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NTN self-lubricating bearing has wide service temperature, sufficient solid lubricating material content and uniform release. It has good self-lubricating Application Area performance and bite, which can effectively protect the journal and achieve the purpose of lasting use.
It is suitable for operation in the environment of high temperature, low speed, heavy load, large dust, water flushing and impact Application Area vibration.
This kind of NTN bearing can be widely used in the rolling and sliding bearing parts of mining Application Area machinery, metallurgy, petroleum, chemical industry, food, textile, papermaking, printing and dyeing and other mechanical equipment.
The aluminum liquid produced by the aluminum reduction cell is Application Area sucked out by vacuum lifting and poured into the mixing furnace. After proportioning and slag removal, it flows into the aluminum ingot casting machine for casting and forming.
The formed solid is called aluminum ingot, and the produced aluminum ingots are stacked by the stacker. In order to improve production efficiency, aluminum Application Area ingots must be cooled with a large amount of cooling water before forming.
In the cooling process, the huge heat energy of aluminum liquid is released into the cooling water to produce hot water vapor.
Casting machine bearings are in high temperature and steam environment. Many bearings are lubricated with grease. The added grease will melt and overflow due to high temperature in a short time.
It is difficult to maintain and wipe the surface of the equipment. In addition, steel structure bearings are easy to corrode and rust in hot and humid environment, with very high failure rate and high Application Area equipment maintenance cost. The following two problems are often encountered in equipment operation.
The ingot pulling, ingot moving, Application Area ingot connecting, ingot turning and other devices of the casting machine are installed in the unit shell. Each rotating bearing is designed with a nozzle facility for regularly injecting lubricating grease.
When injecting oil, stop and remove the shell, and press the lubricating grease with an oil gun. Moreover, there are more than 30 oil filling points of the whole machine. This cumbersome oil filling operation cannot be realized for long-term operation and maintenance.
Therefore, we have to pour the thin oil pot on the outside of the Application Area running bearing sleeve. It is difficult for the lubricating oil to enter the friction pair of the bearing, and most of the bearings are in the friction state.
The ambient temperature is high and the grease lubrication is not suitable. At present, the molybdenum disulfide grease used in the rolling bearing of the casting machine is considered to be high-temperature resistant grease.
We know that its base oil is petroleum products. Add a small amount of high-temperature resistant molybdenum disulfide additive, and its temperature resistance limit is 120 ℃. According to the measurement, the working temperature of the casting machine bearing can reach 200 ℃,
which has far exceeded the temperature resistance limit of the lubricating grease. Under such high temperature conditions, the base oil in the lubricating grease will become thin and evaporate gradually, and the remaining carbon slag, molybdenum disulfide and dust will be mixed into solid blocks and solidified on the cage of the rolling bearing.
It will not only lose its lubricating effect, but also hinder the normal operation of the rolling bearing and wear quickly. It will have to shut down for more than 2 weeks, remove the NTN bearing, clean and replace the grease.