BS177-179 36Te Tensioner Data Sheet

Sparrows Baricon Ltd., Seton House, Denmore Road, Bridge of Don, Aberdeen. AB23 8JW

Tel: 44-(0)1224-704868 Fax: 44-(0)1224-826417

Model BS177/179 - 36 Te.Hydraulic Tensioner 4 Track

This tensioner comprises of 4 track units each hydraulically driven through an epi-cyclic track gearbox

and bent axial piston hydraulic motor (electric drive versions are available). Standard lubricated

Berco track chains are employed on to which are bolted V profile hard wearing polyurethane track

pads. The track pads can be interchanged for alternative profiles, or for quick release track pads

where multiple profiles are required during an installation.

The lower track unit and one side unit is hydraulically positioned to suit the product diameter using

linear encoders to ensure accurate position. The top track and other side track are also hydraulically

positioned against the product initially at low load, then simultaneously pressurised to the desired

grip load. Hydraulic accumulators ensure the load is continuously applied providing back up in

emergency. The pressure in the accumulators are continuously monitored and topped up if necessary.

The lower and one side track positions are also continuously monitored and adjusted if necessary.

To allow the product to be removed from the tensioner in mid line, or where end terminations are

too large to pass through the tensioner, the top track opens by hinging to one side. The unique

method employed to do this maintains the opening track within the tensioner width thereby

minimising 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 the tensioner is through a PLC and HMI. The HMI is used for calibration purposes and for

setting particular parameters. The PLC monitors 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. The tensioner is currently configured for speed and

direction control. However, with an alternative manifold it can also be configured to provide tension

holdback (render) or tension pull at pre-set tensions when used in the appropriate setup, using the

integral loadcells as feedback to the render control system


Tel: 44-(0)1224-704868 Fax: 44-(0)1224-826417


Specification Summary

Pull Force from idler end. : 36 Te

Pull Force from gearbox end. : 18 Te

Track contact length : 2.4 m

Track grip force total : 400 Te

Cable grip load/m per track : 41.7Te/m

Coefficient of Friction : = 0.09 Max speed laying : 1000m/hr

Max speed recovery : 650m/hr

Height deck to centreline : 1625 mm

Track 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)

Track motor pressure max : 350 Bar

Oil flow auxiliary circuits : 120L/min (2 x 60L/min)

Grip & ancilliary pressure max : 250 bar

HPU power : 2 x 75kW, 3ph, 380V/440V 50/60Hz

Motor current running max : 134A each motor

Motor 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

Instruments/sensors

Loadcells : 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 switch

HPU no oil : Float switch

HPU oil temperature : Thermostat

HPU track oil pressure : 2 x pressure gauges

HPU auxiliary pressure : 2 x pressure gauges


Tel: 44-(0)1224-704868 Fax: 44-(0)1224-826417


Documents

BS177-179 36Te Tensioner Data Sheet