新型 5 mm2/s 级季戊四醇酯航空发动机润滑油基础油性能研究

摘要/Abstract

摘要： MIL- PRF-23699G Enhanced Ester（EE）增强酯型润滑油标准是目前航空涡轮发动机润滑油极压承载能力和氧化安定性能的最高标准规范。针对双季戊四醇酯的高温氧化安定性弱于单季戊四醇酯，长链脂肪酸不能同时提高季戊四醇酯的氧化安定性与极压承载性的问题，采用季戊四醇、己二酸、C₅~C₉一元脂肪酸，通过直接酯化反应合成了一种新型 5 mm²/s 级季戊四醇酯基础油，相较于单、双季戊四醇酯混合型基础油，新型季戊四醇酯基础油具有更好的黏温性能与低温流动性，其氧化诱导期与Falex失效负荷提升幅度达到20%以上，解决了现有 5 mm²/s 级多元醇酯基础油合成技术路线中使用双季戊四醇酯、长链脂肪酸无法兼顾两种性能的问题，为下一代EE增强酯型航空发动机润滑油产品的研发提供一定参考。

关键词: 航空涡轮发动机, 润滑油, 增强酯, 季戊四醇酯, 氧化安定性, 极压抗磨性

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

王贻全赵梦亚贺景坚梁宇翔刘琼. 新型 5 mm²/s 级季戊四醇酯航空发动机润滑油基础油性能研究[J]. 石油炼制与化工, 2024, 55(8): 120-128.

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新型 5 mm²/s 级季戊四醇酯航空发动机润滑油基础油性能研究

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

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