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常见问题

挖掘机发动机掉速的原因有哪些?

日期:2021-10-22   来源:http://www.dybocheng.com
顾名思义,发动机掉速就是说挖机作业中发动机转速下降的故障,掉速的表现分为两种,一种时200转内的轻微掉速,还有就是300转以上的严重掉速,此时很有可能造成挖掘机突然熄火。挖掘机发动机掉速原因主要有以下8点。
As the name suggests, engine speed drop means the failure of engine speed drop during excavator operation. The performance of speed drop is divided into two types: a slight speed drop within 200 revolutions and a serious speed drop above 300 revolutions. At this time, it is likely to cause the excavator to suddenly shut down. There are 8 main reasons for engine speed drop of excavator.
挖掘机的柴油油路故障所致,一般的话当柴油油路阻塞时,就可能引起掉速现象。
It is caused by diesel oil circuit failure of excavator. Generally, when the diesel oil circuit is blocked, it may cause speed drop.
挖机的液压系统出现了故障,使得液压泵不能正常的改变排量,造成系统压力过高,掉速同时可能出现憋机故障。
The hydraulic system of the excavator has a fault, which makes the hydraulic pump unable to change the displacement normally, resulting in too high system pressure, speed drop and possible choke failure.
挖机发动机本身输出动力不足,输出功率低于额定功率,转速太低。还有就是主泵有问题所致。
The output power of the excavator engine itself is insufficient, the output power is lower than the rated power, and the speed is too low. There is also a problem with the main pump.
加长臂挖掘机
发动机使用燃油品质太差或燃油水含量过高,都会导致发动机的功率不足,造成掉速现象。
Poor fuel quality or high fuel water content of the engine will lead to insufficient power of the engine and speed loss.
当进气系统漏气或者阻塞,会造成发动机供气不足,造成燃油不充分燃烧,会出现掉速、冒黑烟故障。
When the air intake system leaks or is blocked, it will cause insufficient air supply to the engine, insufficient fuel combustion, speed loss and black smoke.
由于电磁阀间隙太大,使得供油不足,从而引起发动机掉速。
Due to the large clearance of the solenoid valve, the oil supply is insufficient, resulting in engine stall.
燃油系统供油回路管接头松动或管路破裂,引起燃油泄露或异物堵塞,导致供油不足,除了掉速还可能引起熄火问题。
The fuel supply circuit pipe joint of the fuel system is loose or the pipeline is broken, resulting in fuel leakage or foreign matter blockage, resulting in insufficient fuel supply. In addition to speed loss, it may also cause flameout.
掉速故障的原因还有很多,比如气门间隙不对、喷油定时有错、涡轮增压器损坏、制动器有毛病等等。
There are many reasons for speed failure, such as wrong valve clearance, wrong fuel injection timing, damaged turbocharger, defective brake and so on.


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