Sensor-integrated machine element radial shaft seal for monitoring of operation conditions and lubricant quality

• Applicants: Professor Dr.-Ing. Jörg Seewig; Professor Dr.-Ing. Stefan Thielen; Professor Dr.-Ing. Norbert Wehn
• Subject Area: Engineering Design, Machine Elements, Product Development
• Term: since 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 466192751

The development of a sensor-integrating radial shaft seal (SiME-RWDR) evaluating its own operational condition as well as the quality of the lubricant could offer considerable opportunities for future monitoring oil-lubricated machines. In line with this overall objective, concepts for the in-situ determination of ambient conditions (pressure and temperature inside the machine), crucial operational parameters of the seal (contact friction and temperature) as well as ageing or contamination of the lubricant was developed within the scope of SPP 2305 leading up to an initial proof of function. The sensor components required are integrated into a conventional radial shaft seal in an installation space-neutral manner and without impairing the sealing mechanisms to a critical extent. They can furthermore be driven wirelessly from outside the machine by a dedicated electronic system. Based on the knowledge obtained, the SiME-RWDR will be finalized in the following period. Eventually, it will be implementable in any mechatronic environment. Therefore, the existing system concepts and measurement methods are prepared for application under realistic operational conditions. Subsequently, these are consolidated into an autonomously operating integrated system, which is subjected to an in-depth sensitivity analysis as well as a general preparation for information technological connectivity. The following period focusses on an experimental evaluation of the SiME-RWDR. This involves demonstrating the functional reliability of the integrated sensor system within the full range of application boundaries defined by the seal manufacturer. As part of inter-project cooperations with several research institutes, an interlinking of various sensor-integrating machine elements based on the established OPC UA standard is also being trialed. The documentation of all methods developed and lessons learned during both funding periods into a framework will result in a comprehensive guide including development as well as application of SiME-RWDR.

• DFG Programme: Priority Programmes
• Subproject of: SPP 2305: Sensor-Integrated Machine Elements pave the way for Widespread Digitalization
• Co-Investigator: Professor Dr.-Ing. Oliver Koch