Reason analysis on low strength of motors in hydraulic burst test
The burst pressure of some samples during the hydraulic test for a batch of motors were found lower than the design requirement leading to early damage on the motors.in order to solve this problem,a failure tree was set up, the test conditions were examined, the configuration of damaged samples was analyzed, the manufacturing process and production conditions were investigated, and the material and dimension of the bottom covers and size of the shell thread hole were re-inspected and tested.The analytical tests and investigation results indicate that early damage in motors is caused by low strength in the bottom covers and the newly purchased test equipment was defective.The raw material in the bottom covers is not consistent in strength, which leads to low overall strength.Moreover, the raw material passes strength inspection in sampling tests, but it is difficult to guarantee the quality of the whole batch.The influence of heating process during surface treatment cannot be ignored.The failure analysis of this batch of motors demonstrates that for important aluminum bearing parts, it is necessary to strictly control the acceptance tests for raw materials, to improve manufacturing and inspection equipment, and to enhance the management process making it fit with the requirements of process reliability so as to ensure the reliability in both the acceptance process of raw materials and the manufacturing process of components.
Motor Hydraulic burst test Bottom cover of aluminum alloy Failure analysis Quality management
Hai-yun WANG Ying-ying RUAN Meng-lin WANG Chun-chen YAO Xing-yun CHEN Lu BIN Hai-yan WU
Jiangnan Industries Group Co., Ltd, Xiangtan, China School of Foreign Languages, Beijing Technology and Business University, Beijing, 10048, China
国际会议
2018 International Conference on Defence Technology (2018国际防务技术会议)
北京
英文
383-386
2018-10-21（万方平台首次上网日期，不代表论文的发表时间）