How to maintain and maintain SKF bearings

The purpose of lubrication of SKF bearings is to reduce internal friction and wear of the bearings and prevent burn-in. The lubrication effect is as follows:

1, reduce friction and wear

In the mutual contact portion of the ferrule, the rolling element and the retainer constituting the SKF bearing, metal contact is prevented, and friction and wear are reduced.

2, prolong fatigue life

The rolling fatigue life of SKF bearings is prolonged when the rolling contact surface is well lubricated during rotation. Conversely, if the oil viscosity is low and the thickness of the lubricating oil film is not good, it is shortened.

3, discharge friction heat, cooling

The circulation oil supply method or the like can be used to discharge heat generated by friction or heat from the outside to cool. Prevent the SKF bearing from overheating and prevent the lubricant from aging itself.

4, other

There is also the effect of preventing foreign matter from entering the inside of the bearing or preventing rust and corrosion.

Lubrication method: The lubrication method of SKF bearing is divided into grease lubrication and oil lubrication. In order to make the bearing function well, first, choose a lubrication method that suits the conditions of use and the purpose of use. Lubricity of oil lubrication predominates if only lubrication is considered. However, grease lubrication has the advantage of simplifying the structure around the SKF bearing, comparing the advantages and disadvantages of grease lubrication and oil lubrication.

In order for SKF bearings to be fully utilized and to maintain their proper performance for a long time, regular maintenance (regular inspection) must be performed. Through proper periodic inspections, early detection of failures and prevention of accidents are important to improve productivity and economy.

1, cleaning

When the SKF bearing is removed and inspected, the appearance record is first recorded by photography. In addition, confirm the amount of lubricant remaining and sample the lubricant before cleaning the SKF bearing.

a. The cleaning of the bearing is carried out by rough washing and fine washing, and a metal mesh frame can be placed on the bottom of the used container.

b. When rough washing, remove the grease or adhesive with a brush or the like in the oil. At this time, if the SKF bearing is rotated in the oil, be careful that the rolling surface will be damaged by foreign matter or the like.

c. When fine washing, slowly rotate the SKF bearing in the oil, and it must be carried out carefully.

The cleaning agent generally used is a neutral non-aqueous diesel oil or kerosene, and a warm alkali liquid or the like is sometimes used as needed. Regardless of which cleaning agent is used, it is often filtered and kept clean. Immediately after cleaning, apply anti-rust oil or anti-rust grease to SKF bearings.

2, inspection and judgment

In order to judge whether the removed SKF bearing can be reused, it is important to check its dimensional accuracy, rotation accuracy, internal clearance, mating surface, raceway surface, cage and seal. Regarding the inspection results, it can be judged by the SKF bearing or the SKF bearing. The criteria for judgment vary depending on mechanical properties and importance, inspection period, and the like. SKF bearings must not be reused if they are damaged and must be replaced.

a, the fracture and defects of the bearing components.

b. Peeling of the rolling surface of the raceway surface.

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The latest method of routine maintenance and maintenance of FAG sliding bearings

First, the bearing maintenance technology problems:

Two major complications related to FAG bearing maintenance technology are: 1. When to change oil. 2. How much oil should be changed? If the oil change is too small, the sliding bearing will be scrapped in advance; if the oil is changed too much, the bearing will be in trouble or the power coil and the coil will be damaged for a long time.

Second, the maintenance technology of the bearing:

The way to determine when to lubricate and when to stop oiling is simple: monitor when developing a baseline, setting up an observation schedule, and filling the oil.

1. Develop a basic line

The bearing base line reflects the decibel strength under normal operating conditions, no visible errors, and sufficient lubrication.

Three ways to develop a baseline:

1), comparison method: If there are multiple bearings of the same type, these sliding bearings can be put together for comparison. Use the same test method or observe each bearing from the same angle. Analyze the decibel intensity and sound quality. If there is no essential difference (less than 8 decibels), we can set it to the base decibel strength of each bearing.

2) Set the basic line when adding lubricating oil: When adding lubricating oil, listen to the intensity of the sound, when the sound intensity drops and then rises. At this time, do not add too much oil, and set it as the basic line.

3) History: Observe the decibel strength of the FAG bearing, record it every day, and then compare the recorded results for 30 days. If the decibel intensity changes little or no (less than 8 decibels), we can set this as the baseline and use it for later comparisons.

2, set the observation timetable

Equipment criticality associated with total production, environmental results, and operational results is a major factor in selecting and setting up an evaluation mechanical system. It is very necessary to test once a month after the basic observation line is established. For high-decibel bearings that are to be lubricated, the frequency should be detected more frequently so that changes that may occur are observed. If a bearing is in a state of destruction, the lubricant can only temporarily cover up the error. However, the decibel intensity will rise quickly to show the existence of the error. In some cases, this phenomenon will appear in a few minutes, while others will take several days.

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