Piston is one of the main moving parts of diesel
engine. The piston passes the gas pressure through the connecting rod to the
crankshaft to realize the transformation of the heat energy to the mechanical
energy. The working condition of the piston is rather harsh, it is with a
temperature of 1400-1800 DEG C, and the pressure. Up to 13MPa gas phase
contact, resulting in a large thermal stress and alternating mechanical
stress.
It is seriously corroded by the gas, and it has strong friction and
impact with the cylinder wall under the condition of boundary lubrication. 1
times
The piston is exposed to high temperature, high pressure and strong
corrosive gas, so it is required to have sufficient strength and
hardness, Good heat resistance and thermal conductivity, high fatigue
strength and corrosion resistance.
In order to reduce reciprocating inertia
force, The piston of a large marine low-speed diesel engine is usually a
crosshead type.
T…