FAQ

Gradually after the spring towards summer, the ambient temperature rises to the diesel generator set heat dissipation and added some difficulties. So the temperature rises we should give the diesel generator set to improve which cooling conditions? Generator manufacturers to find ways to find in.

1. If the diesel generator set power is large, the unit's load is also large, usually frequent use, then it is recommended that the user installs a cooling pool to maximize the possibility of heat dissipation;

2. Ensure that the diesel generator set room room air, install ventilation fans;

3. To the unit to increase the effect of air cooling, that is, increase the fan blowing against the diesel generator set.

4. Check the diesel generator set due to its own fault hidden trouble caused by excessive heat, such as repair and then run again under load;

5. Try to control the diesel generator sets do not overload operation, overload operation will also increase the unit heat;

6. Check whether the diesel generator set itself cooling system is normal, such as cooling waterway is smooth, whether the heat sink is smooth heat dissipation.

Under normal circumstances, the diesel generator manufacturers themselves designed cooling system is fully capable of meeting their own heat dissipation used. Try to find out the reason for the excessive heat, so as to better protect the diesel generator set.

When buying a generator set, many customers do not know how much power they need to buy the unit is suitable for them. Many users consider what brand of generator set to buy from the performance, price, fuel consumption energy and other aspects of the unit. In fact, these are not enough, first of all, users need to know how much power you want to buy the unit. Here we introduce, how to calculate the power size. Most of the international is the use of standby power, while the domestic is the use of the main power. So the market will often appear irresponsible manufacturers will swap the two power to introduce and sell units to deceive consumers, in the purchase of diesel generator sets must be careful.

The main power that continuous power to nominal, generator sets can be used continuously within 24 hours of the maximum power we call continuous power, and in a certain period of time, the standard is every 12 hours within one hour can be overloaded on the basis of continuous power of 10, at this time the power of the unit is what we usually call the maximum power, that is, standby power, that is to say, if you buy the main That is to say, if you buy the main 400kw unit, then you have 1 hour within 12 hours to run to 440kw, if you buy the standby 400kw unit, if you don't overload the unit usually open in 400kw, in fact, the unit has always been open in the overloaded state (because the unit's actual rated power is only 360kw), which is very unfavorable to the unit, will shorten the unit's life and cause the Failure rate increases. Therefore, the best power of diesel generator sets is the choice of the user's total load on the basis of 10% power reserves, so that both economic and practical.

Diesel generator sets are non-continuous operation of power generation equipment, if continuous operation for more than 12 hours, its output power will be lower than the rated power of about 90%. If the user needs to be used for a long time without interruption, you need to configure commonly used generator sets, that is, generator sets should take into account the power of the unit for a long time to work down this point.

Many users think that the generator diesel generator set load is good. In fact this is a very serious mistake, because more than 10 minutes long low idle or light will damage the engine. This is because the incineration chamber temperature is too low, complete incineration, fuel injector nozzles and sticking composition, resulting in carbon buildup in the valve piston ring. Assuming that the advocate coolant temperature below 60 ° C, unburned fuel will wash the cylinder wall, and make the crankcase oil dilution, affecting the quality of the smooth oil, and shorten the life of the engine, so try to shorten the idle time to avoid this situation arises. Here are five low loading operations of diesel generator sets.

1. Part of the cylinder oil burning, part of the oil can not be completely burned, valves, inlets, pistons, piston rings, carbon deposits and other places constitute, part of the exhaust. In this way, the cylinder liner exhaust pipe oil will gradually accumulate, can also constitute carbon deposits;.

2. The reservoir inside the turbocharger turbine chamber leaks, to some extent, from the combined surfaces of the supercharger.

3. Piston, cylinder liner, bad sealing oil, burned to the incineration chamber, exhaust blue smoke.

4. Generator to supercharged diesel engine, because of low load and no load, low intake pressure. Succinctly lead to supercharger oil seal (non-touch) seal oil into the pump chamber, cylinder;

5. Small loading operation for a long time, will lead to more severe wear and tear of moving parts, and incineration propeller overhaul cycle before the deterioration of the environment and other results. Foreign diesel propeller manufacturer, thus, regardless of the naturally aspirated boost type low load / pressure should be cut no-load operating time, and the minimum load of not less than 25% of the additional power unit - 30%.

It is worth mentioning that the diesel generator set long full-load working time, not only can advance its own function, find the safety hazards, but also to avoid large traffic accidents. Here are some detailed precautions for the operation of the unit.

1. Prepare for the initial. Before each claim it is necessary to check the fuel tank diesel claim machine cooling water or antifreeze satisfaction, generators such as short. Oil extraction oil measurement to view the oil short, such as short increase to the “static” rule full scale line, and then carefully check the danger, the relevant parts of the generator, assuming that defects are found in a timely manner to clean up.

2. Operation inquiry. Work unit, expect employees on duty, often look at a series of failures may be presented, especially pay attention to oil pressure, water temperature, oil temperature, voltage, frequency and other important elements. In addition, pay attention to have satisfactory diesel fuel, fuel oil, suspension, such as parking, objective loading may lead to damage to the generator excitation control system and related components.

3. Load proposition diesel engine is stopped. Before the initial attention to the generator diesel engine output air switch is necessary to be in a closed position. Generally generator diesel engine idling work 3-5 minutes after the initial winter low temperature (about 700RPM), the generator extends the idle a few minutes of time. Diesel engine advocate list **** query oil pressure is normal and derangement, such as any oil leakage, leakage, (in normal conditions hydraulic pressure is necessary to be greater than 0. 2MPa) assuming that the discovery of derangement immediately aborted. Assuming that there is no anomaly will increase the speed of the diesel engine additional speed 1500r/min, based on the generator frequency 50hz voltage 400v, the output can be closed by the air switch. Generator is not promised to work placed for a long time. (Because no-load work for a long time can make the diesel engine nozzle eruption can not completely burn diesel carbon buildup, valves, piston ring air.) Assuming that the active generator set, do not need to idle work, because the active unit is equipped with a water heater, so that the diesel engine cylinder has been maintained at about 45 ℃, diesel proponent can be launched normally after 8 to 15 seconds.

4. The generator is not burdened. Before each shutdown, it is necessary to block the load step by step, and then close the generator output air switch, the final is a slow diesel engine idling work for 3-5 minutes, and then abort.

In order to extend the life of the diesel generator set, better play its function, we should pay attention to the correct operation and protection, reduce the low load / no-load working time and the minimum load unit can not be less than 25% -30% of the extra power, in the low load working condition caused by diesel generator defects.

Diesel engine calibration power: according to the characteristics of the diesel engine, purpose and use of the characteristics of the effective power to determine the maximum use of the limit, called the diesel engine calibration power. At present, China's pilot national standards will be divided into the following four types of calibration power, in the calibration of the power at the same time, must be given to its corresponding speed.

A 15-minute power diesel engine is allowed to run for 15 minutes of the maximum effective power. Applicable to the need for a short period of good overload and acceleration performance of automobiles, motorcycles and so on.

Second, 1 hour power diesel engine allows continuous operation for 1 hour of the maximum effective power. Applicable to the need for a certain power reserve to overcome the sudden increase in the load of tractors, locomotives, ships and so on. Third, 12-hour power diesel engine allows continuous operation for 12 hours of the maximum effective power. Applicable only to the need for continuous operation in 12 hours and the full power of the diesel engine tractor, construction machinery, irrigation and drainage machinery.

Fourth, continuous power diesel engine allows long-time operation of the maximum effective power. Apply to the need for long-term continuous operation of irrigation and drainage machinery, power plants, ships and so on. According to the characteristics of use, the manufacturer in the diesel engine nameplate is generally marked in the above four kinds of power in 1 to 2 kinds of power.

These calibrated power is obtained in different states of adjustment of the diesel engine, the actual use of each diesel engine can only be adjusted according to the main purpose, that is, there is only a calibrated power. The calibrated power of a tractor diesel engine is usually adjusted for 12 hours of continuous operation, i.e., it is calibrated for 12 hours of power.