Home > News

products

Piston Ring
Piston
bearing
Timing Kit
Cylinder Liner
Crankshaft
Marine piston ring
Cylinder Head
Dpf Cleaning Machine

VOLVO D13 PISTON

2024-07-08


The piston works under high temperature, high pressure, high speed and poor lubrication. The piston is directly in contact with high temperature gas, and the instantaneous temperature can reach more than 2500K, therefore, the heat is serious, and the heat dissipation conditions are very poor, so the temperature of the piston is very high when working, the top is as high as 600 ~ 700K, and the temperature distribution is very uneven; The top of the piston bears a lot of gas pressure, especially the maximum work stroke pressure, gasoline engine up to 3 ~ 5MPa, diesel engine up to 6 ~ 9MPa, which makes the piston impact, and withstand the role of side pressure; The piston in the cylinder at a high speed (8 ~ 12m/s) reciprocating movement, and the speed is constantly changing, which produces a large inertial force, so that the piston is subjected to a large additional load. Working under such harsh conditions, the piston will deform and accelerate wear, and will also produce additional loads and thermal stresses, while being chemically corroded by gas.
Piston inspection is mainly the measurement of skirt diameter, piston ring groove height and piston pin seat hole size:
① The selection of piston should be determined according to the repair size of the cylinder. Usually the larger size is marked on the top of the piston;
② In the same series of fish, the structure of the piston is not necessarily the same, so when choosing a piston, the corresponding type of piston must be selected according to the type of engine. On the same engine, the piston of the same brand, the same group or the same product code should be selected; The piston of the same model must be used with the same product code to ensure that the difference in diameter and quality of the piston do not exceed the scope specified by the original factory. Otherwise, it will cause poor engine combustion, rough work, economic and power decline and other failures. Therefore, when selecting a piston, the corresponding type of piston must be selected according to the type of engine.