Diesel generator set diesel engine basic concept
Diesel engine is a kind of power machinery that converts the thermal energy generated by the combustion of diesel oil in the working cylinder into mechanical energy. It is mainly composed of cylinder, cylinder head, cylinder liner, piston, connecting rod, brain uranium, flywheel. The inlet valve, exhaust valve and fuel injector are composed.
The functions and relationships of the components are as follows: the intake valve is used to suck in fresh air; The exhaust valve is used to remove the burned exhaust gas of the cylinder. The injector is used to inject diesel fuel into the cylinder to burn the cylinder head, piston and cylinder liner. One end of the connecting rod (small head) is connected with the piston, the other end (big head) is connected with the crankshaft, and the flywheel is fixed on the crankshaft. When the gas in the combustion chamber burns and expands, the side makes the y5 flash move down, and the sleeve is rotated by the connecting rod, and vice versa. Using the inertia force of the crankshaft and flywheel rotating together, it is also possible to push the piston up and down through the connecting rod. In this way, the -K and lower reciprocating motion of the piston constitute the basic conditions for the working cycle of the diesel engine.
When the diesel engine is working, the piston is moved to the top of the cylinder, which is called -L stop; Move to the bottom of the cylinder at position 2, called bottom dead center. The distance between the top and bottom dead center is called the piston stroke (also known as stroke). One stroke of the piston is equal to 1: twice the radius of rotation of the crankshaft. For every stroke the piston moves, bend the riveting for half a cycle.
When the piston is at TDC, the cylinder volume above the top of the piston is called the combustion chamber volume. When the piston is at BDC, the cylinder volume above the top of the piston is called the total cylinder volume. The total volume of the cylinder is the value obtained by the combustion chamber volume, called the compression ratio, which indicates the degree to which the gas is compressed in the cylinder. The greater the compression ratio, the more severely the gas is compressed in the cylinder.
Post time: Jul-12-2024