Transactions of Materials and Heat Treatment

Title：Research on critical preload parameters of bearing-bending composite structure for large forging equipment

Authors： Dong Xiaochuan Jin Miao

Unit： Tianjin University of Technology & Education China Academy of Machinery Science and Technology Group Co. Ltd. Yanshan University

KeyWords： bearing-bending structure preload combination critical preload parameters span to height ratio numerical simulation

ClassificationCode：TG315.4

year,vol(issue):pagenumber：2019,44(6):115-121

Abstract：

For the critical preload parameters of bearing-bending composite structure, the stress in the x-direction at the middle section of bending model and compression model was analyzed by numerical simulation, and the results were compared with those calculated by Airy stress function. It is found that the error is caused by the incomplete satisfactions of the stress function at the boundary conditions. Therefore, the magnification factor of
beam length was proposed to weaken the influence of the boundary conditions. And the magnification factor is confirmed that it is only related to the span to height ratio. Furthermore, the calculation equation of the critical preload parameters was modified and compared with the experiment. The results show that the calculated results of the modified equation agree with the experimental values well. The minimum error is 5.4%, and the maximum error is 9.4%. It can predict the critical preload parameters of bearing-bending composite structures well.Thus, the new method is provided for calculating the critical preload parameters of bearing-bending composite structure.

Funds：

天津市教委科研计划项目（2017KJ101，2017KJ104)

董晓传（1984-），男，博士，讲师 E-mail：dong_xiaochuan@163.com

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