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Experimental study on compressibility modulus of pressure compensation oil for underwater vehicle

Authors
Kim, J.-H.Yoon, S.-M.Hong, S.Min, C.-H.Sung, K.-Y.Yeu, T.-K.Choi, H.-J.Lee, S.-G.
Issue Date
2015
Publisher
Korea Ocean Research and Development Institute
Keywords
Bulk modulus; Deep seabed mining robot; Hydraulic actuation oil; Oil compressibility; Pressure compensating oil
Citation
Ocean and Polar Research, v.37, no.1, pp 73 - 80
Pages
8
Journal Title
Ocean and Polar Research
Volume
37
Number
1
Start Page
73
End Page
80
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/832
DOI
10.4217/OPR.2015.37.1.073
ISSN
1598-141X
2234-7313
Abstract
In order to determine the appropriate volume of the a pressure compensator of deep seabed mining robots, this paper reports on an experimental test for oil volume change in an oil-filled box. At the design stage of underwater robots, it is crucial to determine the capacity of the hydraulic compensator which is replenished as much as the contracted oil volume of the robots. A pilot mining robot, MienRo was designed to work under 6,000 m in the deep sea. The hydraulic actuating oil and pressure compensating oil of MineRo may be exposed at a hydrostatic pressure environment of 600 bar. Although the oil can be assumed to be incompressible, its volume is actually changed under high pressure conditions due to air contained in the oil and oil contraction. To determine the capacity of the pressure compensator, the oil contraction rate should be verified through an experimental test using a hyperbaric chamber. ? 2015, Korea Ocean Research and Development Institute. All rights reserved.
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