UNOLS | - Andy Henson · 2020-05-29 · Rolls Royce electro direct pull containerised winch with...
Transcript of UNOLS | - Andy Henson · 2020-05-29 · Rolls Royce electro direct pull containerised winch with...
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Andy HensonSynthetic wires: Experience,
Strength and Hope
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Why synthetic?
• 1/8 weight, increased equipment loads• Near neutral bouyancy (0.98 kg/dm³)• Low maintenance• Safer (handling, backlash)• Non-iron sampling• Cost and availability
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Why not?
• Larger sheaves (bend radius)• Vulnerability to damage• Spooling problems• Terminations (resin potted)• Low load operations
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Holdings
• Cortland 24mm plasma cousin trecnic coring RRS Discovery
• Cortland 28mm plasma coring RRS James Cook
• Cortland 16mm MFCTD • Nexans 18mm MFCTD
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Rolls Royce electro direct pull containerised winch withCortland Vectran braided rope.
Containerised direct pull winch.
Top centre shows the spooling with the drum recessed into the container.
The electric drive units are located in a separate section at the rear of the container
Right hand side view showing the 4 electric motors located inside the drum driving the slew ring.
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Rope specification
Cortland rope specification: Cortland specification:
Length = 10000m
4 off Cu Conductor, 18AWG, Voltage rating = 600V
Outer diameter = 15.25mm
Bend radius = 275mm
Weight in air = 225kg/km
Weight in water = 30kg/km
Breaking strength = 9900kgf
Safe working load = 1320kgf
Operating temp = -40degC/+80degC
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Lebus electro-hydraulic direct pull containerised winch with NEXANS 18.5mm Aramid rope.
20 foot containerised winch located on RRS Discovery hanger top.
Portable clean CTD block.Sheave made of Nylotron.
Portable control console with 50m cable with plug both ends for installation inside ships laboratories as required..
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Length = 8000m
4 off Cu Conductor, 0.82mm2, 7x0.39mm, 3.3kV
Outer diameter = 18.5mm
Bend diameter = 750mm
Weight in air = 310kg/km
Weight in water = 40kg/km
Breaking strength = 130kN
Safe working load = 22kN
Aramid armoured CTD instrument cable.
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• Plastic sheath prevents salt crystals forming in Kevlar
• Prevents friction on powered rollers• Direct pull winch
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Coring ropes
• Less system load• Floats in freefall• Slack in sheaves/modified outhaulers• Rope diameter changes while scrolling
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Outhaulers
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Scrolling
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Vision
• 2 winches per ship• Same synthetic wire on both• Money not tied up in wires
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?
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