METHOD OF DIAGNOSING ANTIFRICTION BEARING IMMOVABLE RACE IN DOUBLE-SUPPORT ASSEMBLY Russian patent published in 1998 - IPC

FIELD: measurement technology. SUBSTANCE: shaft with race of bearing under test secured to it, is rotated, bearing under test is loaded with radial force , integral parameter of relubrication intervals of bearing under test is measured in different sections of raceway. Quality of this section surface is determined by parameter deviation. For loading of bearing under test, at distances of L₁ and L₂ from it shaft unbalances are created with radial load vectors of and , respectively, equal in absolute value F₁ = PL₂/L₃, F₂ = F₁L₁/L₂ and having similar direction in case of arrangement of load points and on different sides of bearing under test. They may have opposite directions in case load points and are positioned on one side of bearing under test. In this case, every measurement is performed during time at which vector passes through angular sector ∓2π/Z from position of center of one and the same section of bearing under test inherent to given measurement only. Number n of raceway sections of bearing under test is selected multiple of Z from condition n ≥ 2π/ϕ,, where $ is number of bearing rolling elements; ϕ - is permissible angular discretization step determined by accuracy of defect location; L₃ is space between and . EFFECT: elimination of effect of nontested bearing quality on diagnosing result. 5 dwg