How to choose the rolling bearing FAG6209-TB-P6-C3SKF6314m/C4VL0241NSK6326ZSSC3NS7S5?
Lubricant selection and lubrication method of rolling bearing are related to bearing type, size and working conditions. Usually rolling bearings are lubricated by grease or oil, and solid lubrication can also be used under special conditions. Among grease lubrication and oil lubrication, grease lubrication is the most, about
80% of rolling bearings are lubricated with grease.
1. Characteristics of grease lubrication
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1) advantages
Answer: The lubrication device is simple. If sealed bearings or unsealed bearings that do not need to be replenished with grease are used, no additional lubricating device is needed (on the contrary, the oil lubrication system needs oil pump, oil pipe, oil tank, etc.). ).。
B: Grease is not easy to leak, and the sealing structure of the bearing is relatively simple.
C: bearings are easy to maintain.
D: Grease has a sealing function, which can prevent external impurities such as dust and moisture from entering the bearing.
E: It is easy to improve the cleanliness of mechanical equipment.
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2) Disadvantages of grease lubrication:
Answer: Bearing friction is large, heat dissipation is poor, and the allowable speed is relatively low.
B: the dn value of grease-lubricated bearings usually cannot exceed 3×105 mm r/m n. ..
C: At high temperature, the base oil of lubricating grease will accelerate evaporation and oxidation deterioration, and the colloidal structure of lubricating grease will also change, thus accelerating oil separation.
Whenever the bearing temperature rises.
When the temperature is 10℃- 15℃, the life of grease will be reduced by 1/2. Except for special high-temperature grease, ordinary grease cannot be used at high temperature.
2. The characteristics of oil lubrication
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1) advantages
A. suitable for high-speed rotation
B it has good high temperature stability and is suitable for use at high temperature.
C. The friction heat inside the bearing can be taken away, and the heat dissipation is good. When the ambient temperature of the bearing is high, oil lubrication can play a cooling role.
It is easy to remove the wear particles and dust inside the bearing.
E it can share lubricant with parts around the bearing (such as gears) for daily lubrication.