TPT May 2013

Environment- friendly tech

New technology from SMS Meer saves energy

neither a cooling system nor a central hydraulic station with a large tank. The costs of housings or hydraulic cellars as well as long pipelines are eliminated. All hydraulic components are mounted directly onto or on top of the machine in an easy-to-maintain way. Longer lifetime of the oil also contributes to low repair costs as well as to a small number of wearing parts. Since the components are provided with a modular structure and are thus easily exchangeable this also results in a cost advantage. Integrated control of the pump parameters also allows preventive maintenance. This means that it is noticeable when a component should be replaced in the near future.

technology fulfils the guidelines of the SMS Meer “Ecoplants” systems. Setupisperformedwithoutproportional valve technology and throttling of the hydraulic power typical for conventional systems with corresponding heating of oil being dispensed with completely. As a result, an extremely energy-saving and low-loss hydraulic system can be built up – not only with “small” systems, but also with high pressing forces as with several hydraulic axles. Only the oil pressure and volumetric flow that are actually required by the system are generated. In this respect, the motors only run during the main machine function (eg pressing process), but are idle in the non-productive time. This means less power consumption and lower noise emissions. The structure also enables return feed into the power supply system, for instance from the compression energy of oil. Hydraulic systems with VSP require

ENERGY saving, reduction of emissions and cost reduction are key buying arguments in all sectors of the steel and non-ferrous industry. The hydraulic system also offers great potential here. A new technical solution from SMS Meer provides considerable advantages. Variable-speed pump control, VSP for short, enables an efficient hydraulic system with pressures of more than 450 bar. Two Russian large-diameter pipe producers, Vyksa Steelworks (OMK) and Izhorsky Trubny Zavod (Severstal), will soon be using the VSP technology on two gap closing presses (each with 25-MN pressing force and four pressing cylinders). The general principle: the oil pressure is generated only on system inquiry – that is only if it is actually required. Commercially available axial piston pumps are used, and control is via the speed of the servomotors. With energy efficiency and eco-friendliness, this

SMS Meer GmbH – Germany Fax: +49 2161 350 1862 Email: info@sms-meer.com Website: www.sms-meer.com

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M ay 2013