Calculation and Designing the Rotary Elements

Abstract

There are numerous applications of mechanical rotating elements; they are used broadly in many fields, such as engines, civil planes, warplanes, and recently used in drones. Because the rotating blade is subjected to loads raised from its rotation and aerodynamic loads, a design analysis study has been conducted to show the distribution of loads, stresses σ_x, and bending moment Mx along the length of the blade. Rotary elements such as shafts, gears, flywheels, and bearings are critical mechanical components in systems that involve rotational motion, ranging from automotive and aerospace applications to industrial machinery. Despite their widespread use, designing these elements for optimal performance, safety, and longevity remains a complex task due to the multiple dynamic forces they endure, including centrifugal forces, dynamic loads, and stress concentrations. The values of equivalent increase in thickness tx that must be added to the original thickness t of the element at the specific section were computed to keep the rotating element (blade) safe under the stated loading conditions. The study showed that the added thickness to the original thickness of the studied blade is contrary to the expected fact that it gradually changes from a very small value at the free end, and reaches its maximum value at a distance of 50 cm from the center of rotation. This involved applying mechanics and material science principles, using analytical methods and computational tools. Moreover, adherence to industry standards and safety regulations is crucial to mitigate risks such as fatigue, wear, and potential failure. By integrating advanced calculation techniques with robust design methodologies, engineers can create rotary elements that meet performance specifications and contribute to the overall reliability and efficiency of the machinery they serve.