How to prevent FAG bearing corrosion

  FAG bearing corrosion is mainly divided into metal corrosion and human hand sweat, metal corrosion accounts for the majority, and in many cases can not be avoided. Hand sweat can also cause FAG bearing corrosion, mainly because sweat film will produce a sweat film on the surface, and the interaction will cause electrochemical reaction and lead to corrosion, but it can be avoided, such as tools with gloves for taking parts.

Metal corrosion mainly includes:

1 surface finish; 2 chemical structure and composition of metal materials; 3 solution composition and pH value of metal surface; 4 environmental medium; 5 ambient humidity and temperature.

Anti-rust pretreatment method:

Keep the surface clean and clean the appropriate method. General chemical treatment cleaning, mechanical cleaning and solvent cleaning methods. After the surface is cleaned, it can be dried by dry compressed air. It can also be dried with a dryer at 120~170 °C, and then dried with a clean gauze.

(1) Spray method

For example, some large-scale anti-rust materials can not be immersed in oil, mainly suitable for thin-layer anti-rust oil or solvent-diluted anti-rust oil, but pay attention to labor and fire protection measures.

(2) Brushing method

When brushing, it is not only necessary to avoid accumulation, but also to prevent leakage. It is generally suitable for some special-shaped products or outdoor construction equipment that do not use soaking or spraying.

(3) immersion method

The oil film thickness can be achieved by controlling the temperature or viscosity of the rust preventive grease. Some small items are immersed in anti-rust grease to adhere a layer of anti-rust grease to the surface.

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Fault detection caused by KOYO bearing assembly and improper clearance

KOYO bearings are the main components of locomotives, especially traction motors and axlebox KOYO bearings. Their functions play a decisive role in safe transportation. When the locomotive is running online, once the KOYO bearing fails, the whole train will not run, and the transportation will be blocked. On the positive line, especially the failure of passenger trains, the negative impact is even greater. At the same time, once the locomotive KOYO bearing fails, it is very difficult to repair the locomotive. Therefore, it prevents and reduces the occurrence of locomotive KOYO bearing failure, and the safety of the locomotive. Transportation is very important. Can you detect KOYO bearings with hidden troubles before KOYO bearings are loaded?

The serious damage of KOYO bearings is often not caused by a single cause, but in a combination of several aspects, a vicious cycle occurs under severe operating conditions, resulting in serious burning of KOYO bearings, so it is often difficult to judge after an accident It is caused by some reasons, and it also brings certain difficulties to our related measures. For the convenience of discussion, we first analyze the reasons for the failure of KOYO bearings from several aspects.

When KOYO bearings are used for a period of time, KOYO bearing inner rings, rolling elements, cages, outer rings, raceways, etc. produce certain defects and scars, resulting in poor lubrication of KOYO bearings, causing heat generation of KOYO bearings, long-term heating, Will lead to: (1) dilution of KOYO bearing lubricants. (2) Accelerate the fatigue of the material and reduce the hardness. Due to the above reasons, a vicious cycle is further formed, and the overheating is accelerated to burn the KOYO bearing. The serious KOYO bearing inner ring displacement, the rolling element is out of round, the collision heats up, and finally welded together. Therefore, when running online, if KOYO bearings are found to be severely hot and smoke, do not stop, but keep running to the front station, because the overheated KOYO bearings are in a molten state at this moment, once they stop cooling, they can no longer walk and block the positive line.

It is very important for the oil supply maintenance of the locomotive KOYO bearing, especially for the KOYO bearing. The KOYO bearing has a good lubrication effect. The lack of oil and too much oil can easily cause KOYO bearing failure. KOYO bearings are poorly lubricated and heated. If more is added, it is easy to cause agitation and overheating. Therefore, it is necessary to supply oil in maintenance. At the same time, the cleaning of KOYO bearing grease is also very important. Once other impurities and moisture are dropped into the grease, it will affect. Normal play and build the necessary oil film.

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