Plain bearings Hydrodynamic plain thrust pad bearings under steady-state conditions Part 1: Calculation of thrust pad bearings

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Withdrawn date

07-14-2020

Language(s)

English, French

Published date

04-25-2001

Publisher

International Organization for Standardization

The aim of this part of ISO 12131 is to achieve designs of plain bearings that are reliable in operation, by the

application of a calculation method for oil-lubricated hydrodynamic plain bearings with complete separation of the

thrust collar and plain bearing surfaces by a film of lubricant [1].

This part of ISO 12131 applies to plain thrust bearings with incorporated wedge and supporting surfaces having

any ratio of wedge surface length lwed to length of one pad L. It deals with the value lwed/L = 0,75 as this value

represents the optimum ratio [2]. The ratio of width to length of one pad can be varied in the range B/L = 0,5 to 2.

The calculation method described in this part of ISO 12131 can be used for other incorporated gap shapes, e.g.

plain thrust bearings with integrated baffle, when for these types the numerical solutions of Reynolds' differential

equation are known.

The calculation method serves for designing and optimizing plain thrust bearings e.g. for fans, gear units, pumps,

turbines, electrical machines, compressors and machine tools. It is limited to steady-state conditions, i.e. load and

angular speed of all rotating parts are constant under continuous operating conditions. Dynamic operating

conditions are not included.

DocumentType	Standard
Pages	25
PublisherName	International Organization for Standardization
Status	Withdrawn
SupersededBy	ISO 12131-1:2020

ISO 12131-2:2016	Plain bearings — Hydrodynamic plain thrust pad bearings under steady-state conditions — Part 2: Functions for the calculation of thrust pad bearings
ISO 12131-3:2001	Plain bearings Hydrodynamic plain thrust pad bearings under steady-state conditions Part 3: Guide values for the calculation of thrust pad bearings

ISO 12131-3:2001	Plain bearings Hydrodynamic plain thrust pad bearings under steady-state conditions Part 3: Guide values for the calculation of thrust pad bearings
ISO 12131-2:2016	Plain bearings — Hydrodynamic plain thrust pad bearings under steady-state conditions — Part 2: Functions for the calculation of thrust pad bearings
ISO 3448:1992	Industrial liquid lubricants — ISO viscosity classification