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BSI BS ISO 7902-1:2020

Hydrodynamic plain journal bearings under steady-state conditions. Circular cylindrical bearings -- Calculation procedure
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BSI BS ISO 7902-1:2020

Hydrodynamic plain journal bearings under steady-state conditions. Circular cylindrical bearings -- Calculation procedure

PUBLISH DATE 2020
PAGES 40
BSI BS ISO 7902-1:2020

This document specifies a calculation procedure for oil-lubricated hydrodynamic plain bearings, with complete separation of the shaft and bearing sliding surfaces by a film of lubricant, used for designing plain bearings that are reliable in operation.

It deals with circular cylindrical bearings having angular spans, ?, of 360°, 180°, 150°, 120°, and 90°, the arc segment being loaded centrally. Their clearance geometry is constant except for negligible deformations resulting from lubricant film pressure and temperature.

The calculation procedure serves to provide dimensions and optimize plain bearings in turbines, generators, electric motors, gear units, rolling mills, pumps, and other machines. It is limited to steady-state operation, i.e. under continuously driven operating conditions, with the magnitude and direction of loading as well as the angular speeds of all rotating parts constant. It can also be applied if a full plain bearing is subjected to a constant force rotating at any speed. Dynamic loadings (i.e. those whose magnitude and direction vary with time), such as those that can result from vibration effects and instabilities of rapid-running rotors, are not taken into account.

NOTE

Equivalent calculation procedures exist that enable operating conditions to be estimated and checked against acceptable conditions. The use of them is equally admissible.

SDO BSI: British Standards Institution
Document Number ISO 7902-1
Publication Date Aug. 3, 2020
Language en - English
Page Count 40
Revision Level
Supercedes
Committee MCE/12
Publish Date Document Id Type View
Aug. 3, 2020 BS ISO 7902-1:2020 Revision
Nov. 30, 2013 BS ISO 7902-1:2013 Revision