鲁飞,陈正文,韦志超,王振刚,梁勇,乔建勋
LU Fei,CHEN Zhengwen,WEI Zhichao,WANG Zhengang,LIANG Yong,QIAO Jianxun

• 1:合肥通用机械研究院有限公司通用机械复合材料技术安徽省重点实验室
• 2:南通中远海运船务工程有限公司
• 3:宝鸡石油机械有限责任公司泵业分公司

摘要(Abstract)：

针对超高压泵承压件的开裂问题，对承压件的组成、疲劳裂纹产生和扩展的机理进行了分析，通过循环载荷特性分析及影响疲劳寿命的主要因素研究，得出影响承压件的疲劳寿命的两大因素为疲劳强度和承压件内壁受到的交变应力的结论，并进一步提出解决承压件开裂问题及提高寿命的两个关键技术途径为提高材料的疲劳强度和降低承压件内壁的应力水平。对采用改进设计的承压件的超高压泵在280 MPa压力下进行寿命考核试验，承压件寿命从50 h左右提高到250 h以上，提高了4倍。试验结果验证了提高承压件寿命的理论和方法的有效性。该方法可以在类似的超高压设备的设计中得到应用。
For the cracking failure problem of pressure parts of ultra-high pressure pump，the composition of pressure parts，the mechanism of fatigue crack generation and propagation were analyzed.Through the analysis of cyclic load characteristics and the study of main factors affecting fatigue life，it is concluded that the fatigue strength and the alternating stress on the inner wall of pressure parts are the two main factors influencing the fatigue life of pressure parts，and the solution is further proposed.The two key ways to solve the cracking problem of pressure parts and improve the service life are to improve the fatigue strength of materials and reduce the stress level of the inner wall of pressure parts.The life test of the ultra-high pressure pump with the improved bearing parts was carried out under 280 MPa pressure，and the life of the pressure parts increased from about 50 hours to more than 250 hours，an increase by 4 times.The test results verified the validity of the theory and method proposed by the author to improve the life of pressure parts.This method can be used in the design of similar ultra-high pressure equipment.

关键词(KeyWords)： 超高压泵;往复泵;承压件;开裂失效;疲劳强度;寿命
ultrahigh pressure pump;reciprocating pump;pressure parts;cracking failure;fatigue strength;service life

Abstract:

Keywords:

基金项目(Foundation): 工信部高技术船舶科研项目(MC-202031-Z07);; 安徽省军民科技协同攻关项目(JMKJXTB001)

作者(Author): 鲁飞,陈正文,韦志超,王振刚,梁勇,乔建勋
LU Fei,CHEN Zhengwen,WEI Zhichao,WANG Zhengang,LIANG Yong,QIAO Jianxun

参考文献(References)：

• [1]鲁飞，程道武，段有民.高压甲胺泵缸体开裂原因分析及解决措施[J].通用机械，2005(1)：46-49.LU F，CHENG D W，DUAN Y M.Cause analysis and solution of cylinder block cracking of high pressure Methylamine Pump[J].General Machinery，2005(1)：46-49.
• [2]莫丽，刘清友，黄云，等.压裂泵阀箱强度及寿命分析[J].石油机械，2009(2)：29-31.MO L，LIU Q Y，HUANG Y，et al.Strength and life analysis of fracturing pump valve box[J].Petroleum Machinery，2009(2)：29-31.
• [3]周谧，林铁军，周健.厚壁圆筒自增强理论与数值模拟对比分析[J].压力容器，2017，34(6)：14-18.ZHOU M，LIN T J，ZHOU J.Comparison of theory and nemerrical simulation for thick-walled cylinder autofrettage[J].Pressure Vessel，2017，34(6)：14-18.
• [4]王新杰，姚健松，周志刚.超高压组合缸体自增强工艺的有限元模拟与对比研究[J].液压与气动，2018(3)：32-38.WANG X J，YAO J S，ZHOU Z G.Finite element simulation and comparative study on self-reinforced technology of multilayer ultrahigh pressure cylinder[J].Chinese Hydraulics & Pneumatics，2018(3)：32-38.
• [5]往复泵设计编写组.往复泵设计[M].北京：机械工业出版社，1987.Reciprocating Pump Design Team.Reciprocating pump design[M].Beijing：China Machine Press，1987.
• [6]薛胜雄.高压水射流技术工程[M].合肥：合肥工业大学出版社，2006.XUE S X.High pressure water jet technology engineering[M].Hefei：Hefei University of Technology Press，2006.
• [7]郑修麟，王泓，鄢君辉，等.材料疲劳理论与工程应用[M].北京：科学出版社，2013.ZHENG X L，WANG H，YAN J H，et al.Material fatigue theory and engineering application[M].Beijing：Science Press，2013.
• [8]王名扬，徐增丙，林辉，等.混流式喷水推进泵压力脉动数值分析[J].流体机械，2021，49(10)：84-90.WANG M Y，XU Z B，LIN H，et al.Numerical analysis of pressure fluctuation of mixed-flow waterjet propulsion pump[J].Fluid Machinery，2021，49(10)：84-90.
• [9]化工设备设计全书编辑委员会.超高压容器设计[M].上海：上海科学技术出版社，1983.Editorial Board of the Whole Book of Chemical Equipment Design.Design of ultra high pressure vessel[M].Shanghai：Shanghai Science and Technology Press，1983.
• [10]钱素娟，赵浩，张伟.基于 MOHS-SVM 算法的离心泵转子疲劳寿命评估研究[J].化工设备与管道，2021，58(2)：71-75.QIAN S J，ZHAO H，ZHANG W.Assessment of fatigue life for rotor in centrifugal pump based on MOHS-SVM algorithm[J].Process Equipment & Piping，2021，58(2)：71-75.
• [11]姚卫星.结构疲劳寿命分析[M].北京：国防工业出版社，2003.YAO W X.Structural fatigue life analysis[M].Beijing：National Defense Industry Press，2003.
• [12]王超，谈金祝，刘欣，等.氯化钙溶液环境下单螺杆泵定子材料的损伤研究[J].流体机械，2021，49(3)：27-33.WANG C，TAN J Z，LIU X，et al.Research on degradation of single screw pump stator material in calcium chloride solution environments[J].Fluid Machinery，2021，49(3)：27-33.