November/ December 2021

conditions, these included rotational loads up to 2,572 tons – the largest load ever handled by a Push-Pull system, highly accurate control of wheel rim movement, and accommodating the system within limited space constraints. Also, for the first www.excellence-in-actuation.co.uk At ASL, we believe there is a certain way of doing business. It’s not just about offering great service (although we do), it’s about keeping promises, keeping customers informed and treating others as we would wish to be treated. You might say that dealing with ASL is very civilised. Whatever it is, it’s just part of the service. ASL at your service. Civil Service six months of the wheel’s construction the entire load of the part completed wheel would be borne by the Push-Pull system. Accurate control and positioning The wheel segments are welded together as each new segment is added. Ensuring the welding process could be completed smoothly relied on precise positioning of each new segment by the Enerpac Push- Pull system. Using precision hydraulic control, the Push-Pull system was able to bring the wheel rim within a few millimetres of the previous rim, and hold it there, to enable the two segments to be welded together. Once the weld was completed, the Push-Pull system was used to progressively feed the wheel segment through, enabling the next segment to be added. The Push-Pull system is powered and operated by a central hydraulic power unit (HPU). The HPU’s diesel engine, main control panel, safety PLC and tank with hydraulic oil are controlled by PLC and laptop computer. Drive and control In addition to the Push-Pull system, Enerpac is supplying the drive and control system for the ‘Ain Dubai’. The company is a leading supplier of hydraulic drive and control systems for large observation wheels including the London Eye and Las Vegas High Roller. www.enerpac.com The completed ‘Ain Dubai’ the world’s largest and tallest observation wheel, standing at over 250 metres.