Thermo-Elastohydrodynamics of Coated Polymer Gears

涂层聚合物齿轮的热弹流体动力学

基本信息

批准号：
391059617
负责人：
Professorin Dr.-Ing. Kirsten Bobzin
金额：
--
依托单位：
Institut für Oberflächentechnik (IOT)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2018
资助国家：
德国
起止时间：
2017-12-31 至 2019-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/391059617?language=en
关键词：
Thermo Elastohydrodynamics Coated Polymer Gears

项目摘要

Climate change, the depletion of scarce resources, strict carbon emission allowances and e mobility are challenges that result in a constantly increasing demand for efficient machines and systems. Lightweight designs made from engineering polymers are one very promising approach to tackle these challenges at a minimum of costs through large-scale production possibilities. However, their capabilities in high-performance power-transmitting machine elements such as gears are mainly limited by lower material strength and thermal stability compared to common metal designs of tribological systems. The comprehension of polymer tribosystems and its mechanisms, especially related to heat management, offers great potential to extend the application limits of engineering polymers. Moreover, recent developments in surface coating technology show ways for expanding capabilities of engineering polymers that increase functional density of such machine elements tremendously. Hence, the goal of this confraternal research proposal is to explore the thermo-elastohydrodynamic lubrication (TEHL) of thermoplastics and the potentials of surface coatings in these TEHL contacts in order to improve its tribological performance. Thereby, polyamide (PA6.6) and Polyetheretherketone (PEEK), both pure and reinforced, are used in steel-thermoplastic pairings (main contact setup) and plain thermoplastic pairings (complementary contact setup). Three stages are defined that lead through the project. At first, the tribological performance and load limits of uncoated thermoplastic TEHL contacts are determined. Concurrently, innovative coating systems are designed for the needs - inter alia based on graded zirconium carbide (ZrCg) and chromium-aluminum-nitride ((Cr,Al)N). Second, the previous investigations are conducted in a similar fashion on coated setups to reveal its benefits. Comprehension of the mechanical and thermal mechanisms involved in coated and uncoated thermoplastic TEHL contacts is ensured by comprehensive tribosimulations. Finally, the gained knowledge is transferred from model contacts to gear contacts and assessed for industrial applications.The systematic approach of this project allows determination of the performance and limiting factors in uncoated thermoplastic TEHL contacts as well as the benefits of coating technology in such contacts, which is essential for improving the capability of engineering polymers for power transmitting machine elements.

气候变化，稀缺资源的消耗，严格的碳排放津贴和E流动性是导致对高效机器和系统需求不断增加的挑战。由工程聚合物制成的轻量级设计是一种非常有前途的方法，可以通过大规模生产的可能性以最低成本来应对这些挑战。但是，与摩擦学系统的常见金属设计相比，它们在高性能电力传输机中的能力主要受到较低的材料强度和热稳定性的限制。对聚合物Tribosystems及其机制的理解，尤其是与热量管理有关的机制，为扩展工程聚合物的应用范围提供了巨大的潜力。此外，表面涂料技术的最新发展展示了扩大工程聚合物能力的方式，这些功能会大大提高此类机器元件的功能密度。因此，这项共和力研究建议的目的是探索热塑性塑料的热层流动力润滑（TEHL）以及这些TEHL接触中表面涂层的潜力，以改善其摩擦学性能。因此，用于纯和增强的聚酰胺（PA6.6）和聚醚酮（PEEK）用于钢层塑性配对（主触点设置）和普通的热塑性配对（互补的接触设置）。定义了通过项目进行的三个阶段。首先，确定未涂层热塑性TEHL接触的摩擦学性能和负载极限。同时，创新的涂料系统是为需求而设计的 - 除其他等级的含锌锆（ZRCG）和铬氧化铝（（CR，Al）N）。其次，先前的调查以类似的方式对涂层设置进行，以揭示其好处。通过全面的倒角模拟确保了对涂层和未涂层的热塑性TEHL接触涉及的机械和热机制的理解。最后，收获的知识从模型接触到齿轮接触并评估了工业应用。该项目的系统方法允许确定未涂层的热塑性TEHL接触中的性能和限制因素，以及此类接触中涂层技术的好处，这对于提高工程聚合物的能力来提高电动机传输机器元素的能力至关重要。