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METHOD TO DETERMINE HYSTERESIS LOSSES WITH PENDULUM TRIBOMETER
申请公布号：RU2559120(C1)
申请号：RU20140119417
申请日期：2014.05.14
申请公布日期：2015.08.10
发明人：KARAGIOZ OLEG VSEVOLODOVICH;IZMAJLOV VALERIJ PETROVICH;SHAKHPARONOV VLADIMIR MIKHAJLOVICH
分类号：G01N19/02
主分类号：G01N19/02
摘要：FIELD: measurement equipment.SUBSTANCE: coefficients of rolling friction are calculated on the basis of coefficients of hysteresis losses and radii of spots of contact of ball supports of a pendulum tribometer with tested samples. The method to determine hysteresis losses by the pendulum tribometer consists in the fact that after degreasing of surfaces of contacting bodies they couple the flat working surface of samples with ball supports of a physical pendulum, for which the initial amplitude of oscillations is set, and amplitudes of subsiding pendulum oscillations are recorded. Besides, the initial amplitude of pendulum oscillations ?is selected on the basis of the condition ??0.4a/R, where a - radius of contact spot, R - radius of ball supports of the pendulum, the centre of gravity of the pendulum is matched with its supports, using amplitudes of pendulum oscillations they determine good quality of the system Q=?n/ln(?/?), where ?- amplitude after n complete oscillations, and the coefficient of hysteresis losses of the material of samples is C=?/Q.EFFECT: reduced error of measurements due to exclusion of viscous friction against air and adhesive interaction of contacting bodies.tbl, 1 dwg