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INFRARED THERMOGRAPHY - A NON-POLLUTING METHOD FOR ASSESSING WEAR / FUNCTIONALITY FOR VOLUMETRIC MACHINES IN HYDRAULIC DRIVE SYSTEMS
Abstract
The ?20-20-20? program provides a 20% reduction in greenhouse gas emissions (CO2 equivalent) compared to 1990, ie a 20% reduction of the final energy consumption compared to 2005, by increasing of the energy efficiency and increasing the share of renewable sources in the total energy mix to at least 20% until 2020. Starting from this European directive, the authors propose to develop a method of assessing the wear and operating status of hydraulic pumps, rotary hydraulic motors and hydraulic cylinders, without necessity to remove them from the hydraulic drive systems they belong for testing them on high-energy laboratory stands. To achieve of the proposed goal of expanding the infrared thermography in the field of hydraulic drive systems, three directions of action are addressed: the infrared thermography of the main families of volumetric machines (pumps, rotary motors and hydraulic cylinders) without wear; making thermograms of the same volumetric machines with different degrees of wear; comparative analysis of the two sets of thermograms. The authors have developed an incipient data base, which they intend to develop in the future, containing the witness thermograms of the non-worn volumetric machines, made on laboratory-stands, respectively the thermograms of the volumetric machines with different wear degrees, resulting from the simulation on the stands of some causative wear operating modes. It is intended to develop this database by: raising of the volumetric machine manufacturers' in the direction of inclusion the standard thermograms in their product catalogs; raising the beneficiaries of hydraulically operated machinery and equipments in the direction of periodic control, by making thermograms of the volumetric machines operating state from those drive systems. The authors express their opinion that by attracting of the two mentioned factors and by developing of some interpretation methods / comparative analysis "standard thermogram" vs. "real thermogram", the infrared thermography method may have a in the field of hydraulic drive systems, a similar success to that from medicine (the human body is a much more complex system than a hydraulic drive system)
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