Diesel Generator Tech

As critical emergency power sources, diesel generators play a vital role during grid failures or natural disasters. However, extreme weather conditions—such as intense heat, humidity, sandstorms, and flooding—pose significant risks to generator performance, increasing the likelihood of malfunctions. Thus, implementing a robust preventive maintenance plan is essential to ensure uninterrupted operation of diesel generator sets under these challenging circumstances. Why preventive maintenance of diesel generator matters? A preventive maintenance strategy focuses on anticipating risks through regular inspections, servicing, and repairs. For diesel generators, this approach: Reduces downtime and financial losses from unexpected outages Enhances reliability and safety for mission-critical operations Extends equipment lifespan by addressing potential problems before failures occur Extreme weather threats & targeted solutions High-temperature challenges Risk: Overheating reduces ...

The generator fuel pump is the "heart" of the engine's fuel supply system. It is a device that continuously draws fuel from the fuel tank and provides the fuel system with fuel at a specified pressure and flow rate. Based on the functions of the generator fuel pump, it can be known that the performance of the fuel pump will directly affect the working performance of the engine. Therefore, it is necessary to carry out corresponding preparatory work before using the fuel pump. To ensure the normal use of the generator, debugging the fuel pump is the primary preparatory work. We must install and debug it on a dedicated test bench according to the fuel pump calibration data sheet. Currently, the flowmeter method is mostly used, and the specific steps are as follows: Preparation before debugging The fuel pump and injector have been debugged on the test bench. The generator is in good technical condition and has entered the hot - running state. The fuel pump is correctly co...

What is the fully automatic parallel cabinet project for diesel generators? The principle of fully automatic parallel operation is that after several generators are connected, they are equivalent to a high-power generator supplying power to the load. The number of generators can be determined according to the size of the load (the unit consumes the lowest fuel at 75% of the rated load), thus achieving the goal of saving diesel and reducing the cost of diesel generators. Realize uninterrupted power supply to ensure normal production of the factory. When the unit is converted for use, the backup unit can be integrated into the operating system, and then all the load can be transferred to the already running backup unit before stopping the original operating unit. There is no need to cut off power halfway. Multiple units operate in parallel. When the load suddenly increases, the current surge is evenly distributed among the multiple units, reducing the force on each unit and stabilizing t...

Today, we will briefly introduce the maintenance of Cummins diesel generator oil pump parts. If you have any further information, please feel free to consult our Dingbo website. Next, we will introduce relevant materials to you. After the disassembly of the  Cummins diesel generator  oil delivery pump, check the wear of the inlet and outlet valves and valve seats: if there are cracks or severe wear, they should be replaced; If there is slight wear, it can be ground and repaired; If the piston and housing of the oil delivery pump are loose or move unevenly due to wear, the pump should be replaced with a new one. If there are signs of wear, dents, pits, etc. on the plane of the one-way valve, grinding paste should be used to grind it on the flat plate. In severe cases, a new one should be replaced. The surface of the one-way valve seat on the housing is severely worn or uneven, which should be replaced. If the top rod and top rod sleeve are severely worn, resulting in large gaps...

After generator starts up, there is no voltage, the most possible reason is the generator has no magnetic field. Why is there no magnetic filed in generator? Fault phenomenon: After standby generator set idle for a long period of time, when restart, there is no AC voltage output. Measure the main output winding, and the voltage between phases is "0" or lower than "5vac". The reason: Generator has not been used for a long time, resulting in losing remanence contained in iron core. The excitation coil can't establish the proper magnetic field. At this time, the generator set runs normally but does not generate voltage. This kind of fault often occurs in new generator set, generator set stored in humid environment or generator set not used for a long time. How to deal with no magnetic field problem of generator? 1.Check the main output circuit of the generator to avoid the excitation cannot be established due to the short circuit at ...

1.Back pressure of compressed air in cylinder When Back pressure of compressed air in cylinder of generator set increasing, density of compressed air will increase, which can increase air resistance acting on fuel spray. Therefore, fuel atomization can be improved, spray cone angle is increased, and range is reduced. In the non supercharged diesel generator, the reverse pressure of the compressed air in the cylinder does not change much, so it has no significant effect on the characteristics of the oil spray. 2.Fuel pump cam contour and speed When the cam contour is steep or the camshaft speed is high, the speed of fuel supply in plunger of injection pump will increase. Because injector orifice reduces expenditure, fuel can not flow out directly. Which causes fuel pressure in fuel pipe increased and the speed at which fuel flows out of the orifice increased. Therefore, fuel spray and spray cone angle increases. 3.Fuel viscosity When the viscosity of the fuel inc...

How to control sand for diesel generator set in desert area? The sand control measures are mainly aimed at the air inlet end of the unit, that is, the air intake valve. There is an air filter element at the air inlet end of the unit, but this can only be satisfied with the general environment. In order to avoid the large amount of dust into the engine body, causing early wear of diesel generator set . We can cover the cap of the air filter element with a fine hole gauze to prevent sand. What should we pay attention to the use of diesel generator set in desert area? When operating the unit. 1.After starting the diesel engine, it should idle for 3-5 minutes, and then rise to the rated speed, do not suddenly make it run at high speed. 2.When the diesel generator set is in working condition (with high temperature), it is forbidden to open the water tank cover to avoid scalding. 3.To prevent the components from getting involved in the machine. It is forbidden to s...

Fuel requirements for Cummins generator set: Use high quality light diesel oil with lower temperature. Because of the higher temperature fuel used, the filter can be clogged to reduce power and cause engine starting difficulties. After Cummins generator is shut down, remove the water from the fuel filter in a hot state and replace the filter regularly (250h). If the fuel used is dirty, the filter will be blocked in advance, and the engine power will decrease after the filter is blocked. Requirements for lubricating oil of Cummins generator set: 1) Viscosity in accordance with SAE 15W40 2) Quality meets API CD or higher 3) Change the oil and filter regularly (250h) Note: Engine oil of CF4 or above must be used on the plateau. Because the combustion condition of the engine in the plateau deteriorates, the oil pollution is very fast, the oil life below CF4 level is less than 250h, and the oil change period should be shortened by half. Oil that exceeds the...

The high water temperature of diesel generator set is mainly caused by the following reasons: First, the pump loses its pumping effect. When the weather is cold, the cooling water left in the pump body is not exhausted. The water between the impeller and the inner wall of the pump body may freeze and expand, so that the impeller cannot rotate. After the diesel engine is started, there is no cooling water circulation in the cooling water channel, so that the temperature of the body rises quickly and the water tank is “opened”. In addition, the pin of the fixed impeller is broken or loosened, the water pump shaft rotates and the impeller does not move, the water pump stops pumping water, the cooling water does not circulate, and the water temperature is too high. Second, the amount of water in the cooling system is insufficient. Before the diesel engine starts, there is no sufficient cooling water in the water tank, or the cooling system leaks, the water supply of the pump is...

We can install generator damp proof heater and control panel moisture-proof heater on emergency diesel generator to resolve moisture problem. Because generator damp proof heater and and control panel moisture-proof heater is optional part, when users purchase, should tell the supplier. The attention on moisture-proof for diesel generator set: 1.Heating and drying shall be carried out in clean air, and the generator shall be blown clean with compressed air before drying. If the winding is seriously wet, it needs to be dried by hot air method first. After drying, dry with load to avoid insulation breakdown. When drying, we should put more thermometers in the parts of industrial diesel genset, so as to grasp the temperature of each part and reduce local overheating. Heating shall be carried out slowly to avoid insulation damage caused by sudden evaporation of moisture in the coil. 2.If the drying temperature does not reach the required temperature, it can be dried at a sli...

Keep diesel generator set clean. During the operation of the generating unit, if dust, water stains and other debris enter the interior, a short-circuit medium will be formed, which will damage the insulation layer of the wire, causing a short circuit between turns, and the temperature will rise to burn down the diesel genset. Therefore, dust, water stains and other sundries should be prevented from entering the generator set , and the outside of the diesel generator set should be cleaned frequently to ensure good heat dissipation of the genset. Observe the diesel generator set for vibration, noise and abnormal odor. In the operation of diesel generator sets, especially high-power gen sets, it is necessary to check whether the anchor bolts, the end cover of the generating set, and bearing glands are loose, and whether the grounding device is reliable. If it is found that the vibration of the diesel generator set is intensified, the noise is increased and the odor is genera...

There is no doubt that fuel injection nozzle burning will definitely influence the normal operation of generator set . If you find the related causes, you can quickly solve the problems. 1. Long time idling operation Due to the diesel engine keeps running slowly for a long time, the temperature in the cylinder is low, the fuel combustion is not sufficient, the combustion chamber and fuel injection nozzle are easy to form carbon deposition. So it leads to the deterioration of working conditions for fuel injection nozzle. Especially in winter, it is even more serious under the condition of cold climate. Because the combustion chamber has carbon deposition, heat dissipation is slow, which may cause spray orifice obstruction of the fuel injection nozzle and the oil drip phenomenon  may happen. The fuel stays in the nozzle head for a long time, the local high temperature will make the nozzle and thermal insulation jacket burned. 2. The fuel is not clean Due to there a...

The first way: working grounding. Due to the need of operation and safety of power system, the neutral point is often grounded, which is called working grounding. Working grounding has the following purposes: Reduce electric shock voltage. In systems with ungrounded neutral point, when one phase is grounded, and other two phases touch the human body, electric shock voltage is 1.732 times of phase voltage. While in systems with grounded neutral point, electric shock voltage is reduced to equal or close to the phase voltage. Cut off faulty equipment quickly. In systems with ungrounded neutral point, when one phase is grounded, the grounding current is very small( because there is electric capacity and insulation resistance between conducting wire and ground, it can also form a current path). It is not enough to make the protection device act and cut off the power supply. Faulty grounding can not be found easily, it will maintain for a long time and not safe for human body....