Diesel Generator Tech

Today, we will briefly introduce how to handle the loose fan belt of Cummins diesel generator sets. If you have any further information, please come to consult our Dingbo website. Next, we will introduce relevant materials to you. The first step is to have a detailed understanding of the root cause of the looseness of the fan belt of the  Cummins diesel generator set : firstly, it may be caused by aging, secondly, it may be caused by incorrect model specifications, and finally, it is caused by the deviation of the belt pulley spacing. Aging is the most common factor among these three factors. If the fan belt of Cummins diesel generator sets becomes loose, the exhaust air volume will be greatly affected. The supply and demand balance of the heat dissipation and exhaust air volume of Cummins diesel generator sets is naturally insufficient, which will lead to an increase in the entire mechanical temperature and cause a lot of damage. The belt will age and crack during operation for a ...

Regarding the reason for the speed reduction when using Cummins diesel generator sets, we first need to eliminate the oil circuit problem, so we need to check the low-pressure oil circuit first. Upon inspection, it was found that the low-pressure oil circuit is normal. If the oil-water separator is replaced, the situation still cannot be improved. Later on, it was thought that if there was a problem with the low-pressure oil circuit, an error would definitely be reported. So, we need to consider how to correctly use the fault of the intake pipe of the 200 kw   Cummins diesel generator set . After unplugging the air flow meter, it will not lower the idle speed, but can also increase the speed (the acceleration is a bit slow). Check the air filter of the Cummins diesel generator set to see if it is too dirty. Blow the air filter clean, install it, and test it. When the throttle is released, black smoke will appear. Even if the air filter is not installed for testing, releasing the th...

If the speed of the Cummins diesel generator set is unstable, the first thing to observe is whether there is any leakage at the interfaces of the fuel system. If there is no leakage, loosen the bleed screw of the fuel injection pump and press the hand pump to remove air from the low-pressure oil circuit. If there is no air inside the low-pressure oil circuit, the inlet filter screen of the fuel transfer pump should be removed for inspection. If the oil inlet filter screen of the fuel transfer pump is not blocked, the diesel filter or oil tank inlet pipe should be checked for blockage, air leakage, etc. If the unstable speed still occurs, the following checks and adjustments should be carried out in sequence based on actual usage: 1. Check if the connecting parts are loose, if the pipes are broken, and if the filters are not tightened, and correct them one by one; Check for wear, replace and adjust the transmission rod. 2. Reassemble and adjust the idle spring, readjust the speed limite...

Today, we will briefly introduce the content of solutions for solving the consequences of excessive vibration frequency in   Cummins generator sets . If you have any further information, please come to consult our Dingbo website. Next, we will introduce relevant materials to you. Cummins generator sets may experience vibrations during equipment operation, which is a normal condition. However, how much vibration is present is not a common situation. Considering that excessive vibration not only significantly reduces the production efficiency of Cummins generator sets, but also causes certain losses to the units. It will continue to accelerate the damage to Cummins generator set components, leading to system failures. Considering that the vibration caused by the Cummins generator set during the transition from idle to normal operation is unavoidable. The adverse consequences of excessive vibration in the Cummins generator set: The vibration causes the sturdy connection parts of the C...

Cummins diesel generator sets sometimes experience shooting during operation. At this time, we need to investigate the cause and specific solutions? Below, Dingbo Power Generation Equipment will be introduced in detail to everyone. The  Cummins diesel generator set  experienced severe afterburning in the diesel engine, causing the mixture to enter the exhaust pipe and continue to burn when the exhaust valve was opened, producing an explosive sound. During the intake stroke of a diesel engine, pure air enters the cylinder. It only begins to inject fuel towards the end of the compression stroke, and small droplets of fuel, after certain preparation, reach the ignition condition and burn on their own. Fuel droplets diffuse while burning; This is the diffusion combustion method of the Cummins diesel generator set diesel engine. Injecting early, before compression ignition, too much combustible mixture is formed. When these mixtures burn simultaneously during ignition, it can cause...

After the generator set is cold started, it is not allowed to slam the throttle. As the generator set is shut down without waiting for speed and temperature reduction, the oil content on the friction surface will be insufficient. When the diesel engine runs again, it will be further damaged due to poor lubrication. After the  generator set  shuts down, the circulation of the cooling system water is terminated, and the heat removal capacity is greatly reduced. When encountering hot parts, the cooling is lost, which can easily cause overheating of parts such as the cylinder head, cylinder liner, and cylinder liner, causing cracks, or causing the piston rod to swell too much and get stuck in the cylinder liner. On the other hand, if the generator set is shut down without waiting for speed and temperature reduction, it will result in insufficient oil content on the friction surface. When the diesel engine runs again, it will be further damaged due to poor lubrication. Therefore, b...

  When using diesel generator sets in daily life, it can also cause the refrigerant to not circulate in the system, and sometimes the cause cannot be found. In this article, Dingbo Power Generation Equipment will briefly introduce relevant matters for everyone. The centrifugal water pump of a  diesel generator set  causes common faults. We need to first check whether the function of the centrifugal water pump is normal. If we find that the shaft sleeve of the centrifugal water pump transmission system is damaged beyond the deadline, it indicates that the centrifugal water pump is no longer functioning and must be replaced before all normal circulation systems can operate. The refrigerant level of the diesel generator set is too low or does not meet the requirements. If the liquid level is too low, it is very likely to immediately cause the temperature of the freezing liquid to rise, causing the freezing liquid to not circulate in the system. The freezing liquid should be ...

We believe that most customers use Cummins diesel generator sets with almost all loads turned on and do not follow the relevant user manual for application. All normal applications are: when running the Cummins diesel generator set, it is necessary to check whether the load air leakage switch is disconnected. If the Cummins diesel generator set is not operating normally, the load air leakage switch must not be connected. After application, the load should be cut off first and then the  Cummins diesel generator set  should be stopped. The sequence should be running normally - connecting to the load - disconnecting the load - operating at full load for a few minutes - shutting down - discharging the refrigerant. If operating under load, many electrical equipment will cause a very large amount of operating current when applied with working voltage, which is the instantaneous operating current. In many Cummins diesel generator sets, four maintenance system software will be modifie...

The detachment of the gas valve in the Volvo generator set is a serious fault phenomenon, and its consequences are relatively serious. The main reasons for its occurrence are twofold. Next, Dingbo Power Generation Equipment will briefly introduce to you: On the one hand, it is caused by the detachment of the air valve card group. When the phenomenon is severe, it will cause the air valve top rod to bend and deform, increase the gap between the air valve rocker arm and the top rod, and cause obvious bridge jumping. The air valve lock clip will pop out, ultimately leading to detachment. On the other hand, due to damage to other components, the air valve may fall off. For example, the main function of the air valve lock clamp is to fix it. Once it breaks, it will cause the air valve to fall off, and the bridge conduit can also cause this situation. The bridge conduit's main function is to locate it. Once the conduit breaks, it will cause the bridge to malfunction and collide, causing ...

Today, we will briefly introduce the causes and solutions of the problem of engine oil (or oil-water mixture) spraying out from the generator oil pan. If you have any further information, please come to consult our Dingbo website. Next, we will introduce relevant information to everyone.   Excessive oil injection into the oil pan of the  generator  can also cause oil to come out of the oil dipstick. Pull out the oil dipstick to see if it exceeds the maximum mark by a large amount. If so, the excess part needs to be removed (special reminder: this inspection requires the generator to stop working for about 5 minutes). If the gap between the generator cylinder liner and piston is too large, a cylinder pressure test can be used to detect the cylinder compression ratio. If the compression ratio is low, the cylinder liner piston component (commonly known as the "four matching") should be replaced. If this problem is found after only replacing the piston ring during maintenance...

Today, we will briefly introduce the precautions for generators during maintenance or repair. If you have any further information, please feel free to consult our Dingbo website. Next, we will introduce relevant materials to you. Unauthorized personnel are not allowed to approach the  generator during maintenance  or repair; The generator air circuit breaker should be in the OFF position, disconnect the power switch of the development motor control system, disconnect the "negative" pole line of the battery, and press the emergency stop button. Do not turn on the machine when the fan protective cover or other safety protective cover is removed; Do not attempt to reach under or near these protective devices for maintenance while the generator is running. Keep palms, arms, long hair, jewelry, and loose clothing away from generator pulleys, belts, and other rotating parts. When working in the computer room, it is necessary to wear work clothes, gloves, hats, etc. When the coolant...

  Today, we will briefly introduce the content that pitting corrosion is an important factor affecting the service life and reliability of Volvo generators. Insufficient oil output from the oil pump: There are two types of oil pumps for  diesel generating sets : gear pump and rotor pump. Some gear pumps have a low roughness of the joint surface between the pump cover and the pump body, and the original design did not add a gasket. If a paper gasket is added during maintenance, it will increase the end clearance of the gear and instead reduce the pump's oil output. But there is a gasket at the interface between the pump and the cylinder block. If it is not installed, the pressure oil from the oil pump will leak outward, causing a decrease in oil pressure. Some rotor pumps have chamfers on one side of the outer rotor and no chamfers on the other side. If installed upside down, the oil output can be reduced by 40-60%. In addition, excessive radial and end face clearance of gears ...

  The viscosity of diesel generator oil indicates the internal friction resistance when the oil flows. The viscosity of engine oil is related to the engine temperature. When the engine temperature is low, the viscosity of engine oil is high; On the contrary, the oil viscosity is low. When the viscosity of engine oil is high, its flowability is poor but its sealing performance is good, resulting in less leakage. If the viscosity of the oil exceeds the specified value, the flow resistance of the oil in the lubrication system will increase, and the pressure will also increase. From this, it can be seen that when the engine temperature is low or the viscosity of the oil itself is high (due to improper selection of the oil grade, i.e. the oil grade is not suitable for the ambient temperature, such as selecting oil with high viscosity in summer in winter), the oil pressure will be high. From the lubricating oil circuit of  diesel generators , it can be seen that the flow resistance ...

  The Volvo generator set battery should be soft and firmly installed in the installation frame to prevent damage to the electrode plate and shell due to vibration. The connection between the wire and the pole should be firm and in good contact. When installing batteries in Volvo generator sets, the "live wire" end should be connected first, followed by two sets of batteries in series, and then the "ground" end. When disassembling the battery, the sequence is reversed. When adding electrolyte to  Volvo generator sets , only pure sulfuric acid and distilled water should be used, and no debris such as metal conductors should be dropped; The battery should be kept clean regularly. After removing the oxide on the pole and connecting rod, a layer of lubricating grease (petroleum jelly oil) should be applied to prevent oxidation of the pole and connecting rod. Regularly check the liquid level of the electrolyte in the battery of Volvo generator sets. The liquid level shou...

Many companies purchase generator sets as backup power sources. After a sudden power outage, a generator set can be used to generate electricity, so that work will not be delayed. In addition, residential areas will also purchase   generator sets   for emergency use, allowing everyone to live normally in the event of long-term or short-term power outages. However, many enterprises may discover some faults when using generator sets, and at this point, they may believe that the poor quality of generator sets is actually caused by the lack of maintenance and repair during normal use. How should the generator set be maintained and repaired? To generate electricity normally, the generator set must be controlled through a control panel with indicator lights. These indicator lights can be used to determine whether the machine is functioning properly. If the signal light is not working properly, it can be repaired immediately. The control panel should not have oil or water stains, oth...

In the actual use of generator sets, there may be the phenomenon of fuel entering the oil pan. In order to prevent or minimize this phenomenon, this article will analyze the reasons for it for everyone 1. Analysis of the PT fuel pump inlet of the  generator set The main function of the PT fuel pump is to add low pressure fuel (about 0.8~1.2MPa) and deliver it to the fuel injector. When the main shaft oil seal at the PT pump coupling fails, fuel will pass through this oil seal and enter the oil pan through the timing gearbox. At this point, the PT pump spindle oil seal must be replaced. There is a dual purpose electromagnetic and manual shut-off valve at the outlet of the PT pump. When the ignition switch is turned on, the electromagnetic shut-off valve opens and the oil circuit is connected; When the ignition switch is turned off, the sealing ring of the shut-off valve is closed under the action of the spring plate, and the oil circuit is cut off. When the sealing ring of the shut-...