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Home Industrial Technologies Self-Contained Deep-Sea Lifting Gear

Self-Contained Deep-Sea Lifting Gear


The operation of the deep-sea self-contained lifting gear (APU) is based on blowing off an opening flexible shell with hydrogen generated by reaction of outboard water with the hydroreacting compound.

The gear consists of a hydrogen generator, hydroreacting compound charge (HCC) located inside the generator and a flexible blown off shell.

In the initial state, APU is fixed on the deck of a submersible vehicle (SV) on a special frame with a folded shell, and transported to a sunken object. APU has positive buoyancy, and is held in such a state on the frame with air-operated locks.

Outboard water flows during submersion via the open lower hatch in the generator to its chamber. In contacting with the lower HCC layers, the reaction with water generates hydrogen batches to compensate for increasing external pressure and maintain practically constant gear buoyancy. APU is started by sending a hydro acoustic signal from the SV to open the air-operated locks that keep the flexible blown off shell in the folded condition. The shell is unfolded by generated hydrogen. In acquiring positive buoyancy, APU surfaces together with the object.

Innovative Aspect and Main Advantages

Using hydrogen as a lifting medium allows using the gear practically at any depths of the world Ocean. An effective layout of design elements provides the APU with self-relief from external pressure. The gear has minimal mass and size parameters, and ensures straightforward and safe operation.

Areas of Application

Lifting sunken objects (as well as extending guide ropes for big-tonnage objects). Transporting equipment and constructions for deep-sea oiland- gas pipelines to a specified depth. Development of natural resources of the World Ocean (mining iron and manganese concretions).

APU with opened flexible shell
Fig. 1 APU with opened flexible shell

APU on deck of submersible vehicle
Fig. 2 APU on deck of submersible vehicle

Stage of Development

Completed pilot design project. Two pilot units have been made.

Contact Details

A.N. Podgorny Institute for Mechanical Engineering Problems NAS of Ukraine
Contact person: Kuz’min Dmitrii Vladimirovich
Address: 2\10, Pozharsky str., 61046, Kharkiv, Ukraine
Tel.: (+38 0572) 943 573, (+38 0572) 626 329
Fax: (+38 0572) 944 635, (+38 0572) 942 744
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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