Reciprocating Compressors for LDPE applications operating at pressures over 3000 bars require advanced methods for designing cylinders components. Packing cups undergoing very high-pressure fluctuations and severe operating conditions are designed by FEM to determine the stress level in a more accurate way. Considering boundary conditions, complex geometry and the consequent stress risers, the procedure allows to optimize the cups profile, giving a strong contribution to machine performance and plant availability. Challenging performance and capacity change requirements are faced by using innovative solutions related to simulation methods, technologies and diagnostic systems. FEM is used to make a comparison of the stress state during normal operating conditions, between the original solution and a modified one. The modified application requires a higher capacity and consequently a bigger plunger diameter and a different geometry of packing cups. In addition, site feedback and Service engineering are essential to improve safety, reliability, availability, and maintainability, as well as general performance of the machines, particularly for high-pressure cylinder components.
展开▼
