The latest method of daily maintenance and maintenance of KOYO bearings

First, the problems of the maintenance technology of KOYO imported bearings:

The two major problems related to KOYO's imported bearing maintenance technology are: 1. When to change the oil. 2. How much oil should be changed? If the oil change is too small, the bearing will be scrapped in advance; if the oil change is too much, KOYO bearings will be in trouble or long-term damage to the power coil and coil.

Second, KOYO imported bearing maintenance technology:

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 KOYO imported 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 KOYO bearings of the same type, these 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 dB), we can set it as the base decibel strength of each KOYO 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 KOYO bearings, record them daily, and then compare the results of 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 KOYO bearings that are to be lubricated, the frequency should be detected more frequently so that changes that may occur are observed. If a KOYO 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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Imported bearing grease injection and grease loss

For sealed imported bearings, the production has been filled in the appropriate grease, open the bearing to set the seal on the main machine to prevent grease leakage. This has become a problem with the grease of the bearing. Note that too little fat is likely to cause a lack of fat or dry friction, affecting life. Grease can cause excessive bearing temperature rise. A large amount of grease leaks, not only pollutes the environment, but also wastes. Therefore, better bearings are placed on the premise of the amount of grease in the imported bearings to ensure adequate lubrication.

Lubrication friction: A resistance to mechanical friction that forms part of the surface of the film. Cooling temperature: Take away heat through oil circulation to prevent sintering. Clean: Clean the friction surfaces of the work surface and other materials produced by the metal by flowing oil. Sealed against leaks: reduces gas leakage and external contaminants. Corrosion: Adsorbs on the surface to prevent water, air, acids, harmful gases and contact areas. Buffer: A sharp rise in engine cylinder pressure, a sudden increase in the piston, piston pin, connecting rod and crankshaft bearing oil bearing load can withstand the impact load buffer.

There are three main reasons for the loss of grease: chemical reasons: the lubrication effect of partial heating and air friction, the base oil and thickener are oxidized, resulting in the destruction of the grease structure and the loss of softening. Physical reasons: due to friction during partial operation, grease under constant shear stress, soap structure damage, softening loss. Causes of impurities: Sports clothing produced in the body, metal powder can accelerate the oxidation of organic acids, oils, fats, thereby destroying the structure and causing oil failure. According to the operating conditions of the equipment (including load, temperature, speed, etc.), the correct choice of grease is used to extend the life of the grease.

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Reasons for corrosion of SKF bearing products

The main causes of corrosion are as follows:

1. In the process of producing SKF bearings, some enterprises did not strictly follow the requirements of cleaning anti-rust regulations and oil seal anti-rust packaging for anti-rust treatment of SKF bearing parts and SKF bearing products after processing. If the ferrule has a long turnaround time during the turnaround, the outer ring of the outer ring is exposed to corrosive liquid or gas.

2. The quality of anti-rust lubricating oil and cleaning kerosene used by some enterprises in production cannot meet the requirements of process technology.

3. As the price of SKF bearing steel drops and then falls, the material of SKF bearing steel gradually declines. For example, the content of non-metallic impurities in the steel is too high (the increase in sulfur content in the steel causes the corrosion resistance of the material itself to decrease), the metallographic structure deviation, and the like. The source of SKF bearing steel used by the production enterprises is more complicated, and the quality of the steel is even more.

4. Some enterprises have poor environmental conditions, high levels of harmful substances in the air, and too little turnover space, making it difficult to carry out effective anti-rust treatment. Coupled with the hot weather, production workers violated anti-rust procedures and other phenomena.

5, some enterprises' anti-rust paper, nylon paper (bag) and plastic cylinders and other SKF bearing packaging materials do not meet the requirements of rolling SKF bearing oil seal anti-rust packaging is also one of the factors causing corrosion.

6. The turning allowance and grinding allowance of some SKF bearing rings are small, and the oxide scale and decarburization layer on the outer circle are not completely removed.

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How to lubricate and maintain FAG bearings

Lubrication has an important effect on the life of FAG bearings, so we need to apply the correct lubrication and maintenance methods.

1, oil bath lubrication

Oil bath lubrication The common lubrication method in FAG bearings is suitable for lubrication of low and medium speed FAG bearings. Part of the FAG bearing is immersed in the groove, the lubricating oil is brought up by the rotating FAG bearing part, and then flows back to the oil groove. The oil level should be slightly lower than the center of the lowest rolling element.

2, drip lubrication

Drip oil lubrication is suitable for FAG bearing parts that need to supply lubricating oil quantitatively. The amount of dripping oil is generally one drop every 3-8 seconds. Excessive oil quantity will cause the temperature of FAG bearing to increase.

3, circulating oil lubrication

The filtered oil is sent to the FAG bearing component by an oil pump, and the lubricating oil after passing through the FAG bearing is filtered and cooled for use. Since the circulating oil can take away a certain amount of heat and cool the FAG bearing, this method is suitable for FAG bearing parts with higher speed.

4, spray lubrication

The dry compressed air is mixed with the lubricating oil through a sprayer to form an oil mist. In the FAG bearing, the airflow can effectively cool the FAG bearing and prevent the intrusion of impurities. This method is suitable for the lubrication of high speed, high temperature FAG bearing components.

5, injection lubrication

The high-pressure oil is injected into the FAG bearing through the nozzle by the oil pump, and the oil injected into the bearing flows into the oil groove through the other end of the FAG bearing. When the FAG bearing rotates at a high speed, the rolling elements and the cage also form a gas flow at the relatively high rotation speed of the surrounding air. It is difficult to send the lubricating oil to the FAG bearing by the general lubrication method, and the lubrication must be performed by the high-pressure injection method. The oil is sprayed into the FAG bearing and the position of the nozzle should be placed between the inner ring and the center of the cage.

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