DESIGN OF HEAVILY LOADED CYCLOIDAL TRANSMISSION WITH FREE CAGE BASED ON CONTACT STRENGTH

Abstract

The relevance of the research is caused by the need to design heavily loaded mechanisms for mining industry and by the lack of methods for preliminary determination of geometric parameters of cycloidal transmission with intermediate rolling bodies and free cage loading links based on contact strength condition. The technique makes it possible to use compact and energy-saving transmissions with reasonable reliability and durability in drives of mining and transport mechanisms. The main aim of the research is to identify the dependence of one of the main geometric parameters for transmission with intermediate rolling bodies and a free cage from the contact strength condition, as well as to develop graphic materials for choosing the transmission kinematic coefficient included in the final dependence. Objects of the research are the cycloidal profiles of the transmission gears at the points of contact with intermediate rolling bodies, as well as the main geometric parameters of the gears necessary for their design. Methods: analytical methods of the gear engagement theory and stress-strain state of the part. Results. The authors have given basic equations for determining the geometric parameter of transmission with intermediate rolling bodies and a free cage from the condition of contact strength; an expression was obtained for determining the minimum permissible value of the geometric parameter of transmission with intermediate rolling bodies and a free cage. The paper introduces the histogram for determining the kinematic coefficient of the transmission from a given displacement coefficient and the number of rolling bodies. The results will contribute to the design of reliable, compact, energy-efficient mechanisms for difficult working conditions, which is especially in demand in the mining and oil and gas industries.

Keywords

• heavily loaded mechanism
• mining equipment
• cycloidal transmission
• intermediate rolling bodies
• contact strength condition
• cycloidal profile
• kinematic coefficient
• free cage