Study on equivalent acceleration test method of bearing bench

Accelerated testing using bearing test rigs is a critical method for evaluating bearing durability performance. Equivalent accelerated testing methods can significantly reduce testing cycles and minimize costs. To address the need for efficient durability assessment, this study reviews current equivalent accelerated testing methods for rolling bearings and proposes two novel methods based on the principle of energy conservation. Two novel accelerated testing methods were proposed based on the principle of energy conservation. The operational procedures for these methods were elaborated by integrating damage consistency criteria with experimental results. Additionally, insufficient consideration of energy loss in the proposed methods was addressed, and potential solutions were suggested. The results demonstrated that equivalent accelerated testing could be achieved theoretically through the energy equivalence method, which was grounded in energy consistency and combined with damage consistency criteria. The required parameters were obtained through motor monitoring, oil lubrication inlet/outlet temperature measurements, and external bearing temperature sensors. Damage consistency between accelerated and conventional tests was validated via artificially induced raceway defects and extended single-specimen testing. The difference in energy loss between the driving motor and bearings under conventional and accelerated testing conditions was found to be approximately equivalent, enabling the testing duration to be reduced without compromising reliability.