Failure Analysis for Teeth Broken of a Gearbox
Abstract For the phenomenon of broken teeth in the transmission， the causes are analyzed. The gear raw materials chemical composition， non-metallic inclusions， heat treatment hardness， carburized layer thickness， metallographic structure are checked. The metallographic structure of the abnormal wear...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Journal of Mechanical Transmission
2020-05-01
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| Series: | Jixie chuandong |
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| Online Access: | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2020.05.023 |
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| author | Donghai Gao |
| author_facet | Donghai Gao |
| author_sort | Donghai Gao |
| collection | DOAJ |
| description | Abstract For the phenomenon of broken teeth in the transmission， the causes are analyzed. The gear raw materials chemical composition， non-metallic inclusions， heat treatment hardness， carburized layer thickness， metallographic structure are checked. The metallographic structure of the abnormal wear site indicated that the friction burns have occurred. Combining with the characteristics of gearbox， the No.1 crack is considered to be the fatigue crack source of gear hub cracking. The gear hub cracking destroys the meshing relationship， reduce the bending fatigue strength， and cause teeth breakage. The analysis of assembly relationship of layshaft assembly， the axis clearance eliminated because of the synchronizer hub position shifting is the cause of tooth fracture. For gearbox shaft assembly included many components， correct assembly relationship between each other， and reliable fixation of assembly position have an important influence on the reliability of gear. |
| format | Article |
| id | doaj-art-32d2f9af46ed4b518f2b123b955901f5 |
| institution | Kabale University |
| issn | 1004-2539 |
| language | zho |
| publishDate | 2020-05-01 |
| publisher | Editorial Office of Journal of Mechanical Transmission |
| record_format | Article |
| series | Jixie chuandong |
| spelling | doaj-art-32d2f9af46ed4b518f2b123b955901f52025-01-10T14:56:01ZzhoEditorial Office of Journal of Mechanical TransmissionJixie chuandong1004-25392020-05-014413914529797255Failure Analysis for Teeth Broken of a GearboxDonghai GaoAbstract For the phenomenon of broken teeth in the transmission， the causes are analyzed. The gear raw materials chemical composition， non-metallic inclusions， heat treatment hardness， carburized layer thickness， metallographic structure are checked. The metallographic structure of the abnormal wear site indicated that the friction burns have occurred. Combining with the characteristics of gearbox， the No.1 crack is considered to be the fatigue crack source of gear hub cracking. The gear hub cracking destroys the meshing relationship， reduce the bending fatigue strength， and cause teeth breakage. The analysis of assembly relationship of layshaft assembly， the axis clearance eliminated because of the synchronizer hub position shifting is the cause of tooth fracture. For gearbox shaft assembly included many components， correct assembly relationship between each other， and reliable fixation of assembly position have an important influence on the reliability of gear.http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2020.05.023Gearbox |
| spellingShingle | Donghai Gao Failure Analysis for Teeth Broken of a Gearbox Jixie chuandong Gearbox |
| title | Failure Analysis for Teeth Broken of a Gearbox |
| title_full | Failure Analysis for Teeth Broken of a Gearbox |
| title_fullStr | Failure Analysis for Teeth Broken of a Gearbox |
| title_full_unstemmed | Failure Analysis for Teeth Broken of a Gearbox |
| title_short | Failure Analysis for Teeth Broken of a Gearbox |
| title_sort | failure analysis for teeth broken of a gearbox |
| topic | Gearbox |
| url | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2020.05.023 |
| work_keys_str_mv | AT donghaigao failureanalysisforteethbrokenofagearbox |