British Standards Institution

Source:: ISO
Committee:: MCE/12 - Plain bearings
Categories:: Bearings. Plain
Comment period start date:: 02/12/2024
Comment period end date:: 25/01/2025
Number of comments:: 0

Comment by:

25th Jan

Scope

This document specifies the characteristic values for selected tilting-pad journal bearings with four or five centrally or eccentrically supported tilting pads and with angular spans of pad sliding surfaces of Ω = 80°, 60° and 45°.

The functions plotted and listed in table form below are required for the operationally safe design of hydrodynamic tilting-pad journal bearings according to ISO 31657-1. They are based on the presumptions and boundary conditions indicated there and only apply to stationary operating states. The symbols used are explained in ISO 31657-1; calculation examples are also included there.

The calculation method described in ISO 31657-1 can also be used for other tilting-pad journal bearing designs, if the numerical solutions of the basic equations are available in the same manner for these designs.

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

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

26/09/2024

3. Public Comments

Public Comments start date:

02/12/2024

Public Comments end date:

25/01/2025

Learn more about the standards development process

Standards Development

BS ISO 31657-3 ISO 31657-3 Plain bearings. Hydrodynamic plain journal bearings under steady-state conditions. Part 3: Functions for calculation of tilting pad journal bearings

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