep overhead when 2/3 to 3/4 advisable, grease can not add too much, lest cause bearing heating.
2. Bearing temperature;
Bearings and shaft should be hot charging, bearing heating temperature should be less than 120 ° C. Bearing parts (such as the roll body, race, etc.) the use of temperature shall not exceed 120 ° C, the temperature at which the work is not easy to measure, but this part generally monitor the bearing temperature, with the external surface of bearing in the bearing body temperature shall not exceed 75 ° C.
Pump at runtime (especially new bearing runtime) to detect bearing running noise and temperature, such as abnormal sound or bearing temperature rise sharply and the contents of each bearing body bearing in appearance temperature greater than 75 ° C, should immediately stop overhaul, if bearing raceway and rolling body has no obvious damage, should pay attention to the bearing cage for wear and tear when cage wear not badly, but bearing after cleaning, can be reassembled, or to replace new bearing.
3. The bearing clearance
Inherent bearing clearance have a plenty of bearing, such as short centripetal ball bearings, cylindrical bearings, double row self-aligning bearings to the heart, etc., of these bearings bearing components, general maintenance didn't consider its clearance problems; When bearing component is composed of single row circular cone roller bearings, the bearing clearance is in the assembly bearing components with axial clearance to ensure; I plant the production of slurry pump in A, B, C, D, E, F, G bracket with the bearing components, are composed of single row circular cone roller bearings, the axial clearance listed in the following:
Bracket form F, G
Clearance mm 0.05 0.15 0.1 0.2 0.15 0.25 0.15 0.28 0.4 0.6 0.5 0.4
When the bearing components with double row circular cone roller bearings, the bearing axial clearance is inherent, but hours axial clearance, also can cause bearing heating, perhaps even burned bearing, so this kind of bearing before use to check the axial clearance, recommended the axial clearance list below, when bearing the original clearance is less than the value in the table below, can be in bearing the isolation between the two inner race mat mat a thin copper sheet again, in order to achieve the following table to the value of the advisable.
Bracket type PV, QV R, RV SV, S, ST T, TU 565 ap 743 a to 760 a
Shaft seal water l/s (0.15 0.2 0.21 0.15 0.3 0.35 0.3
In addition, the axial clearance of double row tapered roller bearing is made, must be set to use, does not allow parts to swap. |