压裂泵阀箱自增强技术仿真研究

何霞; 赵敏; 陈林燕; 李蓉

压裂泵阀箱自增强技术仿真研究

1.
1. 西南石油大学机电工程学院, 成都 610500;
2.
中国石油天然气集团公司长城钻探工程技术研究院, 盘锦 124010;
3.
中石化江汉石油管理局第四石油机械厂, 荆州 434024

基金项目:

十二五”国家油气重大专项项目(2011ZX05048-04HZ)、国家自然科学基金项目(50905149)资助.

详细信息

作者简介:
何霞(1976-),讲师,研究方向为CAD/CAE和机电一体化等,12829610@qq.com

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- 被引次数: 0
出版历程
- 收稿日期: 2012-08-05
- 刊出日期: 2015-06-10

Fatigue Life Analysis for Fluid Cylinder Based on Autofrettage Technology

1.
Mechanical and Electrical Engineering, Southwest Petroleum Universit, Chengdu 610500;
2.
Great Wall Engineering Research Institute of China National Petroleum Corporation, Panjin 124010;
3.
SJ Petroleum Machinery Co. Jianghan Petroleum Administration Bureau, Jingzhou 434024

摘要

摘要: 基于弹塑性自增强理论, 对压裂泵阀箱进行了弹塑性有限元非线性研究, 探讨了自增强技术和机械加工精度对阀箱疲劳寿命的影响。分析了不同自增强压力下的阀箱应力, 确定了阀箱内腔相贯线处最佳自增强压力为420.6 MPa。对自增强前后阀箱的疲劳寿命进行预测结果表明:阀箱疲劳薄弱区位于内腔相贯线处, 自增强后疲劳薄弱区向壁间转移, 偏离了疲劳危险区域, 阀箱内壁表面材料得到有效保护。自增强技术使阀箱应力峰值降低了30.61%, 最低疲劳寿命提高了6.97倍。自增强技术与提高阀箱内腔表面加工精度的方法相比, 前者对延长阀箱疲劳寿命效果更佳。
- 压裂泵阀箱 /
- 自增强技术 /
- 疲劳寿命 /
- 加工精度
Abstract: Based on autofrettage technology of elastic plastic theory, the stress distribution of fracturing fluid cylinder was obtained by the elastic plastic nonlinear finite element analysis for a domestic fracturing pump, which was employed to research how to improve fatigue life of the fluid cylinder by using autofrettage technology or improving machining accuracy. Through comparing the maximum stress under different autofrettage pressure levels，the best auto-frettage pressure level of fluid cylinder's intracavity intersection was determined as 420.6 MPa. According to S-N design criteria, a prediction life of fluid cylinder could be conducted by using Msc. Fatigue code. Results indicated that the fatigue regions of autofrettage fluid cylinder had been transferred to inner places and had been deviated from the fatigue danger zone, namely intracavity intersection. The intracavity intersection was effectively protected, and the stress peaks of the fluid cylinder reduced by 30.61% and its minimum fatigue life increased by 6.97 times after autofrettage. Compared with improving machining accuracy, the autofrettage technology can increase the fluid cylinders life much more effectively.
- computer simulation /
- efficiency /
- fatigue of materials /
- finite element method

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参考文献(10)

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