STUDY ON PERFORMANCE OF A NOVEL 5 mm2/s GRADE PENTAERYTHRITOL ESTER LUBRICANT BASE OIL FOR AERO-ENGINE

Abstract

Abstract: MIL-PRF-23699G Enhanced Ester (EE) lubricating oil has become the highest standard to measure the extreme load-carrying properties, and high-temperature oxidation stability. The oxidation stability of dipentaerythritol ester was weaker than that of pentaerythritol ester at high temperature, and long-chain fatty acid could not simultaneously improve the oxidation stability and the extreme load-carrying properties of pentaerythritol ester. A novel structure of 5 mm²/s grade pentaerythritol ester base oil was synthesized by direct esterification of pentaerythritol, adipic acid and C₅-C₉ monounsaturated fatty acids. Compared with current mixed esters of pentaerythritol esters and dipentaerythritol esters, the new pentaerythritol ester base oil had better viscosity-temperature performance, low temperature fluidity and rubber compatibility, and its oxidation induction period and Falex failure load were improved by more than 20%. The existing problems of using dipentaerythritol ester and long chain fatty acid in the existing synthesis technology of 5 mm²/s grade polyol ester base oil were solved. It is expected to provide a reference for the research and development of the next generation of EE-enhanced ester-based aero-engine lubricant oil products.

Key words: aviation turbine engine, lubricating oil, enhanced ester, pentaerythritol ester, oxidation stability, extreme pressure and anti-wear performance

References

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STUDY ON PERFORMANCE OF A NOVEL 5 mm²/s GRADE PENTAERYTHRITOL ESTER LUBRICANT BASE OIL FOR AERO-ENGINE

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