The Research On Seal Of Piston Pressure Balance Device In Deep Sea

Piston pressure balance device is an important means of deep-seaexploration equipment for equilibrium pressure in deep-sea. Pistons move in thedeep sea is to be flexible but also reliable sealing, and this is a new problem andchallenge. This paper does the following research for piston seal in the deep sea.Firstly, this paper describes the background and significance of the study ofpiston seal structure for deep-sea pressure balance device, and difficultiesencountered under the deep sea. Introduce the principle of piston pressurebalance and its research status, as well as its structure. Summarize the currentstatus of research reciprocating seals.Secondly, the finite element method is applied to the contact mechanicspiston, O-ring and cylinder analysis in this paper. The impact on sealingperformance and O-ring life is analyzed used simulation by working pressure,the seal gap, the compression ratio, O-ring cross-sectional diameter, and the O-ring material parameters. And the O-ring used in deep pressure balancingequipment design methods is summarized. Analyze and compare the X-ring andO-ring, the results showed that X-ring is more suitable than O-ring used in theequilibrium pressure of the deep sea.Thirdly, a sensor structure with deep pressure balanced piston type ispresented in this paper, and analysis of the influence of the seal structure to thesensor, the result show that the improved X-ring seal structure is not only morereliable for sealing, but also reduce the starting pressure, which improve theperformance of deep-sea sensors. So the piston seal structure design principlesare proposed.Finally, the paper summarizes the work done, and looked ahead at futureresearch.