航天器用氟醚类润滑脂老化与寿命预测研究

郭立; 李秀杰; 孙书; 张友义; 肖晓明; 李旭; 杨耀东

doi:10.21656/1000-0887.460025

航天器用氟醚类润滑脂老化与寿命预测研究

doi: 10.21656/1000-0887.460025

郭立^1,,
李秀杰^2, ,,
孙书²,
张友义²,
肖晓明²,
李旭²,
杨耀东²

1.
中国空间技术研究院，北京 100094
2.
北京卫星制造厂有限公司，北京 100094

(我刊青年编委田阔推荐)

详细信息

作者简介:
郭立(1975—)，男，高级工程师(E-mail: guoli20251@163.com)

通讯作者:
李秀杰(1982—)(通信作者. E-mail: lixiujie1219@126.com)

中图分类号: O39
计量
- 文章访问数: 82
- HTML全文浏览量: 23
- PDF下载量: 15
- 被引次数: 0
出版历程
- 收稿日期: 2025-02-17
- 修回日期: 2025-03-23
- 刊出日期: 2026-03-01

Study on Aging and Life Prediction of Fluoroether Lubricating Grease for Spacecraft

1.
China Academy of Space Technology, Beijing 100094, P. R. China
2.
Beijing Satellite Manufacturing Factory Co., Ltd., Beijing 100094, P. R. China

(Recommended by TIAN Kuo, M.AMM Youth Editorial Board)

摘要

摘要: 润滑脂老化性能退化对航天器展开机构、运动部件等运行的可靠性至关重要，但目前针对润滑脂的老化对性能影响及寿命预测的研究相对较少，缺少系统的理论指导航天器长寿命润滑脂的应用.选取质量变化率作为老化失效关键指标，通过应用阿伦尼乌斯方程(Arrhenius equation)和时间-温度关系，得到一个基于润滑脂质量保留率的时间-温度等效模型，可预测润滑脂在各种贮存条件下的质量变化.通过监测滴点、锥入度等关键性能指标的变化来评估其老化性能.研究表明，老化对滴点、锥入度性能影响较大，当润滑脂质量损失率达到1%时，预测失效寿命为5.4 a.同时，利用四球摩擦试验研究了润滑脂在不同载荷下对轴承钢GCr15的摩擦性能.结果表明，在较大载荷条件下，老化对润滑脂摩擦因数与磨斑直径的影响更加显著.研究结果及方法为了解润滑脂老化性能退化及寿命预测研究提供了依据，能够为航天器长寿命润滑脂的选择和优化设计提供理论支撑.
- 氟醚润滑脂 /
- 加速老化测试 /
- 寿命 /
- 四球摩擦试验
Abstract: The lubricating grease degradation and aging performance is critical to the reliability of spacecraft deployment mechanisms, moving components, and other related products. Limited research has been conducted on the effects of grease aging on performance and lifespan prediction, with insufficient theoretical support for the application of long-life lubricating grease in spacecraft. The quality change rate was selected as the key performance for aging failure, a time temperature equivalent model based on the quality retention rate of lubricating grease was obtained by means of the Arrhenius equation and the time temperature relationship, which can predict the quality change of lubricating grease under various storage conditions. Key parameters such as the droplet point and the cone penetration were monitored to evaluate the lubricating grease aging performance. The results show that, aging has a significant impact on the droplet point and the cone penetration performance, with a 1% loss rate of the lubricating grease mass indicating a predicted lifespan of 5.4 a at the failure point. In addition, a 4-ball friction test was used to study the lubricating grease friction performance on bearing steel GCr15 under different loads. The test indicate that aging significantly influences the lubricating grease friction coefficient and the wear zone diameter under high loads. The research results and methods provide a basis for understanding the lubricating grease degradation and aging performance, and predicting its lifespan.
- fluroether lubricating grease /
- accelerated ageing test /
- shelf-life /
- 4-ball tribometer
edited-by

edited-by
注释:

1) (我刊青年编委田阔推荐)

HTML全文

图 1 老化温度下润滑脂的质量保留率与时间曲线

注为了解释图中的颜色，读者可以参考本文的电子网页版本，后同.

Figure 1. Relations between the mass retention rate of grease and the aged time at different aging temperatures

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图 2 老化温度下润滑脂的滴点与时间曲线

Figure 2. Dropping points and time curves of lubricating grease at different aging temperatures

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图 3 不同老化温度下锥入度与时间曲线

Figure 3. Cone penetration-time curves at different aging temperatures

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图 4 润滑脂T2铜腐蚀情况

Figure 4. The copper corrosion of lubricating grease T2

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图 5 基础油红外光谱图

Figure 5. The infrared spectrum of base oil

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图 6 140 ℃时的红外光谱图

Figure 6. The infrared spectra at 140 ℃

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图 7 140 ℃失重曲线

Figure 7. The weight loss curves at 140 ℃

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图 8 同一老化时间(90 d)不同老化温度失重曲线

Figure 8. The weight loss curves at different aging temperatures for the same aging time (90 d)

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图 9 不同载荷下GCr15钢主球的磨损表面宏观形貌

Figure 9. Macroscopic morphologies of wear surfaces of GCr15 steel main balls under different loads

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图 10 质量保留率对数与老化时间的线性关系

Figure 10. Linear extraction curves of the quality retention rate logarithm and the aging time

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图 11 ln K与1 000/T的关系曲线

Figure 11. Relation curves of ln K and 1 000/T

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表 1 试验材料参数

Table 1. Experimental material parameters

dropping point /℃	cone penetration /(0.1 mm)	evaporation capacity(100 ℃)/%	oil separation(200 g±2 g)/(%·(m/m))
≥120	50~70	≤1	≤7

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表 2 润滑脂滴点实测值

Table 2. Measured values of lubricant drip points

sample description	dropping point/℃
1^#	156
2^#	157
3^#	156
4^#	156
5^#	157
average value	156

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表 3 载荷与摩擦因数、直径关系

Table 3. Relationships between the load, the friction coefficient and the spot diameter

sample	friction factor			wear-scar /mm
sample	100 N	200 N	300 N	100 N	200 N	300 N
non-aged lubricating grease	0.184	0.152	0.123	0.53	0.65	0.57
accelerated aging lubricating grease(140 ℃，90 d)	0.176	0.173	0.153	0.53	0.68	0.77

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表 4 润滑脂主要理化参数

Table 4. Main physico-chemical parameters of lubricating greases

parameter	grease not aged (storage for 5 a)	grease (storage for 5 a)	grease not aged (life expectancy prediction of 5.4 a)	grease (life expectancy prediction of 5.4 a)
dropping point/℃	157	145	156	143
1/4 cone penetration/(0.1 mm)	60	53	59	52

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