Diesel generator set working principle What is the working principle of diesel generator?

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

Let's talk about the basic structure of the diesel engine first: it is composed of cylinders, pistons, cylinder heads, intake valves, exhaust valves, piston pins, connecting rods, crankshafts, bearings and flywheels and other components. The diesel engine of the diesel generator is generally a single-cylinder or multi-cylinder four-stroke diesel engine, and I will only talk about the basic working principle of the single-cylinder four-stroke diesel engine

Diesel engine starting is to rotate the diesel engine crankshaft by manpower or other power, so that the piston reciprocates up and down in the cylinder closed 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 opens, and the 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, and the temperature and pressure are increased to complete the compression process. When the piston is about to reach the apex, the injector sprays the filtered fuel into the combustion chamber in the form of a mist and mixes it with the air of high temperature and high pressure to ignite and burn it immediately, and the high pressure formed pushes the piston to work downward, drives the crankshaft to rotate, and completes the work stroke.

After the work stroke is finished, the piston moves from the bottom to the top, and the exhaust valve opens to exhaust the exhaust to complete the exhaust stroke. Each stroke crankshaft rotates half a turn. After several duty cycles, the diesel engine gradually accelerates into work under the inertia of the flywheel.

The rotation of the crankshaft of the diesel engine drives the generator to rotate to generate electricity, and the generator has a DC generator and an alternator.

DC generators are mainly composed of generator shells, pole cores, magnetic field coils, armatures and carbon brushes. Working power generation principle: when the diesel engine drives the generator armature to rotate, due to the remanence of the magnetic pole core of the generator, the armature coil cuts the magnetic field lines in the magnetic field, and according to the principle of electromagnetic induction, the current is generated by the magnetic induction and the current is output through the carbon brush.

The alternator is mainly made of magnetic materials, with a permanent magnet (called a rotor) arranged alternately with multiple north and south poles, 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 cut the magnetic field lines axially, the alternating magnetic field is formed in the core of the alternating magnetic pole circle in the stator, the rotor rotates once, the direction and magnitude of the magnetic flux change many times, due to the transformation of the magnetic field, the induced current of the size and direction of the change will be generated in the circle and the current is transmitted by the stator coil.

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 a regulator.

1. Diesel generator is a kind of small power generation equipment, which refers to the power machinery that uses diesel fuel and diesel engine as the prime mover to drive the generator to generate electricity. The whole unit is generally composed of diesel engine, generator, control box, fuel tank, starting and control battery, protection device, emergency cabinet and other components.

2. Principle: In short, the diesel generator drives the generator to run.

In the cylinder, the clean air filtered by the air filter is fully mixed with the high-pressure atomized diesel injected by the fuel injector, and under the extrusion of the piston, the volume is reduced, and the temperature rises rapidly to reach the ignition point of the diesel. The diesel fuel is ignited, the gas mixture burns violently, and the volume expands rapidly, pushing the piston downward, which is called 'work'. Each cylinder works in a certain order, and the thrust acting on the piston becomes the force that pushes the crankshaft to rotate through the connecting rod, thereby driving the crankshaft to rotate.

By installing the brushless synchronous alternator coaxially with the crankshaft of the diesel generator, the rotor of the generator can be driven by the rotation of the diesel generator, and the generator will output an induced electromotive force by using the principle of 'electromagnetic induction', and the current can be generated through the closed load loop.

Here only the most basic working principle of the generator set is described. A serviceable, stable power output requires a range of diesel generators and generator controls, protection devices, and circuits.

Diesel generator set composition working principle explained.