Stabilization of operating parameters of friction pairs in brake devices

Abstract

Theoretical and experimental studies of the dynamic and thermal loading of friction pairs of brake devices from the point of view of assessing the stability and stability of their operating parameters allowed us to propose the following. The efficiency of the friction unit of band-pad brakes by stabilizing the load of the friction unit based on modeling its stress-strain state and wear in the modes of lowering the drill string and drilling, as well as substantiation of methods for calculating the design and operational parameters of friction pairs of brakes. However, nothing was said about the local problem of stabilizing the operating parameters of friction pairs of brakes. Goal. The purpose of the development is to substantiate the method of generalizing the operating parameters of brake friction pairs for preliminary prediction of fluctuations in their stabilization and stability values. Methodology. Analytical methods were used to study the dynamic and energy load of friction pairs in disc-pad brakes. The efficiency of the brakes and the stabilization of their operating parameters were determined. Results. Based on the elements of the theory of thermal similarity, a method of basic generalized parameters of friction pairs is proposed, relating to their average, maximum and minimum values regarding their stabilization, oscillations and stability, a clear sequence and relationship of the operating parameters of friction pairs of braking devices is determined, temperature gradients of metal friction elements are estimated and their permissible values for calculating heating and forced cooling rates are determined. Originality. The proposed method of generalized operating parameters of brake friction pairs allows predicting them and establishing their oscillations, stability, and elasticity. Practical value. Using this method will increase the efficiency of friction pairs of disc-pad brake devices, as well as improve their wear resistance and frictional properties during cyclic braking.