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The development of lip seal pressure control device for deep sea

07.17.2009
HHI-EMD(Hydraulic design department) develop lip seal pressure control device for deep sea for the first time. It uses compression air to control automatically the pressure of lip seal’s contact surface by draft change. So HHI-EMD installed this device to its thruster.
The vessel installed this device is half submerged very large heavy block lift vessel. When it load and unload blocks, it controls its position precisely by GPS and thrusters which are installed in the bow & stern on 20M under water surface.
This thruster is very large model (3,000kW & 2,000kW) , extend the seal’s life time 1.5 time by using the developed lip seal pressure control device.
The lip seal pressure control device is more efficient, cheaper than the existing gravity tank type. And it is possible to drive automatically. HHI-EMD developed and installed this core technology for the first time in the world, so it can cope with hereafter demand.
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