After the bushing of the turbocharger is seized, the power of the Cummins diesel generator will drop sharply.
After the bushing of the turbocharger is seized, the power of the Cummins diesel generator will drop sharply.
The turbocharger is mainly composed of turbine and compressor impeller and bearings installed on the same shaft. The blades of the compressor impeller are forward and backward curved to improve the efficiency of the compressor. The turbine casing is a double-chamber vortex with a bladeless nozzle. The turbine and shaft are welded together, and the bearing system adopts full floating sliding bearing, which is a powder metallurgy thrust bearing with good oil storage performance, and piston ring type sealing rings are used at both ends. The direction of the compressor air outlet and the air inlet of the turbine casing can be adjusted arbitrarily to meet the importance of different models. However, the speed of the turbocharger will exceed 100,000 rpm under the rated operating conditions of the engine.
When the Cummins diesel generator is working, the speed should not be increased instantaneously, but should be gradually loaded to improve the charging efficiency, prevent damage to the turbine, turbine shaft and increase fuel consumption. The oil filter and oil should be cleaned and replaced according to the regulations, and the sealing condition of the intake and exhaust systems of the turbocharger should be checked frequently to prevent the damage of the sealing ring and the oil ring, which will cause the supercharger to leak oil and cause system failure. The exhaust gas turbocharger is lubricated and cooled by the engine oil. When the turbocharger is updated or repaired, a portion (about 50 ml) of the same level of oil as the generator requires should be taken to pre-lubricate the supercharger. The method is: slowly pour in the oil from the upper end of the turbocharger, and turn the rotor of the turbocharger, the oil can enter each lubricating part.
After the generator is cold and started, it should run at idle speed for 5 minutes. Because the oil used in the turbocharger is absorbed, pressurized and filtered by the oil pump, and then passed through the oil pipe, the other part is sent to the generator parts, and the other part is sent to the turbocharger, so after the generator starts, the oil is sent to the Before the turbocharger, if running at high speed, the turbocharger will be out of oil. Poor lubrication will cause early wear and damage. When the generator is working, a part of the oil is supplied to the turbocharger rotor bearing to lubricate and cool the turbocharger. After the high-speed generator stops, the oil pump stops delivering oil, the oil pressure drops rapidly, and the high temperature of the turbo part of the turbocharger is transferred to the lubricating oil in the intermediate bearing shell, and the heat cannot be quickly taken away. Therefore, when the generator is running at high speed Immediate shutdown can cause the turbocharger to overheat and damage bearings, shaft seals and shafts. Therefore, after the generator runs under heavy load and for a long time, it should run at idle speed for 3 to 5 minutes before shutting down.
