Talking about the common fault maintenance and maintenance of diesel generator sets

One,Diesel generators组Can not start

In the daily worker, the generator set is common to start, thereby causing a dedicated device that cannot be used normally. The most common cause of the cause of the generator set cannot be started:

1. Battery failure

If you press the generator set to start buttons, the diesel engine is slowly rotated, and when it is turned to rotate or cannot rotate, it should immediately check the battery. Use a multimeter to check whether the battery voltage reaches the rated voltage DC24V (Jiangsu Star Diesel Generator Set Battery Voltage is 24V). Science and technology papers, diesel generator sets. . The monitoring of the electronic control module ECM on the entire unit status is maintained by the battery power supply due to the power generator usually in an automatic state in an automatic state when it is in an automatic state, and the contact between the EMCP control panel is maintained by the battery. When the external battery charger fails, or the self-discharge of the battery can cause the battery to reduce the voltage drop. The battery must be charged. Charging time via the battery discharge condition and the rated current of the charger. The situation of the situation or the battery can not be charged and cannot be stored, and the battery must be replaced. For the above, it is recommended to provide a fully automatic special charger for the generator set to ensure a constant voltage at the time of the battery. In addition, the battery is measured primarily at least once a week. For wet batteries, the battery water must also be checked from time to regularly, whether it is between ZUI low and ZUI high-oriented lines, otherwise it will be adjusted to prevent the battery to prevent insufficient charging or charging. If the maintenance is improperly maintained, the loss of the internal water, the acid component is not added in time, and the battery capacity is reduced to reduce the service life. The chemical reaction principle of the lead-acid battery is as follows:

PBO2 + 2H2SO4 + PBû2PBSO4 + 2H2O

Sub-reactive H2 O charge 1 / 2O2 + 2H ++ 2Eˉ

As can be seen from the upper reaction, there is a water decomposition reaction during the charging process, precipitated oxygen and hydrogen escape. This is an important reason why it needs to be maintained often.

2, check whether the battery terminal and the connection cable are in good contact.

When the battery electrolyte is in the usual maintenance, it is easy to replenish the surface corrosion pillar of the radiation of the battery, which may cause the power generator to start. In this case, the barrier layer can be used to polish the corrosion layer of the cable connector, and then re-fasten the screw, so that the terminal is fully tightly tightly tightened to the electrode wiring. In order to avoid the wiring column again, the grease can be applied to the wiring column for anti-corrosion treatment.

3. Check whether the positive and negative cable wiring of the start motor is firm. A vibration generating a vibration when the generator is running, which will cause the generator to start normally. There is fewer faults in the start motor itself, but it cannot be excluded. It is judged that the operation of the start motor can be checked by the housing of the start motor in the moment of the motion, such as starting the motor is warm and cold, and the motor is not action. Science and technology papers, diesel generator sets. . Or start the motor seriously hot, there is a stimuli, then the motor coil has been burned. Repairing motors need to replace directly for a long time.

4. In addition to the above circuit faults, it is possible that the oil supply system has failed to cause the generator set to not start. For example, in the fuel system, there is air, which is more commonly encountered, usually in handling improper handling (such as replacing the fuel filter) caused by air access. After the air enters the pipe with the fuel, the air in the pipe is reduced, the pressure is lowered, and the injector opens the nozzle to reach 10,297 kPa, and the engine cannot start. Exhaust treatment is required (Jiangsu Xinglu diesel generator is required to exhaust the pump), and it can be fuel to transport the pump to the oil pressure of 345 kPa. In addition, the fuel pipe is blocked. For example, the injection nozzle will not cause the diesel engine to be started. At this time, the oil passage must be cleaned to make the oil passage, and the generator set can start.

5. Diesel air system failure causes the generator set to be unable to start, and it is more common. This is generally because the staff is negligible to manage, and the generator is not often maintained. The air filter is not cleaned up, and there is too much debris such as dust, causing air that cannot supply a diesel engine normally, causing the generator set to start. At this point, it is necessary to clean or replace the air filter, and the fault is excluded.

Second, the diesel generator set no output voltage

In daily work, the generator set does not have output voltages is also a common fault. There are several reasons for the failure of generators in this:

1. The rectifier fault will cause the generator set not only no voltage output, but the output frequency is not displayed. Science and technology papers, diesel generator sets. . The replacement of the rectifier assembly is quickly excluded. It is worth noting that models that match it must be selected.

2. When the generator set coil is burned, it will produce a clear tip taste. Check with multimeter, the winding terminal resistance is zero (winding has been sintered) or the resistance is infinite (the winding has blown), and the coil winding must be repaired or replaced directly.

3, if the output voltage meter is displayed normally, and the electrical equipment is not electrically arriving, it may be that the generator output switch fault, after replacing this switch, the fault is excluded.

Third, in addition to the above two faults, the transduction of the diesel outer shell of the generator set is also more common. It is mainly due to the diesel cylinder head, the gasket damages or screws between the bottom shell and the cylinder are not required to be protracted from the rules of ZUI: 8n.m), and must pay attention to tighten one by one according to the diagonal order. The cylinder head screw removal order is opposite to the installation, that is, the first outside.

Fourth, daily management of diesel generator sets

The above is a common fault analysis and processing method of the generator set, and then talk about the daily management of the generator set. As a saying, \"Everything is necessary, not prevised,\" all work, must have planned sex, take active preventive measures, so that it can be unimpeded when there is an unexpected situation, and it is not panic. Therefore, the daily maintenance of the generator set is necessary to effectively prevent measures for ZUI.

(1) First, we must formulate scientific management methods, the following is the management method developed by our property center. And strictly implement the same essential.

1. The usual generator room should be locked. Non-staff prohibits access in universal supervisors. This avoids idle people to enter the machine room because of curiosity to change the set state of the generator, such as transforming the automatic state to manually or inadvertently touching a valve change the valve condition. It is unnecessary. Science and technology papers, diesel generator sets. . Even the equipment is affected during the community interruption.

2. Department management personnel must be familiar with the basic performance and operation of the generator, usually the routine inspection work. The management personnel are familiar with the generator and do routine inspections, so in order to find problems in time, eliminate troubleshooting. When the generator fails, it can make a fault judgment in time, propose a solution, and shorten the fault resolution, and ensure that the electrical device will return to normal operation as soon as possible.

3. Managers must always understand whether the reserve of diesel oil is normal, as well as cooling water, oil levels and viscosity, and cleanliness. To ensure that the generator can put into operation in a timely manner at any time, avoid unnecessary time delays.

4. Generator switches should be placed in automatic starting state, and timely power generation is timely power generation, shorten power failure time.

5, the generator is a one-week no-load test. Time should not exceed 15 minutes. Since the generator is low in airborne operation, the piston and the cylinder walls are low, which is prone to leakage of the lubricant oil, which is not conducive to the use of the engine. Science and technology papers, diesel generator sets. .

6. Once the generator is put into operation, the management should immediately go to the machine room inspection unit to run normal, including each instrument indication, water temperature, oil volume, etc., there is no abnormal situation. Science and technology papers, diesel generator sets. . Discover an abnormal situation, timely check, determining whether the fault affects the normal operation of the unit, if a serious impact on the unit must be shut down, timely troubleshoot, avoiding electricity and sudden interrupt accidents. For small faults, you must do a good job, and then repair it after the market is recovered.

7. Do a good job in the maintenance of the generator and save the full running record and maintenance record. Do a good job in the maintenance work of the generator to make the generator in a good standby state; while running records and maintenance records facilitate the timely discovery of hidden dangers, and can also provide important reference materials to resolve faults.

8. To do the environmental management of the machine room, keep the computer room clean and keep the machine room well. It is strictly forbidden to stack in the machine room, which is strictly forbidden to smoke in the machine room. The wind is large in the machine room, the unit is high at runtime, but the debris not only affect the operating state of the generator; some flammable items are easy to have a fire in high temperatures, and the consequences are unimaginable. Therefore, fire protection facilities in the machine room must also often Check and stay intact.

In short, today's electricity is more stable today, although the investment in the alternate generator set is relatively small, it is especially important for the reserve power of our production and life. Only the common faults of the generator can help us eliminate the fault more quickly in daily maintenance and management; strengthen daily maintenance to prevent malfunctions, ensure the normal operation of equipment, so as much as possible to avoid the normal production of people life.