柴油发电机组运行一段时间后，增压器出口、中冷器或排气管接口出现油迹，这是常见反馈。多数人第一反应是增压器油封坏了，实际拆下来一查，增压器往往没坏——油是从别处来的。

渗油只有三个来路

一是增压器浮动轴承处的油封，压气机端或涡轮端渗油；二是曲轴箱下窜气，活塞环磨损后高压燃气窜进曲轴箱，油气顺呼吸器管进进气管；三是气门导管与气门油封。三者油迹位置不同，判定方法也不同。

由外到内查一遍

先看油挂在哪：只在增压器出口挂油，查增压器；进气歧管、中冷器普遍有油膜，先怀疑呼吸器带油。再拔下曲轴箱呼吸器管，怠速时拿张纸放在管口，纸被明显吹动且有脉动，说明下窜气偏大，方向指向活塞环。最后量轴的径向间隙，通常不宜超过 0.1 毫米一档；叶轮能蹭到壳体，说明轴承已失效。

怠速和低负载会加重渗油

这条最容易被忽略。增压器两端靠压差封油，怠速或低负载时增压压力低、回油不畅，油容易被挤过油封。备用机组常年低负载运行，渗油反而比满负载机组更常见。遇到这类渗油，先把机组拉去带载跑一段，轻度油迹往往会自行减少。

误判的代价

把下窜气当成增压器故障，换一只增压器通常要数千元，装回去照样渗油。反过来，轴承真废了不处理，叶轮刮壳、碎片进气缸，代价是整个增压器和活塞组。顺序是先分清来源再动手；渗油量小又无其他异常时，可以先记录观察。

发电机组运行一段时间后，增压器出口、中冷器或排气管接口出现油迹，这是常见反馈。多数人第一反应是增压器油封坏了，实际拆下来一查，增压器往往没坏——油是从别处来的。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"C1parYSXn8MrboI9efXSpF","blockSubtree":{"block":{"C1parYSXn8MrboI9efXSpF":{"role":"editor","value":{"id":"C1parYSXn8MrboI9efXSpF","parentId":"","type":"text","props":{"title":[["渗油只有三个来路",[["b"]]]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"y1vHhOcbEPd8s7B3tvNyPe","blockSubtree":{"block":{"y1vHhOcbEPd8s7B3tvNyPe":{"role":"editor","value":{"id":"y1vHhOcbEPd8s7B3tvNyPe","parentId":"","type":"text","props":{"title":[["一是增压器浮动轴承处的油封，压气机端或涡轮端渗油；二是曲轴箱下窜气，活塞环磨损后高压燃气窜进曲轴箱，油气顺呼吸器管进进气管；三是气门导管与气门油封。三者油迹位置不同，判定方法也不同。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"RUEBIF7gZRKX6pe57vXTnl","blockSubtree":{"block":{"RUEBIF7gZRKX6pe57vXTnl":{"role":"editor","value":{"id":"RUEBIF7gZRKX6pe57vXTnl","parentId":"","type":"text","props":{"title":[["由外到内查一遍",[["b"]]]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"YrlIeugxsvWp6GMvZdLNFr","blockSubtree":{"block":{"YrlIeugxsvWp6GMvZdLNFr":{"role":"editor","value":{"id":"YrlIeugxsvWp6GMvZdLNFr","parentId":"","type":"text","props":{"title":[["先看油挂在哪：只在增压器出口挂油，查增压器；进气歧管、中冷器普遍有油膜，先怀疑呼吸器带油。再拔下曲轴箱呼吸器管，怠速时拿张纸放在管口，纸被明显吹动且有脉动，说明下窜气偏大，方向指向活塞环。最后量轴的径向间隙，通常不宜超过 0.1 毫米一档；叶轮能蹭到壳体，说明轴承已失效。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"PtqsRHyWWekMEyGuiNDRyD","blockSubtree":{"block":{"PtqsRHyWWekMEyGuiNDRyD":{"role":"editor","value":{"id":"PtqsRHyWWekMEyGuiNDRyD","parentId":"","type":"text","props":{"title":[["怠速和低负载会加重渗油",[["b"]]]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"ZaL0BVuAGnEl8pTcL8KGiF","blockSubtree":{"block":{"ZaL0BVuAGnEl8pTcL8KGiF":{"role":"editor","value":{"id":"ZaL0BVuAGnEl8pTcL8KGiF","parentId":"","type":"text","props":{"title":[["这条最容易被忽略。增压器两端靠压差封油，怠速或低负载时增压压力低、回油不畅，油容易被挤过油封。备用机组常年低负载运行，渗油反而比满负载机组更常见。遇到这类渗油，先把机组拉去带载跑一段，轻度油迹往往会自行减少。",null]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"D2mGNAT8dASKpDd9wPfAin","blockSubtree":{"block":{"D2mGNAT8dASKpDd9wPfAin":{"role":"editor","value":{"id":"D2mGNAT8dASKpDd9wPfAin","parentId":"","type":"text","props":{"title":[["误判的代价",[["b"]]]]},"children":[],"parentTable":"block","enabled":true}}}}},{"blockId":"pKWmczU4ZIn72sZlI4sVnM","blockSubtree":{"block":{"pKWmczU4ZIn72sZlI4sVnM":{"role":"editor","value":{"id":"pKWmczU4ZIn72sZlI4sVnM","parentId":"","type":"text","props":{"title":[["把下窜气当成增压器故障，换一只增压器通常要数千元，装回去照样渗油。反过来，轴承真废了不处理，叶轮刮壳、碎片进气缸，代价是整个增压器和活塞组。顺序是先分清来源再动手；渗油量小又无其他异常时，可以先记录观察。",null]]},"children":[],"parentTable":"block","enabled":true}}}}}]">

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