Optimization Research on the Performance of the RC-DTH Air Hammer Based on Computational Fluid Dynamics

Optimization Research on the Performance of the RC-DTH Air Hammer Based on Computational Fluid Dynamics

To optimize the performance of the RC-DTH air hammer, a mathematical model detailing each phase of the piston’s movement has been constructed in the present work. Simultaneously, a novel piston structure of the RC-DTH air hammer (Type B) with diverse internal flow has been proposed. The impact perfo...

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Bibliographic Details
Main Authors: Zihao Liu, Yongjiang Luo, Wenchao He, Rui Tao, Jiangfu He, Yongliang Sun, Hongwei Chen, Qianting Hu
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Applied Sciences
Subjects:
RC-DTH air hammer
continuous sampling
CFD
impact performance
stroke
Online Access:https://www.mdpi.com/2076-3417/15/2/740
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Summary:To optimize the performance of the RC-DTH air hammer, a mathematical model detailing each phase of the piston’s movement has been constructed in the present work. Simultaneously, a novel piston structure of the RC-DTH air hammer (Type B) with diverse internal flow has been proposed. The impact performance of the structurally modified RC-DTH hammer is analyzed using Computational Fluid Dynamics (CFD). Additionally, an impact energy testing system for the RC-DTH air hammer is developed to confirm the validity of the numerical simulation results. Research results have shown that enhancing both the intake stroke of the upper chamber (<i>F</i><sub>1</sub>) and the outlet stroke of the lower chamber (<i>R</i><sub>2</sub>) of the RC-DTH air hammer piston can effectively improve the piston’s impact performance. Conversely, increasing the inlet stroke of the lower chamber (<i>R</i><sub>1</sub>) and the outlet stroke of the upper chamber (<i>F</i><sub>2</sub>) tends to diminish the piston’s impact performance. Moreover, the quality of the piston influences its striking frequency while having a minimal impact on single-impact energy. As the piston quality increases, the power of the impact diminishes. Once the piston valve stroke parameters are optimized, its impact performance is enhanced by 20.32%. Compared to the GQ89 hammer, the Type B hammer exhibits an 84% increase in impact energy and a 74% increase in impact power.
ISSN:2076-3417

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