Effects of Optimal Tooth Microgeometry Modifications on Static and Dynamic Transmission Errors of Hybrid Spur Gear Drivetrains

IF 1.4 4区工程技术 Q2 ENGINEERING, AEROSPACE

Journal of the American Helicopter Society Pub Date : 2023-01-01 DOI:10.4050/jahs.68.042006

Sean Gauntt, S. McIntyre, R. Campbell

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Abstract

A hybrid gear concept that combines a metallic outer rim of gear teeth with a composite web to reduce drivetrain weight was evaluated for impact of tooth microgeometry modifications on transmission error. Control of transmission error through tooth microgeometry modification is important for control of noise and vibrations generated by a drivetrain. The added flexibility of hybrid gears over steel gears brings to question the performance of hybrid over conventional gears relative to their dynamic transmission error and resulting noise levels. Previously developed drivetrain models featuring hybrid spur gears were used to determine optimal tooth microgeometry modifications that minimized peak-to-peak transmission error. Static and dynamic transmission errors were then calculated using the optimal microgeometries and compared to results for a similarly optimized all-steel drivetrain. From the results, it appears that the use of hybrid gears will not negatively affect vibration performance for low- and medium-speed applications, as hybrid gear models predicted similar transmission errors to their all-steel counterparts. At higher speeds, drivetrains featuring hybrid gears were predicted to have significantly different transmission errors, but whether this difference was an improvement or detriment is design and speed-dependent. Therefore, careful design is necessary for high-speed hybrid gears.

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齿微几何优化对混合直齿轮传动系统静、动态传动误差的影响

一种混合齿轮概念，结合了金属外轮齿和复合腹板，以减少传动系统的重量，评估了齿微几何形状的变化对传动误差的影响。通过齿面微几何修正控制传动误差对于控制传动系统产生的噪声和振动具有重要意义。混合动力齿轮在钢齿轮上增加的灵活性带来了对混合动力齿轮相对于传统齿轮的性能的质疑，因为它们的动态传输误差和由此产生的噪音水平。先前开发的动力传动系统模型采用混合正齿轮来确定最佳的齿微几何形状修改，以最大限度地减少峰对峰传输误差。然后，使用最优微几何计算静态和动态传动误差，并与类似优化的全钢传动系统的结果进行比较。从结果来看，混合动力齿轮的使用似乎不会对低速和中速应用的振动性能产生负面影响，因为混合动力齿轮模型预测的传动误差与全钢齿轮模型相似。在更高的速度下，采用混合动力齿轮的传动系统预计会有显著不同的传动误差，但这种差异是改进还是损害取决于设计和速度。因此，对高速混合动力齿轮进行精心设计是必要的。

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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来源期刊

Journal of the American Helicopter Society 工程技术-工程：宇航

CiteScore

4.10

自引率

33.30%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of the American Helicopter Society is a peer-reviewed technical journal published quarterly (January, April, July and October) by AHS — The Vertical Flight Society. It is the world''s only scientific journal dedicated to vertical flight technology and is available in print and online. The Journal publishes original technical papers dealing with theory and practice of vertical flight. The Journal seeks to foster the exchange of significant new ideas and information about helicopters and V/STOL aircraft. The scope of the Journal covers the full range of research, analysis, design, manufacturing, test, operations, and support. A constantly growing list of specialty areas is included within that scope. These range from the classical specialties like aerodynamic, dynamics and structures to more recent priorities such as acoustics, materials and signature reduction and to operational issues such as design criteria, safety and reliability. (Note: semi- and nontechnical articles of more general interest reporting current events or experiences should be sent to the VFS magazine