活塞结构参数分析优化
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1.长江大学机械工程学院;2.非常规油气湖北省协同创新中心;3.中石化中原石油工程有限公司井下特种作业公司,河南濮阳,

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TH138

基金项目:

“湖北省油气钻完井工具工程技术研究中心创新平台建设”(2017ZYYD006);’研究生工程创新实践能力培养模式的研究与实践”(项目编号:YJY2019024);“一种新型气动潜孔冲击器”(2019153)


Analysis and optimization of piston structure parameters
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Affiliation:

.School of Mechanical Engineering, Yangtze University, Jingzhou, Hubei

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    摘要:

    针对潜孔冲击器活塞断裂失效问题,基于冲击器的工作原理,运用能量守恒定律、理想气体状态、定常流动能量方程建立活塞运动数学模型与活塞结构参数的函数关系,以计算得到的活塞运动速度作为边界条件之一,利用有限元方法进一步分析活塞冲击钎头过程中活塞动力响应,且活塞最大应力位置与现场活塞断裂位置吻合。本文研究了不同活塞前端面长度、活塞前端直径以及活塞中心孔径对冲击器性能参数的影响。活塞前端面直径增大时,冲击功线性降低,活塞应力幅值减低,活塞前端面长度增大时,冲击功降低,活塞应力幅值减低,活塞前端面孔径减小时,冲击功降低,活塞应力呈线性降低。本文根据上述分析结果,对活塞原有结构进行优化,优化后的活塞相较于原模型应力降低了10.2%。

    Abstract:

    4.Down Hole Service Company Sinopec Zhongyuan Petroleum Engineering Ltd, puyang Henan, 457164, China)#$NL:Aiming at the problem of piston failure of down-the-hole (DTH) hammer, based on the working principle of the DTH hammer, the mathematical relationship between the mathematical model of piston motion and the structural parameters of piston was established by using the law of conservation of energy, ideal gas state, and steady flow energy equation. Taking the calculated piston motion velocity as one of the boundary conditions, the finite element method is used to further analyze the piston dynamic response in the process of piston bit percussion. Moreover, the position of the maximum stress of piston coincides with the on-site piston fracture position. In this paper, the effects of different piston front surface lengths, piston front diameters, and piston center bore diameters on the impactor performance parameters were studied. When the diameter of piston front face increases, the impact energy decreases linearly and the stress amplitude of piston decreases. When the length of piston front face increases, the impact energy decreases and the stress amplitude of piston decreases. When the diameter of the front face of piston decreases, the impact energy decreases and the piston stress decreases linearly. Based on the above analysis results, the original structure of the piston was optimized, and the stress of the optimized piston was reduced by 10.2% compared with the original model.

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王健刚,赵钰,杜成,等. 活塞结构参数分析优化[J]. 科学技术与工程, , ():

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  • 收稿日期:2020-07-10
  • 最后修改日期:2020-12-10
  • 录用日期:2020-12-11
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