流体机械

2007, No.426(12) 9-12

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超高压缸自紧增强实验研究
Experimental Study on the Mechanical Autofrettage of Superhigh Pressure Cylinder

杨志峰;雷玉勇;熊佳;袁其源;
YANG Zhi-feng,LEI Yu-yong,XIONG Jia,YUAN Qi-yuan(Xihua University,Chengdu 610039,China)

摘要(Abstract):

对超高压缸的内应力进行了理论分析,采用液压机直压的方法对超高压缸进行了疲劳实验。实验结果表明,在试验条件下,采用外内径的比值为2.25、材料为40Cr、经过自紧处理的超高压缸在承受相同压力条件下缸体的壁厚最小,疲劳寿命最长。本研究对减少水射流机床超高压缸体壁厚、延长超高压缸寿命具有重要意义。
The interior stress of super-high pressure cylinder was analyzed theoretically. The experiments on cylinder fatigue were carried out on hydraulic machine.It was shows that on the experimental condition,when the ratio of outside diameter to inside diameter is 2.25,cylinder material is 40Cr and the cylinder was mechanical autofrettaged,the cylinder thickness is thinnest and the fatigue life of the cylinder is the longest.The thickness of super-high pressure cylinder on water jet machine could be reduced and the fatigue life could be greatly extended as the results of this study.

关键词(KeyWords): 超高压缸;疲劳实验;自紧;交变应力
superhigh pressure cylinder;fatigue experiment;mechanical autofrettage;fatigue alternating stress.

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基金项目(Foundation): 四川省科技厅项目(05202073);; 四川省教育厅项目(05202099)

作者(Author): 杨志峰;雷玉勇;熊佳;袁其源;
YANG Zhi-feng,LEI Yu-yong,XIONG Jia,YUAN Qi-yuan(Xihua University,Chengdu 610039,China)

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