机械振动.装有主动磁性轴承的旋转机械的振动.第5部分:触地轴承

[中文适用范围]： 本文件提供了识别以下内容的指南：a) 接触式轴承系统的典型结构，以显示哪些组件可能组成此类系统以及这些组件提供哪些功能；注：接触式轴承也称为“备用轴承”、“辅助轴承”、“制动轴承”或“着陆轴承”。在本文件中，“接触式轴承”一词仅按 ISO 14839-1 中的定义使用。b) 接触式轴承系统的功能要求，以便可以设定明确的性能目标；c) 动态系统设计中需要考虑的因素，以便可以优化接触式轴承和主动磁轴承 (AMB) 的转子动力学性能；d) 对接触式轴承系统性能有重大影响的环境因素，从而可以优化整体机器设计；e) 可能导致接触式轴承系统内接触的 AMB 运行条件，以便可以将此类事件视为整体机器设计的一部分。它还考虑了 AMB 系统内可能导致接触事件的故障模式。这确保了触地轴承的规范涵盖了所有的运行要求；f) 最常见的触地轴承故障模式和管理这些事件的典型机制；g) 触地轴承系统设计过程的典型要素，包括载荷要求的规范、尺寸确定过程、用于设计验证的分析和模拟方法；h) 设计触地轴承系统验收测试程序时要考虑的参数，包括要指定的测试条件和用于确保成功执行测试的相关仪器；i) 允许评估在用触地轴承状态并在必要时确定要采取的纠正措施的状态监测和检查方法；j) 设计触地轴承系统维护制度时要考虑的因素，包括在发生指定事件后要采取的行动以及定期执行的任何行动；k) 有关其他生命周期主题（例如报废管理、退役和处置）要考虑的因素。1 [外文原描述]： This document gives guidelines for identifying: a) The typical architectures of touch-down bearing systems to show which components are likely to comprise such systems and which functions these components provide; NOTE Touch-down bearings are also known as “backup bearings”, “auxiliary bearings”, “catcher bearings” or “landing bearings”. Within this document, the term “touch-down bearings” is used exclusively as defined in ISO 14839‑1. b) The functional requirements for touch-down bearing systems so that clear performance targets can be set; c) Elements to be considered in the design of the dynamic system such that rotordynamic performance can be optimized, both for touch-down bearings and active magnetic bearings (AMBs); d) The environmental factors that have significant impact on touch-down bearing system performance allowing optimization of overall machine design; e) The AMB operational conditions that can give rise to contact within the touch-down bearing system so that such events can be considered as part of an overall machine design. It also considers failure modes within the AMB system that can give rise to a contact event. This ensures that the specification of the touch-down bearings covers all operational requirements; f) The most commonly encountered touch-down bearing failure modes and typical mechanisms for managing these events; g) Typical elements of a design process for touch-down bearing systems including the specification of load requirements, the sizing process, the analytical and simulation methods employed for design validation; h) The parameters to be taken into account when designing a touch-down bearing system acceptance test programme including the test conditions to be specified and the associated instrumentation to be used to ensure successful test execution; i) The condition monitoring and inspection methods that allow the status of in-service touch-down bearings to be evaluated and when necessary identifying the corrective actions to be taken; j) The factors to be considered when designing the maintenance regime for a touch-down bearing system including the actions to be taken after specified events have occurred together with any actions to be performed on a regular basis; k) The factors to be considered regarding other life cycle topics (e.g. obsolescence management, de-commissioning and disposal).