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Study on the Use of Digital Hydraulics in P

In the energy efficiency era, modern industry machinery demand now more than ever intelligent and efficient electronic control modules, in order to gradually increase their technical performances. Classic hydraulic driven machinery are complex and reliable but trying to reconfigure their schematic is a very hard to do process, in some cases impossible. Machine flexibility and energy efficiency are probably two of the most important concepts that govern the world of equipment – installation – machine design engineers. Solving this sort of demands certainly leads to a rapid increase in electronic control system complexity and designing new electro-hydraulic equipment that use modern concepts such as digital hydraulics. Nevertheless, complex electronic modules require adequate software development [1]. Referring to a narrower case, hydraulic P.E.T. waste presses, they are well acquainted for their productivity versus low cost classic hydraulics installation. Still, there remains another issue that needs to be taken into account: energy efficiency. In this paper, the authors have investigated the possibility of using the digital hydraulics concept in replacing classic electrohydraulic directional valves of a small capacity P.E.T. waste press from the energy consumption point of view. Also, there will be discussed main advantages and disadvantages of using digital hydraulics over classic hydraulics in the particular case of a P.E.T. waste press.