聚四氟乙烯润滑SUS440C/Si3N4在低温环境下的摩擦特性

IF 2.2 3区工程技术 Q2 ENGINEERING, MECHANICAL

Journal of Tribology-transactions of The Asme Pub Date : 2023-05-04 DOI:10.1115/1.4062486

Hiromitsu Kakudo, S. Takada, T. Hirayama

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引用次数: 0

摘要

低温环境下聚四氟乙烯润滑SUS440C-Si3N4的摩擦特性研究还不够深入。为了提高液体火箭发动机涡轮泵用球轴承性能建模的保真度，需要明确这种摩擦条件下的润滑机理。为明确低温涡轮泵球轴承的摩擦特性，对低温环境下PTFE润滑轴承材料的摩擦系数进行了实验研究。这些实验揭示了接触压力与摩擦系数的关系。通过多次分析发现，由于摩擦能适中，PTFE薄膜在SUS440C表面形成的金属氟化物表面具有较强的粘附性，从而使SUS440C具有较低的摩擦性能和较好的耐磨性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Friction Characteristics of SUS440C/Si3N4 Lubricated by Polytetrafluoroethylene under Cryogenic Environment

The friction characteristics of SUS440C-Si3N4 lubricated by PTFE under cryogenic environment have not been researched well. The lubrication mechanisms in such friction condition need to be clarified to improve the fidelity of performance modeling for ball bearings used in liquid rocket engine turbopumps. This research experimentally investigated the friction coefficient of bearing materials via PTFE lubrication under cryogenic environment to clarify the friction characteristics of cryogenic turbopump ball bearings. These experiments revealed the dependance of the contact pressure on the friction coefficient. By several analyses, it was found that lower friction and better wear-resistance characteristics were caused by PTFE film that strongly adhered on metal fluoride formed on the surface of SUS440C due to moderate friction energy.

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来源期刊

Journal of Tribology-transactions of The Asme 工程技术-工程：机械

CiteScore

4.20

自引率

12.00%

发文量

117

审稿时长

4.1 months

期刊介绍： The Journal of Tribology publishes over 100 outstanding technical articles of permanent interest to the tribology community annually and attracts articles by tribologists from around the world. The journal features a mix of experimental, numerical, and theoretical articles dealing with all aspects of the field. In addition to being of interest to engineers and other scientists doing research in the field, the Journal is also of great importance to engineers who design or use mechanical components such as bearings, gears, seals, magnetic recording heads and disks, or prosthetic joints, or who are involved with manufacturing processes. Scope: Friction and wear; Fluid film lubrication; Elastohydrodynamic lubrication; Surface properties and characterization; Contact mechanics; Magnetic recordings; Tribological systems; Seals; Bearing design and technology; Gears; Metalworking; Lubricants; Artificial joints