1 Scope
This standard specifies calculation method for the basic dynamic load ratings life of the spherical plain bearings.
This standard is applicable to radial spherical plain bearings, angular contact spherical plain bearings, thrust spherical plain bearings and spherical plain bearings rod ends whose dimension ranges are in accordance with GB/T 9161, GB/T 9162, GB/T 9163 and GB/T 9164, and technical conditions are in accordance with those specified in relevant standards.
This standard is not applicable to spherical plain bearings for special structures or working under abnormal service conditions, such as special materials, special sliding contact surface, special clearance, inner and outer rings with relatively oversize inclination, shaft or housing with oversize deformation.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigendum), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents applies. For undated references, the latest editions apply.
GB/T 3944-2002 Spherical Plain Bearings - Vocabulary (ISO 6811: 1998, IDT)
GB/T 6930-2002 Rolling Bearings - Vocabulary (ISO 5593: 1997, IDT)
GB/T 9161-2001 Spherical Plain Bearings - Spherical Plain Bearings Rod Ends (eqv ISO 12240-4: 1998)
GB/T 9162-2001 Spherical Plain Bearings - Thrust Spherical Plain Bearings (eqv ISO 12240-3: 1998)
GB/T 9163-2001 Spherical Plain Bearings - Radial Spherical Plain Bearings (eqv ISO 12240-1: 1998)
GB/T 9164-2001 Spherical Plain Bearings - Angular Contact Radial Spherical Plain Bearings (eqv ISO 12240-2: 199
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Dynamic Load Ratings of Spherical Plain Bearings
5.1 Radial Spherical Plain Bearings
5.2 Angular Contact Spherical Plain Bearings
5.3 Thrust Spherical Plain Bearings
5.4 Spherical Plain Bearings Rod Ends
6 Calculation Methods for Dynamic Equivalent Load
6.1 Radial Spherical Plain Bearings
6.2 Angular Contact Spherical Plain Bearings
6.3 Thrust Spherical Plain Bearings
6.4 Variable Dynamic Equivalent Load
7 Life Calculation of Spherical Plain Bearings
7.1 Sliding Velocity of Spherical Surfaces of Spherical Plain Bearings
7.2 Nominal Contact Stress
7.3 pv Limit of Spherical Plain Bearings
7.4 Lubrication Life of Spherical Plain Bearings
7.5 Multi-lubrication Life
7.6 Bearing Life under Sectional Load
Table 1 fr
Table 2 fra
Table 3 fa
Table 4 Xr
Table 5 Xra
Table 6 Ya
Table 7 ζ
Table 8 k
Table 9 p, v and pv Limits
Table 10 Coefficient
Table 11 G and b
Table 12 Coefficient αz
Table 13 Coefficient αh
Table 14 Coefficient αβ
