| China is a major maritime country, with vast sea and long coastline. Rescue and salvage in the deep sea is an important part of the national emergency support system, thus the development of special equipment and the corresponding operation technology which has strong ability for salvage in deep sea environment is the important mission to complete. Aming at the reciprocating hydraulic underwater tools for salvage in deep-sea environment, prototypes of the wire rope cutter and the hydraulic spreader which were equipped on ROV has been developed and the miniaturization design were studied.In this paper, the comparison and analysis of wire rope cutter with different structural styles were done and the overall program was proposed according to the technical specifications. Cutting force of wire rope with different diameters was determined through experiments, reasonable structure and parameters were designed, and the static simulation and analysis of the wire rope cutter was carried out using ANSYS Workbech. The structure has been optimized based on the principle of miniaturization and weight-saving design.The overall structure of the hydraulic spreader were determined and the parameters of key components were calculated through geometry analysis, kinematics analysis and mechanical analysis, thus the expansion forces at different positions were derived. Dynamic simulation of the hydraulic spreader was researched using ADAMS and the forces of all pin spindles were got, so the miniaturization design of pin spindles, connecting rods and expansion arms were studied.The prototype of the wire rope cutter and the hydraulic spreader were completed. The land test system was established and the test hydraulic pressure was set up to 70 MPa. Test results also show that the performances of the two tools meet the design requirements, which can offer a reference for the consequent studies. |
