燃气发电机组运行异响？立即停机！常见原因及排查指南

　　Does the gas generator set make abnormal noises during operation? Stop the machine immediately! Common causes and troubleshooting guidelines

　　在燃气发电机组运行过程中，一旦听到不正常的异响，不少操作人员会犹豫：是继续观察还是立即停机？答案很明确——必须马上停机检查！异响绝非小问题，背后往往隐藏着部件磨损、松动或故障等隐患，若拖延不处理，小故障可能快速升级为严重损坏，不仅会导致机组停机检修，还可能造成高昂的维修成本，甚至引发安全事故。今天就为大家科普燃气发电机组异响的排查逻辑，拆解常见原因，帮大家精准应对。

　　During the operation of a gas generator set, if abnormal noises are heard, many operators may hesitate: should they continue to observe or immediately shut down? The answer is very clear - it must be stopped immediately for inspection! Abnormal noise is not a small problem, as it often hides hidden dangers such as component wear, looseness, or malfunction. If left untreated, small faults may quickly escalate into serious damage, not only causing the unit to shut down for maintenance, but also potentially leading to high maintenance costs and even safety accidents. Today, we will explain the troubleshooting logic for abnormal noises in gas generator sets, break down common causes, and help you respond accurately.

　　首先要明确，立即停机的核心目的是“止损”。燃气发电机组的运行依赖各部件的精密配合，正常工作时只会发出平稳、规律的运转声。一旦出现金属撞击声、尖锐摩擦声、沉闷敲击声等异常声响，说明某一环节已偏离正常工作状态：可能是部件间隙异常、紧固件松动，也可能是轴承磨损、活塞连杆故障等。继续运行会让受损部件进一步恶化，比如连杆松动可能导致曲轴弯曲，气门故障可能引发汽缸损坏，最终让小问题变成“毁灭性故障”，因此发现异响后，第一步必须是停机断电，待机组冷却后再开展排查。

　　Firstly, it should be clarified that the core purpose of immediate shutdown is to "stop loss". The operation of gas generator sets relies on the precise coordination of various components, and during normal operation, only a smooth and regular running sound will be emitted. Once abnormal sounds such as metal impact, sharp friction, and dull knocking occur, it indicates that a certain link has deviated from normal working conditions: it may be due to abnormal clearance between components, loose fasteners, bearing wear, piston connecting rod failure, etc. Continuing to operate will further deteriorate damaged components, such as loose connecting rods that may cause crankshaft bending, valve failures that may cause cylinder damage, ultimately turning small problems into "catastrophic failures". Therefore, the first step after discovering abnormal noises is to shut down the machine and power it off, and conduct troubleshooting after the unit has cooled down.

　　排查异响的关键是“定位声源”，不同部位的异响对应不同的故障类型，实操中可按以下部位逐一排查：

　　The key to troubleshooting abnormal noises is to "locate the sound source". Different parts of the abnormal noise correspond to different types of faults. In practice, the following parts can be checked one by one:

　　第一类是机体内部异响，这是最需要警惕的情况，多与核心运动部件故障相关。若异响来自机体内部，打开机体侧盖板后，可用手推动连杆中间位置检查：若推动时异响集中在连杆上部，大概率是活塞与连杆铜套出现磨损或间隙过大，运转时活塞与铜套发生撞击产生声响；若异响在连杆下部，则要重点排查曲轴轴承故障，比如轴承磨损、润滑不足导致的金属摩擦声。此外，活塞环损坏、汽缸壁磨损也可能在机体内部产生“噗噗”或撞击声，需拆解后进一步检查。

　　The first type is abnormal noise inside the body, which is the most alarming situation and is often related to the failure of core moving parts. If the abnormal noise comes from inside the body, after opening the side cover plate of the body, you can manually push the middle position of the connecting rod to check: if the abnormal noise is concentrated on the upper part of the connecting rod during pushing, it is likely that the piston and the connecting rod copper sleeve are worn or have excessive clearance, and the piston and copper sleeve collide during operation to produce sound; If the abnormal noise is in the lower part of the connecting rod, it is necessary to focus on investigating crankshaft bearing faults, such as metal friction noise caused by bearing wear and insufficient lubrication. In addition, damaged piston rings and worn cylinder walls may also produce a "pop" or impact sound inside the body, which needs to be disassembled for further inspection.

　　第二类是气门室内部异响，常见表现为尖锐的“哒哒”声。这类异响多与气门机构故障相关，比如气门间隙过大，导致气门开启和关闭时与摇臂发生剧烈撞击；也可能是气门弹簧损坏、摇臂磨损，使得气门运动不规律，产生异常声响。排查时可打开气门室盖，检查气门间隙是否符合规范，查看气门弹簧是否断裂、摇臂是否存在磨损痕迹。

　　The second type is abnormal noise inside the valve chamber, commonly manifested as a sharp "dada" sound. This type of abnormal noise is often related to valve mechanism failures, such as excessive valve clearance, which causes severe impact with the rocker arm when the valve opens and closes; It is also possible that the valve spring is damaged or the rocker arm is worn, causing irregular valve movement and abnormal noise. When troubleshooting, the valve cover can be opened to check whether the valve clearance meets the specifications, whether the valve spring is broken, and whether there are wear marks on the rocker arm.

　　第三类是前盖板处异响，多为齿轮或传动部件故障。前盖板内包含正时齿轮、水泵等关键部件，若出现“咔咔”的齿轮撞击声，可能是正时齿轮磨损严重、齿面损坏，或齿轮间隙过大；若伴随“嗡嗡”声和振动，需检查水泵轴承是否磨损、水泵叶轮是否松动，这些问题都会导致前盖板区域出现明显异响。

　　The third type is abnormal noise at the front cover plate, mostly caused by gear or transmission component failures. The front cover plate contains key components such as timing gears and water pumps. If there is a "clicking" sound of gear impact, it may be due to severe wear of the timing gears, damaged tooth surfaces, or excessive gear clearance; If accompanied by a buzzing sound and vibration, it is necessary to check whether the water pump bearings are worn and whether the water pump impeller is loose, as these issues can cause significant abnormal noise in the front cover area.

　　第四类是发电机与柴油机接合处异响，重点排查联轴器故障。若此处出现金属摩擦声或振动异响，大概率是联轴器连接松动、同轴度偏差过大，导致运转时发生碰撞；也可能是联轴器弹性垫损坏，失去缓冲作用，使得两轴运转不同步，产生异常声响。排查时需检查联轴器的紧固螺栓，测量同轴度，更换损坏的弹性垫。

　　The fourth type is abnormal noise at the junction of the generator and diesel engine, with a focus on investigating coupling faults. If there is metal friction or vibration noise here, it is highly likely that the coupling connection is loose or the coaxiality deviation is too large, resulting in collision during operation; It is also possible that the elastic pad of the coupling is damaged, losing its buffering effect, causing the two shafts to run out of sync and produce abnormal noise. When troubleshooting, it is necessary to check the fastening bolts of the coupling, measure coaxiality, and replace damaged elastic pads.

　　第五类是汽缸内异响，常见于爆震或活塞故障。若出现尖锐的爆震声，可能是燃气混合比不当、点火时间过早，导致可燃气体在汽缸内提前燃烧引发冲击；若伴随“当当”的撞击声，需检查活塞环是否断裂、活塞销是否松动，这些部件故障会让活塞在汽缸内运动异常，产生撞击异响。

　　The fifth type is abnormal noise inside the cylinder, commonly caused by detonation or piston failure. If there is a sharp knocking sound, it may be due to improper gas mixing ratio or premature ignition time, which causes the combustible gas to burn prematurely in the cylinder and cause impact; If accompanied by the sound of "Dangdang" impact, it is necessary to check whether the piston ring is broken and whether the piston pin is loose. These component failures can cause the piston to move abnormally in the cylinder, resulting in abnormal impact noise.

　　最后要提醒的是，排查异响时需遵循“先观察后拆解”的原则，先通过声源定位缩小故障范围，再进行针对性检查，避免盲目拆卸造成二次损坏。日常运维中，定期检查部件间隙、紧固状态和润滑情况，能有效减少异响故障的发生。

　　Finally, it should be reminded that when troubleshooting abnormal noises, the principle of "observation before disassembly" should be followed. First, the fault range should be narrowed down through sound source localization, and then targeted inspections should be carried out to avoid blind disassembly and secondary damage. In daily operation and maintenance, regularly checking the clearance, fastening status, and lubrication of components can effectively reduce the occurrence of abnormal noise faults.

　　总之，燃气发电机组运行中的异响是“故障预警信号”，立即停机是首要原则。掌握按部位排查异响的方法，能帮助快速定位故障、精准处理，保障机组的安全稳定运行。若对排查流程不熟悉，建议联系专业维修人员，避免因操作不当扩大故障范围。

　　In short, the abnormal noise during the operation of gas generators is a "fault warning signal", and immediate shutdown is the primary principle. Mastering the method of identifying abnormal noises by location can help quickly locate faults, accurately handle them, and ensure the safe and stable operation of the unit. If you are not familiar with the troubleshooting process, it is recommended to contact professional maintenance personnel to avoid expanding the scope of the fault due to improper operation.

　　本文由  燃气发电机组 友情奉献.更多有关的知识请点击  http://www.huannengpower.com/   真诚的态度.为您提供为全面的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from a gas generator set For more related knowledge, please click http://www.huannengpower.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.