Relubrication of bearings is best carried out during planned equipment downtime and replenished regularly. At the same time, the old grease is removed or squeezed out through the drain plug. The nozzle should be wiped clean before adding new oil. If the bearing box does not have equipment for the nozzle, the bearing box cover or end cover should be opened to remove the old grease, and then the same fresh grease should be added.

Second, oil lubrication

When inspecting the oil level of the bearing, we should ensure that the type of oil used is correct and the air vent of the oil level device is blocked.

Take a small amount of oil as a sample and compare it with fresh oil. If the sample looks cloudy, it may be the result of mixing with water and should be replaced. If the sample darkens or thickens, it may indicate that the oil has begun to carbonize. All old oil should be replaced, and if possible, fresh oil should be used to flush the bearings. When changing the oil, ensure that the oil type must be the same, and supplement to the required oil level.

A more reliable way to determine the condition of the oil is to analyze the sample and replace the oil seal or consider the filter if the oil is contaminated.

Use oil bath lubrication system, if the operating temperature does not exceed 50-60 degrees Celsius, and the oil is not contaminated, then change the oil once a year. Change the oil four times a year if the operating temperature is 100 ° C, once a month if the operating temperature is 120 ° C, and once a week if the operating temperature is 130 ° C.

Correct installation and maintenance is an important factor in the maximum service life of bearings. At the same time, attention must be paid to the cleanliness of bearings, the correctness of bearing selection and the selection of appropriate installation and maintenance tools. Bearings must be protected from contaminants and moisture and must be properly installed and lubricated. Bearing configuration design, oil seal condition, lubricant type and lubrication cycle, as well as special maintenance all play the same important role.