Maintenance Of ZZ Bearings

Time：2020.12.30  Source：Roller Bearings Suppliers

In order to maintain the original performance of the bearing in a good condition for as long as possible, maintenance, inspection and repair are necessary to prevent accidents before they occur, ensure the reliability of operation, and improve productivity and economy. Maintenance should be carried out regularly in accordance with the operating standards of the mechanical operating conditions. The contents include monitoring the operating status, replenishing or replacing lubricants, and regular disassembly inspections. As for maintenance items during operation, there are bearing rotation noise, vibration, temperature, lubricant state, etc. Therefore, the maintenance, overhaul, and abnormal handling of bearings are playing an important role in the life of ZZ bearings.

Damage and countermeasures of ZZ bearing

Generally, if the bearing is used correctly, it can be used until the fatigue life is reached. But there may be accidental premature damage and intolerance to use. This early damage, as opposed to fatigue life, limits the use of qualities called failures or accidents. It is mostly caused by careless installation, use, and lubrication, foreign matter invaded from the outside, and insufficient research on the thermal effect of the shaft and housing.

Regarding the damage state of the ZZ bearing, such as the jam of the ring rib of the roller bearing, the reasons can be considered, insufficient lubricant, unsuitability, defects in the oil supply and drainage structure, foreign matter intrusion, bearing installation errors, and shaft deflection. If the song is too big, these reasons will overlap.

Therefore, it is difficult to know the real cause of the damage only by investigating the damage of the ZZ bearing. However, if you know the machinery of the bearing, the operating conditions, the structure around the bearing, and the situation before and after the accident, combined with the damaged state of the bearing and several reasons, you can prevent similar accidents from happening again.

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The precautions for the use of ZZ bearings are as follows

Keep ZZ bearings and their turnover clean

Even small dust invisible to the eyes will have a bad effect on ZZ bearings. Therefore, keep the surroundings clean to prevent dust from entering the ZZ bearing.

Use with caution

A strong impact on the ZZ bearing during use will cause scars and indentations, which will cause accidents. In severe cases, it will crack or break, so be careful.

Use appropriate ZZ operating tools

Avoid replacing existing tools and tools, and must use appropriate tools. We often emphasize the importance of tools because too many customers have used the wrong tools in the installation and caused damage to ZZ bearings.

Pay attention to the corrosion of ZZ bearings

When handling ZZ bearings, sweat on your hands can cause rust. Pay attention to the operation with clean hands, it is best to wear gloves.

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Vibration can be said to be quite sensitive to the damage of ZZ bearings, peeling, indentation, corrosion, cracks, wear, etc. will be reflected in the vibration measurement of ZZ bearings. Therefore, by using a special ZZ bearing vibration measuring device (frequency analyzer, etc.), the magnitude of the vibration can be measured, and the specific abnormal situation cannot be inferred through the frequency division. The measured value varies with the use conditions of the ZZ bearing or the installation position of the sensor, so it is necessary to analyze and compare the measured value of each machine in advance to determine the judgment standard.

The effect of temperature on ZZ bearings

Let's take a look at the effect of temperature on the bearing. The high temperature often indicates that the ZZ bearing is in an abnormal condition. High temperature is also harmful to the lubricant of ZZ bearings. Sometimes bearing overheating can be attributed to the lubricant of ZZ bearings. Long-term continuous rotation of bearings at temperatures exceeding 125°C will reduce the life of ZZ bearings. Causes of high-temperature bearings include insufficient or excessive lubrication, lubricants. Containing impurities, excessive load, ZZ bearing ring damage, insufficient clearance, and high friction caused by oil seals, etc.

Therefore, it is necessary to continuously monitor the temperature of ZZ bearings, whether it is to measure the bearing itself or other important parts. If the operating conditions remain unchanged, any temperature change can indicate that a malfunction has occurred. ZZ bearing temperature can be measured regularly with the help of a thermometer, such as ZZ digital thermometer, which can accurately measure the ZZ bearing temperature and display it in ℃ or Fahrenheit. The important bearing means that when it is damaged, it will cause the shutdown of the equipment, so it is better to install a temperature detector for this type of ZZ bearing.

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