Seawater Hydraulic Rock Drill Impact Mechanism Model Validation

摘要

The Naval Facilities Engineering Service Center (NFESC) has developed andevaluated a computer model of the single poppet-kicker port linear impact mechanism used in the seawater hydraulic rock drill. The project objective was to identify hydraulic and dynamic elements influencing impact mechanism operation. A goal of this investigation was to determine whether or not computer modeling of the impact mechanism for the seawater hydraulic rock drill would lead to an improved linear impact mechanism suitable for a hand-held, diver-operated rock drill. Having achieved qualitative model response, the model served as an analysis tool for evaluating proposed changes toward achieving a minimum 7 foot-pound blow energy. Model parametric studies lead to validation of predicted