| 胡兴龙1，2 ，李国权 1，2 ，侯宏建 1，2 ，苏壮1，2 ，谷智赢 1，2.发动机引气污染及滑油渗漏污染分析与改进[J].航空发动机,2025,51(6):138-144 |
| 发动机引气污染及滑油渗漏污染分析与改进 |
| Analysis of Aeroengine Bleed Air Pollution Causes and Mitigation of Lubricating Oil Leakage |
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| DOI： |
| 中文关键词: 引气系统 滑油渗漏 污染 轴承腔 航空发动机 |
| 英文关键词:bleed air system oil leakage pollution bearing chamber aeroengine |
| 基金项目:国防工业重点研究项目资助 |
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| 摘要点击次数: 1979 |
| 全文下载次数: 442 |
| 中文摘要: |
| 为了探寻航空发动机引气系统空气污染的原因并制定相应的解决方案，以典型的双转子涡扇发动机的引气系统流路为
研究对象，详细分析了发动机因工作环境污染、流道清洗液残留及密封装置滑油渗漏造成发动机引气污染的可能性，并针对每种
模式给出了应对措施。结果表明：渗漏的滑油粘附在发动机流道内，对引气造成持久污染，即滑油渗漏是发动机引气污染的主要
原因。通过协调滑油供回油系统以保证在任何工况下回供比满足设计要求、优化轴承腔回油结构以保证轴承腔内滑油不积聚、优
化封严腔漏油结构以保证渗漏的滑油不进入流道以及避免封严压差反向以实现密封装置工作正常。提出的解决方案能够有效地
提高发动机引气系统的空气质量，为发动机引气污染问题提供解决思路。 |
| 英文摘要: |
| To investigate the causes of air pollution in aeroengine bleed air systems and develop corresponding solutions, the flow
path of a typical twin-spool turbofan engine bleed air system was chosen as the research object. Detailed analyses were conducted on
potential pollution sources, including working environment pollution, flow passage cleaning fluid residues, and lubricating oil leakage from
sealing devices. Countermeasures were proposed for respective modes. The results show that oil leakage is the primary cause for bleed air
system pollution, as leaked oil adhering to the flow path causes persistent bleed air pollution. Effective solutions include coordinating the
oil supply and return system to ensure the return-to-supply ratio meets the design requirements under all operating conditions, optimizing
the oil return structures of bearing chambers to prevent oil accumulation, improving the oil scavenge structures of sealing cavities to prevent
lubricating oil from entering the flow path, and avoiding reverse sealing pressure differentials to ensure proper sealing device operation. The
proposed solutions can effectively improve the air quality of engine bleed air systems, offering practical approaches to resolving engine
bleed air pollution issues. |
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