Rolling bearings are widely used in enterprise equipment, and their lubrication status has a direct impact on the stable and safe operation of the equipment. According to statistics, bearing faults due to poor lubrication account for 43%. Therefore, bearing lubrication should not only choose the appropriate grease, but also the determination of the amount of grease and the selection of grease interval are also very important for the stable and normal operation of bearings. Too much grease is added to the bearing, and the grease will deteriorate due to agitation and heating. Insufficient fat supplement, easy to cause insufficient lubrication, and then the formation of dry friction, wear, and even failure.
The lubrication of rolling bearings is to reduce internal friction and wear of bearings and prevent burning and sticking. The lubrication effect is as follows:
1. Reduce friction and wear
In the bearing ring, rolling body and cage mutual contact part, prevent metal contact, reduce friction, wear.
2. Prolong fatigue life
The fatigue life of the rolling body of the bearing is prolonged when the rolling contact surface is well lubricated in rotation. On the contrary, if the oil viscosity is low and the lubricating oil film thickness is bad, it will be shortened.
3. Eliminate friction heat and cooling
Circulating oil method can be used to discharge the heat generated by friction, or heat transmitted from the outside, play a role in cooling. Prevent bearing overheating and lubricating oil from aging.
4. Other
It also has the effect of preventing foreign matter from invading into the bearing interior, or preventing rust and corrosion.
Rolling bearings are generally composed of inner ring, outer ring, rolling body and cage.
The role of the inner ring is to match and merge with the shaft rotation;
The outer ring is matched with the bearing seat and plays a supporting role;
The rolling body distributes the rolling body evenly between the inner ring and the outer ring by means of the cage, and its shape, size and quantity directly affect the service performance and life of the rolling bearing.
The cage can make the rolling body evenly distributed, prevent the rolling body from falling off, guide the rolling body to rotate and play a lubrication role.
In order to ensure the long-term stable and safe operation of equipment, it is necessary for enterprises to strengthen the precision of lubrication. However, it can not only be calculated by theoretical experience, but also by on-site experience, such as temperature and vibration. Therefore, the following suggestions are put forward:
Keep adding fat at a constant speed in the process;
In the process of regular fat supplementing, the amount of fat produced at a single time should be determined.
Temperature change and sound were detected to adjust the amount of lipid-supplementing;
If conditions are available, the cycle can be shortened appropriately, the amount of supplementing fat can be adjusted to discharge old fat and inject new fat in time.
Post time: Mar-29-2022