Rotec supports new immersive visitor experience at the Fleet Air Arm Museum

The Fleet Air Arm Museum will be wowing visitors with their new state-of-the-art, immersive Carrier Experience after a £1million refurbishment.

Rotec Hydraulics Ltd were pleased to carry out works on the hydraulic and electrical systems that are integral to the simulator experience at the museum, which houses aircraft and artefacts from the flying arm of the Royal Navy.

In addition to replacing over 50m of hydraulic hose, all hoses were uniquely identified using the Parker Hannifin PTS bar-code labelling system to ease traceability and future renewal. Rotec engineers also refurbished all hydraulic cylinders and repaired the two hydraulic pump units to ensure pressure and flow performance are maximised. Other works included replacement seals, filters and directional valves, strip and clean manifold assemblies and reservoir cleans.

Adjacent to the hydraulic works, Rotec carried out electrical works on the customer experience feature at the museum in the main pump room, remote control room and on the scissor lift which raises and lowers visitors during the simulation.

In the main pump room located control panel, Rotec removed existing obsolete Toshiba PLC unit hardware, and installed a newly supplied 24VDC 10A switch mode power supply module plus protective devices. A rewire the existing safety monitoring control relay and circuit was required to provide a dual channel redundant protective emergency stop circuit.

Rotec designed, supplied and installed replacement PLC hardware to replace the Toshiba module, which was then fully programmed with the required application specific logic code to ensure the scissor lift would rise and lower in time with the attraction’s audio-visual experience.

In the remote control room, Rotec supplied and installed an operator’s control station and local 24VDC power supply. The control station included a nominal 8” full colour touchscreen HMI device fully programmed with all existing and planned operator controls, indicators and alarms.

The works Rotec has completed in part of an overarching Carrier Experience. The new experience, which is dedicated to the memory of generous benefactor Vice Admiral Sir Donald Gosling KCVO, Vice Admiral of The United Kingdom, combines digital technology with the scale of a carrier flight deck to transport visitors from the pioneer years of the First World War, all the way to the modern HMS Queen Elizabeth class carriers of today.

Adam Gosling, of the Gosling Foundation comments,

“Vice Admiral Sir Donald Gosling KCVO, Vice Admiral of The United Kingdom founded the original Carrier Experience that opened in 1994 and has welcomed over four million visitors.

 

“To see the Experience reinvigorated and made meaningful and relevant for today’s audience is the perfect way to celebrate my late father’s enduring support of the Fleet Air Arm Museum. It reflects a mutual vision to preserve and showcase the proud history of British naval aviation. His generous legacy gift has enabled, once again, the illustrious tale of Britain’s aircraft carriers to be told, and enjoyed, for many more generations to come.”

Professor Dominic Tweddle, Director General of The National Museum of the Royal Navy says,

“The re-imagining of the Carrier Experience to include the Queen Elizabeth Class, the pride of the British fleet, demonstrates our ongoing commitment to the history of naval aviation and telling the story of the contemporary navy. This mix of heritage and modernity mirrors the projects that Vice Admiral Sir Donald Gosling KCVO, Vice Admiral of the United Kingdom so generously supported over the years.

 

“I am certain that the work of the staff team, contractors and corporate partner Lockheed Martin has brought to life the Carrier story in the way that Sir Donald had in mind when he made his legacy gift.  It is both an honour and a pleasure to recognise his lifelong support with this exhibition, which is housed in The Gosling Hall.”

Rotec were chosen to complete the works due to their impressive ability to combine hydraulics with complex electronic control systems. The works were completed in a matter of weeks, on schedule and to a high standard.

For further information on the expansive range of services Rotec offers, including case studies of other works, visit www.rotec.net.

Rotec deliver custom upgrade and HPU builds for leading manufacturer

Recently designed and manufactured, engineers at Rotec Hydraulics Ltd have completed a bespoke project for a market-leading manufacturer.

The British-based company specialise in the manufacture of electronic valve actuators for large fluid flow applications, for example within the oil and gas, water and power industries. The actuators produced are a considerable size and as such, part of the development process includes dynamic load testing. The actuators connect to a test cylinder via a screw thread; as the actuators move the screw thread up and down, this in turn pushes and pulls a hydraulic cylinder.

 Full of hydraulic fluid, the operators were manually operating needle valves to restrict the flow of the hydraulic fluid within the cylinders in order to vary the amount of load on the actuator. Thus, Rotec design engineers developed two key upgrades to this current setup which were:

  • Electrify the load control valves so they can be operated by a computer.
  • Create a power pack which can induce a given pressure inside the test cylinder bores.

 The newly custom-designed system reuses the current cylinders that vary in size from 63mm in diameter to 203mm. To accommodate for this, different sized stands with varying tank sizes have been manufactured to accommodate the extra capacity whilst the control components remain the same. The stands consist of:

  • A custom powder coated steel frame.
  • An aluminium reservoir.
  • Dual electronic proportional pressure relief valves.
  • Dual manual needle valves.
  • Dual ball valves.
  • Quick connect ports for the power pack to connect to.
  • Output ports which connect to the test cylinder.

In addition to this, Rotec developed and built three identical standalone hydraulic power unit (HPU) systems which can create steady state pressures inside the test cylinders bores to eradicate erroneous pressure lag errors. Features include:

  • Powder coated mild steel tank construction.
  • 3 phase motor coupled to a gear pump.
  • Air blast oil cooler.
  • Direction control valve.
  • Dual proportional relief valve.
  • Electronic control box.
  • Stainless steel tool tray.
  • Whole unit is mounted on castors for easy manoeuvrability.

For more information on Rotec’s capabilities, including project case studies, visit www.rotec.net.

Stroud Engineers Deliver Major Refurbishment Projects at BMW

Rotec engineers carried out a major refurbishment of the Feed Line and Press at a BMW plant in Gloucestershire.

Over 160 hydraulic hoses on the Feed Line, and 66 hoses on the Major Press were removed and new hoses made and fitted.

This was a challenging job due to the complexity of the machinery and included hoses on the Feed Line HPU (hydraulic power unit), Press and Overload/Protection/Lubrication HPUs. Feed Line Pneumatic cylinders, valves and tubings were also supplied and fitted, in addtion to a total of 48 existing hydraulic cylinders on the Feed Line removed and new cylinders fitted.

Further work taken on the Feed Line, Press and Overload/Protection/Lubrication HPUs included:

  • Draining of the working fluid and cleaning of the reservoir.
  • Replacement of pressure and return hydraulic filters, pressure and return.
  • Replacement of pressure and return hydraulic filters, pressure and return.
  • Resealing of duplex filter block.
  • Removal of existing and refitting of new motor pump sets.
  • Thorough cleaning and inspection.
  • Removal of existing and refitting of new air blast coolers.

All refurbishment works were carried out on time, in budget and to the client’s expectations and standards.

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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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How to prevent hydraulic oil overheating

Overheating is the second most common issue that occurs in hydraulic systems, behind leakages. Overheating of hydraulic systems is caused by inefficiencies which have resulted in loss of input power being converted to heat. To achieve stable fluid temperature, a hydraulic system’s capacity to dissipate heat must exceed its heat load. Overheating can be avoided by a reduction in hydraulic oil heat load and/or increasing heat dissipation.

Why reduce oil temperature?

Hydraulic fluid temperatures above 82°C (180°F) is likely to lead to oil degradation and cause damage to hydraulic seal compounds. While the operation of any hydraulic system at temperatures above 82°C should be avoided, fluid temperature is too high when viscosity falls below the optimum value for the hydraulic system’s components. This can occur well below 82°C, depending on the fluid’s viscosity grade (weight). To achieve a stable oil temperature, the hydraulic system must be able to dissipate heat faster than it is built up.

Heat dissipation

Heat dissipation occurs in the hydraulic reservoir. Regularly check there are no obstructions to the air flow into the reservoir and that fluid levels are correct.

Heat exchangers

Similarly to the reservoir checks, ensure the core of heat exchangers are not obstructed. Heat exchangers rely on flow-rate, hydraulic oil temperature and coolant in order to disperse heat suitably. It is vital that faulty cooling circuits are replaced. Infra-red thermometers are a reliable way to measure the performance and oil flow rate of heat exchangers.

Oil pressure and leakage

Reduction in system pressure or oil leakage will cause increased heat generation. It is critical that the cause of the leaking is identified and then rectified appropriately. If a relief valve is underneath or positioned too closely to the pressure setting of a pressure-compensator in a closed-centre circuit, it may lead to increased heat generation and the system pressure cannot reach the pressure compensator setting. Subsequently, the component will continue to move oil thorough the system, passing over the relief valve, which produces heat.

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Grain ship-loader replacement electro-hydraulic control system

Thanks to the working relationship spanning many years, Rotec were invited to quote for the replacement of the hydraulic power unit and controls of the grain/feed products ship loader travelling gantry system. The client was faced with reliability and obsolescence issues with the original equipment dating back to the 1980s. It is the only plant capable of this function at the port and is in use constantly.

The ship loader hydraulic functions consist of a dual pumping system and associated hydraulic equipment built into an up-cycled twenty-foot shipping container. The container sits on the machine approximately 20 metres above dock level, which presented some unique access issues.

 Based on the original system design, Rotec designed and manufactured a complete self-contained hydraulic system and associated dedicated electrical control panels which control vertical and horizontal movements of the grain conveyors and loading chute to align over the vessel’s holds as required.

The container was specially modified to accept and fit the hydraulic system. This included full sound and fireproofing, internal full bunding and bespoke flooring and ventilation integration. The hydraulic system consists of a primary pump system driven by a 100KW 3300VAC electric motor and proportionally controlled variable displacement pump with a completely redundant secondary backup system in case of partial or total power loss. This 400VAC backup system is supplied from an external generator and is used to recover the chute off a vessel during a power loss when necessary. The main pump systems are supported by cooling and filtration systems and associated electrical control and monitoring equipment which in turn all interface and interlock to the main ship loader external control system.

21The project initially began in 2017, but project was temporarily halted by Brexit and later on, the outbreak of COVID-19. However, following a major fire one evening whilst in use on a vessel which completely destroyed the old containerised system, surrounding cabling and pipework, the project objectives and target completion date was rapidly brought forward to minimize the client’s downtime.

Due to our very flexible approach and ability to respond to an everchanging priorities list, Rotec was able to pick up and resume the build process quickly and managed to complete and factory test the unit ready for site delivery and install by the end of May. Our on-site engineers in the meantime stripped out and replaced large quantities of fire damaged external fixed stainless and special alloy tubing and replaced all external flexible hoses on the machine. The container unit and system were craned into place, pipework connections completed then flushed thoroughly. The system has now finished its commissioning and setting to work process, on time and on budget, and is ready to serve the port for this vital service for at least another 30 years minimum. The client is completely satisfied with the product and service received by him by our team of design, manufacturing, and field service personnel.