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Study on Modeling and Degradation Law of Transmission Efficiency for Harmonic Reducer

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Abstract

Harmonic reducer is widely used in robot and aerospace fields. Transmission efficiency is one of the important indexes to characterize its transmission performance. The transmission efficiency evaluation model of double wave cam harmonic reducer with thin wall bearing is established, and the influence and sensitivity of ambient temperature, rotational speed, load, and reduction ratio on transmission efficiency are discussed. The law of decline of transmission efficiency of harmonic drive is studied, and it is pointed out that harmonic drive has failed when the performance index of transmission efficiency drops below the threshold value, and a failure evaluation model based on transmission efficiency degradation is established. The validity of the efficiency evaluation model was verified by comparing the numerical simulation results with the experimental results. The results provide a theoretical basis for slowing down the decline rate of transmission efficiency and guiding the design of long-life harmonic reducer.

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Acknowledgements

The authors would like to acknowledge the financial support from the NSFC, the research is funded by National Natural Science Foundation of China (contract No. 51775036); these supports are gracefully acknowledged.

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  1. School of Mechanical Engineering, University of Science and Technology Beijing, Haidian District, Beijing, China

    Wei Li & Luzhe Chen

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  1. Wei Li
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  2. Luzhe Chen
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Correspondence to Wei Li.

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Li, W., Chen, L. Study on Modeling and Degradation Law of Transmission Efficiency for Harmonic Reducer. J Fail. Anal. and Preven. 22, 1943–1953 (2022). https://doi.org/10.1007/s11668-022-01482-x

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  • DOI: https://doi.org/10.1007/s11668-022-01482-x

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