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Driving shaft fatigue optimization design of Ω type profile twin-screw pumps

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Abstract

Under changeable pumped medium and working environment, the twin-screw pump is prone to be broken by fatigue failures. A structure optimization design model and method of the driving shaft are presented based on response surface methodology and finite element analysis. In this model, the shaft diameter, chamfering degree and the shaft extension of the power end are selected as optimization variables, the limit values of the variables and maximal normal deformation of the spindle are considered as the constraint conditions, and the minimization of the equivalent alternating stress on the dangerous shaft section is taken as the optimization objective so as to improve the shaft fatigue reliability. The optimization results of a case show that the equivalent alternating stress on the dangerous spindle section reduces by 26.2 %, and the maximal normal deformation decreases by 25.2 % compared with the original design. In addition, the infinite life reliability and fatigue safety factors both meet the design requirements.

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Authors and Affiliations

  1. Naval Architecture & Ocean Engineering College, Dalian Maritime University, Dalian, Liaoning, 116026, China

    Zhi-Jie Liu & Yu-Chong Zhao

  2. Tianjin Pumps & Machinery Group Co., Tianjin, 300499, China

    Zhi-Qiang Gan

  3. Hisense Electric Co., LTD, Qingdao, Shandong, 266555, China

    Dong-Lin Hui

Authors
  1. Zhi-Jie Liu
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  2. Yu-Chong Zhao
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  3. Zhi-Qiang Gan
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  4. Dong-Lin Hui
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Corresponding author

Correspondence to Zhi-Jie Liu.

Additional information

This paper was presented at ICMR 2017 & QR2MSE 2017, Crowne Plaza Chengdu West, Chengdu, China, October 24–27, 2017. Recommended by Guest Editor Dong Ho Bae.

Zhi-Jie Liu is a Associate Professor of Naval Architecture & Ocean Engineering College, at Dalian Maritime University. He received a Ph.D. degree in Mechanical Design and Theory from Dalian University of Science and Technology, China and has published over 40 papers in fields of reliability engineering, optimization design, and ocean equipment development.

Yu-Chong Zhao is currently a postgraduate student in Mechanical Engineering at Dalian Maritime University. He received his bachelor degree in Mechanical Design, Manufacturing, and Automation from Hunan University in 2016. His research mainly includes reliability design.

Zhi-qiang Gan is currently a Senior Engineer of Tianjin Pumps & Machinery Group Co., P.R. China. He received his master degree in fluid mechanical engineering from Tsinghua University. He has more than ten years’ experience in the fields of fluid mechanical design and failure diagnostic. He has published more than ten journal papers in these fields.

Dong-Lin Hui is currently a Process Engineer in Hisense Electric CO., LTD. He received his bachelor's degree in process equipment and control engineering from Shandong University and master degree in mechanical engineering from Dalian Maritime University. His research interests include fatigue life analysis and fatigue reliability design.

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Liu, ZJ., Zhao, YC., Gan, ZQ. et al. Driving shaft fatigue optimization design of Ω type profile twin-screw pumps. J Mech Sci Technol 32, 5089–5096 (2018). https://doi.org/10.1007/s12206-018-1005-z

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  • DOI: https://doi.org/10.1007/s12206-018-1005-z

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