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Method and apparatus for predicting the life of a rolling bearing, rolling bearing selection apparatus using the life prediction apparatus, and storage medium

  • US 7,006,953 B2
  • Filed: 08/29/2001
  • Issued: 02/28/2006
  • Est. Priority Date: 08/29/2000
  • Status: Active Grant
First Claim
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1. A method of using a computer to predict a life of a rolling bearing having a specification which a basic dynamic load rating C and a basic static load rating C0 are calculable,wherein, when a dynamic equivalent load is P, a load index is p, a viscosity ratio of a lubricant is κ

  • , a contamination degree coefficient is ac, a fatigue limit load is Pu, and a life correction coefficient is aNSK, causing the computer to calculate a correction rating life LA of the rolling bearing at a certain reliability coefficient a1 by the following relations;


    LA=a1·

    a
    NSK·

    (C/P)P
    aNSK

    f[F


    ), {(P−

    Pu
    )/C

    1/ac];

    wherein a function F(κ

    ) of the viscosity ratio κ

    is set as a lubrication parameter aL, andwherein the life correction coefficient aNSK is calculated on the basis of the lubrication parameter aL and a load parameter {(P−

    Pu)/C}·

    1/ac.

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