CJK Electronics supplies electrical control accessories for Diesel generator
The information comes from:the Internet posted on:2023-06-14
Many people know how to use a generator, but they don't understand its break-in period or some vulnerable parts. Cummins generator refers to the power generation equipment that can convert mechanical energy or other renewable energy into electric energy. Generally, our common generator sets are usually driven by steam turbines, water turbines or internal combustion engines (gasoline engines, diesel engines and other engines). In recent years, the renewable new energy includes nuclear energy, wind energy, solar energy, biomass energy, Marine energy and so on. Due to the large capacity of the diesel generator set, it can operate in parallel with the power supply for a long time, and it can also operate independently. It does not operate in parallel with the regional power grid, and is not affected by the power grid fault. Its reliability is high. Especially when the commonly used municipal power supply in some areas is not very reliable, the diesel generator set can be used as the standby power supply, which can not only play the role of emergency power supply, but also can use some usually important loads during power failure through the reasonable optimization of low-voltage system, so it is widely used in the project. The basic principles and structural forms of common generator sets are introduced as follows:
3. Diesel generator set
The diesel engine drives the generator set to operate, and converts the energy of diesel into electric energy. According to different purposes, it can be divided into land diesel generator set and marine diesel generator set.
3.1 Basic principle: The diesel engine drives the generator to operate, converting the energy of diesel into electrical energy. In the cylinder of a diesel engine, the clean air filtered by the air filter is thoroughly mixed with the high-pressure atomized diesel injected by the fuel injector. Under the upward compression of the piston, the volume decreases and the temperature rapidly increases, reaching the ignition point of the diesel. Diesel fuel is ignited, the mixture of gases burns violently, the volume expands rapidly, and the piston is pushed downwards, which is called 'work done'. Each cylinder works in a certain order, and the thrust acting on the piston is converted into the force that drives the crankshaft to rotate through the connecting rod, thereby driving the crankshaft to rotate. By coaxial installation of a brushless synchronous AC generator with the crankshaft of a diesel engine, the rotation of the diesel engine can be used to drive the rotor of the generator. Using the principle of 'electromagnetic induction', the generator will output induced electromotive force, which can generate current through a closed load circuit. This only describes the most basic working principle of the generator set. To obtain a usable and stable power output, a series of diesel engine and generator control, protection devices, and circuits are also required.
3.2 Structural analysis of diesel generator set
A common diesel generator set is mainly composed of three parts: the diesel engine, the generator and the control system. The diesel engine and the generator set have two connection modes, one is flexible connection, that is, the two parts are connected by a coupling, the other is rigid connection, which is made by connecting the generator's rigid connecting plate with the diesel engine flywheel plate by high-strength bolts. At present, the diesel generator sets in the market use rigid connection more often, After the diesel engine and generator set are connected, they are installed on a common chassis and equipped with various protective sensors, such as water temperature sensors. Through these sensors, the operating status of the diesel engine can be visually displayed to the operator. With these sensors, a upper limit can be set. When the limit value is reached or exceeded, the control system will give a warning in advance. If the operator does not take measures at this time, The control system will automatically
