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首页> 外文期刊>Journal of the American Helicopter Society >Evaluation Testing of Ceramic Hybrid Bearings for Helicopter Hanger Bearing Applications
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Evaluation Testing of Ceramic Hybrid Bearings for Helicopter Hanger Bearing Applications

机译：用于直升机吊架轴承的陶瓷混合轴承评估测试

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Ceramic hybrid bearings are like conventional bearings, except that the steel rolling elements have been replaced with ceramic elements. The ceramic rolling elements in hybrid bearings offer many benefits, including low density, high hardness, low thermal growth effect, corrosion resistance, and favorable frictional characteristics. However, damage detection for ceramic hybrid bearings has been an issue in the aerospace industry since their introduction. In the aerospace industry, the lack of effective and reliable silicon nitride detection devices limits the immediate use of ceramic hybrid bearings to applications that do not depend on continuous and automatic health monitoring devices, but instead require monitoring by maintenance personnel. One such application is the helicopter tail rotor drive shaft hanger bearing. Typically, tail rotor drive shaft hanger bearings have no in-flight damage detection system. Bearing damage is detected by manually rotating the bearing and feeling for any perceived roughness. Hanger bearings are often configured as sealed grease packed bearings. Many of these bearings also have means provided for regreasing. The objective of this paper is to present the results of a series of tests designed to determine the suitability of ceramic hybrid bearings in helicopter hanger bearing applications. The discussion includes the results of 100- and 200-h side-by-side hybrid and steel bearing endurance tests. In addition, the results of a 100-h run-dry hybrid bearing test, conducted at the same load and speed as the endurance test, are presented. Finally, ceramic hybrid bearing failure modes are discussed, damage detection methods for hanger bearing applications are proposed, and data taken from a single, extreme load test are discussed.
机译：陶瓷混合轴承与常规轴承类似，不同之处在于钢制滚动元件已由陶瓷元件代替。混合轴承中的陶瓷滚动体具有许多优点，包括低密度，高硬度，低热增长效应，耐腐蚀性和良好的摩擦特性。然而，自从陶瓷混合轴承引入以来，其损坏检测一直是航空航天工业中的一个问题。在航空航天工业中，缺乏有效且可靠的氮化硅检测设备将陶瓷混合轴承的立即使用限制在不依赖于连续自动健康监测设备，而是需要维护人员进行监测的应用中。一种这样的应用是直升机的尾桨驱动轴悬挂轴承。通常，尾桨驱动轴悬挂轴承没有飞行中损坏检测系统。通过手动旋转轴承并感觉是否有任何粗糙感来检测轴承损坏。吊架轴承通常配置为密封的油脂填充轴承。这些轴承中的许多轴承也具有用于再润滑的装置。本文的目的是提供一系列旨在确定陶瓷混合轴承在直升机吊架轴承应用中的适用性的测试结果。讨论内容包括100和200小时并排混合动力和钢轴承耐久性测试的结果。此外，还提供了在与耐久试验相同的负载和速度下进行的100小时干混混合轴承试验的结果。最后，讨论了陶瓷混合轴承的失效模式，提出了适用于吊架轴承的损伤检测方法，并讨论了来自单个极限载荷测试的数据。

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