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Equipment MOT-101
FM bearing_inner_race_defect
ISO 14224 mode Bearing inner race defect Bearing inner race defect
Source synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类)
轴承内圈缺陷
MOT-101 · Electric Motor (Driver)
Related equipment → MOT-101
0.82Source conf.
—Evidence conf.
Bearing inner race defectISO 14224 mode
1Failure Mechanism
Function:支撑转子并传递载荷
Failure cause:循环载荷 + 内部缺陷萌生疲劳裂纹
Damage mechanism：滚动轴承内圈滚道接触疲劳（ISO 15243 类 A 型），在交变赫兹应力下萌生点蚀并扩展
2Source Basis (where this FM comes from)
synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类)
Source confidence 0.82: this FM is derived from the ontology KB and cross-validated by synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类).
3Evidence Chain (supporting basis)
This FM has no offline curated evidence text; it is derived from the ontology KB and cross-validated by the listed standard clauses and related accident investigations.
Governing standards (evidence)：std:API 541 — Form-Wound Squirrel Cage Induction Motors—500 HP and Larger · 机理级工程估计，非实测；引用 governing standard 作为分类出处std:ISO 13372 — Condition monitoring and diagnostics of machines—General guidelines · 机理级工程估计，非实测；引用 governing standard 作为分类出处
4Related Real Accidents (traceable to accident cards)
This FM is recorded in 2 real accident investigation(s); tap the report no. to open the corresponding accident lesson card.
5Applicable Standards & Clauses
API 541IEEE 841ISO 14224:2016GB/T 6075ISO 13372API 580GB/T 7826-2012SAE JA1011_202411
No separate clause reference.
6Derived Analysis (seeded from this FM)
6/4/4FMEA Sev/Occ/Det
0.22RBI λ
0.9Monitor pdet
6 月Insp. int.
Current tasks:振动频谱监测（BPFO 边带） | 定期润滑油铁谱分析
RCFA incident:轴承内圈缺陷：循环载荷 + 内部缺陷萌生疲劳裂纹，后果类型 Operational，严重度 6
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task无损检测(UT/MT/PT) 监测裂纹萌生, 关键转动件定时拆检; 无损检测(UT/VT/MT/PT), 按 API 581 RBI 风险定级设定检验间隔; 振动频谱分析 + 动平衡 + 激光对中, 状态监测趋势管理; 绝缘/电气试验 + 继电保护定值校核 + 操动机构特性测试
Suggested intervalHigh risk 1-3 mo / Medium 6-12 mo / Low risk at turnaround (by API 581 RBI risk ranking)
Decision basis机理类别=corrosion; electrical; fatigue; vibration
Governing standardsAPI 570API 571API 579API 581API 612API 670API 684ASME VIIIGB/T 14285IEC 60034IEEE C57ISO 10816
⚠ This decision is engineering-inferred by RCM logic from the damage mechanism / root cause / failure cause — it is not derived from measured site history. Confirm with the equipment owner and process before execution.
⚠ 本卡技术正文（功能 / 致因 / 损伤机理 / RCFA 叙事）保留中文原文——依可信 AI 红线，自由技术文本不自动机翻、不编造英文译文。UI、设备类型、FM 名、ISO 码、标准号均为英文。