Technologies and Engineering

Calculations of details in order to estimate their reliability and durability by criterion of fatigue strength

Purpose. Development of the basic provisions for determination of the equivalent stress in accordance with the spectrum of the load of cylindrical spiral springs of the overload release clutches of the rotatory impeller breaker mills with the further use of such basic provisions in calculations aimed to estimate reliability and durability of details by criterion of fatigue strength. Methodology. Up-to-date methods of determination of statistical characteristics of resistance of details fatigue, computer methods of processing of the load spectrums, as well as the elements of mathematical statistics and theory of probability are used. Findings. Preliminary studies for working out of the design of the overload release clutches in order to estimate their reliability and durability by criterion of fatigue strength at limited initial data on the loads and mechanical characteristics of the strength of springs are presented. Originality. Lies in the further development of the theory and methodology of mathematical support for the design of the machine details with the specified characteristics of reliability and longevity on base of loads spectrum. Practical value. The presented information allows increasing the quality and efficiency of the design solutions on the provision of given rigidity of the elastic overload release clutches together with their compliance with the reliability and durability requirements. Significant normative and reference support regarding the object of the research is recommended

design, calculation, cylindrical spiral spring, fatigue, reliability, longevity