Electrical Mechanical Services - Rotec Hydraulics Ltd

Motor Overhaul for Cruise Ship

Rotec’s Electrical Mechanical Services division completed the overhaul of 21 ship’s motors last month for a leading leisure industry company.

The cruise ship, who carries thousands of passengers each year, voyages throughout the Baltic, Norwegian Fjords, and the Mediterranean. In regular use, our engineers had a strict time limit of 14 days to remove, overhaul and reinstate all 21 motors whilst the ship was in dry dock.

The scope of works included:

Removal and inspection

Safe and efficient electrical and mechanical disconnection of all 21 motors, including the port and starboard anchor winch motors.
Thorough inspection of all plate detail and insulation valves.

Overhaul

Full steam cleaning of the motors and re-varnishing as required.
Baking of the motors in a temperature-controlled oven to ensure proper curing of the varnish and to remove any residual moisture.
New bearings fitted where required.
Repair of worn end-shields by sleeving and machining back to tolerance.
Replacement of brake pad discs with excessive wear.
Insulation tests conducted at 500 volts to ensure electrical safety and integrity.
Dynamic balancing carried out to avoid unnecessary vibrations, reduce noise, prevent mechanical failure, and improve balance and efficiency.
Inspection of all electrical cables for damage.

Reinstallation

Safe and efficient reinstallation of all 21 motors back onto the ship.
Careful reconnection of all electrical and mechanical components.

Report

A detailed report, with images of all motors, was completed and a copy sent to the client upon completion.

All work was completed within the 14 day schedule deadline.

The completed overhaul will significantly improve the reliability and lifespan of the ship’s motors, reducing the risk of unexpected breakdowns and ensuring continued safe and efficient operation.

If you would like more information on Rotec’s Electrical Mechanical capabilities, contact sales@rotec.net or call 01823 348900.

Remote system fitted to quarry conveyor improves safety and operational control

100% Achilles audit _Rotec Hydraulics Ltd

Rotec Hydraulics have designed and installed a remote system, improving safety and operational control for our client at a significant limestone extraction quarry located within the South West of England.

Our customer utilises two tracked crawler vehicles to lift and manoeuvre a length of conveyor into position at the quarry. Previously, the vehicles had to be driven locally by personnel on the machine. To increase safety there was a request to design a system which would allow the machines to be operated remotely, keeping persons away from potential falling objects on the conveyor.

The remote system has additional benefits – including improving efficiency and the communication between machine operators because they can now stand next to each other and tandem lift with greater synchronisation. Previously they would be at opposite ends of the conveyor and this would require multiple banks-man and hand signals.

Rotec’s technical team and engineering team designed and fitted a new control system based around a Parker IQAN mobile specific safety controller which uses CAN Open protocol to safely communicate with a radio remote system.

Existing manually operated valves were exchanged for electronic proportional control, allowing the operator to drive all the hydraulic functions remotely that were previously only available using hydraulic levers locally on the vehicle.

Backup electronic joysticks have been installed locally on the vehicle if the remote control was ever to become damaged during use, eliminating the risk of the vehicle becoming stranded in this rare scenario.

Our customer requested we fitted their own specific blue warning lamps and white noise sounders, all of which are driven directly from the new safety controller.

The existing emergency stop system was removed and replaced with an updated dual channel fail safe circuit featuring safety relays, bringing the equipment up to modern safety standards. Emergency stops include one located on the remote control allowing the operator to stop functions quickly and safely from a distance.

The newly installed Rotec control system integrates with the existing engine controller to allow warning messages to be displayed on the screen located on the remote, providing the operator with ultimate feedback if any engine faults develop during use.

Rotec also installed a Bluetooth modem allowing the customer to make certain parameter changes to the control system using a free app that is available to download.

The app enables any user to view logs, check the health of the system and monitor various sensors all wirelessly from a smartphone or tablet. Additional features include the ability to connect the machine to the internet so Rotec staff can remotely assist, diagnose and install software updates if required. Password protection has been employed to prevent abuse of the system by anyone except personnel issued with the login credentials.

To integrate with the client’s corporate branding, we customised the remote control with the client’s logo. Customisations such as switch positions and labeling were also discussed and agreed with the customer before build to ensure we delivered the best customer service and client satisfaction.

Multi-million pound refurbishment of MS Bolette unveiled

Supported by Rotec’s electrical mechanical services team, a multi-million pound refurbishment of MS Bolette has been unveiled to CLIA and Government officials.

The Bolette entered dry dock for a 13-day refurbishment, including maintenance to the ship’s Azipods and bow thrusters as well a new application of anti-fouling paint. Rotec Hydraulics Ltd, based across the South West of the UK, were responsible for the overhaul of Bolette’s eight thruster fans.

After the fans were electronically and mechanically disconnected, the vessel’s thruster fans were transported by Rotec for a full inspection. Following the inspection of all plate detail and insulation valves, the fans underwent dynamic balancing. The units were then transported back to the shipyard and reconnected, with a full works report supplied to the client.

The turnaround for the project was a mere 8 days from the ship arriving in the UK shipyard to Bolette setting sail again on 7^th March. To ensure the tight deadline was met, Rotec engineers went above and beyond, working a 24/7 split shift pattern. Unplanned and additional emergent works which occurred, were quickly responded to by the Rotec team. Following the works, Mark Terrell, Electrical & Maintenance Manager at A&P Falmouth commented on Rotec’s service delivery:

“I would like to take the opportunity to thank you for the support. The Rotec response was great and by Monday 16:00 (less than 24 hours later) the ship had passed off all 8 fans as complete and ready to return to service. Special mention must go to [your engineers] for sticking with the job through Sunday night and well into Monday!”

MS Bolette has now sailed to Newcastle to complete its spring/summer season operating in Europe. Owned and operated by Fred. Olsen Cruise Lines, Bolette was formerly named Amsterdam and was the last ship of the four Rotterdam class (R class) cruise vessels.

For more information on Rotec’s Electrical Mechanical Services visit www.rotec.net.

Image: Aerial view of A&P Falmouth, where refurbishment of MS Bolette took place. Image source: https://www.cruiseandferry.net/

Rotec Deliver Vessel Overhaul at A&P Falmouth

Rotec’s Electrical Mechanical Services team have recently carried out significant maintenance and overhaul works on the vessel Norbay at A&P Falmouth.

Originally built in Rotterdam in 1994, Norbay and her sister Norbank were two of the first of a new generation of ‘super freighters’. The vessel is currently used as a car, passenger and freight ferry in the Irish Sea for P&O Ferries.

Specialists in alternators and generators, Rotec’s Electrical Mechanical engineers have completed a significant overhaul project on the vessel Norbay, on-site at A&P Falmouth. The work included:

On-site Aft Bow Thrust Overhaul inc. internal inspection, replacement bearings, rebuild, testing and full works report
Port Alternator Clean and Bearing Change
Main Vehicle Deck Aft Cargo Fan Overhaul inc. collection from dockside to Rotec workshop inspection, steam clean, re varnish, new bearings, dynamic balancing, testing and reinstall
Cargo Fans motors overhaul.

The work carried out will ensure the continued performance and availability of the vessel. Greg Sandy, Business Development Manager and part of Rotec’s Electrical mechanical Services team said:

“Rotec are proud of their strong relationship and partnership with A&P Group in Falmouth, which sees us providing quality services and solutions.
“Our extensive range of services and products, combined with the experience and knowledge of our technical team has given us the well-deserved reputation for being a trusted provider of quality Electrical Mechanical Services.”

Rotec have been trading for over 30 years and take pride in delivering project specific solutions, sustainable results and added value to their clients. For more information on our Electrical Mechanical Services offer, click here.

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