Machinery & Energetics

The approach to study the issue of providing the necessary service life of bolted fastener is proposed on basis of analysis of the vibration of the bolt head and nut. The resulting graphical dependence of the energy and the vibration power of the bolted fastener can be used to agree the necessary parameters of the threaded fastener to the working conditions of the machines. The study took into consideration the vibration of the bearing surfaces of the bolt head and the nut in mutually perpendicular directions (in planes perpendicular to the axis of the threaded rod). This vibration is the result of moving masses of working bodies of technological material and the influence of the phenomenon of dissipation. Vibration is a forced, and exists due to the balance of the energy supplied to the oscillating system and the energy spent on friction. Based on the analysis of vibration bearing surface of the bolt head and nut introduced the concept of "synchronous" and "asynchronous" connection. Numerical analysis of vibration threaded connections agricultural machinery allows to judge about the functioning capacity of the threaded connection of the cross compelled by force and relative angular vibration of the bearing surfaces of the bolt head and nut. Studies relevant for use in simulation modeling of this process, which will predict the resource threaded connections, plan preventive actions and to achieve maximum compliance with the required parameters of threaded connections, the working conditions of the machine.

threaded fasteners, vibration, kinematics, agricultural machinery