Ports & Maritime - Cavotec

1 Ports & MaritimeMarket Unit BrochureMotorised cable reels are usually divided into applications for horizontal and vertical reeling with a further distinction being made between Intermittent Duty and Continuous Duty Intermittent Duty applications, our Hydrodynamic System is usually recommended due to its simplicity and re-liability. Key features of this system include compact design, even torque output in reeling and unreeling mode, standard motor and low maintenance. Normal torque outputs are 10-700 daNm with speeds ranging from 10 to 60 Continuous Duty applications, we recommend our family of T-series gearboxes. These can be used with several drive systems and fitted with different drums such as monospiral, random lay, parallel lay and a Pull & Store configuration.

2 We recommend our Torque Motor units for small re-els and slow speed applications (5-40 daNm and 0-60 m/min), while our Cavotec Reel Control (CRC) is best suited for larger reels (torque output 40-750 daNm).Motorised Cable ReelsGUIDELINES FOR CABLE REEL SELECTIONCAvOTEC SpECImAS hAS ESTABLIShED ITSELF AS A LEADING SUppLIER OF INNOvATIvE, ROBUST AND COmpACT SySTEmS, BACkED By ExpERT ENGINEERING CLIENT TEND TO BE DIvIDED INTO ThOSE REqUIRING hORIzONTAL AND vERTICAL mOvEmENT AND BETwEEN INTERmITTENT AND CONTINUOUS USE. 2 Motorised Cable Reels3 The above chart shows different typical cable reel applications related to the most suitable cable reel system and Motor (with drive) Standard squirrel cage motor, according to IEC Norms.

3 Alternatively, the cable reel can be supplied with a pneumatic or hydraulic motor. 2. Gearbox or Torque Unit Seven gearboxes and eight torque units are available with variable output torque from 10-1200 Collector Standard sizes of collectors are available for power and signals. Current ratings vary from 10 to 2400 Amp, voltages up to 30kV. We also manufacture customised collectors exceeding the above parameters. 4. Drum The drums are composed of standard elements and can easily be adjusted to required widths. Standard drum diameters range from 300mm to CABLE REEL SySTEmTypical cable reel applicationsContinuousDutyIntermittentDu ty102040801603206401280 Torque Output (daNm)Large RMGC s Log handlers Bridge Cranes Small 100% ED Small Vertical Applications Drill Jumbos Harbour Stacker & Reclaimers Vertical Applications Ship-to-shore Cranes Pull & Store Applications Trippers Small Cranes Hydrodynamic Torque Motor CRC Small RMGC s Gantry Cranes Large Vertical ApplicationsThe most unique feature of the Cavotec hydrodynamic system is that the clutch acts directly on the main drum shaft.

4 This gives an even torque output in reeling and unreeling modes, independently of clutch slip or reeling speed , thus assuring long cable to its unique design our hydrodynamic system provides a simple and rational solution for many cable and hose reel applications. The system is based on a gearbox in which a reduction gear, clutch and brake are built as one unit. It provides a constant torque output, allowing an even recovery of any type of hydrodynamic cable reel is driven by a standard squirrel cage motor but can also be supplied with a hydraulic or pneumatic motor. Another major advantage is that the torque can easily be readjusted on site. This way, the tension of the cable may be reduced or increased according to the actual 4 Motorised Cable ReelsThe chart above shows typical torque/ speed for a hydrodynamic torque unit with a completely even torque output.

5 The torque variation due to slip or reeling speed does not exceed 5-10%, depending on the size of the torque TorqueDrum speed (rpm)-30-20-100+10+20+301,02,05 Torque/ speed diagramm for hydrodynamic unitThe Cavotec torque motor for cable reels has been designed to provide a virtually constant torque in reeling and unreeling mode. The system is also designed for continuous duty. The resulting mechanical cable tension could be compared to a hydrodynamic system. This has been obtained by using a torque motor with a very flat torque/slip curve. The motors are used up to maximum of 400 rpm and, within this range, the torque fluctuation is approximatley 10%. Besides the motor characteristics, the gearbox efficiency also influence the traction to which the cable is submitted.

6 The T-series gearboxes are designed with this in mind. They incorporate a single shaft planetary gear which makes them highly reversible. The torque motors are equipped with an electromagnetic brake and are servo-ventilated. The standard protection class is IP55 and the motors are suitable for environment temperatures up to 40 C. Special ventilation and motor insulation are supplied for higher temperature Self-braking torque motor2. Pre-reducer3. Gearbox4. Collector5. DrumCAvOTEC TORqUEmOTOR SySTEm12345 6 Motorised Cable ReelsThe Cavotec cable reel with CRC drive is the result of a technical cooperation between drive manufacturers and Cavotec . The CRC system achieves precise speed and torque control of standard maintenance-free squirrel cage motors.

7 A slipping device between motor and gear-box is not needed. The Cavotec CRC driven cable reel allows an almost constant pull on the cable. In fact, by following the torque reference signal computed on the basis of reeling variables such as cable weight, reeled cable on the drum, acceleration or deceleration of the crane, position on the track the CRC minimises the pulling force on the cable. Cavotec has also chosen to use oversized, not force ventilated, motors for reliability and for simplicity in system layout. The result is a longer cable life and increased reliability of the cable reel TORqUE CONTROL (CRC), DRIvE7 12 CavotecSpecimas341. CRC Standard squirrel cage electric motor.

8 One or more motors can be used in Pre-reducer and holding Main CONTROL(CRC)M3 ~ Power supplyInterlocking for craneSignalCavotecSpecimasapplicationsof twarePowerOutputInterlocking for craneBrakesignalChopperResistorEncoderBr ake spring released AUX power220V ACDrumGearboxTransducerTorque referenceProcessingCablereel motorBrake controlcircuitSlipringassembly1. CRC Standard squirrel cage electric motor. On or more motors can be used in Pre-reducer and holding Main slipring applications often require a high degree of de-rating of the current capacity of conventional carbon brush gear. Increasing the physical size of the brushes is not always a solution, since the actual contact area does not increase proportionally.

9 Cavotec has overcome this problem by developing a multi-contact brush gear, which has effectively drastically increased the capacity. A division of the brush into independent sections, thus ensuring a larger effective contact area, achieves BRUShES 8 Motorised Cable ReelsOptical signals are increasingly used in Ports and terminals, where both composite and fibre-optic bundles are meet these demands, Cavotec has developed a fibre-optic rotary accumulator. Thanks to its innovative design, this unit can also be used as a stand-alone rotary accumulator if the reel is equipped only with fibre-optic cable. The housing is made of stainless steel and includes anti-condensation heating elements and rotary limit switches.

10 The signal transmission is uninterrupted, and with a fibre length of about 15 m in the rotary connector, fibre dimming can be dimming of less than 3 dB must be taken into account for the rotary accumulator (including any bilateral connections). The connection is made on either side via plug connectors in the fixed and rotating terminal has developed a range of cable guides designed to ensure smooth cable guiding during crane operation. Engineered to the highest standards, these guides improve the operational life of cables and ensure continuous safe crane OpTICROTARyACCUmULATOR CABLE GUIDES 9 Panzerbelt guarantees the cable inside the channel is entirely protected from vehicles crossing the track and from objects falling into the cable duct.