Operation instruction of Cummins diesel generator set -- Guangdong diesel generator set
Category: Technical Information
Date: 2020-10-19
Click: 435
Author: 珠海新動力柴油發電機
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The slower the camshaft speed is, the longer the injection pressure increases, and the worse the fuel atomization quality, and the camshaft speed changes with the diesel engine speed.
Cummins diesel generator set is the product of 1980s. As the leader of diesel engine in the world, Cummins diesel generator set is in the leading position in the world in terms of quality, function and technology. Today, Zhuhai new power will introduce the operating instructions of Cummins diesel generator set for you.
1. Correctly implement Cummins' early running in regulations
The service life, working reliability and economy of Cummins diesel generator set depend on the running in of diesel vehicle at the initial stage. During running in period, Cummins diesel generator set is required not to overload and run at high speed. The working time of Cummins diesel generator set at maximum power shall not exceed 5min. Oil level of crankcase shall be checked every 10h during running in period. The running in of new engine is an important starting point to extend the service life of Cummins diesel generator set. After the running in period, the new engine should be maintained. Zhuhai new power diesel generator set sales
2. Check Cummins Pt oil supply system frequently
Cummins diesel generator set adopts PT fuel supply system. Cummins basic principle is that according to the influence of the output pressure of the fuel pump and the fuel injection time of the injector on the fuel quantity, the circulating fuel supply is controlled to meet the needs of different working conditions of the diesel engine. Since the PT fuel supply system is not equipped with a hand pump, it is necessary to check whether the diesel oil in the diesel tank is sufficient. After the diesel oil is sucked out, it takes a long time to restart Cummins diesel generator set, which is unfavorable to the service life of the starter. Secondly, in order to ensure the smooth fuel supply system of Cummins Pt and reduce the early wear of Cummins PT fuel pump and fuel injector, Cummins diesel generator set requires that the diesel oil used must be clean, before adding, it must be fully precipitated and filtered to remove impurities. Pay attention to keep clean when refueling, do not let dust and moisture mixed in.
3. Cummins should not idle for a long time
Cummins diesel generator idling for a long time will reduce the quality of fuel spray atomization and accelerate the early wear of Cummins diesel generator cylinder wall. Because the quality of atomization is directly related to injection pressure, injector diameter and camshaft speed. Since the diameter of the injector remains unchanged, the quality of fuel atomization depends on the injection pressure and camshaft speed. The slower the camshaft speed is, the longer the injection pressure increases, and the worse the fuel atomization quality, and the camshaft speed changes with the diesel engine speed. Long idle time can lead to low combustion temperature and incomplete combustion of diesel engine, which may cause carbon deposit to block injector nozzle, piston ring or valve sticking. In addition, if the coolant temperature of Cummins diesel generator set is too low, some unburned diesel will wash the oil film on the cylinder wall and dilute the engine oil, so that all moving parts of Cummins diesel generator set can not be well lubricated, resulting in premature wear of parts.
4. Start and stop Cummins diesel generator set correctly
During the start-up of Cummins diesel generator set, in order to protect the turbocharger, do not increase the throttle before the idle oil pressure is shown on the oil pressure gauge, and the speed of Cummins diesel generator set shall not be higher than 1000r / min. After the Cummins diesel generator set is started, especially in winter, it should run at idle speed for 3-5min, and the standby oil pressure can reach 0.25MPa before gradual acceleration; when the water temperature is higher than 75 ℃, the oil temperature is higher than 80 ℃, and the oil pressure is higher than 0.25MPa, the full load operation can be started, otherwise the floating bearing and sealing ring of supercharger will be damaged prematurely due to lack of oil. Zhongshan diesel generator company
5. Cummins diesel generator set can not work at low temperature or high temperature for a long time
Cummins diesel generator set often works at low temperature, which will aggravate the low-temperature corrosion of Cummins diesel generator set and produce too much low-temperature sludge; long-term operation under high-temperature will aggravate the oxidation and deterioration of engine oil, increase the high-temperature bonding of piston ring, and produce excessive high-temperature precipitation (paint film).
The purpose of maintaining normal oil temperature of Cummins diesel generator set in operation is as follows: firstly, the temperature of friction parts, especially crankshaft bearing, will not be too high, so as to avoid the strength reduction and wear aggravation of Cummins diesel generator set parts; secondly, make the oil pump have a large amount of pump oil, so as to ensure the reliable cooling and lubrication of the friction surface. Because there is a great relationship between the oil pump oil quantity and the oil temperature, too high or too low temperature can reduce the pump oil volume. Only when the oil temperature is normal (about 85 ℃), the pump oil volume is the largest. At this time, the oil viscosity is appropriate, which not only has good fluidity, but also can reduce the backflow volume in the pump. Thirdly, the oil keeps normal temperature, which can reduce the oxidation rate of oil under high temperature, so as to prolong the oil consumption Long service life of oil.
6. Method of keeping Cummins diesel generator set normal working temperature
The cooling water temperature of Cummins diesel generator set should be between 75 ℃ and 90 ℃, and the maximum temperature should not exceed 95 ℃. The method to maintain the normal working temperature of Cummins diesel generator set is: when the Cummins diesel generator set is started, the heat preservation device in front of the radiator shall be closed to make the heat absorbed by the diesel engine be greater than the heat dissipation capacity, so as to make the Cummins diesel generator set rise rapidly; during the operation of the unit, if the diesel engine is overheated, the heat preservation device shall be opened to make the heat dissipation greater than the heat absorption, so as to make the cooling water If the diesel engine overheats but is not serious, it can increase the speed of the diesel engine, so that the heat dissipation is greater than the heat absorption, so that the diesel engine can be cooled down; or it can be operated in a lower gear to reduce the load of the diesel engine and increase the speed of the diesel engine at the same time
