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Plain Bearing Selection for Landing Gear Applications 起落架用滑动轴承的选择
发布日期: 2023-08-23
本文件旨在为选择最适合飞机起落架应用的滑动轴承和轴承材料提供咨询信息。本文所含信息来源于轴承测试和服务经验/报告。机身/起落架制造商、商业航空公司、美国空军和海军航空系统司令部为该文件提供了输入。提供了有关轴承安装方法和配件的信息,这些方法和配件具有令人满意的性能和使用寿命。基底金属腐蚀是起落架轴承安装问题的主要原因。因此,本文讨论了防腐蚀的方法,旨在尽量减少起落架轴承的维护和最大化其预期寿命。还讨论了润滑轴承和自润滑轴承。 对于飞机起落架的应用,有广泛的轴承载荷和运动要求。因此,设计者有责任选择与特定应用相关的信息。防摩擦轴承,定义为车轮和活轴应用中通常使用的滚动元件轴承,本文件中不会讨论。许多飞机制造商和政府环境机构禁止使用铜铍(Cu-be)合金材料进行新设计,因此新设计采用了适当设计的替代轴承材料,如铜镍锡(Cu-Ni-Sn)合金。AIR5883中涵盖了起落架减震支柱轴承设计和选择标准,因此,在本文档中未详细讨论。
This document is intended to give advisory information for the selection of plain bearings and bearing materials most suitable for aircraft landing gear applications. Information included herein was derived from bearing tests and service experience/reports. Airframe/landing gear manufacturers, commercial airlines, the U.S. Air Force and Naval Air Systems Command provided input for the document.Information is given on bearing installation methods and fits that have given satisfactory performance and service life.Base metal corrosion is a major cause of problems in bearing installations for landing gears. Therefore, methods of corrosion prevention are discussed.Effort is directed toward minimizing maintenance and maximizing life expectancy of landing gear bearings. Lubricated and self-lubricating bearings are also discussed.There are wide ranges of bearing load and motion requirements for applications in aircraft landing gears. For this reason, it is the responsibility of the designer to select that information which pertains to the particular application.Anti-friction bearings, defined as rolling element bearings generally used in wheel and live axle applications, will not be discussed in this document.Copper-Beryliium (Cu-Be) alloy material has been banned for new design by many airframers and government environmental agencies, therefore new designs are utilizing properly designed alternative bearing material such as Copper Nickel Tin (Cu-Ni-Sn) alloy.Landing gear shock strut bearing design and selection criteria are covered in AIR5883 and, therefore, are not discussed in detail in this document.
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