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The working principle of Marine diesel generator
Update:2017-02-13 Tags:the

The basic structure of the diesel generator 700kva generatoris composed of diesel engine and generator, diesel engine as power driven generator to produce electricity.

Say first the basic structure of the diesel engine: it consists of cylinder, piston, cylinder head, inlet valve, exhaust valve, piston pin, connecting rod, crankshaft, bearing and flywheel component composition. Diesel generators of the diesel engine is single cylinder or multi cylinder four stroke diesel engine, I only work about single cylinder four stroke diesel engine under the basic principle: diesel engine starting is through human or other power rotation diesel engine crankshaft to the piston at the top of airtight cylinder reciprocating movement up and down. The movement of the piston to complete four stroke: the intake stroke, compression stroke, combustion and power stroke and exhaust stroke (inflation). When the piston by the downward movement on the inlet valve is opened, the air filter filtration of fresh air into the cylinder to complete the intake stroke. The piston from down to up, into the exhaust valves are closed, the air is compressed, higher temperature and pressure, to complete the compression process. Piston will be arrived at the top, the fuel injector to the filter to mist sprayed into the combustion chamber with high temperature and high pressure air mixed burning themselves immediately, formed by high pressure forces the pistons to work conditions at the lower levels, promote the crankshaft, complete the work schedule. After finished work schedule, the pistons from down to up, exhaust exhaust door open, complete the exhaust stroke. Each trip crankshaft half a circle.

After several work cycle diesel engine under the inertia of the flywheel speed gradually into the work.

Diesel engine crankshaft is driven in generator power, generator has a dc generators and alternator.

Dc generator is mainly composed of generator body, magnetic core, magnetic field coil and armature and carbon brushes, etc. Working power generation principle: when the diesel engine generator armature rotates, because the generator of the magnetic core remanence, so the armature coil cutting lines of magnetic force in magnetic field, according to the principle of electromagnetic induction, produced by the induction current the output current and the carbon brush.

Ac generator is mainly composed of magnetic materials manufacturing multiple poles arranged alternately permanent magnets (called rotor) and silicon cast iron manufacturing and have multiple sets of series coil around the armature coils (called stator). Power generation principle of work: rotor axial cutting lines of magnetic force driven by diesel engine, the stator pole arranged alternately in iron core formed in the alternating magnetic field in coil and rotor rotation, the direction of the magnetic flux and size transform many times, due to the effect of transformation of the magnetic field, will result in a change to size and direction are in coil conveying the current induced current and the stator winding.

In order to protect the electric equipment, and maintain its normal work, the electric currents generated by generator also need adjusted regulator control and so on.

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