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Equipment GB-101
FM gb_lubrication_oil_degradation
ISO 14224 mode Gearbox lube degradation Gearbox lube degradation
Source synthetic + standards-based engineering estimate (ISO 14224 / API / IEC 61511 框架归类)
润滑油降解
GB-101 · Gearbox (Speed Reducer/Increaser)
Related equipment → GB-101
0.82Source conf.
—Evidence conf.
Gearbox lube degradationISO 14224 mode
1Failure Mechanism
Function:形成弹性流体润滑膜
Failure cause:氧化/热降解致黏度下降
Damage mechanism：润滑油氧化稠化/黏度变化，膜厚不足（API 677 润滑规范）
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 677 — General-purpose Gear Units · 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 677ISO 6336AGMA 2001ISO 14224:2016GB/T 3480GB/T 6075ISO 13372API 580GB/T 7826-2012SAE JA1011_202411
No separate clause reference.
6Derived Analysis (seeded from this FM)
4/4/4FMEA Sev/Occ/Det
0.29RBI λ
0.85Monitor pdet
6 月Insp. int.
Current tasks:油黏度/酸值分析 | 定期换油
RCFA incident:润滑油降解：氧化/热降解致黏度下降，后果类型 Operational，严重度 4
7RCM Maintenance Decision (strategy landing)
CBMOn-Condition Maintenance
Recommended task状态监测/定期检查, 按趋势与阈值管理
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=(无显式机理信号, 由 current_tasks 推导)
Governing standardsAPI 581厂家规范
⚠ 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。