What is the function and principle of the generator on the diesel engine?

The basic structure of diesel generator is composed of diesel engine and generator, and the diesel engine is used as power to drive the generator to generate electricity.

First, the basic structure of a diesel engine is composed of cylinder, piston, cylinder head, intake valve, exhaust valve, piston pin, connecting rod, crankshaft, bearing and flywheel. The diesel engine of diesel generator is generally a single-cylinder or multi-cylinder four-stroke diesel engine.

Next, I will only talk about the basic working principle of a single-cylinder four-stroke diesel engine: the diesel engine starts by turning the crankshaft of the diesel engine by manpower or other power, so that the piston moves up and down in a closed cylinder at the top. The piston completes four strokes in motion: intake stroke, compression stroke, combustion and power (expansion) stroke and exhaust stroke. When the piston moves from top to bottom, the intake valve opens, and the fresh air filtered by the air cleaner enters the cylinder to complete the intake stroke. The piston moves from bottom to top, the intake valve and exhaust valve are closed, the air is compressed, the temperature and pressure rise, and the compression process is completed. When the piston is about to reach the zenith, the fuel injector will spray the filtered fuel into the combustion chamber in mist, mix it with high temperature and high pressure air, and immediately ignite the self-ignition. The formed high pressure pushes the piston to do work downward and pushes the crankshaft to rotate, thus completing the power stroke. After the power stroke is completed, the piston moves from bottom to top, and the exhaust valve opens to exhaust, thus completing the exhaust stroke. The crankshaft rotates half a turn per stroke. After several working cycles, the diesel engine gradually accelerates under the inertia of the flywheel.

The rotation of diesel engine crankshaft drives the generator to rotate to generate electricity. Generators include DC generators and alternators. Basic working principle: the diesel engine drives the generator to run, which is fundamental. Convert the energy of diesel into electric energy. In the diesel engine cylinder, the clean air filtered by the air filter is fully mixed with the high-pressure atomized diesel oil sprayed by the fuel nozzle. Under the upward extrusion of the piston, the volume decreases and the temperature rises rapidly, reaching the ignition point of diesel oil. The diesel oil is ignited, the mixture burns violently, the volume expands rapidly, and the piston moves downward, which is called doing work. Each cylinder does work in turn according to a certain order, and the thrust acting on the piston becomes the force to push the crankshaft to rotate through the connecting rod, thus driving the crankshaft to rotate. When the brushless synchronous alternator is installed coaxially with the crankshaft of the diesel engine, the rotor of the generator can be driven by the rotation of the diesel engine. Based on the principle of electromagnetic induction, the generator will output induced electromotive force and generate current through a closed load loop.

Only the most basic working principle of the generator set is described here. In order to obtain available and stable power output, a series of diesel engine and generator control and web page design are needed.

Protect equipment and circuits. Structural analysis of diesel generator set: An ordinary diesel generator set is mainly composed of diesel engine, generator and control system.