Research on design and pressure-retaining performance of the pressure-retaining sampler for full-ocean-depth sediment
by Shudong He; Youduo Peng; Yongping Jin; Buyan Wan
International Journal of Materials and Product Technology (IJMPT), Vol. 60, No. 2/3/4, 2020

Abstract: A new type of pressure-retaining sampler (PRS) suitable for full-ocean-depth (11,000 m) sediment sampling is proposed. In order to optimise the pressure-compensation device (PCD) of the PRS, the pressure-compensation model (PCM) is established. This model is adopted to study the influence of different factors on the pressure-retaining performance (PRP) of PRS. The results showed the wall thickness of the PCD had little influence on the PRP, but the pre-charging pressure, ambient temperature difference and working volume had great influence on it, among which the pre-charging pressure had the most obvious influence. Then, a test was carried out. Under different pre-charging pressure, the trend of test pressure-retaining rates were consistent with that of theoretical values, and the error between theoretical and test values were within 5%, which validated PCM. The established PCM can provide theoretical basis for the design of PCD, and the designed PRS can provide new guidance for the design of PRSs.

Online publication date: Tue, 06-Oct-2020

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