Fraunhofer Institute for Surface Engineering and Thin Films IST
Digital 3D microscopy provides vivid representations of characteristic wear phenomena. Here: furrowing on the slide valve of a rotary compressor caused by particles.
Wear analysis as the basis for the optimization of tribological systems using heat pumps as an example
Reliable identification of wear characteristics with derivation of the causes
Mechanically stressed components are subject to a natural wear process. The consequences in terms of the extent and severity of this wear can be decisive for the efficiency and operation of a device such as a compressor in a heat pump. Our versatile preparation and analysis methods enable a comprehensive wear analysis. The causes and consequences of wear can thereby be precisely identified and evaluated. Through the meticulous examination of the wear phenomena, we are able to provide recommendations regarding the optimization of the performance capabilities and service life of the components.
Secure identification of improvement potential for a longer service life and increased reliability
Higher power consumption, lower compression and oil surge are undesirable consequences of wear in heat-pump compressors. The correct design, the utilization of the optimum material and, where appropriate, a suitable surface treatment can reduce the negative effects mentioned and extend the product service life. Our comprehensive wear analysis allows you to efficiently optimize your products. Together, we identify effective improvement measures. You and your customers benefit from your quality product.
Our experts would be delighted to answer your questions and to find individual solutions for your specific requirements.
Wear analysis using the example of a rotating piston compressor for heat pumps
Rotary pistons and gate valves in rotary compressors are exposed to considerable tribological loads on their contact surface.
Worn drive-shaft bearing from a rotary compressor.
Microscopy and 3D imaging
Wear analysis: The identification of characteristic wear traits such as plastic deformation, cracking and tribocorrosion is possible with a trained eye by means of light microscopy.
Digital 3D microscopy creates clear images of characteristic wear phenomena. Shown here: a groove caused by particles on the gate valve of a rotary compressor.
The failure of component coatings can also be easily visualized by means of light microscopy within the scope of a wear analysis.
Hardness-depth profile, X-ray fluorescence spectroscopy (XRF) and metallography
The hardness-depth profile reveals important mechanical properties of the components involved.
The composition of materials and adhesions can be determined by means of, for example, X-ray fluorescence spectroscopy (XRF).
Metallography provides important information on the microstructure of the utilized materials.