The hydraulic system is driven by twin Totally Enclosed Fan Cooled (TEFC) electric motors driving pressure compensated axial piston pumps. The drive system gives 100% redundancy as the complete sequence can be completed with one pump. The IP65 solenoid valve is fitted with manual overrides for emergency operation and illuminated caps, giving the operators and ships engineer’s immediate verification of the energised valves controlling operations. All of the automated sequences is controlled by a Siemens PLC the complete electrical system having been supplied by Middlesbrough based MJR Controls. An additional feature is a pendant controller which allows the PLC to be overridden in an event of a proximity switch failure, the pendant is to be used with caution by engineering staff to enable the gangway to be recovered and the hatch closed against the Antarctic’s driving katabatic winds and extreme cold. A secondary emergency hand pump can operate all functions should a total power failure occur.
The sound insulated pumps and optimised power control on all functions plus the use of bio-degradable hydraulic oil (nontoxic to marine life) increases the systems green credentials. The carefully controlled trace heating ensures that the system will function in the harshest conditions both hot and cold as the vessels home base in Australia. This is a first for Tyne Gangway as it is an in-house designed complete control system supported by our partners on the project MJR.
This is a great demonstration of Tyne Gangway’s intent to develop fully powered solutions to complex personnel handling systems internal resources. This then offers the customer a one-stop package, for the complete design and build package adopting full responsibility for the turnkey installation and commissioning.