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What is the basic structure of a diesel generator?

What is the basic structure of a diesel generator?

The diesel generator is composed of a diesel engine and a generator, with the diesel engine as the power.
The basic structure of the diesel engine is composed of cylinders, pistons, cylinder heads, intake valves, exhaust valves, piston pins, connecting rods, crankshafts, bearings and flywheels. The diesel engine of the diesel generator is generally a single-cylinder or multi-cylinder four-stroke diesel engine.
Let us understand the basic working principle of a single-cylinder four-stroke diesel engine: diesel engine starting is to turn the crankshaft of the diesel engine by human or other power to make the piston reciprocate up and down in the closed cylinder at the top. 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 is opened, and the fresh air filtered by the air filter enters the cylinder to complete the intake stroke. When the piston moves from bottom to top, the intake and exhaust valves are closed, and then the air is compressed, and the temperature and pressure increase, and the compression process can be completed. When the piston is about to reach the top, the fuel injector sprays the filtered fuel into the combustion chamber and mixes it with the high-temperature and high-pressure air and causes it to immediately ignite and burn on its own. The resulting high pressure pushes the piston down and pushes The crankshaft rotates to complete the operation stroke. After the operation stroke is completed, the piston moves from bottom to top, and the exhaust valve opens the exhaust to complete the exhaust stroke. The crankshaft rotates half a revolution for each stroke. After several working cycles, the diesel engine gradually accelerates into work under the inertia of the flywheel, so the crankshaft of the diesel engine can rotate to drive the generator to generate electricity.
The diesel generators are divided into DC generators and AC generators:
DC generator is mainly composed of generator cover, magnetic pole core, magnetic field coil, armature and carbon brush. Working power generation principle: when the diesel engine drives the generator armature to rotate, the armature coil cuts the magnetic field lines in the magnetic field due to the residual magnetism of the generator’s magnetic pole core. According to the principle of electromagnetic induction, the current is generated by magnetic induction and the current is output through the carbon brush .
The alternator is mainly composed of a plurality of permanent magnets (called a rotor) alternately arranged with north and south poles made of magnetic materials and an armature coil (called a stator) made of silicon cast iron and wound with multiple sets of series coils. Working power generation principle: the rotor is driven by the diesel engine to axially cut the magnetic field lines. The alternating magnetic poles in the stator form an alternating magnetic field in the coil core. The rotor rotates once, and the direction and magnitude of the magnetic flux change many times. Due to the transformation of the magnetic field, Induced currents that change in size and direction will be generated in the coils and sent out by the stator coils.
In order to protect the electrical equipment and maintain its normal operation, the current emitted by the generator also needs to be regulated and controlled by the regulator.