| Autor: |
H. WINKELMANN, A. PÖLLINGER, J. BERNARDI, K. WHITMORE, S. SCHWARZ, S. KRENN, S. SEICHTER, M. SCHOEBEL |
| Rok vydání: |
2022 |
| Popis: |
The energy revolution is of highest priority to achieve the climate targets defined in the 2015 Paris Agreement. With the power-to-gas concept, electric energy is stored as hydrogen gas. State-of-the-art reciprocating compressor technology can realize high pressures with high volumetric flow rates for gas supply. The main challenges in designing machines suited for these operating conditions are the high mechanical stresses acting on piston sealing rings. The high shear forces and the need of minimal gap sizes demand material pairings with high wear resistance and excellent sliding properties. Present research investigates the life cycle limiting wear mechanisms present in the piston compressor, to develop advanced concepts for piston rings and cylinder tribocontacts. In detail PI (polyimide) and PPS (polyphenylene sulphide) materials were reinforced with CF (carbon fibre) and PTFE (Polytetrafluoroethylene) to fulfil the demands of this highly stressed tribosystem. The wear mechanisms were analysed utilizing SEM (Scanning Electron Microscopy) on cross sections cut into the depth of the counter surface material with FIB (Focused Ion Beam), to investigate the abrasion and material deposition. 2D STEM (Scanning Transmission Electron Microscopy) mapping supported by EDX (Energy Dispersive X-ray Spectroscopy) were performed to visualize the depth profile of chemical elements on the wear track after tribotesting. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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