In recent years, with the vigorous development of various industries, there are more and more industries using Weichai diesel engines in the production and construction process. The price of diesel generators has also received widespread attention in the market. Weichai diesel engines are used frequently, and care should be taken at the same time. So, what points should you pay attention to when maintaining the diesel engine? Diesel generator manufacturer - Commler power analysis:
Below we introduce the five points of the maintenance of Weichai diesel engine:
1. The difference between voltage regulation and frequency adjustment: in a system, the frequency value is geographically independent, and the balance of active power is also the power balance of the whole system; and the voltage level is inconsistent in different power consumption areas, and the reactive power balance is mainly It is a balance in different areas, and the power plant's ability to regulate voltage can only be within a small area around it.
2. When multiple generators are operated in parallel, the effect on the system frequency and voltage is not significant when adjusting one unit by the above method. The main reason is to adjust the load distribution between the units, especially in small units in large systems. The voltage and frequency will not be substantially affected, and the unit can be adjusted as needed, so the adjustment of the diesel engine connected to the grid is much simpler.
3. When the generator maintains the active output unchanged, changing the excitation can change the reactive output and power factor of the generator; when the excitation current remains unchanged, the active output is increased, and the reactive output of the generator is reduced. If it is lowered, the excitation must be increased accordingly. When operating at low power factor, the load on the excitation system must be increased. In order not to exceed the excitation current at full load rated condition, the output should be limited. In order to ensure stable operation of the generator and maintain a certain degree of stability between the parallel motors, the generator should be operated. Excitation is controlled to avoid phase-in operation, the excitation current cannot be reduced too small, and measures must be taken to prevent loss of magnetism.
4. The excitation system not only plays a very important role in the operation of the generator, but also is the weakest part of the generator and the highest failure rate. Therefore, in order to ensure the safety of power generation, sufficient attention must be paid to the excitation system. After the shutdown and before starting the machine, it is necessary to carry out the necessary inspections, especially the brush device of the coaxial exciter, to check the technical condition of the brush, the brush holder and the surface of the commutator, and if necessary, to perform the purging; Generators should always check the brush for fire and beating; often ensure that the inspection, repair and maintenance of the diesel engine is the best way to guarantee the life and quality of the diesel engine.
5. When the diesel engine is idle for a long time, or the purchase of the diesel engine is simply a backup purpose. Then, if you don The most active preventive measure is to prevent moisture from the Weichai diesel engine. The temperature of the Weichai diesel engine is 5-10 ° C higher than the environment. This can effectively prevent the diesel engine from being damp.