Abstract
This paper presents a new scheme of lifting and lowering base plate used in deep-water exploration ship. The scheme with a wire rope and two fixed pulley acted as rotary lifting points ensures that the base plate can be lifted or lowered when one of the two winches breaks down. A closed circuit system is designed to actuate two winches to lift or lower the base plate. The working principle and characteristics of the hydraulic system was described. The parameters of components in the closed circuits were calculated according to the design conditions and design requirements given. Finally, the hydraulic equipment based on the hydraulic system was tested by using a simple test setup. The results of the test indicate that the hydraulic equipment meets the design requirements.
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