Fault phenomenon: A Cummins supercharged medium-cooled diesel generator has a strange fault during use. After each start of the Cummins generator, the ignition speed is normal. As long as the load is loaded for about 7 minutes, it will automatically Turn off the fire.
Fault phenomenon: A Cummins supercharged medium-cooled diesel generator has a strange fault during use. After each start of the Cummins generator, the ignition speed is normal. As long as the load is loaded for about 7 minutes, it will automatically Turn off the fire.
It can be started immediately after the flameout, but it will automatically turn off after about 7 minutes of running with load. What is the reason for this?
Trouble shooting: According to the usual practice, it is generally considered that the Cummins diesel generator oil circuit system is caused by gas, blockage or joint sealing is not strict, but specific to the diesel generator, maintenance personnel first check the oil system, filter and other related No faults were found in the components, such as air leakage or blockage; no problems were found in the inspection of the oil pump and fuel injectors. In addition, the valve clearance and injection advance angle of the diesel generator were also checked and adjusted. exist.
Analysis of the cause of the failure: After the technician analysis, the check valve of the generator was not damaged, only a small amount of dust or dust adhered to the steel ball and sealing belt of the engine oil return check valve, causing it to close. If it is not strict, it will cause the operation failure of the generator set. It looks very simple, but from the failure to the exclusion of the fault, tossed for several days. In fact, at the beginning, it was suspected that there was a problem with the oil return bolt. However, when the oil pump was pumped by the hand oil pump, the pressure of the oil circuit system was basically normal, and there was a clear oil return sound of the oil returning single bolt.
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