Diesel Generator Tech

Do you know how to inspect and repair the damaged slip ring of a diesel generator set? After shutdown, check that the insulation of the rotor winding to the main shaft is zero, and the insulation of the excitation circuit is about 7MW. After the maintenance personnel removed all the rotor slip rings and insulation sleeves, they checked that the insulation of the rotor winding to the main shaft was greater than 100 MW, and the results of the DC resistance and communication impedance experiments were qualified. From this, it can be concluded that as long as the negative slip ring is grounded, the insulation of the excitation circuit and other parts of the rotor winding is excellent, and the excitation system is normal. Collaborate with the manufacturer to remove the positive and negative collector rings, fan rings, and insulation barrels of the diesel generator, and polish the rotor shaft. Finely process the positive and negative collector rings until they meet the surface lubrication an...

Strengthen the understanding of the oxide film on the surface of   generator   brushes, establish its composition and normal operating conditions: Several recent problems mainly due to the inability to form a smooth layer of the oxide film on the brush surface. The composition of the oxide film requires some conditions. When the conditions are not met, the oxide film cannot be formed or is poorly formed, mainly due to the following reasons: (1) High temperature: The oxide film of electric brushes is generally easy to form at around 70 ℃. When the generator collector ring and brush overheat, the temperature is usually above 150 ℃. Even if a new brush is replaced at this moment, the oxide film is not easy to form and cannot play a smooth role. Brush wear will intensify, causing the temperature to continue to rise, becoming a vicious cycle. At this moment, external forced cooling methods can be adopted, such as applying Vaseline, high-power fan ventilation, etc., to lower the tem...

When Volvo generators cannot start normally, the reasons should be found from aspects such as starting work, diesel engine fuel supply system, and compression. Today, let's share the reasons why a   Volvo generator   fails to start properly. To ensure normal operation of a Volvo generator, the first step is to accurately and timely inject well atomized diesel into the combustion chamber, and to ensure that the compressed air in the combustion chamber has a sufficiently high rotational speed and a certain temperature in the cylinder when starting the diesel engine. The ambient temperature is too low. Before starting the Volvo generator, the diesel engine should be preheated properly, otherwise it is difficult to start. The starting speed is low. For manually started diesel engines, the speed should be gradually increased, and then the pressure reducing handle should be turned to a non pressure reducing position to ensure normal compression in the cylinder. If the pressure reduc...

Volvo diesel generator sets are a type of energy that is very frequently used in China, and some regions abroad have always been used as the main energy source for power generation. In most construction projects in South Africa, Volvo diesel generator sets are used as the main energy source for power generation. A high-quality   Volvo diesel generator set   can bring stable output electricity. Volvo diesel generator sets often encounter voltage instability during long-term use. This situation is relatively common, which is caused by poor contact of some components and other problems during use. Below, Dingbo Power Generation Equipment mainly explains how to solve the problem of high voltage in Volvo diesel generator sets during operation. Generally speaking, the reasons for high voltage mainly include four aspects. 1. The speed is too high. Faced with the problem of high speed, the operator only needs to reduce the opening of the turbine's guide vanes. 2. The iron core ga...

The silent diesel generator set is a commonly used mechanical equipment, just like a car. It is idle when not in use, and the car needs comprehensive maintenance and replacement of spare parts at a specific time; Similarly, when maintaining a   silent diesel generator set , it is also necessary to perform maintenance on the equipment itself. Which spare parts usually need to be replaced during the maintenance process? After the unit has been running for a long time, the cylinder liner and piston wear form a conical ellipse, which is usually replaced together. After the piston rings are worn, it is necessary to replace them in groups or as a complete set, rather than just replacing one ring or mixing them with new rings. It is necessary to replace the wet cylinder liner water blocking ring in pairs, otherwise it will affect its sealing performance. The crankshaft main bearing shells and connecting rod shells, as well as the upper and lower tiles, need to be replaced together. It is ...

Do you know how diesel generator sets are distributed with load power? In fact, when the active power distribution of parallel diesel generator sets is severely unbalanced, and when the total load power is large, one diesel generator set is at full load or overloaded, while the other diesel generator set is still in a light load state, the capacity of the diesel generator set cannot be fully utilized, and the efficiency of the entire power station can be achieved. On the other hand, when the total power of the load is small, the imbalance of active power often causes active power circulation between   diesel generator sets , causing them to switch to the motor state, which is also not allowed for diesel generator sets. Given the above situation, special attention needs to be paid to diesel generating sets with frequent loads and large amplitude changes. The uneven distribution of reactive power in diesel generator sets, although not seriously affected, is based on a clear imbalance...

Do you know about the research on the noise generation of diesel generator sets? The exploration equipment at coal seam exploration sites usually consists of diesel generator sets, drilling rigs, slurry pumps, etc. These devices emit strong noise during operation. After on-site measurement, the noise of the diesel generator set is 98dB (A). The equipment noise not only affects the physical health of the operators, but also causes pollution to the surrounding residential environment. Control and isolate the noise of the diesel generator set. There are two types of diesel generator sets used in geological exploration, one with an output power of 250kW and the other with a power of 160kW. Due to the frequent use of the 160kW   diesel generator set , the work of this project is carried out on the 160kW diesel generator set. In addition, the original muffler structure is very simple, and its noise reduction must be strengthened. Therefore, the main measures of the project are to adopt s...

Cylinder flushing pad is a common fault in generator sets, and there are various forms of cylinder flushing pad, with the common feature being abnormal noise. Due to the varying degrees of impact on the cylinder cushion, the abnormal sound generated is also different. This article explains the troubleshooting methods based on the varying degrees of cylinder cushion faults in three Hongqi 120 bulldozer   generator sets . When a bulldozer is cold started, there are two knocking sounds of "dang" and "dang", and a white smoke is emitted first. The generator set catches fire only after black smoke is emitted. When suddenly increasing the throttle, there is also a knocking sound, and after the throttle stabilizes, the abnormal sound basically disappears. If there is still a knocking sound when suddenly increasing the throttle repeatedly. During the cylinder cutout inspection, it was found that the abnormal noise occurred in cylinder VI. Suspect that the fuel injector need...

What are the three common startup methods for diesel generator sets in parallel automatic mode? In the automatic mode of diesel generator set parallel operation, there are three common starting methods: starting according to demand, starting all, and balancing the engine running time. Below, we will elaborate on them. Firstly, it is necessary to start the machine according to the demand. In the automatic mode of  diesel generator set  parallel operation, when the switch input port remotely starts and the load is effective, the module with the highest priority will start the machine first. When the load is greater than the maximum percentage set by the module for starting, the module with the second priority will start the machine, synchronize the parallel operation, and evenly distribute the load. When the load is less than the minimum percentage of shutdown set by the module, the sub priority module will shut down for heat dissipation after the shutdown delay is completed. Wh...

Transformer is an important part of diesel generator, and also the part most prone to failure. The transformer tap changer fault is the most common fault of the transformer. The customer service personnel of Dingbo Power, the   diesel generator manufacturer , will introduce the causes of the transformer tap changer fault in detail. 1. On load tap changer: For transformers with on load tap changer, the oil tank of the tap changer is generally not connected to the transformer oil tank. If there is a serious shortage of oil in the tap changer oil tank, a short circuit fault will occur during the tap changer switching, causing the tap changer to burn out. Therefore, during operation, the oil levels of the two oil tanks should be monitored separately to ensure that they are normal; The malfunction of the tap changer mechanism includes: due to jamming, the tap changer stopped in the process position, causing the tap changer to burn out; The oil tank of the tap changer is not tightly...

If Yuchai diesel generator is installed under the aircraft, it is recommended to use Yuchai diesel generator remote radiator for cooling due to space constraints. The radiator in the remote radiator cooling system of Yuchai diesel generator is separated from the engine and dissipated by the electric fan of Yuchai diesel generator. This system can be used as a fully enclosed unit for outdoor use or as an open form for indoor equipment. When the radiator is installed more than 3 meters above the Yuchai diesel generator, most   Yuchai diesel generator   need separate water tanks and electric water pumps. The size of the branch water tank depends on the capacity of the entire cooling system, that is, the total number of pipes required plus the amount of cooling water used. The cooling water of Yuchai diesel generator is driven by an electric circulating pump, and the circulating pump of Yuchai diesel generator passes through the radiator and...

  Sensors are very important for diesel generator set to monitor data by control panel. If incorrect use and selection, the diesel generator set may cause faults. Today Starlight Power will introduce the sensors of diesel generators. Hope the article is helpful to you.   What is main sensor in a diesel generator? 1.Oil pressure sensor. Its function is mainly to monitor oil pressure, then we can know the capacity of oil. If the lubricating oil is less, the wear of the generator set will increase, resulting in the reduction of the service life of the diesel generator set. 2.Coolant temperature sensor.  Its function is mainly to monitor  coolant temperature , so that we can know whether the temperature of the water tank exceeds the normal value. Normal value is generally 85℃. If the temperature of the water tank is too high, the cylinder block will be heated too high, which will damage the diesel generator set and cause power failure. 3.Speed sensor.  Its function ...