How to avoid some of the risks during the installation of diesel generators

Because there is no special equipment to load the test machine, it can not detect the completion of the project after the completion of the rated power output and load capacity can meet the design requirements, a direct impact on the project acceptance; some units installed noise reduction equipment, although the ambient noise reduced , But the unit output power there is a certain impact ... ...

First, the diesel generator set after the completion of the acceptance

Because there is no special equipment to load the test machine, it can not detect the completion of the project after the completion of the rated power output and load capacity can meet the design requirements, a direct impact on the project acceptance; some units installed noise reduction equipment, although the ambient noise reduced , But the output power of the unit there is a certain impact, can not detect how much loss of the unit output power, noise reduction project quality according to the original design to meet the contract requirements and to ensure that the unit's reasonable loss of power is how much.

How to extend the life of the generator, so that the generator to maximize the energy, diesel generator installation is very important, the following is the installation Notes:

1, the installation site to be well ventilated, the generator side should have enough air inlet, firewood side should have a good outlet. The air outlet area should be greater than 1.5 times the tank area; air inlet is not smooth or does not meet the requirements of the air into the cylinder less, this will cause the fuel inside the cylinder is not sufficient to produce carbon deposition, the impact of diesel generating capacity ; The same exhaust pipe does not meet the requirements of the engine room to reduce the oxygen content of the air, will cause the cylinder fuel is not sufficient to produce carbon deposition, the impact of diesel generating capacity.

2, the installation of the surrounding should be kept clean, to avoid the nearby placed to produce acidic, alkaline and other corrosive gases and steam items. Conditions should be equipped with fire extinguishing device.

3, used indoors, must be exposed to the exhaust pipe outside the pipe, pipe diameter must be ≥ muffler pipe diameter, then the pipe elbow should not be more than 3, to ensure smooth smoke, and should pipe Down 5-10 degrees, to avoid rain injection; if the exhaust pipe installed vertically, you must install the rain cover. In order to improve the output power of the diesel generator set, in the case of a certain capacity and quantity of the cylinder, only the additional air into the cylinder so that the fuel tank full combustion, in order to improve the unit's average effective pressure, the current diesel generating units are using turbo Pressure, which on the diesel generator exhaust requirements are more stringent, once the exhaust is not smooth or the exhaust gas speed can not meet the requirements of the air into the cylinder to reduce, it will cause the diesel generator load capacity decline.

4, the basis of the use of concrete, the installation should be used to measure the level of horizontal level, so that the unit fixed on the basis of the level. Between the unit and the foundation should be dedicated shock pad or foot bolts.

5, the unit shell must have a reliable protection of the ground, the need for a neutral grounding directly connected to the generator, you must be neutral by the professional grounding, and configure the lightning protection device, is strictly prohibited using the mains of the grounding device for the neutral point Direct grounding.

6, the generator and the electricity of the two-way switch must be very reliable, to prevent the power transmission. The reliability of the wiring of the two-way switch must be checked by the local power supply department.

7, start the battery wiring must be strong.

In summary, after the completion of the installation of diesel generating units, must be carried out acceptance, mainly carrying capacity test and electrical characteristics of the test, whether to meet the original requirements of the power level or whether to meet the original design capacity requirements, so that can be the heart There are several, to avoid the occurrence of security incidents.

Second, diesel generators in the daily maintenance of the limitations

1, the current maintenance plan of diesel generating units plan implementation is limited to the following means of maintenance:

2, the unit of the four leakage phenomenon, the surface, start the battery, oil and fuel inspection;

3, clean to improve the environment of the engine room, regular replacement of three filters;

4, the monthly no-load, every six months to load test and other aspects of maintenance;

5, the use of power monitoring real-time observation of electrical quality parameters.

6, the maintenance of limitations:

7, the existing maintenance of the load test is only on the back of the existing power equipment with the load test;

8, diesel generator set full load and the specified time under full load on the electrical characteristics of the parameters of the test;

9, no-load test machine and a small power generated by a large number of carbon deposition.

Note: Diesel generator sets will be based on the environment of the engine room, the useful life, routine maintenance is not in place, the replacement of equipment and equipment will appear different degrees of power decline, which there is a very important security risks, and diesel generator for a long time no load or Idle operation, resulting in carbon deposition, which will lead to reduced engine output power, affecting the output of the entire unit power, and even cause the normal operation of the illusion, once the real load load diesel generator can not run a major failure.

Coke formation: because the combustion chamber temperature is too low, so that fuel can not be completely burned, which will cause coking, which blocked the nozzle nozzle and piston ring, and the exhaust pipe "black oil" overflow, also May hold the valve stuck. Some unburned diesel will flush the oil on the cylinder wall and dilute the oil in the crankcase so that all the runners in the engine are badly lubricated.

Diesel generator sets run under small loads, with the continuation of the running time, the following faults occur:

1. Piston - cylinder liner seal is not good, oil up and down, into the combustion chamber combustion, exhaust smoke blue smoke;

2. For the supercharged diesel engine, due to low load, no load, supercharging pressure is low. Easy to lead to supercharger oil seal (non-contact) of the sealing effect decreased, the oil flee into the pressurization chamber, with the intake into the cylinder;

3. A part of the oil that is sprang to the cylinder is involved in the combustion. A part of the oil can not be completely burned. Coke is formed in the valve, inlet, piston, piston, etc., and some are discharged with the exhaust. In this way, the cylinder liner exhaust gas will gradually accumulate oil, will also form coke;

4. Supercharger pressurized indoor oil accumulation to a certain extent, it will leak from the junction of the supercharger;

5. Long-term low-load operation, will be more serious damage caused by increased wear parts, engine combustion environment deterioration caused by the consequences of overhaul ahead of time.

Therefore, foreign diesel engine manufacturers, regardless of the use of natural suction or booster models are stressed that should minimize the low load / no load running time, and provides the minimum load can not be less than the unit rated power of 25% -30%.

Diesel generators run for a long time, not only can improve their own performance, to identify security risks, but also to avoid major communications accidents.

Third, diesel power plant replacement basis

Communication industry after nearly two decades of rapid development, room equipment continues to increase, resulting in alternating current into several times the current increase, which makes the original engine room capacity of diesel generators can not keep up with the requirements, in order to ensure communication security, to avoid safety The accident occurred, must be replaced before the small-capacity diesel generator sets, over the age of use of diesel generators and diesel loaders with reduced capacity.

Replacement units have suggested:

Can not simply consider the use of life from the unit;

According to the load factor of the unit to consider;

Must be replaced with a load rate of more than 70% of the super-age units.