Condition monitoring reveals complex bearing behavior in bleaching press

Using Intellinova Parallel EN for condition monitoring with SPM HD and HD ENV, a large pulp producer in Chile identified complex bearing behavior in a low-speed, production-critical bleaching press. The HD technologies revealed a BPFO pattern with sidebands at FTF that conventional vibration analysis did not detect, enabling early diagnosis and a planned intervention.

Application and monitoring setup

The application involved a twin-roll bleaching press at Chile’s largest pulp producer, operating with low-speed, production-critical bearings. For focused diagnostics, a portable Intellinova Parallel EN system was used to continuously monitor machine condition for 24 hours. The setup included four DuoTech accelerometers, two tachometers, and remote connectivity. Measurements were evaluated using SPM HD, HD ENV, and time and frequency analysis.

Results and benefits

The condition monitoring system identified a complex bearing signature characterized by BPFO with sidebands at FTF, linked to high internal bearing clearance. This behavior was not visible using conventional vibration tools. The insight enabled collaboration with the bearing manufacturer, a planned bearing replacement, and verification through physical inspection. As a result, the customer avoided the risk of an unplanned production stop in a highly critical .