6SD1 Diesel Water Pump EX300-3 1-13610944-0 High Toughness

The inner surface of the cylinder liner is directly affected by high-temperature and high-pressure gas, and always has high-speed sliding friction with the piston ring and piston skirt. The surface is in contact with cooling water, and severe thermal stress is generated under a large temperature difference, which is corroded by cooling water. The side thrust of the piston to the cylinder liner not only intensifies the friction on its inner surface, but also makes it bend. The piston also hits the cylinder liner when the side thrust changes direction. In addition, it is subjected to a large installation preload.The gas pressure causes the cylinder wall to produce tangential tensile stress and radial compressive stress, and the inner surface is the largest, and this stress is high-frequency pulsating stress.Due to the great thermal stress caused by the temperature difference between the inside and outside of the cylinder wall, compressive stress is generated on the inner surface and tensile stress exists on the cooling surface under normal temperature. However, under extremely high temperature, the metal near the inner surface creeps and deforms plastically, and the residual tensile stress is formed on the inner surface after cooling. This low-frequency stress caused by the change of starting and stopping will make the material fatigue.