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Energy efficiency modeling and validation of a novel swash plate-rotating type hydraulic transformer

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  • Zhou, Junjie
  • Jing, Chongbo
  • Wu, Wei

Abstract

This paper reports a mathematical model and an experimental validation for the efficiency of a new type of hydraulic transformer, which utilizes a new structure of rotating swash plate. Such a type allows the valve plate being fixed without relative movement to the 3 pressure ports, reducing the throttling loss. An efficiency model is derived accounting for the leakage loss, friction loss and churning loss inside the hydraulic transformer. An experimental test rig is built up to validate the theoretical work. It can be seen that the simulated results are consistent with the test data. So the proposed efficiency model is verified to be correct. Results also show that the highest total efficiency of the new type of hydraulic transformer can reach 70%, and the high-efficiency zone of the transformer appears when the transformation ratio is between 0.5 and 1.75, which is evidently larger than the previous designs. The present work indicates the good potentials of the swash plate-rotating type of hydraulic transformer.

Suggested Citation

  • Zhou, Junjie & Jing, Chongbo & Wu, Wei, 2020. "Energy efficiency modeling and validation of a novel swash plate-rotating type hydraulic transformer," Energy, Elsevier, vol. 193(C).
    • Handle: RePEc:eee:energy:v:193:y:2020:i:c:s0360544219323473
    DOI: 10.1016/j.energy.2019.116652
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    References listed on IDEAS

    as
    1. Gaspar, José F. & Calvário, Miguel & Kamarlouei, Mojtaba & Guedes Soares, C., 2016. "Power take-off concept for wave energy converters based on oil-hydraulic transformer units," Renewable Energy, Elsevier, vol. 86(C), pages 1232-1246.
    2. Andrea Vacca, 2018. "Energy Efficiency and Controllability of Fluid Power Systems," Energies, MDPI, vol. 11(5), pages 1-6, May.
    3. Chongbo Jing & Junjie Zhou & Shihua Yuan & Siyuan Zhao, 2018. "Research on the Pressure Ratio Characteristics of a Swash Plate-Rotating Hydraulic Transformer," Energies, MDPI, vol. 11(6), pages 1-11, June.
    4. Wu, Wei & Hu, Jibin & Yuan, Shihua & Di, Chongfeng, 2016. "A hydraulic hybrid propulsion method for automobiles with self-adaptive system," Energy, Elsevier, vol. 114(C), pages 683-692.
    5. Wu, Wei & Hu, Jibin & Jing, Chongbo & Jiang, Zhonglin & Yuan, Shihua, 2014. "Investigation of energy efficient hydraulic hybrid propulsion system for automobiles," Energy, Elsevier, vol. 73(C), pages 497-505.
    6. Kwon, Hyukjoon & Sprengel, Michael & Ivantysynova, Monika, 2016. "Thermal modeling of a hydraulic hybrid vehicle transmission based on thermodynamic analysis," Energy, Elsevier, vol. 116(P1), pages 650-660.
    7. Zhou, Junjie & Wei, Chao & Hu, Jibin, 2015. "A novel approach for predicting thermal effects of gas cavitation in hydraulic circuits," Energy, Elsevier, vol. 83(C), pages 576-582.
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    Cited by:

    1. Wang, He & Chen, Zhen & Huang, Jiahai, 2021. "Improvement of vibration frequency and energy efficiency in the uniaxial electro-hydraulic shaking tables for sinusoidal vibration waveform," Energy, Elsevier, vol. 218(C).
    2. Bao, Qianqian & Zhou, Junjie & Jing, Chongbo & Zhao, Huipeng & Wu, Yi & Zhang, Zhu, 2022. "Nonlinear dynamic model for the free rotor of the swash plate-rotating hydraulic transformer," Energy, Elsevier, vol. 261(PB).

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