| 20000kN static presser belongs to the ultrahigh-pressure device, it's the most commonly used equipment for diamond synthesis, and it occupies a larger share of the domestic market because of its advantages of convenient operation and relatively low production cost. In our country's superhard materials industry, it also occupies a decisive location. Its performance, which is an important criteria that measures the diamond synthesis technology, determines the quality of the synthetic diamond. With the development of diamond synthesis technology, there are more and more requirements to the equipment for diamond synthesis, therefore, improving the reliability of the static presser is imperative.The hinge sleeve system is the important component part of static presser, and during the diamond synthesis process it needs to bear great pressure, so its performance directly influences the performance of static presser, thereby affects the quality of the synthetic diamond. Therefore, in order to increase the service life of the equipment, it's necessary to carry out intension analysis and reliability analysis for the hinge sleeve system.This paper mainly introduces the basic theory of finite element method,analytic process,the specific application of finite element method in reliability analysis, and introduces the main functions and characteristics of the 3D design software SolidWorks and the finite element analysis software ANSYS. By the means ofstructure analysis, we focus on the key part of hinge sleeve system——the hinge sleeve,set up its finite element model, carry out intension analysis, and based on this, make reliability analysis.First, SolidWorks is used to create the 3D model of hinge sleeve system in accordance with design requirement, then the analysis and calculation for space-based force of hinge sleeve system are carried out, and the key parts is checked. Then, the finite element model is established in ANSYS where it is dealed with static analysis and nonlinear analysis. Through the analysis and calculation in ANSYS, the deformation, stress distribution and stress concentration of the structure are given out. The result shows, the "ear" and cylinder bottom of hinge sleeve have stress convergence, this is in accord with the actually ruptured area in the hinge sleeve, which is testified to be the same as actual situation. The paper also does some improvements of the partial structure's curves for the areas of stress convergence, and carries out the analysis of improvement effect. Finally, the faults of hinge sleeve system and the reasons for the faults are analyzed using the method of fault tree analysis, and the degree of reliability of hinge sleeve is calculated using machine components stress, intensity "interfere" model.The study shows that in the reliability analysis, combining CAE technology with reliability can help to improve design and analysis level of the mechanical accessory, shorten research and development cycle, and reduce the cost. It has very important significance for the future's development trends of reliability analysis. |
