As we all know, it is inevitable for any device or part to be damaged after long-term use, and the same is true for the use of bearings. What are the reasons for the damage of stud type track rollers? Particle abrasion, fatigue spalling, and melting are the common reasons, and there is a possibility of mutual influence. So how are they mainly composed?
Reasons for the damage of stud type track rollers
Particle abrasion
This is because small, solid particles mixed in the lubricating oil enter the gap between the bearing and the shaft with the circulation of the lubricating oil, adhere to the surface of the bearing, and form abrasive particles, resulting in scratches and indentations on the surface of the bearing.
Fatigue spalling
Under overload or wear, if the working temperature of bearing products is too high, the alloy layer is uneven or the fatigue strength of the alloy material is too low, the alloy layer will be fatigued and cracked under the impact of oil film pressure, and the fatigue crack will extend in the direction of the depth of the alloy layer, extending laterally to the adjacent joint surface alternately, resulting in such alloy material flaking off in a sheet-like pattern.
Melting
When the clearance between the roller, needle, and shaft bearings is too large or too small, there is no oil film formed between the bearing and the journal, and as a result, half-dry conflict or dry conflict occurs between the bearing and the journal, generating a lot of conflict heat, causing microscopic melting and adhesion. If this continues, the bearing will melt.
Judging the degree of damage of stud type track rollers and appropriate technical treatment
Observation
If the roller bearing track product is well lubricated and there is no foreign matter or moisture entering, it indicates that the oil seal of the bearing is not worn out. If the original bearing box is opened, the bearing should be visually inspected and the oil seal should be checked regularly. Check the condition of the oil seal near the bearing to ensure that they can prevent hot liquids, corrosive liquids, and gases from infiltrating the bearing along the axis. If the oil seal is damaged, it should be replaced as soon as possible. Check the automatic lubrication system to ensure that the oil or grease enters the bearing, and ensure the correct amount of addition. At the same time, check whether the lubricant has changed color or turned black. If so, usually indicates that the lubricant contains impurities, which is harmful to the use of bearings.
Listening
Using hearing to identify irregular operation is a very common method. Using a screwdriver or an electronic stethoscope to detect some abnormal noises is a method frequently used by experienced operators and maintenance personnel. stud type track rollers will emit a low, hum-like sound under good operating conditions. If the bearing emits sharp hissing, squeaking, and other irregular noises, it may indicate that the bearing is in a poor operating condition.
Touching
High temperature often indicates that the bearing is in an abnormal situation, and high temperature is also harmful to the lubricant inside the bearing. However, sometimes the high temperature of the bearing is caused by the lubricant inside the rolling bearing. If the bearing operates for a long time at a temperature above 120°C, it will reduce the service life of the bearing. The reasons for the high temperature of bearing products include insufficient or excessive lubrication, impurities in the lubricant, excessive load, bearing damage, insufficient clearance, and high friction caused by the oil seal. Under normal circumstances, the bearing will have a natural temperature rise immediately after lubrication or after lubrication, which can last for one or two days.
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