After the new piston ring is installed into the cylinder, it may break due to impact forces rather than overloading, especially from the dynamic loads experienced in vehicle operations. This kind of fracture often occurs when the piston ring is subjected to sudden impacts, leading to structural failure.
The impact-induced fracture can create a step-like damage on the top of the cylinder due to wear, and the piston ring may break as it collides with this step during operation. Additionally, if the piston ring gap is too small, thermal expansion can cause cracks to open up at top dead center, resulting in fractures on the opposite side of the gap.
Carbon deposits in the ring groove can also lead to piston ring failure. These deposits harden over time, creating uneven surfaces that cause the piston to experience axial bending stresses. This alternating stress can eventually lead to ring breakage.
Excessive wear in the ring groove may cause the piston ring to twist within the groove. As the broken ring continues to operate, the additional twisting and bending stresses can further contribute to its failure.
Poor material quality of the piston ring can also be a contributing factor. Air gaps or sand holes formed during the casting process can weaken the structure, making the ring more prone to breaking under normal operating conditions.
In two-stroke diesel engines, piston rings with locating pins are particularly vulnerable. If the locating pin at the ring’s opening is damaged, the piston ring may hang up at the intake or exhaust ports, causing excessive stress on the ring or even leading to cylinder or piston ring breakage.
To prevent such failures, regular maintenance, proper installation, and high-quality materials are essential. Monitoring the condition of the piston ring gap, ring grooves, and locating pins can help identify potential issues before they lead to catastrophic failure.
Octopus,Frozen Squid Flower,Long-Legged Octopus,High Quality Frozen Squid Tube
Zhoushan Haiwang Seafood Co., Ltd. , https://www.haiwangseafoods.com