20Te Tensioner 4-Track
Transcript of 20Te Tensioner 4-Track
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Underwater Technology Services (s) Pte Ltd.
35 Pioneer Road, Unit J8Singapore 628503Telephone: +65 6 861 8006Facsimile : +65 6 863 [email protected]
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20Te Tensioner
This tensioner comprises of 4 track units each hydraulically driven through an epi-cyclic track gearbox and bent axial piston hydraulicmotor. Standard lubricated Berco track chains are employed on to which are bolted V profile hard wearing polyurethane track pads.
The lower track unit and one side unit is hydraulically positioned to suit the product diameter using linear encoders to ensure accu-rate position. The top track and other side track are also hydraulically positioned against the product initially at low load, then simul-taneously pressurized to the desired grip load. Hydraulic accumulators ensure the load is continuously applied providing back up inan emergency.
To allow the product to be removed from the tensioner in mid line, or where end terminations are too large to pass through the ten-sioner, the top track opens by hinging to one side. The unique method employed to do this maintains the opening track within thetensioner width thereby minimizing deck space requirements.
A dual Hydraulic Power Unit (HPU) powers the tensioner. Two electric motors are each combined with a dual pump, the main load-sensing pump being for the track drives and a piggyback load sensing pump for the grip circuit and ancillary functions. Control of thetensioner is through a PLC and HMI. The HMI is used for calibration purposes and for setting particular parameters. The PLC moni-tors the complete system from track position settings, to latch cylinder open/close, grip pressure, HPU oil levels and temperatures etc
and allows the tensioner to operate only when in the correct status.
Tensioner Specifications
Description Value
Pull Force from idler end 20 Te
Pull Force from gearbox end 15 Te
Track contact length 2.4 m
Track grip force total 335 Te
Cable grip load/m per track 35Te/m
Coefficient of Friction = 0.09
Max speed laying 1000m/hr
Max speed recovery 650m/hr
Height deck to centre line 1625 mmTrack movement per track 360 mm
Track open clearance 700mm nominal (pad design dependant)
Oil flow to tracks 400 L/min total (2 x 200L/min)
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Track motor pressure max 350 Bar
Oil flow auxiliary circuits 120L/min (2 x 60L/min)
Grip & ancillary pressure max 250 bar
HPU power 2 x 75kW, 3ph, 380V/440V 50/60Hz
Motor current running max 134A each motorMotor starting Star/Delta
Cooling water requirement 200L/min @ 7 bar
Tensioner dimensions 5.14mLx3.3mWx3.32mH - weight 25.0Te
HPU 3.3mLx2.0mWx2.13mH - weight 5.0Te
Cabin 2.2mLx2.0mWx2.5mH - weight 1.5Te
Load cells 2 x 20Te rated
Fixed tracks position 2 x taught wire encoder
Grip tracks pressure 2 x pressure transducer
Top swing track open/close Proximity sensor
Latch cylinders open/close 12 x proximity sensors integral to cylinders
Track speed & distance Encoder
Brake on/off Pressure switch
HPU low oil Float switchHPU no oil Float switch
HPU oil temperature Thermostat
HPU track oil pressure 2 x pressure gauges
HPU auxiliary pressure 2 x pressure gauges
Tensioner HPU
SPECFICATIONS
Power rating 150kW
Voltage 380 415 volts
Max full load current 2 x 130 amps
Frequency 50Hz
Main Drive Pump Flow x 2 200L/min max, 100 L/min @ max pressure
Main Drive Pump pressure Max 300 bar, min 30 bar
Auxiliary pump Flow x 2 60 L/min
Auxiliary pump pressure Max 210 bar, min 30 bar
Gross weight 5000kgWATER/OIL COOLERRequired water flow - Saltwater
220 L/min max
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STORE AND CONTROL VAN
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GA DIAGRAM
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