METHOD TO DETERMINE COEFFICIENT OF DRY FRICTION OF FRICTION PAIRS IN CASE OF QUICK-OSCILLATING MOVEMENTS Russian patent published in 2013 - IPC G01N19/02 

FIELD: measurement equipment.

SUBSTANCE: one fixed part of a friction pair performing a damper function is pressed with a varied controlled force to another movable part of this pair, making a quick-oscillating movement on resonant frequency with one free and other fixed opposite end. Vibratory stresses of a movable part are registered, which vary as friction pair parts interact according to scattering of energy of oscillations due to dry friction between parts. The digitised record of the signal is filtered from noise, and experimental dependence of filtered vibratory stresses is generated from pressing forces. Values of experimental dependence are compared with the rated ones, produced according to the model by FE analysis, with values of appropriate version of pressing forces. Values of the rated dependence coefficient are gone over, and the dry friction coefficient is determined as the value of coefficient, at which the rated vibratory stress is to the maximum close to the experimental value for this force of pressing.

EFFECT: higher validity of determination of a dry friction coefficient of friction pairs in case of quick-oscillating movements.

7 dwg