Optimization analysis of buffer characteristics of relief valve based on genetic algorithm

JIANG Wei, BAO Cong-wang

(School of Mining & Civil Engineering, Liupanshui Normal University, Liupanshui 553000, China)

Abstract: Aiming at the problem of pressure overshoot of buffer chamber in the relief valve buffer system, the hydraulic cylinder return circuit buffer system connected with the relief valve as the carrier was researched. The simulation model of buffer characteristic of relief valve was built based on AMESim, and the dynamic curve of velocity and displacement of impacted mass and the dynamic curve of pressure and flow of buffer chamber were obtained. An optimization method of buffer characteristic of relief valve was proposed. The ideal model and optimization model of the buffer characteristics of the relief valve were built. Taking the integral of the absolute value of the error between the buffer chamber pressure and the ideal model pressure as the objective function, the relevant structural parameters of the relief valve were optimized based on the genetic algorithm. The results indicate that the optimized relief valve diameter is 22 mm, spring stiffness is 15 N/mm, and spring preload is 700 N. After optimization, the buffer characteristics of the relief valve are improved, and the top pressure reduced 2.2 MPa.

Key words: genetic algorithm; AMESim; buffer characteristics; optimization model; top pressure