WANG Yan-qing , JI Zhe , CUI Yong-li , CUI Chun-zhi , SUN Zhi
{"title":"风机叶片失效分析","authors":"WANG Yan-qing , JI Zhe , CUI Yong-li , CUI Chun-zhi , SUN Zhi","doi":"10.1016/S1006-1266(08)60096-6","DOIUrl":null,"url":null,"abstract":"<div><p>The failure of all 12 blades of an air fan was investigated by metallurgical and mechanical experiments and an examination of the fracture surface. The experimental results show that the cast aluminium-silicon alloy without any modification had a number of material defects, such as coarse grains, a loose structure, a large number of shrinkage holes, a long and thin bold-pin shaped silicon-phase, poor material strength and serious brittleness. In addition, installed on the spindle without elastic conjunction, blade No.10 vibrated and inevitably. spun off due to the large centrifugal force. Therefore, blade No.10 first cracked at the locking handle, then broke at the root, which caused all the other 11 blades to be broken by the crack of blade No.10.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 3","pages":"Pages 466-469"},"PeriodicalIF":0.0000,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60096-6","citationCount":"5","resultStr":"{\"title\":\"Failure analysis of air fan blades\",\"authors\":\"WANG Yan-qing , JI Zhe , CUI Yong-li , CUI Chun-zhi , SUN Zhi\",\"doi\":\"10.1016/S1006-1266(08)60096-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The failure of all 12 blades of an air fan was investigated by metallurgical and mechanical experiments and an examination of the fracture surface. The experimental results show that the cast aluminium-silicon alloy without any modification had a number of material defects, such as coarse grains, a loose structure, a large number of shrinkage holes, a long and thin bold-pin shaped silicon-phase, poor material strength and serious brittleness. In addition, installed on the spindle without elastic conjunction, blade No.10 vibrated and inevitably. spun off due to the large centrifugal force. Therefore, blade No.10 first cracked at the locking handle, then broke at the root, which caused all the other 11 blades to be broken by the crack of blade No.10.</p></div>\",\"PeriodicalId\":15315,\"journal\":{\"name\":\"Journal of China University of Mining and Technology\",\"volume\":\"18 3\",\"pages\":\"Pages 466-469\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2008-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60096-6\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of China University of Mining and Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1006126608600966\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of China University of Mining and Technology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1006126608600966","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The failure of all 12 blades of an air fan was investigated by metallurgical and mechanical experiments and an examination of the fracture surface. The experimental results show that the cast aluminium-silicon alloy without any modification had a number of material defects, such as coarse grains, a loose structure, a large number of shrinkage holes, a long and thin bold-pin shaped silicon-phase, poor material strength and serious brittleness. In addition, installed on the spindle without elastic conjunction, blade No.10 vibrated and inevitably. spun off due to the large centrifugal force. Therefore, blade No.10 first cracked at the locking handle, then broke at the root, which caused all the other 11 blades to be broken by the crack of blade No.10.
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