Design and Experimental Study of Pressure Compensation System for Full-Ocean-Depth Gas-Tight Sediment Sampler  

作　　者：Guangping Liu Yongping Jin Youduo Peng Buyan Wan 

机构地区：[1]National-Local Joint Engineering Laboratory of Marine Resources Exploration Equipment and Safety Technology,Hunan University of Science and Technology,Xiangtan 411201,China

出　　处：《Chinese Journal of Mechanical Engineering》2022年第2期279-290,共12页中国机械工程学报（英文版）

基　　金：Supported by National Key Research and Development Program of China(Grant No.2016YFC0300502);National Natural Science Foundation of China(Grant No.517779092);Special Project for the Construction of Innovative Provinces in Hunan(Grant No.2019GK1012);Postgraduate Scientific Research Innovation Project of Hunan Province(Grant No.CX20210985).

摘　　要：Aiming at the requirement of the full-ocean-depth(operating water depth 11000 m)manned submersible to carry out the gas-tight sampling operation of the abyss seabed sediment,a kind of full-ocean-depth carrier submersible mechanical hand-held,full-ocean-depth gas-tight sediment sampler(GTSS)with the function of pressure-retaining and coring is designed.Firstly,the volume change model of pressure compensator is established,and it is pointed out that the volume of pressure compensator is about 16.14%equal to the volume of gas-tight sediment sampler(GTSS).Secondly,the pressure compensator is analyzed and calculated,and the relationship between the precharge pressure of the pressure compensator,the nominal volume of the pressure compensator and the pressure holding effect of the gas-tight sediment sampler(GTSS)is studied.The results show that with the increase of gas precharge pressure in the pressure compensator,the final pressure of the sampler also increases.Under the same precharge pressure condition,the larger the nominal volume of the pressure compensator,the greater the final pressure of the sampler.Finally,the air tightness test method is designed by using the developed gas tightness sampler of the full-ocean-depth product,and the change of the final pressure in the gas tight sampler under different precharge pressure is observed.The test results are consistent with the simulation results,indicating the correctness of the pressure compensation system(PCS)model.

关 键 词：Pressure-retaining sampler Full-ocean-depth Pressure compensator Gas tightness 

分 类 号：P754.3[天文地球—海洋科学] U674.941[交通运输工程—船舶及航道工程]