Marine diesel engine parts describes the working conditions of cylinder liner

1. Function

(2) The four-stroke machine is the guide of the piston movement and bears the side thrust. (3) The two-stroke machine and the piston movement cooperate to control the air exchange process. (4) The cooling water space is formed with the cylinder body.

2. Working conditions

① To withstand periodic changes in the pneumatic force: radial: contact surface pressure stress Z is large, cooling surface is zero. Tangential: the tensile stress Z on the fire contact surface is large, and the tensile stress Z on the cooling surface is small. (2) The role of heat load: compressive thermal stress on the fire contact surface, tensile thermal stress on the cooling surface. The inner surface is subjected to chemical corrosion of gas, and the outer surface is subjected to corrosion of cooling water. ⑤ The cylindrical piston is subjected to cavitation of cooling water.

3. Materials

It is made of heat-resistant and wear-resistant alloy cast iron, the inner surface is plated with chromium to improve the wear resistance, and the outer surface is coated with anti-rust paint or zinc block.

4, Marine diesel engine accessories type:

① Good heat dissipation, ② cylinder liner thickness, good rigidity, ③ easy to manufacture and replace, ④ easy to produce cavitation and corrosion.