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Main Basic Structure of Silent Diesel Generator Set

Feb. 20, 2023

The basic structure of silent diesel generator set is composed of diesel engine and generator. The diesel engine drives the generator to generate electricity. The basic structure of diesel engine is composed of cylinder, piston, cylinder head, intake valve, exhaust valve, piston pin, connecting rod, crankshaft, bearing, flywheel and other components.

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The diesel engine of silent diesel generator set is generally a single-cylinder or multi-cylinder four-stroke diesel engine. Now I will just talk about the basic principle of single-cylinder four-stroke diesel engine: the starting of diesel engine is to rotate the crankshaft of diesel engine by human power or other power to make the piston reciprocating up and down in the top closed cylinder.

The piston completes four strokes in motion: intake stroke, compression stroke, combustion and work (expansion) stroke and exhaust stroke. When the piston moves from top to bottom, the intake valve opens, and fresh air filtered by the air filter enters the cylinder to complete the intake stroke. The piston moves from bottom to top, the intake and exhaust valves are closed, the air is compressed, the temperature and pressure increase, and the compression process is completed.

When the piston is about to reach the top, the fuel injector sprays the filtered fuel into the combustion chamber in a mist and mixes it with high temperature and high pressure air to immediately ignite and burn. The resulting high pressure pushes the piston downward to work, pushes the crankshaft to rotate, and completes the work stroke. After the work stroke is completed, the piston moves from bottom to top, and the exhaust valve opens to exhaust, completing the exhaust stroke. The crankshaft rotates half a turn per stroke. After several working cycles, the diesel engine gradually accelerates to work under the inertia of the flywheel.

When the crankshaft of the diesel engine rotates, it drives the generator to rotate and generate electricity. The generator has DC generator and AC generator. DC generator is mainly composed of generator casing, magnetic pole core, magnetic field coil, armature and carbon brush. Working power generation principle: when the diesel engine drives the generator armature to rotate, because the magnetic pole core of the generator has residual magnetism, the armature coil will cut the magnetic line of force in the magnetic field. According to the principle of electromagnetic induction, the current is generated by magnetic induction and output through the carbon brush.

The alternator is mainly composed of permanent magnets (called rotors) made of magnetic materials and a series of armature coils (called stators) made of silicon cast iron. Working power generation principle:

The rotor is driven by the diesel engine to cut the magnetic line of force axially. The alternating magnetic poles in the stator form an alternating magnetic field in the coil core. The rotor rotates one circle, and the direction and size of the magnetic flux change many times. Due to the transformation of the magnetic field, the induction current that changes in size and direction will be generated in the coil and the current will be transmitted by the stator coil. In order to protect the electrical equipment and maintain its normal operation, the current generated by the generator also needs to be regulated and controlled by the regulator.

As a professional diesel generator manufacturer, we always insist on using first-class talents to build a first-class enterprise, create first-class products, create first-class services, and strive to build a first-class domestic enterprise. If you would like to get more information welcome to contact us via sales@dieselgeneratortech.com.

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