水机过流件护面弹性涂层的粒子流冲击溃裂与磨蚀研究*（修改稿）

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (2) : 155-158.

论文

水机过流件护面弹性涂层的粒子流冲击溃裂与磨蚀研究*（修改稿）

郭源君1; 殷炯1; 何剑雄1; 胡斌梁1; 胡辉1; 黄伟九2

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Study on the Debacle and Abrasion of Elastic coating of Hydraulic Turbine

Guo Yuanjun1; Yin Jiong1; He Jianxiong1; Hu Hui1; Hu Binliang1; Huang Weijiu2

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摘要

采用刚性球面与弹性体斜冲击接触模型，考虑法向与切向面力的耦合作用，分析了粒子冲击过程中弹性涂层表面的接触动应力。结果表明，弹性涂层表面接触区拉应力是导致磨蚀急剧增加的主要因素；同时指出，高速粒子流冲击可导致弹性体内应力波不能及时传播从而发生表面溃裂。根据分析结论,对应不同的冲击角，计算出弹性涂层应用的极限射流速度约为39-69m/s，与冲蚀实验结果相差10%左右。

Abstract

Using slanting impact contact model of rigid spherical surface and elastic coating, considering coupling function of normal and shear surface force caused by particles in the impacting process ,the contact dynamic stress of elastic coating surface are analyzed ; The results indicate that the primary factor of abrasion sharp growth is the contact tensile stress of the elastic coating surface, the high speed impact of particles stream may results Surface debacle of elastic coating because the stress wave can not disseminate promptly in elastic coating . According to the analysis conclusion, corresponding different jet angle ，the limit velocity that causes abrasion sharp growth of elastic coating is computed in the scope of 39-68m/s, the difference between theoretical analysis and experimental results about 10%.

导出引用

郭源君;殷炯;何剑雄;胡斌梁;胡辉;黄伟九. 水机过流件护面弹性涂层的粒子流冲击溃裂与磨蚀研究*（修改稿）[J]. 振动与冲击, 2011, 30(2): 155-158

Guo Yuanjun;Yin Jiong;He Jianxiong;Hu Hui;Hu Binliang;Huang Weijiu. Study on the Debacle and Abrasion of Elastic coating of Hydraulic Turbine[J]. Journal of Vibration and Shock, 2011, 30(2): 155-158