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What are the common faults of rolling bearings? How to fix it?

wallpapers Tech 2020-05-27
Most lawn machinery uses rolling bearings. Rolling bearings have a high cost, but in terms of benefits in use and maintenance costs, they generally save more than 30% compared to the use of sliding bearings.
(1) Common faults of rolling bearings
Due to its own quality and external conditions, the bearing capacity, rotation accuracy and wear resistance of rolling bearings will change during use. When the performance index of the bearing is lower than the use requirements and cannot work typically, the bearing will malfunction or even fail, and the machine and equipment will stop. Therefore, it is necessary to find out the cause of the occurrence in a short time and take corresponding measures.
After running for a long time, rolling bearings will produce the following faults:
① The clearance of the rolling bearing is too large, and the wear is serious.
② The cage is deformed or cracked.
③The rolling elements are worn out and deformed, and broken when severe.
④The rolling bearing is overheated, and the color turns blue. Most of them are caused by the overheating of the rolling bearing for a long time e68a843231313335323631343130323136353331333431343564.
⑤ The inner ring, outer ring, and rolling elements of the rolling bearing are worn, and there are pits or rust marks.
(2) Failure causes of rolling bearings
Generally speaking, 1/3 is because the bearing has reached the fatigue exfoliation period, which is a typical failure; 1/3 is due to inadequate lubrication leading to early failure, 1/3 is due to dirt entering the bearing or incorrect installation, resulting in premature failure.
① The grease and lubricating oil have expired or are wrongly selected.
②The fat in the bearing box is too full, or the oil level is too high; the grease is not enough, or the oil level is too low.
③The interference of the contact oil seal is too large, or the spring is too tight; the contact oil seal wears seriously, causing the lubricant to leak.
④The diameter of the shaft is too large or too small.
⑤ The coaxial of two or more bearings is not good.
⑥The inner sleeve or outer sleeve of the shaft and bearing is twisted.
⑦The rod is bent due to unreasonable shoulder size.
⑧The area of ​​the shaft shoulder in the bearing box is too small, which causes the outer ring of the bearing to twist.
⑨The shaft shoulder rubs against the bearing seal cover, and the bearing seal cover is twisted.
⑩Insufficient or excessive locking of the tightening sleeve.

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Tag: rolling bear