机械故障

　　Mechanical malfunction

　　机械故障的排查应该分系统排查，根据故障原因及数据分析确定哪个系统发生故障而导致的停机，如果是燃气系统故障，则可能出现计量阀是否卡涩，在启动过程中计量阀的开度会出现一个不停变化的过程，若此时计量阀未开启或保持某一数值则说明计量阀已卡涩，需要立即维护或者更换；

　　The investigation of mechanical faults should be carried out systematically, and the system that caused the shutdown should be determined based on the cause of the fault and data analysis. If it is a gas system fault, there may be a blockage in the metering valve. During the start-up process, the opening of the metering valve will change continuously. If the metering valve does not open or maintain a certain value at this time, it indicates that the metering valve has become stuck and needs to be maintained or replaced immediately;

　　检查节气阀是否开启，由于机组的设计缺陷导致节气阀距离涡轮增压器的位置较近，长期的高温环境会引起节气阀损坏，若启动过程中未发现节气阀开启，则需要检查维修，必要时更换节气阀；检查火花塞是否点火。

　　Check if the throttle valve is open. Due to design defects of the unit, the throttle valve is located close to the turbocharger, and long-term high temperature environment can cause damage to the throttle valve. If the throttle valve is not found to be open during the start-up process, it needs to be inspected and repaired, and if necessary, replaced; Check if the spark plug ignites.

　　长期停机会导致机组燃烧室内凝结水分附着在火花塞上，导致其不能顺利点火。

　　Long term shutdown can cause condensed water in the combustion chamber of the unit to adhere to the spark plug, resulting in its inability to ignite smoothly.

　　观察机组的排气温度情况，若发现某缸出现异常缸温时，说明此缸未点火或点火不正常，此时需要更换新火花塞，并将取下的火花塞烘干备用；

　　Observe the exhaust temperature of the unit. If abnormal cylinder temperature is found in a certain cylinder, it indicates that the cylinder has not been ignited or ignited abnormally. At this time, it is necessary to replace the spark plug with a new one and dry the removed spark plug for later use;

　　检查气门间隙是否合适。

　　Check if the valve clearance is appropriate.

　　取下机组摇臂室罩壳，用塞尺测量气门间隙，将其间隙调整为进气侧0.38mm±0.02 mm，排气侧1.12 mm±0.02 mm。

　　Remove the rocker arm chamber cover of the unit, measure the valve clearance with a feeler gauge, and adjust the clearance to 0.38mm ± 0.02 mm on the intake side and 1.12 mm ± 0.02 mm on the exhaust side.

　　运行过程中出现水温过高，则可能是冷却系统出现故障，冷却液不足导致换热不良；

　　If the water temperature is too high during operation, it may be due to a malfunction in the cooling system, where insufficient coolant leads to poor heat exchange;

　　散热水箱风扇故障，导致散热不足，这时应对故障的散热水箱进行修复；

　　The fan of the cooling water tank is malfunctioning, resulting in insufficient heat dissipation. In this case, the faulty cooling water tank should be repaired;

　　节温器降温效果不理想也可能引起水温的升高，检查节温器，必要时进行更换，中冷水温度升高可能因为中冷器的堵塞造成循环不畅，同时还会引起燃气温度升高而导致的非正常燃烧停机。

　　Poor cooling effect of the thermostat may also cause an increase in water temperature. Check the thermostat and replace it if necessary. The increase in intercooler temperature may be caused by blockage, resulting in poor circulation and abnormal combustion shutdown due to gas temperature rise.

　　运行过程中出现水压升高，则可能是由于燃烧室密封不严，气体进入水循环系统，导致水压异常升高，这时应对气缸盖进行缸压测试，确定需要更换气缸盖。

　　If there is an increase in water pressure during operation, it may be due to poor sealing of the combustion chamber and gas entering the water circulation system, resulting in an abnormal increase in water pressure. At this time, a cylinder head pressure test should be conducted to determine the need to replace the cylinder head.

　　也可能是由于压力传感器异常导致；

　　It may also be caused by abnormal pressure sensors;

　　水压降低可能是管路有渗漏的地方，应检查管路是否渗漏。

　　The decrease in water pressure may be due to leaks in the pipeline, and the pipeline should be checked for leaks.

　　运行过程中机油温度异常升高，可能是由于油冷器堵塞导致机油冷却效果降低，也可能由于冷却液密封老化或水腔开裂导致冷却液窜入机油后，经机械搅拌使水和油混合后出现乳化，发现此情况应立即更换机油、机滤并冲洗油路，否则乳化的机油会使机组发生更严重的事故，比如连杆、曲轴等因润滑不到位而出现故障。

　　The abnormal increase in oil temperature during operation may be due to blockage of the oil cooler, which reduces the cooling effect of the oil. It may also be due to aging of the coolant seal or cracking of the water chamber, causing the coolant to enter the oil and mix with water and oil through mechanical stirring, resulting in emulsification. If this situation is found, the oil, filter, and oil circuit should be replaced immediately. Otherwise, the emulsified oil will cause more serious accidents in the unit, such as connecting rods, crankshafts, etc., which may malfunction due to inadequate lubrication.

　　运行过程中油压异常升高，可能是由机油管路堵塞造成，应检查油冷器是否堵塞，检查机组是否存在内漏，燃气系统是否因为密封不严导致有气体进入曲轴箱导致机油压力升高。

　　During operation, the abnormal increase in oil pressure may be caused by blockage in the oil pipeline. It is necessary to check whether the oil cooler is blocked, whether there is internal leakage in the unit, and whether the gas system has gas entering the crankcase due to poor sealing, resulting in an increase in oil pressure.

　　机油传感器异常导致机油压力升高。

　　Abnormal oil sensor causes an increase in oil pressure.

　　应检查机油级别是否与使用条件相符。

　　The oil level should be checked to ensure it matches the usage conditions.

　　油压降低机油滤芯太脏导致油压损失大，机油管路有泄漏导致油压降低，机油泵损坏或者机油泵端面密封不严导致泵油能力不足。

　　The decrease in oil pressure is caused by the dirty oil filter, resulting in significant oil pressure loss. Leakage in the oil pipeline leads to a decrease in oil pressure, and damage to the oil pump or inadequate sealing of the oil pump end face results in insufficient pumping capacity.

　　运行过程中排温过高多，是由空燃比调节不当或进气量波动引起的。

　　Excessive exhaust temperature during operation is caused by improper adjustment of air-fuel ratio or fluctuations in intake air volume.

　　发现排温报警后，应立即降低负荷并对燃气热值数值进行修改，在调整过程中不应变化过快，注意机组的负荷波动及节气阀的开度配合，逐步将机组调整至最佳运行工况，涡轮增压器异常也会导致机组排温多高，由于涡轮增压器的出力不足导致废气不能完全排除，产生排温过高的报警，此时应对涡轮增压器进行维修。

　　After discovering the exhaust temperature alarm, the load should be immediately reduced and the gas calorific value value should be modified. During the adjustment process, it should not change too quickly. Pay attention to the load fluctuation of the unit and the coordination of the throttle valve opening. Gradually adjust the unit to the optimal operating condition. Abnormal turbocharger can also cause high exhaust temperature of the unit. Due to insufficient output of the turbocharger, the exhaust gas cannot be completely discharged, resulting in an alarm of high exhaust temperature. At this time, the turbocharger should be repaired.

　　运行过程中机组发生二级或三级爆震，首先应查看是否进气压力过高导致发动机负载过高，此时应通过预处理系统和调压阀将进气压力调整至 30kPa

　　During operation, if the unit experiences secondary or tertiary detonation, the first thing to check is whether the intake pressure is too high, causing the engine load to be too high. At this time, the intake pressure should be adjusted to 30kPa through the pre-treatment system and pressure regulating valve

　　附近。其次检查是否由燃气进气温度过高引起爆震。

　　Nearby. Next, check if the detonation is caused by high gas intake temperature.

　　此时应通过降低预处理出口燃气温度和检查中冷水液位来确定是由哪个引起的燃气温度高，如果都正常则要考虑中冷器是否被堵塞。

　　At this point, the cause of the high gas temperature should be determined by reducing the pre-treatment outlet gas temperature and checking the intermediate cooling water level. If both are normal, it is necessary to consider whether the intermediate cooler is blocked.

　　燃烧室积碳也是引起爆震的主要原因，而发动机机油过满引起内部泄露在燃烧室内形成沉淀物。

　　Carbon buildup in the combustion chamber is also a major cause of detonation, while excessive engine oil can lead to internal leakage and the formation of deposits in the combustion chamber.

　　使用管道内孔探测镜来检查气缸，主要检查气门座、气门面、活塞冲程上限以上的气缸壁、内部机油泄露，如果发现过量沉淀物或有内部泄露的现象，应根据现场情况组织内部修理。

　　Use a pipeline inner hole detection mirror to inspect the cylinder, mainly checking the valve seat, valve face, cylinder wall above the upper limit of piston stroke, and internal oil leakage. If excessive sediment or internal leakage is found, internal repairs should be organized according to the on-site situation.

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