Diesel Generator Tech

When repairing generator sets, it is of great significance to correctly remove oil and impurities from the surface of components to improve repair quality and extend the service life of machinery. Failure to strengthen the cleaning of parts, improper selection of cleaning agents, and improper cleaning methods can lead to early wear and corrosive damage of components. If the impurities in the bolt holes of the  generator set  and the sand particles in the hydraulic components are not thoroughly removed, resulting in insufficient bolt torque, easy fracture of the piston ring, erosion of the cylinder gasket, and early wear of the hydraulic components: during major repairs, attention is not paid to removing oil stains or impurities accumulated in filters, lubricating oil channels, etc., which leads to incomplete maintenance work and reduces the equipment's trouble-free operation time. When cleaning components, repair personnel should choose the correct cleaning agent. For the clea...

Today, we will briefly introduce the diagnosis and treatment of abnormal noise in the fan blades of diesel generator sets. If you have any further information, please come to consult our Dingbo website. Next, we will introduce relevant materials to you. When a  diesel generator set  is in operation, as the fan blades are used for a long time, there may be a sudden "clattering" noise, especially as the engine speed increases, the noise also increases accordingly. This phenomenon is called fan blade abnormal noise. The diesel generator set believes that this may be due to the vibration of the fan blades of the diesel generator set, resulting in loose rivets between the blades and the fan blade hub. The fastening screws of the fan are loose. Cracks have appeared at the root of the fan blades, changing the tilt angle of the blades. Broken fan blades, etc. If abnormal noise is suddenly heard during the operation of the car, the engine should be immediately turned off...

Recently, detailed research has been conducted on the issue of water ingress into the oil pan of diesel generators. There are many reasons for water ingress, including perforation during disassembly, damage to the oil radiator, and damage to the cylinder head. In this article, Dingbo   Power Generation   Equipment will discuss the water ingress into the oil pan caused by cylinder gasket damage. The cylinder head of the diesel generator and the cylinder block of the diesel engine are sealed by a cylinder gasket, and the water channel of the cylinder block has corresponding sealing rings on the cylinder gasket to ensure that the coolant does not leak. If the flatness error of the cylinder head or cylinder block plane of a diesel engine exceeds the allowable range, it will inevitably cause the cylinder gasket to be not tightly sealed, and coolant may leak into the oil pan. In addition, if the diesel engine cylinder head bolts are not tightened according to regulations or the surf...

Heating during operation is a common malfunction of the brushes and collector rings of Cummins diesel generator sets, which can affect the normal start-up and operation of   Cummins diesel generator sets . There are three types of reasons for heating faults of brushes and collector rings. Below, Dingbo Power Generation Equipment will conduct a detailed analysis. Poor ventilation Poor ventilation is mainly due to blocked cooling air ducts, blocked ventilation channels and holes on the surface of the collector ring, and decreased air volume of the circulating fan. Especially when the surface temperature of the collector ring is too high during operation, the wear of the brushes increases, and the accumulation of carbon powder increases, which may block the heat dissipation channel on the surface of the collector ring. Excessive or uneven distribution of contact resistance The collector ring and brush conduct excitation current through sliding contact with each other, with approximate...

When the turbocharger of a diesel generator set operates at a certain speed, the airflow flow rate of its compressor is reduced to a certain extent due to certain factors. The airflow in the compressor will experience strong oscillation, causing blade vibration and surging noise at the inlet of the compressor, resulting in a significant decrease in intake pressure. This phenomenon is called compressor surge. Surging can lead to unstable operation, reduced power, and black smoke from the exhaust, and in severe cases, it can cause damage to the compressor. Fault cause: (1) Air intake blockage. The surge of the  diesel generator  compressor is mainly caused by blockage in the intake system, such as severe blockage of the air filter element, severe aging and flattening of the intake hose, and blockage of too much oil stains in the intake pipe. Due to blockage, the turbocharger delivers insufficient air to the cylinder during operation, resulting in significant fluctuations in air ...

  Do you know the drying methods for diesel generator sets after damping? If diesel generator sets are used outdoors or do not take appropriate moisture-proof measures, they are prone to dampness in rainy and snowy weather. However, if the unit is not promptly treated due to moisture, it will seriously affect the performance and service life of the   diesel generator set . The correct method should be to dry the equipment in a timely manner after wetting. Today, two drying methods will be introduced, the oven (furnace) baking method. If conditions permit, the entire motor (stator and rotor are disassembled) will be gradually heated and baked in the oven (furnace). The oven (furnace) should be ventilated to remove moisture from the motor and sandwiched in the middle. The motor discharges in the inner layer and heats in the outer layer. The temperature of the inner layer should be maintained between 90 and 100, and there should be no open flames, smoke, or other flammable and co...

What do you think should be paid attention to when assembling a diesel generator set? The equipment address of the diesel generator set should have excellent ventilation, the generator end should have satisfactory air inlet, and the   diesel generator set   end should have excellent air outlet. The area of the air outlet should be more than 1.5 times that of the water tank. The surrounding area of the diesel generator set equipment should be kept clean to avoid placing items that can cause corrosive gases and vapors such as acid and alkaline in the vicinity. If conditions permit, rescue equipment should be equipped. When diesel generator sets are used indoors, it is necessary to guide the smoke exhaust pipes to the outside. The pipe diameter must be ≥ the diameter of the exhaust pipe of the muffler, and the elbows of the connected pipes should not exceed 3 to ensure smoke evacuation. The pipes should be tilted down 5-10 degrees to avoid rainwater injection. If the exhaust pipe...

Have you ever learned about the magnetic wire cutting motion of Cummins diesel generator sets? Firstly, they are driven by water turbines, steam turbines, diesel engines, or other power machinery. It converts the energy generated by water flow, airflow, fuel combustion, or atomic fission into mechanical energy, which is then converted into electrical energy by a   generator . The rotor is wound by the rotor core (or pole yoke), washer, center ring, slip ring, fan, shaft, and other components. The stator and rotor of the generator are connected and assembled through bearings and end caps, allowing the rotor to rotate in the stator and cut off the magnetic field lines, thereby generating induced electromotive force. This induced electromotive force is led out through connecting terminals and connected to the circuit, thereby generating current. Cummins diesel generator sets, whether diesel or gasoline, generate a certain order of electricity from each cylinder. The thrust acting on t...

What are the taboos when starting a diesel generator set that you know? Firstly, avoid not supplying oil according to regulations, do not add cooling water to the water tank after starting, and do not pull the engine to start. If the diesel generator set is pulled down to start when the cold engine oil is viscous, it will exacerbate the wear and tear between the moving parts, thereby reducing the service life of the   diesel generator set . Avoid changing lubricating oil and fuel on schedule. The temperature in winter and summer is different, and the oil used is also different. In high temperature areas in summer, if lubricating oils with good high-temperature resistance indicators (such as 40, 50, 60, etc.) are not used, the antioxidant stability of the lubricating oil will deteriorate, exacerbating its thermal decomposition, oxidation, and polymerization, and it is easy to deteriorate. The viscosity of lubricating oil will decrease with the increase of temperature, which can easi...

The first is the dry start or the sudden addition of boiling water. If there is no cooling water after the diesel generator set starts, the temperature of the cylinder assembly, cylinder head, engine block and other parts will rise sharply. At this time, adding cooling water will cause the hot cylinder liner, cylinder head and other important parts to burst or deform due to sudden cooling. However, if you suddenly add about 100 ℃ boiling water to the cold engine block before starting, the cylinder head, engine block, cylinder liner and other parts will also crack, It should be added when the water temperature drops to 60-70 ℃. Secondly, increase the throttle to start the diesel generator set, and do not fill the fuel valve when starting the diesel generator set. Generally, it is enough to put the throttle on the idle position, but many people sharply increase the throttle before or during the startup in order to make the Diesel generator start quickly. The harm of this approach is: (1)...

Each generator brand has its own oil mist protection system. Its main protection element is the oil mist detector, which can timely detect whether the generator has oil mist formed in the generator crankcase due to excessive air leakage and other faults caused by bearing overheating or piston ring damage, so as to monitor whether the main operating components of the generator, crankshaft and cylinder, work normally. During the operation of the   generator , it continuously extracts the oil and gas in the crankcase through the sampling pipeline system and sends them to a sensitive and accurate concentration measuring device. The photoelectric diode senses the light intensity generated by infrared radiation and converts the generator's light intensity signal into an electrical signal to be sent to the electronic identification device. If the gas in the generator crankcase contains oil mist, the opacity of the measurement channel of the concentration measurement device will increase. ...

Cummins engine is famous engine brand. Cummins generator set covers all around the world. It is also divided into various series, NT series, K Seris, and other series, etc. Here, we mainly talk about Cummins QSG12 Series diesel genset – new product. This new product offers more power for less space, by delivering a much higher power density and a more reliable power solution. The series is available from 400-450kVA and powered by a Cummins four cycle, inline, six-cylinder dual speed diesel engine offering more robust performance using less fuel. Features also include extended service intervals of 500 hours, lower fuel consumption and unaided cold start capability at 12°C. “MEE 2018 is a perfect platform for Cummins to debut its refreshed product line-up for the power-generation sector,” Alok Joshi, Cummins Power Generation, director, Africa and Middle East, said. “Cummins is a long-time exhibitor at MEE, having had a major presence at this leading power-generation exhibition f...