2009•Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and AtomsRequires access
Study on Step-Down Dynamic Process of Hydraulic Cylinder for Control Rod Hydraulic Drive Mechanism
Dazhong Wang
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Abstract
Hydraulic cylinder(HC) is the key component of the control rod hydraulic drive mechanism(CRHDM).According to the characteristics of HC step-down process,the pressure transients in the HC during step-down process can be divided into two processes,that is,the pressure transients before step-down motion and the pressure transients during step-down motion.Theoretical dynamic pressure models of these two processes were built.And among them,the theoretical dynamic pressure model during HC step-down motion can be combined with the HC step-down kinematics model to establish a complete HC step-down dynamic model.The comparison between the theoretical results and the CRHDM single cylinder experiment shows that,under the experimental loadings,the theoretical dynamic pressure transients during the HC step-down process and the HC step-down displacements agree with the experimental results.The research results have laid the theoretical foundation for the acquisition of the key factors affecting the pressure transients of the HC during step-down process and the step motion time of the CRHDM.