Optimization of Pressure Relief Grooves for Multi-Quadrant Hydraulic Machines in Different System Architectures

In hydraulic axial piston machines, each chamber switches between the high-pressure and low-pressure port with every revolution. How this process, commutation, is done, an essential part of pump design. The commutation typically targets a smooth pressure transition to minimize compressible flow pulsations. However, ideal match not possible over whole operating range machine. Thus, relief grooves are considered “necessary evil” in state art, which can reduce pulsations wide on expense slightly increased losses. Depending drive cycle especially number quadrants machine used in, optimal groove design differs. losses for enabling 4-quadrant operation machines shown. Pump-controlled systems lead running different cycles than conventional valve-controlled systems, affecting This paper focuses how optimize thus presents methodology incl. simulation model, formulation objective function, choice optimization algorithm. Optimizations carried out 1-, 2- operation. Pareto fronts trade-off presented, both system pump-controlled carrying same task excavator boom application.