Modular Offshore Turntable

Technical specification

Turntable construction

Turntable construction ln accordance with existing HICE-design (DNV-GL design-approval)

Foundation c/w 2 tracks of loadbearing wheels (h=508 mm)
Track 1 with diameter 6,640 mm and surface 26 m2
Track 2 with diameter 11,520 mm and surface 40 m2
Track 1 contains 18 pcs loadbearing wheels in hinged carrier
Track 2 contains 36 pcs loadbearing wheels in hinged carrier
Foundation c/w 2 tracks of loadbearing wheels (h=508 mm)

Central bearing connected by star-frame to track 1/2
Turntable deck consisting of 18 segments, 6mm steel plated Outer/inner walls consisting of 4 m high interconnected SHS120, connected by rolled Bulb-Profile

Dimensions

Outside diameter 14.2 m Inside diameter 4.0 m
Basket internal height 4.0 m
Basket bottom height 0.85 m

Drives

Electro-Hydraulic power unit, 2 x 75 kW, 400 V 50Hz
4 x hydraulic HICE-sprocket drive (50% redundancy) approx. 20 kW with fixed ring gear on turntable deck HPU can be operated separately

Coating

1 x primer ‘jotun’ 0.150 mm
1 x topcoat ‘jotun’ 0.050 mm RAL 5010 blue

General information

HICE lifting system

hydraulic compensation system with 40 mm strake lifting the Turntable deck from 0 mm (fixed, non-rotating) to + 40 mm (maximum strake, rotating) by means of 54 cylinders (stainless rod) divided over 6- sections

Weight/Capacity

Mass (empty) approx. 100 t (depends on final lay out) Carrying capacity 1,000 t

Load bearing wheels

54 pcs cast iron wheel 400 mm diameter bearing capacity 20.5 t/wheel

Load distribution

the static Uniform Distributed Load (UDL) generated through the 2 foundation track with the turntable loaded to maximum capacity is approx. 12 t/m2 The foundation tracks are 1.2 m wide with a combined surface of approx. 71 m2

General:

DDNV-GL certified

Performance data

Modular Offshore Turntable

Rotational speed 1,200 m/hour at centre core (ID)
Electrical requirements 400V/50Hz power supply included
Parking brake 20 seconds from 0 - max.
Accelerations with full load 20 seconds from max. to 0
Braking with full load 10 seconds from max. to 0
Fast Stop Braking with full load <5 seconds from max. to 0
Emergency Stop Braking with full load 1,200 m/hour at centre core (ID)