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Multi-condition analysis and optimization of crankshaft of five-opposed plunger pump

Published:2024-09-26 author:YI Zuyao, WEI Xiuting, LI Zhiqin, et al. Browse: 514 Check PDF documents

Multi-condition analysis and optimization of crankshaft

of five-opposed plunger pump

YI Zuyao, WEI Xiuting, LI Zhiqin, YU Yuelong, WANG Wenying, MA Ze

(School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China)

Abstract: Aiming at the failure and resonance of crankshaft under actual working conditions, taking the crankshaft of five-opposed plunger pump as an example, the theoretical analysis, simulation analysis, structural optimization and strength check of crankshaft under multiple working conditions were studied. Firstly, the ANSYS finite element analysis method was used to study the stress-strain nephogram and modal response nephogram of the crankshaft of 5DW150/16 opposed plunger pump under multiple working conditions, and the dangerous section and resonance problem of the crankshaft under different working conditions were analyzed. Then, the support structure optimization and response surface method optimization was used to study the influence of support mode and structural parameters on the stress and strain of crankshaft. Finally, the theoretical formula strength check was used to study whether the crankshaft before and after optimization meets the design requirements. The research results show that the dangerous section of the crankshaft of the five-throw two-support structure appears at the transition fillet of the crank pin, and there is no resonance phenomenon. The full support structure can enhance the impact resistance of the crankshaft, reduce the vibration of the crankshaft, improve the overall load capacity, and ensure the smooth operation of the pump. The maximum equivalent stress of the crankshaft optimized by the response surface method is reduced by 15.8%, and the maximum deformation is reduced by 14.04%. The crankshaft before and after optimization meets the strength requirements.

Key words: fiveopposed plunger pump; crankshaft; maximum equivalent stress; modal analysis; supporting structure; response surface method analysis; fatigue strength check

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