The working principle of diesel engine - Yuch

16/02/2022

        Yuchai diesel generator set is a kind of small power generation equipment, which refers to the power machinery that uses diesel oil as fuel and uses diesel engine as prime mover to drive the generator to generate electricity. The whole set is generally composed of diesel engine, generator, control box, fuel tank, battery for starting and control, protection device, emergency cabinet and other components.
        The basic structure of a diesel engine is: cylinder, piston, cylinder head, intake valve, exhaust valve, piston pin, connecting rod, crankshaft, bearing and flywheel. The diesel engine of Yuchai generator is generally a single-cylinder or multi-cylinder four-stroke diesel engine. The following only describes the basic working principle of a single-cylinder four-stroke diesel engine: the starting of the diesel engine is to rotate the crankshaft of the diesel engine by manpower or other power to make the piston in the top closed cylinder. Reciprocate up and down.
        Yuchai generator 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 of Yuchai generator 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 its apex, the injector sprays the filtered fuel into the combustion chamber in a mist form and mixes with the high-temperature and high-pressure air to immediately ignite and burn itself. journey. After the power stroke is completed, the piston moves from bottom to top, the exhaust valve opens to exhaust, and the exhaust stroke is completed.
        The crankshaft of Yuchai generator rotates half a circle for each stroke. After several working 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 and generate electricity. The generator includes a DC generator and an AC generator.
        The DC generator is mainly composed of a generator shell, a magnetic pole core, a magnetic field coil, an armature and a carbon brush. The working principle of power generation is: when the diesel engine drives the generator armature to rotate, due to the residual magnetism of the magnetic pole core of the generator, the armature coil cuts the magnetic field lines in the magnetic field. According to the principle of electromagnetic induction, the current is generated by the magnetic induction and output through the carbon brush. current.
        The alternator is mainly composed of a plurality of permanent magnets (called rotors) with alternating north and south poles made of magnetic materials and armature coils (called stators) made of silicon cast iron and wound with multiple series coils. Working principle of power generation: The rotor is driven by the diesel engine to cut the magnetic field lines axially. The alternately arranged magnetic poles in the stator form an alternating magnetic field in the coil core. When the rotor rotates once, the direction and size of the magnetic flux change many times. Due to the transformation of the magnetic field, Induced currents of varying magnitude and direction are generated in the coils and delivered by the stator coils.
        In order to protect the electrical equipment and maintain its normal operation, the current from the Yuchai generator also needs to be adjusted and controlled by a regulator.

        The above is the sharing of the working principle of diesel engine, I hope it will be helpful for everyone to understand Yuchai generator.