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Application Mechanism and Status Quo of Open Gear Lubricating Oil
2014/7/15
Open gear lubricants are mostly in a mixed lubrication state and are mainly in the boundary lubrication state. Under boundary lubrication conditions, various active substances in the lubricating oil form an oil film on the tooth surface through physical adsorption and chemical reaction, and the extreme pressure resistance and firmness of the chemical film are much higher than that of the physical film. The formation of the tooth surface protective film is related to various industrial and mining conditions. Generally, the tooth surface is mainly lubricated by the adsorption film under low load, and the mixed film coexists under medium load, and the chemical film is mainly under heavy load. The formation of the oil film is a complicated process. If a solid lubricating material is added to the lubricating oil, the solid lubricating material plays a vital role in the case of high temperature and high pressure.
The failure of open gear lubricants depends mainly on the manufacturing process, installation accuracy, operating conditions, lubrication conditions, and so on. Mainly manifested as tooth surface burns, abrasions, tooth surface pitting, gluing and so on. Tooth surface burn is mainly caused by excessive tooth surface load and lack of oil, which causes the tooth surface temperature to rise seriously. The original material changes due to high temperature; the scratch is caused by factors such as the abrasive grain temperature of various impurities during the movement of the gear. The tooth surface oil film is destroyed by dry friction, causing the tooth surface to be scratched in the sliding direction; pitting is the tooth surface being subjected to multiple cycles of high contact stress, and small pieces or small pieces of material are peeled off in a local area of the tooth surface to form a pitting or The pits; the gluing is the intermeshing tooth surface. Under the heavy load, the boundary lubrication film is broken, and the tooth surface metal is welded and damaged and glued.
The failure of open gear lubricants is related to many factors, but the improvement of lubrication conditions is very beneficial to reduce or eliminate wear, abrasion, pitting, gluing and other wear.
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