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| Failure Analysis of Paper Drying Cylinder Crushing |
| Received:January 03, 2025 Revised:February 28, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.07.022 |
| Key Words:paper drying cylinder failure analysis dynamic balance test |
| Fund Project:国家重点研发计划（2022YFB4004403）；山东省重点研发计划（2022SFGC0801）；国家开发投资集团有限公司科技项目（SDIC2023-06）。 |
| Author Name | Affiliation | Postcode | | SHANG Xiandong* | Shandong Special Equipment Inspection Institute Group Co., Ltd., Ji’nan, Shandong Province, 250101 | 250101 | | GAO Xiaozhe* | Shandong Special Equipment Inspection Institute Group Co., Ltd., Ji’nan, Shandong Province, 250101 | 250101 | | WANG Shujie | Shandong Special Equipment Inspection Institute Group Co., Ltd., Ji’nan, Shandong Province, 250101 | 250101 | | SHEN Xiaomin | Shandong Special Equipment Inspection Institute Group Co., Ltd., Ji’nan, Shandong Province, 250101 | 250101 | | LU Hui | Shandong Special Equipment Inspection Institute Group Co., Ltd., Ji’nan, Shandong Province, 250101 | 250101 | | ZHU Bo | Shandong Special Equipment Inspection Institute Group Co., Ltd., Ji’nan, Shandong Province, 250101 | 250101 | | CHEN Xiugang | Shandong Special Equipment Inspection Institute Group Co., Ltd., Ji’nan, Shandong Province, 250101 | 250101 | | LIU Wenjie | Shandong Special Equipment Inspection Institute Group Co., Ltd., Ji’nan, Shandong Province, 250101 | 250101 | | SONG Mingda | Shandong Special Equipment Inspection Institute Group Co., Ltd., Ji’nan, Shandong Province, 250101 | 250101 |
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| Abstract:A crushing accident occurred during the dynamic balance test of a newly purchased drying cylinder in a paper mill. In this study， systematic analysis of the accident drying cylinder was conducted using methods such as macroscopic inspection， chemical analysis， hardness testing， mechanical performance testing， metallographic structure analysis， fracture morphology analysis， and theoretical calculation. The research showed that during the dynamic balance test of the drying cylinder， the rotating speed of the testing machine significantly exceeded the speed specified in the drawing， and the stress generated in the cylinder body under the action of centrifugal force exceeded the tensile strength of the material， which caused breaking of the cylinder body. The research also revealed the deficiencies in the current relevant national standards regarding the requirements for the chemical composition and metallographic structure of gray cast iron， and put forward targeted modification suggestions. |
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