Human life is more and more dependent on electric power support, with the progress of science and technology, more and more ways of power supply.
According to its energy sources, it can be roughly divided into nuclear power generation, hydroelectric potential power generation, thermal power generation, wind power generation and solar power generation.
With the support of large power stations, the city can function properly, the demand for electricity supply in cities is also growing, especially in the summer, when peak demand often occurs the phenomenon of insufficient power supply.
However, once the power is cut off, the hospitals, government offices, and other units will have great negative consequences.
In addition, power outages can cause very large economic losses to large enterprises. So more and more units now have their own backup power supply.
As the most common standby power equipment, the maintenance, and operation of diesel generator sets have been paid more and more attention.
Here are 4 tips on how to maintain and diagnose diesel generators set.
There are six systems in the diesel generator set, namely, oil lubrication system, fuel system, control, protection system, cooling, heat dissipation system, exhaust system, and starting system. The problems mainly focus on the start-up system, the cooling system and the fuel system.
1. Start The System Problem
As the diesel generator is generally a standby power source, it is usually in standby mode and its operation is relatively short. But because it is an emergency power supply, its emergency start-up ability is particularly critical, which requires that the start-up system cannot have problems.
And the key to getting started lies in the accumulator, an accumulator is an engine that starts the only power source, to accumulator should carry on careful maintenance.
Let’s get the battery up to par constant voltage is required to monitor the battery voltage at ordinary times. When charging the battery, stop charging after reaching the rated voltage.
Maintenance battery to watch battery internal composition proportion, if an internal acid loss has not been timely supplement water, or the amount of electrolyte can not meet the prescribed level, makes the battery performance greatly reduced when added electrolyte excess, is more than the electrolytic corrosion terminal, treatment method is to burnish drops corrosion, to reinforce the screw, in order to reduce resistance.
Even if the battery is often maintained correctly, the battery still has its fixed service life, domestic battery life is not more than two years,it should be replaced every two years so as not to delay the emergency start of the engine.
2. Cooling System
High operating temperature should be avoided when diesel generator is running. Although diesel generator has its own cooling system, more maintenance should be done on the cooling system itself. Poor operation of the cooling system mainly results from the following reasons.
- The cooling cover is covered by dust, which is a poor conductor of temperature. The temperature cannot be dispersed when the cooling cover is covered, which easily leads to electricity generation，When the machine stops running, just keep the cooling cover clean.
- The cooling fan doesn’t work properly. One of the culprits is dust. Dust and debris are easily sucked to the water tank by the cooling fan, blocking the ventilation. It causes high temperatures. Once it is found that the fan is not working smoothly, it should be cleaned of impurities in time. Another reason the fan doesn’t work as well is that the belt is old makes the belt hard to drive the fan to rotate. The fan belt should be replaced and a whole set of belts should be replaced, not just oneAging belt.
- Aging of the fan power cord. The aging of the fan power supply line will cause the line to fuse, the fan cannot turn, if the fan does not turn, should first check whether the line is unobstructed.
- Insufficient coolant will affect the cooling system.During daily maintenance, check whether the coolant is sufficient. If not, check the missing position first, and then replenish the coolant to the specified level after repair.
- The performance of the cooling fluid is not high, or due to poor quality, the scale is generated, or corrosion of the cooling pipe produces impurities, blocking the cooling system, affecting the cooling system circulation. When purchasing coolant, it is recommended to buy high-quality products, because diesel generators do not work very often and do not consume much.
- Too much reliance on diesel motor cooling systems.Except for the diesel generator’s own cooling system when operating in a high-temperature environment. In addition to work, auxiliary cooling should also be carried out, such as installing a fan in the diesel generator room to blow the generator body to cool down.In case of insufficient supply, the missing location should be checked first, and the coolant should be replenished to the specified level after repair
3. Fuel System
There are two main reasons for the failure of the fuel system.
- The fuel injection nozzle is blocked. Low-grade fuel oil contains a lot of impurities, which will lead to fuel injection nozzle blockage. In order to avoid failure, diesel generators should choose high-grade fuel oil. Otherwise, when the fuel injection nozzle blocked, unable to fully burn, will cause diesel generator smoke, or even damage the diesel generator cylinder block. Therefore, choosing high-grade fuel oil can effectively extend the service life of diesel generators. Another factor blocking the nozzle is too much ambient dust. To avoid dust blocking the nozzle, the air filter element should be cleaned or replaced regularly.
- Air enters the fuel system. When the air enters the fuel pipe, it will reduce the pressure inside the pipe, which will cause the nozzle to fail to work normally and the engine cannot start. There are two main reasons for the introduction of air. One is running out of fuel, which should be completely avoided. Staff should always pay attention to the fuel margin to ensure that the fuel tank is always full of diesel fuel. Another reason is the aging of the pipeline rupture, so that air into the peacetime maintenance remember to check and replace it.
4.Other Questions
When carrying out daily maintenance on diesel generator set, the indispensable step is to add oil, the process should be strictly in accordance with the requirements, must not add too much, otherwise the generator will produce blue smoke, if excessive, reduce the oil to the specified amount can be.
Although power outages often occur in the summer, backup power may be used in the winter.
When the temperature is too low, the diesel generator cannot work normally. In order to ensure the emergency power supply of the diesel generator set, the temperature of the diesel generator room should not be lower than 10℃.
Generally want to install thermal insulation facilities in the machine room, winter door side wall laid thermal insulation material, can hang thermal insulation door curtain.
Diesel generator operation will produce certain vibration, vibration will loosen the connection electrode, so the reinforcement of the connection wire or electrode is an indispensable part of daily maintenance.
In particular, the fastening nut of the output line terminal of diesel generator, the connection between the battery terminal and the cable joint, the connection between the control circuit board and the cable connection of the starting motor, etc., should be checked and strengthened regularly.
Conclusion:
In this sense, the daily maintenance and management of backup power supply is as necessary as the maintenance and management of fire protection facilities.
With the increase of power consumption, fire hazards and power supply interruption are often associated, if the standby power is not in place when the fire comes, it will cause a very large loss.
Even in the absence of a fire, the disruption of production, or the interruption of electricity supply for cooling in the summer, would have a severe impact on businesses and residents, far greater than the loss of day-to-day maintenance and operation management of generators.
