2013年8月23日星期五

Oil-bearing support bearing assembly rotating

Oil-bearing assembly of the supporting shaft. Its rings and rolling elements are precision machined. Bearing in the factory, in order to protect the surface of the raceways and rolling elements are not corroded, in between the raceways and rolling elements into a rust grease oil or rust.

Bearings should be cleaned before installation. With anti-rust oil sealed bearing directly available gasoline or kerosene cleaning; thick oil or grease rust rust charged shall, light mineral oil, such as 10 # transformer oil heating oil or fat will melt cooled, then gasoline or kerosene to clean. Sides with shields or seals bearing grease at the factory joined, so when you do not have to clean install. Coated with anti-rust lubricant oil dual IKO cross roller bearings, the installation also without cleaning. In cleaning the installation process, should prevent foreign matter falling into the bearings, the result of slight abrasive will cause between the rolling element and raceway wear, increased noise and vibration.

Oil-bearing assembly and disassembly, mainly through two ways. First, the interference rings onto the shaft or pressed into the bearing hole; First, by heating up a large diameter bearing it, or cooling the bearing outer diameter narrowing it will be easily mounted on the shaft bearing seat or push hole. When pressurized mode, mechanical force or fluid pressure through a dedicated device will force acts directly on the assembly and disassembly of the seat ring, and never allow loading and unloading of force pass through the rolling. Otherwise it will cause the surface of the raceway and rolling elements indentation, resulting in increased noise and vibration damage. If a heating or cooling means for detachably, the heating temperature should be strictly controlled or cooling temperatures. Because the strength of the bearing surface microstructure by the structure of the metal surface, the temperature is too high will cause the tempering effect; temperature was too low will cause embrittlement of the metal surface. Typically the heating temperature does not exceed 100 ℃, the cooling must not end at the lowest temperature of minus 50 ℃. Also to be considered to be uniform heating.

Practice has proved that non-oil bearing improper installation causes premature bearing damage is one of the reasons. The ferrule assembly and disassembly with the interference is a very difficult thing, so the design of supports, we must consider how IKO cross roller bearing assembly and disassembly and easy assembly and disassembly of the problem. For heavy machinery assembly and disassembly of large bearings often need to design special equipment. If the high-pressure oil removal would need to be designed accordingly oil, pipes and pumps.

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