NTN bearing lubrication is implemented during the planned equipment shutdown and Ntn Thrust Ball Bearings supplemented regularly. At the same time, the old grease is removed or squeezed out through the oil drain air.
Wipe the grease nipple clean before adding fresh grease. If there is no oil nozzle in the bearing box of Ntn Thrust Ball Bearings thrust ball bearing, open the bearing box cover or end cover to take out the old grease. After cleaning, add fresh grease of the same model.
In order to ensure the normal Ntn Thrust Ball Bearings operation of NTN bearing, we need to regularly check the oil level and oil quality of lubricating oil. Generally, the normal oil level should be within 1 / 3-2 / 3 of the equipment oil level window or mark. The oil replenishment mode is the oil cup,
and the displayed oil level only represents the oil replenishment capacity, while the oil level of the Ntn Thrust Ball Bearings bearing box meets the operation requirements. If the oil level in the oil cup is lower than 1 / 4 of its total volume, oil replenishment can be considered.
1. Low temperature high speed bearing grease
At present, the equipment using thrust ball bearings is becoming more and more sophisticated, Ntn Thrust Ball Bearings which makes the grease used in the bearings must have the following properties:
(1) It has the same operating life as the bearing, so as to prolong the maintenance cycle, shorten the shutdown time and improve the labor productivity.
(2) When DN > 5 × Under the high speed of 105, ensure the low temperature rise of the motor without oil rejection, so as to reduce power consumption and protect the motor.
is controlled under a certain standard to greatly reduce the Ntn Thrust Ball Bearings environmental pollution caused by equipment noise.
(4) Under ultra-low temperature working conditions, ensure the flexibility of bearing starting and operation, and ensure low output power.
2. Universal low noise motor bearing grease
In the NTN bearing industry, this kind of grease is widely used, Ntn Thrust Ball Bearings accounting for about 70% of the total grease consumption. Because this kind of grease uses lithium soap with soft fiber and easy filtration as thickener and mineral oil as base oil,
it can easily meet the requirements of reducing vibration value of medium and low-grade thrust ball bearings. Another advantage is that it has good pumping performance. Whether it is mechanical Ntn Thrust Ball Bearings fatliquoring or manual fatliquoring, it is simple and easy.
3. High temperature long life low noise bearing grease
The grease used in high temperature and high speed environment shall have the following characteristics:
(1) No loss at high temperature, i.e. maintain a certain consistency at about 180 ℃ without softening.
(2) Less grease leakage. When the grease is subjected to high-frequency repeated shear and great centrifugal force in the bearing, the lubrication can flow back to the raceway in time without being thrown out.
(3) It has a certain mute effect. Because the fiber of high- temperature grease is generally Ntn Thrust Ball Bearings hard, the mute performance in the noise test of thrust ball bearing is far inferior to that of lithium grease.
(4) This kind of grease should have a certain high-temperature service life and good oxidation resistance at high temperature, so as to prolong the service life of NTN bearings and related equipment.
Use the oil bath lubrication system. If the oil temperature is below 60 ℃ (140 ° f) and the lubricating oil is not polluted, replace the lubricating oil once a year. If the oil temperature is 60-100 ℃ (140-210 ° f), the lubricating oil needs to be changed four times a year.
If the oil temperature is 100-120 ℃ (210-250 ° f), the lubricating oil needs to be changed once a month. If the oil temperature is above 120 Ntn Thrust Ball Bearings ℃ (250 ° f), the lubricating oil needs to be changed once a week.
Proper installation and maintenance is an important factor for the normal operation of NTN bearing. At the same time, attention must be paid to maintaining the cleanliness of thrust ball bearing. The bearing must be protected from contamination by pollutants and moisture, and must be correctly installed and lubricated.
In addition, the design of bearing arrangement, the condition of oil seal, the form and replacement cycle of lubricant and special maintenance also play an important role, which must be paid attention to.