Diesel Generator Tech

The working principle of the cooling system of a diesel generator set is heat transfer. Heat always moves from hot objects to cold objects. There are three ways of heat transfer: conduction, convection, and radiation. Conduction refers to the heat transfer between two solid objects. For example, heat is transferred from the valve stem to the valve guide. Due to both objects being solid, heat is transferred from the hot air rod to the cold valve guide through conduction. For example, heat is transferred from the air duct to the cylinder head through conduction. Heat can be transferred through convection. Convection is the heat transfer that occurs through the circulation of heat in a liquid or gas. Through convection, the heat from the hot cylinder body is transferred to the coolant, and when the hot radiator components transfer heat to the surrounding cold air, convection also occurs. Radiation is a way of heat transfer. Radiation is the heat transfer that occurs by converting thermal...

The so-called turbocharging is a technology that compresses air before it is supplied to the cylinder to increase air density and intake volume. The turbocharger is the component that implements the technology of boosting. The purpose of a turbocharger is to increase inflation, increase power, improve economy, improve emissions, and improve high-altitude performance. Simply put, it is the use of exhaust gas turbochargers to increase the inflation density, greatly improving the unit mass power ratio of diesel generator sets, and thus widely used in   diesel engines . Exhaust gas turbocharger is a turbocharger that uses the energy of exhaust gas emitted by the engine as a power source to drive. It is actually an air compressor that increases the intake volume by compressing air. It uses the inertia impulse of exhaust gas emitted by the engine to drive the turbine inside the turbine chamber, which in turn drives a coaxial impeller. The impeller is pressurized by air to enter the cylin...

The main factors that cause diesel generator failures in the mechanical fuel injection pump fuel supply system of diesel engines are as follows: (1) Three pairs of precision components are worn. During the operation of  diesel generators , faults in the fuel supply system often occur in three pairs of precision components (namely plunger components, oil outlet valve components, and injector needle valve components) in the high-pressure fuel circuit system. These three pairs of precision components are key components of the entire fuel supply system, and their performance directly affects the working performance of the system and even the entire diesel generator. 1. Plunger parts: Plunger parts are usually ground and selected, so their accuracy is high, their roughness is small, and the fit gap between the two is very small. In use, due to the erosion of high-speed, high-pressure, and diesel with mechanical impurities, wear will occur when the plunger moves back and forth. After the...

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...

The previous article has already shared with you the four major details that need to be paid attention to during the use of diesel generator coolant: selecting clean soft water, not starting without cooling water, not letting the generator set discharge water at high temperatures, and "boiling" to prevent burns. In this article, Dingbo Power Equipment will continue to share with you other details about the use of   diesel generator   coolant. 1. The water discharge is about to be completed, and the diesel engine will rotate several times in time and space When the cooling water stops flowing out, it indicates that the drainage work is about to be completed. The diesel engine starting motor should be used to idle the diesel generator set for a few revolutions, so that the remaining water inside and the water that is not easy to flow out can flow clean due to the vibration of the diesel engine. After the water is drained, the drain switch should be in an open position to preven...

The lubrication method for variable pitch reducers of generator sets is generally immersion lubrication and grease lubrication. After every 6 months of operation of the generator set, the oil quality should be checked as follows: observe the presence of water and emulsion in the oil; Check the viscosity of the oil, and if the difference exceeds 20% or decreases by 15% compared to the original, it indicates that the oil is ineffective; Check the insoluble content, which should not exceed 0.2%, and conduct an anti emulsification ability test to discover whether the oil has deteriorated; Check if the additive composition has decreased. If there are any problems, the oil should be changed or filtered. When changing the oil, the oil is discharged from the oil drain hole and then injected into the oil injection hole. When installing the plug, thread sealant should be applied to the thread. The lubrication system should be kept clean, and measures should be taken to prevent dust, moisture, an...

Cavitation failure of diesel generator set mainly refers to the diesel engine caused by cavitation damage. In fact, cavitation failure of diesel generator set has become an important factor affecting the service life and reliability of modern units. So how can our users avoid such malfunctions in their daily use? How did such a malfunction occur? The   diesel generator set manufacturer   will talk about relevant topics with you, hoping to help you. 1. Usage factors (1) The coolant temperature that is most prone to pitting corrosion is 40 ℃ -60 ℃, so it is important to maintain the coolant at a normal working temperature (80 ℃ -85 ℃) during use. (2) The cooling liquid specified by the diesel generator set manufacturer shall be added instead of hard water or cooling water (liquid) with more impurities. Experiments have shown that hard water containing salts and alkalis has a pitting rate several tens of times higher than clean soft water.  (3) Try to reduce the time for idl...